- Latitude: 41.786
- Longitude: -87.752
High Temperatures
On September 18 in this location the average high temperature is 76.3 °F (24.6 °C). The lowest recored high temperature was 60.1 °F (15.6 °C) in 1981 and the highest recored high temperature was 93.9 °F (34.4 °C) in 1955. The high temperature is usually* between 71.1 °F (21.7 °C) and 81.5 °F (27.5 °C). About a quarter of the time, the high temperature is less than 71.1 °F (21.7 °C), and another quarter of the time, the high temperature is greater than and 81.5 °F (27.5 °C). About 95% of the time, the high temperature has been between 61.2 °F (16.2 °C) and 91.4 °F (33.0 °C).
Low Temperatures
On September 18 in this location the average low temperature is 58.1 °F (14.5 °C). The lowest recored low temperature was 37.0 °F (2.8 °C) in 1984 and the lowest recored low temperature was 75.9 °F (24.4 °C) in 1988. The low temperature is usually* between 53.6 °F (12.0 °C) and 62.7 °F (17.0 °C). About a quarter of the time, the low temperature is less than 53.6 °F (12.0 °C), and another quarter of the time, the low temperature is greater than and 62.7 °F (17.0 °C). About 95% of the time, the low temperature has been between 45.0 °F (7.2 °C) and 71.3 °F (21.8 °C).
Frost
On September 18 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 2024
- CHICAGO MIDWAY INTL ARPT — Integrated Surface Dataset (ISD) station ID: 725340 — Weather Bureau Army Navy (WBAN): 14819 — from year 1973 to 2024
- 9087044 - CALUMET IL — Integrated Surface Dataset (ISD) station ID: 997255 — from year 2005 to 2024
- NORTHERLY ISLAND — Integrated Surface Dataset (ISD) station ID: 998499 — from year 2012 to 2024
- FOSTER AVE CHICAGO — Integrated Surface Dataset (ISD) station ID: 998497 — from year 2012 to 2017
- 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 1995 to 1995
- CALUMET (CGS) — Integrated Surface Dataset (ISD) station ID: 722418 — from year 1987 to 1988
- 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