- Latitude: 41.983
- Longitude: -87.9
High Temperatures
On July 31 in this location the average high temperature is 83.4 °F (28.6 °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 79.3 °F (26.3 °C) and 87.5 °F (30.9 °C). About a quarter of the time, the high temperature is less than 79.3 °F (26.3 °C), and another quarter of the time, the high temperature is greater than and 87.5 °F (30.9 °C). About 95% of the time, the high temperature has been between 71.5 °F (21.9 °C) and 95.4 °F (35.2 °C).
Low Temperatures
On July 31 in this location the average low temperature is 65.4 °F (18.6 °C). The lowest recored low temperature was 50.0 °F (10.0 °C) in 2003 and the lowest recored low temperature was 82.4 °F (28.0 °C) in 1999. The low temperature is usually* between 61.8 °F (16.6 °C) and 69.0 °F (20.6 °C). About a quarter of the time, the low temperature is less than 61.8 °F (16.6 °C), and another quarter of the time, the low temperature is greater than and 69.0 °F (20.6 °C). About 95% of the time, the low temperature has been between 54.9 °F (12.7 °C) and 75.9 °F (24.4 °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 MIDWAY INTL ARPT — Integrated Surface Dataset (ISD) station ID: 725340 — Weather Bureau Army Navy (WBAN): 14819 — from year 1973 to 2025
- DUPAGE AIRPORT — Integrated Surface Dataset (ISD) station ID: 725305 — Weather Bureau Army Navy (WBAN): 94892 — from year 2006 to 2025
- PALWAUKEE MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 744665 — Weather Bureau Army Navy (WBAN): 04838 — from year 2006 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
- DUPAGE — Integrated Surface Dataset (ISD) station ID: 725305 — from year 1973 to 2005
- 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 MIDWAY AP — Weather Bureau Army Navy (WBAN): 14819 — from year 1948 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