Tangley Threshold Days by Year

4 fixed thresholds counted per year at Tangley (ASN00056030): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tangley Thresholds

Tangley: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1917 with 40.
Tangley: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1921 with 17.
Tangley: days with 50 mm (1.97 in) or more of precipitation in 35 years, most in 1921 with 7.
Tangley: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1903 with 1.
4 fixed thresholds have at least one qualifying day at Tangley.

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

65 years with a qualifying day

Days per year at Tangley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1917.

Days with 10 mm (0.39 in) or more of precipitation per year at Tangley
Year	Days	Decade average
1901	24	28.7
1902	18	28.7
1903	37	28.7
1904	29	28.7
1905	30	28.7
1906	24	28.7
1907	38	28.7
1908	28	28.7
1909	30	28.7
1910	29	27.8
1911	27	27.8
1912	22	27.8
1913	29	27.8
1914	30	27.8
1915	25	27.8
1916	36	27.8
1917	40	27.8
1919	12	27.8
1920	25	24.9
1921	33	24.9
1922	21	24.9
1923	17	24.9
1924	32	24.9
1925	25	24.9
1926	21	24.9
1927	23	24.9
1928	27	24.9
1930	29	25.8
1931	38	25.8
1932	19	25.8
1933	39	25.8
1934	26	25.8
1935	17	25.8
1937	20	25.8
1938	22	25.8
1939	22	25.8
1940	12	22.3
1941	18	22.3
1942	22	22.3
1943	22	22.3
1944	19	22.3
1945	24	22.3
1946	18	22.3
1947	27	22.3
1948	25	22.3
1949	36	22.3
1950	36	26.9
1952	31	26.9
1953	21	26.9
1954	22	26.9
1955	26	26.9
1956	26	26.9
1957	16	26.9
1958	29	26.9
1959	35	26.9
1960	22	25.4
1961	30	25.4
1962	25	25.4
1963	31	25.4
1964	26	25.4
1965	15	25.4
1966	25	25.4
1967	20	25.4
1968	35	25.4
1970	24	24

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

First to last qualifying date each year at Tangley
Year	First date	Last date
1901	1901-01-01	1901-12-05
1902	1902-01-03	1902-12-18
1903	1903-03-25	1903-12-25
1904	1904-01-04	1904-12-18
1905	1905-01-16	1905-12-28
1906	1906-01-01	1906-12-22
1907	1907-01-02	1907-12-20
1908	1908-02-03	1908-12-13
1909	1909-01-21	1909-12-25
1910	1910-01-10	1910-12-18
1911	1911-01-03	1911-12-03
1912	1912-01-02	1912-12-20
1913	1913-01-02	1913-12-19
1914	1914-01-02	1914-12-31
1915	1915-01-01	1915-12-19
1916	1916-01-12	1916-12-13
1917	1917-01-18	1917-12-09
1919	1919-02-19	1919-12-27
1920	1920-01-01	1920-12-08
1921	1921-02-10	1921-12-31
1922	1922-02-28	1922-12-25
1923	1923-01-09	1923-12-25
1924	1924-01-05	1924-12-16
1925	1925-01-08	1925-12-31
1926	1926-01-05	1926-12-28
1927	1927-01-21	1927-12-18
1928	1928-01-18	1928-12-21
1930	1930-01-03	1930-12-18
1931	1931-01-09	1931-12-22
1932	1932-01-02	1932-12-30
1933	1933-01-01	1933-12-22
1934	1934-01-28	1934-12-28
1935	1935-01-05	1935-12-09
1937	1937-01-10	1937-12-29
1938	1938-01-21	1938-11-25
1939	1939-01-19	1939-12-27
1940	1940-01-08	1940-12-30
1941	1941-01-05	1941-11-20
1942	1942-01-17	1942-12-28
1943	1943-01-01	1943-12-29
1944	1944-01-01	1944-12-20
1945	1945-01-11	1945-12-19
1946	1946-01-02	1946-12-06
1947	1947-01-29	1947-12-17
1948	1948-01-02	1948-12-18
1949	1949-01-09	1949-12-09
1950	1950-01-01	1950-11-25
1952	1952-01-09	1952-12-31
1953	1953-01-07	1953-12-26
1954	1954-01-01	1954-12-13
1955	1955-01-22	1955-12-20
1956	1956-01-21	1956-12-14
1957	1957-01-04	1957-12-16
1958	1958-01-01	1958-12-26
1959	1959-01-02	1959-12-26
1960	1960-01-20	1960-12-03
1961	1961-01-02	1961-12-31
1962	1962-01-02	1962-12-31
1963	1963-01-02	1963-12-30
1964	1964-01-12	1964-12-30
1965	1965-01-25	1965-12-15
1966	1966-01-27	1966-11-24
1967	1967-02-26	1967-12-30
1968	1968-01-05	1968-12-24
1970	1970-01-01	1970-11-19

Every Fixed Threshold

Fixed thresholds at Tangley
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	65	40	1917	24
25 mm (0.98 in): Days with 25 mm or more rain	65	17	1921	8
50 mm (1.97 in): Days with 50 mm or more rain	35	7	1921	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1903	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

Data for Tangley 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Tangley Threshold Days by Year

Key Facts for Tangley Thresholds

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

Every Fixed Threshold

Download the Data

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