Weather Records on 21 May 1934

590 weather records were set or tied worldwide on 21 May 1934. Highest significance: Buena Vista 2S, US.

Key Facts for 21 May 1934

On 21 May 1934, 590 weather records were set or tied at long-record stations worldwide.
525 were record highs and 22 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 24 monthly and 566 daily.
Buena Vista 2S set a monthly record daily precipitation of 49.5 mm (1.9 in) on 21 May 1934.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

590 stations

590 station records on 21 May 1934 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1934: highest significance records shown on the map
Station	Country	Type	Value	Significance
Buena Vista 2S	United States	Record daily precipitation	49.5 mm (1.9 in)	57 of 100 (Notable)
Kherson	Ukraine	Record daily precipitation	30.0 mm (1.2 in)	35 of 100 (Notable)
Lysebotn	Norway	Record daily precipitation	37.2 mm (1.5 in)	34 of 100 (Routine)
Cairns Post Office	Australia	Record daily precipitation	36.6 mm (1.4 in)	32 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record high minimum temperature	21.7 C (71.1 F)	31 of 100 (Routine)
Madison	United States	Record daily precipitation	45.7 mm (1.8 in)	30 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record high maximum temperature	21.5 C (70.7 F)	29 of 100 (Routine)
Suldalsvatn	Norway	Record daily precipitation	28.8 mm (1.1 in)	28 of 100 (Routine)
Yarrabah Comm Council	Australia	Record daily precipitation	50.0 mm (2.0 in)	27 of 100 (Routine)
Atlantic City Marina	United States	Record high maximum temperature	29.4 C (84.9 F)	26 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record high minimum temperature	14.3 C (57.7 F)	25 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record high minimum temperature	13.9 C (57.0 F)	25 of 100 (Routine)
Waukesha Wwtp	United States	Record daily precipitation	77.5 mm (3.1 in)	24 of 100 (Routine)
Harvey Creek Railway STN	Australia	Record daily precipitation	104.1 mm (4.1 in)	23 of 100 (Routine)
Greensburg	United States	Record high maximum temperature	33.9 C (93.0 F)	23 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high maximum temperature	33.9 C (93.0 F)	22 of 100 (Routine)
Dubuque River	United States	Record high maximum temperature	32.8 C (91.0 F)	22 of 100 (Routine)
Hvar	Croatia	Record high maximum temperature	28.0 C (82.4 F)	21 of 100 (Routine)
Annapolis US Naval Aca	United States	Record high maximum temperature	34.4 C (93.9 F)	21 of 100 (Routine)
Plainfield	United States	Record high maximum temperature	34.4 C (93.9 F)	21 of 100 (Routine)
Henderson 2 NNW	United States	Record high minimum temperature	23.3 C (73.9 F)	21 of 100 (Routine)
Sacramento 5 ESE	United States	Record high maximum temperature	36.7 C (98.1 F)	21 of 100 (Routine)
Leeu Gamka (Sar)	South Africa	Record daily precipitation	2.0 mm (0.08 in)	20 of 100 (Routine)
Holmogadd A	Sweden	Record daily precipitation	8.3 mm (0.33 in)	20 of 100 (Routine)
Sviland	Norway	Record daily precipitation	21.0 mm (0.8 in)	20 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record daily precipitation	12.2 mm (0.5 in)	20 of 100 (Routine)
Gotska Sandon	Sweden	Record daily precipitation	10.0 mm (0.4 in)	20 of 100 (Routine)
Roldal	Norway	Record daily precipitation	18.6 mm (0.7 in)	20 of 100 (Routine)
Mildura Post Office	Australia	Record high maximum temperature	26.1 C (79.0 F)	20 of 100 (Routine)
Melbourne Regional Office	Australia	Record high maximum temperature	24.3 C (75.7 F)	20 of 100 (Routine)
Blagovescensk	Russia	Record daily precipitation	18.6 mm (0.7 in)	20 of 100 (Routine)
Fallston	United States	Record high maximum temperature	33.9 C (93.0 F)	20 of 100 (Routine)
Ephrata	United States	Record high maximum temperature	35.6 C (96.1 F)	20 of 100 (Routine)
Koyah	India	Record daily precipitation	79.2 mm (3.1 in)	19 of 100 (Routine)
Oktjabrskij-Gorodok	Russia	Record daily precipitation	14.8 mm (0.6 in)	19 of 100 (Routine)
Milford 2 SE	United States	Record high maximum temperature	35.0 C (95.0 F)	19 of 100 (Routine)
Belvidere	United States	Record high maximum temperature	35.6 C (96.1 F)	19 of 100 (Routine)
Charlotteburg Rsvr	United States	Record high maximum temperature	33.9 C (93.0 F)	19 of 100 (Routine)
Philo 3 SW	United States	Record high maximum temperature	35.6 C (96.1 F)	19 of 100 (Routine)
Weatherford	United States	Record high maximum temperature	35.6 C (96.1 F)	19 of 100 (Routine)
Lancaster 4 WSW	United States	Record high minimum temperature	20.6 C (69.1 F)	19 of 100 (Routine)
Baltimore Customs House	United States	Record high maximum temperature	35.6 C (96.1 F)	19 of 100 (Routine)
Samnanger	Norway	Record daily precipitation	31.3 mm (1.2 in)	18 of 100 (Routine)
Ft Collins	United States	Record high minimum temperature	12.2 C (54.0 F)	18 of 100 (Routine)
Walnut	United States	Record high maximum temperature	34.4 C (93.9 F)	18 of 100 (Routine)
Darlington	United States	Record high maximum temperature	34.4 C (93.9 F)	18 of 100 (Routine)
Dover	United States	Record high maximum temperature	35.6 C (96.1 F)	18 of 100 (Routine)
Lancaster 2 NW	United States	Record high maximum temperature	34.4 C (93.9 F)	18 of 100 (Routine)
Mc Connellsville Lk 7	United States	Record high maximum temperature	33.3 C (91.9 F)	18 of 100 (Routine)
Lynchburg - Coop	United States	Record high maximum temperature	34.4 C (93.9 F)	18 of 100 (Routine)
Philadelphia City	United States	Record high maximum temperature	35.0 C (95.0 F)	18 of 100 (Routine)
Newport	United States	Record high maximum temperature	18.9 C (66.0 F)	18 of 100 (Routine)
Sogndal - Selseng	Norway	Record daily precipitation	14.3 mm (0.6 in)	17 of 100 (Routine)
Millsboro	United States	Record high maximum temperature	35.0 C (95.0 F)	17 of 100 (Routine)
Valparaiso Wtr Wks	United States	Record high minimum temperature	19.4 C (66.9 F)	17 of 100 (Routine)
Belle Plaine	United States	Record high maximum temperature	35.6 C (96.1 F)	17 of 100 (Routine)
Oskaloosa	United States	Record high minimum temperature	20.0 C (68.0 F)	17 of 100 (Routine)
Marion	United States	Record high maximum temperature	33.3 C (91.9 F)	17 of 100 (Routine)
Frederick Police Brks	United States	Record high maximum temperature	35.0 C (95.0 F)	17 of 100 (Routine)
Philipsburg	United States	Record low minimum temperature	-5.0 C (23.0 F)	17 of 100 (Routine)

