- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On June 17 in WILMETTE (CGS) the average high temperature is 73.5 °F (23.1 °C). The lowest recored high temperature was 65.8 °F (18.8 °C) in 1988 and the highest recored high temperature was 84.9 °F (29.4 °C) in 1990. The high temperature is usually* between 68.7 °F (20.4 °C) and 78.3 °F (25.7 °C). About a quarter of the time, the high temperature is less than 68.7 °F (20.4 °C), and another quarter of the time, the high temperature is greater than and 78.3 °F (25.7 °C). About 95% of the time, the high temperature has been between 59.6 °F (15.3 °C) and 87.5 °F (30.8 °C).
Low Temperatures
On June 17 in WILMETTE (CGS) the average low temperature is 62.1 °F (16.7 °C). The lowest recored low temperature was 52.9 °F (11.6 °C) in 1989 and the lowest recored low temperature was 70.0 °F (21.1 °C) in 1990. The low temperature is usually* between 57.8 °F (14.3 °C) and 66.5 °F (19.1 °C). About a quarter of the time, the low temperature is less than 57.8 °F (14.3 °C), and another quarter of the time, the low temperature is greater than and 66.5 °F (19.1 °C). About 95% of the time, the low temperature has been between 49.5 °F (9.7 °C) and 74.7 °F (23.7 °C).
Frost
On June 17 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