Weather Records on 21 September 2004

888 weather records were set or tied worldwide on 21 September 2004. Highest significance: Mtn Dell Dam, US.

Key Facts for 21 September 2004

On 21 September 2004, 888 weather records were set or tied at long-record stations worldwide.
346 were record highs and 240 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 25 monthly and 860 daily.
Mtn Dell Dam set an all-time record daily precipitation of 127.3 mm (5.0 in) on 21 September 2004.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 448 records.

Record Map

888 stations

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

Weather records on 21 September 2004: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mtn Dell Dam	United States	Record daily precipitation	127.3 mm (5.0 in)	91 of 100 (Exceptional)
Kr. Cuxhaven Steinau	Germany	Record daily precipitation	59.2 mm (2.3 in)	71 of 100 (Major)
Gluckstadt	Germany	Record daily precipitation	63.4 mm (2.5 in)	68 of 100 (Major)
Gregory	United States	Record daily precipitation	71.9 mm (2.8 in)	65 of 100 (Major)
Truckee Rs	United States	Record daily snowfall	10.2 cm (4.0 in)	57 of 100 (Notable)
Stratford	United States	Record daily precipitation	85.6 mm (3.4 in)	57 of 100 (Notable)
Skagway	United States	Record daily precipitation	35.1 mm (1.4 in)	57 of 100 (Notable)
Tarpon Spgs Sewage Plt	United States	Record low maximum temperature	22.8 C (73.0 F)	55 of 100 (Notable)
Angoon Pwr	United States	Record daily precipitation	55.9 mm (2.2 in)	55 of 100 (Notable)
Trondheim - Voll	Norway	Record daily precipitation	58.7 mm (2.3 in)	54 of 100 (Notable)
Agua Tibia	Mexico	Record daily precipitation	66.8 mm (2.6 in)	52 of 100 (Notable)
Stuart	United States	Record daily precipitation	133.6 mm (5.3 in)	52 of 100 (Notable)
Loksmyr	Norway	Record daily precipitation	65.1 mm (2.6 in)	51 of 100 (Notable)
Prachuap Khiri Khan	Thailand	Record daily precipitation	62.0 mm (2.4 in)	51 of 100 (Notable)
Ft Pierce	United States	Record daily precipitation	119.4 mm (4.7 in)	51 of 100 (Notable)
Grambek	Germany	Record daily precipitation	43.2 mm (1.7 in)	49 of 100 (Notable)
Kiuruvesi Korpijoki	Finland	Record daily precipitation	28.3 mm (1.1 in)	48 of 100 (Notable)
Leinstrand	Norway	Record daily precipitation	66.0 mm (2.6 in)	48 of 100 (Notable)
Middleburg	United States	Record low maximum temperature	21.1 C (70.0 F)	48 of 100 (Notable)
Vaala Pelso	Finland	Record daily precipitation	28.6 mm (1.1 in)	47 of 100 (Notable)
Dawson	United States	Record daily precipitation	34.5 mm (1.4 in)	47 of 100 (Notable)
Monticello 2E	United States	Record low maximum temperature	8.9 C (48.0 F)	47 of 100 (Notable)
Hamburg Fuhlsbuettel	Germany	Record daily precipitation	38.6 mm (1.5 in)	44 of 100 (Notable)
Lake City 2 E	United States	Record low maximum temperature	22.8 C (73.0 F)	44 of 100 (Notable)
Pulkkila Kk	Finland	Record daily precipitation	28.2 mm (1.1 in)	43 of 100 (Notable)
Hamburg-Kirchwerder	Germany	Record daily precipitation	27.8 mm (1.1 in)	43 of 100 (Notable)
Hamburg-Wandsbek	Germany	Record daily precipitation	33.0 mm (1.3 in)	43 of 100 (Notable)
Boizenburg	Germany	Record daily precipitation	29.3 mm (1.2 in)	43 of 100 (Notable)
Lien I Selbu	Norway	Record daily precipitation	49.5 mm (1.9 in)	43 of 100 (Notable)
Cuxhaven	Germany	Record daily precipitation	39.6 mm (1.6 in)	42 of 100 (Notable)
Orrbyn	Sweden	Record daily precipitation	30.8 mm (1.2 in)	42 of 100 (Notable)
New Ulm 2 SE	United States	Record daily precipitation	49.3 mm (1.9 in)	42 of 100 (Notable)
Willmar Wwtp	United States	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Eureka	United States	Record low maximum temperature	6.7 C (44.1 F)	42 of 100 (Notable)
Orland	Norway	Record daily precipitation	62.5 mm (2.5 in)	41 of 100 (Notable)
Haltdalen III	Norway	Record daily precipitation	30.0 mm (1.2 in)	41 of 100 (Notable)
Upper Lake 2 N	United States	Record low minimum temperature	2.2 C (36.0 F)	41 of 100 (Notable)
Spencer 1 N	United States	Record daily precipitation	59.4 mm (2.3 in)	41 of 100 (Notable)
Hugoton	United States	Record daily precipitation	36.8 mm (1.4 in)	41 of 100 (Notable)
Greeneville Exp STN	United States	Record low minimum temperature	3.3 C (37.9 F)	41 of 100 (Notable)
Outokumpu Sysmankyla Suvisrant	Finland	Record daily precipitation	28.4 mm (1.1 in)	40 of 100 (Notable)
Pelzerhaken	Germany	Record daily precipitation	31.5 mm (1.2 in)	40 of 100 (Notable)
Brookings 2 NE	United States	Record daily precipitation	45.0 mm (1.8 in)	40 of 100 (Notable)
Clear Lake	United States	Record daily precipitation	50.8 mm (2.0 in)	40 of 100 (Notable)
Ahuacatlan	Mexico	Record daily precipitation	82.3 mm (3.2 in)	39 of 100 (Notable)
Huejucar (Obs)	Mexico	Record daily precipitation	40.9 mm (1.6 in)	38 of 100 (Notable)
Skjenaldfossen I Orkdal	Norway	Record daily precipitation	42.3 mm (1.7 in)	38 of 100 (Notable)
Podor	Senegal	Record daily precipitation	33.0 mm (1.3 in)	37 of 100 (Notable)
Gull Lake Dam	United States	Record high minimum temperature	14.4 C (57.9 F)	37 of 100 (Notable)
Provo Byu	United States	Record low maximum temperature	14.4 C (57.9 F)	37 of 100 (Notable)
Truckee Rs	United States	Record snow depth	10.2 cm (4.0 in)	36 of 100 (Notable)
Flagler 1S	United States	Record high maximum temperature	34.4 C (93.9 F)	36 of 100 (Notable)
Mount Gambier Post Office	Australia	Record high maximum temperature	26.0 C (78.8 F)	35 of 100 (Notable)
Mersa Matruh	Egypt	Record low minimum temperature	16.0 C (60.8 F)	35 of 100 (Notable)
N Fk Rs	United States	Record low minimum temperature	0.6 C (33.1 F)	35 of 100 (Notable)
Centennial 1NE	United States	Record daily snowfall	20.3 cm (8.0 in)	35 of 100 (Notable)
Yoder 5 W	United States	Record daily precipitation	30.0 mm (1.2 in)	35 of 100 (Notable)
Yurecuaro	Mexico	Record daily precipitation	49.8 mm (2.0 in)	34 of 100 (Routine)
Yosemite Park HQ	United States	Record low maximum temperature	15.0 C (59.0 F)	34 of 100 (Routine)
Walden	United States	Record snow depth	15.2 cm (6.0 in)	34 of 100 (Routine)

