Weather Records on 21 April 2004

586 weather records were set or tied worldwide on 21 April 2004. Highest significance: Napoopoo 28, US.

Key Facts for 21 April 2004

On 21 April 2004, 586 weather records were set or tied at long-record stations worldwide.
294 were record highs and 116 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 24 monthly and 562 daily.
Napoopoo 28 set a monthly record daily precipitation of 86.9 mm (3.4 in) on 21 April 2004.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 461 records.

Record Map

586 stations

586 station records on 21 April 2004 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 2004: highest significance records shown on the map
Station	Country	Type	Value	Significance
Napoopoo 28	United States	Record daily precipitation	86.9 mm (3.4 in)	69 of 100 (Major)
Antalya	Turkey	Record daily precipitation	188.0 mm (7.4 in)	57 of 100 (Notable)
Kealakekua 26.2	United States	Record daily precipitation	33.8 mm (1.3 in)	50 of 100 (Notable)
Ulupalakua Rch 250	United States	Record daily precipitation	130.0 mm (5.1 in)	47 of 100 (Notable)
Gasquet Rs	United States	Record daily precipitation	74.9 mm (2.9 in)	46 of 100 (Notable)
Laketown	United States	Record daily snowfall	15.2 cm (6.0 in)	45 of 100 (Notable)
W Lawai 931	United States	Record daily precipitation	43.2 mm (1.7 in)	43 of 100 (Notable)
Nogliki	Russia	Record daily precipitation	25.8 mm (1.0 in)	41 of 100 (Notable)
Keo	United States	Record daily precipitation	90.2 mm (3.6 in)	41 of 100 (Notable)
Kirksville	United States	Record daily precipitation	53.3 mm (2.1 in)	41 of 100 (Notable)
Merida	Venezuela	Record high maximum temperature	34.2 C (93.6 F)	41 of 100 (Notable)
Cuetzalan del Progreso	Mexico	Record low maximum temperature	15.0 C (59.0 F)	40 of 100 (Notable)
Playa Vicente	Mexico	Record low minimum temperature	12.8 C (55.0 F)	40 of 100 (Notable)
Gyzylarbat	Turkmenistan	Record low maximum temperature	14.9 C (58.8 F)	40 of 100 (Notable)
Dickson	United States	Record daily precipitation	38.1 mm (1.5 in)	39 of 100 (Notable)
Presa El Giron	Mexico	Record daily precipitation	33.3 mm (1.3 in)	38 of 100 (Notable)
Cuetzalan del Progreso	Mexico	Record low minimum temperature	10.0 C (50.0 F)	37 of 100 (Notable)
Syktyvkar	Russia	Record low minimum temperature	-14.7 C (5.5 F)	37 of 100 (Notable)
Stanley	United States	Record daily snowfall	5.1 cm (2.0 in)	37 of 100 (Notable)
Clear Lake	United States	Record daily precipitation	33.5 mm (1.3 in)	37 of 100 (Notable)
Raymond 3 NE	United States	Record daily precipitation	34.8 mm (1.4 in)	37 of 100 (Notable)
Cuapiaxtla	Mexico	Record daily precipitation	29.0 mm (1.1 in)	36 of 100 (Notable)
Morris W Cntrl Rsch & Outreach	United States	Record daily precipitation	25.1 mm (1.0 in)	36 of 100 (Notable)
San Mateo Acuitlapilco	Mexico	Record daily precipitation	38.4 mm (1.5 in)	35 of 100 (Notable)
Lowman	United States	Record low maximum temperature	2.2 C (36.0 F)	35 of 100 (Notable)
Osceola	United States	Record daily precipitation	46.7 mm (1.8 in)	35 of 100 (Notable)
Tulsa Intl AP	United States	Record daily precipitation	64.0 mm (2.5 in)	35 of 100 (Notable)
Klamath	United States	Record daily precipitation	68.6 mm (2.7 in)	34 of 100 (Routine)
Peru	United States	Record daily precipitation	35.1 mm (1.4 in)	34 of 100 (Routine)
Pogranichnoe	Russia	Record daily precipitation	57.5 mm (2.3 in)	33 of 100 (Routine)
Adrian 2 NNE	United States	Record daily precipitation	32.3 mm (1.3 in)	33 of 100 (Routine)
Wilmot	United States	Record daily precipitation	32.3 mm (1.3 in)	33 of 100 (Routine)
Gull Lake Dam	United States	Record daily precipitation	30.7 mm (1.2 in)	32 of 100 (Routine)
Upland 2NE	United States	Record daily precipitation	76.2 mm (3.0 in)	32 of 100 (Routine)
Elkton 3 SW	United States	Record daily precipitation	35.3 mm (1.4 in)	32 of 100 (Routine)
Brookings 2 NE	United States	Record daily precipitation	30.5 mm (1.2 in)	32 of 100 (Routine)
Dalian	China	Record high maximum temperature	28.5 C (83.3 F)	31 of 100 (Routine)
Wudu	China	Record high maximum temperature	34.9 C (94.8 F)	31 of 100 (Routine)
Ocampo	Mexico	Record low minimum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Happy Camp Rs	United States	Record daily precipitation	29.2 mm (1.1 in)	31 of 100 (Routine)
Canby	United States	Record daily precipitation	36.6 mm (1.4 in)	31 of 100 (Routine)
Falls City 2 SSW	United States	Record daily precipitation	30.0 mm (1.2 in)	31 of 100 (Routine)
Hitoyoshi	Japan	Record high maximum temperature	30.4 C (86.7 F)	30 of 100 (Routine)
Perry	United States	Record daily precipitation	89.4 mm (3.5 in)	30 of 100 (Routine)
Clark	United States	Record daily precipitation	33.5 mm (1.3 in)	30 of 100 (Routine)
Lebanon 7 N	United States	Record daily precipitation	40.9 mm (1.6 in)	30 of 100 (Routine)
Brodhead Wwtp	United States	Record daily precipitation	50.8 mm (2.0 in)	30 of 100 (Routine)
Guanghua	China	Record high maximum temperature	35.0 C (95.0 F)	29 of 100 (Routine)
Miyakonojo	Japan	Record high maximum temperature	30.4 C (86.7 F)	29 of 100 (Routine)
Suchixtlahuaca -Quiotep-	Mexico	Record low minimum temperature	2.8 C (37.0 F)	29 of 100 (Routine)
Misantla	Mexico	Record low minimum temperature	14.4 C (57.9 F)	29 of 100 (Routine)
Gilman	United States	Record daily precipitation	34.3 mm (1.4 in)	29 of 100 (Routine)
Mtn View	United States	Record daily snowfall	8.9 cm (3.5 in)	29 of 100 (Routine)
Tsu	Japan	Record high maximum temperature	27.4 C (81.3 F)	28 of 100 (Routine)
Brainerd	United States	Record daily precipitation	27.4 mm (1.1 in)	28 of 100 (Routine)
Wessington 2SE	United States	Record daily precipitation	25.4 mm (1.0 in)	28 of 100 (Routine)
Despoblado	Mexico	Record low minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
San Francisco Telixtlahuaca	Mexico	Record low maximum temperature	21.7 C (71.1 F)	27 of 100 (Routine)
Juncos 1 SE	Puerto Rico [United States]	Record low maximum temperature	27.2 C (81.0 F)	27 of 100 (Routine)
Liberty 1 NE	United States	Record high maximum temperature	28.3 C (82.9 F)	27 of 100 (Routine)

Counts by Type and Timescale

586 records

Records set or tied on 21 April 2004 by type: Highest daily maximum 168, Lowest daily maximum 39, Highest daily minimum 126, Lowest daily minimum 77, Heaviest daily rainfall 166, Heaviest daily snowfall 7, Deepest snow cover 3.

