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Typical weather in Chicago, IL (Illinois), USA on July 30

High Temperatures

On July 30 in Chicago, IL (Illinois), USA the average high temperature is 82.8 °F (28.2 °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 78.3 °F (25.7 °C) and 87.3 °F (30.7 °C). About a quarter of the time, the high temperature is less than 78.3 °F (25.7 °C), and another quarter of the time, the high temperature is greater than and 87.3 °F (30.7 °C). About 95% of the time, the high temperature has been between 69.8 °F (21.0 °C) and 95.9 °F (35.5 °C).

Low Temperatures

On July 30 in Chicago, IL (Illinois), USA the average low temperature is 66.5 °F (19.2 °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 62.5 °F (16.9 °C) and 70.6 °F (21.4 °C). About a quarter of the time, the low temperature is less than 62.5 °F (16.9 °C), and another quarter of the time, the low temperature is greater than and 70.6 °F (21.4 °C). About 95% of the time, the low temperature has been between 54.7 °F (12.6 °C) and 78.3 °F (25.7 °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: