Slangfontein Threshold Days by Year (SF002300730)

3 fixed thresholds counted per year at Slangfontein (SF002300730): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Slangfontein Thresholds

Slangfontein: days with 10 mm (0.39 in) or more of precipitation in 71 years, most in 1988 with 32.
Slangfontein: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1976 with 15.
Slangfontein: days with 50 mm (1.97 in) or more of precipitation in 37 years, most in 1974 with 5.
3 fixed thresholds have at least one qualifying day at Slangfontein.

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

71 years with a qualifying day

Days per year at Slangfontein with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1988.

Days with 10 mm (0.39 in) or more of precipitation per year at Slangfontein
Year	Days	Decade average
1923	2	12.2
1924	13	12.2
1925	21	12.2
1927	10	12.2
1928	14	12.2
1929	13	12.2
1930	11	13.1
1931	21	13.1
1932	7	13.1
1933	8	13.1
1935	15	13.1
1936	17	13.1
1937	11	13.1
1938	15	13.1
1939	13	13.1
1940	14	15.8
1941	20	15.8
1942	27	15.8
1943	25	15.8
1944	11	15.8
1945	8	15.8
1946	16	15.8
1947	11	15.8
1948	15	15.8
1949	11	15.8
1950	20	17.3
1953	14	17.3
1954	13	17.3
1955	24	17.3
1956	16	17.3
1957	21	17.3
1958	16	17.3
1959	14	17.3
1960	18	14.9
1961	21	14.9
1962	9	14.9
1963	21	14.9
1964	13	14.9
1965	9	14.9
1966	12	14.9
1967	17	14.9
1968	14	14.9
1969	15	14.9
1970	11	18.8
1971	14	18.8
1972	19	18.8
1973	13	18.8
1974	31	18.8
1975	22	18.8
1976	28	18.8
1977	21	18.8
1978	15	18.8
1979	14	18.8
1980	9	15.2
1981	21	15.2
1982	16	15.2
1983	16	15.2
1984	11	15.2
1985	11	15.2
1986	12	15.2
1987	11	15.2
1988	32	15.2
1989	13	15.2
1990	11	15.1
1991	29	15.1
1992	7	15.1
1993	13	15.1
1994	16	15.1
1995	13	15.1
1996	18	15.1
1997	14	15.1

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

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

Every Fixed Threshold

Fixed thresholds at Slangfontein
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	71	32	1988	14
25 mm (0.98 in): Days with 25 mm or more rain	70	15	1976	1
50 mm (1.97 in): Days with 50 mm or more rain	37	5	1974	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1923.

Download the Data

Data for Slangfontein 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).

Slangfontein Threshold Days by Year (SF002300730)

Key Facts for Slangfontein Thresholds

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

Every Fixed Threshold

Download the Data

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