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Typical weather in Chicago, IL (Illinois), USA on March 21

High Temperatures

On March 21 in Chicago, IL (Illinois), USA the average high temperature is 48.3 °F (9.1 °C). The lowest recored high temperature was 19.9 °F (-6.7 °C) in 1965 and the highest recored high temperature was 87.8 °F (31.0 °C) in 2012. The high temperature is usually* between 40.4 °F (4.7 °C) and 56.2 °F (13.4 °C). About a quarter of the time, the high temperature is less than 40.4 °F (4.7 °C), and another quarter of the time, the high temperature is greater than and 56.2 °F (13.4 °C). About 95% of the time, the high temperature has been between 25.5 °F (-3.6 °C) and 71.1 °F (21.7 °C).

Low Temperatures

On March 21 in Chicago, IL (Illinois), USA the average low temperature is 32.1 °F (0.1 °C). The lowest recored low temperature was 8.1 °F (-13.3 °C) in 1986 and the lowest recored low temperature was 68.0 °F (20.0 °C) in 2012. The low temperature is usually* between 26.3 °F (-3.2 °C) and 38.0 °F (3.3 °C). About a quarter of the time, the low temperature is less than 26.3 °F (-3.2 °C), and another quarter of the time, the low temperature is greater than and 38.0 °F (3.3 °C). About 95% of the time, the low temperature has been between 15.1 °F (-9.4 °C) and 49.2 °F (9.6 °C).

Frost

On March 21 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 49.3% 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: