Uniondale (Tnk) Weather Records (SF000302190)

Record envelope, standing records and threshold days for Uniondale (Tnk) (SF000302190), South Africa, with 102 years of record.

Key Facts for Uniondale (Tnk)

Uniondale (Tnk) (SF000302190) is a weather station in South Africa at -33.67 latitude and 23.13 longitude, 730 m (2,395 ft) above sea level.
The station reports from 1878 to 1979, 102 years of record.
0 records set at Uniondale (Tnk) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Uniondale (Tnk) set a daily record precipitation of 27.6 mm (1.1 in) on 1 September 1978.

About the Station

Location: South Africa, -33.67 latitude, 23.13 longitude.
Elevation: 730 m (2,395 ft).
Period of record: 1878 to 1979, 102 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 Uniondale (Tnk). 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 Uniondale (Tnk), 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 Uniondale (Tnk) still stand.

Wettest Day of Each Month

Aug: 121.9 mm (4.8 in)

The wettest day on record for each calendar month at Uniondale (Tnk). The most was 121.9 mm (4.8 in) on 30 August 1888.

Record daily precipitation for each month at Uniondale (Tnk)
Month	Record daily precipitation (mm)	Date
Jan	62.5 mm (2.5 in)	18 January 1962
Feb	53.3 mm (2.1 in)	25 February 1886
Mar	66.5 mm (2.6 in)	22 March 1902
Apr	66.0 mm (2.6 in)	9 April 1908
May	103.6 mm (4.1 in)	15 May 1885
Jun	38.4 mm (1.5 in)	11 June 1890
Jul	82.8 mm (3.3 in)	14 July 1886
Aug	121.9 mm (4.8 in)	30 August 1888
Sep	97.0 mm (3.8 in)	12 September 1905
Oct	55.8 mm (2.2 in)	20 October 1953
Nov	67.6 mm (2.7 in)	13 November 1891
Dec	59.5 mm (2.3 in)	16 December 1965

Latest Records

Latest records at Uniondale (Tnk)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 September 1978	Uniondale (Tnk), ZA	daily rain	27.6 mm (1.1 in)	13.1 mm (0.5 in)	9 years	24 of 100 (Routine)
23 August 1978	Uniondale (Tnk), ZA	daily rain	39.7 mm (1.6 in)	23.4 mm (0.9 in)	77 years	56 of 100 (Notable)
9 January 1978	Uniondale (Tnk), ZA	daily rain	43.5 mm (1.7 in)	29.5 mm (1.2 in)	74 years	64 of 100 (Major)
30 November 1977	Uniondale (Tnk), ZA	daily rain	18.3 mm (0.7 in)	1.8 mm (0.07 in)	70 years	20 of 100 (Routine)
8 May 1977	Uniondale (Tnk), ZA	daily rain	16.0 mm (0.6 in)	1.5 mm (0.06 in)	82 years	20 of 100 (Routine)
13 April 1977	Uniondale (Tnk), ZA	daily rain	13.5 mm (0.5 in)	2.8 mm (0.11 in)	89 years	20 of 100 (Routine)
30 May 1976	Uniondale (Tnk), ZA	daily rain	39.0 mm (1.5 in)	22.0 mm (0.9 in)	11 years	34 of 100 (Routine)
25 November 1974	Uniondale (Tnk), ZA	daily rain	13.0 mm (0.5 in)	6.4 mm (0.25 in)	53 years	20 of 100 (Routine)
22 August 1974	Uniondale (Tnk), ZA	daily rain	58.0 mm (2.3 in)	33.9 mm (1.3 in)	35 years	52 of 100 (Notable)
24 December 1970	Uniondale (Tnk), ZA	daily rain	4.5 mm (0.18 in)	2.0 mm (0.08 in)	60 years	20 of 100 (Routine)
6 December 1970	Uniondale (Tnk), ZA	daily rain	12.0 mm (0.5 in)	4.9 mm (0.19 in)	44 years	20 of 100 (Routine)
16 June 1969	Uniondale (Tnk), ZA	daily rain	31.0 mm (1.2 in)	0.5 mm (0.02 in)	56 years	26 of 100 (Routine)
1 September 1968	Uniondale (Tnk), ZA	daily rain	14.5 mm (0.6 in)	8.7 mm (0.34 in)	39 years	20 of 100 (Routine)
8 August 1968	Uniondale (Tnk), ZA	daily rain	19.0 mm (0.7 in)	6.3 mm (0.25 in)	18 years	20 of 100 (Routine)
13 June 1968	Uniondale (Tnk), ZA	daily rain	16.0 mm (0.6 in)	2.2 mm (0.09 in)	10 years	15 of 100 (Routine)
12 June 1968	Uniondale (Tnk), ZA	daily rain	37.0 mm (1.5 in)	5.0 mm (0.20 in)	71 years	37 of 100 (Notable)
2 June 1968	Uniondale (Tnk), ZA	daily rain	38.0 mm (1.5 in)	27.8 mm (1.1 in)	83 years	74 of 100 (Major)
10 December 1967	Uniondale (Tnk), ZA	daily rain	15.0 mm (0.6 in)	9.9 mm (0.39 in)	37 years	20 of 100 (Routine)
23 November 1967	Uniondale (Tnk), ZA	daily rain	14.0 mm (0.6 in)	3.8 mm (0.15 in)	44 years	20 of 100 (Routine)
30 September 1967	Uniondale (Tnk), ZA	daily rain	8.0 mm (0.31 in)	0.4 mm (0.02 in)	34 years	19 of 100 (Routine)

Extremes by Year

1878 to 1979

Yearly extremes at Uniondale (Tnk): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	121.9 mm (4.8 in)	1888	38.1 mm (1.5 in)	101
Wettest five days (Rx5day)	157.7 mm (6.2 in)	1888	53.3 mm (2.1 in)	101
Longest dry spell (CDD)	123 days	1926	43 days	101

Wettest day (Rx1day)

The wettest day of the year at Uniondale (Tnk), 1878 to 1979. The record is 121.9 mm (4.8 in) in 1888, marked on the chart; the median year is 38.1 mm (1.5 in).

Wettest day (Rx1day) at Uniondale (Tnk) by year
Year	Wettest day (Rx1day)
1878	28.7 mm (1.1 in)
1879	33.0 mm (1.3 in)
1880	24.6 mm (1.0 in)
1881	44.5 mm (1.8 in)
1882	30.5 mm (1.2 in)
1883	34.3 mm (1.4 in)
1884	33.0 mm (1.3 in)
1885	103.6 mm (4.1 in)
1886	82.8 mm (3.3 in)
1887	44.5 mm (1.8 in)
1888	121.9 mm (4.8 in)
1889	30.7 mm (1.2 in)
1890	38.4 mm (1.5 in)
1891	67.6 mm (2.7 in)
1892	54.4 mm (2.1 in)
1893	24.6 mm (1.0 in)
1894	29.7 mm (1.2 in)
1895	26.2 mm (1.0 in)
1896	63.5 mm (2.5 in)
1897	56.6 mm (2.2 in)
1898	31.5 mm (1.2 in)
1899	26.2 mm (1.0 in)
1900	39.4 mm (1.6 in)
1901	47.5 mm (1.9 in)
1902	66.5 mm (2.6 in)
1903	24.6 mm (1.0 in)
1904	49.5 mm (1.9 in)
1905	97.0 mm (3.8 in)
1906	38.1 mm (1.5 in)
1907	53.3 mm (2.1 in)
1908	66.0 mm (2.6 in)
1909	31.8 mm (1.3 in)
1910	31.8 mm (1.3 in)
1911	33.8 mm (1.3 in)
1912	39.4 mm (1.6 in)
1913	45.7 mm (1.8 in)
1914	53.3 mm (2.1 in)
1915	19.1 mm (0.8 in)
1916	25.9 mm (1.0 in)
1917	56.4 mm (2.2 in)
1918	20.8 mm (0.8 in)
1919	23.9 mm (0.9 in)
1920	49.5 mm (1.9 in)
1921	32.5 mm (1.3 in)
1922	39.6 mm (1.6 in)
1923	44.5 mm (1.8 in)
1924	65.0 mm (2.6 in)
1925	50.8 mm (2.0 in)
1926	48.3 mm (1.9 in)
1927	25.4 mm (1.0 in)
1928	34.3 mm (1.4 in)
1929	58.4 mm (2.3 in)
1930	41.9 mm (1.6 in)
1931	59.7 mm (2.4 in)
1932	50.8 mm (2.0 in)
1933	27.9 mm (1.1 in)
1934	44.5 mm (1.8 in)
1935	101.6 mm (4.0 in)
1936	30.5 mm (1.2 in)
1937	23.9 mm (0.9 in)
1938	27.4 mm (1.1 in)
1939	36.8 mm (1.4 in)
1940	23.4 mm (0.9 in)
1941	31.5 mm (1.2 in)
1942	25.9 mm (1.0 in)
1943	50.8 mm (2.0 in)
1944	53.3 mm (2.1 in)
1945	64.8 mm (2.6 in)
1946	22.6 mm (0.9 in)
1947	34.8 mm (1.4 in)
1948	25.4 mm (1.0 in)
1949	34.3 mm (1.4 in)
1950	38.1 mm (1.5 in)
1951	61.7 mm (2.4 in)
1952	20.3 mm (0.8 in)
1953	55.8 mm (2.2 in)
1954	60.0 mm (2.4 in)
1955	42.7 mm (1.7 in)
1956	23.5 mm (0.9 in)
1957	26.2 mm (1.0 in)
1958	28.5 mm (1.1 in)
1959	49.0 mm (1.9 in)
1960	31.5 mm (1.2 in)
1961	29.5 mm (1.2 in)
1962	62.5 mm (2.5 in)
1963	60.0 mm (2.4 in)
1964	62.5 mm (2.5 in)
1965	59.5 mm (2.3 in)
1966	10.5 mm (0.4 in)
1967	48.0 mm (1.9 in)
1968	38.0 mm (1.5 in)
1969	31.0 mm (1.2 in)
1970	12.0 mm (0.5 in)
1971	13.0 mm (0.5 in)
1972	20.0 mm (0.8 in)
1974	58.0 mm (2.3 in)
1975	23.5 mm (0.9 in)
1976	39.0 mm (1.5 in)
1977	20.5 mm (0.8 in)
1978	43.5 mm (1.7 in)
1979	4.2 mm (0.17 in)

