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Village of Forreston, ILForreston, IL Weather Forecast
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Forreston Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  |  |  |  | | |  | | |
| Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Cloudy |
| Hi: 59°FHi: 15°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C |
| POP: 20% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 301 AM CDT Mon Sep 21 2026 
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Issued: 135 AM CDT Mon Sep 21 2026
Key Messages
- Patchy showers and light drizzle at times into Tuesday morning.
- Dry, but with below average temperatures for much of the remainder of the work week.
Discussion
... Issued at 135 AM CDT Mon Sep 21 2026
The surface cold front has settled south of the area across downstate IL/IN and the Ohio Valley this morning, while a broad area of surface high pressure was building across western Ontario and the far northern Great Lakes. Though the surface frontal zone is well south of the area, the for...