De Aar Weather Records (SF001700090)

Record envelope, standing records and threshold days for De Aar (SF001700090), South Africa, with 105 years of record.

Key Facts for De Aar

De Aar (SF001700090) is a weather station in South Africa at -30.65 latitude and 24.02 longitude, 1,247 m (4,091 ft) above sea level.
The station reports from 1888 to 1992, 105 years of record.
286 records set at De Aar still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
De Aar set a daily record precipitation of 32.6 mm (1.3 in) on 17 June 1991.

About the Station

Location: South Africa, -30.65 latitude, 24.02 longitude.
Elevation: 1,247 m (4,091 ft).
Period of record: 1888 to 1992, 105 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at De Aar. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at De Aar, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.2 C (99.0 F)	12.5 C (54.5 F)	n/a	n/a
Feb	35.7 C (96.3 F)	11.0 C (51.8 F)	n/a	n/a
Mar	37.0 C (98.6 F)	10.1 C (50.2 F)	n/a	n/a
Apr	27.4 C (81.3 F)	0.5 C (32.9 F)	n/a	n/a
May	29.8 C (85.6 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	25.6 C (78.1 F)	0.0 C (32.0 F)	n/a	n/a
Jul	20.4 C (68.7 F)	-3.1 C (26.4 F)	n/a	n/a
Aug	24.6 C (76.3 F)	-3.2 C (26.2 F)	n/a	n/a
Sep	27.7 C (81.9 F)	-2.7 C (27.1 F)	n/a	n/a
Oct	31.7 C (89.1 F)	4.1 C (39.4 F)	n/a	n/a
Nov	32.6 C (90.7 F)	7.0 C (44.6 F)	n/a	n/a
Dec	35.6 C (96.1 F)	12.2 C (54.0 F)	n/a	n/a

Which Years Hold Standing Records

286 standing records

286 records at De Aar still stand. 1985 holds the most, with 38.

All-Time Record Progression

1 new records

1 all-time records were set at De Aar between 11 February 1989 and 11 February 1989. Each dot is a new record.

Wettest Day of Each Month

Feb: 114.8 mm (4.5 in)

The wettest day on record for each calendar month at De Aar. The most was 114.8 mm (4.5 in) on 11 February 1989.

Record daily precipitation for each month at De Aar
Month	Record daily precipitation (mm)	Date
Jan	79.5 mm (3.1 in)	26 January 1963
Feb	114.8 mm (4.5 in)	11 February 1989
Mar	104.9 mm (4.1 in)	15 March 1918
Apr	52.8 mm (2.1 in)	9 April 1896
May	34.8 mm (1.4 in)	16 May 1936
Jun	44.5 mm (1.8 in)	7 June 1991
Jul	38.0 mm (1.5 in)	17 July 1965
Aug	43.9 mm (1.7 in)	14 August 1939
Sep	93.0 mm (3.7 in)	16 September 1901
Oct	38.4 mm (1.5 in)	10 October 1934
Nov	77.2 mm (3.0 in)	24 November 1898
Dec	48.9 mm (1.9 in)	19 December 1985

Period of Record Coverage

1982 to 1992

10 years of record at De Aar, 1982 to 1992. 10 years have data for under 90 percent of days and are left out of rankings: 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989 and others.

