Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On July 21 in WILMETTE (CGS) the average high temperature is 74.1 °F (23.4 °C). The lowest recored high temperature was 67.8 °F (19.9 °C) in 1989 and the highest recored high temperature was 79.9 °F (26.6 °C) in 1987. The high temperature is usually* between 69.5 °F (20.9 °C) and 78.6 °F (25.9 °C). About a quarter of the time, the high temperature is less than 69.5 °F (20.9 °C), and another quarter of the time, the high temperature is greater than and 78.6 °F (25.9 °C). About 95% of the time, the high temperature has been between 60.9 °F (16.1 °C) and 87.2 °F (30.7 °C).
Low Temperatures
On July 21 in WILMETTE (CGS) the average low temperature is 66.8 °F (19.3 °C). The lowest recored low temperature was 57.9 °F (14.4 °C) in 1990 and the lowest recored low temperature was 70.9 °F (21.6 °C) in 1987. The low temperature is usually* between 63.2 °F (17.4 °C) and 70.3 °F (21.3 °C). About a quarter of the time, the low temperature is less than 63.2 °F (17.4 °C), and another quarter of the time, the low temperature is greater than and 70.3 °F (21.3 °C). About 95% of the time, the low temperature has been between 56.5 °F (13.6 °C) and 77.1 °F (25.1 °C).
Frost
On July 21 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 0.0% 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:
- WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 — from year 1987 to 1990