Weather Records on 21 May 1994

656 weather records were set or tied worldwide on 21 May 1994. Highest significance: Campi, PT.

Key Facts for 21 May 1994

On 21 May 1994, 656 weather records were set or tied at long-record stations worldwide.
136 were record highs and 365 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 15 monthly and 640 daily.
Campi set a daily record precipitation of 92.0 mm (3.6 in) on 21 May 1994.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 459 records.

Record Map

656 stations

656 station records on 21 May 1994 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1994: highest significance records shown on the map
Station	Country	Type	Value	Significance
Campi	Portugal	Record daily precipitation	92.0 mm (3.6 in)	58 of 100 (Notable)
Laryak	Russia	Record daily precipitation	26.3 mm (1.0 in)	49 of 100 (Notable)
Vitoria de Santo Antao	Brazil	Record daily precipitation	82.6 mm (3.3 in)	48 of 100 (Notable)
Nanuque-Montante	Brazil	Record daily precipitation	38.2 mm (1.5 in)	48 of 100 (Notable)
Ulken Nary	Kazakhstan	Record daily precipitation	31.0 mm (1.2 in)	46 of 100 (Notable)
Lowell	United States	Record low minimum temperature	1.1 C (34.0 F)	45 of 100 (Notable)
Henrietta	United States	Record low minimum temperature	3.9 C (39.0 F)	45 of 100 (Notable)
Setauket Strong	United States	Record low minimum temperature	2.2 C (36.0 F)	44 of 100 (Notable)
Federal Pt	United States	Record low maximum temperature	22.2 C (72.0 F)	43 of 100 (Notable)
Mengzi	China	Record daily precipitation	71.0 mm (2.8 in)	42 of 100 (Notable)
Guantanamo Bay NAS	Cuba	Record daily precipitation	114.6 mm (4.5 in)	42 of 100 (Notable)
Barcelos	Portugal	Record daily precipitation	58.0 mm (2.3 in)	42 of 100 (Notable)
Union Springs 9 S	United States	Record low minimum temperature	6.1 C (43.0 F)	42 of 100 (Notable)
Glen St Mary 1 W	United States	Record low maximum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Pollock	United States	Record daily precipitation	35.6 mm (1.4 in)	41 of 100 (Notable)
Chorozinho	Brazil	Record daily precipitation	56.2 mm (2.2 in)	40 of 100 (Notable)
Gieterveen	Netherlands	Record daily precipitation	27.0 mm (1.1 in)	39 of 100 (Notable)
Aleksandrovsk-Sahalinskij	Russia	Record high minimum temperature	8.7 C (47.7 F)	39 of 100 (Notable)
Durham	United Kingdom	Record daily precipitation	26.6 mm (1.0 in)	39 of 100 (Notable)
Avon Park 2 W	United States	Record low maximum temperature	26.7 C (80.1 F)	38 of 100 (Notable)
Bartow 1SE	United States	Record low maximum temperature	25.6 C (78.1 F)	38 of 100 (Notable)
Saint Leo	United States	Record low minimum temperature	13.3 C (55.9 F)	38 of 100 (Notable)
Titusville	United States	Record low maximum temperature	23.3 C (73.9 F)	37 of 100 (Notable)
Berea College	United States	Record low minimum temperature	0.0 C (32.0 F)	37 of 100 (Notable)
El Cuije	Mexico	Record daily precipitation	93.0 mm (3.7 in)	36 of 100 (Notable)
Matsumoto	Japan	Record daily precipitation	119.9 mm (4.7 in)	35 of 100 (Notable)
Crescent City	United States	Record low maximum temperature	22.8 C (73.0 F)	35 of 100 (Notable)
Deland 1 SSE	United States	Record low maximum temperature	22.8 C (73.0 F)	35 of 100 (Notable)
St Petersburg	United States	Record low maximum temperature	25.0 C (77.0 F)	35 of 100 (Notable)
Morehead City 2 WNW	United States	Record low maximum temperature	16.7 C (62.1 F)	35 of 100 (Notable)
Brooksville Chin Hill	United States	Record low minimum temperature	11.7 C (53.1 F)	34 of 100 (Routine)
Lisboa Geofisica	Portugal	Record daily precipitation	26.2 mm (1.0 in)	33 of 100 (Routine)
Bayview Model Basin	United States	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Milpa Alta	Mexico	Record low minimum temperature	6.7 C (44.1 F)	32 of 100 (Routine)
Brunswick	United States	Record low maximum temperature	23.3 C (73.9 F)	32 of 100 (Routine)
Big Meadows	United States	Record low maximum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Prentice #2	United States	Record high maximum temperature	31.1 C (88.0 F)	32 of 100 (Routine)
El Pilar	Mexico	Record low maximum temperature	25.6 C (78.1 F)	31 of 100 (Routine)
Talisman I	Mexico	Record low minimum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Childs	United States	Record low minimum temperature	3.9 C (39.0 F)	31 of 100 (Routine)
Iron Mtn-Kingsford Wwtp	United States	Record high maximum temperature	33.3 C (91.9 F)	31 of 100 (Routine)
Gastonia	United States	Record low maximum temperature	17.2 C (63.0 F)	31 of 100 (Routine)
Gabes	Tunisia	Record low minimum temperature	9.9 C (49.8 F)	30 of 100 (Routine)
Rosalia	United States	Record daily precipitation	33.8 mm (1.3 in)	30 of 100 (Routine)
Long Lake Dam	United States	Record high maximum temperature	31.7 C (89.1 F)	30 of 100 (Routine)
Minocqua	United States	Record high maximum temperature	31.7 C (89.1 F)	30 of 100 (Routine)
Dnipropetrovsk	Ukraine	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Merriman	United States	Record daily precipitation	43.7 mm (1.7 in)	29 of 100 (Routine)
Georgetown 2 E	United States	Record low minimum temperature	8.9 C (48.0 F)	29 of 100 (Routine)
McClellanville	United States	Record low maximum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Tangier Island	United States	Record low maximum temperature	14.4 C (57.9 F)	29 of 100 (Routine)
Park Falls Dnr HQ	United States	Record high maximum temperature	30.6 C (87.1 F)	29 of 100 (Routine)
Dwtn Charleston	United States	Record low maximum temperature	18.9 C (66.0 F)	29 of 100 (Routine)
Santo Domingo	Mexico	Record daily precipitation	25.9 mm (1.0 in)	28 of 100 (Routine)
Aguiar da Beira	Portugal	Record daily precipitation	47.0 mm (1.9 in)	28 of 100 (Routine)
Ripogenus Dam	United States	Record low minimum temperature	-2.8 C (27.0 F)	28 of 100 (Routine)
Blackville 3 W	United States	Record low minimum temperature	5.0 C (41.0 F)	28 of 100 (Routine)
Cedar Butte	United States	Record daily precipitation	46.2 mm (1.8 in)	28 of 100 (Routine)
Zinder	Niger	Record high minimum temperature	29.1 C (84.4 F)	27 of 100 (Routine)
Bangkok Metropolis	Thailand	Record daily precipitation	102.1 mm (4.0 in)	27 of 100 (Routine)

Counts by Type and Timescale

656 records

Records set or tied on 21 May 1994 by type: Highest daily maximum 60, Lowest daily maximum 156, Highest daily minimum 76, Lowest daily minimum 209, Heaviest daily rainfall 151, Deepest snow cover 4.

Records on 21 May 1994 by type
Record type	Records
Highest daily maximum	60
Lowest daily maximum	156
Highest daily minimum	76
Lowest daily minimum	209
Heaviest daily rainfall	151
Heaviest daily snowfall	0
Deepest snow cover	4

Records on 21 May 1994 by timescale: all-time 1, monthly 15, daily 640.

How Much Records Were Beaten By

482 broken records

Margins by which the 482 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 63.3. Ties are not counted.

Top 20 by Significance

21 May 1994

Top 20 records on 21 May 1994 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1994	Campi, PT	daily rain	92.0 mm (3.6 in)	61.0 mm (2.4 in)	43 years	58 of 100 (Notable)
21 May 1994	Laryak, RU	daily rain	26.3 mm (1.0 in)	12.3 mm (0.5 in)	48 years	49 of 100 (Notable)
21 May 1994	Vitoria de Santo Antao, BR	daily rain	82.6 mm (3.3 in)	50.4 mm (2.0 in)	4 years	48 of 100 (Notable)
21 May 1994	Nanuque-Montante, BR	daily rain	38.2 mm (1.5 in)	28.0 mm (1.1 in)	12 years	48 of 100 (Notable)
21 May 1994	Ulken Nary, KZ	daily rain	31.0 mm (1.2 in)	19.4 mm (0.8 in)	21 years	46 of 100 (Notable)
21 May 1994	Lowell, US	daily low min	1.1 C (34.0 F)	2.2 C (4.0 F)	101 years	45 of 100 (Notable)
21 May 1994	Henrietta, US	daily low min	3.9 C (39.0 F)	5.0 C (9.0 F)	83 years	45 of 100 (Notable)
21 May 1994	Setauket Strong, US	daily low min	2.2 C (36.0 F)	2.8 C (5.0 F)	87 years	44 of 100 (Notable)
21 May 1994	Federal Pt, US	daily low max	22.2 C (72.0 F)	3.4 C (6.1 F)	71 years	43 of 100 (Notable)
21 May 1994	Mengzi, CN	daily rain	71.0 mm (2.8 in)	36.8 mm (1.4 in)	4 years	42 of 100 (Notable)
21 May 1994	Guantanamo Bay NAS, CU	daily rain	114.6 mm (4.5 in)	63.3 mm (2.5 in)	21 years	42 of 100 (Notable)
21 May 1994	Barcelos, PT	daily rain	58.0 mm (2.3 in)	41.0 mm (1.6 in)	15 years	42 of 100 (Notable)
21 May 1994	Union Springs 9 S, US	daily low min	6.1 C (43.0 F)	1.1 C (2.0 F)	99 years	42 of 100 (Notable)
21 May 1994	Glen St Mary 1 W, US	daily low max	22.2 C (72.0 F)	3.9 C (7.0 F)	72 years	41 of 100 (Notable)
21 May 1994	Pollock, US	daily rain	35.6 mm (1.4 in)	11.5 mm (0.5 in)	67 years	41 of 100 (Notable)
21 May 1994	Chorozinho, BR	daily rain	56.2 mm (2.2 in)	30.7 mm (1.2 in)	41 years	40 of 100 (Notable)
21 May 1994	Gieterveen, NL	daily rain	27.0 mm (1.1 in)	13.7 mm (0.5 in)	20 years	39 of 100 (Notable)
21 May 1994	Aleksandrovsk-Sahalinskij, RU	daily high min	8.7 C (47.7 F)	0.7 C (1.3 F)	92 years	39 of 100 (Notable)
21 May 1994	Durham, GB	daily rain	26.6 mm (1.0 in)	5.3 mm (0.21 in)	61 years	39 of 100 (Notable)
21 May 1994	Avon Park 2 W, US	daily low max	26.7 C (80.1 F)	1.1 C (2.0 F)	81 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 1994

Records set or tied on this calendar date in each year from 1793 to 1994. 1994 had 656 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 1994-05-21: 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	435
10 to 20	33
20 to 30	4
30 to 40	4
40 to 50	2
50 to 60	2
60 to 70	2