Marion, MT Weather Forecast
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Marion Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
| Partly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Rain | Chance of T-Storm | Mostly Cloudy | Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Partly Cloudy |
| Hi: 75°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 66°FHi: 19°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 60°FHi: 16°C | Lo: 36°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 36°FLo: 2°C |
| POP: 40% | POP: 40% | POP: 20% | POP: 40% | POP: 50% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 AM MDT Wed Sep 09 2026 

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Issued: 423 AM MDT Wed Sep 9 2026
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KEY MESSAGES:- Today and Thursday will be the warmest days before the change back to fall-like weather.
- Choppy lake conditions Thursday due to westerly winds between 15 and 25 mph, and locally higher speeds expected over the Divide.
- Stiff northeast winds are possible Friday night through Saturday...choppy lakes expected.
- Cutoff Low brings widespread rain, with snow above 7000 feet Saturday night into Sunday.
The satellite imagery this morning reveals fog that has developed in several ...
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