Weather World
Forrest, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Forrest Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT |
 |  |  |  | |  | | |  | | |  |
| Mostly Sunny | Mostly Clear | Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy |
| Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C |
| POP: 20% | POP: 20% | POP: 50% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 556 AM CDT Wed Sep 02 2026 
Forrest Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Forrest Weather Map
Forrest Quick Facts
Forrest Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 626 AM CDT Wed Sep 2 2026
Key Messages
- Today will be another hot and humid day with heat indices around 105F.
- Several rounds of thunderstorms will move through the general area Thursday through Saturday. Some of these may be severe.
- A break in the hot and humid pattern may arrive by early next week.
Discussion
... Issued at 225 AM CDT Wed Sep 2 2026
A large heat dome remains stalled over the Lower Mississippi River Valley south of a slow-moving upper-level low currently in central Ontario. Quasi-zonal flow remains in place b...