Weather Records on 21 May 2003

807 weather records were set or tied worldwide on 21 May 2003. Highest significance: Roosevelt Roads, PR.

Key Facts for 21 May 2003

On 21 May 2003, 807 weather records were set or tied at long-record stations worldwide.
405 were record highs and 238 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 24 monthly and 781 daily.
Roosevelt Roads set a daily record precipitation of 147.6 mm (5.8 in) on 21 May 2003.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 458 records.

Record Map

807 stations

807 station records on 21 May 2003 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 2003: highest significance records shown on the map
Station	Country	Type	Value	Significance
Roosevelt Roads	Puerto Rico [United States]	Record daily precipitation	147.6 mm (5.8 in)	52 of 100 (Notable)
Oneonta	United States	Record daily precipitation	50.8 mm (2.0 in)	51 of 100 (Notable)
Sylacauga 4 NE	United States	Record daily precipitation	58.4 mm (2.3 in)	51 of 100 (Notable)
Setauket Strong	United States	Record daily precipitation	63.5 mm (2.5 in)	50 of 100 (Notable)
San Jose de Raices	Mexico	Record high minimum temperature	22.8 C (73.0 F)	48 of 100 (Notable)
Nemours (Ghazaouet)	Algeria	Record high minimum temperature	19.4 C (66.9 F)	47 of 100 (Notable)
Chatom	United States	Record daily precipitation	91.4 mm (3.6 in)	47 of 100 (Notable)
Sanderson	United States	Record low maximum temperature	17.8 C (64.0 F)	47 of 100 (Notable)
Oak Hill	United States	Record daily precipitation	48.3 mm (1.9 in)	47 of 100 (Notable)
Renison Bell	Australia	Record daily precipitation	48.2 mm (1.9 in)	46 of 100 (Notable)
Tionesta 2 SE Lake	United States	Record daily precipitation	35.1 mm (1.4 in)	46 of 100 (Notable)
Pauls Valley 4 WSW	United States	Record low maximum temperature	16.1 C (61.0 F)	45 of 100 (Notable)
Logan	United States	Record daily precipitation	51.8 mm (2.0 in)	45 of 100 (Notable)
Kittila Pulju	Finland	Record daily precipitation	37.3 mm (1.5 in)	43 of 100 (Notable)
Hope	United States	Record low maximum temperature	12.2 C (54.0 F)	43 of 100 (Notable)
Coleman	United States	Record low maximum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Van Horn	United States	Record low maximum temperature	13.9 C (57.0 F)	43 of 100 (Notable)
Aibonito 1 S	Puerto Rico [United States]	Record daily precipitation	75.7 mm (3.0 in)	42 of 100 (Notable)
Troy	United States	Record low maximum temperature	18.9 C (66.0 F)	41 of 100 (Notable)
Mt Ayr	United States	Record low maximum temperature	14.4 C (57.9 F)	41 of 100 (Notable)
Carlsbad	United States	Record low maximum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Menard	United States	Record low maximum temperature	16.1 C (61.0 F)	41 of 100 (Notable)
Gielas	Sweden	Record daily precipitation	30.1 mm (1.2 in)	40 of 100 (Notable)
Bay Minette	United States	Record daily precipitation	70.6 mm (2.8 in)	40 of 100 (Notable)
Gail	United States	Record low maximum temperature	16.7 C (62.1 F)	40 of 100 (Notable)
Olekminsk	Russia	Record low minimum temperature	-5.3 C (22.5 F)	39 of 100 (Notable)
San Luis Obispo Poly	United States	Record high minimum temperature	17.2 C (63.0 F)	39 of 100 (Notable)
Kane 1NNE	United States	Record daily precipitation	31.8 mm (1.3 in)	39 of 100 (Notable)
Crane	United States	Record low maximum temperature	14.4 C (57.9 F)	39 of 100 (Notable)
Ft Stockton	United States	Record low maximum temperature	13.9 C (57.0 F)	39 of 100 (Notable)
Seminole	United States	Record low maximum temperature	12.2 C (54.0 F)	39 of 100 (Notable)
El Vergel (Smn)	Mexico	Record daily precipitation	35.8 mm (1.4 in)	38 of 100 (Notable)
Yates Ctr	United States	Record low maximum temperature	17.2 C (63.0 F)	38 of 100 (Notable)
Franklin	United States	Record daily precipitation	48.3 mm (1.9 in)	38 of 100 (Notable)
Ballinger 2 NW	United States	Record low maximum temperature	15.0 C (59.0 F)	38 of 100 (Notable)
Gatesville	United States	Record low maximum temperature	19.4 C (66.9 F)	38 of 100 (Notable)
Aibonito 1 S	Puerto Rico [United States]	Record low maximum temperature	22.8 C (73.0 F)	37 of 100 (Notable)
Carlsbad Caverns	United States	Record low maximum temperature	9.4 C (48.9 F)	37 of 100 (Notable)
Colorado City	United States	Record low maximum temperature	15.0 C (59.0 F)	37 of 100 (Notable)
Dutch Harbor	United States	Record high minimum temperature	6.1 C (43.0 F)	37 of 100 (Notable)
Cave Run Lake	United States	Record daily precipitation	28.7 mm (1.1 in)	36 of 100 (Notable)
San Miguel Ejutla	Mexico	Record high minimum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Lainio	Sweden	Record daily precipitation	29.3 mm (1.2 in)	34 of 100 (Routine)
Mukdahan	Thailand	Record daily precipitation	82.8 mm (3.3 in)	34 of 100 (Routine)
Augusta	United States	Record low minimum temperature	-5.0 C (23.0 F)	33 of 100 (Routine)
Albany	United States	Record low maximum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Spur	United States	Record low maximum temperature	16.7 C (62.1 F)	33 of 100 (Routine)
San Angelo	United States	Record low maximum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Vardoe	Norway	Record high minimum temperature	7.4 C (45.3 F)	32 of 100 (Routine)
Porto Santo	Portugal	Record high maximum temperature	27.0 C (80.6 F)	32 of 100 (Routine)
Lanzarote/Aeropuerto	Spain	Record high minimum temperature	22.6 C (72.7 F)	32 of 100 (Routine)
Mosquito Creek Lake	United States	Record daily precipitation	33.0 mm (1.3 in)	32 of 100 (Routine)
New Lexington 2 NW	United States	Record daily precipitation	32.5 mm (1.3 in)	32 of 100 (Routine)
Brownfield	United States	Record low maximum temperature	13.3 C (55.9 F)	32 of 100 (Routine)
Eastland	United States	Record low maximum temperature	15.0 C (59.0 F)	32 of 100 (Routine)
El Campo	United States	Record high maximum temperature	36.1 C (97.0 F)	32 of 100 (Routine)
Rock Mills	United States	Record daily precipitation	60.2 mm (2.4 in)	31 of 100 (Routine)
Organ Pipe Cactus Nm	United States	Record high minimum temperature	26.1 C (79.0 F)	31 of 100 (Routine)
Wichita Mtn Wr	United States	Record low maximum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Lamesa 1 SSE	United States	Record low maximum temperature	12.2 C (54.0 F)	31 of 100 (Routine)

