Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
235 FNUS55 KBYZ 180813 FWFBYZ Fire Weather Planning Forecast for SCen and SErn Montana National Weather Service Billings MT 213 AM MDT Fri Sep 18 2026 ...Widespread significant rainfall tonight through Sunday... .DISCUSSION... A slow-moving weather system is expected to bring frequent showers and some embedded thunderstorms this afternoon through Sunday. Precipitation with this system will be widespread and significant, with much of the region seeing between 1 and 3 inches of total rainfall, with up to 4 inches possible where thunderstorms are more persistent. This is a warm system and snow levels will remain high, above 10k feet. After a cool weekend look for drying and warming Monday/Tuesday. JKL MTZ123-182215- Gallatin National Forest- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the morning, then numerous rain showers and scattered thunderstorms in the afternoon. * Max temperature.......67-76 at 5000 feet...56-66 at 7000 feet. * 24 hr trend.........5 degrees cooler. * Min humidity..........51-61 percent at 5000 feet...56-66 percent at 7000 feet. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...33 percent. * CWR...................40 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then numerous rain showers and isolated thunderstorms overnight. * Min temperature.......44-53 at 5000 feet...40-50 at 7000 feet. * 24 hr trend.........4 degrees cooler. * Max humidity..........89-94 percent. * 24 hr trend.........12 percent wetter. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 10 mph in the evening becoming light overnight. * Ridgetop.............Light winds. * Chance of lightning...34 percent. * CWR...................80 percent. .SATURDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Numerous rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. * Max temperature.......54-64 at 5000 feet...46-56 at 7000 feet. * 24 hr trend.........12 degrees cooler. * Min humidity..........70-80 percent at 5000 feet...77-87 percent at 7000 feet. * 24 hr trend.........27 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...33 percent. * CWR...................90 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Showers and isolated thunderstorms. Lows 41 to 50. Light winds. .SUNDAY...Partly cloudy. Scattered showers. Lows 39 to 47. Highs 60 to 70. West winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 42 to 50. Highs 67 to 77. Southwest winds 5 to 10 mph. .TUESDAY...Partly cloudy. Isolated showers. Lows 42 to 52. Highs 69 to 79. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 43 to 53. Highs 70 to 79. .THURSDAY...Sunny. Highs 71 to 81. $$ MTZ124-182215- Wheatland County/Sweet Grass County- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Partly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......73-78. * 24 hr trend.........2 degrees warmer. * Min humidity..........38-43 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...24 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers overnight. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......49-54. * 24 hr trend.........Unchanged. * Max humidity..........90-95 percent. * 24 hr trend.........11 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 15 mph. * Chance of lightning...28 percent. * CWR...................80 percent. .SATURDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Rain showers in the morning, then rain showers and isolated thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. * Max temperature.......56-61. * 24 hr trend.........17 degrees cooler. * Min humidity..........76-81 percent. * 24 hr trend.........38 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...21 percent. * CWR...................90 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Patchy fog. Showers and isolated thunderstorms. Lows 46 to 51. Northwest winds 5 to 15 mph. .SUNDAY...Partly cloudy. Patchy fog. Scattered showers. Lows 44 to 49. Highs 64 to 69. South winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 46 to 51. Highs 70 to 75. South winds 5 to 15 mph. .TUESDAY...Partly cloudy. Lows 46 to 51. Highs 74 to 79. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 46 to 51. Highs 73 to 78. .THURSDAY...Sunny. Highs 75 to 80. $$ MTZ125-182215- Stillwater County- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Mostly sunny with isolated rain showers in the morning, then mostly cloudy with scattered showers and thunderstorms in the afternoon. * Max temperature.......73-78. * 24 hr trend.........2 degrees warmer. * Min humidity..........42-47 percent. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph in the morning shifting to the east 5 to 15 mph in the afternoon. * Chance of lightning...32 percent. * CWR...................30 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers and isolated thunderstorms overnight. Some thunderstorms may produce heavy rainfall. * Min temperature.......50-55. * 24 hr trend.........2 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........28 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...32 percent. * CWR...................80 percent. .SATURDAY... * Sky/weather...........Cloudy. Numerous rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Patchy fog through the day. Some thunderstorms may produce heavy rainfall. * Max temperature.......57-62. * 24 hr trend.........16 degrees cooler. * Min humidity..........80-85 percent. * 24 hr trend.........38 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 15 mph. * Chance of lightning...34 percent. * CWR...................90 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Showers and isolated thunderstorms. Lows 47 to 52. Northwest winds 5 to 10 mph. .SUNDAY...Mostly cloudy. Numerous showers. Lows 45 to 50. Highs 61 to 66. West winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 46 to 51. Highs 70 to 75. South winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 47 to 52. Highs 74 to 79. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 47 to 52. Highs 74 to 79. .THURSDAY...Sunny. Highs 76 to 81. $$ MTZ126-182215- Beartooth Ranger District Custer National Forest- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Partly sunny. Isolated rain showers in the morning, then numerous rain showers and scattered thunderstorms in the afternoon. * Max temperature.......71-78 at 5000 feet...61-71 at 7000 feet. * 24 hr trend.........3 degrees cooler. * Min humidity..........39-49 percent at 5000 feet...49-59 percent at 7000 feet. * 24 hr trend.........15 percent wetter. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph. * Ridgetop.............East 5 to 15 mph. * Chance of lightning...33 percent. * CWR...................30 percent. .TONIGHT... * Sky/weather...........Cloudy. Patchy fog in the evening. Rain showers and scattered thunderstorms in the evening, then numerous rain showers overnight. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......51-57 at 5000 feet...42-52 at 7000 feet. * 24 hr trend.........6 degrees cooler. * Max humidity..........88-98 percent at 5000 feet...90-100 percent at 7000 feet. * 24 hr trend.........35 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...28 percent. * CWR...................80 percent. .SATURDAY... * Sky/weather...........Cloudy. Numerous rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Patchy fog through the day. Some thunderstorms may produce heavy rainfall. * Max temperature.......55-62 at 5000 feet...47-57 at 7000 feet. * 24 hr trend.........12 degrees cooler. * Min humidity..........83-93 percent at 5000 feet...81-91 percent at 7000 feet. * 24 hr trend.........33 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...35 percent. * CWR...................100 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Patchy fog. Showers and isolated thunderstorms. Lows 47 to 53. Northwest winds 5 to 15 mph. .SUNDAY...Mostly cloudy. Showers and isolated thunderstorms. Lows 45 to 51. Highs 55 to 63. West winds 5 to 10 mph. .MONDAY...Partly cloudy. Lows 48 to 54. Highs 62 to 71. South winds 5 to 10 mph. .TUESDAY...Partly cloudy. Isolated showers. Lows 48 to 56. Highs 68 to 77. Southwest winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Isolated showers. Lows 48 to 56. Highs 68 to 77. .THURSDAY...Sunny. Highs 70 to 79. $$ MTZ127-182215- Golden Valley County/Musselshell county- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Sunny. * Max temperature.......72-77. * 24 hr trend.........2 degrees warmer. * Min humidity..........41-46 percent. * 24 hr trend.........10 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...11 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Cloudy. Scattered rain showers and isolated thunderstorms in the evening, then rain showers and isolated thunderstorms overnight. Some thunderstorms may produce heavy rainfall. * Min temperature.......52-57. * 24 hr trend.........2 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........32 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...24 percent. * CWR...................80 percent. .SATURDAY... * Sky/weather...........Cloudy. Numerous rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall. * Max temperature.......54-59. * 24 hr trend.........18 degrees cooler. * Min humidity..........87-92 percent. * 24 hr trend.........46 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 10 to 20 mph. * Chance of lightning...28 percent. * CWR...................90 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Showers and scattered thunderstorms. Lows 50 to 55. North winds 5 to 15 mph. .SUNDAY...Mostly cloudy. Patchy fog. Showers. Lows 48 to 53. Highs 56 to 61. Northeast winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 49 to 54. Highs 64 to 69. South winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 51 to 56. Highs 71 to 76. