Chicago - Recent September Temperatures and Rainfall





The numbers here describe what the September weather in Chicago, Illinois was like for every year since 2010. A series of tables gives September data by year for temperature and precipitation.

They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. That's followed by how many really hot days occurred each September. Then there's information on how much rain actually landed this month during recent years, as well as how often Chicago had wet weather.

The climate data come from weather measurements made at Chicago's Midway Airport.

Temperature Weather iconTemperature

September temperature averages by year in Chicago
High °F Low °F Year High °C Low °C
78 62 2018 26 16
80 62 2017 27 17
79 65 2016 26 18
80 63 2015 27 17
75 57 2014 24 14
78 59 2013 25 15
75 56 2012 24 13
71 57 2011 21 14
75 58 2010 24 14
Number of days in September when the temperature in Chicago rose to at least 70 or 90 degrees Fahrenheit
Year 70 °F
21 °C
90 °F
32 °C
2018 23 5
2017 27 7
2016 27 3
2015 27 4
2014 22 0
2013 23 3
2012 22 1
2011 13 2
2010 23 1

Rainy Weather iconRain

This table gives the total precipitation that fell on Chicago during September in each year from 2010. The number of days with precipitation counts the days when rainfall amounted to 0.01 inches (0.3 millimeters) or more.

Total rainfall for September in Chicago
Days Year Inches Milli­metres
10 2018 2.3 58
3 2017 0.6 15
13 2016 2.4 60
6 2015 6.2 156
6 2014 3.1 78
9 2013 1.9 49
10 2012 1.6 41
14 2011 3.9 99
10 2010 1.7 42
Reference

Jay Lawrimore. 2016. Global Summary of the Month, Version 1.0. NOAA National Centers for Environmental Information. 

Chicago - Recent Years
Chicago - Extremes
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