Weather Records on 21 September 2007

742 weather records were set or tied worldwide on 21 September 2007. Highest significance: Ladysmith 3W, US.

Key Facts for 21 September 2007

On 21 September 2007, 742 weather records were set or tied at long-record stations worldwide.
410 were record highs and 182 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 26 monthly and 716 daily.
Ladysmith 3W set a daily record precipitation of 66.0 mm (2.6 in) on 21 September 2007.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 449 records.

Record Map

742 stations

742 station records on 21 September 2007 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 2007: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ladysmith 3W	United States	Record daily precipitation	66.0 mm (2.6 in)	54 of 100 (Notable)
Hancock Houghton Co AP	United States	Record daily precipitation	53.1 mm (2.1 in)	51 of 100 (Notable)
Valencia	Spain	Record daily precipitation	96.7 mm (3.8 in)	50 of 100 (Notable)
Hayward Rs	United States	Record daily precipitation	40.6 mm (1.6 in)	50 of 100 (Notable)
Orderville	United States	Record daily precipitation	29.7 mm (1.2 in)	48 of 100 (Notable)
Benson	United States	Record daily precipitation	78.2 mm (3.1 in)	47 of 100 (Notable)
Hinckley	United States	Record daily precipitation	55.1 mm (2.2 in)	47 of 100 (Notable)
Almeria/Aeropuerto	Spain	Record daily precipitation	35.3 mm (1.4 in)	46 of 100 (Notable)
Lynch	United States	Record high minimum temperature	20.6 C (69.1 F)	45 of 100 (Notable)
Greeley	United States	Record high minimum temperature	18.3 C (64.9 F)	44 of 100 (Notable)
Calera	Mexico	Record high minimum temperature	20.6 C (69.1 F)	43 of 100 (Notable)
Melrose	United States	Record daily precipitation	70.9 mm (2.8 in)	43 of 100 (Notable)
Culbertson	United States	Record high minimum temperature	20.0 C (68.0 F)	43 of 100 (Notable)
Cuyamaca	United States	Record low maximum temperature	10.6 C (51.1 F)	42 of 100 (Notable)
Imperial	United States	Record low maximum temperature	21.1 C (70.0 F)	42 of 100 (Notable)
Woodland 1 WNW	United States	Record low maximum temperature	20.6 C (69.1 F)	42 of 100 (Notable)
Ridgeland 1NNE	United States	Record daily precipitation	65.0 mm (2.6 in)	42 of 100 (Notable)
Redlands	United States	Record low minimum temperature	7.8 C (46.0 F)	41 of 100 (Notable)
Shoshone	United States	Record daily precipitation	38.1 mm (1.5 in)	41 of 100 (Notable)
Bergland Dam	United States	Record daily precipitation	51.8 mm (2.0 in)	41 of 100 (Notable)
Curtis	United States	Record high minimum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Wray	United States	Record high maximum temperature	34.4 C (93.9 F)	40 of 100 (Notable)
Milan 1NW	United States	Record high minimum temperature	17.2 C (63.0 F)	40 of 100 (Notable)
Davis 2 WSW Exp Farm	United States	Record low maximum temperature	21.1 C (70.0 F)	39 of 100 (Notable)
Hetch Hetchy	United States	Record low maximum temperature	12.8 C (55.0 F)	39 of 100 (Notable)
Chambers	United States	Record high minimum temperature	19.4 C (66.9 F)	39 of 100 (Notable)
La Calentura	Mexico	Record daily precipitation	54.9 mm (2.2 in)	38 of 100 (Notable)
Ostrov Vrangelja	Russia	Record high minimum temperature	6.5 C (43.7 F)	38 of 100 (Notable)
Alicante	Spain	Record daily precipitation	90.4 mm (3.6 in)	38 of 100 (Notable)
Winona	United States	Record high minimum temperature	21.7 C (71.1 F)	38 of 100 (Notable)
Broken Bow 2 W	United States	Record high minimum temperature	19.4 C (66.9 F)	38 of 100 (Notable)
Tashkent	Uzbekistan	Record low maximum temperature	7.5 C (45.5 F)	38 of 100 (Notable)
Prachin Buri	Thailand	Record low minimum temperature	21.5 C (70.7 F)	36 of 100 (Notable)
Inverness 3 SE	United States	Record daily precipitation	54.1 mm (2.1 in)	36 of 100 (Notable)
Kitamiesashi	Japan	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
Benkelman 1N	United States	Record high minimum temperature	17.8 C (64.0 F)	35 of 100 (Notable)
Aranyaprathet	Thailand	Record low minimum temperature	21.1 C (70.0 F)	34 of 100 (Routine)
Herman	United States	Record daily precipitation	53.3 mm (2.1 in)	34 of 100 (Routine)
Tracy	United States	Record high minimum temperature	20.0 C (68.0 F)	34 of 100 (Routine)
Newport	United States	Record high minimum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Hialeah	United States	Record low minimum temperature	17.2 C (63.0 F)	33 of 100 (Routine)
Helen	United States	Record low minimum temperature	0.0 C (32.0 F)	33 of 100 (Routine)
Gothenburg	United States	Record high minimum temperature	18.9 C (66.0 F)	33 of 100 (Routine)
Oakdale	United States	Record high minimum temperature	19.4 C (66.9 F)	33 of 100 (Routine)
Davenport	United States	Record low minimum temperature	-3.3 C (26.1 F)	33 of 100 (Routine)
Dayton 1 WSW	United States	Record low minimum temperature	-3.3 C (26.1 F)	33 of 100 (Routine)
Aomori	Japan	Record high maximum temperature	32.4 C (90.3 F)	32 of 100 (Routine)
Calera	Mexico	Record high maximum temperature	33.9 C (93.0 F)	32 of 100 (Routine)
Chiconautla	Mexico	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
San Jose	Mexico	Record low minimum temperature	5.6 C (42.1 F)	32 of 100 (Routine)
Mecca Fire STN	United States	Record low maximum temperature	23.9 C (75.0 F)	32 of 100 (Routine)
Holyoke	United States	Record high maximum temperature	34.4 C (93.9 F)	32 of 100 (Routine)
Pana	United States	Record high maximum temperature	37.2 C (99.0 F)	32 of 100 (Routine)
Tyndall	United States	Record high minimum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Prentice #2	United States	Record daily precipitation	58.4 mm (2.3 in)	32 of 100 (Routine)
Bidyadanga	Australia	Record high maximum temperature	42.0 C (107.6 F)	31 of 100 (Routine)
Valencia/Aeropuerto	Spain	Record daily precipitation	65.2 mm (2.6 in)	31 of 100 (Routine)
Ravenna	United States	Record high minimum temperature	19.4 C (66.9 F)	31 of 100 (Routine)
Gordon	United States	Record daily precipitation	36.8 mm (1.4 in)	31 of 100 (Routine)
Lancang	China	Record low minimum temperature	12.6 C (54.7 F)	30 of 100 (Routine)

