Weather Records on 1 May 2003

964 weather records were set or tied worldwide on 1 May 2003. Highest significance: Aledo, US.

Key Facts for 1 May 2003

On 1 May 2003, 964 weather records were set or tied at long-record stations worldwide.
460 were record highs and 90 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 44 monthly and 915 daily.
Aledo set a monthly record daily precipitation of 121.9 mm (4.8 in) on 1 May 2003.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 439 records.

Record Map

964 stations

964 station records on 1 May 2003 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 2003: highest significance records shown on the map
Station	Country	Type	Value	Significance
Aledo	United States	Record daily precipitation	121.9 mm (4.8 in)	68 of 100 (Major)
Peake	Australia	Record daily precipitation	34.0 mm (1.3 in)	66 of 100 (Major)
Kewanee 1E	United States	Record daily precipitation	64.3 mm (2.5 in)	62 of 100 (Major)
Worland	United States	Record daily precipitation	30.7 mm (1.2 in)	62 of 100 (Major)
Narrung (Yalkuri)	Australia	Record daily precipitation	30.0 mm (1.2 in)	60 of 100 (Major)
New Boston Dam 17	United States	Record daily precipitation	128.0 mm (5.0 in)	57 of 100 (Notable)
Yankalilla	Australia	Record daily precipitation	31.6 mm (1.2 in)	55 of 100 (Notable)
Finniss	Australia	Record daily precipitation	35.0 mm (1.4 in)	54 of 100 (Notable)
Kailua 446	United States	Record low minimum temperature	12.8 C (55.0 F)	54 of 100 (Notable)
Lampang	Thailand	Record daily precipitation	91.7 mm (3.6 in)	53 of 100 (Notable)
Normanville	Australia	Record daily precipitation	26.0 mm (1.0 in)	52 of 100 (Notable)
Juupajoki Hyytiala	Finland	Record daily precipitation	27.8 mm (1.1 in)	52 of 100 (Notable)
Harrison Gulch Rs	United States	Record daily precipitation	107.4 mm (4.2 in)	51 of 100 (Notable)
Three Rivers	United States	Record daily precipitation	52.8 mm (2.1 in)	51 of 100 (Notable)
Fairmont	United States	Record daily precipitation	37.6 mm (1.5 in)	51 of 100 (Notable)
Beloit	United States	Record daily precipitation	43.2 mm (1.7 in)	51 of 100 (Notable)
Celo 2 S	United States	Record daily precipitation	83.6 mm (3.3 in)	49 of 100 (Notable)
Transou	United States	Record daily precipitation	100.3 mm (3.9 in)	49 of 100 (Notable)
Joutsa Mieskonmaki Kala	Finland	Record daily precipitation	29.1 mm (1.1 in)	48 of 100 (Notable)
Kangasniemi Kirkonkyla	Finland	Record daily precipitation	30.5 mm (1.2 in)	48 of 100 (Notable)
Aurora Water	United States	Record daily precipitation	57.4 mm (2.3 in)	46 of 100 (Notable)
Santo Domingo	Mexico	Record low minimum temperature	10.6 C (51.1 F)	45 of 100 (Notable)
Ica	Russia	Record daily precipitation	44.8 mm (1.8 in)	45 of 100 (Notable)
Wapello	United States	Record daily precipitation	85.6 mm (3.4 in)	45 of 100 (Notable)
Elgin Water	United States	Record daily precipitation	59.4 mm (2.3 in)	44 of 100 (Notable)
Burnet	United States	Record high minimum temperature	22.8 C (73.0 F)	44 of 100 (Notable)
Charlotte Court House	United States	Record daily precipitation	50.8 mm (2.0 in)	44 of 100 (Notable)
San Jose de Raices	Mexico	Record high minimum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Petropavlovsk-Kamchatskij	Russia	Record daily precipitation	35.1 mm (1.4 in)	43 of 100 (Notable)
Nikolskoye/Beringa Ostrov	Russia	Record high maximum temperature	6.8 C (44.2 F)	43 of 100 (Notable)
W Allis	United States	Record daily precipitation	42.9 mm (1.7 in)	43 of 100 (Notable)
Koylio Yttila	Finland	Record daily precipitation	26.0 mm (1.0 in)	42 of 100 (Notable)
Padasjoki Syrjantaka	Finland	Record daily precipitation	26.3 mm (1.0 in)	41 of 100 (Notable)
Petropavlovskij Majak	Russia	Record daily precipitation	26.9 mm (1.1 in)	41 of 100 (Notable)
Svenska Hogarna	Sweden	Record daily precipitation	25.3 mm (1.0 in)	41 of 100 (Notable)
Oconomowoc Wwtp	United States	Record daily precipitation	56.9 mm (2.2 in)	41 of 100 (Notable)
Ylojarvi Metsakyla	Finland	Record daily precipitation	25.3 mm (1.0 in)	40 of 100 (Notable)
Chiang Mai	Thailand	Record daily precipitation	84.1 mm (3.3 in)	40 of 100 (Notable)
Lowell	United States	Record daily precipitation	57.2 mm (2.3 in)	40 of 100 (Notable)
Arcadia	United States	Record daily precipitation	39.4 mm (1.6 in)	40 of 100 (Notable)
Beaver Dam Wwtp	United States	Record daily precipitation	29.5 mm (1.2 in)	40 of 100 (Notable)
Gull Lake Biological STN	United States	Record daily precipitation	45.0 mm (1.8 in)	39 of 100 (Notable)
Mt Airy 2 W	United States	Record daily precipitation	45.2 mm (1.8 in)	39 of 100 (Notable)
Cape Leeuwin	Australia	Record high maximum temperature	28.7 C (83.7 F)	38 of 100 (Notable)
Pecs Pogany	Hungary	Record high minimum temperature	18.4 C (65.1 F)	38 of 100 (Notable)
Tlacualera	Mexico	Record high maximum temperature	33.9 C (93.0 F)	38 of 100 (Notable)
De Kalb	United States	Record daily precipitation	57.7 mm (2.3 in)	38 of 100 (Notable)
Keithsburg	United States	Record daily precipitation	69.1 mm (2.7 in)	38 of 100 (Notable)
Ionia 2SSW	United States	Record daily precipitation	41.1 mm (1.6 in)	38 of 100 (Notable)
Hindmarsh Valley (Fernbrook)	Australia	Record daily precipitation	38.4 mm (1.5 in)	37 of 100 (Notable)
Kokemaki Askola	Finland	Record daily precipitation	25.0 mm (1.0 in)	37 of 100 (Notable)
Husaro	Sweden	Record daily precipitation	25.0 mm (1.0 in)	37 of 100 (Notable)
Tavernier	United States	Record daily precipitation	167.6 mm (6.6 in)	37 of 100 (Notable)
Postville	United States	Record daily precipitation	33.8 mm (1.3 in)	37 of 100 (Notable)
Saint Johns	United States	Record daily precipitation	43.9 mm (1.7 in)	37 of 100 (Notable)
Yadkin College	United States	Record daily precipitation	43.7 mm (1.7 in)	37 of 100 (Notable)
Dutch Harbor	United States	Record high minimum temperature	6.1 C (43.0 F)	37 of 100 (Notable)
Muskegon Co AP	United States	Record daily precipitation	30.2 mm (1.2 in)	37 of 100 (Notable)
Coahuayutla	Mexico	Record low minimum temperature	10.0 C (50.0 F)	36 of 100 (Notable)
El-Golea	Algeria	Record high minimum temperature	25.4 C (77.7 F)	35 of 100 (Notable)

