Derdekraal Weather Records (SF006751170)

Record envelope, standing records and threshold days for Derdekraal (SF006751170), South Africa, with 65 years of record.

Key Facts for Derdekraal

Derdekraal (SF006751170) is a weather station in South Africa at -23.95 latitude and 28.08 longitude, 1,294 m (4,245 ft) above sea level.
The station reports from 1919 to 1983, 65 years of record.
0 records set at Derdekraal still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Derdekraal set a daily record precipitation of 4.0 mm (0.16 in) on 18 June 1983.

About the Station

Location: South Africa, -23.95 latitude, 28.08 longitude.
Elevation: 1,294 m (4,245 ft).
Period of record: 1919 to 1983, 65 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 Derdekraal. 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 Derdekraal, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Derdekraal still stand.

Wettest Day of Each Month

Jan: 124.5 mm (4.9 in)

The wettest day on record for each calendar month at Derdekraal. The most was 124.5 mm (4.9 in) on 4 January 1937.

Record daily precipitation for each month at Derdekraal
Month	Record daily precipitation (mm)	Date
Jan	124.5 mm (4.9 in)	4 January 1937
Feb	120.0 mm (4.7 in)	19 February 1972
Mar	73.7 mm (2.9 in)	30 March 1931
Apr	70.0 mm (2.8 in)	6 April 1979
May	38.1 mm (1.5 in)	3 May 1925
Jun	41.0 mm (1.6 in)	13 June 1963
Jul	48.3 mm (1.9 in)	11 July 1926
Aug	35.6 mm (1.4 in)	8 August 1942
Sep	85.0 mm (3.3 in)	27 September 1980
Oct	67.6 mm (2.7 in)	28 October 1920
Nov	78.0 mm (3.1 in)	30 November 1958
Dec	100.0 mm (3.9 in)	29 December 1955

Latest Records

Latest records at Derdekraal
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 June 1983	Derdekraal, ZA	daily rain	4.0 mm (0.16 in)	1.7 mm (0.07 in)	48 years	20 of 100 (Routine)
17 June 1983	Derdekraal, ZA	daily rain	7.0 mm (0.28 in)	7.0 mm (0.28 in)	62 years	20 of 100 (Routine)
20 March 1983	Derdekraal, ZA	daily rain	40.0 mm (1.6 in)	20.0 mm (0.8 in)	16 years	25 of 100 (Routine)
4 March 1983	Derdekraal, ZA	daily rain	12.0 mm (0.5 in)	0.5 mm (0.02 in)	10 years	9 of 100 (Routine)
17 October 1982	Derdekraal, ZA	daily rain	37.0 mm (1.5 in)	18.0 mm (0.7 in)	17 years	28 of 100 (Routine)
18 March 1982	Derdekraal, ZA	daily rain	12.0 mm (0.5 in)	1.3 mm (0.05 in)	40 years	19 of 100 (Routine)
30 December 1981	Derdekraal, ZA	daily rain	45.0 mm (1.8 in)	13.0 mm (0.5 in)	20 years	21 of 100 (Routine)
26 November 1981	Derdekraal, ZA	daily rain	42.0 mm (1.7 in)	14.0 mm (0.6 in)	16 years	21 of 100 (Routine)
19 November 1981	Derdekraal, ZA	daily rain	45.0 mm (1.8 in)	13.0 mm (0.5 in)	2 years	16 of 100 (Routine)
19 August 1981	Derdekraal, ZA	daily rain	14.0 mm (0.6 in)	14.0 mm (0.6 in)	60 years	20 of 100 (Routine)
27 April 1981	Derdekraal, ZA	daily rain	24.0 mm (0.9 in)	13.8 mm (0.5 in)	38 years	20 of 100 (Routine)
8 January 1981	Derdekraal, ZA	daily rain	29.0 mm (1.1 in)	16.0 mm (0.6 in)	20 years	22 of 100 (Routine)
16 December 1980	Derdekraal, ZA	daily rain	36.0 mm (1.4 in)	11.9 mm (0.5 in)	61 years	32 of 100 (Routine)
29 November 1980	Derdekraal, ZA	daily rain	60.0 mm (2.4 in)	6.0 mm (0.24 in)	12 years	13 of 100 (Routine)
17 November 1980	Derdekraal, ZA	daily rain	18.0 mm (0.7 in)	6.1 mm (0.24 in)	31 years	20 of 100 (Routine)
12 November 1980	Derdekraal, ZA	daily rain	29.0 mm (1.1 in)	15.3 mm (0.6 in)	46 years	31 of 100 (Routine)
1 November 1980	Derdekraal, ZA	daily rain	50.0 mm (2.0 in)	34.8 mm (1.4 in)	61 years	52 of 100 (Notable)
27 September 1980	Derdekraal, ZA	monthly rain	85.0 mm (3.3 in)	42.8 mm (1.7 in)	51 years	71 of 100 (Major)
7 September 1980	Derdekraal, ZA	daily rain	35.0 mm (1.4 in)	31.7 mm (1.2 in)	40 years	58 of 100 (Notable)
10 April 1980	Derdekraal, ZA	daily rain	36.0 mm (1.4 in)	7.0 mm (0.28 in)	27 years	19 of 100 (Routine)

