Weather Records on 21 May 1957

709 weather records were set or tied worldwide on 21 May 1957. Highest significance: Willowmore, ZA.

Key Facts for 21 May 1957

On 21 May 1957, 709 weather records were set or tied at long-record stations worldwide.
131 were record highs and 315 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 8 monthly and 700 daily.
Willowmore set a daily record precipitation of 45.7 mm (1.8 in) on 21 May 1957.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 459 records.

Record Map

709 stations

709 station records on 21 May 1957 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1957: highest significance records shown on the map
Station	Country	Type	Value	Significance
Willowmore	South Africa	Record daily precipitation	45.7 mm (1.8 in)	61 of 100 (Major)
Kodanand	India	Record daily precipitation	178.3 mm (7.0 in)	60 of 100 (Major)
Grand Canyon HQ	United States	Record daily snowfall	20.3 cm (8.0 in)	60 of 100 (Major)
Neosho	United States	Record daily precipitation	126.2 mm (5.0 in)	51 of 100 (Notable)
Gravette	United States	Record daily precipitation	107.4 mm (4.2 in)	50 of 100 (Notable)
San Mateo	United States	Record daily precipitation	33.3 mm (1.3 in)	50 of 100 (Notable)
Mt Vernon 3 SW	United States	Record daily precipitation	95.8 mm (3.8 in)	49 of 100 (Notable)
Artichoke Lake 1 E	United States	Record daily precipitation	47.5 mm (1.9 in)	48 of 100 (Notable)
Virginia City	United States	Record daily snowfall	22.9 cm (9.0 in)	47 of 100 (Notable)
Kunda	Estonia	Record daily precipitation	35.2 mm (1.4 in)	46 of 100 (Notable)
Castelo Do Piaui (Marvao)	Brazil	Record daily precipitation	62.5 mm (2.5 in)	45 of 100 (Notable)
Denton	United States	Record daily precipitation	32.5 mm (1.3 in)	45 of 100 (Notable)
Hallock	United States	Record daily precipitation	35.6 mm (1.4 in)	44 of 100 (Notable)
Cedar Rapids #1	United States	Record daily precipitation	45.7 mm (1.8 in)	41 of 100 (Notable)
Schmidtsdrif	South Africa	Record daily precipitation	29.0 mm (1.1 in)	40 of 100 (Notable)
Vinita 2 N	United States	Record daily precipitation	91.9 mm (3.6 in)	40 of 100 (Notable)
Milan 1NW	United States	Record daily precipitation	41.1 mm (1.6 in)	39 of 100 (Notable)
Coranderrk Badger Weir	Australia	Record daily precipitation	26.2 mm (1.0 in)	37 of 100 (Notable)
Beardsley	United States	Record daily precipitation	45.2 mm (1.8 in)	37 of 100 (Notable)
Oelwein 2 S	United States	Record daily precipitation	35.8 mm (1.4 in)	36 of 100 (Notable)
Spavinaw	United States	Record daily precipitation	87.6 mm (3.4 in)	36 of 100 (Notable)
Guayama 1SW	Puerto Rico [United States]	Record low minimum temperature	19.4 C (66.9 F)	35 of 100 (Notable)
Piracuruca	Brazil	Record daily precipitation	66.0 mm (2.6 in)	34 of 100 (Routine)
Claremore 2 ENE	United States	Record daily precipitation	87.1 mm (3.4 in)	34 of 100 (Routine)
Kottarakara	India	Record daily precipitation	113.0 mm (4.4 in)	33 of 100 (Routine)
Canby	United States	Record daily precipitation	45.2 mm (1.8 in)	33 of 100 (Routine)
