Old Mill Park, IL Weather Forecast
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Old Mill Park Weather Forecast
| REST OF TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
| Mostly Clear | Mostly Sunny | Chance of T-Storm | Chance of Showers | Mostly Cloudy | Chance of T-Storm | Chance of Showers | Windy | Mostly Clear | Sunny | Clear | Mostly Sunny |
| Lo: 69°FLo: 21°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 70°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Lo: 35°FLo: 2°C | Hi: 59°FHi: 15°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C |
| POP: 70% | POP: 30% | POP: 90% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1221 AM CDT Tue Oct 13 2026 

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Issued: 626 PM CDT Mon Oct 12 2026
Key Messages
- Unseasonable warmth continues into Tuesday, warmest south of Interstate 80.
- Showers are likely Tuesday night into Wednesday morning and may be accompanied by isolated thunderstorms capable of gusty winds and small hail.
- Widespread rain is expected Thursday followed by a strong cold front and much cooler conditions Friday into the weekend.
Discussion
... Issued at 314 PM CDT Mon Oct 12 2026
After a brief delay in warming due to lingering high clouds, temperatures have since warmed well i...
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