- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On March 20 in WILMETTE (CGS) the average high temperature is 40.6 °F (4.8 °C). The lowest recored high temperature was 34.9 °F (1.6 °C) in 1989 and the highest recored high temperature was 43.9 °F (6.6 °C) in 1990. The high temperature is usually* between 32.9 °F (0.5 °C) and 48.3 °F (9.0 °C). About a quarter of the time, the high temperature is less than 32.9 °F (0.5 °C), and another quarter of the time, the high temperature is greater than and 48.3 °F (9.0 °C). About 95% of the time, the high temperature has been between 18.2 °F (-7.6 °C) and 62.9 °F (17.2 °C).
Low Temperatures
On March 20 in WILMETTE (CGS) the average low temperature is 25.6 °F (-3.6 °C). The lowest recored low temperature was 17.1 °F (-8.3 °C) in 1990 and the lowest recored low temperature was 32.0 °F (0.0 °C) in 1989. The low temperature is usually* between 20.2 °F (-6.6 °C) and 30.9 °F (-0.6 °C). About a quarter of the time, the low temperature is less than 20.2 °F (-6.6 °C), and another quarter of the time, the low temperature is greater than and 30.9 °F (-0.6 °C). About 95% of the time, the low temperature has been between 10.0 °F (-12.2 °C) and 41.1 °F (5.1 °C).
Frost
On March 20 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 79.2% 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 1989 to 1990