Williamstown Threshold Days by Year

4 fixed thresholds counted per year at Williamstown (ASN00023752): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williamstown Thresholds

Williamstown: days with 10 mm (0.39 in) or more of precipitation in 108 years, most in 1890 with 37.
Williamstown: days with 25 mm (0.98 in) or more of precipitation in 98 years, most in 1890 with 9.
Williamstown: days with 50 mm (1.97 in) or more of precipitation in 26 years, most in 1889 with 4.
Williamstown: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1889 with 1.
4 fixed thresholds have at least one qualifying day at Williamstown.

Days with 10 mm (0.39 in) or more of precipitation

108 years with a qualifying day

Days per year at Williamstown with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1890.

Days with 10 mm (0.39 in) or more of precipitation per year at Williamstown
Year	Days	Decade average
1884	29	26.5
1885	24	26.5
1886	25	26.5
1887	27	26.5
1888	22	26.5
1889	32	26.5
1890	37	25.8
1891	22	25.8
1892	26	25.8
1893	33	25.8
1894	27	25.8
1895	29	25.8
1896	16	25.8
1897	24	25.8
1898	24	25.8
1899	20	25.8
1900	25	22.3
1901	18	22.3
1902	18	22.3
1903	21	22.3
1904	19	22.3
1905	22	22.3
1906	23	22.3
1907	17	22.3
1908	28	22.3
1909	32	22.3
1910	28	18.9
1911	12	18.9
1912	22	18.9
1913	15	18.9
1914	8	18.9
1915	23	18.9
1916	25	18.9
1917	33	18.9
1918	11	18.9
1919	12	18.9
1920	23	19.4
1921	22	19.4
1922	20	19.4
1923	31	19.4
1925	15	19.4
1926	16	19.4
1927	17	19.4
1928	21	19.4
1929	10	19.4
1930	14	13.9
1931	21	13.9
1932	15	13.9
1933	15	13.9
1934	12	13.9
1935	16	13.9
1936	8	13.9
1937	13	13.9
1938	11	13.9
1940	16	15.4
1941	17	15.4
1942	24	15.4
1943	11	15.4
1944	14	15.4
1945	11	15.4
1946	19	15.4
1947	16	15.4
1948	14	15.4
1949	12	15.4
1950	12	17.2
1951	24	17.2
1952	16	17.2
1953	21	17.2
1954	8	17.2
1955	33	17.2
1956	29	17.2
1957	7	17.2
1958	18	17.2
1959	4	17.2
1960	25	16.1
1961	12	16.1
1962	20	16.1
1963	9	16.1
1964	17	16.1
1965	17	16.1
1966	17	16.1
1967	8	16.1
1968	23	16.1
1969	13	16.1
1970	14	17.3
1971	25	17.3
1972	15	17.3
1973	24	17.3
1976	7	17.3
1978	16	17.3
1979	20	17.3
1983	21	21
1998	12	12
2000	18	18
2013	22	18.6
2014	23	18.6
2015	16	18.6
2016	26	18.6
2017	18	18.6
2018	16	18.6
2019	9	18.6
2020	19	18.4
2021	21	18.4
2022	25	18.4
2023	18	18.4
2024	11	18.4
2025	15	18.4
2026	20	18.4

For each year, a bar from the first to the last day at Williamstown meeting 10 mm (0.39 in).

