Marysville, MT Weather Forecast
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Marysville Weather Forecast
| REST OF TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
| Sunny | Partly Cloudy | Sunny | Chance of Rain | Rain and Snow | Light Snow | Partly Cloudy | Partly Cloudy | Chance of Snow | Chance of Snow | Chance of Snow | Snow and Rain |
| Hi: 63°FHi: 17°C | Lo: 42°FLo: 6°C | Hi: 63°FHi: 17°C | Lo: 39°FLo: 4°C | Hi: 49°FHi: 9°C | Lo: 27°FLo: -3°C | Hi: 42°FHi: 6°C Lo: 25°FLo: -4°C | Hi: 42°FHi: 6°C Lo: 25°FLo: -4°C | Hi: 40°FHi: 4°C Lo: 25°FLo: -4°C | Hi: 40°FHi: 4°C Lo: 25°FLo: -4°C | Hi: 45°FHi: 7°C | Hi: 43°FHi: 6°C Lo: 29°FLo: -2°C |
| POP: 50% | POP: 100% | POP: 90% | POP: 20% | POP: 20% | POP: 20% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 PM MDT Wed Oct 21 2026 

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Issued: 303 PM MDT Wed Oct 21 2026
Key Messages
- Mild and dry conditions will continue through Thursday.
- Widespread precipitation returns late Thursday into Friday with cooler temperatures lasting through the weekend.
Discussion
...- Meteorological Overview:
Today over Southwestern Montana there remains Southwest flow aloft with weak zonal flow (west-east) over North-central, and Central Montana. Due to slightly stronger warm air advection today temperatures will rebound to above seasonal averages. Across North- central and Central Mon...
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