Chicago Weather Overview

Chicago has an extreme climate with very hot summers and bitterly cold winters, its lakeside setting only slightly moderating the temperatures and adding some humidity to the atmosphere. Chicago has distinct seasons, with a short spring, when temperatures are moderate and nights frosty. Summers are hot, sunny and humid, from June to the end of September, with cool evenings when breezes blow in from Lake Michigan. Autumn is a lovely time of year when the air is crisp and cool, with blue skies and sunshine. Winters in Chicago are icy and prone to cold, harsh winds. Snow is common, and it is also very rainy during the winter months.

Average Annual Temperatures in Chicago