Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On October 20 in WILMETTE (CGS) the average high temperature is 51.3 °F (10.7 °C). The lowest recored high temperature was 38.8 °F (3.8 °C) in 1989 and the highest recored high temperature was 63.9 °F (17.7 °C) in 1990. The high temperature is usually* between 45.4 °F (7.5 °C) and 57.3 °F (14.0 °C). About a quarter of the time, the high temperature is less than 45.4 °F (7.5 °C), and another quarter of the time, the high temperature is greater than and 57.3 °F (14.0 °C). About 95% of the time, the high temperature has been between 34.2 °F (1.2 °C) and 68.5 °F (20.3 °C).
Low Temperatures
On October 20 in WILMETTE (CGS) the average low temperature is 38.5 °F (3.6 °C). The lowest recored low temperature was 34.9 °F (1.6 °C) in 1989 and the lowest recored low temperature was 46.9 °F (8.3 °C) in 1988. The low temperature is usually* between 33.9 °F (1.1 °C) and 43.2 °F (6.2 °C). About a quarter of the time, the low temperature is less than 33.9 °F (1.1 °C), and another quarter of the time, the low temperature is greater than and 43.2 °F (6.2 °C). About 95% of the time, the low temperature has been between 25.1 °F (-3.9 °C) and 52.0 °F (11.1 °C).
Frost
On October 20 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 17.1% 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