Weather Records on 21 May 1966

296 weather records were set or tied worldwide on 21 May 1966. Highest significance: Paradis 7 S, US.

Key Facts for 21 May 1966

On 21 May 1966, 296 weather records were set or tied at long-record stations worldwide.
112 were record highs and 32 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 8 monthly and 288 daily.
Paradis 7 S set a daily record precipitation of 210.8 mm (8.3 in) on 21 May 1966.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 461 records.

Record Map

296 stations

296 station records on 21 May 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Paradis 7 S	United States	Record daily precipitation	210.8 mm (8.3 in)	54 of 100 (Notable)
Bizana (Bos)	South Africa	Record daily precipitation	157.0 mm (6.2 in)	51 of 100 (Notable)
Sihota	South Africa	Record daily precipitation	68.5 mm (2.7 in)	47 of 100 (Notable)
Notinsila (Bos)	South Africa	Record daily precipitation	64.5 mm (2.5 in)	44 of 100 (Notable)
Ingenio Tamazula	Mexico	Record daily precipitation	69.6 mm (2.7 in)	43 of 100 (Notable)
Dwtn Charleston	United States	Record daily precipitation	57.4 mm (2.3 in)	43 of 100 (Notable)
Sydney (Observatory Hill)	Australia	Record daily precipitation	50.0 mm (2.0 in)	40 of 100 (Notable)
Hope A	Canada	Record daily precipitation	38.1 mm (1.5 in)	40 of 100 (Notable)
Sedgwick	United States	Record daily precipitation	63.0 mm (2.5 in)	40 of 100 (Notable)
Stewarts Brook Composite	Australia	Record daily precipitation	38.1 mm (1.5 in)	39 of 100 (Notable)
Itapage	Brazil	Record daily precipitation	36.0 mm (1.4 in)	38 of 100 (Notable)
Hambantota	Sri Lanka	Record high minimum temperature	26.9 C (80.4 F)	38 of 100 (Notable)
Eskdalemuir	United Kingdom	Record daily precipitation	33.9 mm (1.3 in)	37 of 100 (Notable)
Belltrees Homestead	Australia	Record daily precipitation	30.0 mm (1.2 in)	36 of 100 (Notable)
Atchafalaya	United States	Record daily precipitation	81.0 mm (3.2 in)	36 of 100 (Notable)
Bridgeport	United States	Record daily precipitation	65.8 mm (2.6 in)	36 of 100 (Notable)
Ville Platte	United States	Record daily precipitation	79.0 mm (3.1 in)	35 of 100 (Notable)
Madisonville	United States	Record daily precipitation	28.4 mm (1.1 in)	35 of 100 (Notable)
Randwick Bowling Club	Australia	Record daily precipitation	59.2 mm (2.3 in)	34 of 100 (Routine)
Tonti (Bos)	South Africa	Record daily precipitation	136.0 mm (5.4 in)	34 of 100 (Routine)
Rayne 6 N	United States	Record daily precipitation	61.0 mm (2.4 in)	34 of 100 (Routine)
Bai'tyk	Kyrgyzstan	Record daily precipitation	27.0 mm (1.1 in)	33 of 100 (Routine)
Schriever	United States	Record daily precipitation	124.5 mm (4.9 in)	33 of 100 (Routine)
Hennessey 4 ESE	United States	Record daily precipitation	52.1 mm (2.1 in)	33 of 100 (Routine)
Winnemucca AP	United States	Record high minimum temperature	13.9 C (57.0 F)	33 of 100 (Routine)
Singleton Post Office	Australia	Record daily precipitation	25.1 mm (1.0 in)	32 of 100 (Routine)
Broke (Harrowby)	Australia	Record daily precipitation	26.2 mm (1.0 in)	32 of 100 (Routine)
Durham	United States	Record daily precipitation	56.9 mm (2.2 in)	32 of 100 (Routine)
Long Lake 5 SW	United States	Record daily precipitation	44.5 mm (1.8 in)	32 of 100 (Routine)
Sydney Botanic Gardens	Australia	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Feiticeiro	Brazil	Record daily precipitation	57.2 mm (2.3 in)	30 of 100 (Routine)
Almaty	Kazakhstan	Record daily precipitation	31.2 mm (1.2 in)	30 of 100 (Routine)
Bokfontein, Franklin	South Africa	Record daily precipitation	44.2 mm (1.7 in)	29 of 100 (Routine)
Tallulah	United States	Record daily precipitation	37.8 mm (1.5 in)	28 of 100 (Routine)
Dohne (Sar)	South Africa	Record daily precipitation	28.0 mm (1.1 in)	27 of 100 (Routine)
Orange	United States	Record daily precipitation	100.3 mm (3.9 in)	27 of 100 (Routine)
Artik	Armenia	Record daily precipitation	28.5 mm (1.1 in)	26 of 100 (Routine)
Centennial Park	Australia	Record daily precipitation	63.5 mm (2.5 in)	26 of 100 (Routine)
Mamanguape	Brazil	Record daily precipitation	115.3 mm (4.5 in)	26 of 100 (Routine)
Acude Coremas	Brazil	Record daily precipitation	28.8 mm (1.1 in)	26 of 100 (Routine)
Port Alfred	South Africa	Record daily precipitation	37.0 mm (1.5 in)	26 of 100 (Routine)
Palmiet, Kokstad	South Africa	Record daily precipitation	40.6 mm (1.6 in)	26 of 100 (Routine)
Tanjavur	India	Record daily precipitation	37.5 mm (1.5 in)	25 of 100 (Routine)
Three Rivers Ed Ph 2	United States	Record high minimum temperature	18.3 C (64.9 F)	25 of 100 (Routine)
Hugoton	United States	Record high maximum temperature	35.0 C (95.0 F)	25 of 100 (Routine)
Beaufort Wwtp	United States	Record daily precipitation	77.5 mm (3.1 in)	25 of 100 (Routine)
Port Townsend	United States	Record low minimum temperature	3.3 C (37.9 F)	25 of 100 (Routine)
Branxton (Dalwood Vineyard)	Australia	Record daily precipitation	35.6 mm (1.4 in)	24 of 100 (Routine)
Joe Rich Creek	Canada	Record daily snowfall	5.1 cm (2.0 in)	24 of 100 (Routine)
Sierraville Rs	United States	Record high minimum temperature	8.9 C (48.0 F)	24 of 100 (Routine)
Anadarko 3 E	United States	Record daily precipitation	44.2 mm (1.7 in)	24 of 100 (Routine)
Mtn View 91	United States	Record high maximum temperature	28.9 C (84.0 F)	24 of 100 (Routine)
Salva Vidas	Brazil	Record daily precipitation	42.6 mm (1.7 in)	23 of 100 (Routine)
Papane (Bos)	South Africa	Record daily precipitation	70.5 mm (2.8 in)	23 of 100 (Routine)
Riverview Observatory	Australia	Record daily precipitation	39.6 mm (1.6 in)	22 of 100 (Routine)
Fernie	Canada	Record high minimum temperature	11.7 C (53.1 F)	22 of 100 (Routine)
Peddie (Mag)	South Africa	Record daily precipitation	37.4 mm (1.5 in)	22 of 100 (Routine)
Quixeramobim	Brazil	Record daily precipitation	43.5 mm (1.7 in)	21 of 100 (Routine)
Boqueirao Pedras Brancas	Brazil	Record daily precipitation	42.3 mm (1.7 in)	21 of 100 (Routine)
Acude Riacho Do Sangue	Brazil	Record daily precipitation	46.9 mm (1.8 in)	21 of 100 (Routine)

