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Big Bend Lake, IL Weather Forecast
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Big Bend Lake Weather Forecast
| LATE THIS AFTERNOON | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
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| Partly Cloudy | Mostly Clear | Partly Cloudy | Clearing | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C |
| POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 301 PM CDT Sun Aug 23 2026 
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Big Bend Lake Forecast Discussion
Issued: 136 PM CDT Sun Aug 23 2026
Key Messages
- The next chance of showers and thunderstorms is with a cold front moving across the area midweek.
Discussion
... Issued at 135 PM CDT Sun Aug 23 2026
The weather pattern across the country for the next week looks to be dominated by a western ridge with troughing over the Great Lakes and Northeast. This leaves our area in northwest flow with pleasant temperatures and generally below average precipitation.
Surface high pressure will settle into middle Mississippi Valley and western Great L...