Simms, MT Weather Forecast
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| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
| Chance of Rain | Partly Cloudy | Sunny | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Rain and Snow | Mostly Sunny | Chance of Rain | Rain and Snow | Rain and Snow |
| Hi: 49°FHi: 9°C | Lo: 35°FLo: 2°C | Hi: 50°FHi: 10°C | Lo: 29°FLo: -2°C | Hi: 39°FHi: 4°C | Hi: 41°FHi: 5°C Lo: 29°FLo: -2°C | Hi: 41°FHi: 5°C Lo: 29°FLo: -2°C | Lo: 30°FLo: -1°C | Hi: 49°FHi: 9°C | Lo: 31°FLo: -1°C | Hi: 45°FHi: 7°C | Lo: 29°FLo: -2°C |
| POP: 50% | POP: 20% | POP: 40% | POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 337 AM MDT Tue Oct 27 2026 

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Issued: 355 AM MDT Tue Oct 27 2026
Key Messages
- Light rain and snow showers this morning will generally diminish this afternoon.
- There is a small chance for mostly a passing mountain rain or snow shower Wednesday through Saturday, with a better chance for a more widespread rain or snow on Sunday.
- Afternoon temperatures will mostly be just a bit below normal for most areas over the next few days.
Discussion
...- Meteorological Overview: The upper level disturbance that is producing all the rain/snow this morning continues to move east...
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