Ormley Threshold Days by Year (ASN00092029)

4 fixed thresholds counted per year at Ormley (ASN00092029): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ormley Thresholds

Ormley: days with 10 mm (0.39 in) or more of precipitation in 114 years, most in 1916 with 27.
Ormley: days with 25 mm (0.98 in) or more of precipitation in 108 years, most in 1970 with 9.
Ormley: days with 50 mm (1.97 in) or more of precipitation in 47 years, most in 1938 with 3.
Ormley: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1970 with 1.
4 fixed thresholds have at least one qualifying day at Ormley.

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

114 years with a qualifying day

Days per year at Ormley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 27 in 1916.

Days with 10 mm (0.39 in) or more of precipitation per year at Ormley
Year	Days	Decade average
1897	15	13
1898	11	13
1904	12	10
1907	10	10
1908	8	10
1909	10	10
1910	14	12.9
1911	13	12.9
1912	13	12.9
1913	5	12.9
1914	10	12.9
1915	15	12.9
1916	27	12.9
1917	17	12.9
1918	11	12.9
1919	4	12.9
1920	11	13.7
1921	14	13.7
1922	19	13.7
1923	15	13.7
1924	12	13.7
1925	10	13.7
1926	14	13.7
1927	10	13.7
1928	14	13.7
1929	18	13.7
1930	17	17
1931	16	17
1932	17	17
1933	9	17
1934	23	17
1935	18	17
1936	14	17
1937	20	17
1938	17	17
1939	19	17
1940	7	13.4
1941	13	13.4
1942	16	13.4
1943	12	13.4
1944	16	13.4
1945	8	13.4
1946	16	13.4
1947	19	13.4
1948	9	13.4
1949	18	13.4
1950	15	16.3
1951	10	16.3
1952	20	16.3
1953	13	16.3
1954	17	16.3
1955	15	16.3
1956	24	16.3
1957	16	16.3
1958	21	16.3
1959	12	16.3
1960	17	11.6
1961	7	11.6
1962	9	11.6
1963	10	11.6
1964	13	11.6
1965	8	11.6
1966	12	11.6
1967	10	11.6
1968	10	11.6
1969	20	11.6
1970	27	15.8
1971	21	15.8
1972	9	15.8
1973	13	15.8
1974	19	15.8
1975	19	15.8
1976	15	15.8
1977	8	15.8
1978	19	15.8
1979	8	15.8
1980	13	14.6
1981	17	14.6
1982	8	14.6
1983	16	14.6
1984	17	14.6
1985	20	14.6
1986	18	14.6
1987	11	14.6
1988	12	14.6
1989	14	14.6
1990	13	13.3
1991	16	13.3
1992	18	13.3
1993	12	13.3
1994	4	13.3
1995	14	13.3
1996	14	13.3
1997	13	13.3
1998	15	13.3
1999	14	13.3
2000	13	13
2001	16	13
2002	8	13
2003	19	13
2004	12	13
2005	18	13
2006	5	13
2016	22	12.3
2017	6	12.3
2018	16	12.3
2019	5	12.3
2020	20	16.3
2021	14	16.3
2022	26	16.3
2023	17	16.3
2024	17	16.3
2025	14	16.3
2026	6	16.3

