# Annual precipitation in Union County

Annual precipitation in Union County was 33.43 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-39159`
- 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/union-county-ohio
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-39159

| Period | inches |
|---|---:|
| 2025 | 33.43 |
| 2024 | 35.58 |
| 2023 | 36.85 |
| 2022 | 39.97 |
| 2021 | 39.55 |
| 2020 | 39.37 |
| 2019 | 43.23 |
| 2018 | 47.9 |
| 2017 | 43.39 |
| 2016 | 39.5 |
| 2015 | 40.01 |
| 2014 | 37.72 |
| 2013 | 39.99 |
| 2012 | 35.21 |
| 2011 | 54.15 |
| 2010 | 33.45 |
| 2009 | 33.26 |
| 2008 | 40.85 |
| 2007 | 41.23 |
| 2006 | 41.11 |
| 2005 | 44.1 |
| 2004 | 41.53 |
| 2003 | 45.81 |
| 2002 | 37.57 |
| 2001 | 38.93 |
| 2000 | 39.16 |
| 1999 | 30.74 |
| 1998 | 33.95 |
| 1997 | 34.15 |
| 1996 | 43.99 |
| 1995 | 41.63 |
| 1994 | 30 |
| 1993 | 43.2 |
| 1992 | 40.78 |
| 1991 | 25.41 |
| 1990 | 49.65 |
| 1989 | 38.29 |
| 1988 | 30.2 |
| 1987 | 28.03 |
| 1986 | 40.44 |
| 1985 | 38.23 |
| 1984 | 33.65 |
| 1983 | 36.04 |
| 1982 | 33.97 |
| 1981 | 36.52 |
| 1980 | 38.84 |
| 1979 | 45.3 |
| 1978 | 33.87 |
| 1977 | 34.87 |
| 1976 | 31.38 |
| 1975 | 37.57 |
| 1974 | 34.22 |
| 1973 | 43.69 |
| 1972 | 43.51 |
| 1971 | 31.97 |
| 1970 | 33.67 |
| 1969 | 37.98 |
| 1968 | 36.58 |
| 1967 | 35.85 |
| 1966 | 36.8 |
| 1965 | 33.23 |
| 1964 | 39.33 |
| 1963 | 24.65 |
| 1962 | 29.25 |
| 1961 | 38.54 |
| 1960 | 26.98 |
| 1959 | 38.58 |
| 1958 | 38.97 |
| 1957 | 42.56 |
| 1956 | 36.39 |
| 1955 | 32.76 |
| 1954 | 33.91 |
| 1953 | 26.54 |
| 1952 | 35.35 |
| 1951 | 36.75 |
| 1950 | 45.67 |