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Prophetstown State Park, IL Weather Forecast
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Prophetstown State Park Weather Forecast
| THIS AFTERNOON | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY |
 |  | |  |  |  |  | | |  | | |
| Mostly Sunny | Partly Cloudy | Sunny | Chance of T-Storm | Chance of Showers | Chance of Showers | Showers | Chance of Showers | Mostly Sunny | Mostly Clear | Mostly Clear | Sunny |
| Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Hi: 59°FHi: 15°C Lo: 39°FLo: 4°C | Hi: 59°FHi: 15°C Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C |
| POP: 70% | POP: 50% | POP: 40% | POP: 90% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 126 PM CDT Mon Oct 12 2026 
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Issued: 155 PM CDT Mon Oct 12 2026
Key Messages
- Continued unseasonably warm through Tuesday. Refer to the climate section for specific numbers.
- There is a Marginal (level 1 of 5) risk for isolated severe storms Tuesday night, with the main hazards heavy downpours and large hail.
- A strong cold front to sweep through Friday will bring much cooler temps for the weekend and the risk for frost, especially Friday night.
- Above normal temps return Sunday and Monday.
Aviation
/18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1241 PM CDT Mon Oct 12...