Latest Records

Latest records at De Aar
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 June 1991	De Aar, ZA	daily rain	32.6 mm (1.3 in)	15.8 mm (0.6 in)	52 years	51 of 100 (Notable)
7 June 1991	De Aar, ZA	monthly rain	44.5 mm (1.8 in)	9.5 mm (0.37 in)	33 years	45 of 100 (Notable)
12 March 1991	De Aar, ZA	daily rain	32.0 mm (1.3 in)	11.9 mm (0.5 in)	66 years	42 of 100 (Notable)
25 January 1991	De Aar, ZA	daily rain	33.1 mm (1.3 in)	11.0 mm (0.4 in)	9 years	22 of 100 (Routine)
15 January 1991	De Aar, ZA	daily rain	9.1 mm (0.36 in)	0.5 mm (0.02 in)	94 years	20 of 100 (Routine)
5 December 1990	De Aar, ZA	daily rain	34.7 mm (1.4 in)	4.8 mm (0.19 in)	8 years	18 of 100 (Routine)
20 June 1990	De Aar, ZA	daily rain	19.0 mm (0.7 in)	10.9 mm (0.4 in)	85 years	20 of 100 (Routine)
21 April 1990	De Aar, ZA	daily rain	22.5 mm (0.9 in)	8.5 mm (0.33 in)	68 years	20 of 100 (Routine)
30 May 1989	De Aar, ZA	daily rain	29.1 mm (1.1 in)	8.5 mm (0.33 in)	84 years	47 of 100 (Notable)
29 March 1989	De Aar, ZA	daily rain	25.0 mm (1.0 in)	1.1 mm (0.04 in)	84 years	36 of 100 (Notable)
11 February 1989	De Aar, ZA	all-time rain	114.8 mm (4.5 in)	9.9 mm (0.39 in)	70 years	59 of 100 (Notable)
5 January 1989	De Aar, ZA	daily rain	40.0 mm (1.6 in)	20.9 mm (0.8 in)	13 years	33 of 100 (Routine)
28 December 1988	De Aar, ZA	daily rain	23.8 mm (0.9 in)	7.8 mm (0.31 in)	92 years	20 of 100 (Routine)
24 December 1988	De Aar, ZA	daily rain	4.4 mm (0.17 in)	0.8 mm (0.03 in)	72 years	20 of 100 (Routine)
7 November 1988	De Aar, ZA	daily rain	11.2 mm (0.4 in)	1.0 mm (0.04 in)	69 years	20 of 100 (Routine)
13 September 1988	De Aar, ZA	daily rain	31.0 mm (1.2 in)	13.7 mm (0.5 in)	83 years	47 of 100 (Notable)
2 September 1988	De Aar, ZA	daily rain	21.1 mm (0.8 in)	4.6 mm (0.18 in)	59 years	20 of 100 (Routine)
26 June 1988	De Aar, ZA	daily rain	33.3 mm (1.3 in)	23.1 mm (0.9 in)	88 years	76 of 100 (Major)
17 April 1988	De Aar, ZA	daily rain	23.4 mm (0.9 in)	8.2 mm (0.32 in)	40 years	20 of 100 (Routine)
14 April 1988	De Aar, ZA	daily rain	22.2 mm (0.9 in)	4.5 mm (0.18 in)	11 years	18 of 100 (Routine)

Extremes by Year

1888 to 1992

Yearly extremes at De Aar: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1990	34.6 C (94.3 F)	10
Coldest night (TNn)	-3.2 C (26.2 F)	1988	0.0 C (32.0 F)	13
Wettest day (Rx1day)	114.8 mm (4.5 in)	1989	36.3 mm (1.4 in)	98
Wettest five days (Rx5day)	145.3 mm (5.7 in)	1918	55.1 mm (2.2 in)	98
Longest dry spell (CDD)	154 days	1895	68 days	98

Hottest day (TXx)

The hottest day of the year at De Aar, 1888 to 1992. The record is 37.2 C (99.0 F) in 1990, marked on the chart; the median year is 34.6 C (94.3 F).

Hottest day (TXx) at De Aar by year
Year	Hottest day (TXx)
1888	n/a
1889	n/a
1890	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	27.7 C (81.9 F)
1983	34.4 C (93.9 F)
1984	37.0 C (98.6 F)
1985	34.8 C (94.6 F)
1986	35.7 C (96.3 F)
1987	34.4 C (93.9 F)
1988	30.1 C (86.2 F)
1989	35.6 C (96.1 F)
1990	37.2 C (99.0 F)
1991	n/a
1992	30.6 C (87.1 F)

Coldest night (TNn)

The coldest night of the year at De Aar, 1888 to 1992. The record is -3.2 C (26.2 F) in 1988, marked on the chart; the median year is 0.0 C (32.0 F).

