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City of Decatur, IllinoisDecatur, IL 7-Day Night Weather Forecast
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Decatur, IL Weather Forecast
Decatur, IL Weather Forecast Date: 132 AM CDT Tue Oct 06 2026
The area/counties/county of: Macon, including the city of Decatur.or toggle through each period.
Rest of Tonight... Clear. Near steady temperature in the upper 40s. Southeast winds around 5 mph.
Tuesday... Sunny. Highs in the upper 70s. South winds 5 to 10 mph.
Tuesday Night... Mostly clear. Lows in the mid 50s. South winds 5 to 10 mph.
Wednesday... Sunny. Highs in the mid 80s. West winds 5 to 10 mph.
Wednesday Night... Mostly clear. Lows in the lower 50s. Northwest winds 5 to 10 mph.
Thursday... Mostly clear. Highs in the upper 70s. Lows in the upper 40s.
Friday... Mostly clear. Highs in the upper 70s. Lows in the upper 40s.
Friday Night... Mostly clear. Lows in the lower 50s. Highs in the mid 80s.
Saturday... Mostly clear. Lows in the lower 50s. Highs in the mid 80s.
Saturday Night... Partly cloudy. Lows in the upper 50s. Highs in the lower 80s.
Sunday... Partly cloudy. Lows in the upper 50s. Highs in the lower 80s.
Sunday Night... Mostly clear. Lows in the upper 50s. Highs in the mid 80s.
POP = Probability of Precipitation
Decatur Radar Loop
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