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 51 to 56. Highs 71 to 76. .THURSDAY...Sunny. Highs 72 to 77. $$ MTZ128-182215- Yellowstone County- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......78-83. * 24 hr trend.........4 degrees warmer. * Min humidity..........37-42 percent. * 24 hr trend.........5 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...17 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers and isolated thunderstorms overnight. Some thunderstorms may produce heavy rainfall. * Min temperature.......53-58. * 24 hr trend.........1 degree cooler. * Max humidity..........100 percent. * 24 hr trend.........21 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...29 percent. * CWR...................80 percent. .SATURDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Numerous rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall. * Max temperature.......59-64. * 24 hr trend.........19 degrees cooler. * Min humidity..........87-92 percent. * 24 hr trend.........50 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...36 percent. * CWR...................100 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Showers and scattered thunderstorms. Lows 51 to 56. North winds 10 to 20 mph. .SUNDAY...Mostly cloudy. Patchy fog. Showers. Lows 48 to 53. Highs 61 to 66. North winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 49 to 54. Highs 70 to 75. South winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 50 to 55. Highs 75 to 80. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 50 to 55. Highs 75 to 80. .THURSDAY...Sunny. Highs 77 to 82. $$ MTZ129-182215- Crow Indian Reservation/Bighorn Canyon Rec Area- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Sunny. Isolated showers and thunderstorms in the afternoon. * Max temperature.......69-79 at 5000 feet...63-70 at 7000 feet. * 24 hr trend.........1 degree warmer. * Min humidity..........38-48 percent at 5000 feet...50-60 percent at 7000 feet. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 15 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers and isolated thunderstorms overnight. Patchy fog overnight. Some thunderstorms may produce heavy rainfall. * Min temperature.......49-57 at 5000 feet...47-52 at 7000 feet. * 24 hr trend.........1 degree cooler. * Max humidity..........86-96 percent at 5000 feet...100 percent at 7000 feet. * 24 hr trend.........21 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 15 mph. * Ridgetop.............North 5 to 15 mph. * Chance of lightning...34 percent. * CWR...................80 percent. .SATURDAY... * Sky/weather...........Cloudy. Numerous rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Patchy fog through the day. Some thunderstorms may produce heavy rainfall. * Max temperature.......55-65 at 5000 feet...49-55 at 7000 feet. * 24 hr trend.........16 degrees cooler. * Min humidity..........79-89 percent at 5000 feet...89-99 percent at 7000 feet. * 24 hr trend.........59 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...40 percent. * CWR...................90 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Patchy fog. Showers and scattered thunderstorms. Lows 46 to 53. Northwest winds 5 to 10 mph. .SUNDAY...Mostly cloudy. Patchy fog. Showers and scattered thunderstorms. Lows 45 to 51. Highs 53 to 63. Northwest winds 5 to 10 mph. .MONDAY...Partly cloudy. Lows 48 to 54. Highs 62 to 72. Southeast winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 50 to 55. Highs 68 to 78. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Isolated showers. Lows 50 to 56. Highs 68 to 78. .THURSDAY...Sunny. Highs 71 to 81. $$ MTZ130-182215- Northern Rosebud/Northern Treasure Counties- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Sunny. Patchy fog in the morning. * Max temperature.......79-84. * 24 hr trend.........Unchanged. * Min humidity..........39-44 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph in the morning shifting to the north 5 to 15 mph in the afternoon. * Chance of lightning...2 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered showers and thunderstorms in the evening, then numerous rain showers and isolated thunderstorms overnight. Patchy fog overnight. Some thunderstorms may produce heavy rainfall. * Min temperature.......54-59. * 24 hr trend.........1 degree cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...26 percent. * CWR...................70 percent. .SATURDAY... * Sky/weather...........Patchy fog in the morning. Cloudy with rain showers and isolated thunderstorms. Some thunderstorms may produce heavy rainfall. * Max temperature.......62-67. * 24 hr trend.........17 degrees cooler. * Min humidity..........91-96 percent. * 24 hr trend.........52 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...20 percent. * CWR...................80 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Patchy fog. Showers and isolated thunderstorms. Lows 50 to 55. East winds 5 to 15 mph. .SUNDAY...Cloudy. Patchy fog. Showers and isolated thunderstorms. Lows 48 to 53. Highs 62 to 67. East winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 48 to 53. Highs 70 to 75. Southeast winds 5 to 15 mph. .TUESDAY...Partly cloudy. Lows 49 to 54. Highs 76 to 81. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 49 to 54. Highs 76 to 81. .THURSDAY...Sunny. Highs 79 to 84. $$ MTZ131-182215- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Sunny. Patchy fog in the morning. * Max temperature.......81-86. * 24 hr trend.........Unchanged. * Min humidity..........31-36 percent. * 24 hr trend.........2 percent wetter. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph in the morning shifting to the north 5 to 15 mph in the afternoon. * Ridgetop.............North 5 to 15 mph. * Chance of lightning...6 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Numerous rain showers and scattered thunderstorms in the evening, then numerous rain showers and isolated thunderstorms overnight. Patchy fog overnight. * Min temperature.......52-57. * 24 hr trend.........Unchanged. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............Southwest 5 to 15 mph. * Chance of lightning...36 percent. * CWR...................70 percent. .SATURDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Numerous rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. * Max temperature.......64-69. * 24 hr trend.........17 degrees cooler. * Min humidity..........80-85 percent. * 24 hr trend.........49 percent wetter. * Wind (20 ft) * Slope/valley.........Northeast winds 5 to 15 mph. * Ridgetop.............Northeast 5 to 15 mph. * Chance of lightning...29 percent. * CWR...................70 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Patchy fog. Showers and scattered thunderstorms. Lows 48 to 53. Northeast winds 5 to 10 mph. .SUNDAY...Cloudy. Patchy fog. Showers and scattered thunderstorms. Lows 46 to 51. Highs 62 to 67. North winds 5 to 10 mph. .MONDAY...Partly cloudy. Lows 46 to 51. Highs 69 to 74. Southeast winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 48 to 53. Highs 76 to 81. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 47 to 52. Highs 77 to 82. .THURSDAY...Sunny. Highs 79 to 84. $$ MTZ132-182215- Custer County- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Sunny. Patchy fog in the morning. * Max temperature.......78-83. * 24 hr trend.........3 degrees cooler. * Min humidity..........44-49 percent. * 24 hr trend.........13 percent wetter. * Wind (20 ft) * Plains...............Southeast winds 5 to 15 mph. * Chance of lightning...1 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Isolated showers and thunderstorms in the evening, then scattered rain showers and isolated thunderstorms overnight. Patchy fog overnight. * Min temperature.......54-59. * 24 hr trend.........1 degree cooler. * Max humidity..........100 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...18 percent. * CWR...................30 percent. .SATURDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Numerous rain showers in the morning, then rain showers in the afternoon. * Max temperature.......62-67. * 24 hr trend.........16 degrees cooler. * Min humidity..........78-83 percent. * 24 hr trend.........34 percent wetter. * Wind (20 ft) * Plains...............East winds 10 to 20 mph. * Chance of lightning...10 percent. * CWR...................80 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy, showers. Lows 50 to 55. East winds 5 to 15 mph. .SUNDAY...Cloudy. Patchy fog. Showers. Lows 48 to 53. Highs 59 to 64. East winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 49 to 54. Highs 66 to 71. Southeast winds 5 to 15 mph. .TUESDAY...Partly cloudy. Lows 51 to 56. Highs 73 to 78. Southeast winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 51 to 56. Highs 75 to 80. .THURSDAY...Sunny. Highs 77 to 82. $$ MTZ133-182215- Sioux Ranger District Custer National Forest- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Mostly cloudy in the morning then becoming mostly sunny. Patchy dense fog in the morning. * Max temperature.......74-79. * 24 hr trend.........Unchanged. * Min humidity..........60-65 percent. * 24 hr trend.........17 percent wetter. * Wind (20 ft) * Plains...............Southeast winds 5 to 15 mph. * Chance of lightning...1 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers overnight. Patchy fog overnight. * Min temperature.......52-57. * 24 hr trend.........3 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Southeast winds 5 to 15 mph. * Chance of lightning...6 percent. * CWR...................Less than 10 percent. .SATURDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Scattered rain showers in the morning, then numerous rain showers in the