- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On May 31 in WILMETTE (CGS) the average high temperature is 75.4 °F (24.1 °C). The lowest recored high temperature was 54.9 °F (12.7 °C) in 1990 and the highest recored high temperature was 84.9 °F (29.4 °C) in 1988. The high temperature is usually* between 65.7 °F (18.7 °C) and 85.1 °F (29.5 °C). About a quarter of the time, the high temperature is less than 65.7 °F (18.7 °C), and another quarter of the time, the high temperature is greater than and 85.1 °F (29.5 °C). About 95% of the time, the high temperature has been between 47.2 °F (8.5 °C) and 103.6 °F (39.8 °C).
Low Temperatures
On May 31 in WILMETTE (CGS) the average low temperature is 56.6 °F (13.7 °C). The lowest recored low temperature was 41.9 °F (5.5 °C) in 1990 and the lowest recored low temperature was 67.8 °F (19.9 °C) in 1988. The low temperature is usually* between 50.6 °F (10.3 °C) and 62.7 °F (17.1 °C). About a quarter of the time, the low temperature is less than 50.6 °F (10.3 °C), and another quarter of the time, the low temperature is greater than and 62.7 °F (17.1 °C). About 95% of the time, the low temperature has been between 39.0 °F (3.9 °C) and 74.2 °F (23.5 °C).
Frost
On May 31 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 0.3% 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 1988 to 1990