Clifton Threshold Days by Year (SF000565970)

4 fixed thresholds counted per year at Clifton (SF000565970): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clifton Thresholds

Clifton: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 1974 with 29.
Clifton: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 1935 with 10.
Clifton: days with 50 mm (1.97 in) or more of precipitation in 42 years, most in 1940 with 3.
Clifton: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1967 with 2.
4 fixed thresholds have at least one qualifying day at Clifton.

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

62 years with a qualifying day

Days per year at Clifton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 29 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Clifton
Year	Days	Decade average
1929	14	14
1930	21	18.8
1931	22	18.8
1934	19	18.8
1935	21	18.8
1936	18	18.8
1937	6	18.8
1938	20	18.8
1939	23	18.8
1940	20	15.9
1941	14	15.9
1942	18	15.9
1943	16	15.9
1944	21	15.9
1945	9	15.9
1947	17	15.9
1948	17	15.9
1949	11	15.9
1950	15	15.8
1951	18	15.8
1952	15	15.8
1953	18	15.8
1954	20	15.8
1955	17	15.8
1956	14	15.8
1957	7	15.8
1958	13	15.8
1959	21	15.8
1960	16	15.2
1961	14	15.2
1962	10	15.2
1963	27	15.2
1964	17	15.2
1965	14	15.2
1966	9	15.2
1967	18	15.2
1968	15	15.2
1969	12	15.2
1970	11	20.5
1971	22	20.5
1972	13	20.5
1973	21	20.5
1974	29	20.5
1975	21	20.5
1976	22	20.5
1977	25	20.5
1978	17	20.5
1979	24	20.5
1980	14	16
1981	22	16
1982	16	16
1983	16	16
1984	14	16
1985	15	16
1986	16	16
1987	11	16
1988	19	16
1989	17	16
1990	17	16.8
1991	16	16.8
1992	11	16.8
1993	23	16.8

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

First to last qualifying date each year at Clifton
Year	First date	Last date
1929	1929-01-18	1929-12-30
1930	1930-01-03	1930-12-29
1931	1931-01-01	1931-12-31
1934	1934-01-08	1934-11-19
1935	1935-01-03	1935-12-18
1936	1936-01-16	1936-12-04
1937	1937-05-12	1937-12-20
1938	1938-01-21	1938-12-31
1939	1939-01-21	1939-12-04
1940	1940-01-20	1940-11-10
1941	1941-02-01	1941-12-22
1942	1942-01-25	1942-12-13
1943	1943-01-12	1943-12-19
1944	1944-01-06	1944-12-21
1945	1945-02-01	1945-10-15
1947	1947-03-06	1947-12-04
1948	1948-01-12	1948-12-22
1949	1949-01-14	1949-11-29
1950	1950-05-17	1950-12-30
1951	1951-01-07	1951-12-12
1952	1952-02-01	1952-09-26
1953	1953-02-08	1953-12-13
1954	1954-01-11	1954-11-08
1955	1955-01-03	1955-12-05
1956	1956-02-16	1956-12-20
1957	1957-02-21	1957-11-07
1958	1958-03-20	1958-12-21
1959	1959-01-02	1959-12-03
1960	1960-01-04	1960-12-28
1961	1961-01-08	1961-12-25
1962	1962-02-11	1962-11-20
1963	1963-01-04	1963-12-12
1964	1964-01-01	1964-12-26
1965	1965-01-31	1965-12-17
1966	1966-01-31	1966-12-04
1967	1967-01-30	1967-11-28
1968	1968-02-23	1968-09-02
1969	1969-01-21	1969-10-18
1970	1970-01-31	1970-12-06
1971	1971-01-25	1971-12-11
1972	1972-01-09	1972-11-03
1973	1973-02-17	1973-12-05
1974	1974-01-15	1974-11-29
1975	1975-01-02	1975-12-22
1976	1976-01-09	1976-12-31
1977	1977-02-04	1977-12-31
1978	1978-03-03	1978-12-22
1979	1979-01-02	1979-12-24
1980	1980-01-21	1980-12-28
1981	1981-01-24	1981-12-23
1982	1982-01-11	1982-12-05
1983	1983-01-18	1983-12-31
1984	1984-03-06	1984-12-04
1985	1985-01-14	1985-12-20
1986	1986-02-05	1986-11-26
1987	1987-02-09	1987-12-22
1988	1988-01-15	1988-12-24
1989	1989-01-31	1989-11-15
1990	1990-01-31	1990-11-05
1991	1991-01-07	1991-11-10
1992	1992-01-01	1992-11-12
1993	1993-01-09	1993-12-29

Every Fixed Threshold

Fixed thresholds at Clifton
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	62	29	1974	23
25 mm (0.98 in): Days with 25 mm or more rain	57	10	1935	10
50 mm (1.97 in): Days with 50 mm or more rain	42	3	1940	1
100 mm (3.94 in): Days with 100 mm or more rain	6	2	1967	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1929.

Download the Data

Data for Clifton 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).

Clifton Threshold Days by Year (SF000565970)

Key Facts for Clifton Thresholds

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

Every Fixed Threshold

Download the Data

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