Weather Records on 18 September 2011

1,050 weather records were set or tied worldwide on 18 September 2011. Highest significance: Nora_D, SE.

Key Facts for 18 September 2011

On 18 September 2011, 1,050 weather records were set or tied at long-record stations worldwide.
353 were record highs and 337 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 15 monthly and 1,035 daily.
Nora_D set a daily record precipitation of 40.8 mm (1.6 in) on 18 September 2011.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 417 records.

Record Map

1,050 stations

1,050 station records on 18 September 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nora_D	Sweden	Record daily precipitation	40.8 mm (1.6 in)	76 of 100 (Major)
Flahult	Sweden	Record daily precipitation	36.7 mm (1.4 in)	68 of 100 (Major)
Skillingaryd	Sweden	Record daily precipitation	37.0 mm (1.5 in)	64 of 100 (Major)
Huskvarna	Sweden	Record daily precipitation	29.4 mm (1.2 in)	62 of 100 (Major)
Kavsjo_D	Sweden	Record daily precipitation	26.9 mm (1.1 in)	55 of 100 (Notable)
Skovde	Sweden	Record daily precipitation	32.2 mm (1.3 in)	55 of 100 (Notable)
Hedal I Valdres II	Norway	Record daily precipitation	43.0 mm (1.7 in)	54 of 100 (Notable)
Visingso	Sweden	Record daily precipitation	25.0 mm (1.0 in)	53 of 100 (Notable)
Aldervale	Australia	Record daily precipitation	25.2 mm (1.0 in)	52 of 100 (Notable)
Mittenwald-Buckelwiesen	Germany	Record daily precipitation	53.6 mm (2.1 in)	52 of 100 (Notable)
Hiasen I Sigdal	Norway	Record daily precipitation	38.5 mm (1.5 in)	52 of 100 (Notable)
Melsom	Norway	Record daily precipitation	54.7 mm (2.2 in)	52 of 100 (Notable)
Saffle	Sweden	Record daily precipitation	46.5 mm (1.8 in)	52 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	108.2 mm (4.3 in)	52 of 100 (Notable)
Doberlug-Kirchhain	Germany	Record daily precipitation	30.9 mm (1.2 in)	51 of 100 (Notable)
Motala	Sweden	Record daily precipitation	26.7 mm (1.1 in)	51 of 100 (Notable)
Mariestad	Sweden	Record daily precipitation	39.7 mm (1.6 in)	51 of 100 (Notable)
Lead Hill	United States	Record daily precipitation	68.3 mm (2.7 in)	51 of 100 (Notable)
Omaha	United States	Record daily precipitation	127.5 mm (5.0 in)	51 of 100 (Notable)
Fagre	Sweden	Record daily precipitation	38.0 mm (1.5 in)	50 of 100 (Notable)
Atorp	Sweden	Record daily precipitation	31.1 mm (1.2 in)	50 of 100 (Notable)
El Barril	Mexico	Record low minimum temperature	12.2 C (54.0 F)	49 of 100 (Notable)
Svaneholm	Sweden	Record daily precipitation	41.9 mm (1.6 in)	49 of 100 (Notable)
Dejefors	Sweden	Record daily precipitation	44.7 mm (1.8 in)	49 of 100 (Notable)
Berryville 6 NW	United States	Record daily precipitation	108.2 mm (4.3 in)	49 of 100 (Notable)
Eureka Springs 3 WNW	United States	Record daily precipitation	99.1 mm (3.9 in)	49 of 100 (Notable)
Goessel 2 NW	United States	Record daily precipitation	70.1 mm (2.8 in)	49 of 100 (Notable)
Mason City	United States	Record low maximum temperature	10.0 C (50.0 F)	49 of 100 (Notable)
Foldsae	Norway	Record daily precipitation	45.2 mm (1.8 in)	48 of 100 (Notable)
Lifjell	Norway	Record daily precipitation	47.1 mm (1.9 in)	48 of 100 (Notable)
Postmyr I Drangedal	Norway	Record daily precipitation	43.7 mm (1.7 in)	48 of 100 (Notable)
Newberry	United States	Record low maximum temperature	17.8 C (64.0 F)	48 of 100 (Notable)
Brunswick Junction	Australia	Record daily precipitation	39.6 mm (1.6 in)	47 of 100 (Notable)
Sandefjord	Norway	Record daily precipitation	47.0 mm (1.9 in)	47 of 100 (Notable)
Hoidalen I Solum	Norway	Record daily precipitation	47.0 mm (1.9 in)	47 of 100 (Notable)
Algaras	Sweden	Record daily precipitation	57.5 mm (2.3 in)	47 of 100 (Notable)
Tyler Pounds Fld	United States	Record daily precipitation	31.2 mm (1.2 in)	47 of 100 (Notable)
Rosa Brook	Australia	Record daily precipitation	34.0 mm (1.3 in)	46 of 100 (Notable)
Atequiza	Mexico	Record daily precipitation	52.1 mm (2.1 in)	46 of 100 (Notable)
Sanne	Sweden	Record daily precipitation	38.1 mm (1.5 in)	46 of 100 (Notable)
Donnybrook	Australia	Record daily precipitation	27.4 mm (1.1 in)	45 of 100 (Notable)
Houston	United States	Record low maximum temperature	13.3 C (55.9 F)	45 of 100 (Notable)
Cheraw	United States	Record low maximum temperature	16.1 C (61.0 F)	45 of 100 (Notable)
Darlington	United States	Record low maximum temperature	17.2 C (63.0 F)	45 of 100 (Notable)
Marion	United States	Record low maximum temperature	17.2 C (63.0 F)	45 of 100 (Notable)
Salem AP (McNary Field)	United States	Record high minimum temperature	16.7 C (62.1 F)	45 of 100 (Notable)
Ponce 4 E	Puerto Rico [United States]	Record low minimum temperature	19.4 C (66.9 F)	44 of 100 (Notable)
Vase_D	Sweden	Record daily precipitation	45.6 mm (1.8 in)	43 of 100 (Notable)
Hogboda	Sweden	Record daily precipitation	35.6 mm (1.4 in)	43 of 100 (Notable)
Mt Airy 2 W	United States	Record low maximum temperature	16.7 C (62.1 F)	43 of 100 (Notable)
Kiefersfelden-Gach	Germany	Record daily precipitation	34.0 mm (1.3 in)	42 of 100 (Notable)
Backefors	Sweden	Record daily precipitation	35.7 mm (1.4 in)	42 of 100 (Notable)
1 ENE Fairfield	United States	Record daily precipitation	48.3 mm (1.9 in)	42 of 100 (Notable)
Eldon	United States	Record low maximum temperature	14.4 C (57.9 F)	42 of 100 (Notable)
Torrevieja	Spain	Record high maximum temperature	34.3 C (93.7 F)	41 of 100 (Notable)
Sorbytorp	Sweden	Record daily precipitation	54.4 mm (2.1 in)	41 of 100 (Notable)
Denison	United States	Record low maximum temperature	11.1 C (52.0 F)	41 of 100 (Notable)
Burr Oak 4S	United States	Record low maximum temperature	16.1 C (61.0 F)	41 of 100 (Notable)
Chapman	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Solomons	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)

