Roofing in Chicago: Climate & Local Conditions
Among Illinois's largest cities by population (about 2,693,976 residents), Chicago faces above-average annual rainfall (38 inches per year) and bitter winters with January lows averaging 19°F. Chicago's lakefront position produces lake-effect snow that can dump heavy accumulations on rooftops in concentrated events. For roofs, the dominant local concerns are ice dams, lake-effect snow, severe spring storms, and hail.