Weather WorldHarrison Lake, MT 7-Day Weather Forecast
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Harrison Lake Weather Forecast
Harrison Lake, MT Weather Forecast Date: 1227 AM MDT Thu Aug 20 2026
Weather forecast for Harrison Lake, MT
Today Hi: 80°FHi: 27°C Lo: 55°F Lo: 13°C |
Today... Mostly sunny. Patchy smoke in the morning. Highs in the upper 70s to mid 80s. |
Fri Hi: 85°FHi: 29°C Lo: 56°F Lo: 13°C |
Friday... Mostly cloudy in the morning then clearing. Highs in the 80s. |
Sat Hi: 80°FHi: 27°C Lo: 56°F Lo: 13°C |
Saturday... Mostly cloudy. Slight chance of rain in the morning, then slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 20%. Highs in the upper 70s to mid 80s. |
Sun Hi: 70°FHi: 21°C Lo: 46°F Lo: 8°C |
Sunday... Partly cloudy. A 20% chance of rain in the morning. Highs in the upper 60s to mid 70s. |
Mon Hi: 70°FHi: 21°C Lo: 46°F Lo: 8°C |
Monday... Mostly sunny. Highs in the upper 60s to mid 70s. |
| Tue Hi: 76°FHi: 24°C Lo: 50°F Lo: 10°C |
Tuesday... Mostly sunny. Highs in the mid 70s to lower 80s. |
| Wed Hi: 75°FHi: 24°C |
Wednesday... Mostly sunny. Highs in the 70s. |
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