May 30 - 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 30 in WAUKEGAN HARBOR the average high temperature is 70.0 °F (21.1 °C). The lowest recored high temperature was 57.4 °F (14.1 °C) in 2014 and the highest recored high temperature was 81.3 °F (27.4 °C) in 2011. The high temperature is usually^* between 63.8 °F (17.7 °C) and 76.1 °F (24.5 °C). About a quarter of the time, the high temperature is less than 63.8 °F (17.7 °C), and another quarter of the time, the high temperature is greater than and 76.1 °F (24.5 °C). About 95% of the time, the high temperature has been between 52.1 °F (11.2 °C) and 87.8 °F (31.0 °C).

Low Temperatures

On May 30 in WAUKEGAN HARBOR the average low temperature is 54.2 °F (12.3 °C). The lowest recored low temperature was 44.1 °F (6.7 °C) in 2015 and the lowest recored low temperature was 63.1 °F (17.3 °C) in 2016. The low temperature is usually^* between 49.7 °F (9.9 °C) and 58.6 °F (14.8 °C). About a quarter of the time, the low temperature is less than 49.7 °F (9.9 °C), and another quarter of the time, the low temperature is greater than and 58.6 °F (14.8 °C). About 95% of the time, the low temperature has been between 41.3 °F (5.2 °C) and 67.0 °F (19.4 °C).

Frost

On May 30 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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