Weather Records on 11 September 2001

826 weather records were set or tied worldwide on 11 September 2001. Highest significance: Booleroo (Wimont), AU.

Key Facts for 11 September 2001

On 11 September 2001, 826 weather records were set or tied at long-record stations worldwide.
338 were record highs and 292 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 26 monthly and 800 daily.
Booleroo (Wimont) set a daily record precipitation of 25.6 mm (1.0 in) on 11 September 2001.
Across 164 earlier years (1809 to 2026) the same calendar date averaged 421 records.

Record Map

826 stations

826 station records on 11 September 2001 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 September 2001: highest significance records shown on the map
Station	Country	Type	Value	Significance
Booleroo (Wimont)	Australia	Record daily precipitation	25.6 mm (1.0 in)	56 of 100 (Notable)
Bremerhaven	Germany	Record daily precipitation	38.9 mm (1.5 in)	51 of 100 (Notable)
Genthin	Germany	Record daily precipitation	28.6 mm (1.1 in)	50 of 100 (Notable)
Konigsmoor	Germany	Record daily precipitation	27.8 mm (1.1 in)	49 of 100 (Notable)
Bemidji	United States	Record daily precipitation	31.5 mm (1.2 in)	49 of 100 (Notable)
Emporia 1 WNW	United States	Record daily precipitation	71.1 mm (2.8 in)	49 of 100 (Notable)
Asahikawa	Japan	Record daily precipitation	94.0 mm (3.7 in)	47 of 100 (Notable)
Sapporo	Japan	Record daily precipitation	116.1 mm (4.6 in)	47 of 100 (Notable)
Ristna	Estonia	Record daily precipitation	25.9 mm (1.0 in)	45 of 100 (Notable)
Osijek	Croatia	Record low maximum temperature	13.6 C (56.5 F)	45 of 100 (Notable)
Mount Ive	Australia	Record daily precipitation	27.6 mm (1.1 in)	44 of 100 (Notable)
Banka Banka	Australia	Record daily precipitation	31.6 mm (1.2 in)	43 of 100 (Notable)
Bjelasnica	Bosnia and Herzegovina	Record low minimum temperature	-4.1 C (24.6 F)	43 of 100 (Notable)
San Salvador El Seco	Mexico	Record daily precipitation	62.0 mm (2.4 in)	43 of 100 (Notable)
Sarajevo	Bosnia and Herzegovina	Record daily precipitation	38.7 mm (1.5 in)	42 of 100 (Notable)
Debrecen Airport	Hungary	Record low maximum temperature	11.8 C (53.2 F)	42 of 100 (Notable)
Craiova	Romania	Record daily precipitation	32.9 mm (1.3 in)	42 of 100 (Notable)
Falcon Dam	United States	Record daily precipitation	74.2 mm (2.9 in)	42 of 100 (Notable)
Sarajevo	Bosnia and Herzegovina	Record low maximum temperature	8.4 C (47.1 F)	41 of 100 (Notable)
Szeged	Hungary	Record low maximum temperature	12.3 C (54.1 F)	41 of 100 (Notable)
Tokyo	Japan	Record daily precipitation	109.0 mm (4.3 in)	40 of 100 (Notable)
Pastora	Mexico	Record daily precipitation	42.4 mm (1.7 in)	40 of 100 (Notable)
La Sonadora	Mexico	Record daily precipitation	85.1 mm (3.4 in)	40 of 100 (Notable)
Rioverde (Dge)	Mexico	Record daily precipitation	44.2 mm (1.7 in)	39 of 100 (Notable)
Salzwedel	Germany	Record daily precipitation	25.5 mm (1.0 in)	37 of 100 (Notable)
