Cornell School, IL Weather Forecast
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Cornell School Weather Forecast
| LATE THIS AFTERNOON | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
| Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C |
| POP: 50% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 416 PM CDT Sun Sep 06 2026 

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Issued: 114 PM CDT Sun Sep 6 2026
Key Messages
- Seasonably warm conditions through Monday, although cooler and more comfortable than recent days.
Discussion
... Issued at 114 PM CDT Sun Sep 6 2026
Surface high pressure continues to expand over the Great Lakes early this afternoon, providing the area with cooler east- northeasterly surface winds. While dewpoints started the day around 70, a persistent influx of a drier low-level airmass has continued to drop values through the 60s this morning. The remainder of the day will be rather ...
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