Blackdown Weather Records (SF000097830)

Record envelope, standing records and threshold days for Blackdown (SF000097830), South Africa, with 78 years of record.

Key Facts for Blackdown

Blackdown (SF000097830) is a weather station in South Africa at -34.07 latitude and 20.97 longitude, 98 m (322 ft) above sea level.
The station reports from 1920 to 1997, 78 years of record.
0 records set at Blackdown still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Blackdown set a daily record precipitation of 41.0 mm (1.6 in) on 19 July 1997.

About the Station

Location: South Africa, -34.07 latitude, 20.97 longitude.
Elevation: 98 m (322 ft).
Period of record: 1920 to 1997, 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 Blackdown. 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 Blackdown, 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 Blackdown still stand.

All-Time Record Progression

2 new records

2 all-time records were set at Blackdown between 19 August 1962 and 26 April 1981. Each dot is a new record.

When Blackdown set new all-time records
Date	Kind	Detail
1962-08-19	Record daily precipitation	Record daily precipitation 154.0 mm (6.1 in)
1981-04-26	Record daily precipitation	Record daily precipitation 168.0 mm (6.6 in)

Wettest Day of Each Month

Apr: 168.0 mm (6.6 in)

The wettest day on record for each calendar month at Blackdown. The most was 168.0 mm (6.6 in) on 26 April 1981.

Record daily precipitation for each month at Blackdown
Month	Record daily precipitation (mm)	Date
Jan	89.2 mm (3.5 in)	10 January 1951
Feb	73.7 mm (2.9 in)	25 February 1930
Mar	69.0 mm (2.7 in)	25 March 1981
Apr	168.0 mm (6.6 in)	26 April 1981
May	54.0 mm (2.1 in)	1 May 1954
Jun	60.0 mm (2.4 in)	14 June 1969
Jul	59.0 mm (2.3 in)	13 July 1959
Aug	154.0 mm (6.1 in)	19 August 1962
Sep	68.5 mm (2.7 in)	20 September 1972
Oct	132.1 mm (5.2 in)	11 October 1934
Nov	137.2 mm (5.4 in)	24 November 1928
Dec	64.5 mm (2.5 in)	23 December 1994

Latest Records

Latest records at Blackdown
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
19 July 1997	Blackdown, ZA	daily rain	41.0 mm (1.6 in)	28.0 mm (1.1 in)	16 years	49 of 100 (Notable)
19 March 1997	Blackdown, ZA	daily rain	39.5 mm (1.6 in)	27.0 mm (1.1 in)	28 years	45 of 100 (Notable)
21 November 1996	Blackdown, ZA	daily rain	49.5 mm (1.9 in)	35.0 mm (1.4 in)	63 years	53 of 100 (Notable)
22 October 1996	Blackdown, ZA	daily rain	35.0 mm (1.4 in)	8.5 mm (0.33 in)	25 years	21 of 100 (Routine)
2 March 1996	Blackdown, ZA	daily rain	23.0 mm (0.9 in)	13.5 mm (0.5 in)	3 years	20 of 100 (Routine)
15 December 1995	Blackdown, ZA	daily rain	16.0 mm (0.6 in)	3.3 mm (0.13 in)	42 years	20 of 100 (Routine)
29 November 1995	Blackdown, ZA	daily rain	37.0 mm (1.5 in)	19.5 mm (0.8 in)	40 years	35 of 100 (Notable)
29 September 1995	Blackdown, ZA	daily rain	15.0 mm (0.6 in)	0.5 mm (0.02 in)	28 years	15 of 100 (Routine)
7 May 1995	Blackdown, ZA	daily rain (Tie)	6.0 mm (0.24 in)	tie	34 years	4 of 100 (Routine)
26 March 1995	Blackdown, ZA	daily rain	14.5 mm (0.6 in)	5.5 mm (0.22 in)	34 years	20 of 100 (Routine)
15 February 1995	Blackdown, ZA	daily rain	22.5 mm (0.9 in)	7.0 mm (0.28 in)	4 years	15 of 100 (Routine)
7 January 1995	Blackdown, ZA	daily rain	8.5 mm (0.33 in)	0.5 mm (0.02 in)	4 years	8 of 100 (Routine)
23 December 1994	Blackdown, ZA	monthly rain	64.5 mm (2.5 in)	13.4 mm (0.5 in)	66 years	51 of 100 (Notable)
2 August 1994	Blackdown, ZA	daily rain	29.5 mm (1.2 in)	12.5 mm (0.5 in)	32 years	27 of 100 (Routine)
23 July 1994	Blackdown, ZA	daily rain	12.0 mm (0.5 in)	3.0 mm (0.12 in)	1 year	11 of 100 (Routine)
7 January 1994	Blackdown, ZA	daily rain (Tie)	8.0 mm (0.31 in)	tie	3 years	1 of 100 (Routine)
9 December 1993	Blackdown, ZA	daily rain	1.5 mm (0.06 in)	0.5 mm (0.02 in)	7 years	9 of 100 (Routine)
2 December 1993	Blackdown, ZA	daily rain	21.5 mm (0.8 in)	3.5 mm (0.14 in)	8 years	12 of 100 (Routine)
23 September 1993	Blackdown, ZA	daily rain	17.5 mm (0.7 in)	8.0 mm (0.31 in)	10 years	19 of 100 (Routine)
12 April 1993	Blackdown, ZA	daily rain	63.0 mm (2.5 in)	45.5 mm (1.8 in)	16 years	46 of 100 (Notable)

