Williams Chapel, IL Weather Forecast
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Williams Chapel Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
| Mostly Cloudy | Chance of Showers | Sunny | Clear | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Clear | Sunny |
| Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Hi: 75°FHi: 24°C Lo: 41°FLo: 5°C | Hi: 75°FHi: 24°C Lo: 41°FLo: 5°C | Hi: 75°FHi: 24°C Lo: 41°FLo: 5°C | Hi: 75°FHi: 24°C Lo: 41°FLo: 5°C | Lo: 49°FLo: 9°C | Hi: 80°FHi: 27°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 432 AM CDT Fri Oct 16 2026 

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Issued: 1257 AM CDT Fri Oct 16 2026
Key Messages
- Dramatically cooler today as a strong cold front sweeps through. Highs are forecast 27 to 32 degrees colder than yesterday.
- Saturday night still looks to have a high potential for a first frost across most of the CWA with overnight lows in the 30s.
- Sunday kicks off a warming trend with highs returning back to around or slightly above normal by mid week amid dry and settled weather with warm days and cool nights.
Discussion
... Issued at 1257 AM CDT Fri Oct 16 2026
A very strong cold fro...
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