| NWS Forecast for: St Mary MT Issued by: National Weather Service Great Falls, MT Last Update: 12:32 am MDT Oct 11, 2026 | |
Overnight: Snow. Low around -6. North northeast wind 14 to 16 km/h, with gusts as high as 39 km/h. Chance of precipitation is 100%. Total nighttime snow accumulation of 9 to 13 centimeters possible. Sunday: Snow. High near -2. North northeast wind 14 to 18 km/h, with gusts as high as 39 km/h. Chance of precipitation is 100%. New snow accumulation of 10 to 14 centimeters possible. Sunday Night: Snow. Low around -8. North northeast wind 8 to 13 km/h becoming light north after midnight. Winds could gust as high as 29 km/h. Chance of precipitation is 90%. New snow accumulation of 2 to 4 centimeters possible. Columbus Day: Mostly cloudy, with a high near 6. Calm wind becoming southwest 5 to 8 km/h in the afternoon. Monday Night: Partly cloudy, with a low around -6. West southwest wind 8 to 13 km/h, with gusts as high as 32 km/h. Tuesday: Sunny, with a high near 9. West southwest wind 8 to 11 km/h. Tuesday Night: Mostly clear, with a low around -3. Southwest wind 5 to 13 km/h. Wednesday: Sunny, with a high near 9. 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. Thursday: Mostly sunny, with a high near 10. Thursday Night: Partly cloudy, with a low around -2. Friday: Sunny, with a high near 14. Friday Night: Partly cloudy, with a low around 3. Saturday: Mostly sunny, with a high near 14. | |
| St Mary MT 48.74°N 113.44°W (Elev. 4554 m) | |
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