Annual precipitation in Williamson County

Annual precipitation in Williamson County was 50.57 inches in 2025, according to NOAA National Centers for Environmental Information. That is up 2.4% from 2024. That is the 67th highest of 95 counties in 2025.

2025, inches50.57

Change on 2024+2.4%

Rank67th of 95Counties in Tennessee ranked

Series high72.861979

Series low38.932007

Next release: Wednesday, 6 October 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Annual precipitation in Williamson County, 1950 to 2025

inches. Source: NOAA NCEI, NOAA Climate at a Glance, January to December precipitation, counties. Retrieved 2026-10-12, published 2026-10-06.

All 76 values

Period	inches
2025	50.57
2024	49.38
2023	41.26
2022	50.43
2021	58.33
2020	57.14
2019	62.31
2018	60.2
2017	57.28
2016	42.86
2015	54.98
2014	55.51
2013	56.74
2012	46.6
2011	54.53
2010	53.46
2009	59.3
2008	50.42
2007	38.93
2006	48.19
2005	43.33
2004	62.69
2003	60.62
2002	55.24
2001	52.8
2000	47.16
1999	43.09
1998	57.64
1997	55.89
1996	57.62
1995	55.44
1994	63.2
1993	46.37
1992	48.39
1991	57.73
1990	56.96
1989	65.65
1988	43.3
1987	39.98
1986	45.64
1985	39.5
1984	61.01
1983	59.23
1982	54.55
1981	45.63
1980	47.36
1979	72.86
1978	50.47
1977	56.19
1976	49.14
1975	62.25
1974	62.6
1973	66.74
1972	59.34
1971	45.46
1970	50.43
1969	49.5
1968	45.13
1967	46.8
1966	44.1
1965	44.78
1964	56.06
1963	43.02
1962	58.27
1961	50.11
1960	44.58
1959	52.07
1958	41.97
1957	62.78
1956	49.47
1955	50.45
1954	48.53
1953	45.87
1952	41.74
1951	60.54
1950	63.25

Compared with Tennessee and United States

Place	2025
Williamson County	50.57
Tennessee	53.42
United States	29.26

Williamson County compared with nearby places

Under 49
49 to 51
51 to 53
53 to 55
55 to 58
58 and over

Annual precipitation, 2025, inches. Williamson County is outlined. Same source and period for every area shown. Source: NOAA National Centers for Environmental Information. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

US states by annual precipitation 50 places
Counties in Tennessee by annual precipitation 95 places

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.

Values are area averages, not the reading at one weather station. NOAA revises the last two years every month.

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How to cite

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.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December precipitation, counties (Annual precipitation, Williamson County, 1950 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping

MLA 9

NOAA Climate at a Glance, January to December precipitation, counties, Annual precipitation, Williamson County, 1950 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Invokely, https://invokely.ai/en/annual-precipitation/williamson-county-tennessee. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December precipitation, counties. Annual precipitation, Williamson County, 1950 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Also distributed by Invokely, https://invokely.ai/en/annual-precipitation/williamson-county-tennessee.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December precipitation, counties, Annual precipitation, Williamson County, 1950 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/en/annual-precipitation/williamson-county-tennessee (Accessed: 12 October 2026).

BibTeX

@misc{noaa_annual_precipitation_williamson_county_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December precipitation, counties: Annual precipitation, Williamson County, 1950 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/annual-precipitation/williamson-county-tennessee. Publisher attribution: 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.},
}

RIS

TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December precipitation, counties: Annual precipitation, Williamson County, 1950 to 2025
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
L2  - https://invokely.ai/en/annual-precipitation/williamson-county-tennessee
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/annual-precipitation/williamson-county-tennessee.
N1  - Publisher attribution: 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.
ER  -

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Questions

What is the annual precipitation in Williamson County?

Where does this figure come from?

NOAA National Centers for Environmental Information. NOAA Climate at a Glance, January to December precipitation, counties. Retrieved by Invokely on 2026-10-12.

What was the highest annual precipitation in Williamson County?

72.86 inches in 1979, the highest value since 1950 in this series.

Related statistics for Williamson County

All statistics for Williamson County | Williamson County in figures