About Somonauk, IL

Somonauk, in Illinois, United States, is home to roughly 1,900 people in the Central Time Zone at 41.6°N latitude.

Across a typical year Somonauk sees about 34 inches of precipitation, with May the wettest month and January the driest. Temperatures range from January lows near 15°F up to July highs around 84°F, averaging 49°F annually — characteristic of a humid continental climate.