Extremes by Year

1919 to 1983

Yearly extremes at Derdekraal: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	124.5 mm (4.9 in)	1937	54.0 mm (2.1 in)	65
Wettest five days (Rx5day)	201.0 mm (7.9 in)	1925	79.0 mm (3.1 in)	65
Longest dry spell (CDD)	259 days	1966	121 days	65

Wettest day (Rx1day)

The wettest day of the year at Derdekraal, 1919 to 1983. The record is 124.5 mm (4.9 in) in 1937, marked on the chart; the median year is 54.0 mm (2.1 in).

Wettest day (Rx1day) at Derdekraal by year
Year	Wettest day (Rx1day)
1919	35.1 mm (1.4 in)
1920	67.6 mm (2.7 in)
1921	47.2 mm (1.9 in)
1922	57.4 mm (2.3 in)
1923	70.6 mm (2.8 in)
1924	41.1 mm (1.6 in)
1925	69.3 mm (2.7 in)
1926	48.3 mm (1.9 in)
1927	31.0 mm (1.2 in)
1928	33.0 mm (1.3 in)
1929	58.4 mm (2.3 in)
1930	48.3 mm (1.9 in)
1931	113.0 mm (4.4 in)
1932	29.0 mm (1.1 in)
1933	43.2 mm (1.7 in)
1934	56.4 mm (2.2 in)
1935	62.2 mm (2.4 in)
1936	65.3 mm (2.6 in)
1937	124.5 mm (4.9 in)
1938	49.8 mm (2.0 in)
1939	74.9 mm (2.9 in)
1940	96.5 mm (3.8 in)
1941	39.1 mm (1.5 in)
1942	59.7 mm (2.4 in)
1943	57.2 mm (2.3 in)
1944	57.2 mm (2.3 in)
1945	23.4 mm (0.9 in)
1946	41.9 mm (1.6 in)
1947	54.6 mm (2.1 in)
1948	48.8 mm (1.9 in)
1949	35.6 mm (1.4 in)
1950	63.5 mm (2.5 in)
1951	38.1 mm (1.5 in)
1952	46.5 mm (1.8 in)
1953	45.7 mm (1.8 in)
1954	45.0 mm (1.8 in)
1955	100.0 mm (3.9 in)
1956	87.5 mm (3.4 in)
1957	43.0 mm (1.7 in)
1958	78.0 mm (3.1 in)
1959	46.0 mm (1.8 in)
1960	44.0 mm (1.7 in)
1961	66.0 mm (2.6 in)
1962	73.0 mm (2.9 in)
1963	54.0 mm (2.1 in)
1964	49.0 mm (1.9 in)
1965	44.0 mm (1.7 in)
1966	40.0 mm (1.6 in)
1967	90.0 mm (3.5 in)
1968	54.0 mm (2.1 in)
1969	79.5 mm (3.1 in)
1970	48.0 mm (1.9 in)
1971	32.0 mm (1.3 in)
1972	120.0 mm (4.7 in)
1973	37.5 mm (1.5 in)
1974	60.0 mm (2.4 in)
1975	50.0 mm (2.0 in)
1976	80.0 mm (3.1 in)
1977	45.5 mm (1.8 in)
1978	85.0 mm (3.3 in)
1979	70.0 mm (2.8 in)
1980	85.0 mm (3.3 in)
1981	45.0 mm (1.8 in)
1982	37.0 mm (1.5 in)
1983	68.0 mm (2.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Derdekraal, 1919 to 1983. The record is 201.0 mm (7.9 in) in 1925, marked on the chart; the median year is 79.0 mm (3.1 in).