Wettest five days (Rx5day)

The wettest five days of the year at Uniondale (Tnk), 1878 to 1979. The record is 157.7 mm (6.2 in) in 1888, marked on the chart; the median year is 53.3 mm (2.1 in).

Wettest five days (Rx5day) at Uniondale (Tnk) by year
Year	Wettest five days (Rx5day)
1878	50.3 mm (2.0 in)
1879	53.3 mm (2.1 in)
1880	39.3 mm (1.5 in)
1881	76.0 mm (3.0 in)
1882	45.0 mm (1.8 in)
1883	45.0 mm (1.8 in)
1884	44.7 mm (1.8 in)
1885	133.6 mm (5.3 in)
1886	109.5 mm (4.3 in)
1887	91.7 mm (3.6 in)
1888	157.7 mm (6.2 in)
1889	51.0 mm (2.0 in)
1890	49.3 mm (1.9 in)
1891	89.0 mm (3.5 in)
1892	69.9 mm (2.8 in)
1893	54.4 mm (2.1 in)
1894	42.2 mm (1.7 in)
1895	67.6 mm (2.7 in)
1896	73.6 mm (2.9 in)
1897	81.0 mm (3.2 in)
1898	40.9 mm (1.6 in)
1899	42.2 mm (1.7 in)
1900	44.5 mm (1.8 in)
1901	67.8 mm (2.7 in)
1902	82.7 mm (3.3 in)
1903	27.6 mm (1.1 in)
1904	95.3 mm (3.8 in)
1905	144.8 mm (5.7 in)
1906	43.7 mm (1.7 in)
1907	53.3 mm (2.1 in)
1908	88.7 mm (3.5 in)
1909	48.3 mm (1.9 in)
1910	52.9 mm (2.1 in)
1911	58.9 mm (2.3 in)
1912	52.9 mm (2.1 in)
1913	46.2 mm (1.8 in)
1914	80.8 mm (3.2 in)
1915	31.8 mm (1.3 in)
1916	28.7 mm (1.1 in)
1917	71.8 mm (2.8 in)
1918	33.3 mm (1.3 in)
1919	31.5 mm (1.2 in)
1920	69.3 mm (2.7 in)
1921	62.4 mm (2.5 in)
1922	41.7 mm (1.6 in)
1923	51.1 mm (2.0 in)
1924	66.0 mm (2.6 in)
1925	72.9 mm (2.9 in)
1926	49.8 mm (2.0 in)
1927	53.3 mm (2.1 in)
1928	59.7 mm (2.4 in)
1929	68.1 mm (2.7 in)
1930	64.8 mm (2.6 in)
1931	76.3 mm (3.0 in)
1932	127.1 mm (5.0 in)
1933	64.7 mm (2.5 in)
1934	62.3 mm (2.5 in)
1935	135.1 mm (5.3 in)
1936	53.4 mm (2.1 in)
1937	29.4 mm (1.2 in)
1938	38.0 mm (1.5 in)
1939	67.7 mm (2.7 in)
1940	41.4 mm (1.6 in)
1941	53.1 mm (2.1 in)
1942	39.9 mm (1.6 in)
1943	52.1 mm (2.1 in)
1944	87.5 mm (3.4 in)
1945	122.0 mm (4.8 in)
1946	38.4 mm (1.5 in)
1947	39.4 mm (1.6 in)
1948	48.2 mm (1.9 in)
1949	43.2 mm (1.7 in)
1950	68.0 mm (2.7 in)
1951	72.1 mm (2.8 in)
1952	43.7 mm (1.7 in)
1953	92.9 mm (3.7 in)
1954	86.5 mm (3.4 in)
1955	83.0 mm (3.3 in)
1956	42.2 mm (1.7 in)
1957	27.9 mm (1.1 in)
1958	31.9 mm (1.3 in)
1959	57.2 mm (2.3 in)
1960	44.5 mm (1.8 in)
1961	37.0 mm (1.5 in)
1962	90.5 mm (3.6 in)
1963	69.5 mm (2.7 in)
1964	84.0 mm (3.3 in)
1965	88.0 mm (3.5 in)
1966	19.5 mm (0.8 in)
1967	48.0 mm (1.9 in)
1968	83.5 mm (3.3 in)
1969	38.0 mm (1.5 in)
1970	25.5 mm (1.0 in)
1971	29.0 mm (1.1 in)
1972	25.0 mm (1.0 in)
1974	59.4 mm (2.3 in)
1975	26.7 mm (1.1 in)
1976	62.9 mm (2.5 in)
1977	61.5 mm (2.4 in)
1978	57.1 mm (2.2 in)
1979	4.2 mm (0.17 in)

