Chicago weather in October 2024

Expect 17°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Chicago in October. Check more long-term weather averages for Chicago in October before you book your next holiday to Illinois in 2024/2025.

  • 17°C maximum daytime temperature in October in Chicago17
    17°C max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in October in Chicago9
    9 days with some rainfall
  • 6°C minimum night-time temperature in October in Chicago6
    6°C min night temperature
  • 11 hours of daylight per day in October in Chicago11
    11 hours of daylight per day
  • No heat & humidity in October in Chicago0
    No heat & humidity
  • 68 mm monthly rainfall in October in Chicago68
    68 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in October in Chicago4
    4 (Moderate) UV index
  • 14°C sea temperature in October in Chicago14
    14°C sea temperature

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