Chicago Heights IL 10Day Weather Forecast The Weather The atmospheric conditions for Chicago Heights are unpredictable at times. The weather can vary from hazardous heat waves in the summer to extremely cold wintry with significant snowfall. It's consistently crucial to be prepared to face a variety of climate conditions within Chicago Heights. Remain updated about the atmospheric forecast in order to prepare your daily routines accordingly and attire suitably. Keep safe and enjoy the varied meteorological experiences that Chicago Heights has to offer.