Rietvallei Weather Records (SF005554410)

Record envelope, standing records and threshold days for Rietvallei (SF005554410), South Africa, with 83 years of record.

Key Facts for Rietvallei

Rietvallei (SF005554410) is a weather station in South Africa at -25.33 latitude and 30.72 longitude, 1,030 m (3,379 ft) above sea level.
The station reports from 1915 to 1997, 83 years of record.
0 records set at Rietvallei still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Rietvallei set a daily record precipitation of 3.0 mm (0.12 in) on 5 August 1997.

About the Station

Location: South Africa, -25.33 latitude, 30.72 longitude.
Elevation: 1,030 m (3,379 ft).
Period of record: 1915 to 1997, 83 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 Rietvallei. 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 Rietvallei, 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 Rietvallei still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Rietvallei between 5 May 1956 and 5 May 1956. Each dot is a new record.

Wettest Day of Each Month

May: 244.6 mm (9.6 in)

The wettest day on record for each calendar month at Rietvallei. The most was 244.6 mm (9.6 in) on 5 May 1956.

Record daily precipitation for each month at Rietvallei
Month	Record daily precipitation (mm)	Date
Jan	160.0 mm (6.3 in)	15 January 1925
Feb	146.5 mm (5.8 in)	7 February 1985
Mar	112.0 mm (4.4 in)	1 March 1993
Apr	63.5 mm (2.5 in)	17 April 1940
May	244.6 mm (9.6 in)	5 May 1956
Jun	50.8 mm (2.0 in)	9 June 1917
Jul	98.6 mm (3.9 in)	28 July 1927
Aug	59.2 mm (2.3 in)	20 August 1951
Sep	89.7 mm (3.5 in)	1 September 1988
Oct	75.5 mm (3.0 in)	1 October 1992
Nov	137.2 mm (5.4 in)	27 November 1924
Dec	106.2 mm (4.2 in)	10 December 1941

Latest Records

Latest records at Rietvallei
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
5 August 1997	Rietvallei, ZA	daily rain	3.0 mm (0.12 in)	1.7 mm (0.07 in)	54 years	20 of 100 (Routine)
28 May 1997	Rietvallei, ZA	daily rain	28.0 mm (1.1 in)	2.1 mm (0.08 in)	80 years	32 of 100 (Routine)
26 May 1997	Rietvallei, ZA	daily rain	10.0 mm (0.4 in)	1.1 mm (0.04 in)	54 years	20 of 100 (Routine)
26 March 1997	Rietvallei, ZA	daily rain	22.7 mm (0.9 in)	2.4 mm (0.09 in)	54 years	20 of 100 (Routine)
13 November 1996	Rietvallei, ZA	daily rain	43.5 mm (1.7 in)	6.5 mm (0.26 in)	5 years	13 of 100 (Routine)
24 July 1996	Rietvallei, ZA	daily rain	6.0 mm (0.24 in)	6.0 mm (0.24 in)	80 years	20 of 100 (Routine)
23 July 1996	Rietvallei, ZA	daily rain	5.0 mm (0.20 in)	4.0 mm (0.16 in)	65 years	20 of 100 (Routine)
6 July 1996	Rietvallei, ZA	daily rain	4.5 mm (0.18 in)	3.2 mm (0.13 in)	59 years	20 of 100 (Routine)
25 May 1996	Rietvallei, ZA	daily rain	6.5 mm (0.26 in)	3.2 mm (0.13 in)	47 years	20 of 100 (Routine)
29 February 1996	Rietvallei, ZA	daily rain	45.0 mm (1.8 in)	30.3 mm (1.2 in)	64 years	43 of 100 (Notable)
14 February 1996	Rietvallei, ZA	daily rain	46.5 mm (1.8 in)	10.5 mm (0.4 in)	6 years	15 of 100 (Routine)
10 February 1996	Rietvallei, ZA	daily rain	90.5 mm (3.6 in)	9.0 mm (0.35 in)	73 years	34 of 100 (Routine)
18 November 1995	Rietvallei, ZA	daily rain	44.5 mm (1.8 in)	4.9 mm (0.19 in)	78 years	34 of 100 (Routine)
30 April 1995	Rietvallei, ZA	daily rain	15.0 mm (0.6 in)	3.3 mm (0.13 in)	72 years	20 of 100 (Routine)
28 April 1995	Rietvallei, ZA	daily rain	50.0 mm (2.0 in)	4.0 mm (0.16 in)	28 years	19 of 100 (Routine)
23 March 1995	Rietvallei, ZA	daily rain	59.0 mm (2.3 in)	7.5 mm (0.30 in)	18 years	18 of 100 (Routine)
8 January 1995	Rietvallei, ZA	daily rain	82.0 mm (3.2 in)	10.0 mm (0.4 in)	4 years	14 of 100 (Routine)
14 October 1994	Rietvallei, ZA	daily rain	42.0 mm (1.7 in)	6.4 mm (0.25 in)	48 years	27 of 100 (Routine)
8 March 1994	Rietvallei, ZA	daily rain	86.0 mm (3.4 in)	18.4 mm (0.7 in)	65 years	39 of 100 (Notable)
28 August 1993	Rietvallei, ZA	daily rain	4.0 mm (0.16 in)	0.7 mm (0.03 in)	54 years	20 of 100 (Routine)

Extremes by Year

1915 to 1997

Yearly extremes at Rietvallei: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	244.6 mm (9.6 in)	1956	68.5 mm (2.7 in)	83
Wettest five days (Rx5day)	442.7 mm (17.4 in)	1956	115.5 mm (4.5 in)	83
Longest dry spell (CDD)	204 days	1923	66 days	83

Wettest day (Rx1day)

The wettest day of the year at Rietvallei, 1915 to 1997. The record is 244.6 mm (9.6 in) in 1956, marked on the chart; the median year is 68.5 mm (2.7 in).

Wettest day (Rx1day) at Rietvallei by year
Year	Wettest day (Rx1day)
1915	52.1 mm (2.1 in)
1916	50.8 mm (2.0 in)
1917	114.0 mm (4.5 in)
1918	122.7 mm (4.8 in)
1919	59.7 mm (2.4 in)
1920	57.2 mm (2.3 in)
1921	63.5 mm (2.5 in)
1922	81.5 mm (3.2 in)
1923	66.8 mm (2.6 in)
1924	137.2 mm (5.4 in)
1925	160.0 mm (6.3 in)
1926	78.7 mm (3.1 in)
1927	98.6 mm (3.9 in)
1928	76.2 mm (3.0 in)
1929	80.0 mm (3.1 in)
1930	76.2 mm (3.0 in)
1931	71.1 mm (2.8 in)
1932	46.7 mm (1.8 in)
1933	48.8 mm (1.9 in)
1934	63.0 mm (2.5 in)
1935	89.4 mm (3.5 in)
1936	64.0 mm (2.5 in)
1937	130.0 mm (5.1 in)
1938	98.3 mm (3.9 in)
1939	135.9 mm (5.4 in)
1940	63.5 mm (2.5 in)
1941	106.2 mm (4.2 in)
1942	114.0 mm (4.5 in)
1943	61.0 mm (2.4 in)
1944	61.7 mm (2.4 in)
1945	115.6 mm (4.6 in)
1946	125.0 mm (4.9 in)
1947	54.9 mm (2.2 in)
1948	47.0 mm (1.9 in)
1949	47.8 mm (1.9 in)
1950	57.2 mm (2.3 in)
1951	59.2 mm (2.3 in)
1952	73.7 mm (2.9 in)
1953	63.0 mm (2.5 in)
1954	74.0 mm (2.9 in)
1955	62.5 mm (2.5 in)
1956	244.6 mm (9.6 in)
1957	78.0 mm (3.1 in)
1958	49.0 mm (1.9 in)
1959	54.0 mm (2.1 in)
1960	68.5 mm (2.7 in)
1961	80.0 mm (3.1 in)
1962	68.5 mm (2.7 in)
1963	65.3 mm (2.6 in)
1964	48.0 mm (1.9 in)
1965	65.0 mm (2.6 in)
1966	59.5 mm (2.3 in)
1967	69.0 mm (2.7 in)
1968	71.0 mm (2.8 in)
1969	68.0 mm (2.7 in)
1970	47.5 mm (1.9 in)
1971	58.5 mm (2.3 in)
1972	94.0 mm (3.7 in)
1973	84.4 mm (3.3 in)
1974	76.2 mm (3.0 in)
1975	67.7 mm (2.7 in)
1976	64.3 mm (2.5 in)
1977	48.4 mm (1.9 in)
1978	84.0 mm (3.3 in)
1979	56.5 mm (2.2 in)
1980	50.0 mm (2.0 in)
1981	46.0 mm (1.8 in)
1982	90.6 mm (3.6 in)
1983	63.0 mm (2.5 in)
1984	116.0 mm (4.6 in)
1985	146.5 mm (5.8 in)
1986	63.0 mm (2.5 in)
1987	59.0 mm (2.3 in)
1988	96.2 mm (3.8 in)
1989	43.0 mm (1.7 in)
1990	75.0 mm (3.0 in)
1991	75.5 mm (3.0 in)
1992	75.5 mm (3.0 in)
1993	112.0 mm (4.4 in)
1994	86.0 mm (3.4 in)
1995	82.0 mm (3.2 in)
1996	90.5 mm (3.6 in)
1997	47.7 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rietvallei, 1915 to 1997. The record is 442.7 mm (17.4 in) in 1956, marked on the chart; the median year is 115.5 mm (4.5 in).

Wettest five days (Rx5day) at Rietvallei by year
Year	Wettest five days (Rx5day)
1915	79.1 mm (3.1 in)
1916	77.0 mm (3.0 in)
1917	163.4 mm (6.4 in)
1918	227.6 mm (9.0 in)
1919	104.8 mm (4.1 in)
1920	108.0 mm (4.3 in)
1921	163.5 mm (6.4 in)
1922	100.6 mm (4.0 in)
1923	122.1 mm (4.8 in)
1924	219.8 mm (8.7 in)
1925	211.6 mm (8.3 in)
1926	97.8 mm (3.9 in)
1927	128.3 mm (5.1 in)
1928	122.2 mm (4.8 in)
1929	147.3 mm (5.8 in)
1930	115.5 mm (4.5 in)
1931	92.7 mm (3.6 in)
1932	73.6 mm (2.9 in)
1933	124.5 mm (4.9 in)
1934	93.4 mm (3.7 in)
1935	92.7 mm (3.6 in)
1936	111.4 mm (4.4 in)
1937	216.9 mm (8.5 in)
1938	170.7 mm (6.7 in)
1939	233.5 mm (9.2 in)
1940	124.0 mm (4.9 in)
1941	142.8 mm (5.6 in)
1942	133.0 mm (5.2 in)
1943	112.3 mm (4.4 in)
1944	105.9 mm (4.2 in)
1945	161.3 mm (6.4 in)
1946	201.2 mm (7.9 in)
1947	124.5 mm (4.9 in)
1948	109.2 mm (4.3 in)
1949	103.4 mm (4.1 in)
1950	112.6 mm (4.4 in)
1951	74.0 mm (2.9 in)
1952	134.4 mm (5.3 in)
1953	121.0 mm (4.8 in)
1954	112.5 mm (4.4 in)
1955	119.5 mm (4.7 in)
1956	442.7 mm (17.4 in)
1957	100.5 mm (4.0 in)
1958	93.5 mm (3.7 in)
1959	57.0 mm (2.2 in)
1960	164.0 mm (6.5 in)
1961	113.3 mm (4.5 in)
1962	126.6 mm (5.0 in)
1963	74.9 mm (2.9 in)
1964	98.1 mm (3.9 in)
1965	84.3 mm (3.3 in)
1966	102.0 mm (4.0 in)
1967	95.0 mm (3.7 in)
1968	82.0 mm (3.2 in)
1969	136.5 mm (5.4 in)
1970	84.7 mm (3.3 in)
1971	128.2 mm (5.0 in)
1972	168.1 mm (6.6 in)
1973	195.8 mm (7.7 in)
1974	98.6 mm (3.9 in)
1975	133.4 mm (5.3 in)
1976	138.3 mm (5.4 in)
1977	126.3 mm (5.0 in)
1978	102.9 mm (4.1 in)
1979	110.3 mm (4.3 in)
1980	132.6 mm (5.2 in)
1981	91.0 mm (3.6 in)
1982	93.2 mm (3.7 in)
1983	79.0 mm (3.1 in)
1984	134.0 mm (5.3 in)
1985	230.0 mm (9.1 in)
1986	79.0 mm (3.1 in)
1987	121.5 mm (4.8 in)
1988	173.2 mm (6.8 in)
1989	85.8 mm (3.4 in)
1990	103.0 mm (4.1 in)
1991	188.5 mm (7.4 in)
1992	98.5 mm (3.9 in)
1993	149.2 mm (5.9 in)
1994	89.0 mm (3.5 in)
1995	153.0 mm (6.0 in)
1996	205.0 mm (8.1 in)
1997	99.5 mm (3.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rietvallei, 1915 to 1997. The record is 204 days in 1923, marked on the chart; the median year is 66 days.

Longest dry spell (CDD) at Rietvallei by year
Year	Longest dry spell (CDD)
1915	17 days
1916	168 days
1917	42 days
1918	77 days
1919	97 days
1920	83 days
1921	132 days
1922	70 days
1923	204 days
1924	82 days
1925	42 days
1926	88 days
1927	40 days
1928	73 days
1929	41 days
1930	32 days
1931	47 days
1932	103 days
1933	43 days
1934	33 days
1935	53 days
1936	52 days
1937	70 days
1938	44 days
1939	18 days
1940	39 days
1941	89 days
1942	66 days
1943	29 days
1944	57 days
1945	109 days
1946	84 days
1947	48 days
1948	72 days
1949	42 days
1950	36 days
1951	38 days
1952	34 days
1953	50 days
1954	53 days
1955	44 days
1956	59 days
1957	22 days
1958	82 days
1959	91 days
1960	75 days
1961	53 days
1962	39 days
1963	95 days
1964	90 days
1965	133 days
1966	59 days
1967	75 days
1968	83 days
1969	66 days
1970	40 days
1971	25 days
1972	115 days
1973	107 days
1974	62 days
1975	63 days
1976	161 days
1977	95 days
1978	69 days
1979	55 days
1980	74 days
1981	109 days
1982	85 days
1983	71 days
1984	65 days
1985	69 days
1986	119 days
1987	61 days
1988	52 days
1989	37 days
1990	68 days
1991	71 days
1992	130 days
1993	28 days
1994	120 days
1995	89 days
1996	52 days
1997	27 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, 1916 to 1996

A day with at least 70.8 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 179.5 mm (7.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Rietvallei: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	70.8 mm (2.8 in)
5 years	93.9 mm (3.7 in)
10 years	111.4 mm (4.4 in)
25 years	136.3 mm (5.4 in)
50 years	156.9 mm (6.2 in)
100 years	179.5 mm (7.1 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 1916 to 1996.

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: 160.0 mm (6.3 in) in 1925; 146.5 mm (5.8 in) in 1985; 137.2 mm (5.4 in) in 1924.

Download the Data

Data for Rietvallei standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rietvallei 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 2026-10-16 (16 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