Weather Records on 1 May 2004

887 weather records were set or tied worldwide on 1 May 2004. Highest significance: Clausthal-Zellerfeld, DE.

Key Facts for 1 May 2004

On 1 May 2004, 887 weather records were set or tied at long-record stations worldwide.
340 were record highs and 281 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 38 monthly and 849 daily.
Clausthal-Zellerfeld set a daily record precipitation of 39.8 mm (1.6 in) on 1 May 2004.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 440 records.

Record Map

887 stations

887 station records on 1 May 2004 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 2004: highest significance records shown on the map
Station	Country	Type	Value	Significance
Clausthal-Zellerfeld	Germany	Record daily precipitation	39.8 mm (1.6 in)	79 of 100 (Major)
Wilsons Promontory Lighthouse	Australia	Record daily precipitation	66.0 mm (2.6 in)	72 of 100 (Major)
Erfurt-Bindersleben	Germany	Record daily precipitation	40.9 mm (1.6 in)	66 of 100 (Major)
Albany 3 SE	United States	Record daily precipitation	113.8 mm (4.5 in)	63 of 100 (Major)
Corsicana	United States	Record daily precipitation	130.3 mm (5.1 in)	60 of 100 (Major)
Hannover	Germany	Record daily precipitation	29.4 mm (1.2 in)	58 of 100 (Notable)
New Delhi/Safdarjun	India	Record daily precipitation	26.9 mm (1.1 in)	58 of 100 (Notable)
Telpatlan	Mexico	Record daily precipitation	49.8 mm (2.0 in)	58 of 100 (Notable)
Mier Y Noriega (Smn)	Mexico	Record daily precipitation	59.9 mm (2.4 in)	56 of 100 (Notable)
Moreton Telegraph Station	Australia	Record daily precipitation	36.0 mm (1.4 in)	54 of 100 (Notable)
Americus	United States	Record daily precipitation	66.0 mm (2.6 in)	54 of 100 (Notable)
Hildesheim	Germany	Record daily precipitation	56.8 mm (2.2 in)	53 of 100 (Notable)
Hohhot	China	Record daily precipitation	28.7 mm (1.1 in)	52 of 100 (Notable)
Byers 5 ENE	United States	Record daily snowfall	12.7 cm (5.0 in)	51 of 100 (Notable)
Hof	Germany	Record daily precipitation	34.0 mm (1.3 in)	50 of 100 (Notable)
Hool	Mexico	Record daily precipitation	122.4 mm (4.8 in)	50 of 100 (Notable)
Budingen	Germany	Record daily precipitation	32.6 mm (1.3 in)	48 of 100 (Notable)
Chestertown	United States	Record high minimum temperature	21.7 C (71.1 F)	48 of 100 (Notable)
Loma Fina	Mexico	Record daily precipitation	49.8 mm (2.0 in)	47 of 100 (Notable)
Middleburg	United States	Record daily precipitation	46.7 mm (1.8 in)	46 of 100 (Notable)
Castle Rock	United States	Record low maximum temperature	0.6 C (33.1 F)	45 of 100 (Notable)
Galliano	United States	Record daily precipitation	167.6 mm (6.6 in)	45 of 100 (Notable)
Crane	United States	Record low minimum temperature	-3.3 C (26.1 F)	45 of 100 (Notable)
New Rvr McAf	United States	Record daily precipitation	64.0 mm (2.5 in)	45 of 100 (Notable)
Lennestadt-Theten	Germany	Record daily precipitation	33.0 mm (1.3 in)	44 of 100 (Notable)
Juchitan de Zaragoza	Mexico	Record daily precipitation	48.8 mm (1.9 in)	44 of 100 (Notable)
Hodges Gardens	United States	Record daily precipitation	81.3 mm (3.2 in)	44 of 100 (Notable)
Shache	China	Record daily precipitation	34.8 mm (1.4 in)	43 of 100 (Notable)
Middleburg	United States	Record high minimum temperature	20.0 C (68.0 F)	43 of 100 (Notable)
Ulysses 3NE	United States	Record low maximum temperature	7.2 C (45.0 F)	43 of 100 (Notable)
Zamboanga	Philippines	Record daily precipitation	57.2 mm (2.3 in)	42 of 100 (Notable)
Tupper Lake Sunmount	United States	Record high minimum temperature	13.9 C (57.0 F)	42 of 100 (Notable)
Perpignan	France	Record low minimum temperature	4.0 C (39.2 F)	41 of 100 (Notable)
Santiago Tutla	Mexico	Record daily precipitation	103.9 mm (4.1 in)	41 of 100 (Notable)
Rusk	United States	Record daily precipitation	85.1 mm (3.4 in)	41 of 100 (Notable)
Eskridge	United States	Record low maximum temperature	8.9 C (48.0 F)	40 of 100 (Notable)
Cordova AP	United States	Record high minimum temperature	7.2 C (45.0 F)	40 of 100 (Notable)
Buffalo	Australia	Record daily precipitation	36.6 mm (1.4 in)	39 of 100 (Notable)
Ixtepec	Mexico	Record daily precipitation	28.7 mm (1.1 in)	39 of 100 (Notable)
Port Isabel	United States	Record low maximum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Bamboo Creek	Australia	Record daily precipitation	37.8 mm (1.5 in)	38 of 100 (Notable)
Kashi	China	Record daily precipitation	39.9 mm (1.6 in)	38 of 100 (Notable)
San Pedro Cantaros	Mexico	Record low maximum temperature	10.0 C (50.0 F)	38 of 100 (Notable)
Anthony	United States	Record low maximum temperature	11.7 C (53.1 F)	38 of 100 (Notable)
Ayutla	Mexico	Record daily precipitation	30.2 mm (1.2 in)	37 of 100 (Notable)
Greensburg	United States	Record low maximum temperature	6.7 C (44.1 F)	37 of 100 (Notable)
Pawnee City	United States	Record low maximum temperature	8.9 C (48.0 F)	37 of 100 (Notable)
Beaver	United States	Record low maximum temperature	6.7 C (44.1 F)	37 of 100 (Notable)
Graham	United States	Record low minimum temperature	3.3 C (37.9 F)	37 of 100 (Notable)
Mt Vernon	United States	Record daily precipitation	70.4 mm (2.8 in)	37 of 100 (Notable)
Dehradun	India	Record daily precipitation	34.0 mm (1.3 in)	36 of 100 (Notable)
Tajga	Russia	Record low minimum temperature	-15.4 C (4.3 F)	36 of 100 (Notable)
Ft Pierce	United States	Record high minimum temperature	23.9 C (75.0 F)	36 of 100 (Notable)
Bad Sooden-Allendorf	Germany	Record daily precipitation	25.0 mm (1.0 in)	35 of 100 (Notable)
Presa Colorines (Cfe)	Mexico	Record low minimum temperature	10.0 C (50.0 F)	35 of 100 (Notable)
Titusville	United States	Record high minimum temperature	22.2 C (72.0 F)	35 of 100 (Notable)
Wrangell AP	United States	Record high minimum temperature	10.0 C (50.0 F)	35 of 100 (Notable)
Anchorage Merrill Fld	United States	Record high maximum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Kleve	Germany	Record high minimum temperature	12.5 C (54.5 F)	34 of 100 (Routine)
San Carlos	Mexico	Record high maximum temperature	35.0 C (95.0 F)	34 of 100 (Routine)

Counts by Type and Timescale

887 records

Records set or tied on 1 May 2004 by type: Highest daily maximum 142, Lowest daily maximum 175, Highest daily minimum 198, Lowest daily minimum 106, Heaviest daily rainfall 259, Heaviest daily snowfall 5, Deepest snow cover 2.

Records on 1 May 2004 by type
Record type	Records
Highest daily maximum	142
Lowest daily maximum	175
Highest daily minimum	198
Lowest daily minimum	106
Heaviest daily rainfall	259
Heaviest daily snowfall	5
Deepest snow cover	2

Records on 1 May 2004 by timescale: all-time 0, monthly 38, daily 849.

