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Weather in September in Chicago, Illinois

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< September >
 
Normal Max/ High Temperature 24°C (75°F)
 
Average Temperature 19°C (66°F)
 
Min/ Low Temperature 14°C (57°F)
 
Normal Precipitation 69mm (2.7in)
Number of Wet Days (probability of rain on a day) 8 (27%)
Average Sunlight per day 07:56
Average Daylight per day 12:26
Sunny (Cloudy) Daylight Hours 65% (35%)
Sun altitude at solar noon on the 21st day.
48.7°


  • The average temperature in Chicago, Illinois in September is somewhat warm at 19 °C (66.2 °F).
  • Afternoons can be fairly hot with average high temperatures reaching 24 °C (75.2 °F).
  • Overnight temperatures are generally mild with an average low of 14 °C (57.2 °F).
  • The range/ variation of daily mean temperatures in September is 10 °C (18 °F).
  • The weather in September is marginally dry with intermittent rain. Only 69mm (2.7in) of liquid is deposited during on average 8 days.
  • In September the heavens above Chicago, Illinois are slightly sunny with on balance a pleasing 7:56 of gorgeous sunshine daily.
  • The shortest day is 11:44 long and the longest day is 13:07 long with an average length of 12:26.
  • There are approximately 4:19 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
  • It is sunny approximately 64.7% of daylight hours and cloudy 35.3% of daylight hours.

Check the distance to and compare the Chicago, Illinois September averages with somewhere beginning with:

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Weather Trend Graph for September in Chicago, Illinois, Usa

Graph of weather in Chicago, Illinois in September

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