# Annual precipitation in Louisa County

Annual precipitation in Louisa County was 33.82 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-19115`
- 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/louisa-county-iowa
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-19115

| Period | inches |
|---|---:|
| 2025 | 33.82 |
| 2024 | 37.36 |
| 2023 | 27.52 |
| 2022 | 25.86 |
| 2021 | 37.28 |
| 2020 | 35.23 |
| 2019 | 45.68 |
| 2018 | 42.75 |
| 2017 | 32.73 |
| 2016 | 36.93 |
| 2015 | 40.33 |
| 2014 | 37.61 |
| 2013 | 34.46 |
| 2012 | 29.02 |
| 2011 | 33.89 |
| 2010 | 49.87 |
| 2009 | 53.84 |
| 2008 | 48.86 |
| 2007 | 43.44 |
| 2006 | 32.01 |
| 2005 | 22.93 |
| 2004 | 35.7 |
| 2003 | 30.53 |
| 2002 | 32.98 |
| 2001 | 43.58 |
| 2000 | 36.28 |
| 1999 | 31.44 |
| 1998 | 44.79 |
| 1997 | 32.61 |
| 1996 | 32.3 |
| 1995 | 36.75 |
| 1994 | 26.4 |
| 1993 | 54.55 |
| 1992 | 39.41 |
| 1991 | 31.49 |
| 1990 | 43.98 |
| 1989 | 28.67 |
| 1988 | 20.98 |
| 1987 | 27.59 |
| 1986 | 39.54 |
| 1985 | 34.94 |
| 1984 | 38.16 |
| 1983 | 33.21 |
| 1982 | 45.94 |
| 1981 | 36.92 |
| 1980 | 37.14 |
| 1979 | 30.78 |
| 1978 | 34.42 |
| 1977 | 39.64 |
| 1976 | 29.28 |
| 1975 | 31.8 |
| 1974 | 39.24 |
| 1973 | 51.69 |
| 1972 | 36.7 |
| 1971 | 29.96 |
| 1970 | 41.41 |
| 1969 | 38.59 |
| 1968 | 31.14 |
| 1967 | 38.21 |
| 1966 | 31.99 |
| 1965 | 49.4 |
| 1964 | 29.15 |
| 1963 | 26.38 |
| 1962 | 31 |
| 1961 | 40.21 |
| 1960 | 36.2 |
| 1959 | 42.65 |
| 1958 | 34.98 |
| 1957 | 32.87 |
| 1956 | 20.39 |
| 1955 | 28.08 |
| 1954 | 36.45 |
| 1953 | 23.88 |
| 1952 | 30.45 |
| 1951 | 44.13 |
| 1950 | 30.04 |