September 1 - CHICAGO - Weather History and Averages

Station: CHICAGO (2005 to 2025)
Country: US
State: IL
Latitude: 42.0
Longitude: -87.5

High Temperatures

On September 1 in CHICAGO the average high temperature is 77.2 °F (25.1 °C). The lowest recored high temperature was 63.7 °F (17.6 °C) in 2009 and the highest recored high temperature was 91.8 °F (33.2 °C) in 2011. The high temperature is usually^* between 72.4 °F (22.5 °C) and 82.0 °F (27.8 °C). About a quarter of the time, the high temperature is less than 72.4 °F (22.5 °C), and another quarter of the time, the high temperature is greater than and 82.0 °F (27.8 °C). About 95% of the time, the high temperature has been between 63.4 °F (17.4 °C) and 91.0 °F (32.8 °C).

Low Temperatures

On September 1 in CHICAGO the average low temperature is 68.7 °F (20.4 °C). The lowest recored low temperature was 59.0 °F (15.0 °C) in 2017 and the lowest recored low temperature was 73.4 °F (23.0 °C) in 2011. The low temperature is usually^* between 65.8 °F (18.8 °C) and 71.6 °F (22.0 °C). About a quarter of the time, the low temperature is less than 65.8 °F (18.8 °C), and another quarter of the time, the low temperature is greater than and 71.6 °F (22.0 °C). About 95% of the time, the low temperature has been between 60.3 °F (15.7 °C) and 77.1 °F (25.0 °C).

Frost

On September 1 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 0.0% of the time.

^{Usually* in this context means around 50% of the
time, assuming a normal distribution of values.}

Data Source(s)

The data used to compute the average high/low temperatures for this location were taken from the following stations:

CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2007 to 2024

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