Tweefontein Threshold Days by Year (SF002885280)

4 fixed thresholds counted per year at Tweefontein (SF002885280): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tweefontein Thresholds

Tweefontein: days with 10 mm (0.39 in) or more of precipitation in 77 years, most in 1974 with 29.
Tweefontein: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1974 with 12.
Tweefontein: days with 50 mm (1.97 in) or more of precipitation in 26 years, most in 1988 with 4.
Tweefontein: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1955 with 1.
4 fixed thresholds have at least one qualifying day at Tweefontein.

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

77 years with a qualifying day

Days per year at Tweefontein 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 Tweefontein
Year	Days	Decade average
1920	14	11.8
1921	13	11.8
1922	5	11.8
1923	9	11.8
1924	14	11.8
1925	19	11.8
1926	4	11.8
1927	11	11.8
1928	13	11.8
1929	16	11.8
1930	6	9.6
1931	11	9.6
1932	4	9.6
1933	9	9.6
1934	12	9.6
1935	13	9.6
1936	9	9.6
1937	11	9.6
1938	9	9.6
1939	12	9.6
1940	9	11
1941	15	11
1942	15	11
1943	18	11
1944	9	11
1946	9	11
1947	8	11
1948	10	11
1949	6	11
1950	15	10.6
1951	5	10.6
1952	2	10.6
1953	17	10.6
1954	9	10.6
1955	14	10.6
1956	13	10.6
1957	10	10.6
1958	12	10.6
1959	9	10.6
1960	12	11.1
1961	16	11.1
1962	11	11.1
1963	20	11.1
1964	8	11.1
1965	7	11.1
1966	7	11.1
1967	15	11.1
1968	5	11.1
1969	10	11.1
1970	13	14.4
1971	12	14.4
1972	11	14.4
1973	7	14.4
1974	29	14.4
1975	18	14.4
1976	25	14.4
1977	11	14.4
1978	7	14.4
1979	11	14.4
1980	11	11.9
1981	11	11.9
1982	8	11.9
1983	9	11.9
1984	12	11.9
1985	14	11.9
1986	8	11.9
1987	11	11.9
1988	26	11.9
1989	9	11.9
1990	12	11.6
1991	18	11.6
1992	6	11.6
1993	14	11.6
1994	10	11.6
1995	12	11.6
1996	9	11.6
1997	12	11.6

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

First to last qualifying date each year at Tweefontein
Year	First date	Last date
1920	1920-01-29	1920-03-23
1921	1921-02-02	1921-12-09
1922	1922-01-11	1922-12-17
1923	1923-01-24	1923-11-22
1924	1924-01-25	1924-12-17
1925	1925-01-20	1925-11-23
1926	1926-04-09	1926-12-17
1927	1927-02-16	1927-12-28
1928	1928-01-05	1928-10-16
1929	1929-01-18	1929-12-19
1930	1930-01-03	1930-12-26
1931	1931-01-12	1931-11-06
1932	1932-02-26	1932-12-15
1933	1933-01-31	1933-12-31
1934	1934-01-11	1934-12-25
1935	1935-02-05	1935-12-10
1936	1936-01-11	1936-11-18
1937	1937-01-19	1937-12-23
1938	1938-01-28	1938-12-26
1939	1939-01-17	1939-11-05
1940	1940-01-03	1940-12-01
1941	1941-01-03	1941-10-26
1942	1942-02-13	1942-12-21
1943	1943-02-03	1943-12-24
1944	1944-01-07	1944-10-22
1946	1946-01-30	1946-12-15
1947	1947-02-09	1947-12-30
1948	1948-01-23	1948-10-19
1949	1949-01-29	1949-12-07
1950	1950-02-23	1950-12-28
1951	1951-02-22	1951-05-14
1952	1952-10-16	1952-12-14
1953	1953-01-31	1953-12-19
1954	1954-02-08	1954-09-29
1955	1955-01-20	1955-12-18
1956	1956-01-17	1956-12-06
1957	1957-02-19	1957-12-30
1958	1958-01-01	1958-12-31
1959	1959-02-12	1959-12-14
1960	1960-01-30	1960-12-29
1961	1961-01-02	1961-11-26
1962	1962-02-01	1962-12-25
1963	1963-01-05	1963-12-03
1964	1964-02-11	1964-12-02
1965	1965-01-16	1965-11-26
1966	1966-01-18	1966-06-06
1967	1967-01-03	1967-11-15
1968	1968-04-06	1968-12-01
1969	1969-02-24	1969-11-07
1970	1970-01-21	1970-12-24
1971	1971-01-08	1971-12-01
1972	1972-01-07	1972-11-22
1973	1973-01-04	1973-12-02
1974	1974-01-05	1974-12-17
1975	1975-01-22	1975-12-27
1976	1976-01-09	1976-12-23
1977	1977-01-11	1977-12-19
1978	1978-01-09	1978-12-12
1979	1979-02-20	1979-12-13
1980	1980-02-02	1980-12-12
1981	1981-01-24	1981-12-10
1982	1982-01-23	1982-12-04
1983	1983-01-31	1983-12-27
1984	1984-02-03	1984-11-27
1985	1985-01-21	1985-12-17
1986	1986-01-02	1986-11-04
1987	1987-02-04	1987-11-30
1988	1988-02-14	1988-12-31
1989	1989-01-13	1989-09-11
1990	1990-02-04	1990-12-27
1991	1991-01-06	1991-12-06
1992	1992-01-03	1992-12-25
1993	1993-02-09	1993-12-28
1994	1994-01-06	1994-02-28
1995	1995-01-12	1995-12-04
1996	1996-01-15	1996-12-28
1997	1997-01-06	1997-05-24

Every Fixed Threshold

Fixed thresholds at Tweefontein
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	77	29	1974	12
25 mm (0.98 in): Days with 25 mm or more rain	70	12	1974	2
50 mm (1.97 in): Days with 50 mm or more rain	26	4	1988	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

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Data for Tweefontein 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).

Tweefontein Threshold Days by Year (SF002885280)

Key Facts for Tweefontein Thresholds

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

Every Fixed Threshold

Download the Data

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