September 23 - WAUKEGAN HARBOR - Weather History and Averages

Station: WAUKEGAN HARBOR (2006 to 2025)
Country: US
State: IL
Latitude: 42.35
Longitude: -87.82

High Temperatures

On September 23 in WAUKEGAN HARBOR the average high temperature is 70.3 °F (21.3 °C). The lowest recored high temperature was 58.5 °F (14.7 °C) in 2012 and the highest recored high temperature was 86.0 °F (30.0 °C) in 2010. The high temperature is usually^* between 65.1 °F (18.4 °C) and 75.6 °F (24.2 °C). About a quarter of the time, the high temperature is less than 65.1 °F (18.4 °C), and another quarter of the time, the high temperature is greater than and 75.6 °F (24.2 °C). About 95% of the time, the high temperature has been between 55.1 °F (12.9 °C) and 85.5 °F (29.7 °C).

Low Temperatures

On September 23 in WAUKEGAN HARBOR the average low temperature is 58.6 °F (14.8 °C). The lowest recored low temperature was 42.1 °F (5.6 °C) in 2012 and the lowest recored low temperature was 72.0 °F (22.2 °C) in 2017. The low temperature is usually^* between 53.3 °F (11.8 °C) and 63.9 °F (17.7 °C). About a quarter of the time, the low temperature is less than 53.3 °F (11.8 °C), and another quarter of the time, the low temperature is greater than and 63.9 °F (17.7 °C). About 95% of the time, the low temperature has been between 43.2 °F (6.2 °C) and 74.0 °F (23.4 °C).

Frost

On September 23 in WAUKEGAN HARBOR 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:

WAUKEGAN HARBOR — Integrated Surface Dataset (ISD) station ID: 997735 — from year 2007 to 2023

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