About Cortland, IL

Cortland, in Illinois, United States, is home to roughly 4,300 people in the Central Time Zone at 41.9°N latitude.

Across a typical year Cortland sees about 37 inches of precipitation, with May the wettest month and January the driest. Temperatures range from January lows near 13°F up to July highs around 82°F, averaging 48°F annually — characteristic of a humid continental climate.