Rooisloot Weather Records (SF002250650)

Record envelope, standing records and threshold days for Rooisloot (SF002250650), South Africa, with 62 years of record.

Key Facts for Rooisloot

Rooisloot (SF002250650) is a weather station in South Africa at -29.58 latitude and 23.05 longitude, 991 m (3,251 ft) above sea level.
The station reports from 1936 to 1997, 62 years of record.
0 records set at Rooisloot still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Rooisloot set a daily record precipitation of 4.0 mm (0.16 in) on 26 July 1997.

About the Station

Location: South Africa, -29.58 latitude, 23.05 longitude.
Elevation: 991 m (3,251 ft).
Period of record: 1936 to 1997, 62 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 Rooisloot. 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 Rooisloot, 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 Rooisloot still stand.

Wettest Day of Each Month

Apr: 86.6 mm (3.4 in)

The wettest day on record for each calendar month at Rooisloot. The most was 86.6 mm (3.4 in) on 1 April 1953.

Record daily precipitation for each month at Rooisloot
Month	Record daily precipitation (mm)	Date
Jan	84.0 mm (3.3 in)	30 January 1975
Feb	75.4 mm (3.0 in)	14 February 1939
Mar	65.0 mm (2.6 in)	3 March 1974
Apr	86.6 mm (3.4 in)	1 April 1953
May	37.6 mm (1.5 in)	6 May 1938
Jun	29.5 mm (1.2 in)	16 June 1991
Jul	25.5 mm (1.0 in)	4 July 1959
Aug	48.5 mm (1.9 in)	29 August 1984
Sep	30.0 mm (1.2 in)	12 September 1988
Oct	32.0 mm (1.3 in)	20 October 1959
Nov	45.7 mm (1.8 in)	18 November 1936
Dec	37.5 mm (1.5 in)	24 December 1970

Latest Records

Latest records at Rooisloot
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 July 1997	Rooisloot, ZA	daily rain	4.0 mm (0.16 in)	4.0 mm (0.16 in)	60 years	20 of 100 (Routine)
27 June 1997	Rooisloot, ZA	daily rain	1.2 mm (0.05 in)	0.7 mm (0.03 in)	3 years	7 of 100 (Routine)
25 May 1997	Rooisloot, ZA	daily rain	2.5 mm (0.10 in)	2.5 mm (0.10 in)	60 years	20 of 100 (Routine)
22 May 1997	Rooisloot, ZA	daily rain	1.5 mm (0.06 in)	1.5 mm (0.06 in)	60 years	20 of 100 (Routine)
17 March 1997	Rooisloot, ZA	daily rain	24.0 mm (0.9 in)	1.0 mm (0.04 in)	22 years	12 of 100 (Routine)
16 March 1997	Rooisloot, ZA	daily rain	25.5 mm (1.0 in)	12.5 mm (0.5 in)	44 years	30 of 100 (Routine)
26 December 1996	Rooisloot, ZA	daily rain	7.5 mm (0.30 in)	7.5 mm (0.30 in)	59 years	20 of 100 (Routine)
5 December 1996	Rooisloot, ZA	daily rain	14.0 mm (0.6 in)	8.0 mm (0.31 in)	11 years	19 of 100 (Routine)
6 November 1996	Rooisloot, ZA	daily rain	21.0 mm (0.8 in)	10.5 mm (0.4 in)	34 years	20 of 100 (Routine)
25 July 1996	Rooisloot, ZA	daily rain	3.5 mm (0.14 in)	0.2 mm (0.01 in)	50 years	20 of 100 (Routine)
24 July 1996	Rooisloot, ZA	daily rain	11.5 mm (0.5 in)	2.5 mm (0.10 in)	14 years	14 of 100 (Routine)
23 July 1996	Rooisloot, ZA	daily rain	10.5 mm (0.4 in)	10.5 mm (0.4 in)	59 years	20 of 100 (Routine)
16 December 1995	Rooisloot, ZA	daily rain	17.0 mm (0.7 in)	7.0 mm (0.28 in)	20 years	20 of 100 (Routine)
12 December 1995	Rooisloot, ZA	daily rain	20.5 mm (0.8 in)	3.1 mm (0.12 in)	41 years	20 of 100 (Routine)
11 December 1995	Rooisloot, ZA	daily rain	11.5 mm (0.5 in)	6.3 mm (0.25 in)	41 years	20 of 100 (Routine)
4 August 1995	Rooisloot, ZA	daily rain	0.5 mm (0.02 in)	0.5 mm (0.02 in)	57 years	20 of 100 (Routine)
13 June 1995	Rooisloot, ZA	daily rain	4.0 mm (0.16 in)	4.0 mm (0.16 in)	57 years	20 of 100 (Routine)
4 May 1995	Rooisloot, ZA	daily rain	21.7 mm (0.9 in)	12.2 mm (0.5 in)	20 years	20 of 100 (Routine)
27 March 1995	Rooisloot, ZA	daily rain	45.0 mm (1.8 in)	26.0 mm (1.0 in)	10 years	33 of 100 (Routine)
12 January 1995	Rooisloot, ZA	daily rain	12.0 mm (0.5 in)	7.0 mm (0.28 in)	36 years	20 of 100 (Routine)

