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St. Marie, MT Weather Forecast
St. Marie, MT Weather Forecast Date: 541 PM MDT Wed Sep 09 2026
The area/counties/county of: Central And Southern Valley, including the cities of: Glasgow, Fort Peck, Hinsdale, and Frazer.or toggle through each period.
Tonight... Mostly clear. Lows around 50. Southwest wind 5 to 10 mph, becoming south after midnight.
Thursday... Sunny. Highs in the mid 80s. Southwest wind 10 to 15 mph, becoming west 15 to 20 mph in the afternoon.
Thursday Night... Partly cloudy in the evening, then cloudy with a chance of showers after midnight. Lows in the upper 40s. North wind 10 to 15 mph. Chance of rain 30%.
Friday... Showers likely in the morning, then partly sunny in the afternoon. Cooler with highs in the mid 60s. Northwest wind 10 to 15 mph. Chance of rain 60%.
Friday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows around 40. Northwest wind 10 to 15 mph.
Saturday... Mostly cloudy. Highs in the lower 60s.
Saturday Night... A chance of showers. Lows around 40.
Sunday... Showers likely with a slight chance of thunderstorms. Breezy with highs in the upper 50s.
Sunday Night... Showers. Lows in the lower 40s.
Monday... A chance of showers. Highs in the lower 60s.
Monday Night... Mostly clear. Lows in the upper 30s.
Tuesday... Partly cloudy. Highs in the upper 60s. Lows in the lower 40s.
Tuesday Night... Partly cloudy. Highs in the upper 60s. Lows in the lower 40s.
POP = Probability of Precipitation
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