Chicago IL United States 10Day Weather Forecast The The weather in Chicago Heights can be fluctuating from time to time. The weather can vary between extreme heat waves in the summer to extremely cold winters with heavy snowfall. It's consistently crucial being prepared to face a variety of weather conditions in Chicago Heights. Remain up-to-date about current weather prediction in order to prepare your activities appropriately and dress appropriately. Stay safe and make the most of the diverse weather experiences that Chicago Heights has to offer.