Weather Records on 12 May 1971

668 weather records were set or tied worldwide on 12 May 1971. Highest significance: Kwa-Mbonambi (Bos), ZA.

Key Facts for 12 May 1971

On 12 May 1971, 668 weather records were set or tied at long-record stations worldwide.
198 were record highs and 123 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 18 monthly and 645 daily.
Kwa-Mbonambi (Bos) set an all-time record daily precipitation of 415.5 mm (16.4 in) on 12 May 1971.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 451 records.

Record Map

668 stations

668 station records on 12 May 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kwa-Mbonambi (Bos)	South Africa	Record daily precipitation	415.5 mm (16.4 in)	66 of 100 (Major)
Kulu Halt	South Africa	Record daily precipitation	282.0 mm (11.1 in)	65 of 100 (Major)
Fairview	South Africa	Record daily precipitation	240.0 mm (9.4 in)	64 of 100 (Major)
Kangela, Mtubatuba	South Africa	Record daily precipitation	190.9 mm (7.5 in)	64 of 100 (Major)
Loch	Australia	Record daily precipitation	47.0 mm (1.9 in)	60 of 100 (Major)
Riverview	South Africa	Record daily precipitation	276.4 mm (10.9 in)	60 of 100 (Major)
Sulitjelma	Norway	Record daily precipitation	28.2 mm (1.1 in)	58 of 100 (Notable)
Windy Hill No.2	South Africa	Record daily precipitation	93.5 mm (3.7 in)	54 of 100 (Notable)
Amatikulu	South Africa	Record daily precipitation	363.0 mm (14.3 in)	53 of 100 (Notable)
Amatikulu(Mill)	South Africa	Record daily precipitation	266.7 mm (10.5 in)	52 of 100 (Notable)
Idria	United States	Record daily precipitation	29.0 mm (1.1 in)	52 of 100 (Notable)
Mount Narryer	Australia	Record daily precipitation	38.1 mm (1.5 in)	51 of 100 (Notable)
Intake	South Africa	Record daily precipitation	91.0 mm (3.6 in)	51 of 100 (Notable)
Tylertown 5ESE	United States	Record daily precipitation	162.6 mm (6.4 in)	51 of 100 (Notable)
Durban-Botanical Gardens	South Africa	Record daily precipitation	199.0 mm (7.8 in)	50 of 100 (Notable)
Jose de Freitas	Brazil	Record daily precipitation	85.4 mm (3.4 in)	49 of 100 (Notable)
Steigen	Norway	Record daily precipitation	25.0 mm (1.0 in)	49 of 100 (Notable)
Greenville	United States	Record daily precipitation	91.4 mm (3.6 in)	48 of 100 (Notable)
Wyelangta	Australia	Record daily precipitation	65.5 mm (2.6 in)	47 of 100 (Notable)
Natal Est, Mount Edg	South Africa	Record daily precipitation	209.3 mm (8.2 in)	46 of 100 (Notable)
Umlaas Waterworks	South Africa	Record daily precipitation	127.5 mm (5.0 in)	45 of 100 (Notable)
Sutherland	South Africa	Record daily precipitation	58.0 mm (2.3 in)	45 of 100 (Notable)
Merensky (Skl)	South Africa	Record daily precipitation	83.5 mm (3.3 in)	45 of 100 (Notable)
Glen Eland	South Africa	Record daily precipitation	101.5 mm (4.0 in)	43 of 100 (Notable)
Doornkop	South Africa	Record daily precipitation	189.0 mm (7.4 in)	43 of 100 (Notable)
Jabjur-In-Armenia	Armenia	Record daily precipitation	30.9 mm (1.2 in)	42 of 100 (Notable)
Tanhurst Est, Umzint	South Africa	Record daily precipitation	70.5 mm (2.8 in)	41 of 100 (Notable)
Chilliwack	Canada	Record high minimum temperature	15.0 C (59.0 F)	40 of 100 (Notable)
Fauquier	Canada	Record daily precipitation	25.4 mm (1.0 in)	40 of 100 (Notable)
Silvan	Australia	Record daily precipitation	44.2 mm (1.7 in)	39 of 100 (Notable)
Cooralya	Australia	Record daily precipitation	38.4 mm (1.5 in)	38 of 100 (Notable)
Greenwood	Canada	Record daily precipitation	31.2 mm (1.2 in)	38 of 100 (Notable)
Zwartrandjes	South Africa	Record daily precipitation	28.0 mm (1.1 in)	38 of 100 (Notable)
Amite	United States	Record daily precipitation	72.1 mm (2.8 in)	38 of 100 (Notable)
Boolathana	Australia	Record daily precipitation	45.7 mm (1.8 in)	37 of 100 (Notable)
Kranskop (Tnk)	South Africa	Record daily precipitation	97.5 mm (3.8 in)	37 of 100 (Notable)
Porto	Brazil	Record daily precipitation	87.4 mm (3.4 in)	36 of 100 (Notable)
Guerrero (Smn)	Mexico	Record low maximum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Botanic Gardens - Pmb	South Africa	Record daily precipitation	32.9 mm (1.3 in)	35 of 100 (Notable)
Louwsburg (Mag)	South Africa	Record daily precipitation	45.0 mm (1.8 in)	35 of 100 (Notable)
Yosemite Park HQ	United States	Record daily precipitation	48.3 mm (1.9 in)	35 of 100 (Notable)
Carville 2 SW	United States	Record daily precipitation	113.3 mm (4.5 in)	35 of 100 (Notable)
Muscle Shoals AP	United States	Record daily precipitation	56.9 mm (2.2 in)	35 of 100 (Notable)
Orebro	Sweden	Record high minimum temperature	9.4 C (48.9 F)	34 of 100 (Routine)
Marianna 2 S	United States	Record daily precipitation	41.7 mm (1.6 in)	34 of 100 (Routine)
Kipling 4 NNW	United States	Record daily precipitation	46.7 mm (1.8 in)	34 of 100 (Routine)
Woori Yallock	Australia	Record daily precipitation	28.7 mm (1.1 in)	33 of 100 (Routine)
Coranderrk Badger Weir	Australia	Record daily precipitation	43.9 mm (1.7 in)	33 of 100 (Routine)
Inchanga (Sar)	South Africa	Record daily precipitation	74.0 mm (2.9 in)	33 of 100 (Routine)
Mtunzini	South Africa	Record daily precipitation	202.9 mm (8.0 in)	33 of 100 (Routine)
Vryheid	South Africa	Record daily precipitation	34.0 mm (1.3 in)	33 of 100 (Routine)
Hammond	United States	Record daily precipitation	80.0 mm (3.1 in)	33 of 100 (Routine)
Kingston	United States	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Knoxville AP	United States	Record daily precipitation	42.4 mm (1.7 in)	33 of 100 (Routine)
Luroy	Norway	Record daily precipitation	77.8 mm (3.1 in)	32 of 100 (Routine)
Bridgeport 5 NW	United States	Record daily precipitation	49.3 mm (1.9 in)	32 of 100 (Routine)
Chatham Exp Fa	United States	Record daily snowfall	7.6 cm (3.0 in)	32 of 100 (Routine)
Brookhaven City	United States	Record daily precipitation	59.4 mm (2.3 in)	32 of 100 (Routine)
Mize 3SW	United States	Record daily precipitation	74.9 mm (2.9 in)	32 of 100 (Routine)
Tye Rvr 1 SE	United States	Record daily precipitation	50.8 mm (2.0 in)	32 of 100 (Routine)

