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Illiopolis Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  | | | | | | |  |  | |  |
| Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Clear | Sunny | Partly Cloudy | Chance of Showers | Partly Cloudy | Partly Cloudy |
| Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 50°FLo: 10°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 89°FHi: 32°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C |
| POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 437 PM CDT Tue Oct 06 2026 
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Issued: 644 PM CDT Tue Oct 6 2026
Key Messages
- Dry fuels and low relative humidity will lead to an elevated risk for afternoon agricultural field fires today, Thursday, Friday, and Saturday, especially southeast of the Illinois River.
- The next notable chance for rain is Sunday. The greatest (20-30%) chance for more than one-half inch of rain is south of I-70.
Discussion
... Issued at 238 PM CDT Tue Oct 6 2026
This afternoon, central Illinois is sandwiched between a surface high centered over the mid-Atlantic and a surface low moving...