Weather forecast for: Sun River MT
Last Update: 6:01 pm MDT Sep 8, 2026
Tonight: Mostly clear, with a low around 41. Calm wind becoming west southwest around 6 mph after midnight.
Wednesday: Sunny, with a high near 76. Southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night: Partly cloudy, with a low around 50. Southwest wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 28 mph.
Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 81. Breezy, with a southwest wind 13 to 18 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 38 mph.
Thursday Night: Showers likely after midnight. Mostly cloudy, with a low around 45. West southwest wind 8 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Friday: Showers likely and possibly a thunderstorm before 9am, then showers likely between 9am and noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 59. North wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Friday Night: Mostly cloudy, with a low around 39. North northeast wind 6 to 9 mph.
Saturday: Mostly cloudy, with a high near 58. Northeast wind 6 to 15 mph, with gusts as high as 25 mph.
Saturday Night: A chance of showers. Mostly cloudy, with a low around 37. Breezy.
Sunday: Showers likely. Mostly cloudy, with a high near 54.
Sunday Night: A chance of showers. Mostly cloudy, with a low around 35.
Monday: Sunny, with a high near 66.
Monday Night: Mostly clear, with a low around 37.
Tuesday: A slight chance of showers. Mostly sunny, with a high near 64.
WeatherWorld.com
