Rooikop Threshold Days by Year (SF005512810)

4 fixed thresholds counted per year at Rooikop (SF005512810): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rooikop Thresholds

Rooikop: days with 10 mm (0.39 in) or more of precipitation in 64 years, most in 1939 with 31.
Rooikop: days with 25 mm (0.98 in) or more of precipitation in 64 years, most in 1967 with 12.
Rooikop: days with 50 mm (1.97 in) or more of precipitation in 42 years, most in 1978 with 4.
Rooikop: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1962 with 1.
4 fixed thresholds have at least one qualifying day at Rooikop.

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

64 years with a qualifying day

Days per year at Rooikop with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1939.

Days with 10 mm (0.39 in) or more of precipitation per year at Rooikop
Year	Days	Decade average
1925	23	19.2
1926	12	19.2
1927	21	19.2
1928	21	19.2
1929	19	19.2
1930	19	18.6
1931	17	18.6
1932	21	18.6
1933	21	18.6
1934	14	18.6
1935	10	18.6
1936	25	18.6
1937	16	18.6
1938	12	18.6
1939	31	18.6
1940	22	19.6
1941	21	19.6
1942	18	19.6
1944	25	19.6
1945	12	19.6
1946	19	19.6
1948	20	19.6
1950	15	20.8
1951	24	20.8
1952	14	20.8
1953	28	20.8
1954	23	20.8
1955	27	20.8
1956	23	20.8
1957	20	20.8
1958	13	20.8
1959	21	20.8
1960	16	18
1961	19	18
1962	16	18
1963	16	18
1964	20	18
1965	8	18
1967	23	18
1968	17	18
1969	27	18
1970	17	21
1971	22	21
1972	19	21
1973	26	21
1974	21	21
1975	23	21
1976	20	21
1977	24	21
1978	17	21
1979	21	21
1980	26	21.1
1981	17	21.1
1982	22	21.1
1983	24	21.1
1984	15	21.1
1985	23	21.1
1986	14	21.1
1987	20	21.1
1988	22	21.1
1989	28	21.1
1990	17	17.3
1991	30	17.3
1992	5	17.3

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

First to last qualifying date each year at Rooikop
Year	First date	Last date
1925	1925-01-05	1925-12-09
1926	1926-01-01	1926-12-20
1927	1927-01-02	1927-12-11
1928	1928-01-05	1928-12-24
1929	1929-02-17	1929-12-20
1930	1930-01-10	1930-12-20
1931	1931-01-12	1931-12-31
1932	1932-01-06	1932-12-26
1933	1933-01-15	1933-12-24
1934	1934-01-14	1934-12-27
1935	1935-01-19	1935-12-29
1936	1936-01-01	1936-12-28
1937	1937-01-02	1937-12-19
1938	1938-01-05	1938-11-26
1939	1939-01-06	1939-12-22
1940	1940-01-16	1940-12-28
1941	1941-01-13	1941-12-20
1942	1942-01-03	1942-12-17
1944	1944-01-03	1944-12-27
1945	1945-01-07	1945-12-18
1946	1946-01-09	1946-12-21
1948	1948-01-03	1948-12-31
1950	1950-01-09	1950-12-31
1951	1951-01-02	1951-12-23
1952	1952-01-03	1952-12-13
1953	1953-01-03	1953-12-23
1954	1954-01-09	1954-12-28
1955	1955-01-04	1955-12-31
1956	1956-01-14	1956-12-29
1957	1957-01-01	1957-12-12
1958	1958-03-15	1958-12-11
1959	1959-01-06	1959-12-06
1960	1960-01-23	1960-12-30
1961	1961-01-14	1961-12-26
1962	1962-01-27	1962-12-31
1963	1963-01-11	1963-12-13
1964	1964-01-02	1964-12-21
1965	1965-04-14	1965-12-21
1967	1967-01-01	1967-12-21
1968	1968-01-14	1968-12-30
1969	1969-01-07	1969-12-24
1970	1970-02-05	1970-12-30
1971	1971-01-03	1971-12-15
1972	1972-01-17	1972-12-01
1973	1973-01-10	1973-12-18
1974	1974-01-18	1974-12-12
1975	1975-01-02	1975-12-31
1976	1976-01-07	1976-12-28
1977	1977-01-12	1977-12-31
1978	1978-01-01	1978-11-26
1979	1979-01-13	1979-12-27
1980	1980-01-04	1980-12-20
1981	1981-01-05	1981-12-08
1982	1982-01-01	1982-12-28
1983	1983-01-01	1983-12-26
1984	1984-01-07	1984-12-20
1985	1985-01-05	1985-12-26
1986	1986-01-14	1986-12-28
1987	1987-01-08	1987-12-12
1988	1988-01-05	1988-12-29
1989	1989-01-07	1989-12-22
1990	1990-01-24	1990-12-14
1991	1991-01-01	1991-12-26
1992	1992-01-21	1992-10-20

Every Fixed Threshold

Fixed thresholds at Rooikop
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	64	31	1939	5
25 mm (0.98 in): Days with 25 mm or more rain	64	12	1967	1
50 mm (1.97 in): Days with 50 mm or more rain	42	4	1978	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1962	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1925.

Download the Data

Data for Rooikop 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).

Rooikop Threshold Days by Year (SF005512810)

Key Facts for Rooikop Thresholds

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

Every Fixed Threshold

Download the Data

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