Weather WorldRoundup High School, MT Weather Forecast
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Roundup High School Weather Forecast
| REST OF TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  |  |  |  |  | |  | | | |  |
| Sunny | Mostly Clear | Chance of Showers | Rain Showers | Clouds | Chance of Showers | Chance of Showers | Chance of T-Storm | Mostly Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 89°FHi: 32°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C |
| POP: 40% | POP: 30% | POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1116 AM MDT Thu Sep 10 2026 
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Issued: 1240 PM MDT Thu Sep 10 2026
Key Messages
- Please note that the forecast has trended drier over the next few days.
- Cold front arrives tonight, bringing cooler weather Friday into next week.
- Occasional chances of showers (mainly light) Friday through Sunday night. A few thunderstorms possible in southeast Montana, especially Sunday night.
- Snow showers in the mountains above 10000 feet Sunday and Sunday night; little if any accumulation.
Discussion
... Through next Thursday...
A warm & dry day is ongoing, ahead of a Canadian cold ...