July 20 - Chicago - Weather History and Averages

High Temperatures

On July 20 in Chicago, IL (Illinois), USA the average high temperature is 84.3 °F (29.0 °C). The lowest recored high temperature was 62.1 °F (16.7 °C) in 1950 and the highest recored high temperature was 100.9 °F (38.3 °C) in 1980. The high temperature is usually* between 79.9 °F (26.6 °C) and 88.7 °F (31.5 °C). About a quarter of the time, the high temperature is less than 79.9 °F (26.6 °C), and another quarter of the time, the high temperature is greater than and 88.7 °F (31.5 °C). About 95% of the time, the high temperature has been between 71.5 °F (21.9 °C) and 97.1 °F (36.2 °C).

Low Temperatures

On July 20 in Chicago, IL (Illinois), USA the average low temperature is 67.5 °F (19.7 °C). The lowest recored low temperature was 53.1 °F (11.7 °C) in 1951 and the lowest recored low temperature was 80.1 °F (26.7 °C) in 1983. The low temperature is usually* between 63.8 °F (17.7 °C) and 71.3 °F (21.8 °C). About a quarter of the time, the low temperature is less than 63.8 °F (17.7 °C), and another quarter of the time, the low temperature is greater than and 71.3 °F (21.8 °C). About 95% of the time, the low temperature has been between 56.6 °F (13.7 °C) and 78.4 °F (25.8 °C).

Frost

On July 20 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: