- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On December 31 in WILMETTE (CGS) the average high temperature is 29.5 °F (-1.4 °C). The lowest recored high temperature was 14.2 °F (-9.9 °C) in 1990 and the highest recored high temperature was 36.0 °F (2.2 °C) in 1987. The high temperature is usually* between 25.2 °F (-3.8 °C) and 33.8 °F (1.0 °C). About a quarter of the time, the high temperature is less than 25.2 °F (-3.8 °C), and another quarter of the time, the high temperature is greater than and 33.8 °F (1.0 °C). About 95% of the time, the high temperature has been between 17.1 °F (-8.3 °C) and 41.9 °F (5.5 °C).
Low Temperatures
On December 31 in WILMETTE (CGS) the average low temperature is 18.4 °F (-7.6 °C). The lowest recored low temperature was 2.1 °F (-16.6 °C) in 1990 and the lowest recored low temperature was 27.1 °F (-2.7 °C) in 1989. The low temperature is usually* between 11.7 °F (-11.3 °C) and 25.2 °F (-3.8 °C). About a quarter of the time, the low temperature is less than 11.7 °F (-11.3 °C), and another quarter of the time, the low temperature is greater than and 25.2 °F (-3.8 °C). About 95% of the time, the low temperature has been between -1.2 °F (-18.4 °C) and 38.0 °F (3.3 °C).
Frost
On December 31 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 91.3% 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