Weather Records on 20 May 2004

746 weather records were set or tied worldwide on 20 May 2004. Highest significance: Beatrice Hill, AU.

Key Facts for 20 May 2004

On 20 May 2004, 746 weather records were set or tied at long-record stations worldwide.
451 were record highs and 148 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 27 monthly and 718 daily.
Beatrice Hill set a daily record precipitation of 36.0 mm (1.4 in) on 20 May 2004.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 454 records.

Record Map

746 stations

746 station records on 20 May 2004 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 2004: highest significance records shown on the map
Station	Country	Type	Value	Significance
Beatrice Hill	Australia	Record daily precipitation	36.0 mm (1.4 in)	74 of 100 (Major)
Naalehu 14	United States	Record daily precipitation	50.3 mm (2.0 in)	71 of 100 (Major)
Faribault	United States	Record daily precipitation	52.1 mm (2.1 in)	56 of 100 (Notable)
Iowa City	United States	Record high minimum temperature	23.9 C (75.0 F)	52 of 100 (Notable)
Manoa Tun 2 716	United States	Record daily precipitation	165.1 mm (6.5 in)	52 of 100 (Notable)
Ashland	United States	Record high maximum temperature	40.6 C (105.1 F)	48 of 100 (Notable)
Kapapala Rch 36	United States	Record daily precipitation	56.4 mm (2.2 in)	48 of 100 (Notable)
Inverness 3 SE	United States	Record low minimum temperature	9.4 C (48.9 F)	47 of 100 (Notable)
Opihihale #2 24.1	United States	Record daily precipitation	71.6 mm (2.8 in)	47 of 100 (Notable)
Tomsk	Russia	Record high minimum temperature	18.5 C (65.3 F)	46 of 100 (Notable)
Ocosingo	Mexico	Record low maximum temperature	20.0 C (68.0 F)	44 of 100 (Notable)
Chippewa Lake	United States	Record daily precipitation	31.2 mm (1.2 in)	44 of 100 (Notable)
Ewa Plantation 741	United States	Record low minimum temperature	14.4 C (57.9 F)	44 of 100 (Notable)
Oenpelli	Australia	Record daily precipitation	46.2 mm (1.8 in)	43 of 100 (Notable)
Magueyes Is	Puerto Rico [United States]	Record low maximum temperature	25.6 C (78.1 F)	43 of 100 (Notable)
Keosauqua	United States	Record high minimum temperature	21.7 C (71.1 F)	43 of 100 (Notable)
Beaver Dam Wwtp	United States	Record daily precipitation	45.0 mm (1.8 in)	43 of 100 (Notable)
Dalton	United States	Record daily precipitation	46.0 mm (1.8 in)	43 of 100 (Notable)
Cedar Rapids #1	United States	Record high minimum temperature	20.6 C (69.1 F)	42 of 100 (Notable)
Steffenville	United States	Record high minimum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Pixoyal (Smn)	Mexico	Record daily precipitation	74.9 mm (2.9 in)	41 of 100 (Notable)
Bomnak	Russia	Record low maximum temperature	2.1 C (35.8 F)	41 of 100 (Notable)
Aurora Water	United States	Record high minimum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Carlinville	United States	Record high minimum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Ft Madison	United States	Record high minimum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Zumbrota	United States	Record daily precipitation	57.7 mm (2.3 in)	41 of 100 (Notable)
Greenville Kgvl Radio	United States	Record high minimum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Xochitlan Todos Santos	Mexico	Record high minimum temperature	18.9 C (66.0 F)	40 of 100 (Notable)
La Concha	Mexico	Record low maximum temperature	26.7 C (80.1 F)	40 of 100 (Notable)
Balfour	Australia	Record daily precipitation	28.8 mm (1.1 in)	39 of 100 (Notable)
Khartoum	Sudan	Record daily precipitation	62.2 mm (2.4 in)	39 of 100 (Notable)
Mae Sot	Thailand	Record daily precipitation	108.5 mm (4.3 in)	39 of 100 (Notable)
Cottonwood Falls	United States	Record high minimum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Escarcega (Smn)	Mexico	Record daily precipitation	63.8 mm (2.5 in)	37 of 100 (Notable)
Port Washington	United States	Record daily precipitation	28.7 mm (1.1 in)	37 of 100 (Notable)
Union de San Antonio	Mexico	Record low minimum temperature	5.6 C (42.1 F)	36 of 100 (Notable)
Luroy	Norway	Record daily precipitation	63.6 mm (2.5 in)	36 of 100 (Notable)
Arnett 3NE	United States	Record high maximum temperature	37.2 C (99.0 F)	36 of 100 (Notable)
Buffalo 2 SSW	United States	Record high maximum temperature	40.0 C (104.0 F)	36 of 100 (Notable)
Middle Point	Australia	Record daily precipitation	38.1 mm (1.5 in)	35 of 100 (Notable)
Miyakejima	Japan	Record daily precipitation	110.0 mm (4.3 in)	35 of 100 (Notable)
Olenja Rechka	Russia	Record high minimum temperature	11.0 C (51.8 F)	35 of 100 (Notable)
Horicon Wwtp	United States	Record daily precipitation	44.7 mm (1.8 in)	35 of 100 (Notable)
Kalumburu Mission	Australia	Record high minimum temperature	26.4 C (79.5 F)	34 of 100 (Routine)
Semej	Kazakhstan	Record high minimum temperature	19.2 C (66.6 F)	34 of 100 (Routine)
Presa Colorines (Cfe)	Mexico	Record low minimum temperature	10.6 C (51.1 F)	34 of 100 (Routine)
Manati 2 E	Puerto Rico [United States]	Record low maximum temperature	27.2 C (81.0 F)	34 of 100 (Routine)
Uttaradit	Thailand	Record low maximum temperature	27.2 C (81.0 F)	34 of 100 (Routine)
Ulysses 3NE	United States	Record high maximum temperature	38.9 C (102.0 F)	34 of 100 (Routine)
Miami	United States	Record high maximum temperature	37.8 C (100.0 F)	34 of 100 (Routine)
Ripon 5 NE	United States	Record daily precipitation	49.8 mm (2.0 in)	34 of 100 (Routine)
Tacambaro	Mexico	Record high minimum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Dorchester	United States	Record daily precipitation	43.2 mm (1.7 in)	33 of 100 (Routine)
Greensburg	United States	Record high maximum temperature	37.2 C (99.0 F)	33 of 100 (Routine)
Scott City	United States	Record high maximum temperature	37.8 C (100.0 F)	33 of 100 (Routine)
Sublette 7WSW	United States	Record high maximum temperature	38.3 C (100.9 F)	33 of 100 (Routine)
Arnett 3NE	United States	Record high minimum temperature	19.4 C (66.9 F)	33 of 100 (Routine)
Joquicingo	Mexico	Record low maximum temperature	13.3 C (55.9 F)	32 of 100 (Routine)
Zmeinogorsk	Russia	Record high maximum temperature	35.4 C (95.7 F)	32 of 100 (Routine)
San Sebastian - Igueldo	Spain	Record high minimum temperature	19.6 C (67.3 F)	32 of 100 (Routine)

