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Sumner, IL Weather Forecast
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Sumner Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | VETERANS DAY | WEDNESDAY NIGHT | THURSDAY |
 |  | | | | | | | |  |  | |
| Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 31°FLo: -1°C | Hi: 55°FHi: 13°C | Lo: 30°FLo: -1°C | Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C Lo: 40°FLo: 4°C | Hi: 69°FHi: 21°C Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C Lo: 39°FLo: 4°C | Hi: 59°FHi: 15°C Lo: 35°FLo: 2°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 422 PM CST Fri Nov 06 2026 
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Issued: 500 PM CST Fri Nov 6 2026
Key Messages
- The first widespread freeze is expected (80-100% chance) across central and southeast IL by dawn Saturday morning.
- NBM has an 80-100% probability of lows below 32F over central IL overnight north of I-70, and greater than 50% chance southeast of I-70 getting below 32F late tonight.
Discussion
... Issued at 200 PM CST Fri Nov 6 2026
The early afternoon surface map shows a cold front pushing well se of IL into east TN, while 1023 mb Canadian high pressure extended from eastern KS across I...