Cowes Threshold Days by Year

3 fixed thresholds counted per year at Cowes (ASN00086025): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cowes Thresholds

Cowes: days with 10 mm (0.39 in) or more of precipitation in 86 years, most in 1889 with 37.
Cowes: days with 25 mm (0.98 in) or more of precipitation in 81 years, most in 1889 with 9.
Cowes: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1949 with 3.
3 fixed thresholds have at least one qualifying day at Cowes.

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

86 years with a qualifying day

Days per year at Cowes with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1889.

Days with 10 mm (0.39 in) or more of precipitation per year at Cowes
Year	Days	Decade average
1883	26	30.2
1885	32	30.2
1886	27	30.2
1887	34	30.2
1888	25	30.2
1889	37	30.2
1894	26	20.3
1895	15	20.3
1896	20	20.3
1897	26	20.3
1898	17	20.3
1899	18	20.3
1900	26	20.6
1901	22	20.6
1902	13	20.6
1903	24	20.6
1904	20	20.6
1905	24	20.6
1906	22	20.6
1907	19	20.6
1908	12	20.6
1909	24	20.6
1910	26	19.9
1911	24	19.9
1912	16	19.9
1913	20	19.9
1914	13	19.9
1915	17	19.9
1916	26	19.9
1917	24	19.9
1918	17	19.9
1919	16	19.9
1920	20	17.6
1921	24	17.6
1922	13	17.6
1923	19	17.6
1924	24	17.6
1925	15	17.6
1926	17	17.6
1927	4	17.6
1928	17	17.6
1929	23	17.6
1930	15	20.1
1931	22	20.1
1932	27	20.1
1933	17	20.1
1934	21	20.1
1935	23	20.1
1936	21	20.1
1937	14	20.1
1938	13	20.1
1939	28	20.1
1940	16	19.6
1941	16	19.6
1942	20	19.6
1943	21	19.6
1944	16	19.6
1945	14	19.6
1946	21	19.6
1947	25	19.6
1948	24	19.6
1949	23	19.6
1950	18	24.7
1951	28	24.7
1952	36	24.7
1953	27	24.7
1958	21	24.7
1959	18	24.7
1960	23	21.1
1961	21	21.1
1962	24	21.1
1963	18	21.1
1964	28	21.1
1965	15	21.1
1966	23	21.1
1967	13	21.1
1968	25	21.1
1969	21	21.1
1970	20	21.5
1971	20	21.5
1972	15	21.5
1973	26	21.5
1974	23	21.5
1975	24	21.5
1976	21	21.5
1977	23	21.5

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

First to last qualifying date each year at Cowes
Year	First date	Last date
1883	1883-01-01	1883-12-14
1885	1885-01-06	1885-12-23
1886	1886-01-07	1886-12-19
1887	1887-01-15	1887-12-18
1888	1888-01-02	1888-12-31
1889	1889-01-01	1889-12-17
1894	1894-02-28	1894-12-14
1895	1895-01-04	1895-12-10
1896	1896-01-13	1896-11-28
1897	1897-01-09	1897-12-23
1898	1898-03-14	1898-11-26
1899	1899-01-11	1899-11-07
1900	1900-01-19	1900-09-27
1901	1901-01-12	1901-11-14
1902	1902-03-25	1902-12-24
1903	1903-02-15	1903-12-12
1904	1904-01-01	1904-11-24
1905	1905-01-15	1905-12-03
1906	1906-03-10	1906-11-28
1907	1907-03-05	1907-12-29
1908	1908-01-10	1908-10-08
1909	1909-01-04	1909-12-01
1910	1910-01-12	1910-12-24
1911	1911-01-06	1911-12-26
1912	1912-04-08	1912-12-26
1913	1913-02-05	1913-12-31
1914	1914-01-12	1914-12-26
1915	1915-01-07	1915-11-29
1916	1916-01-28	1916-12-12
1917	1917-01-22	1917-12-04
1918	1918-02-03	1918-12-26
1919	1919-01-07	1919-12-28
1920	1920-03-15	1920-12-17
1921	1921-01-02	1921-11-26
1922	1922-02-22	1922-12-10
1923	1923-01-19	1923-12-15
1924	1924-01-28	1924-12-27
1925	1925-01-13	1925-11-20
1926	1926-01-08	1926-11-17
1927	1927-03-19	1927-11-01
1928	1928-01-18	1928-12-23
1929	1929-01-30	1929-12-28
1930	1930-02-21	1930-12-27
1931	1931-01-26	1931-11-17
1932	1932-02-06	1932-12-25
1933	1933-03-05	1933-12-15
1934	1934-01-08	1934-12-30
1935	1935-01-05	1935-12-21
1936	1936-02-20	1936-12-18
1937	1937-01-25	1937-11-16
1938	1938-01-07	1938-12-01
1939	1939-02-17	1939-12-05
1940	1940-01-06	1940-12-20
1941	1941-01-25	1941-12-04
1942	1942-01-20	1942-12-19
1943	1943-01-03	1943-11-18
1944	1944-01-23	1944-12-21
1945	1945-01-31	1945-12-27
1946	1946-01-17	1946-12-29
1947	1947-01-08	1947-12-25
1948	1948-01-05	1948-12-28
1949	1949-02-21	1949-11-29
1950	1950-02-02	1950-12-20
1951	1951-02-18	1951-12-20
1952	1952-02-11	1952-12-11
1953	1953-01-06	1953-12-09
1958	1958-02-20	1958-12-12
1959	1959-01-26	1959-12-27
1960	1960-01-09	1960-11-13
1961	1961-01-03	1961-12-18
1962	1962-01-20	1962-12-31
1963	1963-01-14	1963-12-06
1964	1964-01-15	1964-12-09
1965	1965-04-19	1965-12-06
1966	1966-01-13	1966-12-16
1967	1967-01-13	1967-12-13
1968	1968-03-25	1968-12-24
1969	1969-01-26	1969-11-06
1970	1970-01-02	1970-12-29
1971	1971-01-01	1971-12-23
1972	1972-01-01	1972-10-12
1973	1973-01-13	1973-12-22
1974	1974-03-25	1974-12-28
1975	1975-03-18	1975-11-24
1976	1976-03-01	1976-12-16
1977	1977-01-15	1977-11-10

Every Fixed Threshold

Fixed thresholds at Cowes
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	86	37	1889	23
25 mm (0.98 in): Days with 25 mm or more rain	81	9	1889	4
50 mm (1.97 in): Days with 50 mm or more rain	16	3	1949	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1883.

Download the Data

Data for Cowes 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).

Cowes Threshold Days by Year

Key Facts for Cowes Thresholds

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

Every Fixed Threshold

Download the Data

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