Clapper, IL Weather Forecast
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| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of T-Storm | Chance of Showers | Chance of Showers | Mostly Cloudy |
| Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C Lo: 69°FLo: 21°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C |
| POP: 70% | POP: 50% | POP: 20% | POP: 40% | POP: 50% | POP: 50% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1037 PM CDT Tue Sep 15 2026 

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Issued: 705 PM CDT Tue Sep 15 2026
Key Messages
- A level 1 risk of severe weather continues through this evening, with potential for localized damaging winds.
- The storms tonight will produce areas of heavy rain, with potential for localized flooding north of I-72 where training storms are more likely.
- The unseasonably hot weather will continue in areas south of I-72 into the weekend.
Discussion
... Issued at 206 PM CDT Tue Sep 15 2026
Primary boundary stretches from just north of Quincy to near La Salle this hour, while satellite cont...
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