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Mattis Lake, IL Weather Forecast
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Mattis Lake Weather Forecast
| REST OF TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  | | |  | | | | | |  |
| Mostly Clear | Sunny | Partly Cloudy | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Sunny | Partly Cloudy | Chance of Showers |
| Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°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: 90°FHi: 32°C Lo: 71°FLo: 22°C | Hi: 90°FHi: 32°C Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C |
| POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1037 PM CDT Wed Aug 26 2026 
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Issued: 711 PM CDT Wed Aug 26 2026
Key Messages
- Comfortable and dry weather is anticipated Thursday through Saturday, followed by the return of summer-like heat early next week.
Discussion
... Issued at 1212 PM CDT Wed Aug 26 2026
A surface cold front currently stretches near the I-55 corridor in central IL, highlighted by and agitated cu field on visible satellite imagery. Recent radar and satellite trends suggest that convective initiation is already underway, a couple hours ahead of what the high-res models have been suggesting. A...