Counts by Type and Timescale

888 records

Records set or tied on 21 September 2004 by type: Highest daily maximum 197, Lowest daily maximum 145, Highest daily minimum 149, Lowest daily minimum 95, Heaviest daily rainfall 286, Heaviest daily snowfall 9, Deepest snow cover 7.

Records on 21 September 2004 by type
Record type	Records
Highest daily maximum	197
Lowest daily maximum	145
Highest daily minimum	149
Lowest daily minimum	95
Heaviest daily rainfall	286
Heaviest daily snowfall	9
Deepest snow cover	7

Records on 21 September 2004 by timescale: all-time 3, monthly 25, daily 860.

How Much Records Were Beaten By

693 broken records

Margins by which the 693 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

21 September 2004

Top 20 records on 21 September 2004 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2004	Mtn Dell Dam, US	all-time rain	127.3 mm (5.0 in)	65.8 mm (2.6 in)	77 years	91 of 100 (Exceptional)
21 September 2004	Kr. Cuxhaven Steinau, DE	monthly rain	59.2 mm (2.3 in)	18.7 mm (0.7 in)	72 years	71 of 100 (Major)
21 September 2004	Gluckstadt, DE	monthly rain	63.4 mm (2.5 in)	25.2 mm (1.0 in)	38 years	68 of 100 (Major)
21 September 2004	Gregory, US	daily rain	71.9 mm (2.8 in)	39.9 mm (1.6 in)	80 years	65 of 100 (Major)
21 September 2004	Truckee Rs, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	92 years	57 of 100 (Notable)
21 September 2004	Stratford, US	daily rain	85.6 mm (3.4 in)	68.3 mm (2.7 in)	29 years	57 of 100 (Notable)
21 September 2004	Skagway, US	daily rain	35.1 mm (1.4 in)	19.4 mm (0.8 in)	85 years	57 of 100 (Notable)
21 September 2004	Tarpon Spgs Sewage Plt, US	monthly low max	22.8 C (73.0 F)	1.1 C (2.0 F)	109 years	55 of 100 (Notable)
21 September 2004	Angoon Pwr, US	daily rain	55.9 mm (2.2 in)	34.3 mm (1.4 in)	50 years	55 of 100 (Notable)
21 September 2004	Trondheim - Voll, NO	monthly rain	58.7 mm (2.3 in)	10.3 mm (0.4 in)	62 years	54 of 100 (Notable)
21 September 2004	Agua Tibia, MX	daily rain	66.8 mm (2.6 in)	39.1 mm (1.5 in)	50 years	52 of 100 (Notable)
21 September 2004	Stuart, US	daily rain	133.6 mm (5.3 in)	82.8 mm (3.3 in)	19 years	52 of 100 (Notable)
21 September 2004	Loksmyr, NO	daily rain	65.1 mm (2.6 in)	48.4 mm (1.9 in)	26 years	51 of 100 (Notable)
21 September 2004	Prachuap Khiri Khan, TH	daily rain	62.0 mm (2.4 in)	38.5 mm (1.5 in)	33 years	51 of 100 (Notable)
21 September 2004	Ft Pierce, US	daily rain	119.4 mm (4.7 in)	64.3 mm (2.5 in)	27 years	51 of 100 (Notable)
21 September 2004	Grambek, DE	daily rain	43.2 mm (1.7 in)	28.0 mm (1.1 in)	14 years	49 of 100 (Notable)
21 September 2004	Kiuruvesi Korpijoki, FI	daily rain	28.3 mm (1.1 in)	17.8 mm (0.7 in)	29 years	48 of 100 (Notable)
21 September 2004	Leinstrand, NO	all-time rain	66.0 mm (2.6 in)	13.0 mm (0.5 in)	4 years	48 of 100 (Notable)
21 September 2004	Middleburg, US	monthly low max	21.1 C (70.0 F)	0.6 C (1.1 F)	87 years	48 of 100 (Notable)
21 September 2004	Vaala Pelso, FI	daily rain	28.6 mm (1.1 in)	15.7 mm (0.6 in)	29 years	47 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

1805 to 2004

Records set or tied on this calendar date in each year from 1805 to 2004. 2004 had 888 records.

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

Records on 09-21 in each year
Year	Records
1805	1
1812	1
1825	2
1840	1
1841	1
1842	1
1848	1
1854	1
1856	2
1868	1
1872	2
1873	1
1877	1
1878	1
1881	1
1882	1
1884	1
1886	1
1888	2
1889	1
1891	10
1892	1
1893	10
1894	2
1895	3
1896	2
1897	6
1898	6
1899	3
1900	2
1901	5
1902	5
1903	8
1904	20
1905	12
1906	17
1907	10
1908	17
1909	10
1910	8
1911	18
1912	26
1913	37
1914	29
1915	34
1916	48
1917	28
1918	43
1919	54
1920	29
1921	64
1922	35
1923	232
1924	291
1925	278
1926	178
1927	165
1928	81
1929	232
1930	82
1931	681
1932	242
1933	193
1934	492
1935	199
1936	329
1937	487
1938	508
1939	308
1940	908
1941	416
1942	291
1943	407
1944	413
1945	507
1946	176
1947	534
1948	301
1949	298
1950	334
1951	241
1952	430
1953	382
1954	453
1955	752
1956	1,100
1957	366
1958	588
1959	513
1960	418
1961	441
1962	1,085
1963	306
1964	374
1965	1,088
1966	565
1967	577
1968	790
1969	593
1970	708
1971	645
1972	599
1973	421
1974	652
1975	528
1976	694
1977	918
1978	818
1979	736
1980	990
1981	696
1982	1,484
1983	2,207
1984	707
1985	796
1986	671
1987	965
1988	557
1989	1,002
1990	716
1991	1,021
1992	752
1993	911
1994	713
1995	2,002
1996	1,233
1997	1,112
1998	1,481
1999	1,025
2000	884
2001	718
2002	696
2003	959
2004	888
2005	1,143
2006	920
2007	742
2008	740
2009	715
2010	1,290
2011	542
2012	595
2013	769
2014	716
2015	565
2016	989
2017	1,178
2018	1,051
2019	833
2020	580
2021	465
2022	1,049
2023	783
2024	470
2025	588
2026	469

Download the Data

Data for records on 2004-09-21: 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 20	655
20 to 40	25
40 to 60	2
60 to 80	5
80 to 100	1
100 to 120	4
120 to 140	1