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Leaf River, IL Weather Forecast
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Leaf River Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 | |  |  | | | | | | |  |  |
| Partly Cloudy | Partly Cloudy | Clearing | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Mostly Cloudy |
| Hi: 75°FHi: 24°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C |
| POP: 20% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 256 AM CDT Fri Sep 04 2026 
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Issued: 302 AM CDT Fri Sep 4 2026
Key Messages
- Today will be another unseasonably hot and humid day with peak afternoon heat indices of 100 to 110 degrees.
- Gradually turning cooler and less humid this weekend, though remaining seasonably warm.
- Moderate to high swim risk expected late Saturday into early Sunday during the final weekend of beach season.
Discussion
... Issued at 301 AM CDT Fri Sep 4 2026
An unusually strong late season mid-upper level ridge of high pressure continues to dominate the weather across much of the central a...