Grootfontein Weather Records (SF001373370)

Record envelope, standing records and threshold days for Grootfontein (SF001373370), South Africa, with 68 years of record.

Key Facts for Grootfontein

Grootfontein (SF001373370) is a weather station in South Africa at -31.12 latitude and 21.20 longitude, 1,183 m (3,881 ft) above sea level.
The station reports from 1930 to 1997, 68 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 11.5 mm (0.5 in) on 28 June 1997.

About the Station

Location: South Africa, -31.12 latitude, 21.20 longitude.
Elevation: 1,183 m (3,881 ft).
Period of record: 1930 to 1997, 68 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

Jul: 95.5 mm (3.8 in)

The wettest day on record for each calendar month at Grootfontein. The most was 95.5 mm (3.8 in) on 13 July 1952.

Record daily precipitation for each month at Grootfontein
Month	Record daily precipitation (mm)	Date
Jan	47.0 mm (1.9 in)	20 January 1976
Feb	58.5 mm (2.3 in)	21 February 1974
Mar	75.0 mm (3.0 in)	15 March 1960
Apr	57.2 mm (2.3 in)	14 April 1943
May	43.0 mm (1.7 in)	1 May 1970
Jun	57.0 mm (2.2 in)	1 June 1986
Jul	95.5 mm (3.8 in)	13 July 1952
Aug	34.5 mm (1.4 in)	19 August 1941
Sep	49.7 mm (2.0 in)	12 September 1957
Oct	62.5 mm (2.5 in)	9 October 1965
Nov	55.9 mm (2.2 in)	26 November 1933
Dec	45.0 mm (1.8 in)	4 December 1964

Latest Records

Latest records at Grootfontein
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 June 1997	Grootfontein, ZA	daily rain	11.5 mm (0.5 in)	7.7 mm (0.30 in)	46 years	20 of 100 (Routine)
8 June 1997	Grootfontein, ZA	daily rain	20.0 mm (0.8 in)	7.8 mm (0.31 in)	59 years	20 of 100 (Routine)
22 May 1997	Grootfontein, ZA	daily rain	25.0 mm (1.0 in)	21.0 mm (0.8 in)	36 years	40 of 100 (Notable)
17 March 1997	Grootfontein, ZA	daily rain	32.0 mm (1.3 in)	15.0 mm (0.6 in)	56 years	34 of 100 (Routine)
6 November 1996	Grootfontein, ZA	daily rain	45.2 mm (1.8 in)	14.2 mm (0.6 in)	43 years	31 of 100 (Routine)
18 October 1996	Grootfontein, ZA	daily rain	30.0 mm (1.2 in)	30.0 mm (1.2 in)	65 years	54 of 100 (Notable)
25 July 1996	Grootfontein, ZA	daily rain	21.5 mm (0.8 in)	16.9 mm (0.7 in)	44 years	20 of 100 (Routine)
24 July 1996	Grootfontein, ZA	daily rain	37.5 mm (1.5 in)	28.4 mm (1.1 in)	50 years	44 of 100 (Notable)
22 July 1996	Grootfontein, ZA	daily rain	30.0 mm (1.2 in)	30.0 mm (1.2 in)	65 years	49 of 100 (Notable)
16 December 1995	Grootfontein, ZA	daily rain	23.0 mm (0.9 in)	16.0 mm (0.6 in)	29 years	20 of 100 (Routine)
12 December 1995	Grootfontein, ZA	daily rain	17.0 mm (0.7 in)	13.2 mm (0.5 in)	61 years	20 of 100 (Routine)
3 December 1995	Grootfontein, ZA	daily rain	14.0 mm (0.6 in)	7.0 mm (0.28 in)	4 years	15 of 100 (Routine)
19 November 1995	Grootfontein, ZA	daily rain	15.0 mm (0.6 in)	5.9 mm (0.23 in)	58 years	20 of 100 (Routine)
1 November 1995	Grootfontein, ZA	daily rain	20.0 mm (0.8 in)	10.0 mm (0.4 in)	9 years	17 of 100 (Routine)
5 October 1995	Grootfontein, ZA	daily rain	7.5 mm (0.30 in)	7.5 mm (0.30 in)	64 years	20 of 100 (Routine)
20 August 1995	Grootfontein, ZA	daily rain	15.0 mm (0.6 in)	5.9 mm (0.23 in)	53 years	20 of 100 (Routine)
4 May 1995	Grootfontein, ZA	daily rain	7.0 mm (0.28 in)	0.6 mm (0.02 in)	54 years	20 of 100 (Routine)
23 July 1994	Grootfontein, ZA	daily rain	16.5 mm (0.6 in)	14.8 mm (0.6 in)	39 years	20 of 100 (Routine)
4 March 1994	Grootfontein, ZA	daily rain	56.0 mm (2.2 in)	45.5 mm (1.8 in)	8 years	44 of 100 (Notable)
3 March 1994	Grootfontein, ZA	daily rain	3.0 mm (0.12 in)	0.5 mm (0.02 in)	56 years	20 of 100 (Routine)

