Weather WorldOnstad Park, MT Weather Forecast
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Onstad Park Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  |  |  | |  | | | |  | | |
| Chance of Showers | Clearing | Sunny | Mostly Clear | Mostly Sunny | Mostly Cloudy | Mostly Sunny | Mostly Clear | Mostly Sunny | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 70°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Lo: 41°FLo: 5°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 501 AM MDT Wed Sep 23 2026 
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Issued: 1148 PM MDT Tue Sep 22 2026
Key Messages
- Expecting some scattered rain showers and a few isolated thunderstorms through Wednesday morning.
- Thursday will be the warmest day this week with above to much above normal temperatures.
- A cold front early Saturday will bring wind and a return to cooler but near normal temperatures this weekend.
Discussion
... SYNOPTIC SETUP:
Large upper low over the Gulf of Alaska will keep the upper flow over our area into Friday generally from the SW.
A disturbance moving NE out of eastern Idaho has t...