Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On September 23 in WILMETTE (CGS) the average high temperature is 67.0 °F (19.5 °C). The lowest recored high temperature was 55.9 °F (13.3 °C) in 1990 and the highest recored high temperature was 74.8 °F (23.8 °C) in 1988. The high temperature is usually* between 62.4 °F (16.9 °C) and 71.7 °F (22.1 °C). About a quarter of the time, the high temperature is less than 62.4 °F (16.9 °C), and another quarter of the time, the high temperature is greater than and 71.7 °F (22.1 °C). About 95% of the time, the high temperature has been between 53.5 °F (12.0 °C) and 80.6 °F (27.0 °C).
Low Temperatures
On September 23 in WILMETTE (CGS) the average low temperature is 49.5 °F (9.7 °C). The lowest recored low temperature was 37.9 °F (3.3 °C) in 1989 and the lowest recored low temperature was 55.9 °F (13.3 °C) in 1988. The low temperature is usually* between 43.9 °F (6.6 °C) and 55.2 °F (12.9 °C). About a quarter of the time, the low temperature is less than 43.9 °F (6.6 °C), and another quarter of the time, the low temperature is greater than and 55.2 °F (12.9 °C). About 95% of the time, the low temperature has been between 33.1 °F (0.6 °C) and 66.0 °F (18.9 °C).
Frost
On September 23 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 1.8% 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