- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On April 17 in CHICAGO the average high temperature is 55.5 °F (13.0 °C). The lowest recored high temperature was 35.6 °F (2.0 °C) in 2018 and the highest recored high temperature was 68.5 °F (20.3 °C) in 2024. The high temperature is usually* between 47.6 °F (8.6 °C) and 63.4 °F (17.4 °C). About a quarter of the time, the high temperature is less than 47.6 °F (8.6 °C), and another quarter of the time, the high temperature is greater than and 63.4 °F (17.4 °C). About 95% of the time, the high temperature has been between 32.5 °F (0.3 °C) and 78.5 °F (25.8 °C).
Low Temperatures
On April 17 in CHICAGO the average low temperature is 41.1 °F (5.0 °C). The lowest recored low temperature was 30.7 °F (-0.7 °C) in 2018 and the lowest recored low temperature was 59.4 °F (15.2 °C) in 2024. The low temperature is usually* between 36.6 °F (2.5 °C) and 45.6 °F (7.6 °C). About a quarter of the time, the low temperature is less than 36.6 °F (2.5 °C), and another quarter of the time, the low temperature is greater than and 45.6 °F (7.6 °C). About 95% of the time, the low temperature has been between 28.0 °F (-2.2 °C) and 54.2 °F (12.3 °C).
Frost
On April 17 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 8.7% 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