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Swamp Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  | |  | |  |  | |  |  | |
| Rain Showers | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Cloudy | Partly Sunny | Rain Showers | Snow Showers | Rain/Snow Showers | Mostly Sunny |
| Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 50°FHi: 10°C | Lo: 39°FLo: 4°C | Hi: 51°FHi: 11°C | Lo: 39°FLo: 4°C | Hi: 41°FHi: 5°C | Lo: 35°FLo: 2°C | Hi: 45°FHi: 7°C |
| POP: 20% | POP: 60% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 458 PM MDT Wed Sep 23 2026 
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Issued: 456 PM MDT Wed Sep 23 2026
Key Messages
- Isolated showers and thunderstorms this afternoon, mainly west of Billings and in far eastern Montana.
- Warm and dry end of the work week; 80s return.
- Unsettled and cooler Sunday into early next week.
Discussion
...
Rest of Today through Tuesday...
As a shortwave trough exits Montana today, isolated showers and a few weak thunderstorms are expected to develop this afternoon. Expect the chance for precipitation to exist mainly over the mountains and foothills west of Billings. Gusty winds ...