- Latitude: 41.976
- Longitude: -87.648
High Temperatures
On May 18 in this location the average high temperature is 70.9 °F (21.6 °C). The lowest recored high temperature was 45.0 °F (7.2 °C) in 1969 and the highest recored high temperature was 93.0 °F (33.9 °C) in 1962. The high temperature is usually* between 63.7 °F (17.6 °C) and 78.1 °F (25.6 °C). About a quarter of the time, the high temperature is less than 63.7 °F (17.6 °C), and another quarter of the time, the high temperature is greater than and 78.1 °F (25.6 °C). About 95% of the time, the high temperature has been between 49.9 °F (9.9 °C) and 91.9 °F (33.3 °C).
Low Temperatures
On May 18 in this location the average low temperature is 50.9 °F (10.5 °C). The lowest recored low temperature was 34.0 °F (1.1 °C) in 2002 and the lowest recored low temperature was 74.8 °F (23.8 °C) in 1996. The low temperature is usually* between 45.7 °F (7.6 °C) and 56.2 °F (13.4 °C). About a quarter of the time, the low temperature is less than 45.7 °F (7.6 °C), and another quarter of the time, the low temperature is greater than and 56.2 °F (13.4 °C). About 95% of the time, the low temperature has been between 35.7 °F (2.0 °C) and 66.2 °F (19.0 °C).
Frost
On May 18 in this location expect the temperatures to drop below freezing for a risk of frost about 0.8% 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
- 9087044 - CALUMET IL — Integrated Surface Dataset (ISD) station ID: 997255 — from year 2005 to 2025
- CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 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 2013 to 2025
- FOSTER AVE CHICAGO — Integrated Surface Dataset (ISD) station ID: 998497 — from year 2015 to 2019
- PALWAUKEE MUNI — Integrated Surface Dataset (ISD) station ID: 744665 — from year 1996 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
- CHICAGO / CALUMET COAST GUARD — Integrated Surface Dataset (ISD) station ID: 725344 — from year 1994 to 1996
- 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 1988 to 1990
- CALUMET (CGS) — Integrated Surface Dataset (ISD) station ID: 722418 — from year 1988 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 1970
- PARK RIDGE AF — Weather Bureau Army Navy (WBAN): 14810 — from year 1949 to 1958
- DUNNE CRIB IL. — Integrated Surface Dataset (ISD) station ID: 744650 — from year 1944 to 1944