- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On September 25 in WILMETTE (CGS) the average high temperature is 68.1 °F (20.1 °C). The lowest recored high temperature was 63.0 °F (17.2 °C) in 1987 and the highest recored high temperature was 75.9 °F (24.4 °C) in 1990. The high temperature is usually* between 63.7 °F (17.6 °C) and 72.5 °F (22.5 °C). About a quarter of the time, the high temperature is less than 63.7 °F (17.6 °C), and another quarter of the time, the high temperature is greater than and 72.5 °F (22.5 °C). About 95% of the time, the high temperature has been between 55.4 °F (13.0 °C) and 80.9 °F (27.2 °C).
Low Temperatures
On September 25 in WILMETTE (CGS) the average low temperature is 51.0 °F (10.5 °C). The lowest recored low temperature was 45.9 °F (7.7 °C) in 1989 and the lowest recored low temperature was 57.9 °F (14.4 °C) in 1987. The low temperature is usually* between 46.4 °F (8.0 °C) and 55.5 °F (13.0 °C). About a quarter of the time, the low temperature is less than 46.4 °F (8.0 °C), and another quarter of the time, the low temperature is greater than and 55.5 °F (13.0 °C). About 95% of the time, the low temperature has been between 37.9 °F (3.3 °C) and 64.1 °F (17.8 °C).
Frost
On September 25 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 0.2% 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