Weather Records on 21 September 2001

718 weather records were set or tied worldwide on 21 September 2001. Highest significance: Groningen-1, NL.

Key Facts for 21 September 2001

On 21 September 2001, 718 weather records were set or tied at long-record stations worldwide.
394 were record highs and 154 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 22 monthly and 693 daily.
Groningen-1 set a daily record precipitation of 40.5 mm (1.6 in) on 21 September 2001.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 449 records.

Record Map

718 stations

718 station records on 21 September 2001 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 2001: highest significance records shown on the map
Station	Country	Type	Value	Significance
Groningen-1	Netherlands	Record daily precipitation	40.5 mm (1.6 in)	64 of 100 (Major)
Cascade	United States	Record daily precipitation	139.7 mm (5.5 in)	63 of 100 (Major)
Eelde-1	Netherlands	Record daily precipitation	38.9 mm (1.5 in)	54 of 100 (Notable)
San Marcos	Mexico	Record low minimum temperature	15.6 C (60.1 F)	52 of 100 (Notable)
Eext	Netherlands	Record daily precipitation	33.1 mm (1.3 in)	50 of 100 (Notable)
East London	South Africa	Record low minimum temperature	3.1 C (37.6 F)	46 of 100 (Notable)
Matamoras	United States	Record daily precipitation	49.5 mm (1.9 in)	46 of 100 (Notable)
Niekerk	Netherlands	Record daily precipitation	30.5 mm (1.2 in)	45 of 100 (Notable)
Millbrook	United States	Record daily precipitation	55.9 mm (2.2 in)	43 of 100 (Notable)
Brownwood 2NE	United States	Record daily precipitation	76.2 mm (3.0 in)	43 of 100 (Notable)
Liberty 1 NE	United States	Record daily precipitation	42.4 mm (1.7 in)	41 of 100 (Notable)
Jever	Germany	Record daily precipitation	36.7 mm (1.4 in)	40 of 100 (Notable)
Canelas	Mexico	Record high maximum temperature	40.0 C (104.0 F)	40 of 100 (Notable)
Roden	Netherlands	Record daily precipitation	32.4 mm (1.3 in)	40 of 100 (Notable)
Sevilla/San Pablo	Spain	Record daily precipitation	35.8 mm (1.4 in)	40 of 100 (Notable)
Marshall	United States	Record daily precipitation	58.4 mm (2.3 in)	40 of 100 (Notable)
Gieterveen	Netherlands	Record daily precipitation	28.5 mm (1.1 in)	39 of 100 (Notable)
Olenja Rechka	Russia	Record daily precipitation	29.2 mm (1.1 in)	39 of 100 (Notable)
W Chester 2 NW	United States	Record daily precipitation	72.4 mm (2.9 in)	39 of 100 (Notable)
Velazco	Mexico	Record low minimum temperature	12.8 C (55.0 F)	38 of 100 (Notable)
Etla	Mexico	Record low minimum temperature	7.8 C (46.0 F)	37 of 100 (Notable)
Timovskoe	Russia	Record low maximum temperature	6.4 C (43.5 F)	37 of 100 (Notable)
Beaver Is	United States	Record daily precipitation	95.3 mm (3.8 in)	37 of 100 (Notable)
Grafton	United States	Record daily precipitation	35.6 mm (1.4 in)	37 of 100 (Notable)
Shanwei	China	Record daily precipitation	268.3 mm (10.6 in)	36 of 100 (Notable)
Grahamsville	United States	Record daily precipitation	45.7 mm (1.8 in)	36 of 100 (Notable)
Kershaw 1SW	United States	Record daily precipitation	41.4 mm (1.6 in)	36 of 100 (Notable)
San Miguel Ejutla	Mexico	Record high minimum temperature	18.9 C (66.0 F)	35 of 100 (Notable)
