Weather forecast for: Plains MT
Last Update: 2:01 pm MDT Sep 23, 2026
Tonight: Partly cloudy, with a low around 45. Light and variable wind.
Thursday: Mostly sunny, with a high near 87. Calm wind.
Thursday Night: Partly cloudy, with a low around 49. Calm wind.
Friday: A 40 percent chance of rain after noon. Partly sunny, with a high near 76. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.
Friday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 41. Southwest wind 5 to 9 mph, with gusts as high as 23 mph.
Saturday: Partly sunny, with a high near 64.
Saturday Night: Partly cloudy, with a low around 37.
Sunday: Partly sunny, with a high near 66.
Sunday Night: Mostly cloudy, with a low around 39.
Monday: Mostly sunny, with a high near 65.
Monday Night: Partly cloudy, with a low around 39.
Tuesday: Mostly sunny, with a high near 67.
Tuesday Night: A slight chance of rain. Partly cloudy, with a low around 41.
Wednesday: Mostly sunny, with a high near 69.