- Country: US
- State: IL
- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On April 18 in WILMETTE (CGS) the average high temperature is 51.5 °F (10.8 °C). The lowest recored high temperature was 38.8 °F (3.8 °C) in 1989 and the highest recored high temperature was 47.8 °F (8.8 °C) in 1988. The high temperature is usually* between 44.3 °F (6.9 °C) and 58.6 °F (14.8 °C). About a quarter of the time, the high temperature is less than 44.3 °F (6.9 °C), and another quarter of the time, the high temperature is greater than and 58.6 °F (14.8 °C). About 95% of the time, the high temperature has been between 30.8 °F (-0.7 °C) and 72.1 °F (22.3 °C).
Low Temperatures
On April 18 in WILMETTE (CGS) the average low temperature is 36.6 °F (2.6 °C). The lowest recored low temperature was 32.0 °F (0.0 °C) in 1990 and the lowest recored low temperature was 36.0 °F (2.2 °C) in 1989. The low temperature is usually* between 33.0 °F (0.6 °C) and 40.2 °F (4.6 °C). About a quarter of the time, the low temperature is less than 33.0 °F (0.6 °C), and another quarter of the time, the low temperature is greater than and 40.2 °F (4.6 °C). About 95% of the time, the low temperature has been between 26.1 °F (-3.3 °C) and 47.1 °F (8.4 °C).
Frost
On April 18 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 19.5% 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