Griggsville, IL Weather Forecast
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Griggsville Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY |
| Chance of T-Storm | Chance of T-Storm | Isolated Showers | Clearing | Sunny | Clear | Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear |
| Hi: 75°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 55°FHi: 13°C | Lo: 35°FLo: 2°C | Hi: 59°FHi: 15°C | Hi: 69°FHi: 21°C Lo: 39°FLo: 4°C | Hi: 69°FHi: 21°C Lo: 39°FLo: 4°C | Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C |
| POP: 100% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 513 AM CDT Thu Oct 15 2026 

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Issued: 626 AM CDT Thu Oct 15 2026
Key Messages
- Widespread showers and thunderstorms are expected through the first half of the day, becoming isolated to scattered this afternoon and evening. There is a low potential for isolated damaging winds, and lower potential for a brief, week tornado.
- A strong cold front brings much cooler and drier conditions Friday through Sunday morning. A gradual warming trend begin Sunday and continues into next week.
Aviation
/12Z TAFS THROUGH 18Z FRIDAY/... Issued at 626 AM CDT Thu Oct 15 2026
A warm fr...
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