- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On December 30 in WILMETTE (CGS) the average high temperature is 31.3 °F (-0.4 °C). The lowest recored high temperature was 31.1 °F (-0.5 °C) in 1987 and the highest recored high temperature was 32.9 °F (0.5 °C) in 1988. The high temperature is usually* between 26.4 °F (-3.1 °C) and 36.2 °F (2.3 °C). About a quarter of the time, the high temperature is less than 26.4 °F (-3.1 °C), and another quarter of the time, the high temperature is greater than and 36.2 °F (2.3 °C). About 95% of the time, the high temperature has been between 17.1 °F (-8.3 °C) and 45.5 °F (7.5 °C).
Low Temperatures
On December 30 in WILMETTE (CGS) the average low temperature is 21.3 °F (-5.9 °C). The lowest recored low temperature was 10.0 °F (-12.2 °C) in 1990 and the lowest recored low temperature was 30.0 °F (-1.1 °C) in 1989. The low temperature is usually* between 14.6 °F (-9.7 °C) and 28.0 °F (-2.2 °C). About a quarter of the time, the low temperature is less than 14.6 °F (-9.7 °C), and another quarter of the time, the low temperature is greater than and 28.0 °F (-2.2 °C). About 95% of the time, the low temperature has been between 1.7 °F (-16.8 °C) and 40.9 °F (4.9 °C).
Frost
On December 30 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 85.8% 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