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| REST OF TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  |  | | |  | | | | | | |
| Chance of T-Storm | Chance of T-Storm | Clearing | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 75°FLo: 24°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 71°FLo: 22°C |
| POP: 40% | POP: 50% | POP: 50% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1006 AM CDT Thu Sep 03 2026 
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Issued: 627 AM CDT Thu Sep 3 2026
Key Messages
- Another hot and humid day is in store today with peak heat index values of 100 to 105F.
- Gusty thunderstorms may impact parts of far northern or northeastern Illinois today. The current probability of occurrence is 30 to 50%.
- Torrential rain-producing storms with a threat for flash flooding may impact far northern Illinois tonight, though confidence is higher that they remain in Wisconsin.
- Temperatures and chances for storms Friday and Saturday are items of low confidence.
- A break in ...