Counts by Type and Timescale

296 records

Records set or tied on 21 May 1966 by type: Highest daily maximum 62, Lowest daily maximum 20, Highest daily minimum 50, Lowest daily minimum 12, Heaviest daily rainfall 149, Heaviest daily snowfall 3.

Records on 21 May 1966 by type
Record type	Records
Highest daily maximum	62
Lowest daily maximum	20
Highest daily minimum	50
Lowest daily minimum	12
Heaviest daily rainfall	149
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 21 May 1966 by timescale: all-time 0, monthly 8, daily 288.

How Much Records Were Beaten By

222 broken records

Margins by which the 222 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 132.1. Ties are not counted.

Top 20 by Significance

21 May 1966

Top 20 records on 21 May 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1966	Paradis 7 S, US	daily rain	210.8 mm (8.3 in)	132.1 mm (5.2 in)	32 years	54 of 100 (Notable)
21 May 1966	Bizana (Bos), ZA	daily rain	157.0 mm (6.2 in)	125.5 mm (4.9 in)	20 years	51 of 100 (Notable)
21 May 1966	Sihota, ZA	daily rain	68.5 mm (2.7 in)	66.5 mm (2.6 in)	7 years	47 of 100 (Notable)
21 May 1966	Notinsila (Bos), ZA	daily rain	64.5 mm (2.5 in)	57.1 mm (2.2 in)	27 years	44 of 100 (Notable)
21 May 1966	Ingenio Tamazula, MX	monthly rain	69.6 mm (2.7 in)	17.8 mm (0.7 in)	39 years	43 of 100 (Notable)
21 May 1966	Dwtn Charleston, US	daily rain	57.4 mm (2.3 in)	32.8 mm (1.3 in)	41 years	43 of 100 (Notable)
21 May 1966	Sydney (Observatory Hill), AU	daily rain	50.0 mm (2.0 in)	9.9 mm (0.39 in)	83 years	40 of 100 (Notable)
21 May 1966	Hope A, CA	monthly rain	38.1 mm (1.5 in)	10.2 mm (0.4 in)	26 years	40 of 100 (Notable)
21 May 1966	Sedgwick, US	daily rain	63.0 mm (2.5 in)	35.8 mm (1.4 in)	28 years	40 of 100 (Notable)
21 May 1966	Stewarts Brook Composite, AU	daily rain	38.1 mm (1.5 in)	21.1 mm (0.8 in)	63 years	39 of 100 (Notable)
21 May 1966	Itapage, BR	daily rain	36.0 mm (1.4 in)	23.0 mm (0.9 in)	48 years	38 of 100 (Notable)
21 May 1966	Hambantota, LK	daily high min	26.9 C (80.4 F)	0.2 C (0.4 F)	93 years	38 of 100 (Notable)
21 May 1966	Eskdalemuir, GB	daily rain	33.9 mm (1.3 in)	17.3 mm (0.7 in)	28 years	37 of 100 (Notable)
21 May 1966	Belltrees Homestead, AU	daily rain	30.0 mm (1.2 in)	12.2 mm (0.5 in)	63 years	36 of 100 (Notable)
21 May 1966	Atchafalaya, US	daily rain	81.0 mm (3.2 in)	60.7 mm (2.4 in)	35 years	36 of 100 (Notable)
21 May 1966	Bridgeport, US	daily rain	65.8 mm (2.6 in)	32.8 mm (1.3 in)	43 years	36 of 100 (Notable)
21 May 1966	Ville Platte, US	daily rain	79.0 mm (3.1 in)	53.6 mm (2.1 in)	32 years	35 of 100 (Notable)
21 May 1966	Madisonville, US	daily rain	28.4 mm (1.1 in)	28.4 mm (1.1 in)	47 years	35 of 100 (Notable)
21 May 1966	Randwick Bowling Club, AU	daily rain	59.2 mm (2.3 in)	23.1 mm (0.9 in)	52 years	34 of 100 (Routine)
21 May 1966	Tonti (Bos), ZA	daily rain	136.0 mm (5.4 in)	47.8 mm (1.9 in)	12 years	34 of 100 (Routine)

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

1793 to 1966

Records set or tied on this calendar date in each year from 1793 to 1966. 1966 had 296 records.

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

Records on 05-21 in each year
Year	Records
1793	1
1795	1
1811	1
1837	2
1842	1
1847	2
1854	1
1857	1
1858	1
1865	1
1866	1
1870	2
1875	1
1876	1
1880	2
1882	1
1885	1
1886	2
1887	3
1889	5
1890	3
1891	6
1892	1
1893	1
1894	4
1895	4
1896	5
1897	2
1898	1
1899	5
1900	1
1901	3
1902	4
1903	26
1904	8
1905	7
1906	12
1907	36
1908	13
1909	13
1910	14
1911	87
1912	24
1913	13
1914	26
1915	24
1916	13
1917	76
1918	51
1919	170
1920	39
1921	158
1922	39
1923	125
1924	148
1925	250
1926	221
1927	207
1928	173
1929	247
1930	133
1931	488
1932	343
1933	290
1934	590
1935	190
1936	328
1937	227
1938	348
1939	355
1940	456
1941	525
1942	482
1943	463
1944	310
1945	515
1946	324
1947	485
1948	312
1949	593
1950	403
1951	271
1952	385
1953	501
1954	961
1955	507
1956	409
1957	709
1958	511
1959	684
1960	615
1961	306
1962	553
1963	598
1964	788
1965	238
1966	296
1967	1,022
1968	549
1969	832
1970	449
1971	536
1972	557
1973	493
1974	847
1975	1,160
1976	393
1977	756
1978	575
1979	787
1980	857
1981	1,550
1982	599
1983	1,106
1984	950
1985	610
1986	908
1987	1,242
1988	819
1989	671
1990	947
1991	1,065
1992	1,143
1993	1,197
1994	656
1995	749
1996	1,461
1997	953
1998	1,200
1999	544
2000	897
2001	1,187
2002	2,048
2003	807
2004	898
2005	1,020
2006	810
2007	894
2008	740
2009	1,315
2010	962
2011	959
2012	848
2013	884
2014	522
2015	956
2016	567
2017	780
2018	525
2019	1,668
2020	707
2021	1,131
2022	1,512
2023	794
2024	751
2025	776
2026	356

Download the Data

Data for records on 1966-05-21: 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 20	189
20 to 40	21
40 to 60	7
60 to 80	3
80 to 100	0
100 to 120	0
120 to 140	2