Counts by Type and Timescale

746 records

Records set or tied on 20 May 2004 by type: Highest daily maximum 194, Lowest daily maximum 69, Highest daily minimum 257, Lowest daily minimum 79, Heaviest daily rainfall 146, Deepest snow cover 1.

Records on 20 May 2004 by type
Record type	Records
Highest daily maximum	194
Lowest daily maximum	69
Highest daily minimum	257
Lowest daily minimum	79
Heaviest daily rainfall	146
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 20 May 2004 by timescale: all-time 1, monthly 27, daily 718.

How Much Records Were Beaten By

574 broken records

Margins by which the 574 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 114.3. Ties are not counted.

Top 20 by Significance

20 May 2004

Top 20 records on 20 May 2004 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 2004	Beatrice Hill, AU	daily rain	36.0 mm (1.4 in)	36.0 mm (1.4 in)	117 years	74 of 100 (Major)
20 May 2004	Naalehu 14, US	daily rain	50.3 mm (2.0 in)	30.5 mm (1.2 in)	93 years	71 of 100 (Major)
20 May 2004	Faribault, US	daily rain	52.1 mm (2.1 in)	18.6 mm (0.7 in)	95 years	56 of 100 (Notable)
20 May 2004	Iowa City, US	monthly high min	23.9 C (75.0 F)	1.1 C (2.0 F)	107 years	52 of 100 (Notable)
20 May 2004	Manoa Tun 2 716, US	daily rain	165.1 mm (6.5 in)	114.3 mm (4.5 in)	21 years	52 of 100 (Notable)
20 May 2004	Ashland, US	monthly high max	40.6 C (105.1 F)	0.6 C (1.1 F)	90 years	48 of 100 (Notable)
20 May 2004	Kapapala Rch 36, US	daily rain	56.4 mm (2.2 in)	48.0 mm (1.9 in)	10 years	48 of 100 (Notable)
20 May 2004	Inverness 3 SE, US	daily low min	9.4 C (48.9 F)	3.4 C (6.1 F)	87 years	47 of 100 (Notable)
20 May 2004	Opihihale #2 24.1, US	daily rain	71.6 mm (2.8 in)	42.9 mm (1.7 in)	13 years	47 of 100 (Notable)
20 May 2004	Tomsk, RU	monthly high min	18.5 C (65.3 F)	0.2 C (0.4 F)	87 years	46 of 100 (Notable)
20 May 2004	Ocosingo, MX	daily low max	20.0 C (68.0 F)	8.9 C (16.0 F)	37 years	44 of 100 (Notable)
20 May 2004	Chippewa Lake, US	daily rain	31.2 mm (1.2 in)	3.8 mm (0.15 in)	106 years	44 of 100 (Notable)
20 May 2004	Ewa Plantation 741, US	daily low min	14.4 C (57.9 F)	1.7 C (3.1 F)	79 years	44 of 100 (Notable)
20 May 2004	Oenpelli, AU	daily rain	46.2 mm (1.8 in)	38.4 mm (1.5 in)	23 years	43 of 100 (Notable)
20 May 2004	Magueyes Is, PR	daily low max	25.6 C (78.1 F)	3.8 C (6.8 F)	45 years	43 of 100 (Notable)
20 May 2004	Keosauqua, US	daily high min	21.7 C (71.1 F)	1.7 C (3.1 F)	102 years	43 of 100 (Notable)
20 May 2004	Beaver Dam Wwtp, US	daily rain	45.0 mm (1.8 in)	28.2 mm (1.1 in)	19 years	43 of 100 (Notable)
20 May 2004	Dalton, US	daily rain	46.0 mm (1.8 in)	24.4 mm (1.0 in)	45 years	43 of 100 (Notable)
20 May 2004	Cedar Rapids #1, US	daily high min	20.6 C (69.1 F)	1.2 C (2.2 F)	102 years	42 of 100 (Notable)
20 May 2004	Steffenville, US	daily high min	22.2 C (72.0 F)	1.1 C (2.0 F)	102 years	42 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

1802 to 2004

Records set or tied on this calendar date in each year from 1802 to 2004. 2004 had 746 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 2004-05-20: 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 20	551
20 to 40	15
40 to 60	7
60 to 80	0
80 to 100	0
100 to 120	1