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City of Roundup, MTRoundup, MT 7-Day Night Weather Forecast
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Roundup, MT Weather Forecast
Roundup, MT Weather Forecast Date: 802 AM MDT Fri Sep 11 2026
The area/counties/county of: Musselshell, including the city of Roundup.or toggle through each period.
Rest of Today... Mostly sunny early in the morning, then mostly cloudy with scattered rain showers in the late morning and afternoon. Much cooler. Highs in the lower 60s. North winds 5 to 15 mph. Chance of precipitation 40%.
Tonight... Cloudy. Scattered rain showers in the evening, then isolated rain showers overnight. Lows in the mid 40s. Northeast winds 5 to 10 mph. Chance of precipitation 40%.
Saturday... Mostly cloudy. Highs in the lower 60s. East winds 5 to 10 mph.
Saturday Night... Mostly cloudy. A 20% chance of rain showers overnight. Lows in the lower 40s. Northeast winds 5 to 15 mph.
Sunday... Partly sunny with a 40% chance of rain showers. Highs in the upper 60s. East winds 5 to 15 mph.
Sunday Night... Mostly cloudy. Slight chance of thunderstorms early in the evening. Chance of rain showers in the evening, then slight chance of rain showers overnight. Lows in the lower 40s. Chance of precipitation 50%.
Monday... Mostly sunny. Highs in the mid 60s.
Monday Night... Mostly clear. Lows in the upper 30s.
Tuesday... Mostly sunny. Highs in the upper 60s.
Tuesday Night... Partly cloudy. Lows in the lower 40s.
Wednesday... Mostly sunny. Highs in the mid 60s.
Wednesday Night... Mostly clear. Lows in the lower 40s.
POP = Probability of Precipitation
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