afternoon. * Max temperature.......63-68. * 24 hr trend.........11 degrees cooler. * Min humidity..........79-84 percent. * 24 hr trend.........19 percent wetter. * Wind (20 ft) * Plains...............East winds 10 to 20 mph. Gusts up to 30 mph in the afternoon. * Chance of lightning...11 percent. * CWR...................40 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Showers and isolated thunderstorms. Lows 50 to 55. East winds 10 to 20 mph. .SUNDAY...Cloudy, showers. Lows 47 to 52. Highs 58 to 63. East winds 10 to 20 mph with gusts to around 30 mph. .MONDAY...Mostly cloudy. Lows 48 to 53. Highs 64 to 69. Southeast winds 10 to 20 mph with gusts to around 30 mph. .TUESDAY...Mostly cloudy. Lows 50 to 55. Highs 71 to 76. Southeast winds 10 to 20 mph with gusts to around 30 mph. .WEDNESDAY...Mostly clear. Isolated showers and thunderstorms. Lows 50 to 55. Highs 75 to 80. .THURSDAY...Sunny. Highs 77 to 82. $$ WYZ274-182215- Sheridan County- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Patchy fog in the morning. Sunny in the morning, then partly sunny with scattered showers and thunderstorms in the afternoon. * Max temperature.......78-83. * 24 hr trend.........3 degrees warmer. * Min humidity..........37-42 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph in the morning shifting to the north in the afternoon. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...26 percent. * CWR...................10 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then numerous rain showers and isolated thunderstorms overnight. Patchy fog overnight. Some thunderstorms may produce heavy rainfall. * Min temperature.......49-54. * 24 hr trend.........1 degree cooler. * Max humidity..........100 percent. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 15 mph in the evening shifting to the northwest 5 to 10 mph overnight. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...36 percent. * CWR...................70 percent. .SATURDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Scattered rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall. * Max temperature.......64-69. * 24 hr trend.........14 degrees cooler. * Min humidity..........80-85 percent. * 24 hr trend.........43 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...37 percent. * CWR...................90 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Patchy fog. Showers and scattered thunderstorms. Lows 45 to 50. Northwest winds 5 to 10 mph. .SUNDAY...Mostly cloudy. Areas of fog. Showers and scattered thunderstorms. Lows 42 to 47. Highs 61 to 66. Northwest winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 42 to 47. Highs 69 to 74. Southeast winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 43 to 48. Highs 75 to 80. Light winds. .WEDNESDAY...Mostly clear. Isolated showers. Lows 44 to 49. Highs 76 to 81. .THURSDAY...Sunny. Highs 79 to 84. $$ WYZ284-182215- Bighorn National Forest- 213 AM MDT Fri Sep 18 2026 .Today... * Sky/weather...........Sunny in the morning, then partly sunny with scattered showers and thunderstorms in the afternoon. * Max temperature.......63-68. * 24 hr trend.........Unchanged. * Min humidity..........42-47 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * At Burgess Jct.......West winds 5 to 10 mph in the morning shifting to the east 5 to 15 mph in the afternoon. * Chance of lightning...27 percent. * CWR...................20 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then numerous rain showers and isolated thunderstorms overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall. * Min temperature.......39-44. * 24 hr trend.........5 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * At Burgess Jct.......South winds 5 to 10 mph. * Chance of lightning...30 percent. * CWR...................70 percent. .SATURDAY... * Sky/weather...........Cloudy. Scattered rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Patchy fog through the day. Some thunderstorms may produce heavy rainfall. * Max temperature.......51-56. * 24 hr trend.........12 degrees cooler. * Min humidity..........81-86 percent. * 24 hr trend.........39 percent wetter. * Wind (20 ft) * At Burgess Jct.......Northwest winds 5 to 10 mph. * Chance of lightning...39 percent. * CWR...................90 percent. .Forecast days 3 through 7...... .SATURDAY NIGHT...Cloudy. Patchy fog. Showers and scattered thunderstorms. Lows 34 to 39. Northwest winds 5 to 10 mph. .SUNDAY...Mostly cloudy. Patchy fog. Showers and scattered thunderstorms. Lows 33 to 38. Highs 47 to 52. West winds 5 to 10 mph. .MONDAY...Partly cloudy. Scattered showers. Lows 34 to 39. Highs 54 to 59. South winds 5 to 10 mph. .TUESDAY...Partly cloudy. Isolated showers. Lows 37 to 42. Highs 60 to 65. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Isolated showers. Lows 38 to 43. Highs 61 to 66. .THURSDAY...Sunny. Highs 64 to 69. $$ weather.gov/billings