Weather WorldFort Owen State Park, MT Weather Forecast
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Fort Owen State Park Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Smoke | Partly Cloudy | Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Mostly Clear | Chance of Rain | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 57°FLo: 14°C | Hi: 93°FHi: 34°C | Lo: 60°FLo: 16°C | Hi: 90°FHi: 32°C | Lo: 53°FLo: 12°C | Hi: 83°FHi: 28°C | Lo: 47°FLo: 8°C | Hi: 83°FHi: 28°C | Lo: 50°FLo: 10°C | Hi: 87°FHi: 31°C | Lo: 53°FLo: 12°C | Hi: 87°FHi: 31°C |
| POP: 50% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Thu Aug 20 2026 
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Fort Owen State Park Forecast Discussion
Issued: 145 PM MDT Thu Aug 20 2026
Discussion
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KEY MESSAGES:- Ridge of high pressure and abnormally hot temperatures in control through end of the week peaking Friday.
- Elevated convection spreading northward Friday afternoon into the overnight bringing localized lightning and gusty outflow winds.
- Showers and thunderstorms with heavy rain potential in north- central Idaho and southwest Montana for Saturday.
The Northern Rockies will remain under high pressure today and on Friday. Daytime high temperatu...