Counts by Type and Timescale

590 records

Records set or tied on 21 May 1934 by type: Highest daily maximum 382, Lowest daily maximum 3, Highest daily minimum 143, Lowest daily minimum 19, Heaviest daily rainfall 43.

Records on 21 May 1934 by type
Record type	Records
Highest daily maximum	382
Lowest daily maximum	3
Highest daily minimum	143
Lowest daily minimum	19
Heaviest daily rainfall	43
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 May 1934 by timescale: all-time 0, monthly 24, daily 566.

How Much Records Were Beaten By

447 broken records

Margins by which the 447 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 45.2. Ties are not counted.

Top 20 by Significance

21 May 1934

Top 20 records on 21 May 1934 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1934	Buena Vista 2S, US	monthly rain	49.5 mm (1.9 in)	24.1 mm (0.9 in)	16 years	57 of 100 (Notable)
21 May 1934	Kherson, UA	daily rain	30.0 mm (1.2 in)	11.3 mm (0.4 in)	36 years	35 of 100 (Notable)
21 May 1934	Lysebotn, NO	daily rain	37.2 mm (1.5 in)	16.8 mm (0.7 in)	11 years	34 of 100 (Routine)
21 May 1934	Cairns Post Office, AU	daily rain	36.6 mm (1.4 in)	27.5 mm (1.1 in)	21 years	32 of 100 (Routine)
21 May 1934	Cleveland 2717 Euclid, US	daily high min	21.7 C (71.1 F)	3.9 C (7.0 F)	58 years	31 of 100 (Routine)
21 May 1934	Madison, US	daily rain	45.7 mm (1.8 in)	26.6 mm (1.0 in)	24 years	30 of 100 (Routine)
21 May 1934	Hobart (Ellerslie Road), AU	daily high max	21.5 C (70.7 F)	3.3 C (5.9 F)	44 years	29 of 100 (Routine)
21 May 1934	Suldalsvatn, NO	daily rain	28.8 mm (1.1 in)	14.5 mm (0.6 in)	12 years	28 of 100 (Routine)
21 May 1934	Yarrabah Comm Council, AU	daily rain	50.0 mm (2.0 in)	27.4 mm (1.1 in)	21 years	27 of 100 (Routine)
21 May 1934	Atlantic City Marina, US	daily high max	29.4 C (84.9 F)	3.8 C (6.8 F)	40 years	26 of 100 (Routine)
21 May 1934	Hobart (Ellerslie Road), AU	daily high min	14.3 C (57.7 F)	2.1 C (3.8 F)	44 years	25 of 100 (Routine)
21 May 1934	Dublin Phoenix Park, IE	monthly high min	13.9 C (57.0 F)	0.5 C (0.9 F)	28 years	25 of 100 (Routine)
21 May 1934	Waukesha Wwtp, US	monthly rain	77.5 mm (3.1 in)	8.9 mm (0.35 in)	6 years	24 of 100 (Routine)
21 May 1934	Harvey Creek Railway STN, AU	daily rain	104.1 mm (4.1 in)	45.2 mm (1.8 in)	21 years	23 of 100 (Routine)
21 May 1934	Greensburg, US	monthly high max	33.9 C (93.0 F)	0.6 C (1.1 F)	32 years	23 of 100 (Routine)
21 May 1934	Newark Liberty Intl AP, US	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	31 years	22 of 100 (Routine)
21 May 1934	Dubuque River, US	daily high max	32.8 C (91.0 F)	1.7 C (3.1 F)	47 years	22 of 100 (Routine)
21 May 1934	Hvar, HR	daily high max	28.0 C (82.4 F)	2.3 C (4.1 F)	29 years	21 of 100 (Routine)
21 May 1934	Annapolis US Naval Aca, US	daily high max	34.4 C (93.9 F)	3.3 C (5.9 F)	35 years	21 of 100 (Routine)
21 May 1934	Plainfield, US	daily high max	34.4 C (93.9 F)	2.7 C (4.9 F)	40 years	21 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 1934

Records set or tied on this calendar date in each year from 1793 to 1934. 1934 had 590 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 1934-05-21: 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 10	436
10 to 20	6
20 to 30	4
30 to 40	0
40 to 50	1