August 15 - Chicago - Weather History and Averages

High Temperatures

On August 15 in Chicago, IL (Illinois), USA the average high temperature is 81.9 °F (27.7 °C). The lowest recored high temperature was 66.9 °F (19.4 °C) in 1979 and the highest recored high temperature was 98.1 °F (36.7 °C) in 1987. The high temperature is usually* between 78.0 °F (25.6 °C) and 85.8 °F (29.9 °C). About a quarter of the time, the high temperature is less than 78.0 °F (25.6 °C), and another quarter of the time, the high temperature is greater than and 85.8 °F (29.9 °C). About 95% of the time, the high temperature has been between 70.6 °F (21.5 °C) and 93.2 °F (34.0 °C).

Low Temperatures

On August 15 in Chicago, IL (Illinois), USA the average low temperature is 65.2 °F (18.5 °C). The lowest recored low temperature was 41.4 °F (5.2 °C) in 1964 and the lowest recored low temperature was 81.0 °F (27.2 °C) in 1988. The low temperature is usually* between 61.4 °F (16.4 °C) and 69.1 °F (20.6 °C). About a quarter of the time, the low temperature is less than 61.4 °F (16.4 °C), and another quarter of the time, the low temperature is greater than and 69.1 °F (20.6 °C). About 95% of the time, the low temperature has been between 54.2 °F (12.3 °C) and 76.3 °F (24.6 °C).

Frost

On August 15 in Chicago, IL (Illinois), USA 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: