December 20 - 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 December 20 in WAUKEGAN HARBOR the average high temperature is 35.5 °F (1.9 °C). The lowest recored high temperature was 28.0 °F (-2.2 °C) in 2010 and the highest recored high temperature was 50.2 °F (10.1 °C) in 2015. The high temperature is usually^* between 30.8 °F (-0.7 °C) and 40.2 °F (4.6 °C). About a quarter of the time, the high temperature is less than 30.8 °F (-0.7 °C), and another quarter of the time, the high temperature is greater than and 40.2 °F (4.6 °C). About 95% of the time, the high temperature has been between 21.8 °F (-5.7 °C) and 49.2 °F (9.5 °C).

Low Temperatures

On December 20 in WAUKEGAN HARBOR the average low temperature is 25.9 °F (-3.4 °C). The lowest recored low temperature was 12.2 °F (-11.0 °C) in 2010 and the lowest recored low temperature was 36.1 °F (2.3 °C) in 2011. The low temperature is usually^* between 19.0 °F (-7.2 °C) and 32.7 °F (0.4 °C). About a quarter of the time, the low temperature is less than 19.0 °F (-7.2 °C), and another quarter of the time, the low temperature is greater than and 32.7 °F (0.4 °C). About 95% of the time, the low temperature has been between 6.1 °F (-14.4 °C) and 45.7 °F (7.6 °C).

Frost

On December 20 in WAUKEGAN HARBOR expect the temperatures to drop below freezing for a risk of frost about 72.8% 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 2006 to 2024

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