De Kalk Weather Records (SF002588120)

Record envelope, standing records and threshold days for De Kalk (SF002588120), South Africa, with 70 years of record.

Key Facts for De Kalk

De Kalk (SF002588120) is a weather station in South Africa at -29.03 latitude and 24.97 longitude, 1,143 m (3,750 ft) above sea level.
The station reports from 1919 to 1988, 70 years of record.
0 records set at De Kalk still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
De Kalk set a daily record precipitation of 32.0 mm (1.3 in) on 21 February 1988.

About the Station

Location: South Africa, -29.03 latitude, 24.97 longitude.
Elevation: 1,143 m (3,750 ft).
Period of record: 1919 to 1988, 70 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 Kalk. 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 Kalk, 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 De Kalk still stand.

Wettest Day of Each Month

Mar: 116.1 mm (4.6 in)

The wettest day on record for each calendar month at De Kalk. The most was 116.1 mm (4.6 in) on 11 March 1948.

Record daily precipitation for each month at De Kalk
Month	Record daily precipitation (mm)	Date
Jan	60.3 mm (2.4 in)	21 January 1966
Feb	91.4 mm (3.6 in)	23 February 1935
Mar	116.1 mm (4.6 in)	11 March 1948
Apr	63.5 mm (2.5 in)	7 April 1950
May	50.5 mm (2.0 in)	29 May 1967
Jun	49.0 mm (1.9 in)	25 June 1957
Jul	22.6 mm (0.9 in)	14 July 1952
Aug	38.1 mm (1.5 in)	31 August 1943
Sep	70.5 mm (2.8 in)	23 September 1957
Oct	76.2 mm (3.0 in)	17 October 1941
Nov	58.5 mm (2.3 in)	29 November 1980
Dec	74.2 mm (2.9 in)	1 December 1980

Latest Records

Latest records at De Kalk
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 February 1988	De Kalk, ZA	daily rain	32.0 mm (1.3 in)	7.6 mm (0.30 in)	45 years	27 of 100 (Routine)
20 February 1988	De Kalk, ZA	daily rain	59.0 mm (2.3 in)	46.0 mm (1.8 in)	16 years	51 of 100 (Notable)
19 February 1988	De Kalk, ZA	daily rain	74.0 mm (2.9 in)	54.3 mm (2.1 in)	12 years	50 of 100 (Notable)
30 October 1987	De Kalk, ZA	daily rain	25.0 mm (1.0 in)	3.4 mm (0.13 in)	0 years	9 of 100 (Routine)
22 September 1987	De Kalk, ZA	daily rain	13.2 mm (0.5 in)	6.6 mm (0.26 in)	46 years	20 of 100 (Routine)
7 September 1987	De Kalk, ZA	daily rain	15.7 mm (0.6 in)	11.9 mm (0.5 in)	66 years	20 of 100 (Routine)
15 August 1987	De Kalk, ZA	daily rain	21.2 mm (0.8 in)	1.4 mm (0.06 in)	48 years	20 of 100 (Routine)
19 July 1987	De Kalk, ZA	daily rain	12.8 mm (0.5 in)	11.1 mm (0.4 in)	17 years	20 of 100 (Routine)
14 April 1987	De Kalk, ZA	daily rain	20.6 mm (0.8 in)	13.0 mm (0.5 in)	44 years	20 of 100 (Routine)
22 March 1987	De Kalk, ZA	daily rain	26.0 mm (1.0 in)	0.6 mm (0.02 in)	5 years	7 of 100 (Routine)
30 October 1986	De Kalk, ZA	daily rain	21.6 mm (0.9 in)	0.2 mm (0.01 in)	0 years	6 of 100 (Routine)
28 October 1986	De Kalk, ZA	daily rain	11.7 mm (0.5 in)	8.2 mm (0.32 in)	1 year	13 of 100 (Routine)
4 October 1986	De Kalk, ZA	daily rain	10.0 mm (0.4 in)	6.2 mm (0.24 in)	36 years	20 of 100 (Routine)
27 September 1986	De Kalk, ZA	daily rain	29.5 mm (1.2 in)	26.2 mm (1.0 in)	45 years	42 of 100 (Notable)
23 January 1986	De Kalk, ZA	daily rain	34.6 mm (1.4 in)	2.3 mm (0.09 in)	4 years	9 of 100 (Routine)
30 October 1985	De Kalk, ZA	daily rain	21.4 mm (0.8 in)	1.0 mm (0.04 in)	18 years	11 of 100 (Routine)
28 November 1984	De Kalk, ZA	daily rain	13.3 mm (0.5 in)	2.1 mm (0.08 in)	1 year	8 of 100 (Routine)
28 October 1984	De Kalk, ZA	daily rain	3.5 mm (0.14 in)	2.5 mm (0.10 in)	50 years	20 of 100 (Routine)
10 October 1984	De Kalk, ZA	daily rain	37.2 mm (1.5 in)	10.7 mm (0.4 in)	14 years	19 of 100 (Routine)
30 August 1984	De Kalk, ZA	daily rain	19.5 mm (0.8 in)	11.6 mm (0.5 in)	34 years	20 of 100 (Routine)