Wettest five days (Rx5day) at Derdekraal by year
Year	Wettest five days (Rx5day)
1919	67.1 mm (2.6 in)
1920	138.4 mm (5.4 in)
1921	104.3 mm (4.1 in)
1922	87.4 mm (3.4 in)
1923	150.8 mm (5.9 in)
1924	71.6 mm (2.8 in)
1925	201.0 mm (7.9 in)
1926	58.2 mm (2.3 in)
1927	48.5 mm (1.9 in)
1928	77.2 mm (3.0 in)
1929	82.8 mm (3.3 in)
1930	82.5 mm (3.2 in)
1931	153.9 mm (6.1 in)
1932	59.7 mm (2.4 in)
1933	76.4 mm (3.0 in)
1934	78.8 mm (3.1 in)
1935	76.2 mm (3.0 in)
1936	99.3 mm (3.9 in)
1937	137.2 mm (5.4 in)
1938	56.4 mm (2.2 in)
1939	144.8 mm (5.7 in)
1940	138.5 mm (5.5 in)
1941	58.5 mm (2.3 in)
1942	67.3 mm (2.6 in)
1943	105.7 mm (4.2 in)
1944	68.5 mm (2.7 in)
1945	27.9 mm (1.1 in)
1946	113.6 mm (4.5 in)
1947	68.6 mm (2.7 in)
1948	72.2 mm (2.8 in)
1949	75.7 mm (3.0 in)
1950	69.1 mm (2.7 in)
1951	57.6 mm (2.3 in)
1952	69.1 mm (2.7 in)
1953	73.7 mm (2.9 in)
1954	79.0 mm (3.1 in)
1955	112.4 mm (4.4 in)
1956	120.0 mm (4.7 in)
1957	72.0 mm (2.8 in)
1958	98.7 mm (3.9 in)
1959	78.0 mm (3.1 in)
1960	60.0 mm (2.4 in)
1961	102.5 mm (4.0 in)
1962	83.0 mm (3.3 in)
1963	68.5 mm (2.7 in)
1964	65.0 mm (2.6 in)
1965	49.0 mm (1.9 in)
1966	79.0 mm (3.1 in)
1967	113.0 mm (4.4 in)
1968	76.0 mm (3.0 in)
1969	108.5 mm (4.3 in)
1970	67.0 mm (2.6 in)
1971	69.0 mm (2.7 in)
1972	175.0 mm (6.9 in)
1973	42.3 mm (1.7 in)
1974	82.0 mm (3.2 in)
1975	127.0 mm (5.0 in)
1976	93.0 mm (3.7 in)
1977	93.0 mm (3.7 in)
1978	125.0 mm (4.9 in)
1979	100.0 mm (3.9 in)
1980	125.0 mm (4.9 in)
1981	110.0 mm (4.3 in)
1982	51.0 mm (2.0 in)
1983	108.0 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Derdekraal, 1919 to 1983. The record is 259 days in 1966, marked on the chart; the median year is 121 days.

Longest dry spell (CDD) at Derdekraal by year
Year	Longest dry spell (CDD)
1919	12 days
1920	214 days
1921	154 days
1922	70 days
1923	174 days
1924	88 days
1925	77 days
1926	99 days
1927	80 days
1928	99 days
1929	81 days
1930	123 days
1931	86 days
1932	139 days
1933	83 days
1934	117 days
1935	136 days
1936	104 days
1937	133 days
1938	67 days
1939	58 days
1940	125 days
1941	144 days
1942	122 days
1943	39 days
1944	96 days
1945	165 days
1946	157 days
1947	102 days
1948	126 days
1949	113 days
1950	121 days
1951	56 days
1952	121 days
1953	159 days
1954	146 days
1955	121 days
1956	121 days
1957	86 days
1958	72 days
1959	86 days
1960	93 days
1961	152 days
1962	122 days
1963	116 days
1964	187 days
1965	204 days
1966	259 days
1967	84 days
1968	166 days
1969	178 days
1970	95 days
1971	151 days
1972	164 days
1973	166 days
1974	59 days
1975	137 days
1976	126 days
1977	136 days
1978	159 days
1979	132 days
1980	149 days
1981	96 days
1982	171 days
1983	84 days

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

63 years, 1920 to 1983

A day with at least 54.2 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 137.0 mm (5.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Derdekraal: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	54.2 mm (2.1 in)
5 years	73.7 mm (2.9 in)
10 years	87.6 mm (3.4 in)
25 years	106.4 mm (4.2 in)
50 years	121.4 mm (4.8 in)
100 years	137.0 mm (5.4 in)	Longer than the 63 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, 63 years of values from 1920 to 1983.

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: 124.5 mm (4.9 in) in 1937; 120.0 mm (4.7 in) in 1972; 113.0 mm (4.4 in) in 1931.

Download the Data

Data for Derdekraal standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-16 (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).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a