San Marcos	Mexico	Record low minimum temperature	17.2 C (63.0 F)	37 of 100 (Notable)
Asuncion Nochixtlan	Mexico	Record high maximum temperature	33.9 C (93.0 F)	37 of 100 (Notable)
Chappells 2 NNW	United States	Record daily precipitation	38.4 mm (1.5 in)	37 of 100 (Notable)
Ixcateopan de Tlapa	Mexico	Record daily precipitation	48.5 mm (1.9 in)	36 of 100 (Notable)
Botosani	Romania	Record daily precipitation	30.2 mm (1.2 in)	36 of 100 (Notable)
Urakawa	Japan	Record daily precipitation	79.0 mm (3.1 in)	35 of 100 (Notable)
Hakodate	Japan	Record daily precipitation	97.0 mm (3.8 in)	35 of 100 (Notable)
Arad	Romania	Record low maximum temperature	11.3 C (52.3 F)	35 of 100 (Notable)
Teriberka	Russia	Record high maximum temperature	20.5 C (68.9 F)	35 of 100 (Notable)
Grace	United States	Record high maximum temperature	31.7 C (89.1 F)	35 of 100 (Notable)
Klaipeda	Lithuania	Record daily precipitation	28.2 mm (1.1 in)	34 of 100 (Routine)
Canelas	Mexico	Record low minimum temperature	10.6 C (51.1 F)	34 of 100 (Routine)
La Estancia	Mexico	Record low maximum temperature	26.7 C (80.1 F)	34 of 100 (Routine)
Sihccajavri	Norway	Record high minimum temperature	10.5 C (50.9 F)	34 of 100 (Routine)
Huixtla	Mexico	Record low minimum temperature	18.3 C (64.9 F)	33 of 100 (Routine)
Rayon	Mexico	Record daily precipitation	95.3 mm (3.8 in)	33 of 100 (Routine)
Galati	Romania	Record daily precipitation	26.4 mm (1.0 in)	33 of 100 (Routine)
Zugspitze	Germany	Record low maximum temperature	-6.6 C (20.1 F)	32 of 100 (Routine)
Heraklion	Greece	Record high maximum temperature	34.2 C (93.6 F)	32 of 100 (Routine)
Ticuman	Mexico	Record daily precipitation	63.8 mm (2.5 in)	32 of 100 (Routine)
Berlin-Tempelhof	Germany	Record low maximum temperature	12.5 C (54.5 F)	31 of 100 (Routine)
Berlin-Tegel	Germany	Record low maximum temperature	12.2 C (54.0 F)	31 of 100 (Routine)
Miercurea Ciuc	Romania	Record daily precipitation	36.1 mm (1.4 in)	31 of 100 (Routine)
Shenkursk	Russia	Record high minimum temperature	14.4 C (57.9 F)	31 of 100 (Routine)
Opaeula 870	United States	Record low minimum temperature	13.3 C (55.9 F)	31 of 100 (Routine)
Puerto de Valles	Mexico	Record daily precipitation	102.6 mm (4.0 in)	30 of 100 (Routine)
Pte de Chassiron	France	Record low minimum temperature	11.0 C (51.8 F)	29 of 100 (Routine)
Iasi	Romania	Record daily precipitation	25.2 mm (1.0 in)	29 of 100 (Routine)
Kanin Nos	Russia	Record high minimum temperature	10.5 C (50.9 F)	29 of 100 (Routine)
Krasnoshelye	Russia	Record high maximum temperature	19.1 C (66.4 F)	29 of 100 (Routine)
Karesuando	Sweden	Record high minimum temperature	11.2 C (52.2 F)	29 of 100 (Routine)
Hachijojima	Japan	Record daily precipitation	82.8 mm (3.3 in)	28 of 100 (Routine)
El Pueblito	Mexico	Record low maximum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Novi Sad	Serbia	Record low maximum temperature	12.3 C (54.1 F)	28 of 100 (Routine)
Tiksi	Russia	Record low maximum temperature	-2.7 C (27.1 F)	28 of 100 (Routine)

Counts by Type and Timescale

826 records

Records set or tied on 11 September 2001 by type: Highest daily maximum 150, Lowest daily maximum 170, Highest daily minimum 188, Lowest daily minimum 122, Heaviest daily rainfall 196.

Records on 11 September 2001 by type
Record type	Records
Highest daily maximum	150
Lowest daily maximum	170
Highest daily minimum	188
Lowest daily minimum	122
Heaviest daily rainfall	196
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 September 2001 by timescale: all-time 0, monthly 26, daily 800.

How Much Records Were Beaten By

622 broken records

Margins by which the 622 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 83.1. Ties are not counted.

Top 20 by Significance

11 September 2001

Top 20 records on 11 September 2001 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 September 2001	Booleroo (Wimont), AU	daily rain	25.6 mm (1.0 in)	10.4 mm (0.4 in)	95 years	56 of 100 (Notable)
11 September 2001	Bremerhaven, DE	daily rain	38.9 mm (1.5 in)	26.0 mm (1.0 in)	23 years	51 of 100 (Notable)
11 September 2001	Genthin, DE	daily rain	28.6 mm (1.1 in)	17.3 mm (0.7 in)	31 years	50 of 100 (Notable)
11 September 2001	Konigsmoor, DE	daily rain	27.8 mm (1.1 in)	15.1 mm (0.6 in)	44 years	49 of 100 (Notable)
11 September 2001	Bemidji, US	daily rain	31.5 mm (1.2 in)	17.8 mm (0.7 in)	71 years	49 of 100 (Notable)
11 September 2001	Emporia 1 WNW, US	daily rain	71.1 mm (2.8 in)	38.8 mm (1.5 in)	60 years	49 of 100 (Notable)
11 September 2001	Asahikawa, JP	daily rain	94.0 mm (3.7 in)	50.6 mm (2.0 in)	7 years	47 of 100 (Notable)
11 September 2001	Sapporo, JP	daily rain	116.1 mm (4.6 in)	83.1 mm (3.3 in)	7 years	47 of 100 (Notable)
11 September 2001	Ristna, EE	daily rain	25.9 mm (1.0 in)	18.3 mm (0.7 in)	16 years	45 of 100 (Notable)
11 September 2001	Osijek, HR	daily low max	13.6 C (56.5 F)	2.5 C (4.5 F)	101 years	45 of 100 (Notable)
11 September 2001	Mount Ive, AU	daily rain	27.6 mm (1.1 in)	16.4 mm (0.6 in)	12 years	44 of 100 (Notable)
11 September 2001	Banka Banka, AU	daily rain	31.6 mm (1.2 in)	28.6 mm (1.1 in)	16 years	43 of 100 (Notable)
11 September 2001	Bjelasnica, BA	daily low min	-4.1 C (24.6 F)	1.4 C (2.5 F)	101 years	43 of 100 (Notable)
11 September 2001	San Salvador El Seco, MX	daily rain	62.0 mm (2.4 in)	41.2 mm (1.6 in)	30 years	43 of 100 (Notable)
11 September 2001	Sarajevo, BA	daily rain	38.7 mm (1.5 in)	4.7 mm (0.19 in)	95 years	42 of 100 (Notable)
11 September 2001	Debrecen Airport, HU	daily low max	11.8 C (53.2 F)	2.8 C (5.0 F)	88 years	42 of 100 (Notable)
11 September 2001	Craiova, RO	daily rain	32.9 mm (1.3 in)	28.1 mm (1.1 in)	28 years	42 of 100 (Notable)
11 September 2001	Falcon Dam, US	daily rain	74.2 mm (2.9 in)	60.2 mm (2.4 in)	30 years	42 of 100 (Notable)
11 September 2001	Sarajevo, BA	daily low max	8.4 C (47.1 F)	3.5 C (6.3 F)	86 years	41 of 100 (Notable)
11 September 2001	Szeged, HU	daily low max	12.3 C (54.1 F)	2.7 C (4.9 F)	88 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

1809 to 2001

Records set or tied on this calendar date in each year from 1809 to 2001. 2001 had 826 records.

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

Records on 09-11 in each year
Year	Records
1809	1
1814	3
1818	1
1830	1
1836	1
1838	3
1839	1
1848	1
1850	1
1851	1
1854	2
1858	1
1860	2
1861	1
1863	2
1865	3
1866	1
1874	2
1876	1
1877	1
1879	1
1880	1
1882	4
1883	2
1884	1
1886	1
1888	2
1889	4
1890	2
1891	2
1892	1
1893	4
1894	2
1895	4
1896	1
1897	3
1898	3
1899	5
1900	1
1901	3
1902	15
1903	13
1904	4
1905	5
1906	10
1907	9
1908	20
1909	12
1910	19
1911	9
1912	25
1913	22
1914	52
1915	160
1916	17
1917	88
1918	62
1919	52
1920	158
1921	52
1922	78
1923	44
1924	290
1925	260
1926	137
1927	300
1928	127
1929	206
1930	136
1931	868
1932	210
1933	276
1934	144
1935	410
1936	567
1937	324
1938	288
1939	561
1940	891
1941	210
1942	234
1943	335
1944	446
1945	341
1946	262
1947	611
1948	424
1949	450
1950	462
1951	247
1952	549
1953	392
1954	363
1955	479
1956	539
1957	470
1958	748
1959	488
1960	423
1961	524
1962	480
1963	359
1964	1,195
1965	414
1966	392
1967	478
1968	835
1969	685
1970	474
1971	464
1972	507
1973	612
1974	430
1975	644
1976	920
1977	406
1978	911
1979	596
1980	474
1981	347
1982	862
1983	1,243
1984	888
1985	844
1986	1,221
1987	595
1988	1,019
1989	1,301
1990	840
1991	843
1992	672
1993	809
1994	713
1995	619
1996	1,030
1997	808
1998	1,821
1999	1,073
2000	1,469
2001	826
2002	1,059
2003	1,022
2004	740
2005	1,163
2006	1,132
2007	947
2008	916
2009	774
2010	965
2011	1,051
2012	687
2013	1,207
2014	1,100
2015	683
2016	677
2017	916
2018	763
2019	806
2020	1,235
2021	851
2022	617
2023	1,034
2024	889
2025	917
2026	615

Download the Data

Data for records on 2001-09-11: 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	590
20 to 40	21
40 to 60	6
60 to 80	3
80 to 100	2