How Much Records Were Beaten By

708 broken records

Margins by which the 708 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 113.2. Ties are not counted.

Top 20 by Significance

1 May 2004

Top 20 records on 1 May 2004 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 2004	Clausthal-Zellerfeld, DE	daily rain	39.8 mm (1.6 in)	26.2 mm (1.0 in)	102 years	79 of 100 (Major)
1 May 2004	Wilsons Promontory Lighthouse, AU	daily rain	66.0 mm (2.6 in)	30.4 mm (1.2 in)	95 years	72 of 100 (Major)
1 May 2004	Erfurt-Bindersleben, DE	daily rain	40.9 mm (1.6 in)	26.4 mm (1.0 in)	65 years	66 of 100 (Major)
1 May 2004	Albany 3 SE, US	daily rain	113.8 mm (4.5 in)	39.6 mm (1.6 in)	95 years	63 of 100 (Major)
1 May 2004	Corsicana, US	daily rain	130.3 mm (5.1 in)	79.5 mm (3.1 in)	38 years	60 of 100 (Major)
1 May 2004	Hannover, DE	daily rain	29.4 mm (1.2 in)	19.4 mm (0.8 in)	49 years	58 of 100 (Notable)
1 May 2004	New Delhi/Safdarjun, IN	daily rain	26.9 mm (1.1 in)	23.3 mm (0.9 in)	70 years	58 of 100 (Notable)
1 May 2004	Telpatlan, MX	daily rain	49.8 mm (2.0 in)	38.1 mm (1.5 in)	45 years	58 of 100 (Notable)
1 May 2004	Mier Y Noriega (Smn), MX	daily rain	59.9 mm (2.4 in)	49.5 mm (1.9 in)	36 years	56 of 100 (Notable)
1 May 2004	Moreton Telegraph Station, AU	daily rain	36.0 mm (1.4 in)	15.7 mm (0.6 in)	59 years	54 of 100 (Notable)
1 May 2004	Americus, US	daily rain	66.0 mm (2.6 in)	21.5 mm (0.8 in)	95 years	54 of 100 (Notable)
1 May 2004	Hildesheim, DE	daily rain	56.8 mm (2.2 in)	49.5 mm (1.9 in)	22 years	53 of 100 (Notable)
1 May 2004	Hohhot, CN	daily rain	28.7 mm (1.1 in)	20.2 mm (0.8 in)	52 years	52 of 100 (Notable)
1 May 2004	Byers 5 ENE, US	monthly snowfall	12.7 cm (5.0 in)	0.5 cm (0.2 in)	110 years	51 of 100 (Notable)
1 May 2004	Hof, DE	daily rain	34.0 mm (1.3 in)	17.5 mm (0.7 in)	45 years	50 of 100 (Notable)
1 May 2004	Hool, MX	daily rain	122.4 mm (4.8 in)	76.9 mm (3.0 in)	27 years	50 of 100 (Notable)
1 May 2004	Budingen, DE	daily rain	32.6 mm (1.3 in)	13.6 mm (0.5 in)	61 years	48 of 100 (Notable)
1 May 2004	Chestertown, US	daily high min	21.7 C (71.1 F)	4.5 C (8.1 F)	93 years	48 of 100 (Notable)
1 May 2004	Loma Fina, MX	daily rain	49.8 mm (2.0 in)	39.9 mm (1.6 in)	38 years	47 of 100 (Notable)
1 May 2004	Middleburg, US	daily rain	46.7 mm (1.8 in)	13.4 mm (0.5 in)	104 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

1795 to 2004

Records set or tied on this calendar date in each year from 1795 to 2004. 2004 had 887 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 2004-05-01: 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 2026-10-16 (16 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 20	653
20 to 40	40
40 to 60	10
60 to 80	4
80 to 100	0
100 to 120	1