Station information
- Integrated Surface Dataset (ISD) station ID: 722417
- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On April 21 in WILMETTE (CGS) the average high temperature is 53.0 °F (11.7 °C). The lowest recored high temperature was 47.8 °F (8.8 °C) in 1988 and the highest recored high temperature was 61.9 °F (16.6 °C) in 1989. The high temperature is usually* between 48.5 °F (9.2 °C) and 57.5 °F (14.2 °C). About a quarter of the time, the high temperature is less than 48.5 °F (9.2 °C), and another quarter of the time, the high temperature is greater than and 57.5 °F (14.2 °C). About 95% of the time, the high temperature has been between 40.0 °F (4.4 °C) and 66.0 °F (18.9 °C).
Low Temperatures
On April 21 in WILMETTE (CGS) the average low temperature is 41.9 °F (5.5 °C). The lowest recored low temperature was 34.0 °F (1.1 °C) in 1988 and the lowest recored low temperature was 43.0 °F (6.1 °C) in 1990. The low temperature is usually* between 38.5 °F (3.6 °C) and 45.3 °F (7.4 °C). About a quarter of the time, the low temperature is less than 38.5 °F (3.6 °C), and another quarter of the time, the low temperature is greater than and 45.3 °F (7.4 °C). About 95% of the time, the low temperature has been between 31.9 °F (-0.1 °C) and 51.9 °F (11.1 °C).
Frost
On April 21 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 2.6% 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 1988 to 1990