- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On September 4 in WILMETTE (CGS) the average high temperature is 74.8 °F (23.8 °C). The lowest recored high temperature was 70.0 °F (21.1 °C) in 1987 and the highest recored high temperature was 90.0 °F (32.2 °C) in 1990. The high temperature is usually* between 69.2 °F (20.7 °C) and 80.3 °F (26.8 °C). About a quarter of the time, the high temperature is less than 69.2 °F (20.7 °C), and another quarter of the time, the high temperature is greater than and 80.3 °F (26.8 °C). About 95% of the time, the high temperature has been between 58.7 °F (14.8 °C) and 90.8 °F (32.7 °C).
Low Temperatures
On September 4 in WILMETTE (CGS) the average low temperature is 64.1 °F (17.8 °C). The lowest recored low temperature was 58.8 °F (14.9 °C) in 1988 and the lowest recored low temperature was 67.8 °F (19.9 °C) in 1990. The low temperature is usually* between 60.4 °F (15.8 °C) and 67.8 °F (19.9 °C). About a quarter of the time, the low temperature is less than 60.4 °F (15.8 °C), and another quarter of the time, the low temperature is greater than and 67.8 °F (19.9 °C). About 95% of the time, the low temperature has been between 53.4 °F (11.9 °C) and 74.8 °F (23.8 °C).
Frost
On September 4 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