“Unsurprisingly to anyone who stepped outside the last few months, summer 2021 in Chicago was warm and humid,” Trent Ford, Illinois state climatologist, wrote in an email to the Tribune. “The average temperature was 75.3 degrees, the eighth highest on record (back to 1873). This compares to 76.7 degrees last summer, which was the warmest summer on record. Four of the top 10 warmest summers on record in Chicago have occurred since 2010 (2010, 2012, 2020, 2021).”
