Cortland, IL Weather Forecast
DeKalb County, Illinois
Live radar, warnings and storm tracking for Cortland, 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 Cortland
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Cortland, IL at a glance
Cortland is home to about 4,488 people in DeKalb County, across 3.6 square miles. It ranks 352nd by population of 441 places in Illinois with a forecast here. The nearest neighbour with its own forecast is DeKalb, 3 miles away.
- County
- DeKalb County
- Population
- 4,488 2023 est.
- Land area
- 3.6 sq mi
- People per sq mi
- 1,249
- Forecast point
- 41.9372°N, 88.6893°W
How well can the network see Cortland?
The nearest Doppler radar is KLOT (Chicago, IL), to the SE. Its lowest scan passes about 2,500 ft above Cortland. Close enough to see rotation in the low part of a storm, where tornadoes form. Cortland is closer to its radar than 58% of US cities.
The closest weather station is KDKB (DeKalb/Taylor Muni). Close enough that its readings are the conditions in town.
Forecasts near Cortland
- DeKalb, IL3 mi
- Sycamore, IL4 mi
- Genoa, IL11 mi
- Elburn, IL12 mi
- Campton Hills, IL14 mi
- Hampshire, IL16 mi
- Pingree Grove, IL17 mi
- Sugar Grove, IL17 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →