June 21 - 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 June 21 in WAUKEGAN HARBOR the average high temperature is 78.3 °F (25.7 °C). The lowest recored high temperature was 64.0 °F (17.8 °C) in 2014 and the highest recored high temperature was 97.0 °F (36.1 °C) in 2022. The high temperature is usually^* between 72.3 °F (22.4 °C) and 84.2 °F (29.0 °C). About a quarter of the time, the high temperature is less than 72.3 °F (22.4 °C), and another quarter of the time, the high temperature is greater than and 84.2 °F (29.0 °C). About 95% of the time, the high temperature has been between 61.0 °F (16.1 °C) and 95.6 °F (35.3 °C).

Low Temperatures

On June 21 in WAUKEGAN HARBOR the average low temperature is 63.3 °F (17.4 °C). The lowest recored low temperature was 54.5 °F (12.5 °C) in 2014 and the lowest recored low temperature was 73.0 °F (22.8 °C) in 2022. The low temperature is usually^* between 59.4 °F (15.2 °C) and 67.3 °F (19.6 °C). About a quarter of the time, the low temperature is less than 59.4 °F (15.2 °C), and another quarter of the time, the low temperature is greater than and 67.3 °F (19.6 °C). About 95% of the time, the low temperature has been between 51.9 °F (11.0 °C) and 74.8 °F (23.8 °C).

Frost

On June 21 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 2025

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