Weather WorldCheatgrass Reservoir, ID Weather Forecast
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Cheatgrass Reservoir Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
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| Chance of T-Storm | Rain Showers | Rain Showers | Clouds | Patchy Fog | Mostly Cloudy | Mostly Cloudy | Patchy Fog | Patchy Fog | Patchy Fog | Chance of Showers | Partly Cloudy |
| Lo: 43°FLo: 6°C | Hi: 49°FHi: 9°C | Lo: 36°FLo: 2°C | Hi: 50°FHi: 10°C | Lo: 34°FLo: 1°C | Hi: 54°FHi: 12°C Lo: 37°FLo: 3°C | Hi: 54°FHi: 12°C Lo: 37°FLo: 3°C | Hi: 53°FHi: 12°C Lo: 34°FLo: 1°C | Hi: 53°FHi: 12°C Lo: 34°FLo: 1°C | Lo: 34°FLo: 1°C | Hi: 51°FHi: 11°C | Lo: 32°FLo: 0°C |
| POP: 90% | POP: 100% | POP: 70% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 230 PM MDT Sat Oct 31 2026 
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Issued: 217 PM MDT Sat Oct 31 2026
Key Messages
- Isolated to scattered showers and thundestorms through this evening.
- Widespread rain and high elevation snow late tonight into Sunday.
- Cooler with gusty winds Sunday, and especially Sunday night, then drying and warming Monday through Wednesday. Slight chance of precipitation late week.
Aviation
/18Z Saturday through Sunday/... Issued 1228 PM MDT SAT OCT 31 2026
Mainly VFR with isolated to scattered showers through the afternoon. Isolated thunderstorms across S Idaho and far SE Oregon l...