Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
933 FNUS55 KBYZ 190821 FWFBYZ Fire Weather Planning Forecast for SCen and SErn Montana National Weather Service Billings MT 221 AM MDT Sat Sep 19 2026 ...Cool and very wet weekend... .DISCUSSION... A slow-moving weather system will continue to bring frequent showers (heavy at times) and some embedded thunderstorms through the weekend. Rainfall totals between 1 and 4 inches are expected across the region. Snow levels will remain high, above 10k feet. After the cool & wet weekend look for warmer and drier conditions for the first half of next week. JKL MTZ123-192215- Gallatin National Forest- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. Patchy fog in the morning. Rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. * Max temperature.......52-62 at 5000 feet...46-56 at 7000 feet. * 24 hr trend.........16 degrees cooler. * Min humidity..........70-80 percent at 5000 feet...78-88 percent at 7000 feet. * 24 hr trend.........41 percent wetter. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming north 5 to 10 mph in the afternoon. * Ridgetop.............Light winds. * Chance of lightning...31 percent. * CWR...................100 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Patchy fog in the evening. Numerous rain showers in the evening, then scattered rain showers overnight. * Min temperature.......38-48 at 5000 feet...35-45 at 7000 feet. * 24 hr trend.........3 degrees cooler. * Max humidity..........86-96 percent at 5000 feet...82-92 percent at 7000 feet. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Slope/valley.........Light winds. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...11 percent. * CWR...................40 percent. .SUNDAY... * Sky/weather...........Partly sunny. Scattered rain showers in the morning. * Max temperature.......59-69 at 5000 feet...48-58 at 7000 feet. * 24 hr trend.........7 degrees warmer. * Min humidity..........50-60 percent at 5000 feet...55-65 percent at 7000 feet. * 24 hr trend.........32 percent drier. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming northwest 5 to 10 mph in the afternoon. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...7 percent. * CWR...................Less than 10 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly clear. Lows 38 to 46. South winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 40 to 49. Highs 67 to 77. Southwest winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 43 to 53. Highs 70 to 80. South winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 44 to 54. Highs 71 to 81. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 44 to 54. Highs 72 to 82. .FRIDAY...Mostly sunny. Highs 72 to 82. $$ MTZ124-192215- Wheatland County/Sweet Grass County- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Patchy fog in the morning. Cloudy with rain showers and isolated thunderstorms. Some thunderstorms may produce heavy rainfall. * Max temperature.......56-61. * 24 hr trend.........20 degrees cooler. * Min humidity..........76-81 percent. * 24 hr trend.........45 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 15 mph. * Chance of lightning...20 percent. * CWR...................100 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers in the evening, then numerous rain showers overnight. Patchy fog through the night. * Min temperature.......44-49. * 24 hr trend.........6 degrees cooler. * Max humidity..........89-94 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 15 mph. * Chance of lightning...10 percent. * CWR...................80 percent. .SUNDAY... * Sky/weather...........Mostly cloudy. Numerous rain showers in the morning. * Max temperature.......63-68. * 24 hr trend.........7 degrees warmer. * Min humidity..........53-58 percent. * 24 hr trend.........23 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph in the morning shifting to the northeast in the afternoon. * Chance of lightning...4 percent. * CWR...................20 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Lows 43 to 48. Southeast winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 43 to 48. Highs 71 to 76. South winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 46 to 51. Highs 75 to 80. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 46 to 51. Highs 76 to 81. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 46 to 51. Highs 77 to 82. .FRIDAY...Mostly sunny. Highs 76 to 81. $$ MTZ125-192215- Stillwater County- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. 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.......56-61. * 24 hr trend.........22 degrees cooler. * Min humidity..........80-85 percent. * 24 hr trend.........57 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...31 percent. * CWR...................100 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and isolated thunderstorms in the evening, then rain showers overnight. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......44-49. * 24 hr trend.........6 degrees cooler. * Max humidity..........83-88 percent. * 24 hr trend.........15 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................90 percent. .SUNDAY... * Sky/weather...........Cloudy. Numerous rain showers in the morning, then scattered rain showers in the afternoon. * Max temperature.......61-66. * 24 hr trend.........5 degrees warmer. * Min humidity..........56-61 percent. * 24 hr trend.........24 percent drier. * Wind (20 ft) * Plains...............North winds 5 to 10 mph. * Chance of lightning...9 percent. * CWR...................50 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Partly cloudy. Lows 43 to 48. Light winds. .MONDAY...Mostly clear. Lows 44 to 49. Highs 69 to 74. South winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 47 to 52. Highs 74 to 79. South winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 47 to 52. Highs 76 to 81. South winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 48 to 53. Highs 78 to 83. .FRIDAY...Mostly sunny. Highs 78 to 83. $$ MTZ126-192215- Beartooth Ranger District Custer National Forest- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Mostly cloudy. 