59401 Weather (Great Falls, MT)

Weather forecast for: Great Falls International Airport MT

Last Update: 12:31 pm MDT Aug 29, 2026

This Afternoon: Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Patchy smoke before 2pm. Partly sunny, with a high near 80. South southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

Tonight: Showers and thunderstorms likely, then showers after 3am. Low around 50. West wind 6 to 8 mph becoming south in the evening. Chance of precipitation is 90%.

Sunday: A 50 percent chance of showers, mainly before 8am. Patchy smoke between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 65. Breezy, with a southwest wind 7 to 12 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph.

Sunday Night: Patchy smoke after 5am. Mostly clear, with a low around 45. Southwest wind 11 to 18 mph, with gusts as high as 32 mph.

Monday: Patchy smoke before 7am. Sunny, with a high near 77. Southwest wind 6 to 9 mph.

Monday Night: Mostly clear, with a low around 48. West wind 5 to 8 mph becoming east in the evening.

Tuesday: Sunny, with a high near 85. South southwest wind around 6 mph.

Tuesday Night: A slight chance of showers before midnight. Mostly cloudy, with a low around 54. Southeast wind 8 to 13 mph becoming south southwest after midnight. Winds could gust as high as 20 mph.

Wednesday: A chance of showers after noon. Partly sunny, with a high near 80.

Wednesday Night: A slight chance of showers before midnight. Mostly cloudy, with a low around 50.

Thursday: Mostly sunny, with a high near 77.

Thursday Night: A slight chance of showers. Partly cloudy, with a low around 47.

Friday: A slight chance of showers. Mostly sunny, with a high near 75.