Weather Records on 21 May 2015

956 weather records were set or tied worldwide on 21 May 2015. Highest significance: Garnett 1 E, US.

Key Facts for 21 May 2015

On 21 May 2015, 956 weather records were set or tied at long-record stations worldwide.
242 were record highs and 579 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 946 daily.
Garnett 1 E set a daily record low maximum temperature of 11.1 C (52.0 F) on 21 May 2015.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 457 records.

Record Map

956 stations

956 station records on 21 May 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Garnett 1 E	United States	Record low maximum temperature	11.1 C (52.0 F)	58 of 100 (Notable)
Pahoa 65	United States	Record daily precipitation	57.2 mm (2.3 in)	55 of 100 (Notable)
Luling	United States	Record daily precipitation	81.8 mm (3.2 in)	54 of 100 (Notable)
Batamaj	Russia	Record daily precipitation	25.9 mm (1.0 in)	51 of 100 (Notable)
Midland 4 ENE	United States	Record low maximum temperature	15.6 C (60.1 F)	50 of 100 (Notable)
Marshall	United States	Record low maximum temperature	10.0 C (50.0 F)	49 of 100 (Notable)
Carbondale Sewage Plt	United States	Record low maximum temperature	12.8 C (55.0 F)	48 of 100 (Notable)
Monmouth	United States	Record low maximum temperature	7.8 C (46.0 F)	48 of 100 (Notable)
White Hall 1 E	United States	Record low maximum temperature	10.0 C (50.0 F)	48 of 100 (Notable)
Allerton	United States	Record low maximum temperature	9.4 C (48.9 F)	48 of 100 (Notable)
Knoxville	United States	Record low maximum temperature	8.9 C (48.0 F)	48 of 100 (Notable)
Walnut	United States	Record low maximum temperature	9.4 C (48.9 F)	47 of 100 (Notable)
Albia 3 NNE	United States	Record low maximum temperature	8.9 C (48.0 F)	47 of 100 (Notable)
Grinnell 3 SW	United States	Record low maximum temperature	8.9 C (48.0 F)	47 of 100 (Notable)
Newton	United States	Record low maximum temperature	8.9 C (48.0 F)	47 of 100 (Notable)
Oskaloosa	United States	Record low maximum temperature	10.0 C (50.0 F)	47 of 100 (Notable)
Beloit	United States	Record low maximum temperature	12.2 C (54.0 F)	47 of 100 (Notable)
Slutsk	Belarus	Record daily precipitation	32.0 mm (1.3 in)	46 of 100 (Notable)
Tevriz	Russia	Record daily precipitation	26.9 mm (1.1 in)	46 of 100 (Notable)
Effingham 3SW	United States	Record low maximum temperature	10.0 C (50.0 F)	46 of 100 (Notable)
Fairfield	United States	Record low maximum temperature	8.9 C (48.0 F)	46 of 100 (Notable)
Iowa City	United States	Record low maximum temperature	10.0 C (50.0 F)	46 of 100 (Notable)
Keosauqua	United States	Record low maximum temperature	9.4 C (48.9 F)	46 of 100 (Notable)
Marshalltown	United States	Record low maximum temperature	8.9 C (48.0 F)	46 of 100 (Notable)
Washington	United States	Record low maximum temperature	9.4 C (48.9 F)	46 of 100 (Notable)
Batesville	United States	Record low maximum temperature	15.6 C (60.1 F)	46 of 100 (Notable)
Galva	United States	Record low maximum temperature	8.3 C (46.9 F)	45 of 100 (Notable)
La Harpe	United States	Record low maximum temperature	8.9 C (48.0 F)	45 of 100 (Notable)
Tuscola	United States	Record low maximum temperature	10.0 C (50.0 F)	45 of 100 (Notable)
Bedford	United States	Record low maximum temperature	10.0 C (50.0 F)	45 of 100 (Notable)
Denison	United States	Record low maximum temperature	7.8 C (46.0 F)	45 of 100 (Notable)
Indianola 1SW	United States	Record low maximum temperature	9.4 C (48.9 F)	45 of 100 (Notable)
Wallace	United States	Record low maximum temperature	11.7 C (53.1 F)	45 of 100 (Notable)
Jefferson City Wtp	United States	Record low maximum temperature	12.2 C (54.0 F)	45 of 100 (Notable)
Oregon	United States	Record low maximum temperature	13.3 C (55.9 F)	45 of 100 (Notable)
Poplar Bluff	United States	Record low maximum temperature	15.0 C (59.0 F)	45 of 100 (Notable)
Potosi 4 SW	United States	Record low maximum temperature	11.7 C (53.1 F)	45 of 100 (Notable)
Lufkin Angelina Co AP	United States	Record daily precipitation	63.2 mm (2.5 in)	45 of 100 (Notable)
Olney 2S	United States	Record low maximum temperature	11.7 C (53.1 F)	44 of 100 (Notable)
Allison	United States	Record low maximum temperature	8.9 C (48.0 F)	44 of 100 (Notable)
Elkader 6 SSW	United States	Record low maximum temperature	8.3 C (46.9 F)	44 of 100 (Notable)
David City 4E	United States	Record low maximum temperature	8.9 C (48.0 F)	44 of 100 (Notable)
Oshkosh	United States	Record low maximum temperature	10.0 C (50.0 F)	44 of 100 (Notable)
W Pt	United States	Record low maximum temperature	8.9 C (48.0 F)	44 of 100 (Notable)
Sinton	United States	Record daily precipitation	94.2 mm (3.7 in)	44 of 100 (Notable)
Froyset	Norway	Record daily precipitation	37.7 mm (1.5 in)	43 of 100 (Notable)
Paris Stp	United States	Record low maximum temperature	10.6 C (51.1 F)	43 of 100 (Notable)
Audubon	United States	Record low maximum temperature	8.9 C (48.0 F)	43 of 100 (Notable)
Carroll	United States	Record low maximum temperature	8.9 C (48.0 F)	43 of 100 (Notable)
Mt Pleasant 1 SW	United States	Record low maximum temperature	9.4 C (48.9 F)	43 of 100 (Notable)
Poplarville Exp STN	United States	Record low maximum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Doniphan	United States	Record low maximum temperature	16.1 C (61.0 F)	43 of 100 (Notable)
Fremont	United States	Record low maximum temperature	10.6 C (51.1 F)	43 of 100 (Notable)
Lodgepole	United States	Record low maximum temperature	7.8 C (46.0 F)	43 of 100 (Notable)
Tekamah	United States	Record low maximum temperature	10.0 C (50.0 F)	43 of 100 (Notable)
Salem AP (McNary Field)	United States	Record high minimum temperature	13.3 C (55.9 F)	43 of 100 (Notable)
Yakima AP	United States	Record daily precipitation	26.7 mm (1.1 in)	43 of 100 (Notable)
Windsor	United States	Record low maximum temperature	10.0 C (50.0 F)	42 of 100 (Notable)
Guthrie Ctr	United States	Record low maximum temperature	9.4 C (48.9 F)	42 of 100 (Notable)
Iowa Falls	United States	Record low maximum temperature	9.4 C (48.9 F)	42 of 100 (Notable)