Extremes by Year

1920 to 1997

Yearly extremes at Blackdown: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	168.0 mm (6.6 in)	1981	44.8 mm (1.8 in)	78
Wettest five days (Rx5day)	185.0 mm (7.3 in)	1981	62.4 mm (2.5 in)	78
Longest dry spell (CDD)	76 days	1957	32 days	78

Wettest day (Rx1day)

The wettest day of the year at Blackdown, 1920 to 1997. The record is 168.0 mm (6.6 in) in 1981, marked on the chart; the median year is 44.8 mm (1.8 in).

Wettest day (Rx1day) at Blackdown by year
Year	Wettest day (Rx1day)
1920	49.5 mm (1.9 in)
1921	26.2 mm (1.0 in)
1922	80.3 mm (3.2 in)
1923	35.6 mm (1.4 in)
1924	25.4 mm (1.0 in)
1925	23.1 mm (0.9 in)
1926	25.4 mm (1.0 in)
1927	26.7 mm (1.1 in)
1928	137.2 mm (5.4 in)
1929	27.2 mm (1.1 in)
1930	73.7 mm (2.9 in)
1931	52.1 mm (2.1 in)
1932	62.7 mm (2.5 in)
1933	35.6 mm (1.4 in)
1934	132.1 mm (5.2 in)
1935	27.2 mm (1.1 in)
1936	61.0 mm (2.4 in)
1937	20.8 mm (0.8 in)
1938	40.9 mm (1.6 in)
1939	56.9 mm (2.2 in)
1940	37.6 mm (1.5 in)
1941	72.4 mm (2.9 in)
1942	20.6 mm (0.8 in)
1943	69.9 mm (2.8 in)
1944	37.6 mm (1.5 in)
1945	24.9 mm (1.0 in)
1946	26.7 mm (1.1 in)
1947	47.2 mm (1.9 in)
1948	35.6 mm (1.4 in)
1949	50.8 mm (2.0 in)
1950	34.0 mm (1.3 in)
1951	89.2 mm (3.5 in)
1952	34.8 mm (1.4 in)
1953	50.0 mm (2.0 in)
1954	54.0 mm (2.1 in)
1955	48.5 mm (1.9 in)
1956	54.7 mm (2.2 in)
1957	27.9 mm (1.1 in)
1958	34.0 mm (1.3 in)
1959	59.0 mm (2.3 in)
1960	50.5 mm (2.0 in)
1961	41.0 mm (1.6 in)
1962	154.0 mm (6.1 in)
1963	46.5 mm (1.8 in)
1964	58.0 mm (2.3 in)
1965	59.0 mm (2.3 in)
1966	41.0 mm (1.6 in)
1967	26.0 mm (1.0 in)
1968	40.0 mm (1.6 in)
1969	60.0 mm (2.4 in)
1970	34.5 mm (1.4 in)
1971	44.5 mm (1.8 in)
1972	68.5 mm (2.7 in)
1973	32.5 mm (1.3 in)
1974	51.0 mm (2.0 in)
1975	50.5 mm (2.0 in)
1976	33.0 mm (1.3 in)
1977	41.5 mm (1.6 in)
1978	24.0 mm (0.9 in)
1979	52.5 mm (2.1 in)
1980	45.0 mm (1.8 in)
1981	168.0 mm (6.6 in)
1982	61.5 mm (2.4 in)
1983	24.0 mm (0.9 in)
1984	32.0 mm (1.3 in)
1985	47.0 mm (1.9 in)
1986	66.0 mm (2.6 in)
1987	63.0 mm (2.5 in)
1988	32.0 mm (1.3 in)
1989	26.0 mm (1.0 in)
1990	44.5 mm (1.8 in)
1991	41.5 mm (1.6 in)
1992	50.0 mm (2.0 in)
1993	63.0 mm (2.5 in)
1994	64.5 mm (2.5 in)
1995	38.0 mm (1.5 in)
1996	49.5 mm (1.9 in)
1997	41.0 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Blackdown, 1920 to 1997. The record is 185.0 mm (7.3 in) in 1981, marked on the chart; the median year is 62.4 mm (2.5 in).

