Weather forecast for: Grass Range MT
Last Update: 9:22 pm MDT Sep 12, 2026
Tonight: Partly cloudy, with a low around 41. East wind 5 to 7 mph becoming calm in the evening.
Sunday: Sunny, with a high near 73. Light south southeast wind becoming east southeast 16 to 21 mph in the morning. Winds could gust as high as 30 mph.
Sunday Night: Partly cloudy, with a low around 48. Breezy, with a southeast wind 8 to 13 mph becoming west 20 to 25 mph in the evening. Winds could gust as high as 34 mph.
Monday: Mostly sunny, with a high near 62. Windy, with a west northwest wind 20 to 25 mph increasing to 29 to 34 mph in the afternoon. Winds could gust as high as 45 mph.
Monday Night: Mostly clear, with a low around 43. Breezy, with a west northwest wind 19 to 29 mph decreasing to 7 to 17 mph after midnight. Winds could gust as high as 38 mph.
Tuesday: Mostly sunny, with a high near 66. West southwest wind 5 to 10 mph becoming east southeast in the afternoon.
Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 46. East wind 5 to 11 mph becoming north northwest after midnight. Winds could gust as high as 18 mph.
Wednesday: Partly sunny, with a high near 65. North northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday Night: Mostly clear, with a low around 46.
Thursday: Sunny, with a high near 75.
Thursday Night: Mostly clear, with a low around 49.
Friday: A slight chance of showers. Sunny, with a high near 74.
Friday Night: A slight chance of showers. Mostly clear, with a low around 51.
Saturday: Mostly sunny, with a high near 78.
WeatherWorld.com
