Chicago Heights IL Climate Averages Monthly Weather ConditionsThe climate for Chicago Heights are unpredictable at times. The weather can vary from hazardous heat waves in the summer to extremely cold wintry that include significant snowfall. It's always crucial to be prepared to face a variety of climate conditions in Chicago Heights. Remain up-to-date about current weather prediction in order to prepare your activities appropriately and dress suitably. Stay safe and enjoy the varied weather experiences that are Chicago Heights has to offer.