Shelford Threshold Days by Year (ASN00087059)

4 fixed thresholds counted per year at Shelford (ASN00087059): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shelford Thresholds

Shelford: days with 10 mm (0.39 in) or more of precipitation in 107 years, most in 1952 with 31.
Shelford: days with 25 mm (0.98 in) or more of precipitation in 85 years, most in 1978 with 8.
Shelford: days with 50 mm (1.97 in) or more of precipitation in 22 years, most in 1933 with 2.
Shelford: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1973 with 1.
4 fixed thresholds have at least one qualifying day at Shelford.

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

107 years with a qualifying day

Days per year at Shelford with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1952.

Days with 10 mm (0.39 in) or more of precipitation per year at Shelford
Year	Days	Decade average
1887	19	15
1888	11	15
1891	13	13.9
1892	14	13.9
1893	20	13.9
1894	15	13.9
1895	18	13.9
1896	13	13.9
1897	9	13.9
1898	9	13.9
1899	14	13.9
1900	16	14.5
1901	13	14.5
1902	11	14.5
1903	18	14.5
1904	15	14.5
1905	11	14.5
1906	19	14.5
1907	14	14.5
1908	12	14.5
1909	16	14.5
1910	17	13
1911	14	13
1912	13	13
1914	8	13
1915	6	13
1916	20	13
1917	13	13
1920	8	8.5
1921	11	8.5
1923	12	8.5
1925	5	8.5
1926	6	8.5
1927	3	8.5
1928	11	8.5
1929	12	8.5
1930	16	13.8
1931	17	13.8
1932	12	13.8
1933	13	13.8
1934	20	13.8
1935	11	13.8
1936	12	13.8
1937	12	13.8
1938	10	13.8
1939	15	13.8
1940	8	13.1
1941	17	13.1
1942	16	13.1
1943	11	13.1
1944	3	13.1
1945	13	13.1
1946	16	13.1
1947	19	13.1
1948	10	13.1
1949	18	13.1
1950	15	17.1
1951	25	17.1
1952	31	17.1
1953	11	17.1
1954	14	17.1
1955	21	17.1
1956	14	17.1
1957	15	17.1
1958	9	17.1
1959	16	17.1
1960	16	12.4
1961	8	12.4
1962	7	12.4
1963	14	12.4
1964	22	12.4
1965	12	12.4
1966	14	12.4
1967	4	12.4
1968	12	12.4
1969	15	12.4
1970	23	18.2
1971	20	18.2
1972	12	18.2
1973	19	18.2
1974	16	18.2
1975	16	18.2
1976	16	18.2
1977	18	18.2
1978	27	18.2
1979	15	18.2
1980	13	15.3
1981	19	15.3
1982	6	15.3
1983	23	15.3
1991	17	14.4
1992	25	14.4
1993	20	14.4
1994	11	14.4
1995	14	14.4
1996	12	14.4
1997	8	14.4
1998	10	14.4
1999	13	14.4
2000	13	12
2001	16	12
2002	8	12
2003	11	12
2004	14	12
2005	11	12
2006	8	12
2007	15	12

