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Hamilton Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  |  |  | | | | | | | |
| Mostly Sunny | Partly Cloudy | Chance of Rain | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of Rain | Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 70°FHi: 21°C | Lo: 47°FLo: 8°C | Hi: 67°FHi: 19°C | Lo: 40°FLo: 4°C | Hi: 70°FHi: 21°C | Lo: 43°FLo: 6°C | Hi: 71°FHi: 22°C | Lo: 43°FLo: 6°C | Hi: 71°FHi: 22°C | Lo: 43°FLo: 6°C | Hi: 75°FHi: 24°C | Lo: 47°FLo: 8°C |
| POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 AM MDT Tue Sep 29 2026 
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Issued: 1259 AM MDT Tue Sep 29 2026
Discussion
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KEY MESSAGES:- Increasing winds today, especially across northwest Montana and the higher terrain.
- Scattered rain showers tonight into early Wednesday then slight warming trend into the remainder of the week.
- High confidence in warmer and drier conditions this weekend through much of next week (and maybe beyond).
Clouds will increase across northwest Montana today as a weakening moisture plume settles along the Canadian border, generating light orographic showers focused primarily ove...