- Latitude: 42.117
- Longitude: -87.9
High Temperatures
On July 20 in this location the average high temperature is 84.5 °F (29.2 °C). The lowest recored high temperature was 62.1 °F (16.7 °C) in 1950 and the highest recored high temperature was 100.9 °F (38.3 °C) in 1980. The high temperature is usually* between 80.1 °F (26.7 °C) and 89.0 °F (31.7 °C). About a quarter of the time, the high temperature is less than 80.1 °F (26.7 °C), and another quarter of the time, the high temperature is greater than and 89.0 °F (31.7 °C). About 95% of the time, the high temperature has been between 71.6 °F (22.0 °C) and 97.4 °F (36.4 °C).
Low Temperatures
On July 20 in this location the average low temperature is 65.8 °F (18.8 °C). The lowest recored low temperature was 45.0 °F (7.2 °C) in 2003 and the lowest recored low temperature was 79.7 °F (26.5 °C) in 2022. The low temperature is usually* between 61.9 °F (16.6 °C) and 69.8 °F (21.0 °C). About a quarter of the time, the low temperature is less than 61.9 °F (16.6 °C), and another quarter of the time, the low temperature is greater than and 69.8 °F (21.0 °C). About 95% of the time, the low temperature has been between 54.4 °F (12.4 °C) and 77.3 °F (25.1 °C).
Frost
On July 20 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 O'HARE INTERNATIONAL — Integrated Surface Dataset (ISD) station ID: 725300 — Weather Bureau Army Navy (WBAN): 94846 — from year 1947 to 2025
- PALWAUKEE MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 744665 — Weather Bureau Army Navy (WBAN): 04838 — from year 2006 to 2025
- WAUKEGAN HARBOR — Integrated Surface Dataset (ISD) station ID: 997735 — from year 2007 to 2025
- FOSTER AVE CHICAGO — Integrated Surface Dataset (ISD) station ID: 998497 — from year 2012 to 2019
- PALWAUKEE MUNI — Integrated Surface Dataset (ISD) station ID: 744665 — from year 2002 to 2005
- ANN ARBOR MUNICIPAL — Integrated Surface Dataset (ISD) station ID: 725374 — from year 1999 to 2005
- WILMETTE (MARINES)& — Integrated Surface Dataset (ISD) station ID: 725307 — from year 1976 to 1995
- NAVAL AIR STATION — Integrated Surface Dataset (ISD) station ID: 725306 — Weather Bureau Army Navy (WBAN): 14855 — from year 1973 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 OHARE INTL AP — Weather Bureau Army Navy (WBAN): 94846 — from year 1970 to 1972
- PARK RIDGE AF — Weather Bureau Army Navy (WBAN): 14810 — from year 1949 to 1958