Counts by Type and Timescale

964 records

Records set or tied on 1 May 2003 by type: Highest daily maximum 221, Lowest daily maximum 29, Highest daily minimum 239, Lowest daily minimum 61, Heaviest daily rainfall 407, Heaviest daily snowfall 7.

Records on 1 May 2003 by type
Record type	Records
Highest daily maximum	221
Lowest daily maximum	29
Highest daily minimum	239
Lowest daily minimum	61
Heaviest daily rainfall	407
Heaviest daily snowfall	7
Deepest snow cover	0

Records on 1 May 2003 by timescale: all-time 5, monthly 44, daily 915.

How Much Records Were Beaten By

766 broken records

Margins by which the 766 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 67.6. Ties are not counted.

Top 20 by Significance

1 May 2003

Top 20 records on 1 May 2003 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 2003	Aledo, US	monthly rain	121.9 mm (4.8 in)	33.0 mm (1.3 in)	64 years	68 of 100 (Major)
1 May 2003	Peake, AU	daily rain	34.0 mm (1.3 in)	19.5 mm (0.8 in)	76 years	66 of 100 (Major)
1 May 2003	Kewanee 1E, US	daily rain	64.3 mm (2.5 in)	48.3 mm (1.9 in)	54 years	62 of 100 (Major)
1 May 2003	Worland, US	daily rain	30.7 mm (1.2 in)	22.8 mm (0.9 in)	52 years	62 of 100 (Major)
1 May 2003	Narrung (Yalkuri), AU	daily rain	30.0 mm (1.2 in)	15.3 mm (0.6 in)	69 years	60 of 100 (Major)
1 May 2003	New Boston Dam 17, US	monthly rain	128.0 mm (5.0 in)	31.2 mm (1.2 in)	51 years	57 of 100 (Notable)
1 May 2003	Yankalilla, AU	daily rain	31.6 mm (1.2 in)	18.9 mm (0.7 in)	69 years	55 of 100 (Notable)
1 May 2003	Finniss, AU	daily rain	35.0 mm (1.4 in)	12.6 mm (0.5 in)	69 years	54 of 100 (Notable)
1 May 2003	Kailua 446, US	daily low min	12.8 C (55.0 F)	2.2 C (4.0 F)	96 years	54 of 100 (Notable)
1 May 2003	Lampang, TH	daily rain	91.7 mm (3.6 in)	67.6 mm (2.7 in)	26 years	53 of 100 (Notable)
1 May 2003	Normanville, AU	daily rain	26.0 mm (1.0 in)	12.3 mm (0.5 in)	76 years	52 of 100 (Notable)
1 May 2003	Juupajoki Hyytiala, FI	daily rain	27.8 mm (1.1 in)	19.4 mm (0.8 in)	29 years	52 of 100 (Notable)
1 May 2003	Harrison Gulch Rs, US	monthly rain	107.4 mm (4.2 in)	30.2 mm (1.2 in)	8 years	51 of 100 (Notable)
1 May 2003	Three Rivers, US	daily rain	52.8 mm (2.1 in)	23.3 mm (0.9 in)	62 years	51 of 100 (Notable)
1 May 2003	Fairmont, US	daily rain	37.6 mm (1.5 in)	12.2 mm (0.5 in)	93 years	51 of 100 (Notable)
1 May 2003	Beloit, US	daily rain	43.2 mm (1.7 in)	14.2 mm (0.6 in)	94 years	51 of 100 (Notable)
1 May 2003	Celo 2 S, US	daily rain	83.6 mm (3.3 in)	62.5 mm (2.5 in)	13 years	49 of 100 (Notable)
1 May 2003	Transou, US	daily rain	100.3 mm (3.9 in)	61.9 mm (2.4 in)	13 years	49 of 100 (Notable)
1 May 2003	Joutsa Mieskonmaki Kala, FI	daily rain	29.1 mm (1.1 in)	18.6 mm (0.7 in)	17 years	48 of 100 (Notable)
1 May 2003	Kangasniemi Kirkonkyla, FI	daily rain	30.5 mm (1.2 in)	21.5 mm (0.8 in)	17 years	48 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

1795 to 2003

Records set or tied on this calendar date in each year from 1795 to 2003. 2003 had 964 records.

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

Records on 05-01 in each year
Year	Records
1795	1
1802	1
1804	1
1814	1
1818	1
1835	1
1836	1
1840	1
1846	2
1847	1
1850	1
1851	1
1857	1
1860	1
1861	1
1864	2
1865	1
1868	2
1872	1
1875	4
1878	2
1879	2
1880	3
1881	2
1884	1
1885	1
1886	2
1887	2
1888	2
1889	3
1890	2
1891	5
1892	6
1893	2
1894	5
1896	1
1897	4
1898	1
1899	8
1900	1
1901	5
1902	7
1903	9
1904	9
1905	13
1906	12
1907	31
1908	20
1909	49
1910	13
1911	22
1912	18
1913	54
1914	23
1915	27
1916	27
1917	37
1918	34
1919	150
1920	186
1921	41
1922	92
1923	64
1924	63
1925	118
1926	500
1927	125
1928	190
1929	142
1930	263
1931	537
1932	220
1933	706
1934	305
1935	276
1936	368
1937	218
1938	304
1939	227
1940	731
1941	333
1942	1,036
1943	526
1944	229
1945	350
1946	415
1947	655
1948	774
1949	405
1950	439
1951	894
1952	557
1953	917
1954	1,506
1955	772
1956	1,106
1957	359
1958	448
1959	764
1960	737
1961	588
1962	615
1963	704
1964	312
1965	360
1966	707
1967	948
1968	426
1969	429
1970	1,075
1971	444
1972	562
1973	841
1974	589
1975	286
1976	673
1977	545
1978	1,202
1979	612
1980	507
1981	1,265
1982	508
1983	1,423
1984	640
1985	789
1986	512
1987	1,098
1988	1,058
1989	949
1990	922
1991	633
1992	1,201
1993	1,101
1994	1,210
1995	1,365
1996	1,439
1997	804
1998	951
1999	932
2000	809
2001	1,106
2002	1,221
2003	964
2004	887
2005	1,320
2006	734
2007	857
2008	979
2009	679
2010	1,151
2011	716
2012	796
2013	976
2014	941
2015	550
2016	844
2017	1,163
2018	519
2019	788
2020	1,099
2021	834
2022	319
2023	912
2024	458
2025	430
2026	623

Download the Data

Data for records on 2003-05-01: 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	641
10 to 20	92
20 to 30	21
30 to 40	6
40 to 50	1
50 to 60	2
60 to 70	3