Weather forecast for: Grass Range MT
Last Update: 10:51 pm MDT Sep 17, 2026
Overnight: Partly cloudy, with a low around 55. West southwest wind around 6 mph.
Friday: Mostly cloudy, then gradually becoming sunny, with a high near 76. West wind 6 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 18 mph.
Friday Night: A chance of showers and thunderstorms before 2am, then showers likely between 2am and 3am, then rain likely after 3am. Cloudy, with a low around 53. North northeast wind 5 to 10 mph becoming northwest in the evening. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday: Rain likely, then showers and possibly a thunderstorm after noon. High near 59. North northeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday Night: Showers and possibly a thunderstorm before 9pm, then rain after 9pm. Low around 51. Northeast wind 6 to 10 mph. Chance of precipitation is 90%.
Sunday: Rain likely, mainly before noon. Mostly cloudy, with a high near 69. North northeast wind 6 to 8 mph. Chance of precipitation is 60%.
Sunday Night: Partly cloudy, with a low around 50. East wind 5 to 8 mph becoming light and variable after midnight.
Monday: Mostly sunny, with a high near 74. Light south wind becoming south southeast 5 to 9 mph in the morning.
Monday Night: Mostly clear, with a low around 53.
Tuesday: A slight chance of rain after noon. Mostly sunny, with a high near 78.
Tuesday Night: Mostly clear, with a low around 52.
Wednesday: Sunny, with a high near 76.
Wednesday Night: Partly cloudy, with a low around 52.
Thursday: Mostly sunny, with a high near 76.
WeatherWorld.com
