Blackburn Weather Records (SF002411310)

Record envelope, standing records and threshold days for Blackburn (SF002411310), South Africa, with 83 years of record.

Key Facts for Blackburn

Blackburn (SF002411310) is a weather station in South Africa at -29.68 latitude and 31.08 longitude, 15 m (49 ft) above sea level.
The station reports from 1915 to 1997, 83 years of record.
0 records set at Blackburn still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Blackburn set a daily record precipitation of 13.0 mm (0.5 in) on 29 June 1997.

About the Station

Location: South Africa, -29.68 latitude, 31.08 longitude.
Elevation: 15 m (49 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 Blackburn. 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 Blackburn, 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 Blackburn still stand.

Wettest Day of Each Month

Oct: 290.3 mm (11.4 in)

The wettest day on record for each calendar month at Blackburn. The most was 290.3 mm (11.4 in) on 27 October 1915.

Record daily precipitation for each month at Blackburn
Month	Record daily precipitation (mm)	Date
Jan	222.3 mm (8.8 in)	28 January 1920
Feb	182.9 mm (7.2 in)	15 February 1918
Mar	140.5 mm (5.5 in)	8 March 1919
Apr	119.0 mm (4.7 in)	28 April 1957
May	180.0 mm (7.1 in)	4 May 1988
Jun	185.9 mm (7.3 in)	12 June 1935
Jul	104.1 mm (4.1 in)	21 July 1917
Aug	92.7 mm (3.6 in)	9 August 1968
Sep	173.0 mm (6.8 in)	7 September 1980
Oct	290.3 mm (11.4 in)	27 October 1915
Nov	114.3 mm (4.5 in)	19 November 1921
Dec	101.0 mm (4.0 in)	24 December 1983

Latest Records

Latest records at Blackburn
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 June 1997	Blackburn, ZA	daily rain	13.0 mm (0.5 in)	9.2 mm (0.36 in)	50 years	20 of 100 (Routine)
28 June 1997	Blackburn, ZA	daily rain	26.5 mm (1.0 in)	6.2 mm (0.24 in)	34 years	21 of 100 (Routine)
19 April 1997	Blackburn, ZA	daily rain	46.0 mm (1.8 in)	5.0 mm (0.20 in)	36 years	21 of 100 (Routine)
4 January 1997	Blackburn, ZA	daily rain	97.0 mm (3.8 in)	41.1 mm (1.6 in)	72 years	52 of 100 (Notable)
8 July 1996	Blackburn, ZA	daily rain	31.0 mm (1.2 in)	1.8 mm (0.07 in)	58 years	26 of 100 (Routine)
7 July 1996	Blackburn, ZA	daily rain	75.0 mm (3.0 in)	45.8 mm (1.8 in)	61 years	57 of 100 (Notable)
6 July 1996	Blackburn, ZA	daily rain	90.0 mm (3.5 in)	65.0 mm (2.6 in)	5 years	49 of 100 (Notable)
10 February 1996	Blackburn, ZA	daily rain	105.0 mm (4.1 in)	70.5 mm (2.8 in)	34 years	49 of 100 (Notable)
26 January 1996	Blackburn, ZA	daily rain	70.0 mm (2.8 in)	18.0 mm (0.7 in)	20 years	24 of 100 (Routine)
12 January 1996	Blackburn, ZA	daily rain	129.0 mm (5.1 in)	87.0 mm (3.4 in)	12 years	51 of 100 (Notable)
17 December 1995	Blackburn, ZA	daily rain	76.0 mm (3.0 in)	43.0 mm (1.7 in)	41 years	52 of 100 (Notable)
18 November 1995	Blackburn, ZA	daily rain	36.4 mm (1.4 in)	11.4 mm (0.4 in)	16 years	22 of 100 (Routine)
14 October 1995	Blackburn, ZA	daily rain	33.8 mm (1.3 in)	9.2 mm (0.36 in)	52 years	27 of 100 (Routine)
12 July 1995	Blackburn, ZA	daily rain	4.5 mm (0.18 in)	3.0 mm (0.12 in)	6 years	12 of 100 (Routine)
2 May 1995	Blackburn, ZA	daily rain	25.0 mm (1.0 in)	11.3 mm (0.4 in)	44 years	26 of 100 (Routine)
9 April 1995	Blackburn, ZA	daily rain	51.0 mm (2.0 in)	18.0 mm (0.7 in)	10 years	22 of 100 (Routine)
22 March 1995	Blackburn, ZA	daily rain	130.0 mm (5.1 in)	37.0 mm (1.5 in)	4 years	28 of 100 (Routine)
25 December 1994	Blackburn, ZA	daily rain	58.0 mm (2.3 in)	24.2 mm (1.0 in)	65 years	45 of 100 (Notable)
12 October 1994	Blackburn, ZA	daily rain	60.0 mm (2.4 in)	24.4 mm (1.0 in)	51 years	35 of 100 (Notable)
24 July 1994	Blackburn, ZA	daily rain	24.5 mm (1.0 in)	16.4 mm (0.6 in)	76 years	20 of 100 (Routine)

Extremes by Year

1915 to 1997

Yearly extremes at Blackburn: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	290.3 mm (11.4 in)	1915	78.7 mm (3.1 in)	83
Wettest five days (Rx5day)	523.0 mm (20.6 in)	1917	121.2 mm (4.8 in)	83
Longest dry spell (CDD)	86 days	1992	36 days	83

Wettest day (Rx1day)

The wettest day of the year at Blackburn, 1915 to 1997. The record is 290.3 mm (11.4 in) in 1915, marked on the chart; the median year is 78.7 mm (3.1 in).

