About Joliet, IL

Joliet, in Illinois, United States, is home to roughly 148,000 people in the Central Time Zone at 41.5°N latitude.

Across a typical year Joliet sees about 34 inches of precipitation, with May the wettest month and February the driest. Temperatures range from January lows near 19°F up to July highs around 85°F, averaging 52°F annually — characteristic of a humid continental climate.