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.......54-63 at 5000 feet...47-57 at 7000 feet. * 24 hr trend.........12 degrees cooler. * Min humidity..........73-83 percent at 5000 feet...77-87 percent at 7000 feet. * 24 hr trend.........52 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...35 percent. * CWR...................90 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and isolated thunderstorms in the evening, then numerous rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......43-49 at 5000 feet...36-46 at 7000 feet. * 24 hr trend.........5 degrees cooler. * Max humidity..........85-90 percent. * 24 hr trend.........13 percent drier. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 15 mph. * Chance of lightning...15 percent. * CWR...................80 percent. .SUNDAY... * Sky/weather...........Cloudy. Numerous rain showers in the morning, then scattered rain showers in the afternoon. * Max temperature.......55-62 at 5000 feet...48-58 at 7000 feet. * 24 hr trend.........1 degree warmer. * Min humidity..........66-76 percent at 5000 feet...70-80 percent at 7000 feet. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 15 mph. * Chance of lightning...10 percent. * CWR...................50 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Partly cloudy. Isolated showers. Lows 43 to 49. West winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 46 to 53. Highs 62 to 72. South winds 5 to 10 mph. .TUESDAY...Partly cloudy. Lows 49 to 55. Highs 67 to 77. South winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Isolated showers. Lows 49 to 56. Highs 69 to 78. Southwest winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 50 to 57. Highs 71 to 80. .FRIDAY...Mostly sunny. Highs 71 to 80. $$ MTZ127-192215- Golden Valley County/Musselshell county- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. Patchy fog in the morning. 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.......53-58. * 24 hr trend.........20 degrees cooler. * Min humidity..........87-92 percent. * 24 hr trend.........53 percent wetter. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...31 percent. * CWR...................100 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and isolated thunderstorms in the evening, then rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......48-53. * 24 hr trend.........3 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...24 percent. * CWR...................100 percent. .SUNDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Rain showers in the morning, then numerous rain showers in the afternoon. * Max temperature.......55-60. * 24 hr trend.........2 degrees warmer. * Min humidity..........88-93 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 15 mph. * Chance of lightning...14 percent. * CWR...................80 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Isolated showers. Lows 48 to 53. East winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 49 to 54. Highs 64 to 69. South winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 52 to 57. Highs 71 to 76. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 52 to 57. Highs 73 to 78. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 52 to 57. Highs 74 to 79. .FRIDAY...Sunny. Highs 74 to 79. $$ MTZ128-192215- Yellowstone County- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. Rain showers and isolated thunderstorms in the morning, then rain showers and scattered thunderstorms in the afternoon. Patchy fog through the day. Some thunderstorms may produce heavy rainfall. * Max temperature.......57-62. * 24 hr trend.........22 degrees cooler. * Min humidity..........86-91 percent. * 24 hr trend.........59 percent wetter. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...35 percent. * CWR...................100 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......49-54. * 24 hr trend.........5 degrees cooler. * Max humidity..........95-100 percent. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Plains...............North winds 10 to 20 mph. * Chance of lightning...25 percent. * CWR...................90 percent. .SUNDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Rain showers in the morning, then numerous rain showers in the afternoon. * Max temperature.......61-66. * 24 hr trend.........4 degrees warmer. * Min humidity..........79-84 percent. * 24 hr trend.........7 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 15 mph. * Chance of lightning...9 percent. * CWR...................70 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Isolated showers. Lows 47 to 52. East winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 48 to 53. Highs 70 to 75. South winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 50 to 55. Highs 75 to 80. South winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 51 to 56. Highs 77 to 82. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 51 to 56. Highs 79 to 84. .FRIDAY...Mostly sunny. Highs 78 to 83. $$ MTZ129-192215- Crow Indian Reservation/Bighorn Canyon Rec Area- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. 