Decatur, IL Weather Forecast
Macon County, Illinois
Live radar, warnings and storm tracking for Decatur, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Decatur
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Decatur, IL at a glance
Decatur is home to about 68,670 people in Macon County, across 43 square miles. It ranks 17th by population of 441 places in Illinois with a forecast here. The nearest neighbour with its own forecast is Forsyth, 5 miles away.
- County
- Macon County
- Population
- 68,670 2023 est.
- Land area
- 43 sq mi
- People per sq mi
- 1,579
- Forecast point
- 39.8560°N, 88.9337°W
How well can the network see Decatur?
The nearest Doppler radar is KILX (Lincoln, IL), to the NW. Its lowest scan passes about 1,800 ft above Decatur. That is about as close as US radar coverage gets: low-level rotation and gust fronts over Decatur show up clearly. Decatur is closer to its radar than 71% of US cities.
The closest weather station is KDEC (Decatur Arpt). Close enough that its readings are the conditions in town.
Forecasts near Decatur
- Forsyth, IL5 mi
- Mount Zion, IL6 mi
- Clinton, IL20 mi
- Monticello, IL23 mi
- Sullivan, IL25 mi
- Taylorville, IL28 mi
- Lincoln, IL31 mi
- Shelbyville, IL32 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →