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Simon Reservoir Weather Forecast
| TONIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 | |  |  |  |  | | |  | | | |
| Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Partly Cloudy | Mostly Sunny | Chance of Showers | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny |
| Lo: 41°FLo: 5°C | Hi: 49°FHi: 9°C | Lo: 35°FLo: 2°C | Hi: 51°FHi: 11°C | Lo: 35°FLo: 2°C | Hi: 59°FHi: 15°C | Lo: 41°FLo: 5°C | Hi: 59°FHi: 15°C | Lo: 31°FLo: -1°C | Hi: 61°FHi: 16°C | Lo: 40°FLo: 4°C | Hi: 71°FHi: 22°C |
| POP: 80% | POP: 20% | POP: 30% | POP: 20% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 526 PM MDT Sun Oct 11 2026 
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Issued: 755 PM MDT Sun Oct 11 2026
Key Messages
- Strong weather system impacts the region through midday Monday, with heavy snow over the western mountains, accumulating wet snow along the western foothills, and rain/wet snow for central lower elevations. The east will see occasional rain.
- Good chance of a freeze across the region Monday night.
- Weather pattern remains unsettled through mid week, with slowly rising temps.
- Growing confidence for warmer & drier weather next weekend.
Discussion
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Through next Saturday...
An upper level l...