Grand Forks UNIV (NWS)	United States	Record daily precipitation	32.0 mm (1.3 in)	33 of 100 (Routine)
Bangalore	India	Record daily precipitation	44.5 mm (1.8 in)	32 of 100 (Routine)
Bodinayakkanur	India	Record daily precipitation	35.6 mm (1.4 in)	32 of 100 (Routine)
Borzja	Russia	Record high minimum temperature	15.2 C (59.4 F)	32 of 100 (Routine)
Seligman	United States	Record daily precipitation	97.5 mm (3.8 in)	32 of 100 (Routine)
Huntley Exp STN	United States	Record daily precipitation	36.6 mm (1.4 in)	32 of 100 (Routine)
Moccasin Exp STN	United States	Record daily precipitation	42.7 mm (1.7 in)	32 of 100 (Routine)
Sassafras Post Office	Australia	Record daily precipitation	34.3 mm (1.4 in)	31 of 100 (Routine)
Ponnani	India	Record daily precipitation	135.9 mm (5.4 in)	31 of 100 (Routine)
Warrenton 1 N	United States	Record daily precipitation	41.9 mm (1.6 in)	31 of 100 (Routine)
Dunn Ctr 1E	United States	Record daily precipitation	26.2 mm (1.0 in)	31 of 100 (Routine)
Stillwater 2 W	United States	Record daily precipitation	177.8 mm (7.0 in)	31 of 100 (Routine)
Wyandotte 1 N	United States	Record daily precipitation	77.5 mm (3.1 in)	31 of 100 (Routine)
Pattanamphitta	India	Record daily precipitation	90.2 mm (3.6 in)	30 of 100 (Routine)
Kundha (Kailkund)	India	Record daily precipitation	63.0 mm (2.5 in)	30 of 100 (Routine)
Castlewood	United States	Record daily precipitation	27.4 mm (1.1 in)	29 of 100 (Routine)
Newcastle	United States	Record low maximum temperature	5.6 C (42.1 F)	29 of 100 (Routine)
Montrose	Australia	Record daily precipitation	27.2 mm (1.1 in)	28 of 100 (Routine)
Governador Dix-Sept Rosado	Brazil	Record daily precipitation	52.0 mm (2.0 in)	28 of 100 (Routine)
Thiruvalla	India	Record daily precipitation	111.5 mm (4.4 in)	28 of 100 (Routine)
Adur	India	Record daily precipitation	70.6 mm (2.8 in)	28 of 100 (Routine)
Rogers	United States	Record daily precipitation	65.0 mm (2.6 in)	28 of 100 (Routine)
Russellville	United States	Record high minimum temperature	23.9 C (75.0 F)	28 of 100 (Routine)
Montevideo 1SW	United States	Record daily precipitation	35.8 mm (1.4 in)	28 of 100 (Routine)
Norwich	United States	Record low maximum temperature	6.1 C (43.0 F)	28 of 100 (Routine)
Poughkeepsie	United States	Record low maximum temperature	8.9 C (48.0 F)	28 of 100 (Routine)
Guthrie 5S	United States	Record daily precipitation	155.4 mm (6.1 in)	28 of 100 (Routine)
Monticello 2E	United States	Record low maximum temperature	7.2 C (45.0 F)	28 of 100 (Routine)
Morgan	United States	Record low maximum temperature	9.4 C (48.9 F)	28 of 100 (Routine)
Regina Int'l A	Canada	Record low maximum temperature	7.8 C (46.0 F)	27 of 100 (Routine)
Searcy	United States	Record high minimum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Ruston la Tech	United States	Record high minimum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Pryor	United States	Record daily precipitation	64.0 mm (2.5 in)	27 of 100 (Routine)
Marshall	United States	Record high minimum temperature	23.3 C (73.9 F)	27 of 100 (Routine)

Counts by Type and Timescale

709 records

Records set or tied on 21 May 1957 by type: Highest daily maximum 23, Lowest daily maximum 279, Highest daily minimum 108, Lowest daily minimum 36, Heaviest daily rainfall 250, Heaviest daily snowfall 12, Deepest snow cover 1.

Records on 21 May 1957 by type
Record type	Records
Highest daily maximum	23
Lowest daily maximum	279
Highest daily minimum	108
Lowest daily minimum	36
Heaviest daily rainfall	250
Heaviest daily snowfall	12
Deepest snow cover	1

Records on 21 May 1957 by timescale: all-time 1, monthly 8, daily 700.

How Much Records Were Beaten By

586 broken records

Margins by which the 586 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 203.0. Ties are not counted.

Top 20 by Significance

21 May 1957

Top 20 records on 21 May 1957 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1957	Willowmore, ZA	daily rain	45.7 mm (1.8 in)	39.1 mm (1.5 in)	46 years	61 of 100 (Major)
21 May 1957	Kodanand, IN	daily rain	178.3 mm (7.0 in)	135.1 mm (5.3 in)	51 years	60 of 100 (Major)
21 May 1957	Grand Canyon HQ, US	daily snowfall	20.3 cm (8.0 in)	20.3 cm (8.0 in)	52 years	60 of 100 (Major)
21 May 1957	Neosho, US	daily rain	126.2 mm (5.0 in)	93.2 mm (3.7 in)	18 years	51 of 100 (Notable)
21 May 1957	Gravette, US	daily rain	107.4 mm (4.2 in)	49.5 mm (1.9 in)	58 years	50 of 100 (Notable)
21 May 1957	San Mateo, US	daily rain	33.3 mm (1.3 in)	24.9 mm (1.0 in)	18 years	50 of 100 (Notable)
21 May 1957	Mt Vernon 3 SW, US	daily rain	95.8 mm (3.8 in)	76.7 mm (3.0 in)	18 years	49 of 100 (Notable)
21 May 1957	Artichoke Lake 1 E, US	daily rain	47.5 mm (1.9 in)	32.8 mm (1.3 in)	20 years	48 of 100 (Notable)
21 May 1957	Virginia City, US	daily snowfall	22.9 cm (9.0 in)	15.3 cm (6.0 in)	63 years	47 of 100 (Notable)
21 May 1957	Kunda, EE	daily rain	35.2 mm (1.4 in)	27.8 mm (1.1 in)	8 years	46 of 100 (Notable)
21 May 1957	Castelo Do Piaui (Marvao), BR	daily rain	62.5 mm (2.5 in)	47.5 mm (1.9 in)	28 years	45 of 100 (Notable)
21 May 1957	Denton, US	daily rain	32.5 mm (1.3 in)	22.1 mm (0.9 in)	44 years	45 of 100 (Notable)
21 May 1957	Hallock, US	daily rain	35.6 mm (1.4 in)	23.4 mm (0.9 in)	30 years	44 of 100 (Notable)
21 May 1957	Cedar Rapids #1, US	daily rain	45.7 mm (1.8 in)	22.1 mm (0.9 in)	48 years	41 of 100 (Notable)
21 May 1957	Schmidtsdrif, ZA	daily rain	29.0 mm (1.1 in)	23.7 mm (0.9 in)	12 years	40 of 100 (Notable)
21 May 1957	Vinita 2 N, US	daily rain	91.9 mm (3.6 in)	58.9 mm (2.3 in)	18 years	40 of 100 (Notable)
21 May 1957	Milan 1NW, US	daily rain	41.1 mm (1.6 in)	23.8 mm (0.9 in)	30 years	39 of 100 (Notable)
21 May 1957	Coranderrk Badger Weir, AU	daily rain	26.2 mm (1.0 in)	9.2 mm (0.36 in)	67 years	37 of 100 (Notable)
21 May 1957	Beardsley, US	daily rain	45.2 mm (1.8 in)	12.7 mm (0.5 in)	63 years	37 of 100 (Notable)
21 May 1957	Oelwein 2 S, US	daily rain	35.8 mm (1.4 in)	21.8 mm (0.9 in)	27 years	36 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

1793 to 1957

Records set or tied on this calendar date in each year from 1793 to 1957. 1957 had 709 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 1957-05-21: 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 2026-10-14 (14 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 50	574
50 to 100	9
100 to 150	1
150 to 200	1
200 to 250	1