De Aar Threshold Days by Year (SF001700090)

4 fixed thresholds counted per year at De Aar (SF001700090): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for De Aar Thresholds

De Aar: days with 10 mm (0.39 in) or more of precipitation in 89 years, most in 1890 with 22.
De Aar: days with 25 mm (0.98 in) or more of precipitation in 74 years, most in 1898 with 7.
De Aar: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1920 with 2.
De Aar: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1918 with 1.
4 fixed thresholds have at least one qualifying day at De Aar.

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

89 years with a qualifying day

Days per year at De Aar with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1890.

Days with 10 mm (0.39 in) or more of precipitation per year at De Aar
Year	Days	Decade average
1889	13	13
1890	22	15.1
1891	21	15.1
1892	18	15.1
1893	10	15.1
1894	16	15.1
1895	14	15.1
1896	10	15.1
1897	7	15.1
1898	16	15.1
1899	17	15.1
1900	11	8.7
1901	12	8.7
1902	8	8.7
1903	3	8.7
1904	6	8.7
1905	12	8.7
1914	7	9
1915	5	9
1916	13	9
1917	12	9
1918	11	9
1919	6	9
1920	16	9.4
1921	12	9.4
1922	1	9.4
1925	16	9.4
1926	4	9.4
1927	6	9.4
1928	8	9.4
1929	12	9.4
1930	7	8.4
1931	8	8.4
1932	5	8.4
1933	5	8.4
1934	14	8.4
1935	10	8.4
1936	9	8.4
1937	7	8.4
1938	6	8.4
1939	13	8.4
1940	12	8
1941	10	8
1942	10	8
1943	9	8
1944	4	8
1945	2	8
1946	10	8
1947	7	8
1948	12	8
1949	4	8
1950	12	7.4
1951	3	7.4
1952	7	7.4
1953	5	7.4
1954	7	7.4
1955	7	7.4
1956	5	7.4
1957	9	7.4
1958	9	7.4
1959	10	7.4
1960	6	9
1961	13	9
1962	7	9
1963	13	9
1964	5	9
1965	14	9
1966	7	9
1967	12	9
1968	6	9
1969	7	9
1970	9	11.3
1971	10	11.3
1972	9	11.3
1975	12	11.3
1976	20	11.3
1977	12	11.3
1978	9	11.3
1979	9	11.3
1980	8	11.7
1981	19	11.7
1982	12	11.7
1983	11	11.7
1984	10	11.7
1985	11	11.7
1986	3	11.7
1987	11	11.7
1988	20	11.7
1990	8	8

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

First to last qualifying date each year at De Aar
Year	First date	Last date
1889	1889-02-23	1889-12-21
1890	1890-01-31	1890-12-26
1891	1891-01-20	1891-12-12
1892	1892-01-19	1892-11-26
1893	1893-01-29	1893-11-20
1894	1894-01-20	1894-12-07
1895	1895-01-03	1895-12-28
1896	1896-01-03	1896-12-16
1897	1897-01-03	1897-10-10
1898	1898-01-08	1898-11-24
1899	1899-01-27	1899-12-10
1900	1900-02-24	1900-12-19
1901	1901-02-05	1901-11-02
1902	1902-02-11	1902-11-25
1903	1903-01-08	1903-02-06
1904	1904-01-09	1904-10-25
1905	1905-01-13	1905-12-13
1914	1914-02-07	1914-12-02
1915	1915-02-15	1915-10-27
1916	1916-01-19	1916-11-21
1917	1917-01-25	1917-11-16
1918	1918-01-01	1918-11-23
1919	1919-03-14	1919-11-23
1920	1920-01-29	1920-12-16
1921	1921-02-04	1921-11-08
1922	1922-01-11	1922-01-11
1925	1925-01-30	1925-12-05
1926	1926-03-05	1926-11-18
1927	1927-03-15	1927-11-30
1928	1928-01-04	1928-12-26
1929	1929-01-21	1929-12-30
1930	1930-01-17	1930-11-13
1931	1931-01-11	1931-12-31
1932	1932-02-10	1932-09-17
1933	1933-02-22	1933-12-31
1934	1934-01-03	1934-12-20
1935	1935-02-23	1935-12-15
1936	1936-02-07	1936-11-18
1937	1937-01-20	1937-04-06
1938	1938-02-16	1938-07-06
1939	1939-01-31	1939-11-04
1940	1940-02-15	1940-11-08
1941	1941-01-30	1941-09-28
1942	1942-02-24	1942-11-11
1943	1943-02-02	1943-12-11
1944	1944-01-01	1944-09-18
1945	1945-03-10	1945-07-12
1946	1946-03-18	1946-11-25
1947	1947-03-05	1947-12-11
1948	1948-01-24	1948-10-10
1949	1949-03-05	1949-12-19
1950	1950-01-04	1950-12-07
1951	1951-01-03	1951-05-15
1952	1952-02-05	1952-05-16
1953	1953-02-22	1953-12-19
1954	1954-02-15	1954-12-09
1955	1955-01-26	1955-12-17
1956	1956-02-08	1956-12-06
1957	1957-02-19	1957-10-21
1958	1958-01-17	1958-12-27
1959	1959-01-24	1959-12-06
1960	1960-02-25	1960-08-19
1961	1961-01-02	1961-12-15
1962	1962-02-08	1962-11-24
1963	1963-01-02	1963-12-08
1964	1964-02-11	1964-11-04
1965	1965-01-14	1965-11-21
1966	1966-02-02	1966-12-18
1967	1967-01-29	1967-11-23
1968	1968-03-12	1968-05-26
1969	1969-02-26	1969-11-06
1970	1970-02-05	1970-12-19
1971	1971-01-24	1971-10-14
1972	1972-01-06	1972-04-12
1975	1975-01-22	1975-12-18
1976	1976-01-03	1976-10-04
1977	1977-01-27	1977-11-30
1978	1978-01-09	1978-12-09
1979	1979-01-26	1979-11-18
1980	1980-01-22	1980-08-02
1981	1981-01-25	1981-11-19
1982	1982-02-08	1982-12-05
1983	1983-02-01	1983-12-29
1984	1984-03-01	1984-11-28
1985	1985-01-14	1985-12-19
1986	1986-01-17	1986-11-21
1987	1987-02-08	1987-12-21
1988	1988-02-07	1988-12-28
1990	1990-01-28	1990-12-05

Every Fixed Threshold

Fixed thresholds at De Aar
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	89	22	1890	8
25 mm (0.98 in): Days with 25 mm or more rain	74	7	1898	2
50 mm (1.97 in): Days with 50 mm or more rain	16	2	1920	1
100 mm (3.94 in): Days with 100 mm or more rain	1	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 1889.

Download the Data

Data for De Aar 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).

De Aar Threshold Days by Year (SF001700090)

Key Facts for De Aar Thresholds

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

Every Fixed Threshold

Download the Data

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