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Glacial County Park, IL Weather Forecast
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Glacial County Park Weather Forecast
| REST OF TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
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| Patchy Fog | Sunny | Partly Cloudy | Chance of T-Storm | Clearing | Chance of T-Storm | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C |
| POP: 70% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1005 PM CDT Wed Aug 19 2026 
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Glacial County Park Forecast Discussion
Issued: 837 PM CDT Wed Aug 19 2026
Key Messages
- Scattered thunderstorms will continue this evening well south of I-80.
- Storms this evening will be capable of locally torrential downpours which could result in localized flash flood threat.
Discussion
... Issued at 233 PM CDT Wed Aug 19 2026
Through Tonight...
Showers and thunderstorms should tend to gradually weaken by mid evening as the area of showers/storms pushes gradually south of the area as diffuse front pushes slowly southward. Behind the front, sk...