Weather Records on 21 May 2026

356 weather records were set or tied worldwide on 21 May 2026. Highest significance: Mammoth Cave, US.

Key Facts for 21 May 2026

On 21 May 2026, 356 weather records were set or tied at long-record stations worldwide.
236 were record highs and 69 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 13 monthly and 341 daily.
Mammoth Cave set a daily record precipitation of 103.9 mm (4.1 in) on 21 May 2026.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 461 records.

Record Map

356 stations

356 station records on 21 May 2026 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 2026: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mammoth Cave	United States	Record daily precipitation	103.9 mm (4.1 in)	72 of 100 (Major)
Lillington	United States	Record daily precipitation	44.2 mm (1.7 in)	58 of 100 (Notable)
Martinsburg E W Virginia Rgnl	United States	Record daily precipitation	50.5 mm (2.0 in)	52 of 100 (Notable)
Hacienda Ylang Ylang Veracruz	Mexico	Record low minimum temperature	14.5 C (58.1 F)	51 of 100 (Notable)
Dickinson Theodore Roosevelt R	United States	Record daily precipitation	47.0 mm (1.9 in)	50 of 100 (Notable)
Rome 2 NW	United States	Record high minimum temperature	20.6 C (69.1 F)	47 of 100 (Notable)
Charlottesville 2W	United States	Record high minimum temperature	23.9 C (75.0 F)	46 of 100 (Notable)
Skagway	United States	Record low maximum temperature	7.2 C (45.0 F)	46 of 100 (Notable)
Austwell	United States	Record daily precipitation	59.9 mm (2.4 in)	44 of 100 (Notable)
Welder Wildlife Foundation	United States	Record daily precipitation	60.7 mm (2.4 in)	44 of 100 (Notable)
Dover	United States	Record high maximum temperature	36.1 C (97.0 F)	41 of 100 (Notable)
Mayville	United States	Record low minimum temperature	-1.7 C (28.9 F)	41 of 100 (Notable)
Rio Grande City	United States	Record daily precipitation	64.8 mm (2.6 in)	40 of 100 (Notable)
Waddington	United Kingdom	Record high maximum temperature	28.1 C (82.6 F)	38 of 100 (Notable)
Stevensville 2SW	United States	Record high maximum temperature	35.0 C (95.0 F)	38 of 100 (Notable)
Iida	Japan	Record high minimum temperature	19.6 C (67.3 F)	36 of 100 (Notable)
Sangary	Russia	Record high minimum temperature	12.2 C (54.0 F)	36 of 100 (Notable)
Ft Lauderdale Beach	United States	Record high minimum temperature	27.2 C (81.0 F)	36 of 100 (Notable)
Louisa	United States	Record high maximum temperature	35.0 C (95.0 F)	36 of 100 (Notable)
Parkersburg	United States	Record daily precipitation	49.5 mm (1.9 in)	36 of 100 (Notable)
Balasore	India	Record high minimum temperature	31.2 C (88.2 F)	35 of 100 (Notable)
Nottingham: Watnall	United Kingdom	Record high maximum temperature	28.0 C (82.4 F)	35 of 100 (Notable)
Greenville Dwtn AP	United States	Record high minimum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Shionomisaki	Japan	Record high minimum temperature	22.8 C (73.0 F)	34 of 100 (Routine)
Manzanillo	Mexico	Record low minimum temperature	15.8 C (60.4 F)	34 of 100 (Routine)
Fayette	United States	Record high minimum temperature	20.0 C (68.0 F)	34 of 100 (Routine)
Mathis 4 SSW	United States	Record daily precipitation	57.2 mm (2.3 in)	34 of 100 (Routine)
