Weather Records on 15 May 2021

412 weather records were set or tied worldwide on 15 May 2021. Highest significance: Portales, US.

Key Facts for 15 May 2021

On 15 May 2021, 412 weather records were set or tied at long-record stations worldwide.
200 were record highs and 108 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 5 monthly and 406 daily.
Portales set a daily record precipitation of 58.4 mm (2.3 in) on 15 May 2021.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 431 records.

Record Map

412 stations

412 station records on 15 May 2021 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 2021: highest significance records shown on the map
Station	Country	Type	Value	Significance
Portales	United States	Record daily precipitation	58.4 mm (2.3 in)	70 of 100 (Major)
McCracken	United States	Record daily precipitation	66.0 mm (2.6 in)	65 of 100 (Major)
Bomnak	Russia	Record daily precipitation	41.9 mm (1.6 in)	64 of 100 (Major)
Yan An	China	Record daily precipitation	43.4 mm (1.7 in)	62 of 100 (Major)
Bengbu	China	Record daily precipitation	61.2 mm (2.4 in)	61 of 100 (Major)
M.O. Amini	India	Record daily precipitation	79.0 mm (3.1 in)	56 of 100 (Notable)
Taiyuan	China	Record daily precipitation	32.3 mm (1.3 in)	47 of 100 (Notable)
Tivjaku	Russia	Record daily precipitation	27.4 mm (1.1 in)	47 of 100 (Notable)
Madison Wwtp	United States	Record daily precipitation	27.9 mm (1.1 in)	46 of 100 (Notable)
Hitoyoshi	Japan	Record daily precipitation	161.0 mm (6.3 in)	45 of 100 (Notable)
Guanghua	China	Record daily precipitation	55.4 mm (2.2 in)	44 of 100 (Notable)
Gvasjugi	Russia	Record daily precipitation	37.1 mm (1.5 in)	44 of 100 (Notable)
Mokpo	Korea, South	Record high minimum temperature	19.5 C (67.1 F)	43 of 100 (Notable)
Cordele	United States	Record low minimum temperature	8.9 C (48.0 F)	43 of 100 (Notable)
Jiexiu	China	Record daily precipitation	27.7 mm (1.1 in)	42 of 100 (Notable)
Miyakonojo	Japan	Record daily precipitation	150.1 mm (5.9 in)	41 of 100 (Notable)
Lumberton	United States	Record low minimum temperature	4.4 C (39.9 F)	41 of 100 (Notable)
Milan Exp STN	United States	Record low minimum temperature	3.3 C (37.9 F)	41 of 100 (Notable)
Newton	United States	Record daily precipitation	50.8 mm (2.0 in)	40 of 100 (Notable)
Aburatsu	Japan	Record daily precipitation	113.0 mm (4.4 in)	39 of 100 (Notable)
Krasnyj Jar	Russia	Record daily precipitation	26.9 mm (1.1 in)	39 of 100 (Notable)
Madrid	United States	Record daily precipitation	53.6 mm (2.1 in)	39 of 100 (Notable)
Glen St Mary 1 W	United States	Record low minimum temperature	5.6 C (42.1 F)	37 of 100 (Notable)
Columbia UNIV of Sc	United States	Record low minimum temperature	7.8 C (46.0 F)	37 of 100 (Notable)
Ness City	United States	Record daily precipitation	39.1 mm (1.5 in)	36 of 100 (Notable)
Norsk	Russia	Record daily precipitation	26.9 mm (1.1 in)	35 of 100 (Notable)
