Weather Records on 18 September 2001

993 weather records were set or tied worldwide on 18 September 2001. Highest significance: Altentreptow, DE.

Key Facts for 18 September 2001

On 18 September 2001, 993 weather records were set or tied at long-record stations worldwide.
466 were record highs and 209 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 24 monthly and 967 daily.
Altentreptow set a daily record precipitation of 35.3 mm (1.4 in) on 18 September 2001.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 418 records.

Record Map

993 stations

993 station records on 18 September 2001 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 2001: highest significance records shown on the map
Station	Country	Type	Value	Significance
Altentreptow	Germany	Record daily precipitation	35.3 mm (1.4 in)	73 of 100 (Major)
Angermunde	Germany	Record daily precipitation	33.8 mm (1.3 in)	72 of 100 (Major)
Bom Jesus da Lapa	Brazil	Record daily precipitation	33.0 mm (1.3 in)	70 of 100 (Major)
Madison	United States	Record daily precipitation	69.9 mm (2.8 in)	65 of 100 (Major)
Fall Rvr Lake	United States	Record daily precipitation	110.5 mm (4.4 in)	64 of 100 (Major)
Zehdenick	Germany	Record daily precipitation	31.5 mm (1.2 in)	59 of 100 (Notable)
Yates Ctr	United States	Record daily precipitation	126.5 mm (5.0 in)	59 of 100 (Notable)
Warrenton 1 N	United States	Record daily precipitation	68.6 mm (2.7 in)	57 of 100 (Notable)
Trelleborg	Sweden	Record daily precipitation	37.1 mm (1.5 in)	56 of 100 (Notable)
Volkovysk	Belarus	Record daily precipitation	41.9 mm (1.6 in)	55 of 100 (Notable)
Virgil	United States	Record daily precipitation	121.2 mm (4.8 in)	55 of 100 (Notable)
Wismar	Germany	Record daily precipitation	31.1 mm (1.2 in)	54 of 100 (Notable)
Bloomington Indiana UNIV	United States	Record daily precipitation	94.0 mm (3.7 in)	54 of 100 (Notable)
Eureka 1E	United States	Record daily precipitation	103.9 mm (4.1 in)	54 of 100 (Notable)
Kirchdorf/Poel	Germany	Record daily precipitation	26.5 mm (1.0 in)	53 of 100 (Notable)
Waren	Germany	Record daily precipitation	30.1 mm (1.2 in)	52 of 100 (Notable)
Rosalia 1NW	United States	Record daily precipitation	132.1 mm (5.2 in)	52 of 100 (Notable)
Neustrelitz	Germany	Record daily precipitation	30.0 mm (1.2 in)	51 of 100 (Notable)
Goldberg	Germany	Record daily precipitation	27.8 mm (1.1 in)	51 of 100 (Notable)
Thrall 3SSE	United States	Record daily precipitation	85.1 mm (3.4 in)	51 of 100 (Notable)
Claflin	United States	Record daily precipitation	81.3 mm (3.2 in)	50 of 100 (Notable)
Newton	United States	Record daily precipitation	97.3 mm (3.8 in)	48 of 100 (Notable)
Shawnee	United States	Record daily precipitation	78.2 mm (3.1 in)	48 of 100 (Notable)
Falsterbo	Sweden	Record daily precipitation	26.4 mm (1.0 in)	47 of 100 (Notable)
Tvingelshed	Sweden	Record daily precipitation	46.3 mm (1.8 in)	47 of 100 (Notable)
Kalmar_D	Sweden	Record daily precipitation	32.1 mm (1.3 in)	47 of 100 (Notable)