McCook	United States	Record daily precipitation	36.3 mm (1.4 in)	34 of 100 (Routine)
Raleigh AP	United States	Record high maximum temperature	35.6 C (96.1 F)	34 of 100 (Routine)
Suntar	Russia	Record high minimum temperature	11.7 C (53.1 F)	33 of 100 (Routine)
Athens	United States	Record daily precipitation	36.1 mm (1.4 in)	33 of 100 (Routine)
Isfjord Radio	Norway	Record high minimum temperature	2.2 C (36.0 F)	32 of 100 (Routine)
Ouessant	France	Record high maximum temperature	23.1 C (73.6 F)	31 of 100 (Routine)
Halmstad Flygflottilj	Sweden	Record high minimum temperature	11.3 C (52.3 F)	31 of 100 (Routine)
Bloomington Indiana UNIV	United States	Record daily precipitation	55.9 mm (2.2 in)	31 of 100 (Routine)
Mandora	Australia	Record low maximum temperature	22.7 C (72.9 F)	30 of 100 (Routine)
Yibin	China	Record high minimum temperature	24.9 C (76.8 F)	30 of 100 (Routine)
Maysville Wwtp	United States	Record daily precipitation	39.4 mm (1.6 in)	30 of 100 (Routine)
Lawrenceburg Filt Plt	United States	Record high minimum temperature	20.0 C (68.0 F)	30 of 100 (Routine)
Zharkent	Kazakhstan	Record high minimum temperature	22.8 C (73.0 F)	29 of 100 (Routine)
Toluca (Obs)	Mexico	Record high minimum temperature	20.5 C (68.9 F)	29 of 100 (Routine)
Asturias/Aviles	Spain	Record high maximum temperature	30.6 C (87.1 F)	29 of 100 (Routine)
Buena Vista	United States	Record daily precipitation	28.4 mm (1.1 in)	29 of 100 (Routine)
Glennallen Kcam	United States	Record low maximum temperature	5.6 C (42.1 F)	29 of 100 (Routine)
Bugt	China	Record high minimum temperature	14.6 C (58.3 F)	28 of 100 (Routine)
Jagdalpur	India	Record high minimum temperature	29.2 C (84.6 F)	28 of 100 (Routine)
Durango Dgo.	Mexico	Record high minimum temperature	21.2 C (70.2 F)	28 of 100 (Routine)
Nordoyan Fyr	Norway	Record high minimum temperature	11.0 C (51.8 F)	28 of 100 (Routine)
Scottsboro	United States	Record daily precipitation	63.8 mm (2.5 in)	28 of 100 (Routine)
Idaho Falls 16 SE	United States	Record high minimum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Hacienda Ylang Ylang Veracruz	Mexico	Record low maximum temperature	26.8 C (80.2 F)	27 of 100 (Routine)
Lidkoping	Sweden	Record high minimum temperature	11.3 C (52.3 F)	27 of 100 (Routine)
Jersey: Airport	United Kingdom	Record high maximum temperature	27.1 C (80.8 F)	27 of 100 (Routine)
Guernsey: Airport	United Kingdom	Record high maximum temperature	25.2 C (77.4 F)	27 of 100 (Routine)
Athens Ou	United States	Record daily precipitation	47.5 mm (1.9 in)	27 of 100 (Routine)
Mt Rushmore Nmem	United States	Record low minimum temperature	-5.0 C (23.0 F)	27 of 100 (Routine)
Alice Intl AP	United States	Record daily precipitation	40.6 mm (1.6 in)	27 of 100 (Routine)
Port Hedland Airport	Australia	Record low maximum temperature	22.0 C (71.6 F)	26 of 100 (Routine)
Telfer Aero	Australia	Record low maximum temperature	17.4 C (63.3 F)	26 of 100 (Routine)
Machilipatnam	India	Record high minimum temperature	32.0 C (89.6 F)	26 of 100 (Routine)

Counts by Type and Timescale

356 records

Records set or tied on 21 May 2026 by type: Highest daily maximum 100, Lowest daily maximum 54, Highest daily minimum 136, Lowest daily minimum 15, Heaviest daily rainfall 50, Heaviest daily snowfall 1.