Extremes by Year

1930 to 1997

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)	95.5 mm (3.8 in)	1952	31.5 mm (1.2 in)	68
Wettest five days (Rx5day)	124.0 mm (4.9 in)	1976	42.7 mm (1.7 in)	68
Longest dry spell (CDD)	297 days	1966	82 days	68

Wettest day (Rx1day)

The wettest day of the year at Grootfontein, 1930 to 1997. The record is 95.5 mm (3.8 in) in 1952, marked on the chart; the median year is 31.5 mm (1.2 in).

Wettest day (Rx1day) at Grootfontein by year
Year	Wettest day (Rx1day)
1930	4.8 mm (0.19 in)
1931	31.8 mm (1.3 in)
1932	39.9 mm (1.6 in)
1933	55.9 mm (2.2 in)
1934	44.7 mm (1.8 in)
1935	39.6 mm (1.6 in)
1936	25.7 mm (1.0 in)
1937	12.7 mm (0.5 in)
1938	45.7 mm (1.8 in)
1939	34.5 mm (1.4 in)
1940	29.2 mm (1.1 in)
1941	39.4 mm (1.6 in)
1942	31.8 mm (1.3 in)
1943	57.2 mm (2.3 in)
1944	16.3 mm (0.6 in)
1945	10.7 mm (0.4 in)
1946	20.8 mm (0.8 in)
1947	17.0 mm (0.7 in)
1948	33.0 mm (1.3 in)
1949	20.3 mm (0.8 in)
1950	34.5 mm (1.4 in)
1951	17.3 mm (0.7 in)
1952	95.5 mm (3.8 in)
1953	31.0 mm (1.2 in)
1954	32.0 mm (1.3 in)
1955	30.0 mm (1.2 in)
1956	23.5 mm (0.9 in)
1957	49.7 mm (2.0 in)
1958	25.0 mm (1.0 in)
1959	30.7 mm (1.2 in)
1960	75.0 mm (3.0 in)
1961	53.6 mm (2.1 in)
1962	24.5 mm (1.0 in)
1963	31.1 mm (1.2 in)
1964	45.0 mm (1.8 in)
1965	62.5 mm (2.5 in)
1966	12.0 mm (0.5 in)
1967	25.0 mm (1.0 in)
1968	43.0 mm (1.7 in)
1969	52.0 mm (2.0 in)
1970	43.0 mm (1.7 in)
1971	29.0 mm (1.1 in)
1972	43.5 mm (1.7 in)
1973	51.5 mm (2.0 in)
1974	65.0 mm (2.6 in)
1975	23.5 mm (0.9 in)
1976	55.0 mm (2.2 in)
1977	38.5 mm (1.5 in)
1978	6.5 mm (0.26 in)
1979	15.0 mm (0.6 in)
1980	23.5 mm (0.9 in)
1981	33.0 mm (1.3 in)
1982	33.0 mm (1.3 in)
1983	27.5 mm (1.1 in)
1984	22.5 mm (0.9 in)
1985	33.0 mm (1.3 in)
1986	57.0 mm (2.2 in)
1987	30.0 mm (1.2 in)
1988	27.5 mm (1.1 in)
1989	19.5 mm (0.8 in)
1990	27.5 mm (1.1 in)
1991	23.0 mm (0.9 in)
1992	9.0 mm (0.35 in)
1993	16.0 mm (0.6 in)
1994	56.0 mm (2.2 in)
1995	23.0 mm (0.9 in)
1996	45.2 mm (1.8 in)
1997	32.0 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Grootfontein, 1930 to 1997. The record is 124.0 mm (4.9 in) in 1976, marked on the chart; the median year is 42.7 mm (1.7 in).

Wettest five days (Rx5day) at Grootfontein by year
Year	Wettest five days (Rx5day)
1930	4.8 mm (0.19 in)
1931	40.4 mm (1.6 in)
1932	50.8 mm (2.0 in)
1933	60.3 mm (2.4 in)
1934	77.0 mm (3.0 in)
1935	39.6 mm (1.6 in)
1936	32.6 mm (1.3 in)
1937	21.8 mm (0.9 in)
1938	57.1 mm (2.2 in)
1939	76.9 mm (3.0 in)
1940	60.7 mm (2.4 in)
1941	45.6 mm (1.8 in)
1942	31.8 mm (1.3 in)
1943	60.2 mm (2.4 in)
1944	21.9 mm (0.9 in)
1945	15.5 mm (0.6 in)
1946	29.5 mm (1.2 in)
1947	27.9 mm (1.1 in)
1948	55.4 mm (2.2 in)
1949	34.2 mm (1.3 in)
1950	35.5 mm (1.4 in)
1951	17.3 mm (0.7 in)
1952	96.5 mm (3.8 in)
1953	46.0 mm (1.8 in)
1954	36.2 mm (1.4 in)
1955	61.4 mm (2.4 in)
1956	30.2 mm (1.2 in)
1957	49.7 mm (2.0 in)
1958	43.3 mm (1.7 in)
1959	30.7 mm (1.2 in)
1960	75.0 mm (3.0 in)
1961	73.5 mm (2.9 in)
1962	24.5 mm (1.0 in)
1963	47.6 mm (1.9 in)
1964	45.0 mm (1.8 in)
1965	62.5 mm (2.5 in)
1966	23.0 mm (0.9 in)
1967	27.0 mm (1.1 in)
1968	71.0 mm (2.8 in)
1969	94.5 mm (3.7 in)
1970	44.0 mm (1.7 in)
1971	30.5 mm (1.2 in)
1972	43.5 mm (1.7 in)
1973	62.5 mm (2.5 in)
1974	107.5 mm (4.2 in)
1975	38.0 mm (1.5 in)
1976	124.0 mm (4.9 in)
1977	51.5 mm (2.0 in)
1978	11.0 mm (0.4 in)
1979	21.5 mm (0.8 in)
1980	23.5 mm (0.9 in)
1981	60.5 mm (2.4 in)
1982	33.0 mm (1.3 in)
1983	27.5 mm (1.1 in)
1984	22.5 mm (0.9 in)
1985	78.0 mm (3.1 in)
1986	72.5 mm (2.9 in)
1987	30.0 mm (1.2 in)
1988	69.0 mm (2.7 in)
1989	34.5 mm (1.4 in)
1990	42.0 mm (1.7 in)
1991	32.0 mm (1.3 in)
1992	9.0 mm (0.35 in)
1993	30.0 mm (1.2 in)
1994	92.0 mm (3.6 in)
1995	40.0 mm (1.6 in)
1996	89.0 mm (3.5 in)
1997	45.0 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Grootfontein, 1930 to 1997. The record is 297 days in 1966, marked on the chart; the median year is 82 days.

Longest dry spell (CDD) at Grootfontein by year
Year	Longest dry spell (CDD)
1930	30 days
1931	87 days
1932	97 days
1933	58 days
1934	136 days
1935	59 days
1936	56 days
1937	108 days
1938	69 days
1939	70 days
1940	57 days
1941	122 days
1942	82 days
1943	69 days
1944	71 days
1945	130 days
1946	88 days
1947	164 days
1948	64 days
1949	143 days
1950	67 days
1951	160 days
1952	91 days
1953	61 days
1954	92 days
1955	69 days
1956	91 days
1957	73 days
1958	149 days
1959	130 days
1960	117 days
1961	81 days
1962	121 days
1963	93 days
1964	90 days
1965	183 days
1966	297 days
1967	77 days
1968	89 days
1969	90 days
1970	101 days
1971	79 days
1972	247 days
1973	74 days
1974	131 days
1975	200 days
1976	69 days
1977	74 days
1978	123 days
1979	77 days
1980	106 days
1981	44 days
1982	69 days
1983	47 days
1984	68 days
1985	81 days
1986	67 days
1987	49 days
1988	72 days
1989	75 days
1990	103 days
1991	58 days
1992	88 days
1993	50 days
1994	161 days
1995	75 days
1996	52 days
1997	155 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

67 years, 1931 to 1997

A day with at least 31.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 86.3 mm (3.4 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	31.8 mm (1.3 in)
5 years	46.6 mm (1.8 in)
10 years	56.3 mm (2.2 in)
25 years	68.5 mm (2.7 in)
50 years	77.5 mm (3.1 in)
100 years	86.3 mm (3.4 in)	Longer than the 67 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, 67 years of values from 1931 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: 95.5 mm (3.8 in) in 1952; 75.0 mm (3.0 in) in 1960; 65.0 mm (2.6 in) in 1974.

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 2026-10-14 (14 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