Weather in Decatur, IL
Updated 2026-08-11 11:00 local time · ZIP codes 62521, 62522, 62523, 62526
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
84°3% rain98°2% rain98°2% rain98°2% rain96°2% rain93°2% rain94°1% rain93°2% rain89°2% rain
85°4% rain83°5% rain82°6% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 6%).
It feels like 88°F with winds near 14 mph.
85°F, 4% rain chance and 9 mph wind.
Visibility is around 10 mi; gusts may reach 23 mph.
Current temperature is 84°F, wind 14 mph, rain chance up to 6%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Decatur weather today
Sunny and 84°F in Decatur, IL. Today's high is 98°F with a 5% rain chance. Winds are around 14 mph with gusts near 18 mph. Relative humidity is 70%, pressure is 29.96 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Decatur
Sunrise is at 06:04 AM and sunset is at 07:57 PM. Tomorrow's forecast calls for Sunny with a high near 80°F and a low near 70°F. The maximum rain chance is 67%.