Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
549 FNUS55 KBYZ 151845 FWFBYZ Fire Weather Planning Forecast for SCen and SErn Montana National Weather Service Billings MT 1245 PM MDT Tue Sep 15 2026 .DISCUSSION... ...Gusty southerly winds tonight SE MT/W SD... ...Next Precipitation Potential Thursday-Saturday... Dry conditions expected tonight through Wednesday. Expect strong RH recoveries tonight. Southerly winds will get gusty tonight into Wednesday morning over SE Montana and W SD, with gusts to 30 mph possible over the higher exposed terrain. A weak dry cold front will shift winds to the north during the day Wednesday. Warmer temperatures with chances for showers and thunderstorms increasing Thursday into Friday. Strong wetting rain chances are in the forecast for Friday night through Saturday, with light snow possible in the higher elevations of area mountains. Chambers MTZ123-161015- Gallatin National Forest- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......35-43 at 5000 feet...32-42 at 7000 feet. * 24 hr trend.........4 degrees warmer. * Max humidity..........75-85 percent at 5000 feet...66-76 percent at 7000 feet. * 24 hr trend.........17 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......67-77 at 5000 feet...57-67 at 7000 feet. * 24 hr trend.........Unchanged. * Min humidity..........28-38 percent at 5000 feet...31-41 percent at 7000 feet. * 24 hr trend.........13 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly clear in the evening then becoming mostly cloudy. * Min temperature.......40-50 at 5000 feet...38-48 at 7000 feet. * 24 hr trend.........4 degrees warmer. * Max humidity..........78-88 percent at 5000 feet...74-84 percent at 7000 feet. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Partly sunny. Isolated rain showers in the morning, then scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......71-81 at 5000 feet...61-71 at 7000 feet. * 24 hr trend.........7 degrees warmer. * Min humidity..........37-47 percent at 5000 feet...43-53 percent at 7000 feet. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph. * Ridgetop.............Southeast 5 to 10 mph. * Chance of lightning...21 percent. * CWR...................20 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms. Lows 45 to 55. South winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 42 to 52. Highs 68 to 77. Southwest winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 41 to 51. Highs 64 to 74. Southwest winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 40 to 50. Highs 67 to 77. Southwest winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 42 to 52. Highs 70 to 80. .TUESDAY...Mostly sunny. Highs 70 to 80. $$ MTZ124-161015- Wheatland County/Sweet Grass County- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Mostly clear in the evening then becoming mostly cloudy. * Min temperature.......39-44. * 24 hr trend.........3 degrees warmer. * Max humidity..........92-97 percent. * 24 hr trend.........12 percent wetter. * Wind (20 ft) * Plains...............East winds 10 to 20 mph with gusts to around 30 mph in the evening shifting to the northwest 5 to 15 mph overnight. * Chance of lightning...1 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......64-69. * 24 hr trend.........2 degrees warmer. * Min humidity..........36-41 percent. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...1 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly clear. Patchy fog overnight. * Min temperature.......41-46. * 24 hr trend.........2 degrees warmer. * Max humidity..........94-99 percent. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph in the evening shifting to the south 5 to 10 mph overnight. * Chance of lightning...0 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Partly sunny in the morning then clearing. Patchy fog in the morning. * Max temperature.......70-75. * 24 hr trend.........6 degrees warmer. * Min humidity..........37-42 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph in the morning shifting to the southeast 5 to 15 mph in the afternoon. * Chance of lightning...5 percent. * CWR...................Zero. .Forecast days 3 through 7...... .THURSDAY NIGHT...Partly cloudy. Lows 48 to 53. South winds 5 to 15 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 47 to 52. Highs 73 to 78. Northwest winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 46 to 51. Highs 68 to 73. West winds 5 to 15 mph. .SUNDAY...Mostly clear. Lows 44 to 49. Highs 71 to 76. West winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 46 to 51. Highs 74 to 79. .TUESDAY...Mostly sunny. Highs 73 to 78. $$ MTZ125-161015- Stillwater County- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Mostly clear. * Min temperature.......40-45. * 24 hr trend.........2 degrees warmer. * Max humidity..........73-78 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph in the evening shifting to the west 5 to 10 mph overnight. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......65-70. * 24 hr trend.........Unchanged. * Min humidity..........32-37 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph in the morning shifting to the northeast 5 to 15 mph in the afternoon. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Partly cloudy. * Min temperature.......44-49. * 24 hr trend.........4 degrees warmer. * Max humidity..........81-86 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph in the evening shifting to the southwest 5 to 10 mph overnight. * Chance of lightning...0 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Partly sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......71-76. * 24 hr trend.........6 degrees warmer. * Min humidity..........35-40 percent. * 24 hr trend.........3 percent wetter. * Wind (20 ft) * Plains...............Light winds in the morning becoming east 5 to 10 mph in the afternoon. * Chance of lightning...16 percent. * CWR...................10 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Partly cloudy. Lows 51 to 56. Southwest winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 48 to 53. Highs 74 to 79. West winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Numerous showers and isolated thunderstorms. Lows 46 to 51. Highs 68 to 73. West winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 45 to 50. Highs 71 to 76. Southwest winds 5 to 10 mph. .MONDAY...Partly cloudy. Lows 46 to 51. Highs 73 to 78. .TUESDAY...Mostly sunny. Highs 74 to 79. $$ MTZ126-161015- Beartooth Ranger District Custer National Forest- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Mostly clear. * Min temperature.......41-50 at 5000 feet...38-48 at 7000 feet. * 24 hr trend.........12 degrees warmer. * Max humidity..........62-72 percent at 5000 feet...55-65 percent at 7000 feet. * 24 hr trend.........28 percent drier. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 15 mph. * Ridgetop.............South 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......62-71 at 5000 feet...55-65 at 7000 feet. * 24 hr trend.........1 degree cooler. * Min humidity..........34-44 percent at 5000 feet...39-49 percent at 7000 feet. * 24 hr trend.........12 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...1 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly clear in the evening then becoming mostly cloudy. * Min temperature.......45-54 at 5000 feet...39-49 at 7000 feet. * 24 hr trend.........1 degree warmer. * Max humidity..........70-75 percent. * 24 hr trend.........19 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 15 mph in the evening shifting to the southwest 5 to 10 mph overnight. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Partly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......68-76 at 5000 feet...62-72 at 7000 feet. * 24 hr trend.........7 degrees warmer. * Min humidity..........37-47 percent at 5000 feet...40-50 percent at 7000 feet. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 15 mph. * Ridgetop.............Southeast 5 to 10 mph. * Chance of lightning...18 percent. * CWR...................30 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Isolated showers. Lows 52 to 61. Southwest winds 5 to 15 mph. .FRIDAY...Mostly cloudy. Showers and isolated thunderstorms. Lows 50 to 56. Highs 71 to 78. West winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Numerous showers and isolated thunderstorms. Lows 47 to 54. Highs 63 to 70. West winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 46 to 54. Highs 64 to 74. West winds 5 to 10 mph. .MONDAY...Partly cloudy. Lows 48 to 56. Highs 68 to 78. .TUESDAY...Mostly sunny. Highs 68 to 78. $$ MTZ127-161015- Golden Valley County/Musselshell county- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Mostly clear. * Min temperature.......41-46. * 24 hr trend.........2 degrees cooler. * Max humidity..........79-84 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............Northeast winds 10 to 20 mph. Gusts up to 30 mph in the evening. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......60-65. * 24 hr trend.........1 degree warmer. * Min humidity..........46-51 percent. * 24 hr trend.........11 percent wetter. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly clear. * Min temperature.......45-50. * 24 hr trend.........4 degrees warmer. * Max humidity..........90-95 percent. * 24 hr trend.........11 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Mostly sunny. Patchy fog in the morning. * Max temperature.......68-73. * 24 hr trend.........8 degrees warmer. * Min humidity..........44-49 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Plains...............Southeast winds 5 to 15 mph. * Chance of lightning...3 percent. * CWR...................Zero. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Lows 54 to 59. Southeast winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 52 to 57. Highs 71 to 76. Northwest winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Numerous showers and scattered thunderstorms. Lows 49 to 54. Highs 63 to 68. Northwest winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 47 to 52. Highs 67 to 72. Southwest winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 49 to 54. Highs 70 to 75. .TUESDAY...Mostly sunny. Highs 69 to 74. $$ MTZ128-161015- Yellowstone County- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Mostly clear. Patchy smoke in the evening. * Min temperature.......42-47. * 24 hr trend.........1 degree warmer. * Max humidity..........89-94 percent. * 24 hr trend.........12 percent wetter. * Wind (20 ft) * Plains...............East winds 10 to 20 mph in the evening shifting to the north 5 to 15 mph overnight. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......66-71. * 24 hr trend.........Unchanged. * Min humidity..........40-45 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 15 mph in the morning shifting to the northeast in the afternoon. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Partly cloudy. Patchy fog overnight. * Min temperature.......46-51. * 24 hr trend.........4 degrees warmer. * Max humidity..........95-100 percent. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Mostly sunny. Patchy fog in the morning. * Max temperature.......73-78. * 24 hr trend.........7 degrees warmer. * Min humidity..........39-44 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............East winds 5 to 10 mph. * Chance of lightning...4 percent. * CWR...................Zero. .Forecast days 3 through 7...... .THURSDAY NIGHT...Partly cloudy. Lows 54 to 59. South winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 52 to 57. Highs 77 to 82. Northwest winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 49 to 54. Highs 69 to 74. West winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 47 to 52. Highs 72 to 77. West winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 48 to 53. Highs 75 to 80. .TUESDAY...Mostly sunny. Highs 74 to 79. $$ MTZ129-161015- Crow Indian Reservation/Bighorn Canyon Rec Area- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......43-48. * 24 hr trend.........2 degrees warmer. * Max humidity..........68-78 percent at 5000 feet...49-58 percent at 7000 feet. * 24 hr trend.........9 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 10 to 20 mph. Gusts up to 30 mph in the evening. * Ridgetop.............Southeast 10 to 20 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......60-70 at 5000 feet...55-61 at 7000 feet. * 24 hr trend.........Unchanged. * Min humidity..........36-46 percent at 5000 feet...40-49 percent at 7000 feet. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............North 10 to 20 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly clear in the evening then becoming mostly cloudy. * Min temperature.......46-53 at 5000 feet...44-49 at 7000 feet. * 24 hr trend.........5 degrees warmer. * Max humidity..........72-82 percent at 5000 feet...62-72 percent at 7000 feet. * 24 hr trend.........11 percent wetter. * Wind (20 ft) * Slope/valley.........East winds 5 to 15 mph. * Ridgetop.............Northeast 5 to 10 mph. * Chance of lightning...2 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Partly sunny. * Max temperature.......67-77 at 5000 feet...62-68 at 7000 feet. * 24 hr trend.........9 degrees warmer. * Min humidity..........37-47 percent at 5000 feet...46-56 percent at 7000 feet. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........Southeast winds 10 to 20 mph. * Ridgetop.............Southeast 5 to 10 mph. * Chance of lightning...5 percent. * CWR...................Zero. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Lows 54 to 60. Southeast winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 51 to 56. Highs 69 to 79. Northwest winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Numerous showers and isolated thunderstorms. Lows 48 to 54. Highs 61 to 71. West winds 5 to 15 mph. .SUNDAY...Mostly clear. Isolated showers. Lows 46 to 53. Highs 65 to 75. Northwest winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 48 to 55. Highs 69 to 79. .TUESDAY...Mostly sunny. Highs 69 to 79. $$ MTZ130-161015- Northern Rosebud/Northern Treasure Counties- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Clear in the evening then becoming partly cloudy. * Min temperature.......45-50. * 24 hr trend.........4 degrees warmer. * Max humidity..........89-94 percent. * 24 hr trend.........9 percent drier. * Wind (20 ft) * Plains...............East winds 10 to 20 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......67-72. * 24 hr trend.........1 degree warmer. * Min humidity..........42-47 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Partly cloudy. Patchy fog overnight. * Min temperature.......45-50. * 24 hr trend.........Unchanged. * Max humidity..........100 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Partly sunny. Patchy fog in the morning. * Max temperature.......76-81. * 24 hr trend.........9 degrees warmer. * Min humidity..........43-48 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...4 percent. * CWR...................Zero. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Patchy fog. Lows 54 to 59. Southeast winds 5 to 15 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 53 to 58. Highs 77 to 82. North winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Numerous showers and isolated thunderstorms. Lows 47 to 52. Highs 68 to 73. Northwest winds 5 to 10 mph. .SUNDAY...Partly cloudy. Scattered showers. Lows 44 to 49. Highs 69 to 74. North winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 46 to 51. Highs 74 to 79. .TUESDAY...Mostly sunny. Highs 74 to 79. $$ MTZ131-161015- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......44-49. * 24 hr trend.........8 degrees warmer. * Max humidity..........82-87 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 10 to 20 mph. * Ridgetop.............South 10 to 20 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......70-75. * 24 hr trend.........2 degrees warmer. * Min humidity..........31-36 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 10 to 20 mph. * Ridgetop.............North 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Partly cloudy. Patchy fog overnight. * Min temperature.......43-48. * 24 hr trend.........1 degree cooler. * Max humidity..........100 percent. * 24 hr trend.........15 percent wetter. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 15 mph. * Ridgetop.............Northeast 5 to 10 mph. * Chance of lightning...6 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the morning. Patchy fog in the morning. * Max temperature.......76-81. * 24 hr trend.........6 degrees warmer. * Min humidity..........41-46 percent. * 24 hr trend.........10 percent wetter. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 15 mph. * Ridgetop.............Southeast 5 to 15 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Patchy fog. Lows 52 to 57. Southeast winds 5 to 15 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 50 to 55. Highs 79 to 84. North winds 5 to 10 mph. .SATURDAY...Not as warm. Mostly cloudy. Numerous showers and isolated thunderstorms. Lows 44 to 49. Highs 69 to 74. Northwest winds 5 to 10 mph. .SUNDAY...Partly cloudy. Scattered showers. Lows 42 to 47. Highs 71 to 76. North winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 46 to 51. Highs 76 to 81. .TUESDAY...Mostly sunny. Highs 76 to 81. $$ MTZ132-161015- Custer County- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Clear in the evening then becoming partly cloudy. * Min temperature.......49-54. * 24 hr trend.........6 degrees warmer. * Max humidity..........80-85 percent. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Plains...............East winds 10 to 20 mph. Gusts up to 30 mph overnight. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......70-75. * 24 hr trend.........6 degrees warmer. * Min humidity..........37-42 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............South winds 10 to 20 mph in the morning shifting to the northwest in the afternoon. * Chance of lightning...1 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly clear in the evening then becoming mostly cloudy. Patchy fog overnight. * Min temperature.......46-51. * 24 hr trend.........3 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........18 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...2 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Patchy fog in the morning. Mostly cloudy with isolated rain showers. * Max temperature.......70-75. * 24 hr trend.........Unchanged. * Min humidity..........47-52 percent. * 24 hr trend.........10 percent wetter. * Wind (20 ft) * Plains...............Southeast winds 10 to 20 mph. * Chance of lightning...8 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Isolated showers. Lows 56 to 61. Southeast winds 10 to 20 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 54 to 59. Highs 76 to 81. Southeast winds 5 to 15 mph. .SATURDAY...Cooler. Mostly cloudy. Showers and isolated thunderstorms. Lows 48 to 53. Highs 66 to 71. West winds 5 to 15 mph. .SUNDAY...Partly cloudy. Scattered showers. Lows 46 to 51. Highs 67 to 72. North winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 50 to 55. Highs 71 to 76. .TUESDAY...Mostly sunny. Highs 73 to 78. $$ MTZ133-161015- Sioux Ranger District Custer National Forest- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Partly cloudy. * Min temperature.......50-55. * 24 hr trend.........8 degrees warmer. * Max humidity..........83-88 percent. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Plains...............Southeast winds 10 to 20 mph. Gusts up to 30 mph overnight. * Chance of lightning...10 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......78-83. * 24 hr trend.........10 degrees warmer. * Min humidity..........31-36 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Plains...............South winds 10 to 20 mph with gusts to around 30 mph in the morning shifting to the west 5 to 15 mph in the afternoon. * Chance of lightning...1 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly clear in the evening then becoming mostly cloudy. Patchy fog overnight. * Min temperature.......47-52. * 24 hr trend.........3 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........15 percent wetter. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...13 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Patchy fog in the morning. Cloudy with scattered rain showers and isolated thunderstorms. * Max temperature.......68-73. * 24 hr trend.........10 degrees cooler. * Min humidity..........64-69 percent. * 24 hr trend.........33 percent wetter. * Wind (20 ft) * Plains...............Southeast winds 10 to 20 mph. Gusts up to 30 mph in the afternoon. * Chance of lightning...21 percent. * CWR...................30 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Cloudy. Scattered showers and isolated thunderstorms. Lows 54 to 59. Southeast winds 15 to 25 mph with gusts to around 30 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 53 to 58. Highs 74 to 79. Southeast winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Numerous showers and scattered thunderstorms. Lows 49 to 54. Highs 68 to 73. West winds 5 to 15 mph. .SUNDAY...Mostly cloudy. Scattered showers. Lows 45 to 50. Highs 69 to 74. North winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 47 to 52. Highs 73 to 78. .TUESDAY...Mostly sunny. Highs 74 to 79. $$ WYZ274-161015- Sheridan County- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Mostly cloudy. * Min temperature.......42-47. * 24 hr trend.........8 degrees warmer. * Max humidity..........76-81 percent. * 24 hr trend.........7 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 15 mph in the evening shifting to the southwest 5 to 10 mph overnight. * Ridgetop.............South 10 to 20 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......70-75. * 24 hr trend.........1 degree warmer. * Min humidity..........32-37 percent. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............North 5 to 15 mph. * Chance of lightning...1 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly cloudy. Patchy fog overnight. * Min temperature.......41-46. * 24 hr trend.........1 degree cooler. * Max humidity..........100 percent. * 24 hr trend.........22 percent wetter. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph in the evening shifting to the south overnight. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...4 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Partly sunny. Patchy fog in the morning. Isolated rain showers in the morning, then isolated showers and thunderstorms in the afternoon. * Max temperature.......75-80. * 24 hr trend.........5 degrees warmer. * Min humidity..........41-46 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 15 mph. * Ridgetop.............Southeast 5 to 10 mph. * Chance of lightning...17 percent. * CWR...................10 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Lows 49 to 54. South winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 46 to 51. Highs 76 to 81. Northwest winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 41 to 46. Highs 69 to 74. Northwest winds 5 to 10 mph. .SUNDAY...Mostly clear. Isolated showers. Lows 39 to 44. Highs 71 to 76. Northwest winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 42 to 47. Highs 76 to 81. .TUESDAY...Mostly sunny. Highs 76 to 81. $$ WYZ284-161015- Bighorn National Forest- 1245 PM MDT Tue Sep 15 2026 .Tonight... * Sky/weather...........Mostly cloudy in the evening then clearing. * Min temperature.......37-42. * 24 hr trend.........12 degrees warmer. * Max humidity..........65-70 percent. * 24 hr trend.........21 percent drier. * Wind (20 ft) * At Burgess Jct.......South winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......61-66. * 24 hr trend.........6 degrees warmer. * Min humidity..........26-31 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * At Burgess Jct.......Southwest winds 5 to 15 mph in the morning shifting to the north in the afternoon. * Chance of lightning...1 percent. * CWR...................Zero. .WEDNESDAY NIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......36-41. * 24 hr trend.........1 degree cooler. * Max humidity..........84-89 percent. * 24 hr trend.........19 percent wetter. * Wind (20 ft) * At Burgess Jct.......East winds 5 to 15 mph in the evening shifting to the south overnight. * Chance of lightning...4 percent. * CWR...................Zero. .THURSDAY... * Sky/weather...........Mostly cloudy. Isolated rain showers in the morning, then scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......63-68. * 24 hr trend.........2 degrees warmer. * Min humidity..........43-48 percent. * 24 hr trend.........17 percent wetter. * Wind (20 ft) * At Burgess Jct.......South winds 5 to 15 mph. * Chance of lightning...16 percent. * CWR...................30 percent. .Forecast days 3 through 7...... .THURSDAY NIGHT...Mostly cloudy. Patchy fog. Isolated showers and thunderstorms. Lows 42 to 47. Southwest winds 5 to 15 mph. .FRIDAY...Mostly cloudy. Showers and scattered thunderstorms. Lows 37 to 42. Highs 63 to 68. West winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Numerous showers and scattered thunderstorms. Lows 34 to 39. Highs 56 to 61. West winds 5 to 15 mph. .SUNDAY...Mostly clear. Scattered showers. Lows 33 to 38. Highs 57 to 62. West winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 36 to 41. Highs 62 to 67. .TUESDAY...Mostly sunny. Highs 63 to 68. $$ weather.gov/billings