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City of Hamilton, ILHamilton, IL Weather Forecast
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Hamilton Weather Forecast
| THIS AFTERNOON | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  | |  |  | | |  | | | |  |
| Sunny | Partly Cloudy | Mostly Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Sunny | Mostly Clear | Mostly Clear | Chance of Showers | Mostly Sunny | Chance of Showers |
| Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C | Lo: 75°FLo: 24°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Hi: 85°FHi: 29°C Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C Lo: 59°FLo: 15°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C |
| POP: 50% | POP: 80% | POP: 50% | POP: 50% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 126 PM CDT Mon Sep 07 2026 
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Issued: 227 PM CDT Mon Sep 7 2026
Key Messages
- A storm system passing through the Upper Midwest Tuesday evening into Wednesday will bring widespread showers and storms to the area. There will be a low-end risk for strong- severe storms, with heavy rainfall accompanying storms.
- Quiet weather Thursday into Friday, as high pressure passes overhead. Seasonal conditions will remain, with mostly clear skies.
- Another stretch of potentially active weather this weekend into the next work week, bringing daily chances of precipitation for s...