Counts by Type and Timescale

956 records

Records set or tied on 21 May 2015 by type: Highest daily maximum 81, Lowest daily maximum 485, Highest daily minimum 161, Lowest daily minimum 94, Heaviest daily rainfall 133, Deepest snow cover 2.

Records on 21 May 2015 by type
Record type	Records
Highest daily maximum	81
Lowest daily maximum	485
Highest daily minimum	161
Lowest daily minimum	94
Heaviest daily rainfall	133
Heaviest daily snowfall	0
Deepest snow cover	2

Records on 21 May 2015 by timescale: all-time 0, monthly 10, daily 946.

How Much Records Were Beaten By

788 broken records

Margins by which the 788 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 300.0. Ties are not counted.

Top 20 by Significance

21 May 2015

Top 20 records on 21 May 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 2015	Garnett 1 E, US	daily low max	11.1 C (52.0 F)	8.9 C (16.0 F)	101 years	58 of 100 (Notable)
21 May 2015	Pahoa 65, US	daily rain	57.2 mm (2.3 in)	21.6 mm (0.9 in)	108 years	55 of 100 (Notable)
21 May 2015	Luling, US	daily rain	81.8 mm (3.2 in)	31.0 mm (1.2 in)	98 years	54 of 100 (Notable)
21 May 2015	Batamaj, RU	daily rain	25.9 mm (1.0 in)	17.3 mm (0.7 in)	57 years	51 of 100 (Notable)
21 May 2015	Midland 4 ENE, US	daily low max	15.6 C (60.1 F)	5.0 C (9.0 F)	119 years	50 of 100 (Notable)
21 May 2015	Marshall, US	daily low max	10.0 C (50.0 F)	5.6 C (10.1 F)	96 years	49 of 100 (Notable)
21 May 2015	Carbondale Sewage Plt, US	daily low max	12.8 C (55.0 F)	5.0 C (9.0 F)	96 years	48 of 100 (Notable)
21 May 2015	Monmouth, US	daily low max	7.8 C (46.0 F)	5.5 C (9.9 F)	96 years	48 of 100 (Notable)
21 May 2015	White Hall 1 E, US	daily low max	10.0 C (50.0 F)	4.4 C (7.9 F)	120 years	48 of 100 (Notable)
21 May 2015	Allerton, US	daily low max	9.4 C (48.9 F)	4.5 C (8.1 F)	108 years	48 of 100 (Notable)
21 May 2015	Knoxville, US	daily low max	8.9 C (48.0 F)	4.4 C (7.9 F)	115 years	48 of 100 (Notable)
21 May 2015	Walnut, US	daily low max	9.4 C (48.9 F)	4.5 C (8.1 F)	120 years	47 of 100 (Notable)
21 May 2015	Albia 3 NNE, US	daily low max	8.9 C (48.0 F)	3.9 C (7.0 F)	101 years	47 of 100 (Notable)
21 May 2015	Grinnell 3 SW, US	daily low max	8.9 C (48.0 F)	3.9 C (7.0 F)	120 years	47 of 100 (Notable)
21 May 2015	Newton, US	daily low max	8.9 C (48.0 F)	3.9 C (7.0 F)	115 years	47 of 100 (Notable)
21 May 2015	Oskaloosa, US	daily low max	10.0 C (50.0 F)	3.9 C (7.0 F)	115 years	47 of 100 (Notable)
21 May 2015	Beloit, US	daily low max	12.2 C (54.0 F)	3.9 C (7.0 F)	104 years	47 of 100 (Notable)
21 May 2015	Slutsk, BY	daily rain	32.0 mm (1.3 in)	12.4 mm (0.5 in)	52 years	46 of 100 (Notable)
21 May 2015	Tevriz, RU	daily rain	26.9 mm (1.1 in)	13.2 mm (0.5 in)	22 years	46 of 100 (Notable)
21 May 2015	Effingham 3SW, US	daily low max	10.0 C (50.0 F)	4.4 C (7.9 F)	96 years	46 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 2015

Records set or tied on this calendar date in each year from 1793 to 2015. 2015 had 956 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 2015-05-21: 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 50	787
50 to 100	0
100 to 150	0
150 to 200	0
200 to 250	0
250 to 300	1