Aliceville	United States	Record low minimum temperature	2.8 C (37.0 F)	35 of 100 (Notable)
Izuhara	Japan	Record high minimum temperature	18.5 C (65.3 F)	34 of 100 (Routine)
Ajan	Russia	Record daily precipitation	43.9 mm (1.7 in)	34 of 100 (Routine)
Tiirikoja	Estonia	Record daily precipitation	34.6 mm (1.4 in)	33 of 100 (Routine)
Valencia	Spain	Record high maximum temperature	32.6 C (90.7 F)	33 of 100 (Routine)
Poset	Russia	Record high minimum temperature	10.9 C (51.6 F)	32 of 100 (Routine)
Dawson	United States	Record daily precipitation	27.9 mm (1.1 in)	32 of 100 (Routine)
Key West NAS	United States	Record low minimum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Wuzhou	China	Record high maximum temperature	36.2 C (97.2 F)	31 of 100 (Routine)
Fukuoka	Japan	Record high minimum temperature	21.3 C (70.3 F)	31 of 100 (Routine)
Kirov	Russia	Record high maximum temperature	31.4 C (88.5 F)	31 of 100 (Routine)
Shijiazhuang	China	Record daily precipitation	27.7 mm (1.1 in)	30 of 100 (Routine)
Mahabaleshwar	India	Record daily precipitation	31.0 mm (1.2 in)	30 of 100 (Routine)
Joskar-Ola	Russia	Record high maximum temperature	32.1 C (89.8 F)	30 of 100 (Routine)
Glazov	Russia	Record high minimum temperature	15.7 C (60.3 F)	30 of 100 (Routine)
Cherry Point MCAS	United States	Record low minimum temperature	6.1 C (43.0 F)	30 of 100 (Routine)
Valdosta Rgnl AP	United States	Record low minimum temperature	8.3 C (46.9 F)	30 of 100 (Routine)
Esashi	Japan	Record high maximum temperature	24.8 C (76.6 F)	29 of 100 (Routine)
Celo 2 S	United States	Record low minimum temperature	0.6 C (33.1 F)	29 of 100 (Routine)
Jokioinen Jokioisten Observato	Finland	Record high minimum temperature	12.2 C (54.0 F)	28 of 100 (Routine)
Laoag	Philippines	Record high minimum temperature	26.7 C (80.1 F)	28 of 100 (Routine)
Cairo 1SW	United States	Record low minimum temperature	9.4 C (48.9 F)	28 of 100 (Routine)
Farson 2NNE	United States	Record high minimum temperature	5.6 C (42.1 F)	28 of 100 (Routine)
Hefei	China	Record daily precipitation	33.8 mm (1.3 in)	27 of 100 (Routine)
Iizuka	Japan	Record high minimum temperature	20.5 C (68.9 F)	27 of 100 (Routine)
Surigao	Philippines	Record daily precipitation	52.8 mm (2.1 in)	27 of 100 (Routine)
Perm	Russia	Record high minimum temperature	18.0 C (64.4 F)	27 of 100 (Routine)
Sarapul	Russia	Record high maximum temperature	33.6 C (92.5 F)	27 of 100 (Routine)
Raleigh AP	United States	Record low minimum temperature	4.4 C (39.9 F)	27 of 100 (Routine)
Oberon (Springbank)	Australia	Record low maximum temperature	6.1 C (43.0 F)	26 of 100 (Routine)
Hamada	Japan	Record high minimum temperature	18.2 C (64.8 F)	26 of 100 (Routine)
Nagasaki	Japan	Record high minimum temperature	20.7 C (69.3 F)	26 of 100 (Routine)
Kjobli I Snaasa	Norway	Record high minimum temperature	8.7 C (47.7 F)	26 of 100 (Routine)
Pahrump 4 NW	United States	Record high minimum temperature	21.1 C (70.0 F)	26 of 100 (Routine)

