Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On September 26 in WILMETTE (CGS) the average high temperature is 71.4 °F (21.9 °C). The lowest recored high temperature was 63.9 °F (17.7 °C) in 1989 and the highest recored high temperature was 79.0 °F (26.1 °C) in 1988. The high temperature is usually* between 66.3 °F (19.1 °C) and 76.5 °F (24.7 °C). About a quarter of the time, the high temperature is less than 66.3 °F (19.1 °C), and another quarter of the time, the high temperature is greater than and 76.5 °F (24.7 °C). About 95% of the time, the high temperature has been between 56.7 °F (13.7 °C) and 86.1 °F (30.0 °C).
Low Temperatures
On September 26 in WILMETTE (CGS) the average low temperature is 53.5 °F (11.9 °C). The lowest recored low temperature was 48.9 °F (9.4 °C) in 1989 and the lowest recored low temperature was 59.9 °F (15.5 °C) in 1990. The low temperature is usually* between 48.7 °F (9.3 °C) and 58.3 °F (14.6 °C). About a quarter of the time, the low temperature is less than 48.7 °F (9.3 °C), and another quarter of the time, the low temperature is greater than and 58.3 °F (14.6 °C). About 95% of the time, the low temperature has been between 39.6 °F (4.2 °C) and 67.3 °F (19.6 °C).
Frost
On September 26 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 0.1% 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