Aibonito 1 S	Puerto Rico [United States]	Record daily precipitation	45.7 mm (1.8 in)	35 of 100 (Notable)
Eenrum	Netherlands	Record daily precipitation	33.8 mm (1.3 in)	34 of 100 (Routine)
Dos Bocas	Puerto Rico [United States]	Record low maximum temperature	23.9 C (75.0 F)	34 of 100 (Routine)
Umba	Russia	Record high maximum temperature	16.8 C (62.2 F)	34 of 100 (Routine)
Downing	United States	Record daily precipitation	42.7 mm (1.7 in)	34 of 100 (Routine)
Sodankyla AWS	Finland	Record high minimum temperature	11.3 C (52.3 F)	33 of 100 (Routine)
Gridino	Russia	Record high maximum temperature	19.8 C (67.6 F)	33 of 100 (Routine)
Arhangelsk	Russia	Record high maximum temperature	21.0 C (69.8 F)	33 of 100 (Routine)
Middletown 2 NW	United States	Record daily precipitation	55.4 mm (2.2 in)	33 of 100 (Routine)
Myrrhee (Joelyn)	Australia	Record daily precipitation	36.0 mm (1.4 in)	32 of 100 (Routine)
Golmud	China	Record high maximum temperature	29.4 C (84.9 F)	32 of 100 (Routine)
Iturbide	Mexico	Record high minimum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Kojnas	Russia	Record high maximum temperature	19.2 C (66.6 F)	32 of 100 (Routine)
Tiree	United Kingdom	Record low minimum temperature	0.0 C (32.0 F)	32 of 100 (Routine)
Lehighton 1SSW	United States	Record daily precipitation	43.2 mm (1.7 in)	32 of 100 (Routine)
Wangerooge	Germany	Record daily precipitation	27.7 mm (1.1 in)	31 of 100 (Routine)
Kandalaksa	Russia	Record high maximum temperature	17.9 C (64.2 F)	31 of 100 (Routine)
Krasnoshelye	Russia	Record high maximum temperature	17.1 C (62.8 F)	31 of 100 (Routine)
Ostrov Sosnovez	Russia	Record high minimum temperature	9.9 C (49.8 F)	31 of 100 (Routine)
Ternej	Russia	Record low maximum temperature	10.7 C (51.3 F)	31 of 100 (Routine)
West Hartford Nepp	United States	Record daily precipitation	61.0 mm (2.4 in)	31 of 100 (Routine)
Tongio (Brooklands)	Australia	Record daily precipitation	26.0 mm (1.0 in)	30 of 100 (Routine)
Canelas	Mexico	Record low minimum temperature	10.0 C (50.0 F)	30 of 100 (Routine)
Sihccajavri	Norway	Record high minimum temperature	9.1 C (48.4 F)	30 of 100 (Routine)
Skovorodino	Russia	Record low minimum temperature	-10.9 C (12.4 F)	30 of 100 (Routine)
Sovetskaja Gavan	Russia	Record low maximum temperature	9.3 C (48.7 F)	30 of 100 (Routine)
Karesuando	Sweden	Record high minimum temperature	9.3 C (48.7 F)	30 of 100 (Routine)
Carefree	United States	Record high minimum temperature	28.9 C (84.0 F)	30 of 100 (Routine)
Marietta 5SW	United States	Record daily precipitation	51.1 mm (2.0 in)	30 of 100 (Routine)
Palm 3 SE	United States	Record daily precipitation	50.5 mm (2.0 in)	30 of 100 (Routine)
Tahoka	United States	Record high maximum temperature	36.7 C (98.1 F)	30 of 100 (Routine)
Opaeula 870	United States	Record low minimum temperature	11.7 C (53.1 F)	30 of 100 (Routine)

Counts by Type and Timescale

718 records

Records set or tied on 21 September 2001 by type: Highest daily maximum 240, Lowest daily maximum 76, Highest daily minimum 154, Lowest daily minimum 78, Heaviest daily rainfall 169, Deepest snow cover 1.

