Weather Records on 21 May 1974

847 weather records were set or tied worldwide on 21 May 1974. Highest significance: Acude Tucunduba, BR.

Key Facts for 21 May 1974

On 21 May 1974, 847 weather records were set or tied at long-record stations worldwide.
250 were record highs and 393 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 837 daily.
Acude Tucunduba set a daily record precipitation of 102.0 mm (4.0 in) on 21 May 1974.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 458 records.

Record Map

847 stations

847 station records on 21 May 1974 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1974: highest significance records shown on the map
Station	Country	Type	Value	Significance
Acude Tucunduba	Brazil	Record daily precipitation	102.0 mm (4.0 in)	58 of 100 (Notable)
Paris Stp	United States	Record daily precipitation	69.1 mm (2.7 in)	55 of 100 (Notable)
Elbow	Canada	Record daily precipitation	44.5 mm (1.8 in)	53 of 100 (Notable)
Bolsoy Santar	Russia	Record daily precipitation	46.1 mm (1.8 in)	51 of 100 (Notable)
Im. Poliny Osipenko	Russia	Record daily precipitation	25.5 mm (1.0 in)	51 of 100 (Notable)
Sao Jose de Mipibu	Brazil	Record daily precipitation	79.7 mm (3.1 in)	49 of 100 (Notable)
Cumikan	Russia	Record daily precipitation	42.7 mm (1.7 in)	48 of 100 (Notable)
Snake Rvr	United States	Record daily snowfall	10.2 cm (4.0 in)	48 of 100 (Notable)
Driggs	United States	Record daily snowfall	10.2 cm (4.0 in)	47 of 100 (Notable)
Great Falls	Canada	Record daily precipitation	32.0 mm (1.3 in)	44 of 100 (Notable)
Swift Current A	Canada	Record daily snowfall	20.1 cm (7.9 in)	43 of 100 (Notable)
South Johnstone Exp STN	Australia	Record daily precipitation	123.8 mm (4.9 in)	42 of 100 (Notable)
Tobias Barreto	Brazil	Record daily precipitation	70.0 mm (2.8 in)	41 of 100 (Notable)
Turner	United States	Record daily precipitation	55.9 mm (2.2 in)	41 of 100 (Notable)
Powers Lake 1N	United States	Record daily precipitation	41.1 mm (1.6 in)	41 of 100 (Notable)
Madison Dane Co Rgnl AP	United States	Record daily precipitation	52.6 mm (2.1 in)	41 of 100 (Notable)
Tuba City	United States	Record low minimum temperature	-9.4 C (15.1 F)	40 of 100 (Notable)
Hudson Bay	Canada	Record daily precipitation	29.5 mm (1.2 in)	39 of 100 (Notable)
Oktjabrskij-Gorodok	Russia	Record low maximum temperature	7.6 C (45.7 F)	39 of 100 (Notable)
Holbrook	United States	Record low minimum temperature	-3.9 C (25.0 F)	38 of 100 (Notable)
Lisboa Geofisica	Portugal	Record high minimum temperature	22.8 C (73.0 F)	37 of 100 (Notable)
Pilvo	Russia	Record daily precipitation	25.1 mm (1.0 in)	37 of 100 (Notable)
Saguache	United States	Record low minimum temperature	-6.7 C (19.9 F)	37 of 100 (Notable)
Taos	United States	Record low minimum temperature	-5.6 C (21.9 F)	37 of 100 (Notable)
Tartu	Estonia	Record low minimum temperature	-3.4 C (25.9 F)	36 of 100 (Notable)
Velikie Luki	Russia	Record low minimum temperature	-3.7 C (25.3 F)	36 of 100 (Notable)
Mys Yelizavety	Russia	Record daily precipitation	25.9 mm (1.0 in)	36 of 100 (Notable)
Wallace 2W	United States	Record daily precipitation	34.3 mm (1.4 in)	36 of 100 (Notable)
