Zoetvlei Threshold Days by Year (SF001183950)

3 fixed thresholds counted per year at Zoetvlei (SF001183950): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Zoetvlei Thresholds

Zoetvlei: days with 10 mm (0.39 in) or more of precipitation in 78 years, most in 1963 with 25.
Zoetvlei: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1974 with 7.
Zoetvlei: days with 50 mm (1.97 in) or more of precipitation in 17 years, most in 1918 with 1.
3 fixed thresholds have at least one qualifying day at Zoetvlei.

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

78 years with a qualifying day

Days per year at Zoetvlei with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 25 in 1963.

Days with 10 mm (0.39 in) or more of precipitation per year at Zoetvlei
Year	Days	Decade average
1908	6	9.5
1909	13	9.5
1910	10	9
1912	6	9
1913	14	9
1914	12	9
1915	2	9
1916	10	9
1917	11	9
1918	10	9
1919	6	9
1920	15	9.9
1921	17	9.9
1922	3	9.9
1923	8	9.9
1924	9	9.9
1925	17	9.9
1926	3	9.9
1927	4	9.9
1928	11	9.9
1929	12	9.9
1930	10	8.4
1931	10	8.4
1932	6	8.4
1933	4	8.4
1934	10	8.4
1935	14	8.4
1936	8	8.4
1937	4	8.4
1938	10	8.4
1940	11	10.5
1941	10	10.5
1942	14	10.5
1943	16	10.5
1944	7	10.5
1945	9	10.5
1946	15	10.5
1947	11	10.5
1948	8	10.5
1949	4	10.5
1950	17	10.8
1951	5	10.8
1952	11	10.8
1953	9	10.8
1954	9	10.8
1955	14	10.8
1956	14	10.8
1957	8	10.8
1958	13	10.8
1959	8	10.8
1960	12	11.6
1961	20	11.6
1962	9	11.6
1963	25	11.6
1964	12	11.6
1965	11	11.6
1966	4	11.6
1967	10	11.6
1968	5	11.6
1969	8	11.6
1970	6	13.1
1971	10	13.1
1972	8	13.1
1973	13	13.1
1974	17	13.1
1975	19	13.1
1976	24	13.1
1977	15	13.1
1978	9	13.1
1979	10	13.1
1980	10	11.4
1982	8	11.4
1983	12	11.4
1984	9	11.4
1985	11	11.4
1986	9	11.4
1987	9	11.4
1988	23	11.4

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

First to last qualifying date each year at Zoetvlei
Year	First date	Last date
1908	1908-01-29	1908-10-05
1909	1909-01-01	1909-12-26
1910	1910-01-17	1910-11-21
1912	1912-01-13	1912-06-17
1913	1913-01-06	1913-10-09
1914	1914-01-20	1914-11-24
1915	1915-02-14	1915-03-26
1916	1916-01-04	1916-12-14
1917	1917-02-20	1917-11-28
1918	1918-01-01	1918-10-29
1919	1919-02-19	1919-11-22
1920	1920-01-30	1920-12-18
1921	1921-02-03	1921-11-10
1922	1922-01-10	1922-03-15
1923	1923-01-14	1923-06-01
1924	1924-01-25	1924-12-23
1925	1925-02-14	1925-11-18
1926	1926-03-05	1926-11-17
1927	1927-02-23	1927-07-24
1928	1928-01-08	1928-12-04
1929	1929-02-01	1929-10-09
1930	1930-01-14	1930-10-05
1931	1931-01-13	1931-12-31
1932	1932-01-01	1932-09-17
1933	1933-08-27	1933-11-09
1934	1934-01-02	1934-11-02
1935	1935-02-03	1935-12-15
1936	1936-02-25	1936-10-27
1937	1937-01-19	1937-12-17
1938	1938-01-17	1938-11-08
1940	1940-01-19	1940-09-27
1941	1941-01-30	1941-08-19
1942	1942-01-24	1942-12-21
1943	1943-02-22	1943-12-31
1944	1944-01-14	1944-10-28
1945	1945-01-28	1945-12-30
1946	1946-01-18	1946-12-18
1947	1947-01-13	1947-12-26
1948	1948-01-31	1948-04-20
1949	1949-02-24	1949-12-10
1950	1950-01-04	1950-11-29
1951	1951-01-05	1951-10-01
1952	1952-02-20	1952-12-17
1953	1953-02-19	1953-12-19
1954	1954-01-18	1954-11-19
1955	1955-01-04	1955-12-04
1956	1956-02-05	1956-12-20
1957	1957-01-30	1957-12-09
1958	1958-01-12	1958-12-28
1959	1959-01-24	1959-12-04
1960	1960-01-28	1960-12-28
1961	1961-01-02	1961-12-14
1962	1962-01-09	1962-11-19
1963	1963-01-02	1963-12-08
1964	1964-01-10	1964-12-06
1965	1965-01-30	1965-11-03
1966	1966-04-09	1966-12-21
1967	1967-01-29	1967-11-21
1968	1968-03-12	1968-10-22
1969	1969-01-07	1969-10-21
1970	1970-02-05	1970-12-24
1971	1971-01-10	1971-12-13
1972	1972-01-13	1972-04-16
1973	1973-02-17	1973-12-22
1974	1974-01-19	1974-11-28
1975	1975-01-23	1975-12-22
1976	1976-01-03	1976-12-13
1977	1977-01-28	1977-12-30
1978	1978-01-08	1978-12-13
1979	1979-01-08	1979-11-11
1980	1980-02-26	1980-12-15
1982	1982-03-02	1982-12-04
1983	1983-02-01	1983-12-03
1984	1984-04-03	1984-11-27
1985	1985-01-14	1985-12-18
1986	1986-01-17	1986-11-23
1987	1987-02-12	1987-11-29
1988	1988-01-11	1988-12-24

Every Fixed Threshold

Fixed thresholds at Zoetvlei
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	78	25	1963	23
25 mm (0.98 in): Days with 25 mm or more rain	68	7	1974	6
50 mm (1.97 in): Days with 50 mm or more rain	17	1	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

Data for Zoetvlei 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).

Zoetvlei Threshold Days by Year (SF001183950)

Key Facts for Zoetvlei Thresholds

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

Every Fixed Threshold

Download the Data

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