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

First to last qualifying date each year at Shelford
Year	First date	Last date
1887	1887-01-08	1887-12-24
1888	1888-03-04	1888-12-31
1891	1891-04-13	1891-12-15
1892	1892-03-14	1892-12-13
1893	1893-03-04	1893-11-19
1894	1894-02-27	1894-12-23
1895	1895-01-03	1895-12-09
1896	1896-01-12	1896-09-16
1897	1897-01-08	1897-09-05
1898	1898-04-02	1898-12-22
1899	1899-02-25	1899-11-07
1900	1900-01-19	1900-09-11
1901	1901-01-03	1901-10-15
1902	1902-03-25	1902-12-20
1903	1903-01-18	1903-12-12
1904	1904-01-14	1904-11-02
1905	1905-01-30	1905-12-03
1906	1906-02-27	1906-11-27
1907	1907-01-06	1907-12-28
1908	1908-01-10	1908-11-22
1909	1909-01-04	1909-12-23
1910	1910-03-06	1910-12-22
1911	1911-02-07	1911-12-13
1912	1912-02-08	1912-12-04
1914	1914-01-12	1914-12-26
1915	1915-01-20	1915-08-12
1916	1916-01-28	1916-12-09
1917	1917-01-22	1917-12-31
1920	1920-03-07	1920-11-15
1921	1921-05-04	1921-11-15
1923	1923-01-06	1923-12-14
1925	1925-04-07	1925-11-20
1926	1926-05-02	1926-10-08
1927	1927-07-26	1927-12-01
1928	1928-01-18	1928-10-06
1929	1929-01-30	1929-12-28
1930	1930-02-21	1930-12-25
1931	1931-01-25	1931-12-01
1932	1932-02-05	1932-12-01
1933	1933-03-05	1933-12-15
1934	1934-01-09	1934-12-26
1935	1935-01-05	1935-11-16
1936	1936-02-09	1936-12-17
1937	1937-01-19	1937-12-08
1938	1938-01-15	1938-11-04
1939	1939-02-24	1939-11-27
1940	1940-01-06	1940-12-20
1941	1941-01-25	1941-11-21
1942	1942-01-20	1942-12-19
1943	1943-02-18	1943-12-17
1944	1944-01-22	1944-10-16
1945	1945-01-16	1945-12-27
1946	1946-01-17	1946-12-28
1947	1947-02-04	1947-12-23
1948	1948-01-06	1948-11-06
1949	1949-02-20	1949-11-22
1950	1950-02-02	1950-12-20
1951	1951-01-12	1951-12-10
1952	1952-01-25	1952-12-11
1953	1953-01-06	1953-11-27
1954	1954-03-22	1954-12-12
1955	1955-01-29	1955-12-31
1956	1956-03-06	1956-12-19
1957	1957-03-14	1957-12-26
1958	1958-02-20	1958-12-10
1959	1959-02-14	1959-12-26
1960	1960-02-01	1960-12-16
1961	1961-03-01	1961-12-14
1962	1962-03-15	1962-10-25
1963	1963-01-14	1963-12-06
1964	1964-02-07	1964-12-26
1965	1965-01-18	1965-12-03
1966	1966-01-13	1966-12-05
1967	1967-08-12	1967-12-30
1968	1968-01-21	1968-12-16
1969	1969-01-15	1969-12-13
1970	1970-01-02	1970-12-29
1971	1971-01-01	1971-12-23
1972	1972-01-10	1972-11-10
1973	1973-01-13	1973-12-22
1974	1974-01-14	1974-12-20
1975	1975-01-11	1975-12-04
1976	1976-03-01	1976-12-24
1977	1977-01-17	1977-11-10
1978	1978-01-29	1978-12-26
1979	1979-01-21	1979-11-12
1980	1980-01-12	1980-12-14
1981	1981-01-10	1981-12-13
1982	1982-01-26	1982-12-08
1983	1983-02-23	1983-11-08
1991	1991-01-05	1991-12-31
1992	1992-02-06	1992-12-28
1993	1993-01-25	1993-12-28
1994	1994-02-01	1994-12-22
1995	1995-01-06	1995-12-04
1996	1996-01-01	1996-12-07
1997	1997-01-22	1997-11-14
1998	1998-01-13	1998-12-27
1999	1999-01-07	1999-12-27
2000	2000-04-05	2000-12-23
2001	2001-02-13	2001-12-07
2002	2002-02-08	2002-11-26
2003	2003-01-01	2003-12-22
2004	2004-01-05	2004-12-14
2005	2005-02-02	2005-11-15
2006	2006-01-02	2006-09-07
2007	2007-01-20	2007-11-29

Every Fixed Threshold

Fixed thresholds at Shelford
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	107	31	1952	15
25 mm (0.98 in): Days with 25 mm or more rain	85	8	1978	2
50 mm (1.97 in): Days with 50 mm or more rain	22	2	1933	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1973	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1887.

Download the Data

Data for Shelford 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).

Shelford Threshold Days by Year (ASN00087059)

Key Facts for Shelford Thresholds

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

Every Fixed Threshold

Download the Data

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