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Now · 2:50 AM

48°

Clear · Feels like 46°

Dry for the next 24 hours. Tomorrow’s high 82°.

Rain in the next hour

High: 85°
Low: 50°
Rain: 4%
Sunset: 6:27 PM

About Decatur weather

Decatur is in Macon County, Illinois, United States at 39.84°, -88.95°. Right now it’s 48° and clear; today’s high is 85° with a 4% chance of rain.

Illinois has a humid continental climate with distinct seasons marked by cold, snowy winters and hot, humid summers. The state's flat terrain allows weather systems to move across without obstruction, leading to rapid temperature changes. Chicago's position on Lake Michigan creates a unique lake-effect weather pattern that can moderate summer heat and intensify winter snowfall.