Wettest day (Rx1day) at Blackburn by year
Year	Wettest day (Rx1day)
1915	290.3 mm (11.4 in)
1916	63.5 mm (2.5 in)
1917	273.1 mm (10.8 in)
1918	182.9 mm (7.2 in)
1919	140.5 mm (5.5 in)
1920	222.3 mm (8.8 in)
1921	114.3 mm (4.5 in)
1922	77.5 mm (3.1 in)
1923	44.5 mm (1.8 in)
1924	55.1 mm (2.2 in)
1925	78.7 mm (3.1 in)
1926	67.3 mm (2.6 in)
1927	78.7 mm (3.1 in)
1928	40.1 mm (1.6 in)
1929	87.1 mm (3.4 in)
1930	74.9 mm (2.9 in)
1931	48.3 mm (1.9 in)
1932	174.8 mm (6.9 in)
1933	54.6 mm (2.1 in)
1934	54.4 mm (2.1 in)
1935	185.9 mm (7.3 in)
1936	121.9 mm (4.8 in)
1937	88.9 mm (3.5 in)
1938	52.1 mm (2.1 in)
1939	100.3 mm (3.9 in)
1940	162.6 mm (6.4 in)
1941	44.5 mm (1.8 in)
1942	61.7 mm (2.4 in)
1943	88.9 mm (3.5 in)
1944	61.0 mm (2.4 in)
1945	57.2 mm (2.3 in)
1946	58.7 mm (2.3 in)
1947	71.9 mm (2.8 in)
1948	74.9 mm (2.9 in)
1949	70.9 mm (2.8 in)
1950	53.8 mm (2.1 in)
1951	45.7 mm (1.8 in)
1952	80.0 mm (3.1 in)
1953	40.6 mm (1.6 in)
1954	95.5 mm (3.8 in)
1955	100.0 mm (3.9 in)
1956	68.0 mm (2.7 in)
1957	119.0 mm (4.7 in)
1958	90.0 mm (3.5 in)
1959	75.0 mm (3.0 in)
1960	61.0 mm (2.4 in)
1961	72.5 mm (2.9 in)
1962	57.0 mm (2.2 in)
1963	47.0 mm (1.9 in)
1964	108.0 mm (4.3 in)
1965	76.0 mm (3.0 in)
1966	40.7 mm (1.6 in)
1967	70.0 mm (2.8 in)
1968	92.7 mm (3.6 in)
1969	76.9 mm (3.0 in)
1970	51.5 mm (2.0 in)
1971	98.5 mm (3.9 in)
1972	52.0 mm (2.0 in)
1973	62.0 mm (2.4 in)
1974	159.0 mm (6.3 in)
1975	71.0 mm (2.8 in)
1976	135.5 mm (5.3 in)
1977	134.0 mm (5.3 in)
1978	82.0 mm (3.2 in)
1979	51.0 mm (2.0 in)
1980	173.0 mm (6.8 in)
1981	81.0 mm (3.2 in)
1982	43.5 mm (1.7 in)
1983	101.0 mm (4.0 in)
1984	103.8 mm (4.1 in)
1985	156.0 mm (6.1 in)
1986	95.9 mm (3.8 in)
1987	162.0 mm (6.4 in)
1988	180.0 mm (7.1 in)
1989	117.0 mm (4.6 in)
1990	85.0 mm (3.3 in)
1991	110.0 mm (4.3 in)
1992	38.5 mm (1.5 in)
1993	80.5 mm (3.2 in)
1994	67.5 mm (2.7 in)
1995	130.0 mm (5.1 in)
1996	129.0 mm (5.1 in)
1997	97.0 mm (3.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Blackburn, 1915 to 1997. The record is 523.0 mm (20.6 in) in 1917, marked on the chart; the median year is 121.2 mm (4.8 in).

Wettest five days (Rx5day) at Blackburn by year
Year	Wettest five days (Rx5day)
1915	290.3 mm (11.4 in)
1916	78.7 mm (3.1 in)
1917	523.0 mm (20.6 in)
1918	231.2 mm (9.1 in)
1919	157.0 mm (6.2 in)
1920	284.5 mm (11.2 in)
1921	119.4 mm (4.7 in)
1922	121.2 mm (4.8 in)
1923	104.2 mm (4.1 in)
1924	91.4 mm (3.6 in)
1925	242.8 mm (9.6 in)
1926	67.3 mm (2.6 in)
1927	170.4 mm (6.7 in)
1928	63.3 mm (2.5 in)
1929	138.6 mm (5.5 in)
1930	75.9 mm (3.0 in)
1931	93.2 mm (3.7 in)
1932	220.5 mm (8.7 in)
1933	86.1 mm (3.4 in)
1934	90.9 mm (3.6 in)
1935	383.5 mm (15.1 in)
1936	183.8 mm (7.2 in)
1937	145.8 mm (5.7 in)
1938	80.2 mm (3.2 in)
1939	158.7 mm (6.2 in)
1940	175.0 mm (6.9 in)
1941	64.1 mm (2.5 in)
1942	83.1 mm (3.3 in)
1943	130.0 mm (5.1 in)
1944	131.6 mm (5.2 in)
1945	135.9 mm (5.4 in)
1946	117.6 mm (4.6 in)
1947	117.1 mm (4.6 in)
1948	122.6 mm (4.8 in)
1949	98.8 mm (3.9 in)
1950	87.0 mm (3.4 in)
1951	101.6 mm (4.0 in)
1952	80.0 mm (3.1 in)
1953	89.4 mm (3.5 in)
1954	169.4 mm (6.7 in)
1955	169.7 mm (6.7 in)
1956	130.7 mm (5.1 in)
1957	214.0 mm (8.4 in)
1958	231.5 mm (9.1 in)
1959	81.0 mm (3.2 in)
1960	68.0 mm (2.7 in)
1961	131.5 mm (5.2 in)
1962	109.5 mm (4.3 in)
1963	91.7 mm (3.6 in)
1964	166.4 mm (6.6 in)
1965	121.5 mm (4.8 in)
1966	79.6 mm (3.1 in)
1967	101.8 mm (4.0 in)
1968	143.3 mm (5.6 in)
1969	106.5 mm (4.2 in)
1970	93.5 mm (3.7 in)
1971	151.5 mm (6.0 in)
1972	93.5 mm (3.7 in)
1973	105.5 mm (4.2 in)
1974	241.8 mm (9.5 in)
1975	107.0 mm (4.2 in)
1976	270.5 mm (10.6 in)
1977	248.5 mm (9.8 in)
1978	113.0 mm (4.4 in)
1979	69.0 mm (2.7 in)
1980	246.0 mm (9.7 in)
1981	128.1 mm (5.0 in)
1982	87.0 mm (3.4 in)
1983	101.0 mm (4.0 in)
1984	230.4 mm (9.1 in)
1985	307.5 mm (12.1 in)
1986	120.1 mm (4.7 in)
1987	187.0 mm (7.4 in)
1988	270.0 mm (10.6 in)
1989	233.0 mm (9.2 in)
1990	90.5 mm (3.6 in)
1991	146.0 mm (5.7 in)
1992	84.0 mm (3.3 in)
1993	108.5 mm (4.3 in)
1994	92.5 mm (3.6 in)
1995	174.0 mm (6.9 in)
1996	198.0 mm (7.8 in)
1997	109.0 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Blackburn, 1915 to 1997. The record is 86 days in 1992, marked on the chart; the median year is 36 days.

Longest dry spell (CDD) at Blackburn by year
Year	Longest dry spell (CDD)
1915	15 days
1916	83 days
1917	15 days
1918	26 days
1919	31 days
1920	45 days
1921	27 days
1922	29 days
1923	40 days
1924	29 days
1925	39 days
1926	41 days
1927	52 days
1928	37 days
1929	38 days
1930	17 days
1931	28 days
1932	31 days
1933	47 days
1934	38 days
1935	23 days
1936	53 days
1937	29 days
1938	29 days
1939	34 days
1940	50 days
1941	28 days
1942	25 days
1943	17 days
1944	42 days
1945	48 days
1946	46 days
1947	23 days
1948	51 days
1949	56 days
1950	49 days
1951	33 days
1952	28 days
1953	58 days
1954	19 days
1955	29 days
1956	21 days
1957	22 days
1958	26 days
1959	50 days
1960	40 days
1961	40 days
1962	43 days
1963	33 days
1964	37 days
1965	26 days
1966	27 days
1967	43 days
1968	53 days
1969	22 days
1970	37 days
1971	33 days
1972	25 days
1973	40 days
1974	39 days
1975	40 days
1976	64 days
1977	39 days
1978	24 days
1979	21 days
1980	41 days
1981	32 days
1982	49 days
1983	21 days
1984	34 days
1985	57 days
1986	56 days
1987	35 days
1988	35 days
1989	47 days
1990	36 days
1991	29 days
1992	86 days
1993	45 days
1994	36 days
1995	36 days
1996	34 days
1997	17 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

78 years, 1917 to 1996

A day with at least 80.7 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 278.2 mm (11.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Blackburn: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	80.7 mm (3.2 in)
5 years	119.4 mm (4.7 in)
10 years	150.0 mm (5.9 in)
25 years	195.1 mm (7.7 in)
50 years	234.1 mm (9.2 in)
100 years	278.2 mm (11.0 in)	Longer than the 78 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, 78 years of values from 1917 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: 273.1 mm (10.8 in) in 1917; 222.3 mm (8.8 in) in 1920; 185.9 mm (7.3 in) in 1935.

Download the Data

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