Extremes by Year

1936 to 1997

Yearly extremes at Rooisloot: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	86.6 mm (3.4 in)	1953	32.3 mm (1.3 in)	62
Wettest five days (Rx5day)	161.0 mm (6.3 in)	1974	49.0 mm (1.9 in)	62
Longest dry spell (CDD)	182 days	1977	96 days	62

Wettest day (Rx1day)

The wettest day of the year at Rooisloot, 1936 to 1997. The record is 86.6 mm (3.4 in) in 1953, marked on the chart; the median year is 32.3 mm (1.3 in).

Wettest day (Rx1day) at Rooisloot by year
Year	Wettest day (Rx1day)
1936	45.7 mm (1.8 in)
1937	43.2 mm (1.7 in)
1938	56.4 mm (2.2 in)
1939	75.4 mm (3.0 in)
1940	33.0 mm (1.3 in)
1941	46.7 mm (1.8 in)
1942	25.9 mm (1.0 in)
1943	23.4 mm (0.9 in)
1944	27.2 mm (1.1 in)
1945	17.8 mm (0.7 in)
1946	31.2 mm (1.2 in)
1947	27.9 mm (1.1 in)
1948	57.9 mm (2.3 in)
1949	39.9 mm (1.6 in)
1950	48.3 mm (1.9 in)
1951	38.4 mm (1.5 in)
1952	18.8 mm (0.7 in)
1953	86.6 mm (3.4 in)
1954	46.0 mm (1.8 in)
1955	28.7 mm (1.1 in)
1956	32.0 mm (1.3 in)
1957	24.5 mm (1.0 in)
1958	38.5 mm (1.5 in)
1959	32.0 mm (1.3 in)
1960	20.0 mm (0.8 in)
1961	19.5 mm (0.8 in)
1962	32.0 mm (1.3 in)
1963	29.0 mm (1.1 in)
1964	22.5 mm (0.9 in)
1965	23.5 mm (0.9 in)
1966	28.2 mm (1.1 in)
1967	49.5 mm (1.9 in)
1968	82.5 mm (3.2 in)
1969	58.2 mm (2.3 in)
1970	46.0 mm (1.8 in)
1971	29.0 mm (1.1 in)
1972	34.0 mm (1.3 in)
1973	72.5 mm (2.9 in)
1974	65.0 mm (2.6 in)
1975	84.0 mm (3.3 in)
1976	41.5 mm (1.6 in)
1977	39.0 mm (1.5 in)
1978	20.5 mm (0.8 in)
1979	32.5 mm (1.3 in)
1980	18.0 mm (0.7 in)
1981	33.5 mm (1.3 in)
1982	27.0 mm (1.1 in)
1983	25.0 mm (1.0 in)
1984	48.5 mm (1.9 in)
1985	26.5 mm (1.0 in)
1986	56.0 mm (2.2 in)
1987	20.5 mm (0.8 in)
1988	35.0 mm (1.4 in)
1989	72.5 mm (2.9 in)
1990	29.0 mm (1.1 in)
1991	32.0 mm (1.3 in)
1992	31.0 mm (1.2 in)
1993	26.5 mm (1.0 in)
1994	32.5 mm (1.3 in)
1995	45.0 mm (1.8 in)
1996	28.0 mm (1.1 in)
1997	25.5 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rooisloot, 1936 to 1997. The record is 161.0 mm (6.3 in) in 1974, marked on the chart; the median year is 49.0 mm (1.9 in).

Wettest five days (Rx5day) at Rooisloot by year
Year	Wettest five days (Rx5day)
1936	73.1 mm (2.9 in)
1937	43.2 mm (1.7 in)
1938	71.5 mm (2.8 in)
1939	110.5 mm (4.4 in)
1940	47.0 mm (1.9 in)
1941	126.2 mm (5.0 in)
1942	40.1 mm (1.6 in)
1943	46.5 mm (1.8 in)
1944	51.1 mm (2.0 in)
1945	19.8 mm (0.8 in)
1946	54.3 mm (2.1 in)
1947	40.6 mm (1.6 in)
1948	117.4 mm (4.6 in)
1949	42.4 mm (1.7 in)
1950	69.4 mm (2.7 in)
1951	38.4 mm (1.5 in)
1952	24.4 mm (1.0 in)
1953	92.1 mm (3.6 in)
1954	118.0 mm (4.6 in)
1955	36.7 mm (1.4 in)
1956	35.9 mm (1.4 in)
1957	27.0 mm (1.1 in)
1958	48.0 mm (1.9 in)
1959	34.0 mm (1.3 in)
1960	37.5 mm (1.5 in)
1961	37.5 mm (1.5 in)
1962	53.5 mm (2.1 in)
1963	64.5 mm (2.5 in)
1964	43.0 mm (1.7 in)
1965	30.0 mm (1.2 in)
1966	28.2 mm (1.1 in)
1967	49.5 mm (1.9 in)
1968	102.5 mm (4.0 in)
1969	88.7 mm (3.5 in)
1970	55.5 mm (2.2 in)
1971	36.5 mm (1.4 in)
1972	78.0 mm (3.1 in)
1973	72.5 mm (2.9 in)
1974	161.0 mm (6.3 in)
1975	84.0 mm (3.3 in)
1976	77.0 mm (3.0 in)
1977	61.7 mm (2.4 in)
1978	22.5 mm (0.9 in)
1979	36.0 mm (1.4 in)
1980	24.2 mm (1.0 in)
1981	64.0 mm (2.5 in)
1982	34.5 mm (1.4 in)
1983	56.0 mm (2.2 in)
1984	48.5 mm (1.9 in)
1985	42.5 mm (1.7 in)
1986	83.5 mm (3.3 in)
1987	24.0 mm (0.9 in)
1988	80.5 mm (3.2 in)
1989	137.0 mm (5.4 in)
1990	51.5 mm (2.0 in)
1991	73.0 mm (2.9 in)
1992	31.0 mm (1.2 in)
1993	28.0 mm (1.1 in)
1994	39.0 mm (1.5 in)
1995	92.5 mm (3.6 in)
1996	33.5 mm (1.3 in)
1997	81.5 mm (3.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rooisloot, 1936 to 1997. The record is 182 days in 1977, marked on the chart; the median year is 96 days.

Longest dry spell (CDD) at Rooisloot by year
Year	Longest dry spell (CDD)
1936	36 days
1937	103 days
1938	39 days
1939	42 days
1940	90 days
1941	66 days
1942	127 days
1943	56 days
1944	65 days
1945	111 days
1946	87 days
1947	53 days
1948	174 days
1949	117 days
1950	87 days
1951	66 days
1952	72 days
1953	141 days
1954	131 days
1955	88 days
1956	151 days
1957	76 days
1958	105 days
1959	82 days
1960	97 days
1961	82 days
1962	139 days
1963	105 days
1964	60 days
1965	87 days
1966	107 days
1967	73 days
1968	158 days
1969	119 days
1970	106 days
1971	62 days
1972	133 days
1973	113 days
1974	83 days
1975	139 days
1976	67 days
1977	182 days
1978	127 days
1979	58 days
1980	114 days
1981	101 days
1982	78 days
1983	95 days
1984	121 days
1985	141 days
1986	117 days
1987	117 days
1988	78 days
1989	110 days
1990	91 days
1991	97 days
1992	73 days
1993	40 days
1994	128 days
1995	67 days
1996	100 days
1997	73 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

57 years, 1937 to 1996

A day with at least 34.0 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 111.5 mm (4.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Rooisloot: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	34.0 mm (1.3 in)
5 years	48.8 mm (1.9 in)
10 years	60.6 mm (2.4 in)
25 years	78.3 mm (3.1 in)
50 years	93.8 mm (3.7 in)
100 years	111.5 mm (4.4 in)	Longer than the 57 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, 57 years of values from 1937 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: 86.6 mm (3.4 in) in 1953; 84.0 mm (3.3 in) in 1975; 82.5 mm (3.2 in) in 1968.

Download the Data

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