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

First to last qualifying date each year at Ormley
Year	First date	Last date
1897	1897-01-04	1897-11-19
1898	1898-04-02	1898-10-27
1904	1904-01-03	1904-11-02
1907	1907-01-27	1907-10-31
1908	1908-03-15	1908-10-25
1909	1909-01-03	1909-08-24
1910	1910-03-09	1910-12-02
1911	1911-02-14	1911-12-08
1912	1912-03-11	1912-12-23
1913	1913-06-26	1913-11-13
1914	1914-03-25	1914-12-27
1915	1915-03-07	1915-11-15
1916	1916-01-09	1916-12-30
1917	1917-01-03	1917-11-23
1918	1918-01-15	1918-12-20
1919	1919-01-07	1919-03-06
1920	1920-01-08	1920-12-07
1921	1921-01-02	1921-12-30
1922	1922-02-21	1922-12-24
1923	1923-01-22	1923-12-10
1924	1924-01-27	1924-11-07
1925	1925-02-02	1925-11-18
1926	1926-04-06	1926-12-23
1927	1927-03-06	1927-12-19
1928	1928-01-21	1928-10-27
1929	1929-01-27	1929-12-28
1930	1930-02-20	1930-12-09
1931	1931-03-03	1931-11-20
1932	1932-02-15	1932-12-24
1933	1933-03-30	1933-11-09
1934	1934-01-09	1934-12-31
1935	1935-01-06	1935-12-21
1936	1936-01-22	1936-12-04
1937	1937-01-03	1937-12-26
1938	1938-01-04	1938-11-28
1939	1939-02-17	1939-12-19
1940	1940-01-19	1940-12-20
1941	1941-01-17	1941-12-06
1942	1942-01-25	1942-12-24
1943	1943-01-04	1943-12-23
1944	1944-01-03	1944-12-21
1945	1945-01-16	1945-12-28
1946	1946-01-20	1946-12-15
1947	1947-01-17	1947-12-21
1948	1948-01-13	1948-12-05
1949	1949-01-16	1949-12-19
1950	1950-01-26	1950-12-20
1951	1951-01-23	1951-11-27
1952	1952-02-23	1952-11-02
1953	1953-01-06	1953-12-10
1954	1954-01-28	1954-12-12
1955	1955-01-29	1955-12-31
1956	1956-01-20	1956-12-27
1957	1957-02-08	1957-12-26
1958	1958-02-19	1958-12-17
1959	1959-01-26	1959-12-26
1960	1960-01-23	1960-11-04
1961	1961-03-02	1961-12-16
1962	1962-02-20	1962-12-11
1963	1963-01-06	1963-12-12
1964	1964-02-07	1964-12-24
1965	1965-01-11	1965-11-25
1966	1966-02-05	1966-10-31
1967	1967-05-27	1967-12-19
1968	1968-03-05	1968-12-25
1969	1969-01-15	1969-12-30
1970	1970-01-02	1970-12-30
1971	1971-01-02	1971-11-18
1972	1972-01-01	1972-10-06
1973	1973-01-13	1973-12-22
1974	1974-01-17	1974-12-26
1975	1975-01-09	1975-11-25
1976	1976-01-09	1976-12-24
1977	1977-01-17	1977-11-29
1978	1978-02-05	1978-12-27
1979	1979-01-21	1979-10-24
1980	1980-02-21	1980-12-21
1981	1981-03-02	1981-11-26
1982	1982-01-07	1982-12-09
1983	1983-01-02	1983-11-17
1984	1984-01-03	1984-11-05
1985	1985-03-02	1985-12-31
1986	1986-01-09	1986-12-17
1987	1987-01-05	1987-12-06
1988	1988-01-31	1988-12-27
1989	1989-01-05	1989-10-28
1990	1990-02-01	1990-12-20
1991	1991-01-05	1991-12-19
1992	1992-01-01	1992-11-20
1993	1993-01-25	1993-12-28
1994	1994-05-14	1994-11-21
1995	1995-01-07	1995-12-19
1996	1996-01-01	1996-10-26
1997	1997-01-23	1997-12-20
1998	1998-01-15	1998-12-27
1999	1999-01-29	1999-12-28
2000	2000-01-04	2000-11-05
2001	2001-03-09	2001-12-23
2002	2002-01-07	2002-10-14
2003	2003-01-30	2003-12-22
2004	2004-01-18	2004-12-01
2005	2005-01-05	2005-12-04
2006	2006-01-31	2006-07-02
2016	2016-01-29	2016-12-30
2017	2017-01-20	2017-12-04
2018	2018-01-30	2018-12-22
2019	2019-02-07	2019-09-08
2020	2020-01-17	2020-12-23
2021	2021-01-04	2021-11-14
2022	2022-01-07	2022-12-24
2023	2023-01-25	2023-12-20
2024	2024-02-21	2024-12-01
2025	2025-01-12	2025-11-08
2026	2026-01-22	2026-07-01

Every Fixed Threshold

Fixed thresholds at Ormley
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	114	27	1916	6
25 mm (0.98 in): Days with 25 mm or more rain	108	9	1970	1
50 mm (1.97 in): Days with 50 mm or more rain	47	3	1938	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1970	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.

Download the Data

Data for Ormley 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Ormley Threshold Days by Year (ASN00092029)

Key Facts for Ormley Thresholds

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

Every Fixed Threshold

Download the Data

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