Weather forecast for: Roundup MT
Last Update: 12:32 pm MDT Oct 29, 2026
Tonight: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 29. North northeast wind 3 to 8 mph.
Friday: Patchy fog before noon. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 49. Light east wind.
Friday Night: Areas of fog after 9pm. Otherwise, mostly cloudy, with a low around 30. Calm wind.
Saturday: Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Calm wind.
Saturday Night: Mostly cloudy, with a low around 33. Light and variable wind.
Sunday: A 20 percent chance of showers after noon. Partly sunny, with a high near 55. Calm wind becoming east northeast around 6 mph in the afternoon.
Sunday Night: Showers likely. Cloudy, with a low around 37. Northeast wind 5 to 9 mph becoming north northwest after midnight. Chance of precipitation is 70%.
Monday: A 50 percent chance of showers. Mostly cloudy, with a high near 54. Northwest wind 11 to 14 mph.
Monday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 32. Northwest wind around 6 mph becoming calm.
Tuesday: Mostly sunny, with a high near 58. West southwest wind 6 to 9 mph.
Tuesday Night: Mostly cloudy, with a low around 31. West wind around 6 mph becoming calm in the evening.
Wednesday: Mostly sunny, with a high near 53. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night: Partly cloudy, with a low around 27. East northeast wind around 5 mph becoming calm in the evening.
Thursday: Mostly sunny, with a high near 57. Calm wind becoming southwest 5 to 7 mph in the afternoon.