Records on 21 September 2001 by type
Record type	Records
Highest daily maximum	240
Lowest daily maximum	76
Highest daily minimum	154
Lowest daily minimum	78
Heaviest daily rainfall	169
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 21 September 2001 by timescale: all-time 3, monthly 22, daily 693.

How Much Records Were Beaten By

538 broken records

Margins by which the 538 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 350.0. Ties are not counted.

Top 20 by Significance

21 September 2001

Top 20 records on 21 September 2001 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2001	Groningen-1, NL	daily rain	40.5 mm (1.6 in)	22.8 mm (0.9 in)	48 years	64 of 100 (Major)
21 September 2001	Cascade, US	all-time rain	139.7 mm (5.5 in)	30.5 mm (1.2 in)	50 years	63 of 100 (Major)
21 September 2001	Eelde-1, NL	daily rain	38.9 mm (1.5 in)	21.0 mm (0.8 in)	48 years	54 of 100 (Notable)
21 September 2001	San Marcos, MX	daily low min	15.6 C (60.1 F)	4.4 C (7.9 F)	34 years	52 of 100 (Notable)
21 September 2001	Eext, NL	daily rain	33.1 mm (1.3 in)	18.1 mm (0.7 in)	48 years	50 of 100 (Notable)
21 September 2001	East London, ZA	daily low min	3.1 C (37.6 F)	5.5 C (9.9 F)	60 years	46 of 100 (Notable)
21 September 2001	Matamoras, US	daily rain	49.5 mm (1.9 in)	20.3 mm (0.8 in)	80 years	46 of 100 (Notable)
21 September 2001	Niekerk, NL	daily rain	30.5 mm (1.2 in)	15.4 mm (0.6 in)	48 years	45 of 100 (Notable)
21 September 2001	Millbrook, US	daily rain	55.9 mm (2.2 in)	35.6 mm (1.4 in)	38 years	43 of 100 (Notable)
21 September 2001	Brownwood 2NE, US	daily rain	76.2 mm (3.0 in)	6.6 mm (0.26 in)	100 years	43 of 100 (Notable)
21 September 2001	Liberty 1 NE, US	daily rain	42.4 mm (1.7 in)	8.1 mm (0.32 in)	88 years	41 of 100 (Notable)
21 September 2001	Jever, DE	daily rain	36.7 mm (1.4 in)	15.1 mm (0.6 in)	28 years	40 of 100 (Notable)
21 September 2001	Canelas, MX	all-time high max	40.0 C (104.0 F)	1.1 C (2.0 F)	37 years	40 of 100 (Notable)
21 September 2001	Roden, NL	daily rain	32.4 mm (1.3 in)	12.6 mm (0.5 in)	48 years	40 of 100 (Notable)
21 September 2001	Sevilla/San Pablo, ES	daily rain	35.8 mm (1.4 in)	31.8 mm (1.3 in)	20 years	40 of 100 (Notable)
21 September 2001	Marshall, US	daily rain	58.4 mm (2.3 in)	10.1 mm (0.4 in)	86 years	40 of 100 (Notable)
21 September 2001	Gieterveen, NL	daily rain	28.5 mm (1.1 in)	11.2 mm (0.4 in)	47 years	39 of 100 (Notable)
21 September 2001	Olenja Rechka, RU	daily rain	29.2 mm (1.1 in)	13.8 mm (0.5 in)	38 years	39 of 100 (Notable)
21 September 2001	W Chester 2 NW, US	daily rain	72.4 mm (2.9 in)	20.8 mm (0.8 in)	63 years	39 of 100 (Notable)
21 September 2001	Velazco, MX	daily low min	12.8 C (55.0 F)	6.1 C (11.0 F)	28 years	38 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 2001

Records set or tied on this calendar date in each year from 1805 to 2001. 2001 had 718 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 2001-09-21: 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 50	537
50 to 100	0
100 to 150	0
150 to 200	0
200 to 250	0
250 to 300	0
300 to 350	1