Extremes by Year

1919 to 1988

Yearly extremes at De Kalk: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	116.1 mm (4.6 in)	1948	37.8 mm (1.5 in)	69
Wettest five days (Rx5day)	168.5 mm (6.6 in)	1948	57.4 mm (2.3 in)	69
Longest dry spell (CDD)	204 days	1933	79 days	69

Wettest day (Rx1day)

The wettest day of the year at De Kalk, 1919 to 1988. The record is 116.1 mm (4.6 in) in 1948, marked on the chart; the median year is 37.8 mm (1.5 in).

Wettest day (Rx1day) at De Kalk by year
Year	Wettest day (Rx1day)
1919	4.1 mm (0.16 in)
1920	51.8 mm (2.0 in)
1921	49.3 mm (1.9 in)
1922	26.7 mm (1.1 in)
1923	43.9 mm (1.7 in)
1924	44.5 mm (1.8 in)
1926	23.4 mm (0.9 in)
1927	34.5 mm (1.4 in)
1928	37.3 mm (1.5 in)
1929	36.1 mm (1.4 in)
1930	21.3 mm (0.8 in)
1931	31.8 mm (1.3 in)
1932	46.7 mm (1.8 in)
1933	45.0 mm (1.8 in)
1934	41.7 mm (1.6 in)
1935	91.4 mm (3.6 in)
1936	53.1 mm (2.1 in)
1937	38.9 mm (1.5 in)
1938	24.9 mm (1.0 in)
1939	34.5 mm (1.4 in)
1940	32.8 mm (1.3 in)
1941	76.2 mm (3.0 in)
1942	57.4 mm (2.3 in)
1943	54.9 mm (2.2 in)
1944	39.4 mm (1.6 in)
1945	37.8 mm (1.5 in)
1946	31.0 mm (1.2 in)
1947	20.1 mm (0.8 in)
1948	116.1 mm (4.6 in)
1949	24.9 mm (1.0 in)
1950	63.5 mm (2.5 in)
1951	30.7 mm (1.2 in)
1952	57.4 mm (2.3 in)
1953	39.8 mm (1.6 in)
1954	31.6 mm (1.2 in)
1955	33.5 mm (1.3 in)
1956	41.2 mm (1.6 in)
1957	70.5 mm (2.8 in)
1958	34.6 mm (1.4 in)
1959	30.0 mm (1.2 in)
1960	23.6 mm (0.9 in)
1961	44.4 mm (1.7 in)
1962	51.5 mm (2.0 in)
1963	52.0 mm (2.0 in)
1964	37.0 mm (1.5 in)
1965	29.7 mm (1.2 in)
1966	60.3 mm (2.4 in)
1967	56.0 mm (2.2 in)
1968	32.5 mm (1.3 in)
1969	53.0 mm (2.1 in)
1970	40.6 mm (1.6 in)
1971	37.0 mm (1.5 in)
1972	33.0 mm (1.3 in)
1973	29.0 mm (1.1 in)
1974	37.5 mm (1.5 in)
1975	47.9 mm (1.9 in)
1976	34.0 mm (1.3 in)
1977	38.2 mm (1.5 in)
1978	39.5 mm (1.6 in)
1979	40.0 mm (1.6 in)
1980	74.2 mm (2.9 in)
1981	32.3 mm (1.3 in)
1982	23.2 mm (0.9 in)
1983	38.1 mm (1.5 in)
1984	37.2 mm (1.5 in)
1985	21.4 mm (0.8 in)
1986	34.6 mm (1.4 in)
1987	26.0 mm (1.0 in)
1988	74.0 mm (2.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at De Kalk, 1919 to 1988. The record is 168.5 mm (6.6 in) in 1948, marked on the chart; the median year is 57.4 mm (2.3 in).

