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Lake Bluff, IL Weather Forecast
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Lake Bluff Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 | |  |  | |  |  | |  | | |  |
| Chance of Showers | Showers | Chance of T-Storm | Chance of T-Storm | Showers | Clearing | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny |
| Lo: 61°FLo: 16°C | Hi: 69°FHi: 21°C | Lo: 65°FLo: 18°C | Hi: 70°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C |
| POP: 50% | POP: 100% | POP: 80% | POP: 100% | POP: 90% |
POP = Probability of Precipitation.
Weather Outlook Updated: 705 PM CDT Tue Sep 29 2026 
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Issued: 629 PM CDT Tue Sep 29 2026
Key Messages
- Periods of rain, heavy at times, expected late tonight through early Friday morning. Significant rises on area rivers and streams may result.
Discussion
... Issued at 241 PM CDT Tue Sep 29 2026
Early this afternoon, GOES water vapor imagery shows an expansive plume of deep Gulf moisture (PWATs ~1.5"+) streaming northward from the Plains across the Upper Midwest and into Ontario. This broad latitudinal transport is driven by a strong south- southwesterly low-level mass response east of a...