Leola	United States	Record daily precipitation	27.9 mm (1.1 in)	36 of 100 (Notable)
Klintonel	Canada	Record daily snowfall	7.6 cm (3.0 in)	35 of 100 (Notable)
Bezenchuk	Russia	Record low maximum temperature	5.4 C (41.7 F)	35 of 100 (Notable)
Waverly	United States	Record high minimum temperature	20.0 C (68.0 F)	35 of 100 (Notable)
Goondi Mill Csr	Australia	Record daily precipitation	39.2 mm (1.5 in)	34 of 100 (Routine)
Maquoketa	United States	Record high minimum temperature	21.1 C (70.0 F)	34 of 100 (Routine)
David City 4E	United States	Record daily precipitation	76.7 mm (3.0 in)	34 of 100 (Routine)
Aztec Ruins Nm	United States	Record low minimum temperature	-4.4 C (24.1 F)	34 of 100 (Routine)
Moctezuma (Smn)	Mexico	Record daily precipitation	39.9 mm (1.6 in)	33 of 100 (Routine)
Kazan	Russia	Record low maximum temperature	7.0 C (44.6 F)	33 of 100 (Routine)
Elatma	Russia	Record low maximum temperature	9.2 C (48.6 F)	33 of 100 (Routine)
Manassa	United States	Record low minimum temperature	-8.3 C (17.1 F)	33 of 100 (Routine)
Highmore	United States	Record daily precipitation	55.9 mm (2.2 in)	33 of 100 (Routine)
Itapiuna	Brazil	Record daily precipitation	46.2 mm (1.8 in)	32 of 100 (Routine)
Poretskoye	Russia	Record low maximum temperature	5.8 C (42.4 F)	32 of 100 (Routine)
Springerville	United States	Record low minimum temperature	-7.2 C (19.0 F)	32 of 100 (Routine)
Hopkinsville	United States	Record high minimum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Artesia 6S	United States	Record low minimum temperature	2.8 C (37.0 F)	32 of 100 (Routine)
Laguna	United States	Record low minimum temperature	-1.7 C (28.9 F)	32 of 100 (Routine)
Tres Piedras	United States	Record low minimum temperature	-7.8 C (18.0 F)	32 of 100 (Routine)
Enid	United States	Record daily precipitation	41.9 mm (1.6 in)	32 of 100 (Routine)
Ipswich	United States	Record daily precipitation	32.8 mm (1.3 in)	32 of 100 (Routine)
Loa	United States	Record low minimum temperature	-7.8 C (18.0 F)	32 of 100 (Routine)
Flagstaff AP	United States	Record low minimum temperature	-6.1 C (21.0 F)	32 of 100 (Routine)
Sussex	Canada	Record low minimum temperature	-4.4 C (24.1 F)	31 of 100 (Routine)
Voronez	Russia	Record low minimum temperature	-1.2 C (29.8 F)	31 of 100 (Routine)
Urjupinsk	Russia	Record low maximum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Winkelman 6 S	United States	Record low minimum temperature	5.6 C (42.1 F)	31 of 100 (Routine)
Dixon Wwtp	United States	Record high minimum temperature	20.0 C (68.0 F)	31 of 100 (Routine)
Morrison	United States	Record high minimum temperature	20.0 C (68.0 F)	31 of 100 (Routine)
Olney 2S	United States	Record high minimum temperature	21.1 C (70.0 F)	31 of 100 (Routine)
Washington	United States	Record high minimum temperature	20.6 C (69.1 F)	31 of 100 (Routine)

Counts by Type and Timescale

847 records

Records set or tied on 21 May 1974 by type: Highest daily maximum 50, Lowest daily maximum 131, Highest daily minimum 200, Lowest daily minimum 262, Heaviest daily rainfall 187, Heaviest daily snowfall 12, Deepest snow cover 5.

