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Rossiter Lake, MT Weather Forecast
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Rossiter Lake Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Chance of Rain | Chance of Rain | Chance of T-Storm | Snow and Rain | Sunny | Mostly Clear | Mostly Clear | Mostly Sunny | Chance of Snow | Snow and Rain | Chance of Snow | Chance of Snow |
| Hi: 57°FHi: 14°C | Lo: 39°FLo: 4°C | Hi: 45°FHi: 7°C | Lo: 21°FLo: -6°C | Hi: 39°FHi: 4°C | Hi: 43°FHi: 6°C Lo: 25°FLo: -4°C | Hi: 43°FHi: 6°C Lo: 25°FLo: -4°C | Hi: 44°FHi: 7°C | Lo: 29°FLo: -2°C | Hi: 43°FHi: 6°C | Lo: 25°FLo: -4°C | Hi: 41°FHi: 5°C |
| POP: 20% | POP: 50% | POP: 100% | POP: 100% | POP: 20% | POP: 40% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 336 AM MDT Thu Oct 22 2026 
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Issued: 413 AM MDT Thu Oct 22 2026
Key Messages
- Today will be the last mild day for awhile.
- Rain and snow develop over the CWA on Friday, along with much cooler temperatures.
- Generally dry conditions, along with more fall temperatures expected Saturday through Tuesday.
Discussion
...- Meteorological Overview: The upper level ridge that has been over the CWA for the past few days will begin to move eastward today, as two upper level disturbances approach the CWA for Friday, one from the north and one from the south. Today will be the ...