First to last qualifying date each year at Williamstown
Year	First date	Last date
1884	1884-03-28	1884-12-15
1885	1885-02-28	1885-11-01
1886	1886-01-06	1886-11-25
1887	1887-04-09	1887-12-14
1888	1888-05-03	1888-09-23
1889	1889-01-02	1889-11-15
1890	1890-01-21	1890-11-24
1891	1891-01-05	1891-12-14
1892	1892-01-23	1892-12-14
1893	1893-04-01	1893-11-12
1894	1894-03-24	1894-12-26
1895	1895-01-04	1895-12-17
1896	1896-01-18	1896-12-28
1897	1897-02-15	1897-11-02
1898	1898-02-25	1898-11-25
1899	1899-01-19	1899-11-19
1900	1900-01-21	1900-11-17
1901	1901-01-25	1901-12-31
1902	1902-03-26	1902-12-19
1903	1903-02-15	1903-12-27
1904	1904-01-03	1904-11-03
1905	1905-01-03	1905-10-27
1906	1906-03-24	1906-10-13
1907	1907-02-05	1907-11-23
1908	1908-02-08	1908-10-17
1909	1909-01-05	1909-12-22
1910	1910-03-05	1910-12-23
1911	1911-02-07	1911-12-05
1912	1912-02-23	1912-12-07
1913	1913-02-14	1913-11-11
1914	1914-03-12	1914-12-15
1915	1915-01-19	1915-10-22
1916	1916-01-04	1916-11-25
1917	1917-02-13	1917-12-12
1918	1918-03-06	1918-10-04
1919	1919-02-16	1919-12-27
1920	1920-03-07	1920-12-27
1921	1921-03-01	1921-12-03
1922	1922-01-05	1922-12-26
1923	1923-05-08	1923-12-14
1925	1925-02-07	1925-10-17
1926	1926-05-01	1926-10-14
1927	1927-02-03	1927-12-02
1928	1928-01-27	1928-10-06
1929	1929-01-30	1929-12-28
1930	1930-02-11	1930-10-24
1931	1931-03-13	1931-09-12
1932	1932-02-05	1932-12-15
1933	1933-01-20	1933-12-14
1934	1934-01-06	1934-11-08
1935	1935-01-05	1935-10-19
1936	1936-02-19	1936-12-18
1937	1937-01-19	1937-12-11
1938	1938-01-14	1938-09-16
1940	1940-01-05	1940-12-19
1941	1941-01-24	1941-11-19
1942	1942-01-20	1942-12-05
1943	1943-02-17	1943-12-17
1944	1944-04-02	1944-12-21
1945	1945-01-31	1945-11-17
1946	1946-01-17	1946-12-25
1947	1947-03-12	1947-12-23
1948	1948-04-11	1948-12-25
1949	1949-05-06	1949-11-03
1950	1950-02-01	1950-12-19
1951	1951-02-20	1951-12-20
1952	1952-01-24	1952-11-27
1953	1953-05-19	1953-11-05
1954	1954-04-14	1954-12-24
1955	1955-02-08	1955-12-03
1956	1956-04-17	1956-10-18
1957	1957-04-10	1957-11-07
1958	1958-03-07	1958-10-18
1959	1959-08-12	1959-12-26
1960	1960-02-02	1960-11-12
1961	1961-02-08	1961-11-17
1962	1962-01-17	1962-10-20
1963	1963-05-15	1963-09-12
1964	1964-04-08	1964-11-18
1965	1965-05-08	1965-12-24
1966	1966-03-16	1966-12-01
1967	1967-02-23	1967-12-30
1968	1968-01-20	1968-11-06
1969	1969-02-22	1969-12-02
1970	1970-05-16	1970-12-05
1971	1971-03-15	1971-12-10
1972	1972-01-07	1972-12-27
1973	1973-02-05	1973-12-31
1976	1976-02-26	1976-11-02
1978	1978-04-10	1978-11-20
1979	1979-01-17	1979-11-19
1983	1983-03-02	1983-11-26
1998	1998-01-14	1998-11-11
2000	2000-02-21	2000-12-22
2013	2013-01-14	2013-10-03
2014	2014-01-15	2014-12-11
2015	2015-01-09	2015-11-05
2016	2016-01-30	2016-12-28
2017	2017-01-20	2017-12-01
2018	2018-04-15	2018-11-22
2019	2019-05-26	2019-12-02
2020	2020-02-01	2020-10-30
2021	2021-01-26	2021-11-12
2022	2022-01-23	2022-11-19
2023	2023-01-29	2023-12-12
2024	2024-01-07	2024-11-27
2025	2025-05-27	2025-11-29
2026	2026-03-17	2026-10-02

Every Fixed Threshold

Fixed thresholds at Williamstown
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	108	37	1890	20
25 mm (0.98 in): Days with 25 mm or more rain	98	9	1890	4
50 mm (1.97 in): Days with 50 mm or more rain	26	4	1889	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1889	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1884.

Download the Data

Data for Williamstown threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Williamstown Threshold Days by Year

Key Facts for Williamstown Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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