Weather WorldDean Park, IL Weather Forecast
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Dean Park Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  | | |  | |  |  | |  | |  |
| Clearing | Sunny | Partly Cloudy | Sunny | Clear | Sunny | Chance of Showers | Showers | Chance of Showers | Chance of T-Storm | Chance of Showers | Partly Sunny |
| Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C |
| POP: 50% | POP: 70% | POP: 60% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 337 PM CDT Sat Oct 10 2026 
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Issued: 208 PM CDT Sat Oct 10 2026
Key Messages
- There is a diminishing threat of rain from the remnants of Isaias tonight into Sunday in our forecast area, with rain chances (20-30%) confined to a smaller portion of southeast Illinois.
- Near-record warmth arrives Monday, October 12, with afternoon high temperatures surging into the upper 80s to lower 90s. Tuesday looks equally as warm for our counties south of I-72.
- An extended period of rain chances is on track Tuesday night through Thursday. Severe weather potential is uncertain ...