Records on 21 April 2004 by type
Record type	Records
Highest daily maximum	168
Lowest daily maximum	39
Highest daily minimum	126
Lowest daily minimum	77
Heaviest daily rainfall	166
Heaviest daily snowfall	7
Deepest snow cover	3

Records on 21 April 2004 by timescale: all-time 0, monthly 24, daily 562.

How Much Records Were Beaten By

468 broken records

Margins by which the 468 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 88.9. Ties are not counted.

Top 20 by Significance

21 April 2004

Top 20 records on 21 April 2004 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 2004	Napoopoo 28, US	monthly rain	86.9 mm (3.4 in)	22.9 mm (0.9 in)	79 years	69 of 100 (Major)
21 April 2004	Antalya, TR	monthly rain	188.0 mm (7.4 in)	88.9 mm (3.5 in)	13 years	57 of 100 (Notable)
21 April 2004	Kealakekua 26.2, US	daily rain	33.8 mm (1.3 in)	12.0 mm (0.5 in)	97 years	50 of 100 (Notable)
21 April 2004	Ulupalakua Rch 250, US	monthly rain	130.0 mm (5.1 in)	36.8 mm (1.4 in)	26 years	47 of 100 (Notable)
21 April 2004	Gasquet Rs, US	daily rain	74.9 mm (2.9 in)	44.2 mm (1.7 in)	43 years	46 of 100 (Notable)
21 April 2004	Laketown, US	daily snowfall	15.2 cm (6.0 in)	2.5 cm (1.0 in)	100 years	45 of 100 (Notable)
21 April 2004	W Lawai 931, US	daily rain	43.2 mm (1.7 in)	33.0 mm (1.3 in)	33 years	43 of 100 (Notable)
21 April 2004	Nogliki, RU	daily rain	25.8 mm (1.0 in)	12.5 mm (0.5 in)	26 years	41 of 100 (Notable)
21 April 2004	Keo, US	daily rain	90.2 mm (3.6 in)	50.6 mm (2.0 in)	30 years	41 of 100 (Notable)
21 April 2004	Kirksville, US	daily rain	53.3 mm (2.1 in)	12.7 mm (0.5 in)	72 years	41 of 100 (Notable)
21 April 2004	Merida, VE	daily high max	34.2 C (93.6 F)	6.1 C (11.0 F)	17 years	41 of 100 (Notable)
21 April 2004	Cuetzalan del Progreso, MX	daily low max	15.0 C (59.0 F)	5.6 C (10.1 F)	70 years	40 of 100 (Notable)
21 April 2004	Playa Vicente, MX	daily low min	12.8 C (55.0 F)	5.0 C (9.0 F)	42 years	40 of 100 (Notable)
21 April 2004	Gyzylarbat, TM	daily low max	14.9 C (58.8 F)	0.1 C (0.2 F)	105 years	40 of 100 (Notable)
21 April 2004	Dickson, US	daily rain	38.1 mm (1.5 in)	11.9 mm (0.5 in)	73 years	39 of 100 (Notable)
21 April 2004	Presa El Giron, MX	daily rain	33.3 mm (1.3 in)	18.3 mm (0.7 in)	10 years	38 of 100 (Notable)
21 April 2004	Cuetzalan del Progreso, MX	daily low min	10.0 C (50.0 F)	3.9 C (7.0 F)	66 years	37 of 100 (Notable)
21 April 2004	Syktyvkar, RU	daily low min	-14.7 C (5.5 F)	0.5 C (0.9 F)	92 years	37 of 100 (Notable)
21 April 2004	Stanley, US	daily snowfall	5.1 cm (2.0 in)	2.6 cm (1.0 in)	81 years	37 of 100 (Notable)
21 April 2004	Clear Lake, US	daily rain	33.5 mm (1.3 in)	16.5 mm (0.6 in)	32 years	37 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 2004

Records set or tied on this calendar date in each year from 1793 to 2004. 2004 had 586 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 2004-04-21: 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 20	447
20 to 40	15
40 to 60	3
60 to 80	2
80 to 100	1