Weather Records on 21 August 2004

1,585 weather records were set or tied worldwide on 21 August 2004. Highest significance: Sonora, US.

Key Facts for 21 August 2004

On 21 August 2004, 1,585 weather records were set or tied at long-record stations worldwide.
435 were record highs and 759 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 60 monthly and 1,522 daily.
Sonora set a daily record precipitation of 59.9 mm (2.4 in) on 21 August 2004.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 443 records.

Record Map

1,585 stations

1,585 station records on 21 August 2004 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 2004: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sonora	United States	Record daily precipitation	59.9 mm (2.4 in)	70 of 100 (Major)
Des Arc	United States	Record daily precipitation	80.0 mm (3.1 in)	61 of 100 (Major)
Newton	United States	Record daily precipitation	68.8 mm (2.7 in)	58 of 100 (Notable)
Mason	United States	Record daily precipitation	63.0 mm (2.5 in)	57 of 100 (Notable)
Anacortes	United States	Record daily precipitation	33.0 mm (1.3 in)	57 of 100 (Notable)
High Point Park	United States	Record daily precipitation	81.8 mm (3.2 in)	56 of 100 (Notable)
Danbury	United States	Record daily precipitation	101.6 mm (4.0 in)	55 of 100 (Notable)
Rusk	United States	Record daily precipitation	88.1 mm (3.5 in)	55 of 100 (Notable)
Severnoe	Russia	Record daily precipitation	33.0 mm (1.3 in)	54 of 100 (Notable)
Dzardzan	Russia	Record daily precipitation	33.2 mm (1.3 in)	53 of 100 (Notable)
Charles City	United States	Record low minimum temperature	3.3 C (37.9 F)	53 of 100 (Notable)
El Reno 1 N	United States	Record low maximum temperature	23.9 C (75.0 F)	53 of 100 (Notable)
Clarion 3 SW	United States	Record daily precipitation	51.8 mm (2.0 in)	53 of 100 (Notable)
Dialville 2 W	United States	Record daily precipitation	82.8 mm (3.3 in)	53 of 100 (Notable)
Menard	United States	Record daily precipitation	45.2 mm (1.8 in)	53 of 100 (Notable)
Dutch Harbor	United States	Record daily precipitation	56.4 mm (2.2 in)	53 of 100 (Notable)
Rovaniemi Lentoasema	Finland	Record daily precipitation	74.8 mm (2.9 in)	52 of 100 (Notable)
Caledonia	United States	Record low minimum temperature	3.9 C (39.0 F)	52 of 100 (Notable)
Healdton 3 E	United States	Record low maximum temperature	23.9 C (75.0 F)	52 of 100 (Notable)
Little Falls City Rsch	United States	Record daily precipitation	26.2 mm (1.0 in)	51 of 100 (Notable)
Pauls Valley 4 WSW	United States	Record low maximum temperature	24.4 C (75.9 F)	51 of 100 (Notable)
Bowie	United States	Record low maximum temperature	24.4 C (75.9 F)	51 of 100 (Notable)
Baruth	Germany	Record daily precipitation	67.9 mm (2.7 in)	50 of 100 (Notable)
Millport 4 NE	United States	Record daily precipitation	42.9 mm (1.7 in)	50 of 100 (Notable)
Yarra Creek	Australia	Record daily precipitation	66.4 mm (2.6 in)	49 of 100 (Notable)
Concepcion de la Norma	Mexico	Record daily precipitation	78.0 mm (3.1 in)	49 of 100 (Notable)
Stevenson Dam	United States	Record daily precipitation	73.7 mm (2.9 in)	49 of 100 (Notable)