Coldest night (TNn) at De Aar by year
Year	Coldest night (TNn)
1888	n/a
1889	n/a
1890	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	20.0 C (68.0 F)
1980	0.0 C (32.0 F)
1981	-3.0 C (26.6 F)
1982	0.5 C (32.9 F)
1983	-2.9 C (26.8 F)
1984	-3.1 C (26.4 F)
1985	2.1 C (35.8 F)
1986	3.3 C (37.9 F)
1987	5.5 C (41.9 F)
1988	-3.2 C (26.2 F)
1989	-2.7 C (27.1 F)
1990	16.4 C (61.5 F)
1991	n/a
1992	-2.6 C (27.3 F)

Wettest day (Rx1day)

The wettest day of the year at De Aar, 1888 to 1992. The record is 114.8 mm (4.5 in) in 1989, marked on the chart; the median year is 36.3 mm (1.4 in).

Wettest day (Rx1day) at De Aar by year
Year	Wettest day (Rx1day)
1888	14.5 mm (0.6 in)
1889	51.1 mm (2.0 in)
1890	35.3 mm (1.4 in)
1891	55.1 mm (2.2 in)
1892	40.1 mm (1.6 in)
1893	31.2 mm (1.2 in)
1894	33.8 mm (1.3 in)
1895	48.0 mm (1.9 in)
1896	52.8 mm (2.1 in)
1897	19.1 mm (0.8 in)
1898	77.2 mm (3.0 in)
1899	49.3 mm (1.9 in)
1900	36.8 mm (1.4 in)
1901	93.0 mm (3.7 in)
1902	29.0 mm (1.1 in)
1903	31.0 mm (1.2 in)
1904	23.4 mm (0.9 in)
1905	25.9 mm (1.0 in)
1906	37.1 mm (1.5 in)
1913	24.1 mm (0.9 in)
1914	26.9 mm (1.1 in)
1915	29.7 mm (1.2 in)
1916	22.4 mm (0.9 in)
1917	44.7 mm (1.8 in)
1918	104.9 mm (4.1 in)
1919	17.8 mm (0.7 in)
1920	68.6 mm (2.7 in)
1921	51.3 mm (2.0 in)
1922	30.5 mm (1.2 in)
1923	18.3 mm (0.7 in)
1924	22.9 mm (0.9 in)
1925	44.5 mm (1.8 in)
1926	31.2 mm (1.2 in)
1927	27.4 mm (1.1 in)
1928	36.8 mm (1.4 in)
1929	40.6 mm (1.6 in)
1930	26.7 mm (1.1 in)
1931	30.5 mm (1.2 in)
1932	35.8 mm (1.4 in)
1933	14.7 mm (0.6 in)
1934	63.5 mm (2.5 in)
1935	35.6 mm (1.4 in)
1936	38.9 mm (1.5 in)
1937	42.7 mm (1.7 in)
1938	71.6 mm (2.8 in)
1939	43.9 mm (1.7 in)
1940	46.0 mm (1.8 in)
1941	27.9 mm (1.1 in)
1942	30.5 mm (1.2 in)
1943	22.9 mm (0.9 in)
1944	17.0 mm (0.7 in)
1945	14.0 mm (0.6 in)
1946	32.5 mm (1.3 in)
1947	33.0 mm (1.3 in)
1948	45.7 mm (1.8 in)
1949	14.2 mm (0.6 in)
1950	48.3 mm (1.9 in)
1951	10.9 mm (0.4 in)
1952	38.1 mm (1.5 in)
1953	51.0 mm (2.0 in)
1954	20.0 mm (0.8 in)
1955	58.0 mm (2.3 in)
1956	23.5 mm (0.9 in)
1957	43.0 mm (1.7 in)
1958	34.0 mm (1.3 in)
1959	49.0 mm (1.9 in)
1960	26.0 mm (1.0 in)
1961	37.0 mm (1.5 in)
1962	30.0 mm (1.2 in)
1963	79.5 mm (3.1 in)
1964	17.5 mm (0.7 in)
1965	38.0 mm (1.5 in)
1966	31.0 mm (1.2 in)
1967	38.0 mm (1.5 in)
1968	32.0 mm (1.3 in)
1969	40.0 mm (1.6 in)
1970	46.5 mm (1.8 in)
1971	33.0 mm (1.3 in)
1972	20.8 mm (0.8 in)
1973	60.1 mm (2.4 in)
1974	43.0 mm (1.7 in)
1975	47.6 mm (1.9 in)
1976	81.2 mm (3.2 in)
1977	39.3 mm (1.5 in)
1978	42.0 mm (1.7 in)
1979	26.7 mm (1.1 in)
1980	32.6 mm (1.3 in)
1981	36.9 mm (1.5 in)
1982	29.9 mm (1.2 in)
1983	66.0 mm (2.6 in)
1984	40.2 mm (1.6 in)
1985	48.9 mm (1.9 in)
1986	19.1 mm (0.8 in)
1987	34.4 mm (1.4 in)
1988	80.1 mm (3.2 in)
1989	114.8 mm (4.5 in)
1990	34.7 mm (1.4 in)
1991	44.5 mm (1.8 in)
1992	n/a