Records on 21 May 1974 by type
Record type	Records
Highest daily maximum	50
Lowest daily maximum	131
Highest daily minimum	200
Lowest daily minimum	262
Heaviest daily rainfall	187
Heaviest daily snowfall	12
Deepest snow cover	5

Records on 21 May 1974 by timescale: all-time 0, monthly 10, daily 837.

How Much Records Were Beaten By

681 broken records

Margins by which the 681 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 712.0. Ties are not counted.

Top 20 by Significance

21 May 1974

Top 20 records on 21 May 1974 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1974	Acude Tucunduba, BR	daily rain	102.0 mm (4.0 in)	79.4 mm (3.1 in)	40 years	58 of 100 (Notable)
21 May 1974	Paris Stp, US	daily rain	69.1 mm (2.7 in)	33.0 mm (1.3 in)	72 years	55 of 100 (Notable)
21 May 1974	Elbow, CA	daily rain	44.5 mm (1.8 in)	40.4 mm (1.6 in)	27 years	53 of 100 (Notable)
21 May 1974	Bolsoy Santar, RU	daily rain	46.1 mm (1.8 in)	32.3 mm (1.3 in)	21 years	51 of 100 (Notable)
21 May 1974	Im. Poliny Osipenko, RU	daily rain	25.5 mm (1.0 in)	18.9 mm (0.7 in)	28 years	51 of 100 (Notable)
21 May 1974	Sao Jose de Mipibu, BR	daily rain	79.7 mm (3.1 in)	49.3 mm (1.9 in)	33 years	49 of 100 (Notable)
21 May 1974	Cumikan, RU	daily rain	42.7 mm (1.7 in)	26.4 mm (1.0 in)	21 years	48 of 100 (Notable)
21 May 1974	Snake Rvr, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	68 years	48 of 100 (Notable)
21 May 1974	Driggs, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	67 years	47 of 100 (Notable)
21 May 1974	Great Falls, CA	daily rain	32.0 mm (1.3 in)	18.0 mm (0.7 in)	37 years	44 of 100 (Notable)
21 May 1974	Swift Current A, CA	monthly snowfall	20.1 cm (7.9 in)	7.9 cm (3.1 in)	19 years	43 of 100 (Notable)
21 May 1974	South Johnstone Exp STN, AU	daily rain	123.8 mm (4.9 in)	46.6 mm (1.8 in)	52 years	42 of 100 (Notable)
21 May 1974	Tobias Barreto, BR	daily rain	70.0 mm (2.8 in)	35.4 mm (1.4 in)	11 years	41 of 100 (Notable)
21 May 1974	Turner, US	monthly rain	55.9 mm (2.2 in)	11.7 mm (0.5 in)	35 years	41 of 100 (Notable)
21 May 1974	Powers Lake 1N, US	daily rain	41.1 mm (1.6 in)	20.8 mm (0.8 in)	47 years	41 of 100 (Notable)
21 May 1974	Madison Dane Co Rgnl AP, US	daily rain	52.6 mm (2.1 in)	31.8 mm (1.3 in)	16 years	41 of 100 (Notable)
21 May 1974	Tuba City, US	daily low min	-9.4 C (15.1 F)	9.4 C (16.9 F)	28 years	40 of 100 (Notable)
21 May 1974	Hudson Bay, CA	daily rain	29.5 mm (1.2 in)	22.9 mm (0.9 in)	3 years	39 of 100 (Notable)
21 May 1974	Oktjabrskij-Gorodok, RU	daily low max	7.6 C (45.7 F)	3.9 C (7.0 F)	80 years	39 of 100 (Notable)
21 May 1974	Holbrook, US	daily low min	-3.9 C (25.0 F)	3.3 C (5.9 F)	74 years	38 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 1974

Records set or tied on this calendar date in each year from 1793 to 1974. 1974 had 847 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 1974-05-21: 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 100	678
100 to 200	2
200 to 300	0
300 to 400	0
400 to 500	0
500 to 600	0
600 to 700	0
700 to 800	1