Weather Records on 21 September 2009

715 weather records were set or tied worldwide on 21 September 2009. Highest significance: Seymour 1 WSW, US.

Key Facts for 21 September 2009

On 21 September 2009, 715 weather records were set or tied at long-record stations worldwide.
423 were record highs and 110 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 30 monthly and 682 daily.
Seymour 1 WSW set a daily record precipitation of 74.2 mm (2.9 in) on 21 September 2009.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 449 records.

Record Map

715 stations

715 station records on 21 September 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Seymour 1 WSW	United States	Record daily precipitation	74.2 mm (2.9 in)	76 of 100 (Major)
Walhalla	United States	Record daily precipitation	212.9 mm (8.4 in)	76 of 100 (Major)
Toccoa	United States	Record daily precipitation	301.5 mm (11.9 in)	74 of 100 (Major)
Mt Carmel	United States	Record daily precipitation	97.0 mm (3.8 in)	73 of 100 (Major)
Jacksonville 2E	United States	Record daily precipitation	101.6 mm (4.0 in)	62 of 100 (Major)
White Hall 1 E	United States	Record daily precipitation	92.7 mm (3.6 in)	62 of 100 (Major)
Concordia ASOS	United States	Record daily precipitation	58.4 mm (2.3 in)	62 of 100 (Major)
Louisville McAlpine	United States	Record daily precipitation	144.8 mm (5.7 in)	61 of 100 (Major)
Carrollton	United States	Record daily precipitation	194.6 mm (7.7 in)	60 of 100 (Major)
Groznyj	Russia	Record daily precipitation	42.9 mm (1.7 in)	58 of 100 (Notable)
Cornelia	United States	Record daily precipitation	113.5 mm (4.5 in)	58 of 100 (Notable)
Mahackala	Russia	Record daily precipitation	61.6 mm (2.4 in)	55 of 100 (Notable)
Alpharetta 4 SSW	United States	Record daily precipitation	72.9 mm (2.9 in)	55 of 100 (Notable)
Valley Head	United States	Record daily precipitation	183.1 mm (7.2 in)	54 of 100 (Notable)
Embry	United States	Record daily precipitation	96.5 mm (3.8 in)	54 of 100 (Notable)
Canton	United States	Record daily precipitation	100.3 mm (3.9 in)	53 of 100 (Notable)
W Pt	United States	Record daily precipitation	110.0 mm (4.3 in)	51 of 100 (Notable)
Mount Gambier Post Office	Australia	Record daily precipitation	31.2 mm (1.2 in)	50 of 100 (Notable)
Trinidad	United States	Record daily snowfall	5.1 cm (2.0 in)	50 of 100 (Notable)
Greenfield	United States	Record daily precipitation	74.7 mm (2.9 in)	48 of 100 (Notable)
Shepherdsville 5NE	United States	Record daily precipitation	81.3 mm (3.2 in)	47 of 100 (Notable)
Bandon 2 NNE	United States	Record high maximum temperature	33.9 C (93.0 F)	47 of 100 (Notable)
Macon Middle Ga Rgnl AP	United States	Record daily precipitation	131.6 mm (5.2 in)	46 of 100 (Notable)
Paso de Arocha	Mexico	Record low minimum temperature	17.8 C (64.0 F)	45 of 100 (Notable)
Coweeta Exp STN	United States	Record daily precipitation	93.2 mm (3.7 in)	45 of 100 (Notable)
Willow City	United States	Record high minimum temperature	12.2 C (54.0 F)	44 of 100 (Notable)
Morgan	United States	Record daily precipitation	30.5 mm (1.2 in)	44 of 100 (Notable)
Centreville 6 SW	United States	Record daily precipitation	102.9 mm (4.1 in)	44 of 100 (Notable)
Boulia Airport	Australia	Record high minimum temperature	24.9 C (76.8 F)	43 of 100 (Notable)
Blairsville Exp STN	United States	Record daily precipitation	63.0 mm (2.5 in)	42 of 100 (Notable)
Saint Meinrad	United States	Record daily precipitation	75.2 mm (3.0 in)	42 of 100 (Notable)
Lake Toxaway 2 SW	United States	Record daily precipitation	180.6 mm (7.1 in)	42 of 100 (Notable)
Rockwood 2	United States	Record daily precipitation	83.3 mm (3.3 in)	42 of 100 (Notable)
Verhojansk	Russia	Record high minimum temperature	3.6 C (38.5 F)	41 of 100 (Notable)
Bay Minette	United States	Record high minimum temperature	28.3 C (82.9 F)	40 of 100 (Notable)
Yosemite Park HQ	United States	Record high minimum temperature	18.3 C (64.9 F)	40 of 100 (Notable)
Girard	United States	Record daily precipitation	83.8 mm (3.3 in)	40 of 100 (Notable)
Mount Barker	Australia	Record low maximum temperature	9.0 C (48.2 F)	39 of 100 (Notable)
Medora 3 SW	United States	Record daily precipitation	68.3 mm (2.7 in)	39 of 100 (Notable)
Williamsburg	United States	Record daily precipitation	100.1 mm (3.9 in)	39 of 100 (Notable)
Brevard	United States	Record daily precipitation	87.6 mm (3.4 in)	39 of 100 (Notable)
Tulsa Intl AP	United States	Record daily precipitation	112.3 mm (4.4 in)	39 of 100 (Notable)
Cuautitlan	Mexico	Record daily precipitation	108.5 mm (4.3 in)	38 of 100 (Notable)
Kurgan-Tyube	Tajikistan	Record high minimum temperature	20.1 C (68.2 F)	38 of 100 (Notable)
Bridgeport 5 NW	United States	Record daily precipitation	97.8 mm (3.9 in)	38 of 100 (Notable)
Taylorsville	United States	Record daily precipitation	52.1 mm (2.1 in)	38 of 100 (Notable)
Athens Ben Epps AP	United States	Record daily precipitation	79.2 mm (3.1 in)	38 of 100 (Notable)
Big Creek Ph 1	United States	Record high minimum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Dallas 7 NE	United States	Record daily precipitation	138.2 mm (5.4 in)	37 of 100 (Notable)
Farmers Retreat	United States	Record daily precipitation	51.3 mm (2.0 in)	37 of 100 (Notable)
Asheville	United States	Record daily precipitation	64.0 mm (2.5 in)	37 of 100 (Notable)
Port Broughton (Wandearah)	Australia	Record daily precipitation	26.0 mm (1.0 in)	36 of 100 (Notable)
Zaragoza (Smn)	Mexico	Record high maximum temperature	38.9 C (102.0 F)	36 of 100 (Notable)
Hatyrka	Russia	Record high maximum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Muskogee	United States	Record daily precipitation	57.2 mm (2.3 in)	36 of 100 (Notable)
Ottumwa Ind AP	United States	Record daily precipitation	62.7 mm (2.5 in)	36 of 100 (Notable)
Canovanas	Puerto Rico [United States]	Record daily precipitation	61.0 mm (2.4 in)	35 of 100 (Notable)
Budennovsk	Russia	Record daily precipitation	42.5 mm (1.7 in)	35 of 100 (Notable)
Wauchula	United States	Record high minimum temperature	25.0 C (77.0 F)	35 of 100 (Notable)
Jewell	United States	Record daily precipitation	49.3 mm (1.9 in)	35 of 100 (Notable)

Counts by Type and Timescale

715 records

Records set or tied on 21 September 2009 by type: Highest daily maximum 198, Lowest daily maximum 56, Highest daily minimum 225, Lowest daily minimum 54, Heaviest daily rainfall 180, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 21 September 2009 by type
Record type	Records
Highest daily maximum	198
Lowest daily maximum	56
Highest daily minimum	225
Lowest daily minimum	54
Heaviest daily rainfall	180
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 21 September 2009 by timescale: all-time 3, monthly 30, daily 682.

How Much Records Were Beaten By

513 broken records

Margins by which the 513 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 172.3. Ties are not counted.

Top 20 by Significance

21 September 2009

Top 20 records on 21 September 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2009	Seymour 1 WSW, US	daily rain	74.2 mm (2.9 in)	55.1 mm (2.2 in)	88 years	76 of 100 (Major)
21 September 2009	Walhalla, US	daily rain	212.9 mm (8.4 in)	172.3 mm (6.8 in)	88 years	76 of 100 (Major)
21 September 2009	Toccoa, US	all-time rain	301.5 mm (11.9 in)	83.1 mm (3.3 in)	15 years	74 of 100 (Major)
21 September 2009	Mt Carmel, US	daily rain	97.0 mm (3.8 in)	67.8 mm (2.7 in)	76 years	73 of 100 (Major)
21 September 2009	Jacksonville 2E, US	daily rain	101.6 mm (4.0 in)	38.9 mm (1.5 in)	90 years	62 of 100 (Major)
21 September 2009	White Hall 1 E, US	daily rain	92.7 mm (3.6 in)	48.8 mm (1.9 in)	62 years	62 of 100 (Major)
21 September 2009	Concordia ASOS, US	daily rain	58.4 mm (2.3 in)	30.7 mm (1.2 in)	107 years	62 of 100 (Major)
21 September 2009	Louisville McAlpine, US	daily rain	144.8 mm (5.7 in)	98.3 mm (3.9 in)	51 years	61 of 100 (Major)
21 September 2009	Carrollton, US	all-time rain	194.6 mm (7.7 in)	36.4 mm (1.4 in)	28 years	60 of 100 (Major)
21 September 2009	Groznyj, RU	daily rain	42.9 mm (1.7 in)	29.8 mm (1.2 in)	46 years	58 of 100 (Notable)
21 September 2009	Cornelia, US	daily rain	113.5 mm (4.5 in)	53.3 mm (2.1 in)	76 years	58 of 100 (Notable)
21 September 2009	Mahackala, RU	daily rain	61.6 mm (2.4 in)	16.9 mm (0.7 in)	112 years	55 of 100 (Notable)
21 September 2009	Alpharetta 4 SSW, US	daily rain	72.9 mm (2.9 in)	44.7 mm (1.8 in)	51 years	55 of 100 (Notable)
21 September 2009	Valley Head, US	daily rain	183.1 mm (7.2 in)	122.4 mm (4.8 in)	14 years	54 of 100 (Notable)
21 September 2009	Embry, US	daily rain	96.5 mm (3.8 in)	71.1 mm (2.8 in)	26 years	54 of 100 (Notable)
21 September 2009	Canton, US	daily rain	100.3 mm (3.9 in)	34.0 mm (1.3 in)	76 years	53 of 100 (Notable)
21 September 2009	W Pt, US	daily rain	110.0 mm (4.3 in)	60.2 mm (2.4 in)	16 years	51 of 100 (Notable)
21 September 2009	Mount Gambier Post Office, AU	daily rain	31.2 mm (1.2 in)	5.3 mm (0.21 in)	140 years	50 of 100 (Notable)
21 September 2009	Trinidad, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	103 years	50 of 100 (Notable)
21 September 2009	Greenfield, US	daily rain	74.7 mm (2.9 in)	64.5 mm (2.5 in)	8 years	48 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 2009

Records set or tied on this calendar date in each year from 1805 to 2009. 2009 had 715 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 2009-09-21: 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 2026-10-14 (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 25	464
25 to 50	28
50 to 75	15
75 to 100	2
100 to 125	3
125 to 150	0
150 to 175	1