- Latitude: 41.73
- Longitude: -87.54
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 69.1 °F (20.6 °C) in 1985 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 87.1 °F (30.6 °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 87.1 °F (30.6 °C). About 95% of the time, the high temperature has been between 70.5 °F (21.4 °C) and 95.1 °F (35.1 °C).
Low Temperatures
On July 31 in this location the average low temperature is 67.2 °F (19.6 °C). The lowest recored low temperature was 52.9 °F (11.6 °C) in 1978 and the lowest recored low temperature was 82.4 °F (28.0 °C) in 1999. The low temperature is usually* between 63.7 °F (17.6 °C) and 70.7 °F (21.5 °C). About a quarter of the time, the low temperature is less than 63.7 °F (17.6 °C), and another quarter of the time, the low temperature is greater than and 70.7 °F (21.5 °C). About 95% of the time, the low temperature has been between 57.0 °F (13.9 °C) and 77.4 °F (25.2 °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 MIDWAY INTL ARPT — Integrated Surface Dataset (ISD) station ID: 725340 — Weather Bureau Army Navy (WBAN): 14819 — from year 1973 to 2025
- 9087044 - CALUMET IL — Integrated Surface Dataset (ISD) station ID: 997255 — from year 2005 to 2025
- LANSING MUNICIPAL AP — Integrated Surface Dataset (ISD) station ID: 722126 — Weather Bureau Army Navy (WBAN): 04879 — from year 2006 to 2025
- GARY/CHICAGO AIRPORT — Integrated Surface Dataset (ISD) station ID: 725337 — Weather Bureau Army Navy (WBAN): 04807 — from year 2006 to 2025
- BURNS HARBOR — Integrated Surface Dataset (ISD) station ID: 997787 — 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
- GARY CHICAGO — Integrated Surface Dataset (ISD) station ID: 725337 — from year 1982 to 2005
- LANSING MUNI — Integrated Surface Dataset (ISD) station ID: 722126 — from year 2004 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
- CHICAGO / CALUMET COAST GUARD — Integrated Surface Dataset (ISD) station ID: 725344 — from year 1994 to 1994
- CALUMET (CGS) — Integrated Surface Dataset (ISD) station ID: 722418 — from year 1987 to 1989
- CHICAGO MIDWAY AP — Weather Bureau Army Navy (WBAN): 14819 — from year 1948 to 1972
- CHICAGO MEIGS FIELD — Weather Bureau Army Navy (WBAN): 94866 — from year 1966 to 1969