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Chapman, IL Weather Forecast
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Chapman Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  |  | |  | | | | |  | |
| Thunderstorms | Chance of T-Storm | Sunny | Partly Cloudy | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Mostly Clear |
| Hi: 99°FHi: 37°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Hi: 95°FHi: 35°C Lo: 61°FLo: 16°C | Hi: 95°FHi: 35°C Lo: 61°FLo: 16°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C |
| POP: 20% | POP: 20% | POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 417 AM CDT Sat Sep 05 2026 
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Issued: 502 AM CDT Sat Sep 5 2026
Key Messages
- The late summer heatwave will continue today followed by a break in the heat with relatively cooler temperatures Sunday and especially Monday.
- Aside from a few isolated showers and thunderstorms today, predominantly dry conditions will persist through Tuesday
- Another period of heat is expected Tuesday into Wednesday, but indications are that this period will be much shorter.
Aviation
/06Z TAFS THROUGH 12Z SUNDAY/... Issued at 501 AM CDT Sat Sep 5 2026
Dry and VFR flight conditions are e...