March 18 - Chicago - Weather History and Averages

High Temperatures

On March 18 in Chicago, IL (Illinois), USA the average high temperature is 46.8 °F (8.2 °C). The lowest recored high temperature was 28.0 °F (-2.2 °C) in 1950 and the highest recored high temperature was 82.4 °F (28.0 °C) in 2012. The high temperature is usually* between 39.3 °F (4.0 °C) and 54.2 °F (12.3 °C). About a quarter of the time, the high temperature is less than 39.3 °F (4.0 °C), and another quarter of the time, the high temperature is greater than and 54.2 °F (12.3 °C). About 95% of the time, the high temperature has been between 25.1 °F (-3.9 °C) and 68.4 °F (20.2 °C).

Low Temperatures

On March 18 in Chicago, IL (Illinois), USA the average low temperature is 31.3 °F (-0.4 °C). The lowest recored low temperature was 9.0 °F (-12.8 °C) in 1964 and the lowest recored low temperature was 62.6 °F (17.0 °C) in 2012. The low temperature is usually* between 25.6 °F (-3.5 °C) and 37.0 °F (2.8 °C). About a quarter of the time, the low temperature is less than 25.6 °F (-3.5 °C), and another quarter of the time, the low temperature is greater than and 37.0 °F (2.8 °C). About 95% of the time, the low temperature has been between 14.8 °F (-9.6 °C) and 47.9 °F (8.8 °C).

Frost

On March 18 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 53.2% 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: