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Typical weather at station GARY/CHICAGO AIRPORT on September 20

Station information

High Temperatures

On September 20 in <NA> the average high temperature is 75.6 °F (24.2 °C). The lowest recored high temperature was 59.0 °F (15.0 °C) in 1991 and the highest recored high temperature was 93.2 °F (34.0 °C) in 2018. The high temperature is usually* between 69.5 °F (20.8 °C) and 81.8 °F (27.7 °C). About a quarter of the time, the high temperature is less than 69.5 °F (20.8 °C), and another quarter of the time, the high temperature is greater than and 81.8 °F (27.7 °C). About 95% of the time, the high temperature has been between 57.7 °F (14.3 °C) and 93.6 °F (34.2 °C).

Low Temperatures

On September 20 in <NA> the average low temperature is 57.3 °F (14.1 °C). The lowest recored low temperature was 40.3 °F (4.6 °C) in 2020 and the lowest recored low temperature was 69.8 °F (21.0 °C) in 2002. The low temperature is usually* between 52.1 °F (11.2 °C) and 62.5 °F (17.0 °C). About a quarter of the time, the low temperature is less than 52.1 °F (11.2 °C), and another quarter of the time, the low temperature is greater than and 62.5 °F (17.0 °C). About 95% of the time, the low temperature has been between 42.2 °F (5.7 °C) and 72.5 °F (22.5 °C).

Frost

On September 20 in <NA> expect the temperatures to drop below freezing for a risk of frost about 0.1% of the time.

Data Source(s)

The data used to compute the average high/low temperatures for this location were taken from the following stations: