Groenkloof Weather Records (SF000966800)

Record envelope, standing records and threshold days for Groenkloof (SF000966800), South Africa, with 92 years of record.

Key Facts for Groenkloof

Groenkloof (SF000966800) is a weather station in South Africa at -32.33 latitude and 24.88 longitude, 900 m (2,953 ft) above sea level.
The station reports from 1906 to 1997, 92 years of record.
0 records set at Groenkloof still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Groenkloof set a daily record precipitation of 18.0 mm (0.7 in) on 27 June 1997.

About the Station

Location: South Africa, -32.33 latitude, 24.88 longitude.
Elevation: 900 m (2,953 ft).
Period of record: 1906 to 1997, 92 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 Groenkloof. 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 Groenkloof, 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 Groenkloof still stand.

Wettest Day of Each Month

May: 153.9 mm (6.1 in)

The wettest day on record for each calendar month at Groenkloof. The most was 153.9 mm (6.1 in) on 27 May 1944.

Record daily precipitation for each month at Groenkloof
Month	Record daily precipitation (mm)	Date
Jan	71.0 mm (2.8 in)	10 January 1995
Feb	68.0 mm (2.7 in)	24 February 1969
Mar	96.6 mm (3.8 in)	3 March 1974
Apr	62.7 mm (2.5 in)	19 April 1948
May	153.9 mm (6.1 in)	27 May 1944
Jun	74.2 mm (2.9 in)	18 June 1964
Jul	128.0 mm (5.0 in)	25 July 1983
Aug	66.0 mm (2.6 in)	22 August 1971
Sep	85.1 mm (3.4 in)	2 September 1968
Oct	82.5 mm (3.2 in)	22 October 1953
Nov	67.3 mm (2.6 in)	1 November 1956
Dec	89.7 mm (3.5 in)	17 December 1937

Latest Records

Latest records at Groenkloof
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 June 1997	Groenkloof, ZA	daily rain	18.0 mm (0.7 in)	8.0 mm (0.31 in)	8 years	19 of 100 (Routine)
8 June 1997	Groenkloof, ZA	daily rain	8.0 mm (0.31 in)	1.5 mm (0.06 in)	22 years	16 of 100 (Routine)
25 May 1997	Groenkloof, ZA	daily rain	4.0 mm (0.16 in)	2.7 mm (0.11 in)	62 years	20 of 100 (Routine)
5 December 1996	Groenkloof, ZA	daily rain	13.0 mm (0.5 in)	0.5 mm (0.02 in)	26 years	16 of 100 (Routine)
20 November 1996	Groenkloof, ZA	daily rain	24.0 mm (0.9 in)	2.2 mm (0.09 in)	57 years	20 of 100 (Routine)
15 November 1996	Groenkloof, ZA	daily rain	35.0 mm (1.4 in)	19.5 mm (0.8 in)	65 years	44 of 100 (Notable)
5 August 1996	Groenkloof, ZA	daily rain (Tie)	10.0 mm (0.4 in)	tie	38 years	5 of 100 (Routine)
4 August 1996	Groenkloof, ZA	daily rain	8.0 mm (0.31 in)	0.5 mm (0.02 in)	35 years	19 of 100 (Routine)
5 July 1996	Groenkloof, ZA	daily rain	10.0 mm (0.4 in)	3.1 mm (0.12 in)	65 years	20 of 100 (Routine)
2 March 1996	Groenkloof, ZA	daily rain	24.0 mm (0.9 in)	2.3 mm (0.09 in)	14 years	14 of 100 (Routine)
4 May 1995	Groenkloof, ZA	daily rain	17.0 mm (0.7 in)	3.7 mm (0.15 in)	18 years	16 of 100 (Routine)
13 January 1995	Groenkloof, ZA	daily rain	57.0 mm (2.2 in)	30.0 mm (1.2 in)	9 years	40 of 100 (Notable)
12 January 1995	Groenkloof, ZA	daily rain	51.0 mm (2.0 in)	26.9 mm (1.1 in)	44 years	48 of 100 (Notable)
10 January 1995	Groenkloof, ZA	monthly rain	71.0 mm (2.8 in)	11.0 mm (0.4 in)	9 years	31 of 100 (Routine)
25 December 1994	Groenkloof, ZA	daily rain	48.0 mm (1.9 in)	36.6 mm (1.4 in)	67 years	58 of 100 (Notable)
24 July 1994	Groenkloof, ZA	daily rain	24.0 mm (0.9 in)	2.7 mm (0.11 in)	11 years	13 of 100 (Routine)
2 February 1994	Groenkloof, ZA	daily rain	24.0 mm (0.9 in)	11.5 mm (0.5 in)	8 years	20 of 100 (Routine)
30 January 1994	Groenkloof, ZA	daily rain	18.0 mm (0.7 in)	0.7 mm (0.03 in)	48 years	20 of 100 (Routine)
6 January 1994	Groenkloof, ZA	daily rain	20.0 mm (0.8 in)	0.5 mm (0.02 in)	3 years	8 of 100 (Routine)
2 December 1993	Groenkloof, ZA	daily rain	12.0 mm (0.5 in)	1.5 mm (0.06 in)	8 years	11 of 100 (Routine)

Extremes by Year

1906 to 1997

Yearly extremes at Groenkloof: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	153.9 mm (6.1 in)	1944	46.0 mm (1.8 in)	75
Wettest five days (Rx5day)	193.2 mm (7.6 in)	1932	59.7 mm (2.4 in)	75
Longest dry spell (CDD)	105 days	1906	48 days	75

Wettest day (Rx1day)

The wettest day of the year at Groenkloof, 1906 to 1997. The record is 153.9 mm (6.1 in) in 1944, marked on the chart; the median year is 46.0 mm (1.8 in).

Wettest day (Rx1day) at Groenkloof by year
Year	Wettest day (Rx1day)
1906	57.4 mm (2.3 in)
1907	83.8 mm (3.3 in)
1908	22.9 mm (0.9 in)
1926	23.9 mm (0.9 in)
1927	21.6 mm (0.9 in)
1928	60.7 mm (2.4 in)
1929	47.5 mm (1.9 in)
1930	38.9 mm (1.5 in)
1931	79.8 mm (3.1 in)
1932	35.6 mm (1.4 in)
1933	51.8 mm (2.0 in)
1934	52.6 mm (2.1 in)
1935	29.7 mm (1.2 in)
1936	49.8 mm (2.0 in)
1937	89.7 mm (3.5 in)
1938	35.8 mm (1.4 in)
1939	38.1 mm (1.5 in)
1940	64.0 mm (2.5 in)
1941	24.4 mm (1.0 in)
1942	35.6 mm (1.4 in)
1943	52.6 mm (2.1 in)
1944	153.9 mm (6.1 in)
1945	27.9 mm (1.1 in)
1946	31.8 mm (1.3 in)
1947	42.7 mm (1.7 in)
1948	62.7 mm (2.5 in)
1949	38.1 mm (1.5 in)
1950	30.5 mm (1.2 in)
1951	36.3 mm (1.4 in)
1952	53.3 mm (2.1 in)
1953	82.5 mm (3.2 in)
1954	40.4 mm (1.6 in)
1955	39.5 mm (1.6 in)
1956	67.3 mm (2.6 in)
1957	49.5 mm (1.9 in)
1958	66.6 mm (2.6 in)
1959	37.5 mm (1.5 in)
1960	36.8 mm (1.4 in)
1961	52.5 mm (2.1 in)
1962	37.0 mm (1.5 in)
1963	52.0 mm (2.0 in)
1964	74.2 mm (2.9 in)
1965	46.0 mm (1.8 in)
1966	51.0 mm (2.0 in)
1967	45.0 mm (1.8 in)
1968	85.1 mm (3.4 in)
1969	68.0 mm (2.7 in)
1970	61.8 mm (2.4 in)
1971	66.0 mm (2.6 in)
1972	20.4 mm (0.8 in)
1973	46.0 mm (1.8 in)
1974	96.6 mm (3.8 in)
1975	55.3 mm (2.2 in)
1976	33.0 mm (1.3 in)
1977	89.5 mm (3.5 in)
1978	39.5 mm (1.6 in)
1979	46.0 mm (1.8 in)
1980	25.5 mm (1.0 in)
1981	45.0 mm (1.8 in)
1982	27.5 mm (1.1 in)
1983	128.0 mm (5.0 in)
1984	45.0 mm (1.8 in)
1985	60.0 mm (2.4 in)
1986	26.5 mm (1.0 in)
1987	32.0 mm (1.3 in)
1988	51.0 mm (2.0 in)
1989	64.5 mm (2.5 in)
1990	37.0 mm (1.5 in)
1991	21.0 mm (0.8 in)
1992	53.0 mm (2.1 in)
1993	30.0 mm (1.2 in)
1994	48.0 mm (1.9 in)
1995	71.0 mm (2.8 in)
1996	35.0 mm (1.4 in)
1997	22.0 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Groenkloof, 1906 to 1997. The record is 193.2 mm (7.6 in) in 1932, marked on the chart; the median year is 59.7 mm (2.4 in).

