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MacArthur Lake Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  |  | |  |  |  |  | |  | | |
| Patchy Fog | Partly Cloudy | Cloudy | Patchy Fog | Partly Cloudy | Mostly Clear | Chance of Snow | Mostly Cloudy | Chance of Snow | Rain and Snow | Partly Cloudy | Partly Cloudy |
| Hi: 47°FHi: 8°C | Lo: 32°FLo: 0°C | Hi: 50°FHi: 10°C | Lo: 33°FLo: 1°C | Hi: 46°FHi: 8°C | Lo: 33°FLo: 1°C | Hi: 47°FHi: 8°C | Lo: 39°FLo: 4°C | Hi: 46°FHi: 8°C | Lo: 32°FLo: 0°C | Hi: 46°FHi: 8°C | Lo: 35°FLo: 2°C |
| POP: 30% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1203 AM PST Mon Nov 02 2026 
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Issued: 405 AM MST Mon Nov 2 2026
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KEY MESSAGES:- Mild and quiet weather expected through Wednesday, though morning low clouds or valley fog is possible.
- Two weak systems bring showers Thursday and Friday with light dusting of snow above 5,000 feet, and westerly breezes.
- Mild and dry conditions return for the weekend, with morning fog remaining possible.
Breezy northwest winds along the Continental Divide (including gusts over 20 mph near Butte) will gradually ease today as high pressure builds into the Northern Rockie...