Wettest five days (Rx5day)

The wettest five days of the year at De Aar, 1888 to 1992. The record is 145.3 mm (5.7 in) in 1918, marked on the chart; the median year is 55.1 mm (2.2 in).

Wettest five days (Rx5day) at De Aar by year
Year	Wettest five days (Rx5day)
1888	14.5 mm (0.6 in)
1889	79.1 mm (3.1 in)
1890	64.3 mm (2.5 in)
1891	66.0 mm (2.6 in)
1892	59.7 mm (2.4 in)
1893	37.1 mm (1.5 in)
1894	57.4 mm (2.3 in)
1895	53.6 mm (2.1 in)
1896	111.3 mm (4.4 in)
1897	36.9 mm (1.5 in)
1898	112.8 mm (4.4 in)
1899	100.7 mm (4.0 in)
1900	52.6 mm (2.1 in)
1901	100.6 mm (4.0 in)
1902	39.9 mm (1.6 in)
1903	43.7 mm (1.7 in)
1904	26.7 mm (1.1 in)
1905	46.5 mm (1.8 in)
1906	38.9 mm (1.5 in)
1913	38.3 mm (1.5 in)
1914	55.6 mm (2.2 in)
1915	52.1 mm (2.1 in)
1916	33.5 mm (1.3 in)
1917	91.9 mm (3.6 in)
1918	145.3 mm (5.7 in)
1919	26.5 mm (1.0 in)
1920	87.9 mm (3.5 in)
1921	59.4 mm (2.3 in)
1922	33.0 mm (1.3 in)
1923	31.8 mm (1.3 in)
1924	23.9 mm (0.9 in)
1925	94.3 mm (3.7 in)
1926	31.2 mm (1.2 in)
1927	39.8 mm (1.6 in)
1928	41.4 mm (1.6 in)
1929	40.6 mm (1.6 in)
1930	27.4 mm (1.1 in)
1931	72.6 mm (2.9 in)
1932	72.6 mm (2.9 in)
1933	22.1 mm (0.9 in)
1934	71.1 mm (2.8 in)
1935	38.7 mm (1.5 in)
1936	57.7 mm (2.3 in)
1937	60.7 mm (2.4 in)
1938	137.1 mm (5.4 in)
1939	63.5 mm (2.5 in)
1940	109.3 mm (4.3 in)
1941	62.3 mm (2.5 in)
1942	37.6 mm (1.5 in)
1943	38.8 mm (1.5 in)
1944	24.9 mm (1.0 in)
1945	20.6 mm (0.8 in)
1946	56.6 mm (2.2 in)
1947	33.0 mm (1.3 in)
1948	73.1 mm (2.9 in)
1949	23.6 mm (0.9 in)
1950	53.1 mm (2.1 in)
1951	19.3 mm (0.8 in)
1952	54.6 mm (2.1 in)
1953	58.5 mm (2.3 in)
1954	29.1 mm (1.1 in)
1955	64.0 mm (2.5 in)
1956	35.5 mm (1.4 in)
1957	62.5 mm (2.5 in)
1958	42.0 mm (1.7 in)
1959	67.5 mm (2.7 in)
1960	52.5 mm (2.1 in)
1961	67.0 mm (2.6 in)
1962	59.0 mm (2.3 in)
1963	88.0 mm (3.5 in)
1964	26.0 mm (1.0 in)
1965	63.5 mm (2.5 in)
1966	40.7 mm (1.6 in)
1967	63.9 mm (2.5 in)
1968	36.5 mm (1.4 in)
1969	75.5 mm (3.0 in)
1970	55.5 mm (2.2 in)
1971	38.0 mm (1.5 in)
1972	43.2 mm (1.7 in)
1973	71.1 mm (2.8 in)
1974	57.4 mm (2.3 in)
1975	89.6 mm (3.5 in)
1976	105.3 mm (4.1 in)
1977	76.4 mm (3.0 in)
1978	45.6 mm (1.8 in)
1979	27.0 mm (1.1 in)
1980	55.9 mm (2.2 in)
1981	61.7 mm (2.4 in)
1982	39.3 mm (1.5 in)
1983	67.0 mm (2.6 in)
1984	40.2 mm (1.6 in)
1985	51.0 mm (2.0 in)
1986	37.6 mm (1.5 in)
1987	59.5 mm (2.3 in)
1988	145.0 mm (5.7 in)
1989	144.5 mm (5.7 in)
1990	34.7 mm (1.4 in)
1991	115.0 mm (4.5 in)
1992	n/a

