# Average annual temperature in Cook County

Average annual temperature in Cook County was 51.2 °F in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `average_temperature_annual`
- Place id: `us-county-17031`
- Unit: °F
- Definition: Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.
- Note: Values are area averages, so a county with mountains and valleys has one value for very different local climates. NOAA revises the last two years every month.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December average temperature, counties (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping)
- Publisher page: https://invokely.ai/en/publishers/noaa-ncei
- Retrieved: 2026-10-12
- License: Public domain (US government work); NCEI asks users to cite the nClimDiv dataset
- Citation: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/average-annual-temperature/cook-county-illinois
- API: https://invokely.ai/api/v1/series?indicator=average_temperature_annual&place=us-county-17031

| Period | °F |
|---|---:|
| 2025 | 51.2 |
| 2024 | 54 |
| 2023 | 52.7 |
| 2022 | 50.3 |
| 2021 | 52.2 |
| 2020 | 51.6 |
| 2019 | 49.4 |
| 2018 | 50 |
| 2017 | 51.7 |
| 2016 | 52.2 |
| 2015 | 50.2 |
| 2014 | 47 |
| 2013 | 48.7 |
| 2012 | 53.7 |
| 2011 | 50.4 |
| 2010 | 51.1 |
| 2009 | 48.6 |
| 2008 | 48.5 |
| 2007 | 50.8 |
| 2006 | 51.6 |
| 2005 | 51.1 |
| 2004 | 49.9 |
| 2003 | 48.9 |
| 2002 | 50.8 |
| 2001 | 51 |
| 2000 | 50 |
| 1999 | 51.2 |
| 1998 | 53.2 |
| 1997 | 48.4 |
| 1996 | 47.4 |
| 1995 | 49.4 |
| 1994 | 49.4 |
| 1993 | 48.5 |
| 1992 | 48.8 |
| 1991 | 51.2 |
| 1990 | 51.2 |
| 1989 | 47.8 |
| 1988 | 49.8 |
| 1987 | 51.9 |
| 1986 | 50 |
| 1985 | 48.3 |
| 1984 | 49.2 |
| 1983 | 49.7 |
| 1982 | 48 |
| 1981 | 48.8 |
| 1980 | 48.2 |
| 1979 | 47 |
| 1978 | 47 |
| 1977 | 48.9 |
| 1976 | 47.6 |
| 1975 | 49.6 |
| 1974 | 48.7 |
| 1973 | 50.7 |
| 1972 | 46.7 |
| 1971 | 49.4 |
| 1970 | 48.6 |
| 1969 | 47.9 |
| 1968 | 49.3 |
| 1967 | 47.5 |
| 1966 | 48.3 |
| 1965 | 48.8 |
| 1964 | 49.9 |
| 1963 | 47.7 |
| 1962 | 48 |
| 1961 | 48.8 |
| 1960 | 48.1 |
| 1959 | 48.9 |
| 1958 | 47.5 |
| 1957 | 48.7 |
| 1956 | 49.8 |
| 1955 | 49.8 |
| 1954 | 50.5 |
| 1953 | 50.9 |
| 1952 | 49.7 |
| 1951 | 46.7 |
| 1950 | 46.8 |