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Grassy Lake, OK Weather Forecast
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Grassy Lake Weather Forecast
| REST OF TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | | | |  |  |  |  |  | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Cloudy | Mostly Sunny | Clear | Sunny | Clear |
| Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 51°FLo: 11°C |
| POP: 100% | POP: 90% | POP: 80% | POP: 50% | POP: 60% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 140 PM CDT Thu Oct 01 2026 
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Issued: 509 PM CDT Thu Oct 1 2026
Key Messages
Issued at 339 PM CDT Thu Oct 1 2026- A Flash Flood Watch is in effect through 7 AM Friday morning, as moderate to heavy rain will move across our NW zones. Rainfall amounts of 1" to 3", with some isolated totals will be possible.
- A slow moving upper trough/cool front will keep rain chances in the forecast through the weekend over the entire forecast area.
- Cooler temperatures are expected to follow next week, as a stronger cold front will sweep through the region on Sunday, ushering in...