Weather WorldBrian Lake, IL Weather Forecast
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Brian Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
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| Clearing | Clear | Sunny | Mostly Clear | Sunny | Clear | Clear | Mostly Clear | Mostly Clear | Sunny | Partly Cloudy | Sunny |
| Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C | Hi: 69°FHi: 21°C Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 637 AM CDT Fri Oct 02 2026 
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Issued: 532 AM CDT Fri Oct 2 2026
Key Messages
- Lingering morning showers south of I-70 will taper off by midday as cooler, drier air filters into the region behind a cold front.
- A benign fall pattern brings dry conditions, light winds, and pleasant temperatures through the weekend and into next week.
Discussion
... Issued at 148 AM CDT Fri Oct 2 2026
SHORT TERM... (Today through Saturday) As of early this morning, a cold front has pushed southeastward across central Illinois, currently positioned along the Ohio River Valley and exte...