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.........19 degrees cooler. * Min humidity..........73-83 percent at 5000 feet...81-91 percent at 7000 feet. * 24 hr trend.........62 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Light winds. * Chance of lightning...44 percent. * CWR...................90 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then numerous rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......44-50 at 5000 feet...41-46 at 7000 feet. * 24 hr trend.........6 degrees cooler. * Max humidity..........85-95 percent at 5000 feet...90-100 percent at 7000 feet. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...27 percent. * CWR...................90 percent. .SUNDAY... * Sky/weather...........Patchy fog in the morning. Cloudy with rain showers. * Max temperature.......53-63 at 5000 feet...46-53 at 7000 feet. * 24 hr trend.........1 degree cooler. * Min humidity..........71-81 percent at 5000 feet...78-88 percent at 7000 feet. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...11 percent. * CWR...................80 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Scattered showers. Lows 43 to 49. Southwest winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 46 to 52. Highs 63 to 73. Southeast winds 5 to 10 mph. .TUESDAY...Mostly clear. Isolated showers. Lows 50 to 55. Highs 68 to 78. Southeast winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Lows 51 to 56. Highs 69 to 79. Southeast winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 52 to 57. Highs 72 to 82. .FRIDAY...Mostly sunny. Highs 72 to 82. $$ MTZ130-192215- Northern Rosebud/Northern Treasure Counties- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. Patchy fog in the morning. 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.......62-67. * 24 hr trend.........21 degrees cooler. * Min humidity..........90-95 percent. * 24 hr trend.........65 percent wetter. * Wind (20 ft) * Plains...............Northeast winds 5 to 15 mph. * Chance of lightning...35 percent. * CWR...................100 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......50-55. * 24 hr trend.........5 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Northeast winds 10 to 20 mph. * Chance of lightning...26 percent. * CWR...................90 percent. .SUNDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Rain showers in the morning, then numerous rain showers in the afternoon. * Max temperature.......61-66. * 24 hr trend.........1 degree cooler. * Min humidity..........85-90 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...11 percent. * CWR...................60 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Isolated showers. Lows 46 to 51. East winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 47 to 52. Highs 69 to 74. Southeast winds 5 to 15 mph. .TUESDAY...Mostly clear. Isolated showers. Lows 50 to 55. Highs 76 to 81. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 50 to 55. Highs 78 to 83. Light winds. .THURSDAY...Mostly clear. Lows 52 to 57. Highs 80 to 85. .FRIDAY...Sunny. Highs 80 to 85. $$ MTZ131-192215- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. Patchy fog in the morning. 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.......63-68. * 24 hr trend.........20 degrees cooler. * Min humidity..........79-84 percent. * 24 hr trend.........57 percent wetter. * Wind (20 ft) * Slope/valley.........North winds 5 to 10 mph. * Ridgetop.............Southeast 5 to 10 mph. * Chance of lightning...39 percent. * CWR...................90 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......47-52. * 24 hr trend.........6 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........East winds 5 to 15 mph. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...32 percent. * CWR...................90 percent. .SUNDAY... * Sky/weather...........Patchy fog in the morning. Cloudy with rain showers. * Max temperature.......60-65. * 24 hr trend.........3 degrees cooler. * Min humidity..........71-76 percent. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Slope/valley.........North winds 5 to 15 mph. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...10 percent. * CWR...................80 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Cloudy. Scattered showers. Lows 43 to 48. East winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 44 to 49. Highs 68 to 73. Southeast winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 49 to 54. Highs 77 to 82. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 48 to 53. Highs 77 to 82. Southeast winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 50 to 55. Highs 81 to 86. .FRIDAY...Mostly sunny. Highs 81 to 86. $$ MTZ132-192215- Custer County- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Patchy fog in the morning. Cloudy with rain showers and isolated thunderstorms. Some thunderstorms may produce heavy rainfall. * Max temperature.......61-66. * 24 hr trend.........21 degrees cooler. * Min humidity..........81-86 percent. * 24 hr trend.........47 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...18 percent. * CWR...................90 percent. .TONIGHT... * Sky/weather...........Cloudy with rain showers and isolated thunderstorms. Patchy fog overnight. Some thunderstorms may produce heavy rainfall. * Min temperature.......49-54. * 24 hr trend.........6 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............East winds 10 to 20 mph. * Chance of lightning...16 percent. * CWR...................90 percent. .SUNDAY... * Sky/weather...........Patchy fog in the morning. Cloudy with rain showers. * Max temperature.......57-62. * 24 hr trend.........4 degrees cooler. * Min humidity..........84-89 percent. * 24 hr trend.........3 percent wetter. * Wind (20 ft) * Plains...............East winds 10 to 20 mph. * Chance of lightning...14 percent. * CWR...................80 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Scattered showers. Lows 46 to 51. Southeast winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 47 to 52. Highs 64 to 69. Southeast winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 51 to 56. Highs 73 to 78. Southeast winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Isolated showers and thunderstorms. Lows 52 to 57. Highs 76 to 81. Southeast winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 54 to 59. Highs 79 to 84. .FRIDAY...Sunny. Highs 78 to 83. $$ MTZ133-192215- Sioux Ranger District Custer National Forest- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Cloudy. Patchy fog in the morning. Rain showers and isolated thunderstorms in the morning, then numerous rain showers in the afternoon. * Max temperature.......62-67. * 24 hr trend.........14 degrees cooler. * Min humidity..........82-87 percent. * 24 hr trend.........36 percent wetter. * Wind (20 ft) * Plains...............East winds 5 to 15 mph. * Chance of lightning...15 percent. * CWR...................70 percent. .TONIGHT... * Sky/weather...........Cloudy. Rain showers and isolated thunderstorms in the evening, then rain showers overnight. * Min temperature.......48-53. * 24 hr trend.........6 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............East winds 10 to 20 mph. * Chance of lightning...15 percent. * CWR...................80 percent. .SUNDAY... * Sky/weather...........Cloudy with rain showers. * Max temperature.......56-61. * 24 hr trend.........6 degrees cooler. * Min humidity..........91-96 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Plains...............East winds 10 to 20 mph with gusts to around 30 mph. * Chance of lightning...13 percent. * CWR...................100 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Cloudy. Numerous showers. Lows 45 to 50. East winds 10 to 20 mph. .MONDAY...Mostly cloudy. Lows 45 to 50. Highs 62 to 67. Southeast winds 10 to 20 mph with gusts to around 30 mph. .TUESDAY...Partly cloudy. Lows 49 to 54. Highs 71 to 76. Southeast winds 10 to 20 mph with gusts to around 30 mph. .WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 50 to 55. Highs 75 to 80. Southeast winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 51 to 56. Highs 78 to 83. .FRIDAY...Mostly sunny. Highs 78 to 83. $$ WYZ274-192215- Sheridan County- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Mostly 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.......61-66. * 24 hr trend.........21 degrees cooler. * Min humidity..........82-87 percent. * 24 hr trend.........57 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...39 percent. * CWR...................90 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......42-47. * 24 hr trend.........8 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...26 percent. * CWR...................80 percent. .SUNDAY... * Sky/weather...........Cloudy. Patchy fog in the morning. Numerous 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.......61-66. * 24 hr trend.........Unchanged. * Min humidity..........69-74 percent. * 24 hr trend.........13 percent drier. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 15 mph. * Chance of lightning...18 percent. * CWR...................70 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Areas of fog. Scattered showers. Lows 40 to 45. Northwest winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 40 to 45. Highs 69 to 74. Southeast winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 44 to 49. Highs 75 to 80. Light winds. .WEDNESDAY...Mostly clear. Lows 44 to 49. Highs 77 to 82. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 45 to 50. Highs 80 to 85. .FRIDAY...Mostly sunny. Highs 81 to 86. $$ WYZ284-192215- Bighorn National Forest- 221 AM MDT Sat Sep 19 2026 .Today... * Sky/weather...........Mostly 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.......50-55. * 24 hr trend.........13 degrees cooler. * Min humidity..........79-84 percent. * 24 hr trend.........42 percent wetter. * Wind (20 ft) * At Burgess Jct.......Northwest winds 5 to 10 mph. * Chance of lightning...45 percent. * CWR...................80 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Rain showers and scattered thunderstorms in the evening, then rain showers overnight. Patchy fog through the night. Some thunderstorms may produce heavy rainfall in the evening. * Min temperature.......32-37. * 24 hr trend.........7 degrees cooler. * Max humidity..........100 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * At Burgess Jct.......Northwest winds 5 to 10 mph. * Chance of lightning...25 percent. * CWR...................80 percent. .SUNDAY... * 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.......47-52. * 24 hr trend.........3 degrees cooler. * Min humidity..........72-77 percent. * 24 hr trend.........7 percent drier. * Wind (20 ft) * At Burgess Jct.......Northwest winds 5 to 15 mph. * Chance of lightning...16 percent. * CWR...................70 percent. .Forecast days 3 through 7...... .SUNDAY NIGHT...Mostly cloudy. Scattered showers. Lows 29 to 34. West winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 32 to 37. Highs 55 to 60. South winds 5 to 10 mph. .TUESDAY...Mostly clear. Isolated showers. Lows 37 to 42. Highs 62 to 67. South winds 5 to 10 mph. .WEDNESDAY...Partly cloudy. Isolated showers. Lows 37 to 42. Highs 62 to 67. Southwest winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 39 to 44. Highs 65 to 70. .FRIDAY...Mostly sunny. Highs 65 to 70. $$ weather.gov/billings