Chicago: How often is it Above 100°F?

Weather Analysis for Chicago

Over the course of 1950 to 2021, the weather trends in Chicago regarding the number of days above 100°F have remained relatively mild. On average, there have been 2.25 days per year where the temperature soared past the scorching 100°F mark. However, the year 1988 stands out as the most extreme in this regard, with Chicago experiencing 6 days of sweltering heat. Overall, while Chicago does see some hot weather, it is usually limited to a handful of days each year.