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City of Great Falls, MTGreat Falls, MT 7-Day Night Weather Forecast
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Great Falls, MT Weather Forecast
Great Falls, MT Weather Forecast Date: 1102 PM MDT Fri Aug 21 2026
The area/counties/county of: Cascade County Below 5000ft, including the city of Great Falls.or toggle through each period.
Rest of Tonight... Partly cloudy late in the evening then becoming mostly cloudy. Lows in the lower 60s. East winds up to 10 mph.
Saturday... Mostly cloudy. Slight chance of thunderstorms in the morning, then chance of thunderstorms in the afternoon. Highs around 90. South winds up to 10 mph. Chance of thunderstorms 40%.
Saturday Night... Mostly cloudy. A 40% chance of thunderstorms in the evening. Lows in the lower 60s. Southwest winds 5 to 15 mph.
Sunday... Breezy. Partly sunny. Chance of dry thunderstorms in the afternoon. Highs in the upper 80s. Southwest winds 5 to 15 mph shifting to the west 10 to 25 mph in the afternoon.
Sunday Night... Mostly clear. Lows in the mid 50s. West winds 10 to 20 mph with gusts to around 35 mph shifting to the southwest 5 to 10 mph after midnight.
Monday... Sunny. Highs around 80.
Monday Night... Mostly clear. Lows in the lower 50s. Highs in the mid 80s.
Tuesday... Mostly clear. Lows in the lower 50s. Highs in the mid 80s.
Tuesday Night... Partly cloudy. Lows in the mid 50s. Highs in the upper 80s.
Wednesday... Partly cloudy. Lows in the mid 50s. Highs in the upper 80s.
Wednesday Night... Mostly cloudy with a 20% chance of rain showers in the evening, then partly cloudy after midnight. Lows in the upper 50s.
Thursday... Sunny. Highs in the mid 80s.
Thursday Night... Partly cloudy. Lows in the lower 50s.
POP = Probability of Precipitation
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