Longest dry spell (CDD)

The longest dry spell of the year at Uniondale (Tnk), 1878 to 1979. The record is 123 days in 1926, marked on the chart; the median year is 43 days.

Longest dry spell (CDD) at Uniondale (Tnk) by year
Year	Longest dry spell (CDD)
1878	36 days
1879	36 days
1880	42 days
1881	25 days
1882	43 days
1883	42 days
1884	40 days
1885	47 days
1886	27 days
1887	38 days
1888	50 days
1889	57 days
1890	29 days
1891	35 days
1892	46 days
1893	40 days
1894	40 days
1895	50 days
1896	60 days
1897	48 days
1898	41 days
1899	44 days
1900	37 days
1901	40 days
1902	35 days
1903	77 days
1904	39 days
1905	53 days
1906	39 days
1907	77 days
1908	58 days
1909	52 days
1910	32 days
1911	45 days
1912	49 days
1913	30 days
1914	28 days
1915	43 days
1916	39 days
1917	34 days
1918	67 days
1919	40 days
1920	40 days
1921	61 days
1922	38 days
1923	30 days
1924	32 days
1925	49 days
1926	123 days
1927	58 days
1928	71 days
1929	41 days
1930	42 days
1931	61 days
1932	57 days
1933	53 days
1934	44 days
1935	44 days
1936	38 days
1937	41 days
1938	53 days
1939	30 days
1940	29 days
1941	43 days
1942	26 days
1943	40 days
1944	47 days
1945	50 days
1946	70 days
1947	57 days
1948	25 days
1949	49 days
1950	53 days
1951	37 days
1952	34 days
1953	31 days
1954	27 days
1955	33 days
1956	32 days
1957	33 days
1958	51 days
1959	24 days
1960	44 days
1961	33 days
1962	41 days
1963	64 days
1964	45 days
1965	62 days
1966	48 days
1967	44 days
1968	51 days
1969	51 days
1970	71 days
1971	66 days
1972	19 days
1974	44 days
1975	68 days
1976	35 days
1977	81 days
1978	74 days
1979	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

94 years, 1879 to 1978

A day with at least 38.6 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 110.4 mm (4.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Uniondale (Tnk): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.6 mm (1.5 in)
5 years	55.7 mm (2.2 in)
10 years	67.8 mm (2.7 in)
25 years	84.1 mm (3.3 in)
50 years	97.0 mm (3.8 in)
100 years	110.4 mm (4.3 in)	Longer than the 94 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, 94 years of values from 1879 to 1978.

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: 121.9 mm (4.8 in) in 1888; 103.6 mm (4.1 in) in 1885; 101.6 mm (4.0 in) in 1935.

Download the Data

Data for Uniondale (Tnk) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Uniondale (Tnk) 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