South Chicago Heights IL Weather The Weather ChannelWeather conditions for Chicago Heights can be varying occasionally. The weather can range from extreme heat waves in the summer to bitterly cold winters with heavy snowfall. It is constantly essential to be ready to face a variety of weather conditions in Chicago Heights. Remain informed about current atmospheric prediction to prepare your daily routines appropriately and attire suitably. Keep safe and enjoy the varied meteorological experiences that are Chicago Heights has to offer.