ClimateAverages

Chicago Weather in September

JanFebMarAprMayJunJulAugSepOctNovDec
Right now
23°C
Partly cloudy · feels like 26°C
Humidity
85%
Wind
10 kph SSW
UV
0.1
Rain
0%
Updated Jul 9, 06:45 AMWeather data by WeatherAPI.com
September daytime high
23.3°C
September overnight low
13.4°C
September average
18.3°C

In September, Chicago typically sees daytime highs of 23.3°C and overnight lows around 13.4°C. Compared to the annual average high of 14.1°C, September runs +9.2°C.

vs. annual avg high
+9.2°C
Rank among 12 months
#4 warmest
Hottest year overall
2011

Where September ranks in Chicago

JanFebMarAprMayJunJulAugSep23°OctNovDec

FAQ

What is the average temperature in Chicago in September?

September in Chicago averages a daytime high of 23.3°C and an overnight low of 13.4°C.

Is September warm or cold in Chicago?

September runs +9.2°C compared to Chicago's annual average high of 14.1°C, ranking #4 of 12 months by warmth.

What should I pack for Chicago in September?

Plan for daytime highs near 23.3°C and cooler evenings around 13.4°C.

Other months for Chicago

JanuaryFebruaryMarchAprilMayJuneJulyAugustOctoberNovemberDecember

September in nearby cities

AuroraRockfordJolietNapervilleSpringfieldPeoriaNorth PeoriaElginWaukeganChampaignCiceroBloomington