Counts by Type and Timescale

668 records

Records set or tied on 12 May 1971 by type: Highest daily maximum 103, Lowest daily maximum 60, Highest daily minimum 95, Lowest daily minimum 63, Heaviest daily rainfall 326, Heaviest daily snowfall 18, Deepest snow cover 3.

Records on 12 May 1971 by type
Record type	Records
Highest daily maximum	103
Lowest daily maximum	60
Highest daily minimum	95
Lowest daily minimum	63
Heaviest daily rainfall	326
Heaviest daily snowfall	18
Deepest snow cover	3

Records on 12 May 1971 by timescale: all-time 5, monthly 18, daily 645.

How Much Records Were Beaten By

567 broken records

Margins by which the 567 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 176.1. Ties are not counted.

Top 20 by Significance

12 May 1971

Top 20 records on 12 May 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1971	Kwa-Mbonambi (Bos), ZA	all-time rain	415.5 mm (16.4 in)	75.5 mm (3.0 in)	7 years	66 of 100 (Major)
12 May 1971	Kulu Halt, ZA	monthly rain	282.0 mm (11.1 in)	176.1 mm (6.9 in)	35 years	65 of 100 (Major)
12 May 1971	Fairview, ZA	monthly rain	240.0 mm (9.4 in)	140.9 mm (5.5 in)	31 years	64 of 100 (Major)
12 May 1971	Kangela, Mtubatuba, ZA	monthly rain	190.9 mm (7.5 in)	63.4 mm (2.5 in)	31 years	64 of 100 (Major)
12 May 1971	Loch, AU	daily rain	47.0 mm (1.9 in)	26.7 mm (1.1 in)	60 years	60 of 100 (Major)
12 May 1971	Riverview, ZA	all-time rain	276.4 mm (10.9 in)	62.9 mm (2.5 in)	7 years	60 of 100 (Major)
12 May 1971	Sulitjelma, NO	daily rain	28.2 mm (1.1 in)	19.7 mm (0.8 in)	36 years	58 of 100 (Notable)
12 May 1971	Windy Hill No.2, ZA	daily rain	93.5 mm (3.7 in)	86.6 mm (3.4 in)	36 years	54 of 100 (Notable)
12 May 1971	Amatikulu, ZA	all-time rain	363.0 mm (14.3 in)	57.2 mm (2.3 in)	31 years	53 of 100 (Notable)
12 May 1971	Amatikulu(Mill), ZA	all-time rain	266.7 mm (10.5 in)	47.8 mm (1.9 in)	31 years	52 of 100 (Notable)
12 May 1971	Idria, US	daily rain	29.0 mm (1.1 in)	22.6 mm (0.9 in)	45 years	52 of 100 (Notable)
12 May 1971	Mount Narryer, AU	daily rain	38.1 mm (1.5 in)	37.1 mm (1.5 in)	46 years	51 of 100 (Notable)
12 May 1971	Intake, ZA	daily rain	91.0 mm (3.6 in)	73.7 mm (2.9 in)	36 years	51 of 100 (Notable)
12 May 1971	Tylertown 5ESE, US	daily rain	162.6 mm (6.4 in)	138.7 mm (5.5 in)	28 years	51 of 100 (Notable)
12 May 1971	Durban-Botanical Gardens, ZA	monthly rain	199.0 mm (7.8 in)	37.7 mm (1.5 in)	31 years	50 of 100 (Notable)
12 May 1971	Jose de Freitas, BR	daily rain	85.4 mm (3.4 in)	43.4 mm (1.7 in)	50 years	49 of 100 (Notable)
12 May 1971	Steigen, NO	daily rain	25.0 mm (1.0 in)	15.4 mm (0.6 in)	45 years	49 of 100 (Notable)
12 May 1971	Greenville, US	daily rain	91.4 mm (3.6 in)	66.5 mm (2.6 in)	16 years	48 of 100 (Notable)
12 May 1971	Wyelangta, AU	daily rain	65.5 mm (2.6 in)	45.7 mm (1.8 in)	28 years	47 of 100 (Notable)
12 May 1971	Natal Est, Mount Edg, ZA	monthly rain	209.3 mm (8.2 in)	48.0 mm (1.9 in)	31 years	46 of 100 (Notable)

Significance is a score from 0 to 100 combining margin, the age of the old record and the length of the station's record. How it is computed.

The Same Date in Other Years

1814 to 1971

Records set or tied on this calendar date in each year from 1814 to 1971. 1971 had 668 records.

Counts for years before the ledger starts come from the same station rules.

Records on 05-12 in each year
Year	Records
1814	2
1823	1
1825	1
1827	1
1834	1
1837	1
1838	1
1845	1
1847	1
1848	1
1849	2
1851	1
1855	2
1860	2
1862	2
1863	1
1867	1
1868	1
1872	2
1874	1
1877	1
1878	1
1879	1
1881	4
1882	5
1884	3
1885	2
1886	3
1887	1
1888	1
1889	1
1890	1
1891	4
1894	1
1895	1
1896	1
1897	7
1898	3
1900	3
1901	6
1902	5
1903	7
1904	11
1905	10
1906	20
1907	53
1908	12
1909	4
1910	9
1911	37
1912	46
1913	6
1914	36
1915	50
1916	42
1917	54
1918	113
1919	42
1920	19
1921	64
1922	43
1923	109
1924	245
1925	275
1926	121
1927	167
1928	192
1929	172
1930	500
1931	350
1932	199
1933	476
1934	293
1935	404
1936	329
1937	214
1938	394
1939	233
1940	440
1941	568
1942	418
1943	803
1944	368
1945	389
1946	653
1947	286
1948	390
1949	414
1950	283
1951	427
1952	711
1953	891
1954	305
1955	265
1956	1,568
1957	454
1958	714
1959	740
1960	1,583
1961	381
1962	713
1963	777
1964	401
1965	196
1966	909
1967	810
1968	890
1969	506
1970	698
1971	668
1972	641
1973	393
1974	702
1975	418
1976	541
1977	855
1978	802
1979	763
1980	684
1981	855
1982	763
1983	1,281
1984	887
1985	1,199
1986	473
1987	1,295
1988	619
1989	856
1990	617
1991	1,177
1992	1,022
1993	1,208
1994	738
1995	1,190
1996	1,420
1997	921
1998	1,576
1999	881
2000	1,486
2001	1,015
2002	1,027
2003	861
2004	1,054
2005	1,369
2006	797
2007	630
2008	858
2009	687
2010	1,250
2011	1,119
2012	660
2013	689
2014	949
2015	958
2016	421
2017	529
2018	819
2019	784
2020	1,338
2021	712
2022	1,930
2023	429
2024	447
2025	940
2026	1,110

Download the Data

Data for records on 1971-05-12: CSV or JSON. Field meanings are on the data page.

Sources: 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)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 25	516
25 to 50	33
50 to 75	8
75 to 100	6
100 to 125	0
125 to 150	3
150 to 175	0
175 to 200	1