Weather WorldHalf Day County Forest Preserve, IL Weather Forecast
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Half Day County Forest Preserve Weather Forecast
| REST OF TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Clear | Partly Cloudy | Mostly Clear | Partly Cloudy | Chance of Showers | Chance of T-Storm | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Cloudy |
| Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C |
| POP: 20% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 111 AM CDT Mon Aug 24 2026 
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Half Day County Forest Preserve Forecast Discussion
Issued: 250 AM CDT Mon Aug 24 2026
Key Messages
- The next chance of showers and thunderstorms is with a cold front moving across the area midweek.
Discussion
... Issued at 212 AM CDT Mon Aug 24 2026
High pressure continues to settle into the mid-Mississippi Valley and will remain in place through Tuesday. As a result, dry conditions with generally comfortable humidity are expected to start off the work week. Temperatures today will once again be on the seasonably cool side with highs only topping out in the upper 70s to around 80 this...