Syferfontein Threshold Days by Year

4 fixed thresholds counted per year at Syferfontein (SF003996620): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Syferfontein Thresholds

Syferfontein: days with 10 mm (0.39 in) or more of precipitation in 80 years, most in 1934 with 33.
Syferfontein: days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 1988 with 13.
Syferfontein: days with 50 mm (1.97 in) or more of precipitation in 39 years, most in 1943 with 4.
Syferfontein: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1915 with 1.
4 fixed thresholds have at least one qualifying day at Syferfontein.

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

80 years with a qualifying day

Days per year at Syferfontein with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 33 in 1934.

Days with 10 mm (0.39 in) or more of precipitation per year at Syferfontein
Year	Days	Decade average
1910	14	15.4
1911	10	15.4
1912	20	15.4
1913	17	15.4
1914	11	15.4
1915	17	15.4
1916	12	15.4
1917	19	15.4
1918	27	15.4
1919	7	15.4
1920	16	16.4
1921	20	16.4
1922	10	16.4
1923	15	16.4
1924	18	16.4
1925	17	16.4
1926	15	16.4
1927	13	16.4
1928	17	16.4
1929	23	16.4
1930	15	19.3
1931	16	19.3
1932	17	19.3
1933	11	19.3
1934	33	19.3
1935	20	19.3
1936	21	19.3
1937	17	19.3
1938	15	19.3
1939	28	19.3
1940	17	19.7
1941	9	19.7
1942	23	19.7
1943	22	19.7
1944	29	19.7
1945	16	19.7
1946	17	19.7
1947	26	19.7
1948	20	19.7
1949	18	19.7
1950	26	21.1
1951	19	21.1
1952	17	21.1
1953	20	21.1
1954	15	21.1
1955	26	21.1
1956	25	21.1
1957	23	21.1
1958	23	21.1
1959	17	21.1
1960	24	20.2
1961	21	20.2
1962	21	20.2
1963	16	20.2
1964	16	20.2
1965	11	20.2
1966	24	20.2
1967	27	20.2
1968	23	20.2
1969	19	20.2
1970	19	20
1971	23	20
1972	16	20
1973	16	20
1974	28	20
1975	21	20
1976	31	20
1977	19	20
1978	11	20
1979	16	20
1980	12	17.2
1981	12	17.2
1982	6	17.2
1983	18	17.2
1984	12	17.2
1985	15	17.2
1986	26	17.2
1987	17	17.2
1988	24	17.2
1989	30	17.2

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

First to last qualifying date each year at Syferfontein
Year	First date	Last date
1910	1910-02-09	1910-12-29
1911	1911-01-09	1911-12-06
1912	1912-01-02	1912-12-30
1913	1913-01-26	1913-12-08
1914	1914-01-06	1914-12-18
1915	1915-01-07	1915-12-15
1916	1916-01-05	1916-12-14
1917	1917-01-05	1917-12-30
1918	1918-01-04	1918-12-27
1919	1919-01-02	1919-12-04
1920	1920-01-06	1920-12-24
1921	1921-01-07	1921-12-24
1922	1922-01-11	1922-12-23
1923	1923-01-07	1923-11-20
1924	1924-01-24	1924-12-09
1925	1925-01-09	1925-12-10
1926	1926-01-10	1926-12-22
1927	1927-01-03	1927-12-28
1928	1928-01-05	1928-12-30
1929	1929-01-07	1929-12-12
1930	1930-01-02	1930-12-31
1931	1931-01-01	1931-12-29
1932	1932-01-28	1932-12-26
1933	1933-01-15	1933-12-30
1934	1934-01-01	1934-12-10
1935	1935-01-16	1935-12-17
1936	1936-01-09	1936-12-16
1937	1937-01-04	1937-12-23
1938	1938-01-11	1938-10-30
1939	1939-01-11	1939-12-27
1940	1940-01-03	1940-12-20
1941	1941-01-16	1941-12-22
1942	1942-01-02	1942-12-31
1943	1943-01-05	1943-12-23
1944	1944-01-02	1944-12-09
1945	1945-01-07	1945-12-28
1946	1946-01-07	1946-11-26
1947	1947-01-07	1947-12-26
1948	1948-01-02	1948-11-30
1949	1949-01-20	1949-12-28
1950	1950-01-03	1950-12-31
1951	1951-01-14	1951-12-24
1952	1952-01-01	1952-12-11
1953	1953-01-13	1953-12-19
1954	1954-01-02	1954-12-07
1955	1955-01-14	1955-12-18
1956	1956-01-05	1956-12-22
1957	1957-01-11	1957-12-24
1958	1958-01-01	1958-12-27
1959	1959-01-03	1959-12-24
1960	1960-01-14	1960-12-28
1961	1961-01-18	1961-12-19
1962	1962-01-13	1962-12-22
1963	1963-01-11	1963-12-18
1964	1964-01-17	1964-12-29
1965	1965-01-14	1965-12-13
1966	1966-01-07	1966-12-27
1967	1967-01-01	1967-12-21
1968	1968-01-19	1968-12-20
1969	1969-01-01	1969-11-27
1970	1970-01-16	1970-12-25
1971	1971-01-14	1971-12-21
1972	1972-01-10	1972-12-09
1973	1973-01-01	1973-12-24
1974	1974-01-04	1974-12-28
1975	1975-01-14	1975-12-21
1976	1976-01-04	1976-12-15
1977	1977-01-13	1977-12-31
1978	1978-01-01	1978-12-26
1979	1979-01-18	1979-12-11
1980	1980-01-08	1980-12-26
1981	1981-01-17	1981-11-28
1982	1982-10-09	1982-11-14
1983	1983-01-07	1983-12-24
1984	1984-01-08	1984-12-18
1985	1985-01-15	1985-12-22
1986	1986-01-02	1986-12-09
1987	1987-01-11	1987-12-16
1988	1988-01-05	1988-11-29
1989	1989-01-05	1989-12-27

Every Fixed Threshold

Fixed thresholds at Syferfontein
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	80	33	1934	30
25 mm (0.98 in): Days with 25 mm or more rain	79	13	1988	9
50 mm (1.97 in): Days with 50 mm or more rain	39	4	1943	4
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1915	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.

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Data for Syferfontein 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Syferfontein Threshold Days by Year

Key Facts for Syferfontein Thresholds

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

Every Fixed Threshold

Download the Data

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