Flat Rock, IL Weather Forecast
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Flat Rock Weather Forecast
| REST OF TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | MONDAY |
| Partly Cloudy | Partly Sunny | Rain | Chance of Rain | Partly Cloudy | Sunny | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Sunny |
| Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 60°FHi: 16°C Lo: 39°FLo: 4°C | Hi: 60°FHi: 16°C Lo: 39°FLo: 4°C | Hi: 60°FHi: 16°C Lo: 39°FLo: 4°C | Hi: 60°FHi: 16°C |
| POP: 90% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1227 AM CST Tue Nov 03 2026 

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Issued: 240 AM CST Tue Nov 3 2026
Key Messages
- Gusty south winds of 30 to 40 mph will develop today ahead of an approaching cold front.
- A localized threat for severe thunderstorms will develop late this afternoon into this evening, mainly south of Interstate 72. The primary threat is isolated damaging wind gusts.
- Rain totals tonight will be lighter than earlier expectations, with most areas receiving between 0.10 and 0.50 inches. There is only a low (10% to 30%) chance for rainfall exceeding 1 inch.
- Breezy and cooler conditions w...
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