Station information
- Integrated Surface Dataset (ISD) station ID: 725340
- Weather Bureau Army Navy (WBAN): 14819
- Country: US
- State: IL
- Latitude: 41.786
- Longitude: -87.752
High Temperatures
On May 21 in CHICAGO MIDWAY INTL ARPT the average high temperature is 74.7 °F (23.7 °C). The lowest recored high temperature was 54.0 °F (12.2 °C) in 2019 and the highest recored high temperature was 95.0 °F (35.0 °C) in 1977. The high temperature is usually* between 68.0 °F (20.0 °C) and 81.3 °F (27.4 °C). About a quarter of the time, the high temperature is less than 68.0 °F (20.0 °C), and another quarter of the time, the high temperature is greater than and 81.3 °F (27.4 °C). About 95% of the time, the high temperature has been between 55.3 °F (12.9 °C) and 94.1 °F (34.5 °C).
Low Temperatures
On May 21 in CHICAGO MIDWAY INTL ARPT the average low temperature is 53.6 °F (12.0 °C). The lowest recored low temperature was 35.6 °F (2.0 °C) in 2002 and the lowest recored low temperature was 68.9 °F (20.5 °C) in 1977. The low temperature is usually* between 48.4 °F (9.1 °C) and 58.8 °F (14.9 °C). About a quarter of the time, the low temperature is less than 48.4 °F (9.1 °C), and another quarter of the time, the low temperature is greater than and 58.8 °F (14.9 °C). About 95% of the time, the low temperature has been between 38.6 °F (3.7 °C) and 68.6 °F (20.4 °C).
Frost
On May 21 in CHICAGO MIDWAY INTL ARPT expect the temperatures to drop below freezing for a risk of frost about 0.2% 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:
- CHICAGO MIDWAY INTL ARPT — Integrated Surface Dataset (ISD) station ID: 725340 — Weather Bureau Army Navy (WBAN): 14819 — from year 1973 to 2025
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— Weather Bureau Army Navy (WBAN): 14819 — from year 1948 to 1972