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Castner Park, MT Weather Forecast
Castner Park, MT Weather Forecast Date: 1232 PM MDT Fri Sep 18 2026
The area/counties/county of: Cascade County Below 5000ft, including the city of Great Falls.or toggle through each period.
Rest of Today... Mostly sunny. Highs in the lower 70s. North winds 5 to 10 mph.
Tonight... Cloudy. Slight chance of thunderstorms in the evening, then chance of rain after midnight. Lows in the lower 50s. Northeast winds 5 to 10 mph shifting to the north after midnight. Chance of precipitation 50%.
Saturday... Cloudy. Chance of rain in the morning, then slight chance of rain in the afternoon. Highs in the mid 60s. North winds up to 10 mph. Chance of rain 50%.
Saturday Night... Mostly cloudy. A 20% chance of rain in the evening. Lows in the upper 40s. Southeast winds up to 10 mph shifting to the south after midnight.
Sunday... Mostly sunny. Highs in the lower 70s. South winds up to 5 mph.
Sunday Night... Mostly clear. Lows around 50. Highs in the upper 70s.
Monday... Mostly clear. Lows around 50. Highs in the upper 70s.
Tuesday... Mostly clear. Lows around 50. Highs in the upper 70s.
Wednesday... Mostly clear. Lows around 50. Highs in the upper 70s.
POP = Probability of Precipitation
Castner Park Radar Loop
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