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City of Roundup, MTRoundup, MT 7-Day Weather Forecast
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Roundup Weather Forecast
Roundup, MT Weather Forecast Date: 350 PM MDT Sat Sep 05 2026
Weather forecast for Roundup, MT
Tonight Lo: 55°F Lo: 13°C |
Tonight... Partly cloudy. Lows in the mid 50s. Northeast winds 5 to 15 mph. |
Sun Hi: 81°FHi: 27°C Lo: 59°F Lo: 15°C |
Sunday... Partly sunny. Highs in the lower 80s. Northeast winds 5 to 15 mph. |
Labor Day Hi: 79°FHi: 26°C Lo: 50°F Lo: 10°C |
Labor Day... Partly sunny. Chance of rain showers in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the upper 70s. West winds 5 to 10 mph in the morning increasing to 10 to 20 mph in the afternoon. Chance of precipitation 40%. |
Tue Hi: 71°FHi: 22°C Lo: 45°F Lo: 7°C |
Tuesday... Sunny. Highs in the lower 70s. |
| Wed Hi: 80°FHi: 27°C Lo: 49°F Lo: 9°C |
Wednesday... Mostly sunny. Highs around 80. |
| Thu Hi: 85°FHi: 29°C Lo: 51°F Lo: 11°C |
Thursday... Sunny. Highs in the mid 80s. |
Fri Hi: 79°FHi: 26°C Lo: 49°F Lo: 9°C |
Friday... Mostly sunny. A 20% chance of rain showers in the afternoon. Highs in the upper 70s. |
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