- Latitude: 42.067
- Longitude: -87.683
High Temperatures
On July 31 in this location the average high temperature is 82.8 °F (28.2 °C). The lowest recored high temperature was 66.4 °F (19.1 °C) in 1947 and the highest recored high temperature was 99.0 °F (37.2 °C) in 2006. The high temperature is usually* between 78.6 °F (25.9 °C) and 87.0 °F (30.5 °C). About a quarter of the time, the high temperature is less than 78.6 °F (25.9 °C), and another quarter of the time, the high temperature is greater than and 87.0 °F (30.5 °C). About 95% of the time, the high temperature has been between 70.7 °F (21.5 °C) and 94.9 °F (35.0 °C).
Low Temperatures
On July 31 in this location the average low temperature is 65.9 °F (18.8 °C). The lowest recored low temperature was 50.0 °F (10.0 °C) in 2003 and the lowest recored low temperature was 80.1 °F (26.7 °C) in 1980. The low temperature is usually* between 62.2 °F (16.8 °C) and 69.5 °F (20.9 °C). About a quarter of the time, the low temperature is less than 62.2 °F (16.8 °C), and another quarter of the time, the low temperature is greater than and 69.5 °F (20.9 °C). About 95% of the time, the low temperature has been between 55.2 °F (12.9 °C) and 76.5 °F (24.7 °C).
Frost
On July 31 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
- CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 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
- NORTHERLY ISLAND — Integrated Surface Dataset (ISD) station ID: 998499 — from year 2012 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 1995 to 2005
- ANN ARBOR MUNICIPAL — Integrated Surface Dataset (ISD) station ID: 725374 — from year 1999 to 2005
- 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 OHARE INTL AP — Weather Bureau Army Navy (WBAN): 94846 — from year 1970 to 1972
- CHICAGO MEIGS FIELD — Weather Bureau Army Navy (WBAN): 94866 — from year 1966 to 1969
- PARK RIDGE AF — Weather Bureau Army Navy (WBAN): 14810 — from year 1949 to 1958