The Valley Threshold Days by Year

5 fixed thresholds counted per year at The Valley (ASN00033071): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for The Valley Thresholds

The Valley: days with 10 mm (0.39 in) or more of precipitation in 89 years, most in 1956 with 67.
The Valley: days with 25 mm (0.98 in) or more of precipitation in 89 years, most in 1956 with 37.
The Valley: days with 50 mm (1.97 in) or more of precipitation in 88 years, most in 1974 with 17.
The Valley: days with 100 mm (3.94 in) or more of precipitation in 63 years, most in 1990 with 9.
5 fixed thresholds have at least one qualifying day at The Valley.

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

89 years with a qualifying day

Days per year at The Valley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 67 in 1956.

Days with 10 mm (0.39 in) or more of precipitation per year at The Valley
Year	Days	Decade average
1915	18	32.2
1916	33	32.2
1917	49	32.2
1918	40	32.2
1919	21	32.2
1922	20	28.1
1923	19	28.1
1924	36	28.1
1925	23	28.1
1926	23	28.1
1927	40	28.1
1928	37	28.1
1929	27	28.1
1930	37	29.5
1931	30	29.5
1932	21	29.5
1933	36	29.5
1934	20	29.5
1935	14	29.5
1936	46	29.5
1937	28	29.5
1938	32	29.5
1939	31	29.5
1940	31	34.1
1941	53	34.1
1942	43	34.1
1943	33	34.1
1944	33	34.1
1945	30	34.1
1946	29	34.1
1947	35	34.1
1948	25	34.1
1949	29	34.1
1950	56	39.9
1951	25	39.9
1952	31	39.9
1953	23	39.9
1954	46	39.9
1955	48	39.9
1956	67	39.9
1957	21	39.9
1958	45	39.9
1959	37	39.9
1960	31	29.2
1961	29	29.2
1962	28	29.2
1963	37	29.2
1964	29	29.2
1965	24	29.2
1966	28	29.2
1967	33	29.2
1968	31	29.2
1969	22	29.2
1970	29	39.2
1971	40	39.2
1972	19	39.2
1973	39	39.2
1974	54	39.2
1975	42	39.2
1976	57	39.2
1977	36	39.2
1978	35	39.2
1979	41	39.2
1980	30	31
1981	49	31
1982	26	31
1983	33	31
1984	28	31
1985	24	31
1986	18	31
1987	26	31
1988	37	31
1989	39	31
1990	34	29
1991	28	29
1992	19	29
1993	29	29
1994	23	29
1995	24	29
1996	22	29
1997	36	29
1998	37	29
1999	38	29
2000	44	44
2018	27	25.5
2019	24	25.5
2020	47	37.7
2021	38	37.7
2023	28	37.7

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

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

Every Fixed Threshold

Fixed thresholds at The Valley
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	89	67	1956	28
25 mm (0.98 in): Days with 25 mm or more rain	89	37	1956	17
50 mm (1.97 in): Days with 50 mm or more rain	88	17	1974	10
100 mm (3.94 in): Days with 100 mm or more rain	63	9	1990	3
200 mm (7.87 in): Days with 200 mm or more rain	25	4	1951	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for The Valley 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

The Valley Threshold Days by Year

Key Facts for The Valley Thresholds

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

Every Fixed Threshold

Download the Data

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