Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On September 18 in WILMETTE (CGS) the average high temperature is 70.4 °F (21.4 °C). The lowest recored high temperature was 68.9 °F (20.5 °C) in 1990 and the highest recored high temperature was 79.9 °F (26.6 °C) in 1988. The high temperature is usually* between 65.1 °F (18.4 °C) and 75.8 °F (24.3 °C). About a quarter of the time, the high temperature is less than 65.1 °F (18.4 °C), and another quarter of the time, the high temperature is greater than and 75.8 °F (24.3 °C). About 95% of the time, the high temperature has been between 54.9 °F (12.7 °C) and 85.9 °F (30.0 °C).
Low Temperatures
On September 18 in WILMETTE (CGS) the average low temperature is 58.5 °F (14.7 °C). The lowest recored low temperature was 49.8 °F (9.9 °C) in 1990 and the lowest recored low temperature was 66.9 °F (19.4 °C) in 1988. The low temperature is usually* between 53.9 °F (12.2 °C) and 63.2 °F (17.3 °C). About a quarter of the time, the low temperature is less than 53.9 °F (12.2 °C), and another quarter of the time, the low temperature is greater than and 63.2 °F (17.3 °C). About 95% of the time, the low temperature has been between 45.0 °F (7.2 °C) and 72.0 °F (22.2 °C).
Frost
On September 18 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