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Grassy Reservoir Weather Forecast
| REST OF TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY |
 |  | |  |  |  |  |  | | |  | |
| Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Mostly Sunny | Increasing Clouds | Partly Cloudy | Partly Cloudy |
| Hi: 86°FHi: 30°C | Lo: 58°FLo: 14°C | Hi: 89°FHi: 32°C | Lo: 58°FLo: 14°C | Hi: 91°FHi: 33°C | Hi: 89°FHi: 32°C Lo: 60°FLo: 16°C | Hi: 89°FHi: 32°C Lo: 60°FLo: 16°C | Lo: 57°FLo: 14°C | Hi: 86°FHi: 30°C | Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C |
| POP: 30% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 840 AM MDT Fri Aug 14 2026 
Grassy Reservoir Radar Loop
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