September - WAUKEGAN HARBOR - Weather History and Averages

High Temperatures

On average, the day in September with the warmest high temperature in WAUKEGAN HARBOR is September 2 at an average of 77.4 °F (25.2 °C).

On average, the day in September with the coldest high temperature in WAUKEGAN HARBOR is September 30 at an average of 64.9 °F (18.3 °C).

The warmest recorded high temperature in September in WAUKEGAN HARBOR was 92.8 °F (33.8 °C) on September 10 in the year 2013 at WAUKEGAN HARBOR — Integrated Surface Dataset (ISD) station ID: 997735 .

The coldest recorded high temperature in September in WAUKEGAN HARBOR was 51.4 °F (10.8 °C) on September 12 in the year 2014 at WAUKEGAN HARBOR — Integrated Surface Dataset (ISD) station ID: 997735 .

On average, the day in September with the warmest low temperature in WAUKEGAN HARBOR is September 2 at an average of 65.5 °F (18.6 °C).

On average, the day in September with the coldest low temperature in WAUKEGAN HARBOR is September 30 at an average of 54.5 °F (12.5 °C).

The warmest recorded low temperature in WAUKEGAN HARBOR was 79.3 °F (26.3 °C) on September 10 in the year 2013 at WAUKEGAN HARBOR — Integrated Surface Dataset (ISD) station ID: 997735 .

The coldest recorded low temperature in WAUKEGAN HARBOR was 40.8 °F (4.9 °C) on September 13 in the year 2014 at WAUKEGAN HARBOR — Integrated Surface Dataset (ISD) station ID: 997735 .

If you would like to see the temperatures for specific days, you can click on the corresponding links below: