July 30 - Chicago - Weather History and Averages

High Temperatures

On July 30 in Chicago, IL (Illinois), USA the average high temperature is 83.0 °F (28.3 °C). The lowest recored high temperature was 65.8 °F (18.8 °C) in 1992 and the highest recored high temperature was 104.0 °F (40.0 °C) in 1999. The high temperature is usually* between 78.9 °F (26.0 °C) and 87.2 °F (30.7 °C). About a quarter of the time, the high temperature is less than 78.9 °F (26.0 °C), and another quarter of the time, the high temperature is greater than and 87.2 °F (30.7 °C). About 95% of the time, the high temperature has been between 70.9 °F (21.6 °C) and 95.1 °F (35.1 °C).

Low Temperatures

On July 30 in Chicago, IL (Illinois), USA the average low temperature is 66.3 °F (19.0 °C). The lowest recored low temperature was 50.0 °F (10.0 °C) in 1984 and the lowest recored low temperature was 86.0 °F (30.0 °C) in 1999. The low temperature is usually* between 62.6 °F (17.0 °C) and 69.9 °F (21.1 °C). About a quarter of the time, the low temperature is less than 62.6 °F (17.0 °C), and another quarter of the time, the low temperature is greater than and 69.9 °F (21.1 °C). About 95% of the time, the low temperature has been between 55.6 °F (13.1 °C) and 76.9 °F (24.9 °C).

Frost

On July 30 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: