Weather WorldFive Reservoir, MT Weather Forecast
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Five Reservoir Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT |
 |  |  | | | | |  | | | | |
| Partly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Sunny | Rain and Snow | Rain and Snow | Rain and Snow | Rain and Snow | Rain and Snow |
| Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 80°FHi: 27°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 45°FHi: 7°C | Lo: 30°FLo: -1°C | Hi: 45°FHi: 7°C | Lo: 30°FLo: -1°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 341 AM MDT Wed Oct 07 2026 
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Issued: 1120 PM MDT Tue Oct 6 2026
Key Messages
- Warm temperatures above normal and mostly clear skies into Friday.
- Friday will be monitored for any Fire Wx concerns as a ridge breaks down and cold front moves through.
- Overcast skies, possible precipitation, and low temperatures anticipated this weekend and into Monday. Isolated snow possible at higher elevations.
Discussion
... Synoptic Setup: Forecast begins with relatively zonal to NW flow from Montana through the PCNW and across SW Canada. To the S, hot high pressure sits over th...