Counts by Type and Timescale

742 records

Records set or tied on 21 September 2007 by type: Highest daily maximum 241, Lowest daily maximum 77, Highest daily minimum 169, Lowest daily minimum 105, Heaviest daily rainfall 150.

Records on 21 September 2007 by type
Record type	Records
Highest daily maximum	241
Lowest daily maximum	77
Highest daily minimum	169
Lowest daily minimum	105
Heaviest daily rainfall	150
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 September 2007 by timescale: all-time 0, monthly 26, daily 716.

How Much Records Were Beaten By

585 broken records

Margins by which the 585 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 69.1. Ties are not counted.

Top 20 by Significance

21 September 2007

Top 20 records on 21 September 2007 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2007	Ladysmith 3W, US	daily rain	66.0 mm (2.6 in)	26.6 mm (1.0 in)	76 years	54 of 100 (Notable)
21 September 2007	Hancock Houghton Co AP, US	daily rain	53.1 mm (2.1 in)	40.1 mm (1.6 in)	16 years	51 of 100 (Notable)
21 September 2007	Valencia, ES	daily rain	96.7 mm (3.8 in)	69.1 mm (2.7 in)	12 years	50 of 100 (Notable)
21 September 2007	Hayward Rs, US	daily rain	40.6 mm (1.6 in)	12.7 mm (0.5 in)	111 years	50 of 100 (Notable)
21 September 2007	Orderville, US	daily rain	29.7 mm (1.2 in)	16.2 mm (0.6 in)	73 years	48 of 100 (Notable)
21 September 2007	Benson, US	daily rain	78.2 mm (3.1 in)	36.5 mm (1.4 in)	45 years	47 of 100 (Notable)
21 September 2007	Hinckley, US	daily rain	55.1 mm (2.2 in)	7.6 mm (0.30 in)	100 years	47 of 100 (Notable)
21 September 2007	Almeria/Aeropuerto, ES	daily rain	35.3 mm (1.4 in)	34.8 mm (1.4 in)	34 years	46 of 100 (Notable)
21 September 2007	Lynch, US	daily high min	20.6 C (69.1 F)	3.9 C (7.0 F)	98 years	45 of 100 (Notable)
21 September 2007	Greeley, US	daily high min	18.3 C (64.9 F)	2.7 C (4.9 F)	97 years	44 of 100 (Notable)
21 September 2007	Calera, MX	daily high min	20.6 C (69.1 F)	5.0 C (9.0 F)	44 years	43 of 100 (Notable)
21 September 2007	Melrose, US	daily rain	70.9 mm (2.8 in)	46.0 mm (1.8 in)	0 years	43 of 100 (Notable)
21 September 2007	Culbertson, US	daily high min	20.0 C (68.0 F)	1.7 C (3.1 F)	117 years	43 of 100 (Notable)
21 September 2007	Cuyamaca, US	daily low max	10.6 C (51.1 F)	2.7 C (4.9 F)	86 years	42 of 100 (Notable)
21 September 2007	Imperial, US	monthly low max	21.1 C (70.0 F)	1.1 C (2.0 F)	65 years	42 of 100 (Notable)
21 September 2007	Woodland 1 WNW, US	daily low max	20.6 C (69.1 F)	2.7 C (4.9 F)	96 years	42 of 100 (Notable)
21 September 2007	Ridgeland 1NNE, US	daily rain	65.0 mm (2.6 in)	34.0 mm (1.3 in)	26 years	42 of 100 (Notable)
21 September 2007	Redlands, US	daily low min	7.8 C (46.0 F)	0.5 C (0.9 F)	100 years	41 of 100 (Notable)
21 September 2007	Shoshone, US	daily rain	38.1 mm (1.5 in)	33.0 mm (1.3 in)	16 years	41 of 100 (Notable)
21 September 2007	Bergland Dam, US	daily rain	51.8 mm (2.0 in)	17.5 mm (0.7 in)	48 years	41 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 2007

Records set or tied on this calendar date in each year from 1805 to 2007. 2007 had 742 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 2007-09-21: 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 10	543
10 to 20	27
20 to 30	3
30 to 40	7
40 to 50	3
50 to 60	0
60 to 70	2