Wettest five days (Rx5day) at Blackdown by year
Year	Wettest five days (Rx5day)
1920	56.4 mm (2.2 in)
1921	35.0 mm (1.4 in)
1922	82.6 mm (3.3 in)
1923	52.1 mm (2.1 in)
1924	31.0 mm (1.2 in)
1925	28.5 mm (1.1 in)
1926	49.3 mm (1.9 in)
1927	53.4 mm (2.1 in)
1928	177.8 mm (7.0 in)
1929	56.2 mm (2.2 in)
1930	95.3 mm (3.8 in)
1931	94.1 mm (3.7 in)
1932	94.7 mm (3.7 in)
1933	75.0 mm (3.0 in)
1934	132.1 mm (5.2 in)
1935	43.7 mm (1.7 in)
1936	108.0 mm (4.3 in)
1937	30.0 mm (1.2 in)
1938	42.7 mm (1.7 in)
1939	72.3 mm (2.8 in)
1940	60.1 mm (2.4 in)
1941	87.1 mm (3.4 in)
1942	51.0 mm (2.0 in)
1943	104.7 mm (4.1 in)
1944	56.0 mm (2.2 in)
1945	57.7 mm (2.3 in)
1946	44.4 mm (1.7 in)
1947	70.9 mm (2.8 in)
1948	74.4 mm (2.9 in)
1949	101.6 mm (4.0 in)
1950	44.4 mm (1.7 in)
1951	91.7 mm (3.6 in)
1952	54.6 mm (2.1 in)
1953	62.2 mm (2.4 in)
1954	77.5 mm (3.1 in)
1955	74.5 mm (2.9 in)
1956	78.7 mm (3.1 in)
1957	47.0 mm (1.9 in)
1958	61.3 mm (2.4 in)
1959	85.0 mm (3.3 in)
1960	62.5 mm (2.5 in)
1961	50.0 mm (2.0 in)
1962	173.5 mm (6.8 in)
1963	56.5 mm (2.2 in)
1964	61.5 mm (2.4 in)
1965	82.6 mm (3.3 in)
1966	59.0 mm (2.3 in)
1967	49.5 mm (1.9 in)
1968	58.5 mm (2.3 in)
1969	69.5 mm (2.7 in)
1970	52.5 mm (2.1 in)
1971	60.8 mm (2.4 in)
1972	79.0 mm (3.1 in)
1973	62.5 mm (2.5 in)
1974	93.0 mm (3.7 in)
1975	54.0 mm (2.1 in)
1976	55.0 mm (2.2 in)
1977	96.0 mm (3.8 in)
1978	37.5 mm (1.5 in)
1979	74.7 mm (2.9 in)
1980	107.0 mm (4.2 in)
1981	185.0 mm (7.3 in)
1982	91.5 mm (3.6 in)
1983	44.5 mm (1.8 in)
1984	34.0 mm (1.3 in)
1985	69.0 mm (2.7 in)
1986	141.5 mm (5.6 in)
1987	65.0 mm (2.6 in)
1988	51.0 mm (2.0 in)
1989	62.0 mm (2.4 in)
1990	48.0 mm (1.9 in)
1991	57.0 mm (2.2 in)
1992	66.5 mm (2.6 in)
1993	99.0 mm (3.9 in)
1994	83.5 mm (3.3 in)
1995	78.5 mm (3.1 in)
1996	71.5 mm (2.8 in)
1997	60.5 mm (2.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Blackdown, 1920 to 1997. The record is 76 days in 1957, marked on the chart; the median year is 32 days.

Longest dry spell (CDD) at Blackdown by year
Year	Longest dry spell (CDD)
1920	23 days
1921	21 days
1922	32 days
1923	37 days
1924	32 days
1925	35 days
1926	29 days
1927	30 days
1928	30 days
1929	37 days
1930	31 days
1931	27 days
1932	30 days
1933	47 days
1934	29 days
1935	29 days
1936	32 days
1937	40 days
1938	46 days
1939	41 days
1940	38 days
1941	26 days
1942	26 days
1943	29 days
1944	35 days
1945	41 days
1946	44 days
1947	34 days
1948	26 days
1949	30 days
1950	25 days
1951	64 days
1952	32 days
1953	51 days
1954	40 days
1955	49 days
1956	21 days
1957	76 days
1958	40 days
1959	27 days
1960	29 days
1961	29 days
1962	35 days
1963	26 days
1964	23 days
1965	26 days
1966	41 days
1967	35 days
1968	46 days
1969	46 days
1970	34 days
1971	23 days
1972	28 days
1973	29 days
1974	37 days
1975	36 days
1976	38 days
1977	29 days
1978	33 days
1979	36 days
1980	27 days
1981	33 days
1982	44 days
1983	25 days
1984	43 days
1985	33 days
1986	29 days
1987	34 days
1988	36 days
1989	32 days
1990	27 days
1991	60 days
1992	36 days
1993	20 days
1994	33 days
1995	24 days
1996	26 days
1997	20 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

72 years, 1922 to 1997

A day with at least 44.2 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 159.9 mm (6.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Blackdown: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	44.2 mm (1.7 in)
5 years	65.0 mm (2.6 in)
10 years	82.1 mm (3.2 in)
25 years	108.5 mm (4.3 in)
50 years	132.2 mm (5.2 in)
100 years	159.9 mm (6.3 in)	Longer than the 72 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, 72 years of values from 1922 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: 168.0 mm (6.6 in) in 1981; 154.0 mm (6.1 in) in 1962; 137.2 mm (5.4 in) in 1928.

Download the Data

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