# Annual precipitation in Illinois

Annual precipitation in Illinois was 32.96 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-state-17`
- 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, contiguous US and statewide (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/11/pcp/12/12/1895-2025/data.json)
- 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, contiguous US and statewide. 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/statewide/time-series/11/pcp/12/12/1895-2025/data.json. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/annual-precipitation/illinois
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-state-17

| Period | inches |
|---|---:|
| 2025 | 32.96 |
| 2024 | 40.87 |
| 2023 | 34.65 |
| 2022 | 37.25 |
| 2021 | 41.01 |
| 2020 | 41.93 |
| 2019 | 49.86 |
| 2018 | 45.79 |
| 2017 | 37.8 |
| 2016 | 39.74 |
| 2015 | 48.8 |
| 2014 | 41.29 |
| 2013 | 42.49 |
| 2012 | 30.11 |
| 2011 | 46.1 |
| 2010 | 40.68 |
| 2009 | 50.96 |
| 2008 | 50.17 |
| 2007 | 36.68 |
| 2006 | 40.63 |
| 2005 | 31.43 |
| 2004 | 39.97 |
| 2003 | 37.77 |
| 2002 | 39.06 |
| 2001 | 39.65 |
| 2000 | 39.77 |
| 1999 | 35.71 |
| 1998 | 44.48 |
| 1997 | 35.1 |
| 1996 | 38.82 |
| 1995 | 38.91 |
| 1994 | 35.49 |
| 1993 | 51.17 |
| 1992 | 35.81 |
| 1991 | 36.12 |
| 1990 | 49.94 |
| 1989 | 32.39 |
| 1988 | 29.33 |
| 1987 | 34.68 |
| 1986 | 37.45 |
| 1985 | 45.63 |
| 1984 | 41.31 |
| 1983 | 41.29 |
| 1982 | 46.58 |
| 1981 | 41.69 |
| 1980 | 33.65 |
| 1979 | 38.63 |
| 1978 | 35.72 |
| 1977 | 41.8 |
| 1976 | 28.54 |
| 1975 | 40.74 |
| 1974 | 41.66 |
| 1973 | 47.61 |
| 1972 | 41.54 |
| 1971 | 32.2 |
| 1970 | 41.76 |
| 1969 | 40.71 |
| 1968 | 35.7 |
| 1967 | 40.55 |
| 1966 | 34.91 |
| 1965 | 41.81 |
| 1964 | 32.11 |
| 1963 | 27.82 |
| 1962 | 33.41 |
| 1961 | 43.01 |
| 1960 | 34.62 |
| 1959 | 37.81 |
| 1958 | 35.33 |
| 1957 | 45.29 |
| 1956 | 30.21 |
| 1955 | 34.36 |
| 1954 | 35.35 |
| 1953 | 27.43 |
| 1952 | 33.53 |
| 1951 | 43 |
| 1950 | 41.75 |
| 1949 | 40.8 |
| 1948 | 36.73 |
| 1947 | 37.26 |
| 1946 | 39.43 |
| 1945 | 45.89 |
| 1944 | 33.56 |
| 1943 | 34.68 |
| 1942 | 41.01 |
| 1941 | 39.79 |
| 1940 | 28.85 |
| 1939 | 35.78 |
| 1938 | 40.57 |
| 1937 | 36.59 |
| 1936 | 30 |
| 1935 | 41.29 |
| 1934 | 32.77 |
| 1933 | 34.66 |
| 1932 | 35.83 |
| 1931 | 37.39 |
| 1930 | 27.55 |
| 1929 | 41.71 |
| 1928 | 36.98 |
| 1927 | 49.21 |
| 1926 | 42.81 |
| 1925 | 32.1 |
| 1924 | 35.79 |
| 1923 | 37.66 |
| 1922 | 34 |
| 1921 | 40.74 |
| 1920 | 32.58 |
| 1919 | 37.23 |
| 1918 | 38.04 |
| 1917 | 31.95 |
| 1916 | 36.97 |
| 1915 | 41.8 |
| 1914 | 28.23 |
| 1913 | 35.22 |
| 1912 | 34.96 |
| 1911 | 38.64 |
| 1910 | 31.86 |
| 1909 | 43.17 |
| 1908 | 35.44 |
| 1907 | 40.76 |
| 1906 | 36.83 |
| 1905 | 37.04 |
| 1904 | 37.18 |
| 1903 | 34.64 |
| 1902 | 42.79 |
| 1901 | 25.52 |
| 1900 | 35.29 |
| 1899 | 32.56 |
| 1898 | 46.79 |
| 1897 | 35.71 |
| 1896 | 35.95 |
| 1895 | 31.15 |