Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On May 19 in CHICAGO the average high temperature is 66.0 °F (18.9 °C). The lowest recored high temperature was 50.2 °F (10.1 °C) in 2025 and the highest recored high temperature was 84.2 °F (29.0 °C) in 2024. The high temperature is usually* between 58.2 °F (14.6 °C) and 73.7 °F (23.2 °C). About a quarter of the time, the high temperature is less than 58.2 °F (14.6 °C), and another quarter of the time, the high temperature is greater than and 73.7 °F (23.2 °C). About 95% of the time, the high temperature has been between 43.5 °F (6.4 °C) and 88.4 °F (31.3 °C).
Low Temperatures
On May 19 in CHICAGO the average low temperature is 52.4 °F (11.4 °C). The lowest recored low temperature was 42.4 °F (5.8 °C) in 2015 and the lowest recored low temperature was 64.6 °F (18.1 °C) in 2024. The low temperature is usually* between 47.7 °F (8.7 °C) and 57.1 °F (14.0 °C). About a quarter of the time, the low temperature is less than 47.7 °F (8.7 °C), and another quarter of the time, the low temperature is greater than and 57.1 °F (14.0 °C). About 95% of the time, the low temperature has been between 38.7 °F (3.7 °C) and 66.1 °F (19.0 °C).
Frost
On May 19 in CHICAGO 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 — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 to 2025