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City of Mattoon, IllinoisMattoon, IL 7-Day Weather Forecast
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Mattoon Weather Forecast
Mattoon, IL Weather Forecast Date: 937 AM CDT Sat Sep 05 2026
Weather forecast for Mattoon, IL
Today Hi: 95°FHi: 35°C Lo: 69°F Lo: 21°C |
Rest of Today... Sunny, hot with highs in the mid 90s. Northwest winds 5 to 10 mph. Heat index values up to 104. |
| Sun Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Sunday... Sunny. Not as warm with highs in the mid 80s. Northeast winds around 10 mph. |
| Labor Day Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Labor Day... Sunny. Highs in the mid 80s. East winds 5 to 10 mph. |
| Tue Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Tuesday... Mostly clear. Lows in the lower 60s. Highs in the lower 90s. |
| Wed Hi: 99°FHi: 37°C Lo: 69°F Lo: 21°C |
Wednesday... Mostly clear. Hot. Lows in the lower 70s. Highs in the upper 90s. |
Thu Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Thursday... Mostly sunny. A chance of showers in the morning. Not as warm with highs in the mid 80s. Chance of rain 40%. |
| Fri Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Friday... Mostly clear. Lows in the lower 60s. Highs in the mid 80s. |
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