Albert Lea 3SE	United States	Record low minimum temperature	4.4 C (39.9 F)	49 of 100 (Notable)
Brunswick NAS	United States	Record daily precipitation	85.1 mm (3.4 in)	49 of 100 (Notable)
Ft Scott	United States	Record low maximum temperature	20.6 C (69.1 F)	48 of 100 (Notable)
Carrollton	United States	Record low maximum temperature	20.0 C (68.0 F)	48 of 100 (Notable)
New Cumberland L/D	United States	Record daily precipitation	48.3 mm (1.9 in)	48 of 100 (Notable)
Marion 7 NE	United States	Record daily precipitation	86.1 mm (3.4 in)	47 of 100 (Notable)
Tuscola	United States	Record daily precipitation	31.0 mm (1.2 in)	47 of 100 (Notable)
Jefferson City Wtp	United States	Record low maximum temperature	18.3 C (64.9 F)	47 of 100 (Notable)
Cooperstown	United States	Record low minimum temperature	0.6 C (33.1 F)	47 of 100 (Notable)
Leola	United States	Record low minimum temperature	3.9 C (39.0 F)	47 of 100 (Notable)
Hesperia 4 WNW	United States	Record low minimum temperature	1.7 C (35.1 F)	46 of 100 (Notable)
Montevideo 1SW	United States	Record low minimum temperature	1.7 C (35.1 F)	46 of 100 (Notable)
Lockwood	United States	Record low maximum temperature	20.0 C (68.0 F)	46 of 100 (Notable)
Waverly	United States	Record daily precipitation	34.8 mm (1.4 in)	46 of 100 (Notable)
Eastland	United States	Record low maximum temperature	22.8 C (73.0 F)	46 of 100 (Notable)
Saint Johnsbury	United States	Record daily precipitation	32.0 mm (1.3 in)	46 of 100 (Notable)
Rochester	United States	Record high minimum temperature	22.2 C (72.0 F)	45 of 100 (Notable)
Montpelier	United States	Record low maximum temperature	16.7 C (62.1 F)	45 of 100 (Notable)
Weatherford	United States	Record low maximum temperature	23.9 C (75.0 F)	45 of 100 (Notable)
Redwood Falls Muni AP	United States	Record low minimum temperature	2.8 C (37.0 F)	45 of 100 (Notable)
Taganrog (Lighthouse)	Russia	Record daily precipitation	31.1 mm (1.2 in)	44 of 100 (Notable)
Lincoln	United States	Record low maximum temperature	19.4 C (66.9 F)	44 of 100 (Notable)
Iowa Falls	United States	Record low minimum temperature	5.6 C (42.1 F)	44 of 100 (Notable)
Yates Ctr	United States	Record low maximum temperature	22.2 C (72.0 F)	44 of 100 (Notable)
Grand Portage	United States	Record low minimum temperature	2.8 C (37.0 F)	44 of 100 (Notable)
Windom	United States	Record low minimum temperature	3.3 C (37.9 F)	44 of 100 (Notable)
Ithaca Cornell UNIV	United States	Record daily precipitation	41.1 mm (1.6 in)	44 of 100 (Notable)
Wauseon Wtp	United States	Record low minimum temperature	3.9 C (39.0 F)	44 of 100 (Notable)
Sonora	United States	Record low maximum temperature	27.8 C (82.0 F)	44 of 100 (Notable)
Cornwall	United States	Record daily precipitation	25.1 mm (1.0 in)	44 of 100 (Notable)
Lancaster 4 WSW	United States	Record low minimum temperature	6.1 C (43.0 F)	44 of 100 (Notable)
Gainesville Lock	United States	Record daily precipitation	50.8 mm (2.0 in)	43 of 100 (Notable)
Russellville	United States	Record daily precipitation	25.9 mm (1.0 in)	43 of 100 (Notable)

