Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On March 21 in WILMETTE (CGS) the average high temperature is 44.8 °F (7.1 °C). The lowest recored high temperature was 31.1 °F (-0.5 °C) in 1989 and the highest recored high temperature was 61.9 °F (16.6 °C) in 1990. The high temperature is usually* between 35.6 °F (2.0 °C) and 54.0 °F (12.2 °C). About a quarter of the time, the high temperature is less than 35.6 °F (2.0 °C), and another quarter of the time, the high temperature is greater than and 54.0 °F (12.2 °C). About 95% of the time, the high temperature has been between 18.2 °F (-7.6 °C) and 71.4 °F (21.9 °C).
Low Temperatures
On March 21 in WILMETTE (CGS) the average low temperature is 29.5 °F (-1.4 °C). The lowest recored low temperature was 26.1 °F (-3.3 °C) in 1989 and the lowest recored low temperature was 36.9 °F (2.7 °C) in 1990. The low temperature is usually* between 23.3 °F (-4.8 °C) and 35.7 °F (2.1 °C). About a quarter of the time, the low temperature is less than 23.3 °F (-4.8 °C), and another quarter of the time, the low temperature is greater than and 35.7 °F (2.1 °C). About 95% of the time, the low temperature has been between 11.6 °F (-11.3 °C) and 47.5 °F (8.6 °C).
Frost
On March 21 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 60.6% 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