# Annual precipitation in Cook County

Annual precipitation in Cook County was 30.21 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-17031`
- Unit: inches
- Definition: Total precipitation from January to December, in inches: rain plus the water content of snow and other frozen precipitation. 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, not the reading at one weather station. NOAA revises the last two years every month.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December precipitation, 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 precipitation, 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/annual-precipitation/cook-county-illinois
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-17031

| Period | inches |
|---|---:|
| 2025 | 30.21 |
| 2024 | 38.09 |
| 2023 | 36.36 |
| 2022 | 32.99 |
| 2021 | 30.23 |
| 2020 | 38.94 |
| 2019 | 49.17 |
| 2018 | 43.85 |
| 2017 | 43.73 |
| 2016 | 37.21 |
| 2015 | 41.23 |
| 2014 | 41.76 |
| 2013 | 38.82 |
| 2012 | 28.08 |
| 2011 | 45.13 |
| 2010 | 38.71 |
| 2009 | 43.96 |
| 2008 | 47.39 |
| 2007 | 38.46 |
| 2006 | 43.26 |
| 2005 | 25.21 |
| 2004 | 35.21 |
| 2003 | 34.74 |
| 2002 | 32.19 |
| 2001 | 38.81 |
| 2000 | 37.77 |
| 1999 | 36.41 |
| 1998 | 39.85 |
| 1997 | 33.86 |
| 1996 | 37.06 |
| 1995 | 34.93 |
| 1994 | 32.3 |
| 1993 | 45.16 |
| 1992 | 30.67 |
| 1991 | 36.56 |
| 1990 | 46.01 |
| 1989 | 29.78 |
| 1988 | 30.54 |
| 1987 | 38.69 |
| 1986 | 34.66 |
| 1985 | 39.31 |
| 1984 | 34.65 |
| 1983 | 44.2 |
| 1982 | 42.03 |
| 1981 | 36.47 |
| 1980 | 35.75 |
| 1979 | 37.85 |
| 1978 | 35.94 |
| 1977 | 36.02 |
| 1976 | 30.67 |
| 1975 | 39.88 |
| 1974 | 37.31 |
| 1973 | 38.86 |
| 1972 | 44.43 |
| 1971 | 28.55 |
| 1970 | 42.35 |
| 1969 | 34.87 |
| 1968 | 32.31 |
| 1967 | 36.94 |
| 1966 | 33.92 |
| 1965 | 40.31 |
| 1964 | 30.03 |
| 1963 | 26.22 |
| 1962 | 23.81 |
| 1961 | 38.26 |
| 1960 | 29.38 |
| 1959 | 36.64 |
| 1958 | 26.85 |
| 1957 | 41.13 |
| 1956 | 22.76 |
| 1955 | 30.91 |
| 1954 | 44.26 |
| 1953 | 27.68 |
| 1952 | 29.02 |
| 1951 | 40.13 |
| 1950 | 36.52 |