| NWS Forecast for: St Mary MT Issued by: National Weather Service Great Falls, MT Last Update: 9:47 pm MST Dec 8, 2025 | |
Tonight: Rain, mainly before 5am. Low around 34. Breezy, with a west southwest wind around 26 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible. Tuesday: A chance of rain and snow before 7am, then a chance of snow between 7am and 10am. Partly sunny, with a temperature rising to near 40 by 10am, then falling to around 35 during the remainder of the day. Breezy, with a west wind 14 to 22 mph, with gusts as high as 47 mph. Chance of precipitation is 30%. Little or no snow accumulation expected. Tuesday Night: Snow, mainly after 11pm. Low around 30. South southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible. Wednesday: Rain and snow before 11am, then rain likely between 11am and 2pm, then rain likely, possibly mixed with snow after 2pm. High near 45. West wind 13 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible. Wednesday Night: Rain and snow likely, becoming all snow after 2am. Mostly cloudy, with a low around 25. West southwest wind 10 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible. Thursday: Snow. High near 34. West wind 7 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible. Thursday Night: Snow likely. Mostly cloudy, with a low around 3. North northeast wind around 6 mph becoming south southeast after midnight. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible. Friday: Snow likely, mainly before 11am. Mostly cloudy, with a high near 34. Southwest wind 5 to 8 mph. Friday Night: A chance of snow. Mostly cloudy, with a low around 13. Saturday: A chance of snow. Mostly cloudy, with a high near 38. Saturday Night: A chance of snow. Mostly cloudy, with a low around 21. Sunday: A chance of snow. Partly sunny, with a high near 41. Sunday Night: A chance of snow. Mostly cloudy, with a low around 28. Monday: A chance of snow. Partly sunny, with a high near 41. | |
| St Mary MT 48.74°N 113.44°W (Elev. 4554 ft) | |
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