April 18 - Chicago - Weather History and Averages

High Temperatures

On April 18 in Chicago, IL (Illinois), USA the average high temperature is 61.7 °F (16.5 °C). The lowest recored high temperature was 34.0 °F (1.1 °C) in 1983 and the highest recored high temperature was 89.6 °F (32.0 °C) in 2002. The high temperature is usually* between 53.5 °F (11.9 °C) and 70.0 °F (21.1 °C). About a quarter of the time, the high temperature is less than 53.5 °F (11.9 °C), and another quarter of the time, the high temperature is greater than and 70.0 °F (21.1 °C). About 95% of the time, the high temperature has been between 37.7 °F (3.2 °C) and 85.7 °F (29.8 °C).

Low Temperatures

On April 18 in Chicago, IL (Illinois), USA the average low temperature is 42.1 °F (5.6 °C). The lowest recored low temperature was 25.0 °F (-3.9 °C) in 1983 and the lowest recored low temperature was 68.0 °F (20.0 °C) in 2002. The low temperature is usually* between 36.6 °F (2.6 °C) and 47.7 °F (8.7 °C). About a quarter of the time, the low temperature is less than 36.6 °F (2.6 °C), and another quarter of the time, the low temperature is greater than and 47.7 °F (8.7 °C). About 95% of the time, the low temperature has been between 26.1 °F (-3.3 °C) and 58.2 °F (14.5 °C).

Frost

On April 18 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 10.7% 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: