- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On December 21 in WILMETTE (CGS) the average high temperature is 37.5 °F (3.1 °C). The lowest recored high temperature was 36.0 °F (2.2 °C) in 1988 and the highest recored high temperature was 47.8 °F (8.8 °C) in 1990. The high temperature is usually* between 28.1 °F (-2.2 °C) and 46.9 °F (8.3 °C). About a quarter of the time, the high temperature is less than 28.1 °F (-2.2 °C), and another quarter of the time, the high temperature is greater than and 46.9 °F (8.3 °C). About 95% of the time, the high temperature has been between 10.1 °F (-12.1 °C) and 64.9 °F (18.3 °C).
Low Temperatures
On December 21 in WILMETTE (CGS) the average low temperature is 24.5 °F (-4.1 °C). The lowest recored low temperature was 28.0 °F (-2.2 °C) in 1987 and the lowest recored low temperature was 32.0 °F (0.0 °C) in 1990. The low temperature is usually* between 13.0 °F (-10.6 °C) and 36.1 °F (2.3 °C). About a quarter of the time, the low temperature is less than 13.0 °F (-10.6 °C), and another quarter of the time, the low temperature is greater than and 36.1 °F (2.3 °C). About 95% of the time, the low temperature has been between -9.1 °F (-22.8 °C) and 58.2 °F (14.5 °C).
Frost
On December 21 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 66.8% 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