Weather WorldWindfall Lake, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Windfall Lake Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  |  | |  |  |  |  |  | | |
| Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Clearing | Mostly Clear | Mostly Clear | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Lo: 70°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C |
| POP: 40% | POP: 50% | POP: 50% | POP: 30% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 152 AM CDT Wed Sep 09 2026 
Windfall Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Windfall Lake Weather Map
Windfall Lake Quick Facts
Windfall Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 205 AM CDT Wed Sep 9 2026
Key Messages
- Heat indices will top out around 100 degrees this afternoon south of I-72 due to high temperatures in the 90s and rising humidity levels.
- Scattered thunderstorms this morning and afternoon, becoming more widespread late tonight along a stalled front; localized heavy rainfall of 1 to 3 inches could cause localized flooding, particularly south of I-70. There is a marginal risk (level 1 of 5) for severe thunderstorms near/south of 1- 72.
Discussion
... Issued at 205 AM CDT Wed Sep 9 2026
M...