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Sun River, MT Weather Forecast
Sun River, MT Weather Forecast Date: 1232 AM MDT Mon Sep 07 2026
The area/counties/county of: Cascade County Below 5000ft, including the city of Great Falls.or toggle through each period.
Rest of Tonight... Windy. Rain showers and chance of thunderstorms. Highs in the lower 60s. Lows 44 to 52. Southwest winds up to 30 mph with gusts to around 45 mph. Chance of precipitation near 100%.
Tuesday... Breezy. Rain likely. Highs in the lower 60s. West winds 15 to 25 mph. Chance of rain 70%.
Tuesday Night... Mostly cloudy in the evening then clearing. Lows in the lower 40s. Southwest winds 5 to 15 mph.
Wednesday... Breezy, warmer, sunny. Highs in the mid 70s. Southwest winds 10 to 15 mph increasing to 15 to 25 mph in the afternoon.
Wednesday Night... Windy. Mostly clear. Lows in the lower 50s. Southwest winds 15 to 20 mph with gusts to around 35 mph increasing to 15 to 30 mph with gusts to around 45 mph after midnight.
Thursday... Windy, sunny. Highs in the upper 70s.
Thursday Night... Partly cloudy in the evening, then mostly cloudy with a 40% chance of rain showers after midnight. Lows in the upper 40s.
Friday... Cooler. Mostly sunny. Chance of rain showers in the morning, then slight chance of rain showers in the afternoon. Highs in the lower 60s. Chance of showers 30%.
Friday Night... Mostly cloudy with a 40% chance of rain showers. Lows around 40.
Saturday... Mostly cloudy with a 50% chance of rain showers. Highs in the mid 50s. Lows in the upper 30s.
Saturday Night... Mostly cloudy with a 50% chance of rain showers. Highs in the mid 50s. Lows in the upper 30s.
Sunday... Partly sunny. Chance of rain showers in the morning, then slight chance of rain showers in the afternoon. Highs in the upper 50s. Chance of showers 40%.
Sunday Night... Mostly cloudy with chance of rain showers in the evening, then partly cloudy with slight chance of rain showers after midnight. Lows in the upper 30s. Chance of showers 30%.
POP = Probability of Precipitation
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