- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On June 18 in this location the average high temperature is 78.4 °F (25.8 °C). The lowest recored high temperature was 54.0 °F (12.2 °C) in 1950 and the highest recored high temperature was 97.0 °F (36.1 °C) in 1990. The high temperature is usually* between 72.3 °F (22.4 °C) and 84.5 °F (29.2 °C). About a quarter of the time, the high temperature is less than 72.3 °F (22.4 °C), and another quarter of the time, the high temperature is greater than and 84.5 °F (29.2 °C). About 95% of the time, the high temperature has been between 60.8 °F (16.0 °C) and 96.0 °F (35.6 °C).
Low Temperatures
On June 18 in this location the average low temperature is 61.7 °F (16.5 °C). The lowest recored low temperature was 46.0 °F (7.8 °C) in 1958 and the lowest recored low temperature was 79.0 °F (26.1 °C) in 2024. The low temperature is usually* between 57.0 °F (13.9 °C) and 66.4 °F (19.1 °C). About a quarter of the time, the low temperature is less than 57.0 °F (13.9 °C), and another quarter of the time, the low temperature is greater than and 66.4 °F (19.1 °C). About 95% of the time, the low temperature has been between 48.0 °F (8.9 °C) and 75.4 °F (24.1 °C).
Frost
On June 18 in this location expect the temperatures to drop below freezing for a risk of frost about 0.0% 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:
- CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 to 2025
- NORTHERLY ISLAND — Integrated Surface Dataset (ISD) station ID: 998499 — from year 2013 to 2025
- FOSTER AVE CHICAGO — Integrated Surface Dataset (ISD) station ID: 998497 — from year 2015 to 2019
- CHICAGO/MEIGS — Integrated Surface Dataset (ISD) station ID: 725346 — from year 2000 to 2002
- CHICAGO/MEIGS — Integrated Surface Dataset (ISD) station ID: 725346 — Weather Bureau Army Navy (WBAN): 94866 — from year 1973 to 1999
- NAVAL AIR STATION — Integrated Surface Dataset (ISD) station ID: 725306 — Weather Bureau Army Navy (WBAN): 14855 — from year 1973 to 1994
- WILMETTE (MARINES)& — Integrated Surface Dataset (ISD) station ID: 725307 — from year 1976 to 1994
- WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 — from year 1987 to 1990
- NAVAL AIR STATION — Weather Bureau Army Navy (WBAN): 14855 — from year 1945 to 1972
- CHICAGO MEIGS FIELD — Weather Bureau Army Navy (WBAN): 94866 — from year 1966 to 1970