Counts by Type and Timescale

807 records

Records set or tied on 21 May 2003 by type: Highest daily maximum 205, Lowest daily maximum 169, Highest daily minimum 200, Lowest daily minimum 69, Heaviest daily rainfall 164.

Records on 21 May 2003 by type
Record type	Records
Highest daily maximum	205
Lowest daily maximum	169
Highest daily minimum	200
Lowest daily minimum	69
Heaviest daily rainfall	164
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 May 2003 by timescale: all-time 2, monthly 24, daily 781.

How Much Records Were Beaten By

583 broken records

Margins by which the 583 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 68.1. Ties are not counted.

Top 20 by Significance

21 May 2003

Top 20 records on 21 May 2003 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 2003	Roosevelt Roads, PR	daily rain	147.6 mm (5.8 in)	68.1 mm (2.7 in)	33 years	52 of 100 (Notable)
21 May 2003	Oneonta, US	daily rain	50.8 mm (2.0 in)	18.8 mm (0.7 in)	106 years	51 of 100 (Notable)
21 May 2003	Sylacauga 4 NE, US	daily rain	58.4 mm (2.3 in)	45.4 mm (1.8 in)	48 years	51 of 100 (Notable)
21 May 2003	Setauket Strong, US	daily rain	63.5 mm (2.5 in)	27.9 mm (1.1 in)	48 years	50 of 100 (Notable)
21 May 2003	San Jose de Raices, MX	daily high min	22.8 C (73.0 F)	7.8 C (14.0 F)	60 years	48 of 100 (Notable)
21 May 2003	Nemours (Ghazaouet), DZ	daily high min	19.4 C (66.9 F)	2.4 C (4.3 F)	90 years	47 of 100 (Notable)
21 May 2003	Chatom, US	daily rain	91.4 mm (3.6 in)	63.5 mm (2.5 in)	36 years	47 of 100 (Notable)
21 May 2003	Sanderson, US	daily low max	17.8 C (64.0 F)	3.3 C (5.9 F)	102 years	47 of 100 (Notable)
21 May 2003	Oak Hill, US	daily rain	48.3 mm (1.9 in)	30.3 mm (1.2 in)	22 years	47 of 100 (Notable)
21 May 2003	Renison Bell, AU	daily rain	48.2 mm (1.9 in)	12.9 mm (0.5 in)	85 years	46 of 100 (Notable)
21 May 2003	Tionesta 2 SE Lake, US	daily rain	35.1 mm (1.4 in)	12.7 mm (0.5 in)	80 years	46 of 100 (Notable)
21 May 2003	Pauls Valley 4 WSW, US	daily low max	16.1 C (61.0 F)	2.2 C (4.0 F)	102 years	45 of 100 (Notable)
21 May 2003	Logan, US	daily rain	51.8 mm (2.0 in)	16.7 mm (0.7 in)	68 years	45 of 100 (Notable)
21 May 2003	Kittila Pulju, FI	monthly rain	37.3 mm (1.5 in)	8.9 mm (0.35 in)	28 years	43 of 100 (Notable)
21 May 2003	Hope, US	daily low max	12.2 C (54.0 F)	6.1 C (11.0 F)	73 years	43 of 100 (Notable)
21 May 2003	Coleman, US	daily low max	15.6 C (60.1 F)	1.6 C (2.9 F)	102 years	43 of 100 (Notable)
21 May 2003	Van Horn, US	daily low max	13.9 C (57.0 F)	7.8 C (14.0 F)	60 years	43 of 100 (Notable)
21 May 2003	Aibonito 1 S, PR	daily rain	75.7 mm (3.0 in)	24.9 mm (1.0 in)	61 years	42 of 100 (Notable)
21 May 2003	Troy, US	daily low max	18.9 C (66.0 F)	2.8 C (5.0 F)	84 years	41 of 100 (Notable)
21 May 2003	Mt Ayr, US	daily low max	14.4 C (57.9 F)	0.6 C (1.1 F)	103 years	41 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 2003

Records set or tied on this calendar date in each year from 1793 to 2003. 2003 had 807 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 2003-05-21: 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 2026-10-13 (13 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	539
10 to 20	26
20 to 30	11
30 to 40	4
40 to 50	1
50 to 60	0
60 to 70	2