Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
867 FNUS55 KBYZ 180719 FWFBYZ Fire Weather Planning Forecast for SCen and SErn Montana National Weather Service Billings MT 119 AM MDT Tue Aug 18 2026 .DISCUSSION... Showers and thunderstorms are expected this afternoon and evening. Isolated severe storms are possible as well, with strong wind gusts (60+ mph), hail, and heavy rain being the main concerns. Warmer and drier conditions are expected Wednesday and Thursday with temperatures in the upper 80s to low 90sF as well as minimum relative humidity values in the teens to low 20s percent. Matos MTZ123-182230- Gallatin National Forest- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......74-83 at 5000 feet...62-72 at 7000 feet. * 24 hr trend.........2 degrees cooler. * Min humidity..........27-32 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph in the morning shifting to the northwest in the afternoon. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...32 percent. * CWR...................10 percent. .TONIGHT... * Sky/weather...........Partly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......47-57 at 5000 feet...42-52 at 7000 feet. * 24 hr trend.........3 degrees cooler. * Max humidity..........59-64 percent. * 24 hr trend.........2 percent drier. * Wind (20 ft) * Slope/valley.........Southeast winds 5 to 10 mph. * Ridgetop.............Southeast 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......78-88 at 5000 feet...66-76 at 7000 feet. * 24 hr trend.........3 degrees warmer. * Min humidity..........15-25 percent at 5000 feet...17-27 percent at 7000 feet. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Slope/valley.........South winds 5 to 10 mph in the morning shifting to the west in the afternoon. * Ridgetop.............West 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 49 to 59. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 52 to 62. Highs 83 to 93. Southwest winds 5 to 10 mph. .FRIDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 53 to 63. Highs 83 to 93. South winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 52 to 62. Highs 81 to 90. South winds 5 to 10 mph. .SUNDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 50 to 60. Highs 78 to 87. .MONDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 78 to 87. $$ MTZ124-182230- Wheatland County/Sweet Grass County- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Mostly sunny. Isolated rain showers in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......79-84. * 24 hr trend.........1 degree cooler. * Min humidity..........21-26 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...26 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy with scattered rain showers and isolated thunderstorms in the evening, then mostly clear overnight. * Min temperature.......50-55. * 24 hr trend.........Unchanged. * Max humidity..........72-77 percent. * 24 hr trend.........7 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......82-87. * 24 hr trend.........3 degrees warmer. * Min humidity..........13-18 percent. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Plains...............West winds 10 to 20 mph. Gusts up to 30 mph in the afternoon. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 49 to 54. West winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 53 to 58. Highs 87 to 92. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 56 to 61. Highs 84 to 89. Southeast winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 54 to 59. Highs 85 to 90. Southwest winds 5 to 15 mph. .SUNDAY...Partly cloudy. Isolated showers. Lows 52 to 57. Highs 83 to 88. .MONDAY...Sunny. Highs 83 to 88. $$ MTZ125-182230- Stillwater County- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......79-84. * 24 hr trend.........1 degree cooler. * Min humidity..........25-30 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...34 percent. * CWR...................10 percent. .TONIGHT... * Sky/weather...........Partly cloudy. Isolated showers and thunderstorms in the evening. * Min temperature.......52-57. * 24 hr trend.........3 degrees cooler. * Max humidity..........62-67 percent. * 24 hr trend.........Unchanged. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......86-91. * 24 hr trend.........7 degrees warmer. * Min humidity..........13-18 percent. * 24 hr trend.........12 percent drier. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 53 to 58. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 57 to 62. Highs 90 to 95. West winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers. Lows 60 to 65. Highs 87 to 92. East winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 58 to 63. Highs 88 to 93. Southwest winds 5 to 10 mph. .SUNDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 55 to 60. Highs 85 to 90. .MONDAY...Mostly sunny. Scattered showers and isolated thunderstorms. Highs 83 to 88. $$ MTZ126-182230- Beartooth Ranger District Custer National Forest- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Mostly sunny with isolated rain showers in the morning, then mostly cloudy with numerous rain showers and scattered thunderstorms in the afternoon. * Max temperature.......72-80 at 5000 feet...64-74 at 7000 feet. * 24 hr trend.........1 degree cooler. * Min humidity..........29-39 percent at 5000 feet...32-42 percent at 7000 feet. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........Northwest winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...39 percent. * CWR...................30 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......53-59 at 5000 feet...45-55 at 7000 feet. * 24 hr trend.........2 degrees cooler. * Max humidity..........59-64 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Slope/valley.........West winds 5 to 15 mph. * Ridgetop.............West 5 to 15 mph. * Chance of lightning...22 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......76-86 at 5000 feet...69-79 at 7000 feet. * 24 hr trend.........4 degrees warmer. * Min humidity..........17-27 percent at 5000 feet...19-29 percent at 7000 feet. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Slope/valley.........North winds 5 to 15 mph. * Ridgetop.............North 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Partly cloudy. Lows 54 to 63. West winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 58 to 66. Highs 81 to 91. West winds 5 to 10 mph. .FRIDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 60 to 68. Highs 82 to 90. West winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 58 to 66. Highs 81 to 91. Southwest winds 5 to 15 mph. .SUNDAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 56 to 64. Highs 79 to 87. .MONDAY...Mostly sunny. Scattered showers and isolated thunderstorms. Highs 78 to 86. $$ MTZ127-182230- Golden Valley County/Musselshell county- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Mostly sunny. Isolated rain showers in the morning, then scattered showers and thunderstorms in the afternoon. * Max temperature.......77-82. * 24 hr trend.........4 degrees cooler. * Min humidity..........28-33 percent. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...25 percent. * CWR...................20 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......56-61. * 24 hr trend.........1 degree cooler. * Max humidity..........63-68 percent. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. Patchy smoke in the afternoon. * Max temperature.......80-85. * 24 hr trend.........3 degrees warmer. * Min humidity..........18-23 percent. * 24 hr trend.........10 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Partly cloudy. Patchy smoke. Lows 57 to 62. North winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 60 to 65. Highs 84 to 89. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Lows 63 to 68. Highs 81 to 86. East winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 62 to 67. Highs 84 to 89. Southeast winds 5 to 15 mph. .SUNDAY...Partly cloudy. Isolated showers. Lows 59 to 64. Highs 81 to 86. .MONDAY...Mostly sunny. Highs 80 to 85. $$ MTZ128-182230- Yellowstone County- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Mostly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......82-87. * 24 hr trend.........3 degrees cooler. * Min humidity..........25-30 percent. * 24 hr trend.........6 percent wetter. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...22 percent. * CWR...................30 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......57-62. * 24 hr trend.........1 degree cooler. * Max humidity..........70-75 percent. * 24 hr trend.........4 percent drier. * Wind (20 ft) * Plains...............Southwest winds 5 to 15 mph. * Chance of lightning...15 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......86-91. * 24 hr trend.........4 degrees warmer. * Min humidity..........14-19 percent. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 57 to 62. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 60 to 65. Highs 91 to 96. Northwest winds 5 to 15 mph. .FRIDAY...Partly cloudy. Lows 63 to 68. Highs 88 to 93. Northeast winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 61 to 66. Highs 90 to 95. Southwest winds 5 to 10 mph. .SUNDAY...Partly cloudy. Isolated showers. Lows 60 to 65. Highs 87 to 92. .MONDAY...Mostly sunny. Highs 86 to 91. $$ MTZ129-182230- Crow Indian Reservation/Bighorn Canyon Rec Area- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Partly sunny. Scattered showers and thunderstorms in the afternoon. * Max temperature.......72-82 at 5000 feet...65-72 at 7000 feet. * 24 hr trend.........6 degrees cooler. * Min humidity..........29-39 percent at 5000 feet...33-42 percent at 7000 feet. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph. * Ridgetop.............Northwest 5 to 10 mph. * Chance of lightning...25 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......55-60 at 5000 feet...51-56 at 7000 feet. * 24 hr trend.........2 degrees cooler. * Max humidity..........60-70 percent at 5000 feet...55-65 percent at 7000 feet. * 24 hr trend.........Unchanged. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph. * Ridgetop.............South 5 to 10 mph. * Chance of lightning...21 percent. * CWR...................10 percent. .WEDNESDAY... * Sky/weather...........Mostly sunny. * Max temperature.......77-87 at 5000 feet...68-76 at 7000 feet. * 24 hr trend.........4 degrees warmer. * Min humidity..........17-25 percent at 5000 feet...21-28 percent at 7000 feet. * 24 hr trend.........10 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 57 to 63. Southeast winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 59 to 66. Highs 82 to 92. South winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 62 to 68. Highs 82 to 92. East winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 61 to 66. Highs 82 to 92. South winds 5 to 10 mph. .SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 59 to 64. Highs 78 to 88. .MONDAY...Sunny. Highs 77 to 87. $$ MTZ130-182230- Northern Rosebud/Northern Treasure Counties- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Mostly sunny. Isolated showers and thunderstorms in the afternoon. Patchy smoke in the afternoon. * Max temperature.......83-88. * 24 hr trend.........4 degrees cooler. * Min humidity..........28-33 percent. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Plains...............Light winds in the morning becoming north 5 to 10 mph in the afternoon. * Chance of lightning...16 percent. * CWR...................Less than 10 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. Patchy smoke in the evening. * Min temperature.......56-61. * 24 hr trend.........1 degree cooler. * Max humidity..........80-85 percent. * 24 hr trend.........1 percent drier. * Wind (20 ft) * Plains...............Southwest winds 5 to 10 mph. * Chance of lightning...20 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Mostly sunny. * Max temperature.......87-92. * 24 hr trend.........4 degrees warmer. * Min humidity..........17-22 percent. * 24 hr trend.........11 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...1 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Patchy smoke. Lows 57 to 62. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 60 to 65. Highs 91 to 96. North winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 63 to 68. Highs 88 to 93. East winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 63 to 68. Highs 91 to 96. Southeast winds 5 to 15 mph. .SUNDAY...Partly cloudy. Isolated showers. Lows 60 to 65. Highs 88 to 93. .MONDAY...Mostly sunny. Highs 88 to 93. $$ MTZ131-182230- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Partly sunny. Scattered rain showers and isolated thunderstorms in the afternoon. * Max temperature.......81-86. * 24 hr trend.........7 degrees cooler. * Min humidity..........23-28 percent. * 24 hr trend.........8 percent wetter. * Wind (20 ft) * Slope/valley.........West winds 5 to 10 mph in the morning shifting to the north in the afternoon. * Ridgetop.............North 5 to 10 mph. * Chance of lightning...24 percent. * CWR...................20 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Numerous rain showers and scattered thunderstorms in the evening. * Min temperature.......53-58. * 24 hr trend.........2 degrees cooler. * Max humidity..........82-87 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph. * Ridgetop.............Southwest 5 to 10 mph. * Chance of lightning...25 percent. * CWR...................30 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......85-90. * 24 hr trend.........4 degrees warmer. * Min humidity..........15-20 percent. * 24 hr trend.........8 percent drier. * Wind (20 ft) * Slope/valley.........West winds 5 to 15 mph. * Ridgetop.............Northwest 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 54 to 59. Southeast winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 58 to 63. Highs 93 to 98. West winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 62 to 67. Highs 89 to 94. East winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 61 to 66. Highs 90 to 95. Southeast winds 5 to 15 mph. .SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 58 to 63. Highs 87 to 92. .MONDAY...Mostly sunny. Highs 87 to 92. $$ MTZ132-182230- Custer County- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Sunny. * Max temperature.......79-84. * 24 hr trend.........7 degrees cooler. * Min humidity..........26-31 percent. * 24 hr trend.........3 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...2 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Partly cloudy. Isolated showers and thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......56-61. * 24 hr trend.........Unchanged. * Max humidity..........80-85 percent. * 24 hr trend.........1 percent wetter. * Wind (20 ft) * Plains...............North winds 5 to 10 mph in the evening shifting to the southwest overnight. * Chance of lightning...16 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Mostly sunny. Patchy smoke in the afternoon. * Max temperature.......83-88. * 24 hr trend.........4 degrees warmer. * Min humidity..........21-26 percent. * 24 hr trend.........5 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...0 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Patchy smoke. Lows 56 to 61. West winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 58 to 63. Highs 87 to 92. North winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 61 to 66. Highs 84 to 89. East winds 5 to 15 mph. .SATURDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 62 to 67. Highs 85 to 90. Southeast winds 10 to 20 mph with gusts to around 30 mph. .SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 61 to 66. Highs 85 to 90. .MONDAY...Mostly sunny. Highs 85 to 90. $$ MTZ133-182230- Sioux Ranger District Custer National Forest- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Mostly sunny. * Max temperature.......81-86. * 24 hr trend.........7 degrees cooler. * Min humidity..........25-30 percent. * 24 hr trend.........7 percent wetter. * Wind (20 ft) * Plains...............Northwest winds 5 to 10 mph. * Chance of lightning...6 percent. * CWR...................Zero. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening, then isolated rain showers overnight. * Min temperature.......55-60. * 24 hr trend.........Unchanged. * Max humidity..........85-90 percent. * 24 hr trend.........4 percent wetter. * Wind (20 ft) * Plains...............West winds 5 to 10 mph. * Chance of lightning...19 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Mostly sunny. * Max temperature.......85-90. * 24 hr trend.........4 degrees warmer. * Min humidity..........22-27 percent. * 24 hr trend.........3 percent drier. * Wind (20 ft) * Plains...............West winds 5 to 15 mph. * Chance of lightning...4 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 55 to 60. Northwest winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 58 to 63. Highs 89 to 94. North winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 58 to 63. Highs 86 to 91. East winds 5 to 15 mph. .SATURDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 59 to 64. Highs 85 to 90. Southeast winds 15 to 25 mph with gusts to around 35 mph. .SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 59 to 64. Highs 87 to 92. .MONDAY...Mostly sunny. Highs 87 to 92. $$ WYZ274-182230- Sheridan County- 119 AM MDT Tue Aug 18 2026 .Today... * Sky/weather...........Partly sunny. Numerous rain showers and scattered thunderstorms in the afternoon. * Max temperature.......78-83. * 24 hr trend.........7 degrees cooler. * Min humidity..........28-33 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming northeast 5 to 10 mph in the afternoon. * Ridgetop.............Northeast 5 to 10 mph. * Chance of lightning...32 percent. * CWR...................20 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Scattered rain showers and isolated thunderstorms in the evening. * Min temperature.......50-55. * 24 hr trend.........2 degrees cooler. * Max humidity..........85-90 percent. * 24 hr trend.........3 percent wetter. * Wind (20 ft) * Slope/valley.........Southwest winds 5 to 10 mph. * Ridgetop.............Light winds. * Chance of lightning...24 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......83-88. * 24 hr trend.........5 degrees warmer. * Min humidity..........18-23 percent. * 24 hr trend.........10 percent drier. * Wind (20 ft) * Slope/valley.........Light winds in the morning becoming north 5 to 15 mph in the afternoon. * Ridgetop.............North 5 to 15 mph. * Chance of lightning...1 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 51 to 56. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 55 to 60. Highs 89 to 94. West winds 5 to 10 mph. .FRIDAY...Partly cloudy. Lows 58 to 63. Highs 89 to 94. East winds 5 to 10 mph. .SATURDAY...Mostly cloudy. Isolated showers and thunderstorms. Lows 57 to 62. Highs 89 to 94. South winds 5 to 10 mph. .SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 54 to 59. Highs 86 to 91. .MONDAY...Mostly sunny. Isolated showers and thunderstorms. Highs 85 to 90. $$ WYZ284-182230- Bighorn National Forest- 119 AM MDT Tue Aug 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.......64-69. * 24 hr trend.........3 degrees cooler. * Min humidity..........34-39 percent. * 24 hr trend.........9 percent wetter. * Wind (20 ft) * At Burgess Jct.......West winds 5 to 15 mph. * Chance of lightning...33 percent. * CWR...................50 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Numerous rain showers and isolated thunderstorms in the evening. * Min temperature.......40-45. * 24 hr trend.........2 degrees cooler. * Max humidity..........88-93 percent. * 24 hr trend.........5 percent wetter. * Wind (20 ft) * At Burgess Jct.......Southwest winds 5 to 15 mph. * Chance of lightning...22 percent. * CWR...................Less than 10 percent. .WEDNESDAY... * Sky/weather...........Sunny. * Max temperature.......67-72. * 24 hr trend.........3 degrees warmer. * Min humidity..........24-29 percent. * 24 hr trend.........10 percent drier. * Wind (20 ft) * At Burgess Jct.......Northwest winds 10 to 20 mph. * Chance of lightning...1 percent. * CWR...................Zero. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows 44 to 49. West winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 47 to 52. Highs 72 to 77. West winds 5 to 15 mph. .FRIDAY...Partly cloudy. Lows 49 to 54. Highs 73 to 78. Southwest winds 5 to 15 mph. .SATURDAY...Mostly cloudy. Scattered showers and isolated thunderstorms. Lows 47 to 52. Highs 73 to 78. Southwest winds 5 to 15 mph. .SUNDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 45 to 50. Highs 70 to 75. .MONDAY...Mostly sunny. Scattered showers and isolated thunderstorms. Highs 69 to 74. $$ weather.gov/billings