Waukegan, IL Weather

Waukegan is located within the humid continental climate zone with warm to hot (and often humid) summers, and cold and snowy winters. The record high temperature is 108 °F (42 °C), which was set in July 1934, while the record low is −27 °F (−33 °C), set in January 1985. Waukegan’s proximity to Lake Michigan helps cool the city throughout the year.