Weather in Decatur, Illinois
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 05:04 PM ET · Refreshes every hour
79°F
Clear sky
Feels like 78°F
41%
Humidity
8 mph
Wind Speed
About Weather in Decatur
Decatur is located in Illinois (coordinates: 39.855983°N, 88.933746°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.