- Latitude: 41.73
- Longitude: -87.54
High Temperatures
On July 21 in this location the average high temperature is 83.9 °F (28.9 °C). The lowest recored high temperature was 64.4 °F (18.0 °C) in 1996 and the highest recored high temperature was 102.2 °F (39.0 °C) in 2011. The high temperature is usually* between 79.3 °F (26.3 °C) and 88.6 °F (31.4 °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 88.6 °F (31.4 °C). About 95% of the time, the high temperature has been between 70.4 °F (21.3 °C) and 97.5 °F (36.4 °C).
Low Temperatures
On July 21 in this location the average low temperature is 68.6 °F (20.3 °C). The lowest recored low temperature was 51.1 °F (10.6 °C) in 1970 and the lowest recored low temperature was 86.2 °F (30.1 °C) in 2022. The low temperature is usually* between 65.1 °F (18.4 °C) and 72.1 °F (22.3 °C). About a quarter of the time, the low temperature is less than 65.1 °F (18.4 °C), and another quarter of the time, the low temperature is greater than and 72.1 °F (22.3 °C). About 95% of the time, the low temperature has been between 58.5 °F (14.7 °C) and 78.7 °F (25.9 °C).
Frost
On July 21 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 2017
- 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 1995
- 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