Weather WorldUpper Boulder Lake, MT 7-Day Weather Forecast
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Upper Boulder Lake Weather Forecast
Upper Boulder Lake, MT Weather Forecast Date: 336 PM MDT Mon Aug 24 2026
Weather forecast for Upper Boulder Lake, MT
Tonight Lo: 50°F Lo: 10°C |
Tonight... Partly cloudy early in the evening then becoming mostly cloudy. Slight chance of thunderstorms early in the evening, then slight chance of rain showers late in the evening. Patchy smoke until early morning. Lows 46 to 52. Southwest winds up to 10 mph shifting to the south after midnight. Chance of precipitation 20%. |
Tue Hi: 73°FHi: 23°C Lo: 51°F Lo: 11°C |
Tuesday... Mostly sunny. A 20% chance of thunderstorms in the afternoon. Highs 67 to 77. Southwest winds up to 5 mph shifting to the west in the afternoon. |
| Wed Hi: 75°FHi: 24°C Lo: 51°F Lo: 11°C |
Wednesday... Mostly sunny. A 20% chance of thunderstorms in the afternoon. Highs 69 to 79. South winds up to 5 mph shifting to the west in the afternoon. |
| Thu Hi: 76°FHi: 24°C Lo: 51°F Lo: 11°C |
Thursday... Partly sunny. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 70 to 80. Chance of precipitation 40%. |
| Fri Hi: 72°FHi: 22°C Lo: 44°F Lo: 7°C |
Friday... Mostly sunny. A 20% chance of thunderstorms in the afternoon. Highs 66 to 76. |
| Sat Hi: 69°FHi: 21°C Lo: 44°F Lo: 7°C |
Saturday... Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Highs 63 to 73. Lows 40 to 46. Chance of precipitation 50%. |
| Sun Hi: 63°FHi: 17°C Lo: 42°F Lo: 6°C |
Sunday... Mostly sunny. Slight chance of rain showers in the morning, then slight chance of thunderstorms in the afternoon. Highs 57 to 67. Chance of precipitation 20%. |
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