Counts by Type and Timescale

412 records

Records set or tied on 15 May 2021 by type: Highest daily maximum 73, Lowest daily maximum 27, Highest daily minimum 127, Lowest daily minimum 81, Heaviest daily rainfall 104.

Records on 15 May 2021 by type
Record type	Records
Highest daily maximum	73
Lowest daily maximum	27
Highest daily minimum	127
Lowest daily minimum	81
Heaviest daily rainfall	104
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 May 2021 by timescale: all-time 1, monthly 5, daily 406.

How Much Records Were Beaten By

336 broken records

Margins by which the 336 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 66.5. Ties are not counted.

Top 20 by Significance

15 May 2021

Top 20 records on 15 May 2021 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 2021	Portales, US	daily rain	58.4 mm (2.3 in)	38.8 mm (1.5 in)	100 years	70 of 100 (Major)
15 May 2021	McCracken, US	daily rain	66.0 mm (2.6 in)	37.6 mm (1.5 in)	74 years	65 of 100 (Major)
15 May 2021	Bomnak, RU	daily rain	41.9 mm (1.6 in)	24.9 mm (1.0 in)	52 years	64 of 100 (Major)
15 May 2021	Yan An, CN	daily rain	43.4 mm (1.7 in)	30.9 mm (1.2 in)	56 years	62 of 100 (Major)
15 May 2021	Bengbu, CN	daily rain	61.2 mm (2.4 in)	45.2 mm (1.8 in)	70 years	61 of 100 (Major)
15 May 2021	M.O. Amini, IN	daily rain	79.0 mm (3.1 in)	62.0 mm (2.4 in)	76 years	56 of 100 (Notable)
15 May 2021	Taiyuan, CN	daily rain	32.3 mm (1.3 in)	26.0 mm (1.0 in)	28 years	47 of 100 (Notable)
15 May 2021	Tivjaku, RU	daily rain	27.4 mm (1.1 in)	11.6 mm (0.5 in)	60 years	47 of 100 (Notable)
15 May 2021	Madison Wwtp, US	daily rain	27.9 mm (1.1 in)	15.2 mm (0.6 in)	76 years	46 of 100 (Notable)
15 May 2021	Hitoyoshi, JP	daily rain	161.0 mm (6.3 in)	66.5 mm (2.6 in)	40 years	45 of 100 (Notable)
15 May 2021	Guanghua, CN	daily rain	55.4 mm (2.2 in)	25.9 mm (1.0 in)	56 years	44 of 100 (Notable)
15 May 2021	Gvasjugi, RU	daily rain	37.1 mm (1.5 in)	16.0 mm (0.6 in)	36 years	44 of 100 (Notable)
15 May 2021	Mokpo, KR	daily high min	19.5 C (67.1 F)	2.5 C (4.5 F)	83 years	43 of 100 (Notable)
15 May 2021	Cordele, US	daily low min	8.9 C (48.0 F)	1.1 C (2.0 F)	116 years	43 of 100 (Notable)
15 May 2021	Jiexiu, CN	daily rain	27.7 mm (1.1 in)	14.0 mm (0.6 in)	56 years	42 of 100 (Notable)
15 May 2021	Miyakonojo, JP	daily rain	150.1 mm (5.9 in)	56.1 mm (2.2 in)	40 years	41 of 100 (Notable)
15 May 2021	Lumberton, US	daily low min	4.4 C (39.9 F)	0.6 C (1.1 F)	104 years	41 of 100 (Notable)
15 May 2021	Milan Exp STN, US	daily low min	3.3 C (37.9 F)	0.6 C (1.1 F)	104 years	41 of 100 (Notable)
15 May 2021	Newton, US	daily rain	50.8 mm (2.0 in)	0.8 mm (0.03 in)	120 years	40 of 100 (Notable)
15 May 2021	Aburatsu, JP	daily rain	113.0 mm (4.4 in)	58.5 mm (2.3 in)	40 years	39 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

1820 to 2021

Records set or tied on this calendar date in each year from 1820 to 2021. 2021 had 412 records.

Counts for years before the ledger starts come from the same station rules.

Records on 05-15 in each year
Year	Records
1820	1
1825	1
1831	1
1832	1
1837	2
1845	1
1847	2
1848	1
1855	2
1857	2
1859	1
1862	1
1863	1
1865	1
1866	2
1867	1
1868	2
1870	1
1871	3
1874	2
1876	4
1878	1
1879	2
1881	1
1883	1
1885	1
1886	2
1888	3
1891	3
1893	5
1894	2
1895	4
1896	2
1897	4
1898	3
1899	9
1900	9
1901	2
1902	9
1903	4
1904	13
1905	16
1906	10
1907	27
1908	25
1909	89
1910	27
1911	27
1912	26
1913	60
1914	16
1915	236
1916	27
1917	80
1918	133
1919	25
1920	58
1921	92
1922	30
1923	125
1924	174
1925	100
1926	161
1927	191
1928	144
1929	161
1930	136
1931	459
1932	368
1933	439
1934	227
1935	288
1936	372
1937	373
1938	393
1939	351
1940	179
1941	454
1942	701
1943	568
1944	630
1945	588
1946	238
1947	334
1948	264
1949	363
1950	260
1951	736
1952	476
1953	426
1954	355
1955	538
1956	466
1957	521
1958	605
1959	764
1960	291
1961	508
1962	1,128
1963	782
1964	347
1965	320
1966	389
1967	609
1968	1,019
1969	790
1970	512
1971	351
1972	484
1973	818
1974	1,230
1975	372
1976	803
1977	1,186
1978	922
1979	404
1980	625
1981	586
1982	500
1983	1,215
1984	1,059
1985	649
1986	679
1987	1,073
1988	643
1989	552
1990	776
1991	1,179
1992	944
1993	784
1994	910
1995	1,750
1996	1,452
1997	1,175
1998	1,641
1999	810
2000	850
2001	1,280
2002	801
2003	1,023
2004	1,046
2005	767
2006	955
2007	949
2008	995
2009	675
2010	1,088
2011	1,298
2012	751
2013	1,081
2014	1,411
2015	717
2016	890
2017	435
2018	1,074
2019	627
2020	472
2021	412
2022	847
2023	566
2024	596
2025	801
2026	481

Download the Data

Data for records on 2021-05-15: 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 10	308
10 to 20	14
20 to 30	4
30 to 40	5
40 to 50	1
50 to 60	2
60 to 70	2