Nybro-Slattingebygd D	Sweden	Record daily precipitation	45.1 mm (1.8 in)	47 of 100 (Notable)
Geneseo	United States	Record daily precipitation	134.6 mm (5.3 in)	47 of 100 (Notable)
Pruzany	Belarus	Record daily precipitation	43.1 mm (1.7 in)	46 of 100 (Notable)
Weddingstedt	Germany	Record daily precipitation	35.2 mm (1.4 in)	46 of 100 (Notable)
Segerstad	Sweden	Record daily precipitation	25.5 mm (1.0 in)	46 of 100 (Notable)
Mjuamala	Sweden	Record daily precipitation	47.6 mm (1.9 in)	46 of 100 (Notable)
Oswego 1 N	United States	Record daily precipitation	115.6 mm (4.6 in)	46 of 100 (Notable)
Hyltan	Sweden	Record daily precipitation	33.7 mm (1.3 in)	45 of 100 (Notable)
Avon Park 2 W	United States	Record low minimum temperature	17.8 C (64.0 F)	45 of 100 (Notable)
Cassoday 2SE	United States	Record daily precipitation	105.2 mm (4.1 in)	45 of 100 (Notable)
Chanute Martin Johnson AP	United States	Record daily precipitation	90.2 mm (3.6 in)	44 of 100 (Notable)
Paso de Arocha	Mexico	Record daily precipitation	192.5 mm (7.6 in)	43 of 100 (Notable)
St. Petersburg	Russia	Record high maximum temperature	22.7 C (72.9 F)	43 of 100 (Notable)
Burdett 3S	United States	Record daily precipitation	68.1 mm (2.7 in)	43 of 100 (Notable)
Moran	United States	Record daily precipitation	63.0 mm (2.5 in)	43 of 100 (Notable)
Oakley 4W	United States	Record daily precipitation	47.2 mm (1.9 in)	43 of 100 (Notable)
Yemassee 1 N	United States	Record low minimum temperature	7.8 C (46.0 F)	43 of 100 (Notable)
Petropavlovsk-Kamchatskij	Russia	Record low maximum temperature	6.5 C (43.7 F)	42 of 100 (Notable)
Malmo	Sweden	Record daily precipitation	25.3 mm (1.0 in)	42 of 100 (Notable)
Ronneby-Bredakra	Sweden	Record daily precipitation	32.4 mm (1.3 in)	42 of 100 (Notable)
Holyoke	United States	Record daily precipitation	62.2 mm (2.4 in)	42 of 100 (Notable)
Milledgeville	United States	Record low minimum temperature	8.9 C (48.0 F)	42 of 100 (Notable)
Suchiate	Mexico	Record low minimum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Rosario	Mexico	Record daily precipitation	153.9 mm (6.1 in)	41 of 100 (Notable)
Freiburg/Elbe	Germany	Record daily precipitation	33.5 mm (1.3 in)	40 of 100 (Notable)
Rorsbo	Sweden	Record daily precipitation	49.8 mm (2.0 in)	40 of 100 (Notable)
Saint Bernard	United States	Record high minimum temperature	23.3 C (73.9 F)	40 of 100 (Notable)
Williamsburg	United States	Record daily precipitation	62.0 mm (2.4 in)	40 of 100 (Notable)
Brackettville	United States	Record low maximum temperature	24.4 C (75.9 F)	40 of 100 (Notable)
Gluckstadt	Germany	Record daily precipitation	30.0 mm (1.2 in)	39 of 100 (Notable)
Canelas	Mexico	Record low minimum temperature	10.6 C (51.1 F)	39 of 100 (Notable)
Asuncion Nochixtlan	Mexico	Record high maximum temperature	32.8 C (91.0 F)	39 of 100 (Notable)
Hoby	Sweden	Record daily precipitation	26.0 mm (1.0 in)	39 of 100 (Notable)
Lessebo	Sweden	Record daily precipitation	48.3 mm (1.9 in)	39 of 100 (Notable)

Counts by Type and Timescale

993 records

Records set or tied on 18 September 2001 by type: Highest daily maximum 261, Lowest daily maximum 78, Highest daily minimum 205, Lowest daily minimum 131, Heaviest daily rainfall 316, Deepest snow cover 2.

Records on 18 September 2001 by type
Record type	Records
Highest daily maximum	261
Lowest daily maximum	78
Highest daily minimum	205
Lowest daily minimum	131
Heaviest daily rainfall	316
Heaviest daily snowfall	0
Deepest snow cover	2

Records on 18 September 2001 by timescale: all-time 2, monthly 24, daily 967.

How Much Records Were Beaten By

826 broken records

Margins by which the 826 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 300.0. Ties are not counted.

Top 20 by Significance

18 September 2001

Top 20 records on 18 September 2001 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 2001	Altentreptow, DE	daily rain	35.3 mm (1.4 in)	17.6 mm (0.7 in)	92 years	73 of 100 (Major)
18 September 2001	Angermunde, DE	daily rain	33.8 mm (1.3 in)	16.5 mm (0.6 in)	92 years	72 of 100 (Major)
18 September 2001	Bom Jesus da Lapa, BR	daily rain	33.0 mm (1.3 in)	32.8 mm (1.3 in)	76 years	70 of 100 (Major)
18 September 2001	Madison, US	daily rain	69.9 mm (2.8 in)	50.8 mm (2.0 in)	90 years	65 of 100 (Major)
18 September 2001	Fall Rvr Lake, US	daily rain	110.5 mm (4.4 in)	72.4 mm (2.9 in)	52 years	64 of 100 (Major)
18 September 2001	Zehdenick, DE	daily rain	31.5 mm (1.2 in)	23.3 mm (0.9 in)	48 years	59 of 100 (Notable)
18 September 2001	Yates Ctr, US	daily rain	126.5 mm (5.0 in)	88.4 mm (3.5 in)	30 years	59 of 100 (Notable)
18 September 2001	Warrenton 1 N, US	daily rain	68.6 mm (2.7 in)	38.1 mm (1.5 in)	80 years	57 of 100 (Notable)
18 September 2001	Trelleborg, SE	daily rain	37.1 mm (1.5 in)	28.1 mm (1.1 in)	36 years	56 of 100 (Notable)
18 September 2001	Volkovysk, BY	daily rain	41.9 mm (1.6 in)	25.5 mm (1.0 in)	39 years	55 of 100 (Notable)
18 September 2001	Virgil, US	daily rain	121.2 mm (4.8 in)	103.2 mm (4.1 in)	36 years	55 of 100 (Notable)
18 September 2001	Wismar, DE	daily rain	31.1 mm (1.2 in)	23.5 mm (0.9 in)	30 years	54 of 100 (Notable)
18 September 2001	Bloomington Indiana UNIV, US	daily rain	94.0 mm (3.7 in)	58.4 mm (2.3 in)	15 years	54 of 100 (Notable)
18 September 2001	Eureka 1E, US	daily rain	103.9 mm (4.1 in)	65.8 mm (2.6 in)	35 years	54 of 100 (Notable)
18 September 2001	Kirchdorf/Poel, DE	daily rain	26.5 mm (1.0 in)	8.4 mm (0.33 in)	87 years	53 of 100 (Notable)
18 September 2001	Waren, DE	daily rain	30.1 mm (1.2 in)	8.0 mm (0.31 in)	92 years	52 of 100 (Notable)
18 September 2001	Rosalia 1NW, US	monthly rain	132.1 mm (5.2 in)	51.1 mm (2.0 in)	27 years	52 of 100 (Notable)
18 September 2001	Neustrelitz, DE	daily rain	30.0 mm (1.2 in)	18.9 mm (0.7 in)	23 years	51 of 100 (Notable)
18 September 2001	Goldberg, DE	daily rain	27.8 mm (1.1 in)	7.0 mm (0.28 in)	87 years	51 of 100 (Notable)
18 September 2001	Thrall 3SSE, US	daily rain	85.1 mm (3.4 in)	66.6 mm (2.6 in)	23 years	51 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

1803 to 2001

Records set or tied on this calendar date in each year from 1803 to 2001. 2001 had 993 records.

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

Records on 09-18 in each year
Year	Records
1803	1
1811	1
1814	1
1819	1
1829	1
1832	1
1834	1
1835	1
1837	2
1847	2
1848	1
1849	1
1851	4
1859	1
1861	1
1865	1
1869	1
1871	1
1875	1
1876	2
1877	1
1879	1
1880	1
1881	1
1882	1
1885	1
1886	4
1889	6
1890	1
1891	1
1893	4
1894	2
1895	2
1896	4
1897	3
1898	5
1899	3
1900	2
1901	10
1902	8
1903	58
1904	6
1905	22
1906	16
1907	4
1908	11
1909	17
1910	5
1911	8
1912	43
1913	44
1914	56
1915	41
1916	58
1917	99
1918	57
1919	48
1920	56
1921	213
1922	45
1923	114
1924	62
1925	269
1926	205
1927	189
1928	114
1929	309
1930	124
1931	429
1932	226
1933	370
1934	188
1935	281
1936	155
1937	422
1938	373
1939	190
1940	402
1941	318
1942	1,001
1943	624
1944	503
1945	732
1946	576
1947	927
1948	427
1949	356
1950	370
1951	320
1952	340
1953	245
1954	446
1955	672
1956	587
1957	429
1958	491
1959	829
1960	351
1961	478
1962	360
1963	453
1964	282
1965	1,172
1966	498
1967	357
1968	763
1969	424
1970	377
1971	1,245
1972	691
1973	593
1974	559
1975	976
1976	615
1977	619
1978	1,162
1979	709
1980	652
1981	1,671
1982	603
1983	936
1984	951
1985	636
1986	730
1987	1,244
1988	997
1989	778
1990	904
1991	1,377
1992	821
1993	747
1994	852
1995	935
1996	1,237
1997	935
1998	1,038
1999	583
2000	1,146
2001	993
2002	828
2003	815
2004	1,027
2005	781
2006	1,309
2007	670
2008	697
2009	692
2010	1,040
2011	1,050
2012	922
2013	666
2014	682
2015	934
2016	893
2017	518
2018	1,200
2019	768
2020	682
2021	582
2022	613
2023	639
2024	687
2025	471
2026	864

Download the Data

Data for records on 2001-09-18: 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 50	810
50 to 100	13
100 to 150	2
150 to 200	0
200 to 250	0
250 to 300	1