Riethoek Weather Records (SF002037370)

Record envelope, standing records and threshold days for Riethoek (SF002037370), South Africa, with 66 years of record.

Key Facts for Riethoek

Riethoek (SF002037370) is a weather station in South Africa at -30.28 latitude and 26.92 longitude, 1,612 m (5,289 ft) above sea level.
The station reports from 1932 to 1997, 66 years of record.
0 records set at Riethoek still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Riethoek set a daily record precipitation of 25.5 mm (1.0 in) on 27 December 1996.

About the Station

Location: South Africa, -30.28 latitude, 26.92 longitude.
Elevation: 1,612 m (5,289 ft).
Period of record: 1932 to 1997, 66 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 Riethoek. 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 Riethoek, 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 Riethoek still stand.

Wettest Day of Each Month

Apr: 157.5 mm (6.2 in)

The wettest day on record for each calendar month at Riethoek. The most was 157.5 mm (6.2 in) on 22 April 1943.

Record daily precipitation for each month at Riethoek
Month	Record daily precipitation (mm)	Date
Jan	150.0 mm (5.9 in)	19 January 1967
Feb	98.9 mm (3.9 in)	27 February 1980
Mar	110.5 mm (4.4 in)	19 March 1948
Apr	157.5 mm (6.2 in)	22 April 1943
May	63.5 mm (2.5 in)	13 May 1943
Jun	42.7 mm (1.7 in)	18 June 1938
Jul	49.9 mm (2.0 in)	25 July 1983
Aug	50.1 mm (2.0 in)	30 August 1984
Sep	105.4 mm (4.1 in)	18 September 1944
Oct	75.3 mm (3.0 in)	21 October 1991
Nov	60.1 mm (2.4 in)	29 November 1983
Dec	106.0 mm (4.2 in)	29 December 1990

Latest Records

Latest records at Riethoek
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 December 1996	Riethoek, ZA	daily rain	25.5 mm (1.0 in)	3.9 mm (0.15 in)	58 years	25 of 100 (Routine)
23 November 1996	Riethoek, ZA	daily rain	31.0 mm (1.2 in)	12.0 mm (0.5 in)	33 years	25 of 100 (Routine)
23 September 1996	Riethoek, ZA	daily rain	14.1 mm (0.6 in)	0.5 mm (0.02 in)	19 years	11 of 100 (Routine)
25 December 1995	Riethoek, ZA	daily rain	98.0 mm (3.9 in)	58.5 mm (2.3 in)	16 years	44 of 100 (Notable)
15 December 1995	Riethoek, ZA	daily rain	71.0 mm (2.8 in)	41.3 mm (1.6 in)	48 years	44 of 100 (Notable)
20 September 1995	Riethoek, ZA	daily rain	46.0 mm (1.8 in)	22.5 mm (0.9 in)	16 years	26 of 100 (Routine)
27 April 1995	Riethoek, ZA	daily rain	32.5 mm (1.3 in)	14.0 mm (0.6 in)	60 years	33 of 100 (Routine)
23 March 1995	Riethoek, ZA	daily rain	22.0 mm (0.9 in)	9.3 mm (0.37 in)	48 years	20 of 100 (Routine)
1 March 1995	Riethoek, ZA	daily rain	89.0 mm (3.5 in)	66.6 mm (2.6 in)	42 years	58 of 100 (Notable)
21 November 1993	Riethoek, ZA	daily rain	35.1 mm (1.4 in)	7.6 mm (0.30 in)	7 years	14 of 100 (Routine)
14 October 1993	Riethoek, ZA	daily rain	17.5 mm (0.7 in)	2.4 mm (0.09 in)	15 years	11 of 100 (Routine)
5 October 1993	Riethoek, ZA	daily rain	31.0 mm (1.2 in)	18.8 mm (0.7 in)	55 years	37 of 100 (Notable)
11 August 1993	Riethoek, ZA	daily rain	17.0 mm (0.7 in)	2.5 mm (0.10 in)	51 years	20 of 100 (Routine)
10 June 1993	Riethoek, ZA	daily rain	5.8 mm (0.23 in)	3.8 mm (0.15 in)	54 years	20 of 100 (Routine)
3 August 1992	Riethoek, ZA	daily rain	12.0 mm (0.5 in)	7.0 mm (0.28 in)	32 years	20 of 100 (Routine)
6 December 1991	Riethoek, ZA	daily rain	58.1 mm (2.3 in)	18.1 mm (0.7 in)	22 years	22 of 100 (Routine)
2 November 1991	Riethoek, ZA	daily rain	29.9 mm (1.2 in)	3.9 mm (0.15 in)	8 years	11 of 100 (Routine)
21 October 1991	Riethoek, ZA	monthly rain	75.3 mm (3.0 in)	2.1 mm (0.08 in)	57 years	34 of 100 (Routine)
18 October 1991	Riethoek, ZA	daily rain	38.5 mm (1.5 in)	3.5 mm (0.14 in)	12 years	12 of 100 (Routine)
2 September 1991	Riethoek, ZA	daily rain	34.5 mm (1.4 in)	15.4 mm (0.6 in)	9 years	18 of 100 (Routine)

Extremes by Year

1932 to 1997

Yearly extremes at Riethoek: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	157.5 mm (6.2 in)	1943	53.9 mm (2.1 in)	66
Wettest five days (Rx5day)	182.1 mm (7.2 in)	1943	85.6 mm (3.4 in)	66
Longest dry spell (CDD)	148 days	1948	65 days	66

Wettest day (Rx1day)

The wettest day of the year at Riethoek, 1932 to 1997. The record is 157.5 mm (6.2 in) in 1943, marked on the chart; the median year is 53.9 mm (2.1 in).

Wettest day (Rx1day) at Riethoek by year
Year	Wettest day (Rx1day)
1932	30.5 mm (1.2 in)
1933	74.9 mm (2.9 in)
1934	73.2 mm (2.9 in)
1935	38.9 mm (1.5 in)
1936	101.1 mm (4.0 in)
1937	47.2 mm (1.9 in)
1938	86.4 mm (3.4 in)
1939	57.9 mm (2.3 in)
1940	52.1 mm (2.1 in)
1941	53.8 mm (2.1 in)
1942	50.3 mm (2.0 in)
1943	157.5 mm (6.2 in)
1944	105.4 mm (4.1 in)
1945	36.1 mm (1.4 in)
1946	47.0 mm (1.9 in)
1947	63.5 mm (2.5 in)
1948	110.5 mm (4.4 in)
1949	33.0 mm (1.3 in)
1950	64.3 mm (2.5 in)
1951	47.8 mm (1.9 in)
1952	34.3 mm (1.4 in)
1953	45.2 mm (1.8 in)
1954	60.1 mm (2.4 in)
1955	71.0 mm (2.8 in)
1956	48.0 mm (1.9 in)
1957	45.0 mm (1.8 in)
1958	41.0 mm (1.6 in)
1959	67.5 mm (2.7 in)
1960	55.0 mm (2.2 in)
1961	72.0 mm (2.8 in)
1962	55.0 mm (2.2 in)
1963	75.0 mm (3.0 in)
1964	45.0 mm (1.8 in)
1965	33.0 mm (1.3 in)
1966	72.5 mm (2.9 in)
1967	150.0 mm (5.9 in)
1968	65.5 mm (2.6 in)
1969	54.0 mm (2.1 in)
1970	45.0 mm (1.8 in)
1971	44.0 mm (1.7 in)
1972	41.0 mm (1.6 in)
1973	92.0 mm (3.6 in)
1974	54.0 mm (2.1 in)
1975	46.0 mm (1.8 in)
1976	60.1 mm (2.4 in)
1977	52.5 mm (2.1 in)
1978	44.9 mm (1.8 in)
1979	59.0 mm (2.3 in)
1980	98.9 mm (3.9 in)
1981	70.1 mm (2.8 in)
1982	58.5 mm (2.3 in)
1983	60.1 mm (2.4 in)
1984	50.1 mm (2.0 in)
1985	57.5 mm (2.3 in)
1986	51.0 mm (2.0 in)
1987	39.5 mm (1.6 in)
1988	49.0 mm (1.9 in)
1989	41.5 mm (1.6 in)
1990	106.0 mm (4.2 in)
1991	75.3 mm (3.0 in)
1992	33.3 mm (1.3 in)
1993	35.1 mm (1.4 in)
1994	18.0 mm (0.7 in)
1995	98.0 mm (3.9 in)
1996	39.0 mm (1.5 in)
1997	37.0 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Riethoek, 1932 to 1997. The record is 182.1 mm (7.2 in) in 1943, marked on the chart; the median year is 85.6 mm (3.4 in).

Wettest five days (Rx5day) at Riethoek by year
Year	Wettest five days (Rx5day)
1932	66.0 mm (2.6 in)
1933	144.0 mm (5.7 in)
1934	84.8 mm (3.3 in)
1935	69.2 mm (2.7 in)
1936	119.9 mm (4.7 in)
1937	62.7 mm (2.5 in)
1938	86.4 mm (3.4 in)
1939	111.0 mm (4.4 in)
1940	83.3 mm (3.3 in)
1941	129.5 mm (5.1 in)
1942	83.3 mm (3.3 in)
1943	182.1 mm (7.2 in)
1944	105.4 mm (4.1 in)
1945	36.1 mm (1.4 in)
1946	68.3 mm (2.7 in)
1947	78.0 mm (3.1 in)
1948	132.6 mm (5.2 in)
1949	69.3 mm (2.7 in)
1950	77.0 mm (3.0 in)
1951	71.6 mm (2.8 in)
1952	63.8 mm (2.5 in)
1953	59.0 mm (2.3 in)
1954	75.0 mm (3.0 in)
1955	166.7 mm (6.6 in)
1956	115.5 mm (4.5 in)
1957	82.5 mm (3.2 in)
1958	60.0 mm (2.4 in)
1959	67.5 mm (2.7 in)
1960	103.0 mm (4.1 in)
1961	81.6 mm (3.2 in)
1962	92.0 mm (3.6 in)
1963	125.0 mm (4.9 in)
1964	58.0 mm (2.3 in)
1965	38.5 mm (1.5 in)
1966	129.3 mm (5.1 in)
1967	150.0 mm (5.9 in)
1968	87.0 mm (3.4 in)
1969	120.5 mm (4.7 in)
1970	78.5 mm (3.1 in)
1971	50.1 mm (2.0 in)
1972	124.9 mm (4.9 in)
1973	92.0 mm (3.6 in)
1974	133.6 mm (5.3 in)
1975	111.5 mm (4.4 in)
1976	165.5 mm (6.5 in)
1977	61.0 mm (2.4 in)
1978	89.8 mm (3.5 in)
1979	95.2 mm (3.7 in)
1980	98.9 mm (3.9 in)
1981	105.2 mm (4.1 in)
1982	73.1 mm (2.9 in)
1983	81.1 mm (3.2 in)
1984	62.7 mm (2.5 in)
1985	91.5 mm (3.6 in)
1986	96.5 mm (3.8 in)
1987	46.1 mm (1.8 in)
1988	113.5 mm (4.5 in)
1989	92.5 mm (3.6 in)
1990	106.0 mm (4.2 in)
1991	130.5 mm (5.1 in)
1992	56.9 mm (2.2 in)
1993	49.7 mm (2.0 in)
1994	18.0 mm (0.7 in)
1995	98.0 mm (3.9 in)
1996	64.5 mm (2.5 in)
1997	55.0 mm (2.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Riethoek, 1932 to 1997. The record is 148 days in 1948, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at Riethoek by year
Year	Longest dry spell (CDD)
1932	69 days
1933	67 days
1934	56 days
1935	87 days
1936	58 days
1937	87 days
1938	50 days
1939	41 days
1940	137 days
1941	59 days
1942	111 days
1943	49 days
1944	88 days
1945	64 days
1946	63 days
1947	64 days
1948	148 days
1949	49 days
1950	38 days
1951	36 days
1952	36 days
1953	66 days
1954	65 days
1955	87 days
1956	80 days
1957	44 days
1958	107 days
1959	56 days
1960	38 days
1961	55 days
1962	86 days
1963	61 days
1964	105 days
1965	47 days
1966	85 days
1967	50 days
1968	54 days
1969	68 days
1970	48 days
1971	67 days
1972	73 days
1973	68 days
1974	109 days
1975	77 days
1976	112 days
1977	48 days
1978	41 days
1979	45 days
1980	64 days
1981	73 days
1982	56 days
1983	52 days
1984	78 days
1985	102 days
1986	44 days
1987	59 days
1988	67 days
1989	74 days
1990	56 days
1991	91 days
1992	87 days
1993	47 days
1994	99 days
1995	144 days
1996	78 days
1997	59 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

58 years, 1933 to 1995

A day with at least 55.5 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 167.1 mm (6.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Riethoek: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	55.5 mm (2.2 in)
5 years	76.2 mm (3.0 in)
10 years	93.0 mm (3.7 in)
25 years	118.5 mm (4.7 in)
50 years	141.1 mm (5.6 in)
100 years	167.1 mm (6.6 in)	Longer than the 58 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, 58 years of values from 1933 to 1995.

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: 157.5 mm (6.2 in) in 1943; 150.0 mm (5.9 in) in 1967; 110.5 mm (4.4 in) in 1948.

Download the Data

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