Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On December 18 in WILMETTE (CGS) the average high temperature is 29.6 °F (-1.3 °C). The lowest recored high temperature was 16.2 °F (-8.8 °C) in 1989 and the highest recored high temperature was 38.8 °F (3.8 °C) in 1990. The high temperature is usually* between 22.0 °F (-5.6 °C) and 37.2 °F (2.9 °C). About a quarter of the time, the high temperature is less than 22.0 °F (-5.6 °C), and another quarter of the time, the high temperature is greater than and 37.2 °F (2.9 °C). About 95% of the time, the high temperature has been between 7.5 °F (-13.6 °C) and 51.6 °F (10.9 °C).
Low Temperatures
On December 18 in WILMETTE (CGS) the average low temperature is 19.8 °F (-6.8 °C). The lowest recored low temperature was 5.2 °F (-14.9 °C) in 1989 and the lowest recored low temperature was 32.9 °F (0.5 °C) in 1990. The low temperature is usually* between 12.3 °F (-11.0 °C) and 27.3 °F (-2.6 °C). About a quarter of the time, the low temperature is less than 12.3 °F (-11.0 °C), and another quarter of the time, the low temperature is greater than and 27.3 °F (-2.6 °C). About 95% of the time, the low temperature has been between -2.0 °F (-18.9 °C) and 41.6 °F (5.3 °C).
Frost
On December 18 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 86.4% 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