# Annual precipitation in Umatilla County

Annual precipitation in Umatilla County was 18.45 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-41059`
- 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/umatilla-county-oregon
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-41059

| Period | inches |
|---|---:|
| 2025 | 18.45 |
| 2024 | 21.6 |
| 2023 | 18.34 |
| 2022 | 24.93 |
| 2021 | 16.93 |
| 2020 | 23.15 |
| 2019 | 20.89 |
| 2018 | 19.62 |
| 2017 | 22.9 |
| 2016 | 20.89 |
| 2015 | 17.19 |
| 2014 | 22.29 |
| 2013 | 18.94 |
| 2012 | 24.51 |
| 2011 | 20.39 |
| 2010 | 25.19 |
| 2009 | 20.08 |
| 2008 | 19.01 |
| 2007 | 17.71 |
| 2006 | 22.68 |
| 2005 | 16.96 |
| 2004 | 21.71 |
| 2003 | 20.61 |
| 2002 | 15.01 |
| 2001 | 16.25 |
| 2000 | 21.96 |
| 1999 | 16.31 |
| 1998 | 22.11 |
| 1997 | 20.12 |
| 1996 | 27.03 |
| 1995 | 26.7 |
| 1994 | 20.54 |
| 1993 | 21.01 |
| 1992 | 17.71 |
| 1991 | 22.46 |
| 1990 | 19.25 |
| 1989 | 20.12 |
| 1988 | 19.14 |
| 1987 | 14.28 |
| 1986 | 21.55 |
| 1985 | 16.34 |
| 1984 | 25.8 |
| 1983 | 26.43 |
| 1982 | 25.43 |
| 1981 | 24.52 |
| 1980 | 22.87 |
| 1979 | 21.22 |
| 1978 | 22.67 |
| 1977 | 18.9 |
| 1976 | 15.91 |
| 1975 | 22.55 |
| 1974 | 17.07 |
| 1973 | 22.19 |
| 1972 | 18.98 |
| 1971 | 23.58 |
| 1970 | 23.6 |
| 1969 | 19.77 |
| 1968 | 20.06 |
| 1967 | 15.08 |
| 1966 | 18.57 |
| 1965 | 18.78 |
| 1964 | 20.67 |
| 1963 | 18.5 |
| 1962 | 20.84 |
| 1961 | 19.79 |
| 1960 | 20.29 |
| 1959 | 18.87 |
| 1958 | 23.49 |
| 1957 | 23.32 |
| 1956 | 20.6 |
| 1955 | 21.13 |
| 1954 | 16.57 |
| 1953 | 24.08 |
| 1952 | 15.55 |
| 1951 | 18.86 |
| 1950 | 23.84 |