Weather WorldArch Lake, MT 7-Day Weather Forecast
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Arch Lake Weather Forecast
Arch Lake, MT Weather Forecast Date: 1150 PM MST Sat Nov 14 2026
Weather forecast for Arch Lake, MT
Tonight Lo: 25°F Lo: -4°C |
Tonight... Mostly cloudy. Lows in the mid 20s. West winds 5 to 15 mph. |
Sun Hi: 45°FHi: 7°C Lo: 21°F Lo: -6°C |
Sunday... Mostly sunny. Highs in the mid 40s. Southwest winds 5 to 15 mph. |
Mon Hi: 51°FHi: 11°C Lo: 29°F Lo: -2°C |
Monday... Increasing clouds. Highs in the lower 50s. Southwest winds 5 to 10 mph. |
Tue Hi: 50°FHi: 10°C Lo: 21°F Lo: -6°C |
Tuesday... Mostly cloudy. A 50% chance of snow showers in the afternoon. Highs around 50. |
| Wed Hi: 39°FHi: 4°C Lo: 16°F Lo: -9°C |
Wednesday... Mostly cloudy with a 40% chance of snow showers in the morning, then mostly sunny in the afternoon. Colder. Highs in the upper 30s. |
| Thu Hi: 41°FHi: 5°C Lo: 21°F Lo: -6°C |
Thursday... Mostly cloudy with a 40% chance of snow showers. Highs in the lower 40s. |
| Fri Hi: 41°FHi: 5°C Lo: 18°F Lo: -8°C |
Friday... Snow showers likely. Highs in the lower 40s. Chance of precipitation 60%. |
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