- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On July 30 in this location the average high temperature is 81.7 °F (27.6 °C). The lowest recored high temperature was 65.8 °F (18.8 °C) in 1992 and the highest recored high temperature was 102.2 °F (39.0 °C) in 1999. The high temperature is usually* between 77.2 °F (25.1 °C) and 86.2 °F (30.1 °C). About a quarter of the time, the high temperature is less than 77.2 °F (25.1 °C), and another quarter of the time, the high temperature is greater than and 86.2 °F (30.1 °C). About 95% of the time, the high temperature has been between 68.7 °F (20.4 °C) and 94.8 °F (34.9 °C).
Low Temperatures
On July 30 in this location the average low temperature is 67.9 °F (19.9 °C). The lowest recored low temperature was 55.0 °F (12.8 °C) in 1984 and the lowest recored low temperature was 86.0 °F (30.0 °C) in 1999. The low temperature is usually* between 64.2 °F (17.9 °C) and 71.6 °F (22.0 °C). About a quarter of the time, the low temperature is less than 64.2 °F (17.9 °C), and another quarter of the time, the low temperature is greater than and 71.6 °F (22.0 °C). About 95% of the time, the low temperature has been between 57.2 °F (14.0 °C) and 78.5 °F (25.9 °C).
Frost
On July 30 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 — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 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
- 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
- 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 MEIGS FIELD — Weather Bureau Army Navy (WBAN): 94866 — from year 1966 to 1969