Derdekraal Threshold Days by Year (SF006751170)

4 fixed thresholds counted per year at Derdekraal (SF006751170): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Derdekraal Thresholds

Derdekraal: days with 10 mm (0.39 in) or more of precipitation in 63 years, most in 1939 with 33.
Derdekraal: days with 25 mm (0.98 in) or more of precipitation in 62 years, most in 1980 with 14.
Derdekraal: days with 50 mm (1.97 in) or more of precipitation in 34 years, most in 1939 with 4.
Derdekraal: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1931 with 1.
4 fixed thresholds have at least one qualifying day at Derdekraal.

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

63 years with a qualifying day

Days per year at Derdekraal with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 33 in 1939.

Days with 10 mm (0.39 in) or more of precipitation per year at Derdekraal
Year	Days	Decade average
1920	9	16.2
1921	18	16.2
1922	17	16.2
1923	19	16.2
1924	18	16.2
1925	21	16.2
1926	10	16.2
1927	10	16.2
1928	22	16.2
1929	18	16.2
1931	18	20.1
1932	15	20.1
1933	14	20.1
1934	19	20.1
1935	16	20.1
1936	25	20.1
1937	25	20.1
1938	16	20.1
1939	33	20.1
1940	30	20
1941	20	20
1942	17	20
1943	26	20
1944	23	20
1945	5	20
1946	16	20
1947	18	20
1948	24	20
1949	21	20
1950	17	16.6
1951	22	16.6
1952	14	16.6
1953	13	16.6
1954	17	16.6
1955	19	16.6
1956	19	16.6
1957	13	16.6
1958	14	16.6
1959	18	16.6
1960	20	16.6
1961	24	16.6
1962	17	16.6
1963	12	16.6
1964	15	16.6
1965	8	16.6
1966	11	16.6
1967	24	16.6
1968	16	16.6
1969	19	16.6
1970	17	22.1
1971	22	22.1
1972	25	22.1
1973	17	22.1
1974	20	22.1
1975	26	22.1
1976	22	22.1
1977	21	22.1
1978	27	22.1
1979	24	22.1
1980	28	21
1981	29	21
1982	14	21
1983	13	21

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

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

Every Fixed Threshold

Fixed thresholds at Derdekraal
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	63	33	1939	13
25 mm (0.98 in): Days with 25 mm or more rain	62	14	1980	6
50 mm (1.97 in): Days with 50 mm or more rain	34	4	1939	2
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1931	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.

Download the Data

Data for Derdekraal 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).

Derdekraal Threshold Days by Year (SF006751170)

Key Facts for Derdekraal Thresholds

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

Every Fixed Threshold

Download the Data

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