# Annual precipitation in Williamson County

Annual precipitation in Williamson County was 33.14 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-48491`
- 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/williamson-county-texas
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-48491

| Period | inches |
|---|---:|
| 2025 | 33.14 |
| 2024 | 32.15 |
| 2023 | 26.36 |
| 2022 | 23.59 |
| 2021 | 35.12 |
| 2020 | 31.12 |
| 2019 | 31.97 |
| 2018 | 38.79 |
| 2017 | 36.02 |
| 2016 | 44.45 |
| 2015 | 50.65 |
| 2014 | 29.25 |
| 2013 | 37.12 |
| 2012 | 28.42 |
| 2011 | 17.93 |
| 2010 | 32.51 |
| 2009 | 39.18 |
| 2008 | 20.04 |
| 2007 | 49.95 |
| 2006 | 32.48 |
| 2005 | 27.66 |
| 2004 | 52.94 |
| 2003 | 24.39 |
| 2002 | 36.39 |
| 2001 | 44.22 |
| 2000 | 41.05 |
| 1999 | 24.4 |
| 1998 | 40.18 |
| 1997 | 44.44 |
| 1996 | 28.77 |
| 1995 | 30.15 |
| 1994 | 35.97 |
| 1993 | 33.3 |
| 1992 | 45.32 |
| 1991 | 48.43 |
| 1990 | 32.16 |
| 1989 | 27.2 |
| 1988 | 20 |
| 1987 | 36.6 |
| 1986 | 38.97 |
| 1985 | 35.13 |
| 1984 | 31.58 |
| 1983 | 32.77 |
| 1982 | 30.63 |
| 1981 | 39.92 |
| 1980 | 29.66 |
| 1979 | 39.82 |
| 1978 | 29.56 |
| 1977 | 23.2 |
| 1976 | 40.71 |
| 1975 | 36.05 |
| 1974 | 40.03 |
| 1973 | 41.73 |
| 1972 | 31.61 |
| 1971 | 29.29 |
| 1970 | 30.88 |
| 1969 | 36.29 |
| 1968 | 43.39 |
| 1967 | 30.52 |
| 1966 | 29.07 |
| 1965 | 44.83 |
| 1964 | 33.09 |
| 1963 | 18.17 |
| 1962 | 30.99 |
| 1961 | 36.53 |
| 1960 | 36.19 |
| 1959 | 37.97 |
| 1958 | 38.27 |
| 1957 | 48.81 |
| 1956 | 17.44 |
| 1955 | 28.59 |
| 1954 | 12.67 |
| 1953 | 30.67 |
| 1952 | 32.9 |
| 1951 | 21.95 |
| 1950 | 25.73 |