Records on 21 May 2026 by type
Record type	Records
Highest daily maximum	100
Lowest daily maximum	54
Highest daily minimum	136
Lowest daily minimum	15
Heaviest daily rainfall	50
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 21 May 2026 by timescale: all-time 2, monthly 13, daily 341.

How Much Records Were Beaten By

270 broken records

Margins by which the 270 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 68.6. Ties are not counted.

Top 20 by Significance

21 May 2026

Top 20 records on 21 May 2026 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 2026	Mammoth Cave, US	daily rain	103.9 mm (4.1 in)	68.6 mm (2.7 in)	79 years	72 of 100 (Major)
21 May 2026	Lillington, US	daily rain	44.2 mm (1.7 in)	30.5 mm (1.2 in)	133 years	58 of 100 (Notable)
21 May 2026	Martinsburg E W Virginia Rgnl, US	daily rain	50.5 mm (2.0 in)	14.4 mm (0.6 in)	111 years	52 of 100 (Notable)
21 May 2026	Hacienda Ylang Ylang Veracruz, MX	daily low min	14.5 C (58.1 F)	6.5 C (11.7 F)	33 years	51 of 100 (Notable)
21 May 2026	Dickinson Theodore Roosevelt R, US	daily rain	47.0 mm (1.9 in)	19.8 mm (0.8 in)	64 years	50 of 100 (Notable)
21 May 2026	Rome 2 NW, US	daily high min	20.6 C (69.1 F)	8.9 C (16.0 F)	68 years	47 of 100 (Notable)
21 May 2026	Charlottesville 2W, US	daily high min	23.9 C (75.0 F)	2.8 C (5.0 F)	123 years	46 of 100 (Notable)
21 May 2026	Skagway, US	daily low max	7.2 C (45.0 F)	2.8 C (5.0 F)	108 years	46 of 100 (Notable)
21 May 2026	Austwell, US	daily rain	59.9 mm (2.4 in)	9.1 mm (0.36 in)	116 years	44 of 100 (Notable)
21 May 2026	Welder Wildlife Foundation, US	daily rain	60.7 mm (2.4 in)	50.5 mm (2.0 in)	52 years	44 of 100 (Notable)
21 May 2026	Dover, US	daily high max	36.1 C (97.0 F)	2.2 C (4.0 F)	92 years	41 of 100 (Notable)
21 May 2026	Mayville, US	daily low min	-1.7 C (28.9 F)	0.6 C (1.1 F)	132 years	41 of 100 (Notable)
21 May 2026	Rio Grande City, US	daily rain	64.8 mm (2.6 in)	28.2 mm (1.1 in)	57 years	40 of 100 (Notable)
21 May 2026	Waddington, GB	monthly high max	28.1 C (82.6 F)	0.3 C (0.5 F)	72 years	38 of 100 (Notable)
21 May 2026	Stevensville 2SW, US	daily high max	35.0 C (95.0 F)	0.6 C (1.1 F)	92 years	38 of 100 (Notable)
21 May 2026	Iida, JP	monthly high min	19.6 C (67.3 F)	0.4 C (0.7 F)	62 years	36 of 100 (Notable)
21 May 2026	Sangary, RU	daily high min	12.2 C (54.0 F)	3.3 C (5.9 F)	76 years	36 of 100 (Notable)
21 May 2026	Ft Lauderdale Beach, US	daily high min	27.2 C (81.0 F)	1.6 C (2.9 F)	73 years	36 of 100 (Notable)
21 May 2026	Louisa, US	daily high max	35.0 C (95.0 F)	0.6 C (1.1 F)	84 years	36 of 100 (Notable)
21 May 2026	Parkersburg, US	daily rain	49.5 mm (1.9 in)	23.1 mm (0.9 in)	5 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 2026

Records set or tied on this calendar date in each year from 1793 to 2026. 2026 had 356 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 2026-05-21: 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Margin	Records
0 to 10	251
10 to 20	10
20 to 30	6
30 to 40	1
40 to 50	0
50 to 60	1
60 to 70	1