Longest dry spell (CDD)

The longest dry spell of the year at De Aar, 1888 to 1992. The record is 154 days in 1895, marked on the chart; the median year is 68 days.

Longest dry spell (CDD) at De Aar by year
Year	Longest dry spell (CDD)
1888	56 days
1889	79 days
1890	95 days
1891	68 days
1892	46 days
1893	45 days
1894	65 days
1895	154 days
1896	121 days
1897	99 days
1898	66 days
1899	52 days
1900	64 days
1901	79 days
1902	87 days
1903	106 days
1904	95 days
1905	82 days
1906	9 days
1913	45 days
1914	51 days
1915	68 days
1916	66 days
1917	33 days
1918	38 days
1919	118 days
1920	82 days
1921	87 days
1922	92 days
1923	102 days
1924	56 days
1925	40 days
1926	97 days
1927	106 days
1928	119 days
1929	49 days
1930	65 days
1931	78 days
1932	109 days
1933	64 days
1934	91 days
1935	47 days
1936	74 days
1937	82 days
1938	89 days
1939	49 days
1940	62 days
1941	51 days
1942	102 days
1943	69 days
1944	81 days
1945	82 days
1946	69 days
1947	100 days
1948	92 days
1949	117 days
1950	36 days
1951	65 days
1952	59 days
1953	63 days
1954	120 days
1955	88 days
1956	116 days
1957	77 days
1958	104 days
1959	92 days
1960	134 days
1961	65 days
1962	84 days
1963	68 days
1964	60 days
1965	53 days
1966	103 days
1967	51 days
1968	62 days
1969	54 days
1970	42 days
1971	30 days
1972	79 days
1973	39 days
1974	34 days
1975	107 days
1976	65 days
1977	92 days
1978	68 days
1979	34 days
1980	72 days
1981	45 days
1982	50 days
1983	47 days
1984	105 days
1985	70 days
1986	67 days
1987	49 days
1988	46 days
1989	37 days
1990	58 days
1991	72 days
1992	n/a

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

89 years, 1889 to 1990

A day with at least 35.8 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 100.2 mm (3.9 in) of rain is expected about once in 100 years.

Rainfall return levels at De Aar: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	35.8 mm (1.4 in)
5 years	51.1 mm (2.0 in)
10 years	62.0 mm (2.4 in)
25 years	76.6 mm (3.0 in)
50 years	88.2 mm (3.5 in)
100 years	100.2 mm (3.9 in)	Longer than the 89 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 89 years of values from 1889 to 1990.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 104.9 mm (4.1 in) in 1918; 93.0 mm (3.7 in) in 1901; 81.2 mm (3.2 in) in 1976.

Download the Data

Data for De Aar standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

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