May 11 - 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 May 11 in WAUKEGAN HARBOR the average high temperature is 57.9 °F (14.4 °C). The lowest recored high temperature was 43.9 °F (6.6 °C) in 2021 and the highest recored high temperature was 73.8 °F (23.2 °C) in 2012. The high temperature is usually^* between 51.7 °F (11.0 °C) and 64.0 °F (17.8 °C). About a quarter of the time, the high temperature is less than 51.7 °F (11.0 °C), and another quarter of the time, the high temperature is greater than and 64.0 °F (17.8 °C). About 95% of the time, the high temperature has been between 40.0 °F (4.5 °C) and 75.7 °F (24.3 °C).

Low Temperatures

On May 11 in WAUKEGAN HARBOR the average low temperature is 45.5 °F (7.5 °C). The lowest recored low temperature was 37.4 °F (3.0 °C) in 2021 and the lowest recored low temperature was 51.8 °F (11.0 °C) in 2007. The low temperature is usually^* between 43.0 °F (6.1 °C) and 48.1 °F (8.9 °C). About a quarter of the time, the low temperature is less than 43.0 °F (6.1 °C), and another quarter of the time, the low temperature is greater than and 48.1 °F (8.9 °C). About 95% of the time, the low temperature has been between 38.1 °F (3.4 °C) and 52.9 °F (11.6 °C).

Frost

On May 11 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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