Wettest five days (Rx5day) at Groenkloof by year
Year	Wettest five days (Rx5day)
1906	109.7 mm (4.3 in)
1907	88.1 mm (3.5 in)
1908	34.8 mm (1.4 in)
1926	23.9 mm (0.9 in)
1927	36.7 mm (1.4 in)
1928	115.6 mm (4.6 in)
1929	59.7 mm (2.4 in)
1930	38.9 mm (1.5 in)
1931	157.6 mm (6.2 in)
1932	193.2 mm (7.6 in)
1933	76.9 mm (3.0 in)
1934	59.7 mm (2.4 in)
1935	76.9 mm (3.0 in)
1936	55.4 mm (2.2 in)
1937	117.7 mm (4.6 in)
1938	45.7 mm (1.8 in)
1939	53.3 mm (2.1 in)
1940	79.5 mm (3.1 in)
1941	45.7 mm (1.8 in)
1942	54.6 mm (2.1 in)
1943	67.6 mm (2.7 in)
1944	153.9 mm (6.1 in)
1945	54.1 mm (2.1 in)
1946	47.5 mm (1.9 in)
1947	48.3 mm (1.9 in)
1948	85.5 mm (3.4 in)
1949	65.5 mm (2.6 in)
1950	50.3 mm (2.0 in)
1951	45.7 mm (1.8 in)
1952	68.3 mm (2.7 in)
1953	150.0 mm (5.9 in)
1954	56.4 mm (2.2 in)
1955	39.5 mm (1.6 in)
1956	96.9 mm (3.8 in)
1957	58.4 mm (2.3 in)
1958	66.6 mm (2.6 in)
1959	53.5 mm (2.1 in)
1960	47.5 mm (1.9 in)
1961	88.0 mm (3.5 in)
1962	50.3 mm (2.0 in)
1963	52.0 mm (2.0 in)
1964	74.2 mm (2.9 in)
1965	56.5 mm (2.2 in)
1966	55.5 mm (2.2 in)
1967	49.5 mm (1.9 in)
1968	115.6 mm (4.6 in)
1969	77.2 mm (3.0 in)
1970	118.7 mm (4.7 in)
1971	131.5 mm (5.2 in)
1972	29.9 mm (1.2 in)
1973	65.5 mm (2.6 in)
1974	115.4 mm (4.5 in)
1975	98.0 mm (3.9 in)
1976	58.9 mm (2.3 in)
1977	135.5 mm (5.3 in)
1978	67.0 mm (2.6 in)
1979	66.0 mm (2.6 in)
1980	54.5 mm (2.1 in)
1981	78.0 mm (3.1 in)
1982	58.1 mm (2.3 in)
1983	176.8 mm (7.0 in)
1984	51.0 mm (2.0 in)
1985	93.0 mm (3.7 in)
1986	47.0 mm (1.9 in)
1987	49.0 mm (1.9 in)
1988	90.5 mm (3.6 in)
1989	100.0 mm (3.9 in)
1990	40.0 mm (1.6 in)
1991	31.5 mm (1.2 in)
1992	53.0 mm (2.1 in)
1993	35.0 mm (1.4 in)
1994	80.0 mm (3.1 in)
1995	187.0 mm (7.4 in)
1996	53.0 mm (2.1 in)
1997	58.0 mm (2.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Groenkloof, 1906 to 1997. The record is 105 days in 1906, marked on the chart; the median year is 48 days.

Longest dry spell (CDD) at Groenkloof by year
Year	Longest dry spell (CDD)
1906	105 days
1907	61 days
1908	18 days
1926	26 days
1927	68 days
1928	52 days
1929	47 days
1930	46 days
1931	70 days
1932	49 days
1933	52 days
1934	50 days
1935	46 days
1936	27 days
1937	50 days
1938	43 days
1939	25 days
1940	87 days
1941	40 days
1942	32 days
1943	43 days
1944	40 days
1945	57 days
1946	54 days
1947	41 days
1948	44 days
1949	98 days
1950	45 days
1951	66 days
1952	30 days
1953	50 days
1954	52 days
1955	35 days
1956	50 days
1957	38 days
1958	65 days
1959	51 days
1960	29 days
1961	45 days
1962	41 days
1963	33 days
1964	38 days
1965	36 days
1966	63 days
1967	33 days
1968	50 days
1969	54 days
1970	36 days
1971	31 days
1972	62 days
1973	62 days
1974	48 days
1975	49 days
1976	38 days
1977	50 days
1978	69 days
1979	45 days
1980	46 days
1981	46 days
1982	36 days
1983	45 days
1984	72 days
1985	57 days
1986	45 days
1987	44 days
1988	64 days
1989	48 days
1990	47 days
1991	89 days
1992	73 days
1993	37 days
1994	64 days
1995	64 days
1996	72 days
1997	85 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

73 years, 1906 to 1997

A day with at least 45.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 135.8 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Groenkloof: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	45.9 mm (1.8 in)
5 years	65.8 mm (2.6 in)
10 years	80.4 mm (3.2 in)
25 years	100.9 mm (4.0 in)
50 years	117.7 mm (4.6 in)
100 years	135.8 mm (5.3 in)	Longer than the 73 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, 73 years of values from 1906 to 1997.

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: 153.9 mm (6.1 in) in 1944; 128.0 mm (5.0 in) in 1983; 96.6 mm (3.8 in) in 1974.

Download the Data

Data for Groenkloof standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Groenkloof 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 2026-10-15 (15 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