| NWS Forecast for: St Mary MT Issued by: National Weather Service Great Falls, MT Last Update: 4:51 pm MDT Oct 11, 2026 |  |
Tonight: Snow, mainly before 4am. Low around -7. North northeast wind 8 to 14 km/h, with gusts as high as 29 km/h. Chance of precipitation is 90%. Total nighttime snow accumulation of 5 to 9 centimeters possible. Columbus Day: A 30 percent chance of snow, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 3. North northwest wind 8 to 13 km/h becoming south southwest in the morning. New snow accumulation of less than a half centimeter possible. Monday Night: Partly cloudy, with a low around -4. West southwest wind 13 to 18 km/h, with gusts as high as 32 km/h. Tuesday: Sunny, with a high near 7. West southwest wind 8 to 14 km/h. Tuesday Night: Mostly clear, with a low around -3. Southwest wind 5 to 11 km/h. Wednesday: Mostly sunny, with a high near 12. West southwest wind 14 to 18 km/h, with gusts as high as 35 km/h. Wednesday Night: Partly cloudy, with a low around -2. West southwest wind 11 to 16 km/h decreasing to 5 to 10 km/h after midnight. Winds could gust as high as 37 km/h. Thursday: Mostly sunny, with a high near 12. Calm wind becoming south 5 to 8 km/h in the afternoon. Thursday Night: Partly cloudy, with a low around -1. Friday: Sunny, with a high near 16. Friday Night: Partly cloudy, with a low around 6. Saturday: Mostly sunny, with a high near 16. Saturday Night: Partly cloudy, with a low around 2. Sunday: Mostly sunny, with a high near 14. | |
| St Mary MT 48.74°N 113.44°W (Elev. 4554 m) | |
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