Grootfontein Weather Records (SF001433450)

Record envelope, standing records and threshold days for Grootfontein (SF001433450), South Africa, with 78 years of record.

Key Facts for Grootfontein

Grootfontein (SF001433450) is a weather station in South Africa at -31.25 latitude and 24.20 longitude, 1,480 m (4,856 ft) above sea level.
The station reports from 1913 to 1990, 78 years of record.
0 records set at Grootfontein still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Grootfontein set a daily record precipitation of 80.0 mm (3.1 in) on 11 February 1989.

About the Station

Location: South Africa, -31.25 latitude, 24.20 longitude.
Elevation: 1,480 m (4,856 ft).
Period of record: 1913 to 1990, 78 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 Grootfontein. 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 Grootfontein, 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 Grootfontein still stand.

Wettest Day of Each Month

Mar: 105.4 mm (4.1 in)

The wettest day on record for each calendar month at Grootfontein. The most was 105.4 mm (4.1 in) on 15 March 1918.

Record daily precipitation for each month at Grootfontein
Month	Record daily precipitation (mm)	Date
Jan	86.6 mm (3.4 in)	30 January 1920
Feb	80.5 mm (3.2 in)	27 February 1974
Mar	105.4 mm (4.1 in)	15 March 1918
Apr	93.3 mm (3.7 in)	1 April 1953
May	31.2 mm (1.2 in)	3 May 1929
Jun	30.0 mm (1.2 in)	26 June 1988
Jul	52.5 mm (2.1 in)	17 July 1965
Aug	45.0 mm (1.8 in)	18 August 1974
Sep	43.2 mm (1.7 in)	30 September 1929
Oct	61.0 mm (2.4 in)	2 October 1946
Nov	48.5 mm (1.9 in)	17 November 1934
Dec	48.5 mm (1.9 in)	3 December 1947

Latest Records

Latest records at Grootfontein
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 February 1989	Grootfontein, ZA	daily rain	80.0 mm (3.1 in)	63.5 mm (2.5 in)	27 years	55 of 100 (Notable)
7 February 1989	Grootfontein, ZA	daily rain	18.0 mm (0.7 in)	6.6 mm (0.26 in)	57 years	20 of 100 (Routine)
5 January 1989	Grootfontein, ZA	daily rain	48.0 mm (1.9 in)	25.0 mm (1.0 in)	13 years	31 of 100 (Routine)
28 December 1988	Grootfontein, ZA	daily rain	21.0 mm (0.8 in)	0.3 mm (0.01 in)	30 years	16 of 100 (Routine)
23 December 1988	Grootfontein, ZA	daily rain	6.5 mm (0.26 in)	0.9 mm (0.04 in)	51 years	20 of 100 (Routine)
18 December 1988	Grootfontein, ZA	daily rain	18.0 mm (0.7 in)	6.6 mm (0.26 in)	51 years	20 of 100 (Routine)
18 November 1988	Grootfontein, ZA	daily rain	26.0 mm (1.0 in)	12.0 mm (0.5 in)	63 years	37 of 100 (Notable)
13 October 1988	Grootfontein, ZA	daily rain	8.0 mm (0.31 in)	0.5 mm (0.02 in)	12 years	10 of 100 (Routine)
27 June 1988	Grootfontein, ZA	daily rain	3.0 mm (0.12 in)	2.4 mm (0.09 in)	31 years	20 of 100 (Routine)
26 June 1988	Grootfontein, ZA	monthly rain	30.0 mm (1.2 in)	0.8 mm (0.03 in)	74 years	40 of 100 (Notable)
1 March 1988	Grootfontein, ZA	daily rain	39.5 mm (1.6 in)	12.5 mm (0.5 in)	12 years	19 of 100 (Routine)
18 February 1988	Grootfontein, ZA	daily rain	41.5 mm (1.6 in)	12.5 mm (0.5 in)	49 years	32 of 100 (Routine)
12 November 1987	Grootfontein, ZA	daily rain	40.0 mm (1.6 in)	18.4 mm (0.7 in)	56 years	43 of 100 (Notable)
11 November 1987	Grootfontein, ZA	daily rain	9.5 mm (0.37 in)	1.0 mm (0.04 in)	8 years	10 of 100 (Routine)
22 September 1987	Grootfontein, ZA	daily rain	27.0 mm (1.1 in)	25.5 mm (1.0 in)	4 years	38 of 100 (Notable)
21 September 1987	Grootfontein, ZA	daily rain	11.5 mm (0.5 in)	3.5 mm (0.14 in)	20 years	17 of 100 (Routine)
7 September 1987	Grootfontein, ZA	daily rain	7.5 mm (0.30 in)	7.0 mm (0.28 in)	12 years	18 of 100 (Routine)
18 July 1987	Grootfontein, ZA	daily rain	19.0 mm (0.7 in)	11.0 mm (0.4 in)	10 years	20 of 100 (Routine)
11 May 1987	Grootfontein, ZA	daily rain	20.0 mm (0.8 in)	8.3 mm (0.33 in)	52 years	20 of 100 (Routine)
4 October 1986	Grootfontein, ZA	daily rain	22.0 mm (0.9 in)	7.5 mm (0.30 in)	9 years	17 of 100 (Routine)

Extremes by Year

1913 to 1990

Yearly extremes at Grootfontein: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	105.4 mm (4.1 in)	1918	35.8 mm (1.4 in)	78
Wettest five days (Rx5day)	234.5 mm (9.2 in)	1974	56.2 mm (2.2 in)	78
Longest dry spell (CDD)	150 days	1922	66 days	78

Wettest day (Rx1day)

The wettest day of the year at Grootfontein, 1913 to 1990. The record is 105.4 mm (4.1 in) in 1918, marked on the chart; the median year is 35.8 mm (1.4 in).

Wettest day (Rx1day) at Grootfontein by year
Year	Wettest day (Rx1day)
1913	29.2 mm (1.1 in)
1914	47.0 mm (1.9 in)
1915	62.2 mm (2.4 in)
1916	25.1 mm (1.0 in)
1917	38.1 mm (1.5 in)
1918	105.4 mm (4.1 in)
1919	26.9 mm (1.1 in)
1920	86.6 mm (3.4 in)
1921	48.8 mm (1.9 in)
1922	20.3 mm (0.8 in)
1923	30.7 mm (1.2 in)
1924	51.6 mm (2.0 in)
1925	36.1 mm (1.4 in)
1926	27.7 mm (1.1 in)
1927	15.0 mm (0.6 in)
1928	33.5 mm (1.3 in)
1929	43.2 mm (1.7 in)
1930	30.7 mm (1.2 in)
1931	46.0 mm (1.8 in)
1932	29.5 mm (1.2 in)
1933	24.6 mm (1.0 in)
1934	48.5 mm (1.9 in)
1935	31.2 mm (1.2 in)
1936	36.6 mm (1.4 in)
1937	23.6 mm (0.9 in)
1938	29.0 mm (1.1 in)
1939	69.3 mm (2.7 in)
1940	31.8 mm (1.3 in)
1941	28.2 mm (1.1 in)
1942	36.8 mm (1.4 in)
1943	31.2 mm (1.2 in)
1944	57.2 mm (2.3 in)
1945	31.8 mm (1.3 in)
1946	61.0 mm (2.4 in)
1947	48.5 mm (1.9 in)
1948	37.8 mm (1.5 in)
1949	29.5 mm (1.2 in)
1950	44.5 mm (1.8 in)
1951	26.4 mm (1.0 in)
1952	35.1 mm (1.4 in)
1953	93.3 mm (3.7 in)
1954	26.5 mm (1.0 in)
1955	48.3 mm (1.9 in)
1956	77.6 mm (3.1 in)
1957	23.9 mm (0.9 in)
1958	35.3 mm (1.4 in)
1959	22.1 mm (0.9 in)
1960	27.7 mm (1.1 in)
1961	44.0 mm (1.7 in)
1962	26.0 mm (1.0 in)
1963	45.5 mm (1.8 in)
1964	22.5 mm (0.9 in)
1965	52.5 mm (2.1 in)
1966	23.5 mm (0.9 in)
1967	35.0 mm (1.4 in)
1968	22.0 mm (0.9 in)
1969	35.5 mm (1.4 in)
1970	33.0 mm (1.3 in)
1971	68.0 mm (2.7 in)
1972	43.0 mm (1.7 in)
1973	35.0 mm (1.4 in)
1974	102.0 mm (4.0 in)
1975	41.0 mm (1.6 in)
1976	59.0 mm (2.3 in)
1977	40.0 mm (1.6 in)
1978	45.6 mm (1.8 in)
1979	32.5 mm (1.3 in)
1980	34.5 mm (1.4 in)
1981	36.8 mm (1.4 in)
1982	36.0 mm (1.4 in)
1983	35.1 mm (1.4 in)
1984	37.5 mm (1.5 in)
1985	59.5 mm (2.3 in)
1986	22.0 mm (0.9 in)
1987	40.0 mm (1.6 in)
1988	41.5 mm (1.6 in)
1989	80.0 mm (3.1 in)
1990	17.5 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Grootfontein, 1913 to 1990. The record is 234.5 mm (9.2 in) in 1974, marked on the chart; the median year is 56.2 mm (2.2 in).

Wettest five days (Rx5day) at Grootfontein by year
Year	Wettest five days (Rx5day)
1913	48.5 mm (1.9 in)
1914	47.0 mm (1.9 in)
1915	76.4 mm (3.0 in)
1916	29.2 mm (1.1 in)
1917	65.8 mm (2.6 in)
1918	173.5 mm (6.8 in)
1919	36.0 mm (1.4 in)
1920	162.1 mm (6.4 in)
1921	69.6 mm (2.7 in)
1922	33.5 mm (1.3 in)
1923	52.8 mm (2.1 in)
1924	55.9 mm (2.2 in)
1925	48.7 mm (1.9 in)
1926	34.6 mm (1.4 in)
1927	20.8 mm (0.8 in)
1928	83.3 mm (3.3 in)
1929	43.9 mm (1.7 in)
1930	78.5 mm (3.1 in)
1931	93.8 mm (3.7 in)
1932	93.8 mm (3.7 in)
1933	36.8 mm (1.4 in)
1934	78.0 mm (3.1 in)
1935	71.4 mm (2.8 in)
1936	46.3 mm (1.8 in)
1937	32.5 mm (1.3 in)
1938	56.4 mm (2.2 in)
1939	107.9 mm (4.2 in)
1940	79.3 mm (3.1 in)
1941	56.4 mm (2.2 in)
1942	61.9 mm (2.4 in)
1943	47.0 mm (1.9 in)
1944	115.9 mm (4.6 in)
1945	57.2 mm (2.3 in)
1946	64.5 mm (2.5 in)
1947	48.5 mm (1.9 in)
1948	78.9 mm (3.1 in)
1949	51.6 mm (2.0 in)
1950	71.9 mm (2.8 in)
1951	26.4 mm (1.0 in)
1952	69.2 mm (2.7 in)
1953	97.1 mm (3.8 in)
1954	53.1 mm (2.1 in)
1955	48.3 mm (1.9 in)
1956	96.7 mm (3.8 in)
1957	51.4 mm (2.0 in)
1958	51.4 mm (2.0 in)
1959	32.2 mm (1.3 in)
1960	38.5 mm (1.5 in)
1961	63.7 mm (2.5 in)
1962	52.5 mm (2.1 in)
1963	71.0 mm (2.8 in)
1964	37.0 mm (1.5 in)
1965	81.5 mm (3.2 in)
1966	28.0 mm (1.1 in)
1967	49.6 mm (2.0 in)
1968	45.5 mm (1.8 in)
1969	76.5 mm (3.0 in)
1970	42.5 mm (1.7 in)
1971	68.5 mm (2.7 in)
1972	85.1 mm (3.4 in)
1973	65.1 mm (2.6 in)
1974	234.5 mm (9.2 in)
1975	66.0 mm (2.6 in)
1976	122.0 mm (4.8 in)
1977	47.5 mm (1.9 in)
1978	47.5 mm (1.9 in)
1979	37.5 mm (1.5 in)
1980	42.6 mm (1.7 in)
1981	79.7 mm (3.1 in)
1982	49.3 mm (1.9 in)
1983	39.6 mm (1.6 in)
1984	61.5 mm (2.4 in)
1985	86.0 mm (3.4 in)
1986	47.7 mm (1.9 in)
1987	53.5 mm (2.1 in)
1988	122.0 mm (4.8 in)
1989	98.5 mm (3.9 in)
1990	17.5 mm (0.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Grootfontein, 1913 to 1990. The record is 150 days in 1922, marked on the chart; the median year is 66 days.

Longest dry spell (CDD) at Grootfontein by year
Year	Longest dry spell (CDD)
1913	75 days
1914	137 days
1915	69 days
1916	66 days
1917	45 days
1918	68 days
1919	119 days
1920	148 days
1921	113 days
1922	150 days
1923	112 days
1924	88 days
1925	40 days
1926	97 days
1927	82 days
1928	84 days
1929	46 days
1930	121 days
1931	77 days
1932	105 days
1933	65 days
1934	143 days
1935	48 days
1936	59 days
1937	102 days
1938	52 days
1939	54 days
1940	63 days
1941	61 days
1942	58 days
1943	59 days
1944	65 days
1945	82 days
1946	70 days
1947	100 days
1948	64 days
1949	138 days
1950	35 days
1951	64 days
1952	61 days
1953	34 days
1954	58 days
1955	92 days
1956	37 days
1957	39 days
1958	106 days
1959	82 days
1960	52 days
1961	55 days
1962	71 days
1963	68 days
1964	61 days
1965	54 days
1966	103 days
1967	50 days
1968	64 days
1969	74 days
1970	39 days
1971	46 days
1972	82 days
1973	74 days
1974	70 days
1975	66 days
1976	43 days
1977	35 days
1978	57 days
1979	49 days
1980	72 days
1981	46 days
1982	41 days
1983	47 days
1984	71 days
1985	76 days
1986	60 days
1987	49 days
1988	66 days
1989	82 days
1990	26 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

76 years, 1913 to 1988

A day with at least 36.0 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 114.0 mm (4.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Grootfontein: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	36.0 mm (1.4 in)
5 years	50.6 mm (2.0 in)
10 years	62.3 mm (2.5 in)
25 years	80.1 mm (3.2 in)
50 years	95.9 mm (3.8 in)
100 years	114.0 mm (4.5 in)	Longer than the 76 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, 76 years of values from 1913 to 1988.

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: 105.4 mm (4.1 in) in 1918; 102.0 mm (4.0 in) in 1974; 93.3 mm (3.7 in) in 1953.

Download the Data

Data for Grootfontein standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grootfontein 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 2026-10-12 (12 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