# Annual precipitation in Mercer County

Annual precipitation in Mercer County was 31.69 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-39107`
- 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/mercer-county-ohio
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-39107

| Period | inches |
|---|---:|
| 2025 | 31.69 |
| 2024 | 38.32 |
| 2023 | 32.85 |
| 2022 | 32.7 |
| 2021 | 41.26 |
| 2020 | 41.41 |
| 2019 | 44.47 |
| 2018 | 43.86 |
| 2017 | 45.7 |
| 2016 | 33.02 |
| 2015 | 46.81 |
| 2014 | 39.05 |
| 2013 | 38.67 |
| 2012 | 35.06 |
| 2011 | 52.21 |
| 2010 | 34.85 |
| 2009 | 32.03 |
| 2008 | 42.29 |
| 2007 | 41.39 |
| 2006 | 42.24 |
| 2005 | 39.54 |
| 2004 | 36.34 |
| 2003 | 53.2 |
| 2002 | 33.28 |
| 2001 | 38.84 |
| 2000 | 36.81 |
| 1999 | 29.62 |
| 1998 | 38.95 |
| 1997 | 36.05 |
| 1996 | 41.36 |
| 1995 | 36.87 |
| 1994 | 29.84 |
| 1993 | 40.37 |
| 1992 | 44.15 |
| 1991 | 32.08 |
| 1990 | 50.91 |
| 1989 | 41 |
| 1988 | 28.41 |
| 1987 | 32.25 |
| 1986 | 40.82 |
| 1985 | 36.41 |
| 1984 | 35.27 |
| 1983 | 34.43 |
| 1982 | 38.04 |
| 1981 | 37.55 |
| 1980 | 33.24 |
| 1979 | 38.3 |
| 1978 | 32.11 |
| 1977 | 36.04 |
| 1976 | 29 |
| 1975 | 38.77 |
| 1974 | 34.21 |
| 1973 | 40.22 |
| 1972 | 44.14 |
| 1971 | 36.14 |
| 1970 | 29.84 |
| 1969 | 36.31 |
| 1968 | 36 |
| 1967 | 37.25 |
| 1966 | 32.39 |
| 1965 | 33.86 |
| 1964 | 32.5 |
| 1963 | 23.91 |
| 1962 | 29.8 |
| 1961 | 37.22 |
| 1960 | 27.24 |
| 1959 | 37.87 |
| 1958 | 39.63 |
| 1957 | 45.44 |
| 1956 | 33.58 |
| 1955 | 35.55 |
| 1954 | 36.84 |
| 1953 | 28.84 |
| 1952 | 39.79 |
| 1951 | 37.86 |
| 1950 | 51.57 |