Counts by Type and Timescale

1,585 records

Records set or tied on 21 August 2004 by type: Highest daily maximum 154, Lowest daily maximum 329, Highest daily minimum 281, Lowest daily minimum 430, Heaviest daily rainfall 391.

Records on 21 August 2004 by type
Record type	Records
Highest daily maximum	154
Lowest daily maximum	329
Highest daily minimum	281
Lowest daily minimum	430
Heaviest daily rainfall	391
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 2004 by timescale: all-time 3, monthly 60, daily 1,522.

How Much Records Were Beaten By

1,189 broken records

Margins by which the 1,189 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 74.4. Ties are not counted.

Top 20 by Significance

21 August 2004

Top 20 records on 21 August 2004 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 2004	Sonora, US	daily rain	59.9 mm (2.4 in)	55.6 mm (2.2 in)	98 years	70 of 100 (Major)
21 August 2004	Des Arc, US	daily rain	80.0 mm (3.1 in)	63.0 mm (2.5 in)	44 years	61 of 100 (Major)
21 August 2004	Newton, US	daily rain	68.8 mm (2.7 in)	28.7 mm (1.1 in)	98 years	58 of 100 (Notable)
21 August 2004	Mason, US	daily rain	63.0 mm (2.5 in)	57.2 mm (2.3 in)	57 years	57 of 100 (Notable)
21 August 2004	Anacortes, US	daily rain	33.0 mm (1.3 in)	14.2 mm (0.6 in)	81 years	57 of 100 (Notable)
21 August 2004	High Point Park, US	daily rain	81.8 mm (3.2 in)	64.8 mm (2.6 in)	43 years	56 of 100 (Notable)
21 August 2004	Danbury, US	daily rain	101.6 mm (4.0 in)	62.7 mm (2.5 in)	43 years	55 of 100 (Notable)
21 August 2004	Rusk, US	daily rain	88.1 mm (3.5 in)	67.8 mm (2.7 in)	30 years	55 of 100 (Notable)
21 August 2004	Severnoe, RU	daily rain	33.0 mm (1.3 in)	23.0 mm (0.9 in)	46 years	54 of 100 (Notable)
21 August 2004	Dzardzan, RU	daily rain	33.2 mm (1.3 in)	15.9 mm (0.6 in)	66 years	53 of 100 (Notable)
21 August 2004	Charles City, US	daily low min	3.3 C (37.9 F)	5.0 C (9.0 F)	106 years	53 of 100 (Notable)
21 August 2004	El Reno 1 N, US	daily low max	23.9 C (75.0 F)	5.0 C (9.0 F)	110 years	53 of 100 (Notable)
21 August 2004	Clarion 3 SW, US	daily rain	51.8 mm (2.0 in)	16.7 mm (0.7 in)	98 years	53 of 100 (Notable)
21 August 2004	Dialville 2 W, US	daily rain	82.8 mm (3.3 in)	56.1 mm (2.2 in)	44 years	53 of 100 (Notable)
21 August 2004	Menard, US	daily rain	45.2 mm (1.8 in)	31.2 mm (1.2 in)	85 years	53 of 100 (Notable)
21 August 2004	Dutch Harbor, US	daily rain	56.4 mm (2.2 in)	25.4 mm (1.0 in)	22 years	53 of 100 (Notable)
21 August 2004	Rovaniemi Lentoasema, FI	daily rain	74.8 mm (2.9 in)	63.0 mm (2.5 in)	29 years	52 of 100 (Notable)
21 August 2004	Caledonia, US	daily low min	3.9 C (39.0 F)	4.4 C (7.9 F)	106 years	52 of 100 (Notable)
21 August 2004	Healdton 3 E, US	daily low max	23.9 C (75.0 F)	5.0 C (9.0 F)	98 years	52 of 100 (Notable)
21 August 2004	Little Falls City Rsch, US	daily rain	26.2 mm (1.0 in)	15.0 mm (0.6 in)	90 years	51 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

1800 to 2004

Records set or tied on this calendar date in each year from 1800 to 2004. 2004 had 1,585 records.

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

Records on 08-21 in each year
Year	Records
1800	1
1802	1
1804	1
1807	1
1816	1
1818	1
1832	1
1834	1
1839	3
1843	1
1847	1
1849	3
1850	1
1851	2
1863	1
1866	1
1867	2
1870	3
1871	2
1872	1
1873	1
1876	1
1877	2
1879	2
1884	2
1885	5
1886	1
1887	5
1888	2
1889	3
1890	4
1891	2
1893	4
1894	8
1895	3
1896	2
1897	4
1898	4
1899	7
1900	4
1901	9
1902	8
1903	6
1904	8
1905	4
1906	22
1907	20
1908	13
1909	17
1910	33
1911	19
1912	50
1913	37
1914	24
1915	21
1916	106
1917	101
1918	202
1919	19
1920	59
1921	34
1922	58
1923	111
1924	135
1925	220
1926	227
1927	228
1928	110
1929	234
1930	297
1931	277
1932	264
1933	328
1934	320
1935	318
1936	807
1937	762
1938	239
1939	630
1940	683
1941	180
1942	415
1943	438
1944	346
1945	544
1946	390
1947	954
1948	305
1949	508
1950	958
1951	699
1952	368
1953	331
1954	497
1955	885
1956	701
1957	490
1958	389
1959	704
1960	490
1961	644
1962	469
1963	338
1964	794
1965	455
1966	661
1967	541
1968	1,014
1969	650
1970	373
1971	660
1972	441
1973	438
1974	564
1975	545
1976	756
1977	764
1978	445
1979	778
1980	904
1981	1,015
1982	769
1983	1,407
1984	975
1985	623
1986	1,166
1987	740
1988	889
1989	828
1990	910
1991	828
1992	957
1993	698
1994	968
1995	962
1996	950
1997	1,291
1998	948
1999	717
2000	861
2001	797
2002	965
2003	1,241
2004	1,585
2005	1,071
2006	797
2007	1,829
2008	1,012
2009	1,319
2010	1,155
2011	1,022
2012	990
2013	513
2014	624
2015	651
2016	890
2017	347
2018	816
2019	631
2020	1,147
2021	767
2022	917
2023	1,826
2024	777
2025	1,230
2026	1,289

Download the Data

Data for records on 2004-08-21: 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	1,021
10 to 20	91
20 to 30	40
30 to 40	19
40 to 50	5
50 to 60	6
60 to 70	6
70 to 80	1