# Annual precipitation in Cass County

Annual precipitation in Cass County was 27.23 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-17017`
- 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/cass-county-illinois
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-17017

| Period | inches |
|---|---:|
| 2025 | 27.23 |
| 2024 | 39.05 |
| 2023 | 32.02 |
| 2022 | 38.01 |
| 2021 | 43.51 |
| 2020 | 35.83 |
| 2019 | 43.64 |
| 2018 | 43.04 |
| 2017 | 34.51 |
| 2016 | 31.67 |
| 2015 | 44.84 |
| 2014 | 40.85 |
| 2013 | 43.41 |
| 2012 | 27.46 |
| 2011 | 38.1 |
| 2010 | 49.08 |
| 2009 | 54.71 |
| 2008 | 51 |
| 2007 | 30.04 |
| 2006 | 32.7 |
| 2005 | 26.59 |
| 2004 | 36.09 |
| 2003 | 35.38 |
| 2002 | 39.11 |
| 2001 | 37.89 |
| 2000 | 34.29 |
| 1999 | 31.96 |
| 1998 | 46.19 |
| 1997 | 29.9 |
| 1996 | 30.54 |
| 1995 | 37.18 |
| 1994 | 34.52 |
| 1993 | 55.57 |
| 1992 | 34.08 |
| 1991 | 40.34 |
| 1990 | 49.96 |
| 1989 | 25.07 |
| 1988 | 25.1 |
| 1987 | 27.39 |
| 1986 | 40.29 |
| 1985 | 46.64 |
| 1984 | 42.22 |
| 1983 | 34.63 |
| 1982 | 48.79 |
| 1981 | 45.6 |
| 1980 | 35.9 |
| 1979 | 30.2 |
| 1978 | 32.46 |
| 1977 | 44.74 |
| 1976 | 26.64 |
| 1975 | 39.15 |
| 1974 | 40.21 |
| 1973 | 53.16 |
| 1972 | 34.89 |
| 1971 | 31.63 |
| 1970 | 49.45 |
| 1969 | 42.88 |
| 1968 | 33.31 |
| 1967 | 42.65 |
| 1966 | 35.83 |
| 1965 | 40.81 |
| 1964 | 32.32 |
| 1963 | 31.28 |
| 1962 | 34.55 |
| 1961 | 48.9 |
| 1960 | 39.08 |
| 1959 | 33.04 |
| 1958 | 34.75 |
| 1957 | 42.29 |
| 1956 | 28.65 |
| 1955 | 36.16 |
| 1954 | 33.45 |
| 1953 | 25.39 |
| 1952 | 31.2 |
| 1951 | 40.38 |
| 1950 | 31.23 |