August 27 - Chicago - Weather History and Averages

High Temperatures

On August 27 in Chicago, IL (Illinois), USA the average high temperature is 82.9 °F (28.3 °C). The lowest recored high temperature was 64.0 °F (17.8 °C) in 1967 and the highest recored high temperature was 99.0 °F (37.2 °C) in 2024. The high temperature is usually* between 78.0 °F (25.5 °C) and 87.8 °F (31.0 °C). About a quarter of the time, the high temperature is less than 78.0 °F (25.5 °C), and another quarter of the time, the high temperature is greater than and 87.8 °F (31.0 °C). About 95% of the time, the high temperature has been between 68.6 °F (20.3 °C) and 97.2 °F (36.2 °C).

Low Temperatures

On August 27 in Chicago, IL (Illinois), USA the average low temperature is 65.8 °F (18.8 °C). The lowest recored low temperature was 50.0 °F (10.0 °C) in 1982 and the lowest recored low temperature was 81.9 °F (27.7 °C) in 1973. The low temperature is usually* between 61.8 °F (16.6 °C) and 69.8 °F (21.0 °C). About a quarter of the time, the low temperature is less than 61.8 °F (16.6 °C), and another quarter of the time, the low temperature is greater than and 69.8 °F (21.0 °C). About 95% of the time, the low temperature has been between 54.3 °F (12.4 °C) and 77.3 °F (25.2 °C).

Frost

On August 27 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: