# Annual precipitation in Mason County

Annual precipitation in Mason County was 26.96 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-17125`
- 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/mason-county-illinois
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-17125

| Period | inches |
|---|---:|
| 2025 | 26.96 |
| 2024 | 38.46 |
| 2023 | 30.37 |
| 2022 | 34.45 |
| 2021 | 43.83 |
| 2020 | 33.32 |
| 2019 | 43.77 |
| 2018 | 42.12 |
| 2017 | 33.53 |
| 2016 | 35.63 |
| 2015 | 47.3 |
| 2014 | 42.46 |
| 2013 | 42.84 |
| 2012 | 25.38 |
| 2011 | 38.5 |
| 2010 | 47.91 |
| 2009 | 57.38 |
| 2008 | 48.64 |
| 2007 | 32.46 |
| 2006 | 33.22 |
| 2005 | 24.53 |
| 2004 | 36.48 |
| 2003 | 37.04 |
| 2002 | 37.83 |
| 2001 | 37.54 |
| 2000 | 33.51 |
| 1999 | 35.08 |
| 1998 | 45.34 |
| 1997 | 32.13 |
| 1996 | 30.06 |
| 1995 | 39.27 |
| 1994 | 31.61 |
| 1993 | 57.07 |
| 1992 | 36.65 |
| 1991 | 39.34 |
| 1990 | 51.63 |
| 1989 | 26.21 |
| 1988 | 22.61 |
| 1987 | 26.55 |
| 1986 | 38.37 |
| 1985 | 43.13 |
| 1984 | 40.59 |
| 1983 | 36.11 |
| 1982 | 43.73 |
| 1981 | 43.66 |
| 1980 | 34.64 |
| 1979 | 30.29 |
| 1978 | 32.27 |
| 1977 | 41.91 |
| 1976 | 27.23 |
| 1975 | 38.76 |
| 1974 | 39.26 |
| 1973 | 51.47 |
| 1972 | 36.22 |
| 1971 | 28.42 |
| 1970 | 44.37 |
| 1969 | 38.69 |
| 1968 | 29.95 |
| 1967 | 41.9 |
| 1966 | 35.24 |
| 1965 | 41.09 |
| 1964 | 32 |
| 1963 | 27.43 |
| 1962 | 30.54 |
| 1961 | 45.39 |
| 1960 | 38.93 |
| 1959 | 29.45 |
| 1958 | 29.87 |
| 1957 | 38.61 |
| 1956 | 27.36 |
| 1955 | 33.08 |
| 1954 | 34.18 |
| 1953 | 27.16 |
| 1952 | 30.38 |
| 1951 | 36.11 |
| 1950 | 29.6 |