Wettest five days (Rx5day) at De Kalk by year
Year	Wettest five days (Rx5day)
1919	4.1 mm (0.16 in)
1920	90.9 mm (3.6 in)
1921	49.3 mm (1.9 in)
1922	63.5 mm (2.5 in)
1923	43.9 mm (1.7 in)
1924	47.3 mm (1.9 in)
1926	30.4 mm (1.2 in)
1927	57.4 mm (2.3 in)
1928	52.5 mm (2.1 in)
1929	65.2 mm (2.6 in)
1930	21.3 mm (0.8 in)
1931	45.5 mm (1.8 in)
1932	46.7 mm (1.8 in)
1933	54.9 mm (2.2 in)
1934	81.1 mm (3.2 in)
1935	92.4 mm (3.6 in)
1936	63.8 mm (2.5 in)
1937	38.9 mm (1.5 in)
1938	32.0 mm (1.3 in)
1939	51.8 mm (2.0 in)
1940	33.1 mm (1.3 in)
1941	105.4 mm (4.1 in)
1942	58.9 mm (2.3 in)
1943	93.0 mm (3.7 in)
1944	63.5 mm (2.5 in)
1945	66.1 mm (2.6 in)
1946	57.3 mm (2.3 in)
1947	36.8 mm (1.4 in)
1948	168.5 mm (6.6 in)
1949	29.0 mm (1.1 in)
1950	79.5 mm (3.1 in)
1951	50.3 mm (2.0 in)
1952	79.7 mm (3.1 in)
1953	96.3 mm (3.8 in)
1954	48.3 mm (1.9 in)
1955	76.4 mm (3.0 in)
1956	75.5 mm (3.0 in)
1957	80.3 mm (3.2 in)
1958	61.3 mm (2.4 in)
1959	60.2 mm (2.4 in)
1960	32.6 mm (1.3 in)
1961	67.9 mm (2.7 in)
1962	88.5 mm (3.5 in)
1963	65.5 mm (2.6 in)
1964	46.0 mm (1.8 in)
1965	63.7 mm (2.5 in)
1966	116.6 mm (4.6 in)
1967	63.0 mm (2.5 in)
1968	52.4 mm (2.1 in)
1969	70.0 mm (2.8 in)
1970	42.5 mm (1.7 in)
1971	57.0 mm (2.2 in)
1972	65.1 mm (2.6 in)
1973	43.0 mm (1.7 in)
1974	122.5 mm (4.8 in)
1975	66.4 mm (2.6 in)
1976	62.0 mm (2.4 in)
1977	49.1 mm (1.9 in)
1978	42.9 mm (1.7 in)
1979	49.7 mm (2.0 in)
1980	137.1 mm (5.4 in)
1981	68.2 mm (2.7 in)
1982	29.1 mm (1.1 in)
1983	38.1 mm (1.5 in)
1984	41.5 mm (1.6 in)
1985	43.6 mm (1.7 in)
1986	47.6 mm (1.9 in)
1987	37.4 mm (1.5 in)
1988	165.0 mm (6.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at De Kalk, 1919 to 1988. The record is 204 days in 1933, marked on the chart; the median year is 79 days.

Longest dry spell (CDD) at De Kalk by year
Year	Longest dry spell (CDD)
1919	20 days
1920	98 days
1921	146 days
1922	88 days
1923	75 days
1924	22 days
1926	157 days
1927	85 days
1928	46 days
1929	76 days
1930	112 days
1931	100 days
1932	110 days
1933	204 days
1934	131 days
1935	78 days
1936	74 days
1937	148 days
1938	58 days
1939	53 days
1940	42 days
1941	72 days
1942	145 days
1943	38 days
1944	95 days
1945	94 days
1946	64 days
1947	53 days
1948	148 days
1949	46 days
1950	55 days
1951	112 days
1952	34 days
1953	83 days
1954	165 days
1955	79 days
1956	113 days
1957	38 days
1958	149 days
1959	97 days
1960	53 days
1961	66 days
1962	138 days
1963	63 days
1964	80 days
1965	49 days
1966	129 days
1967	79 days
1968	115 days
1969	54 days
1970	74 days
1971	54 days
1972	166 days
1973	68 days
1974	65 days
1975	117 days
1976	66 days
1977	136 days
1978	51 days
1979	47 days
1980	86 days
1981	78 days
1982	42 days
1983	57 days
1984	101 days
1985	190 days
1986	86 days
1987	95 days
1988	24 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

62 years, 1920 to 1987

A day with at least 38.1 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 108.1 mm (4.3 in) of rain is expected about once in 100 years.

Rainfall return levels at De Kalk: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.1 mm (1.5 in)
5 years	51.7 mm (2.0 in)
10 years	62.5 mm (2.5 in)
25 years	78.5 mm (3.1 in)
50 years	92.4 mm (3.6 in)
100 years	108.1 mm (4.3 in)	Longer than the 62 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, 62 years of values from 1920 to 1987.

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: 116.1 mm (4.6 in) in 1948; 91.4 mm (3.6 in) in 1935; 76.2 mm (3.0 in) in 1941.

Download the Data

Data for De Kalk standing records by year: CSV or JSON. Field meanings are on the data page.
Data for De Kalk 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). 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