Counts by Type and Timescale

1,050 records

Records set or tied on 18 September 2011 by type: Highest daily maximum 230, Lowest daily maximum 260, Highest daily minimum 123, Lowest daily minimum 77, Heaviest daily rainfall 360.

Records on 18 September 2011 by type
Record type	Records
Highest daily maximum	230
Lowest daily maximum	260
Highest daily minimum	123
Lowest daily minimum	77
Heaviest daily rainfall	360
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 2011 by timescale: all-time 0, monthly 15, daily 1,035.

How Much Records Were Beaten By

867 broken records

Margins by which the 867 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 100.8. Ties are not counted.

Top 20 by Significance

18 September 2011

Top 20 records on 18 September 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 2011	Nora_D, SE	daily rain	40.8 mm (1.6 in)	22.5 mm (0.9 in)	94 years	76 of 100 (Major)
18 September 2011	Flahult, SE	daily rain	36.7 mm (1.4 in)	25.2 mm (1.0 in)	61 years	68 of 100 (Major)
18 September 2011	Skillingaryd, SE	daily rain	37.0 mm (1.5 in)	27.0 mm (1.1 in)	61 years	64 of 100 (Major)
18 September 2011	Huskvarna, SE	daily rain	29.4 mm (1.2 in)	19.7 mm (0.8 in)	61 years	62 of 100 (Major)
18 September 2011	Kavsjo_D, SE	daily rain	26.9 mm (1.1 in)	18.5 mm (0.7 in)	61 years	55 of 100 (Notable)
18 September 2011	Skovde, SE	daily rain	32.2 mm (1.3 in)	19.4 mm (0.8 in)	65 years	55 of 100 (Notable)
18 September 2011	Hedal I Valdres II, NO	daily rain	43.0 mm (1.7 in)	35.4 mm (1.4 in)	36 years	54 of 100 (Notable)
18 September 2011	Visingso, SE	daily rain	25.0 mm (1.0 in)	19.7 mm (0.8 in)	40 years	53 of 100 (Notable)
18 September 2011	Aldervale, AU	daily rain	25.2 mm (1.0 in)	7.9 mm (0.31 in)	96 years	52 of 100 (Notable)
18 September 2011	Mittenwald-Buckelwiesen, DE	daily rain	53.6 mm (2.1 in)	28.8 mm (1.1 in)	45 years	52 of 100 (Notable)
18 September 2011	Hiasen I Sigdal, NO	daily rain	38.5 mm (1.5 in)	14.3 mm (0.6 in)	88 years	52 of 100 (Notable)
18 September 2011	Melsom, NO	daily rain	54.7 mm (2.2 in)	30.5 mm (1.2 in)	45 years	52 of 100 (Notable)
18 September 2011	Saffle, SE	daily rain	46.5 mm (1.8 in)	33.5 mm (1.3 in)	20 years	52 of 100 (Notable)
18 September 2011	Hillsboro, US	daily rain	108.2 mm (4.3 in)	80.0 mm (3.1 in)	20 years	52 of 100 (Notable)
18 September 2011	Doberlug-Kirchhain, DE	daily rain	30.9 mm (1.2 in)	11.0 mm (0.4 in)	78 years	51 of 100 (Notable)
18 September 2011	Motala, SE	daily rain	26.7 mm (1.1 in)	16.1 mm (0.6 in)	60 years	51 of 100 (Notable)
18 September 2011	Mariestad, SE	daily rain	39.7 mm (1.6 in)	36.2 mm (1.4 in)	20 years	51 of 100 (Notable)
18 September 2011	Lead Hill, US	daily rain	68.3 mm (2.7 in)	43.4 mm (1.7 in)	61 years	51 of 100 (Notable)
18 September 2011	Omaha, US	daily rain	127.5 mm (5.0 in)	100.8 mm (4.0 in)	20 years	51 of 100 (Notable)
18 September 2011	Fagre, SE	daily rain	38.0 mm (1.5 in)	33.6 mm (1.3 in)	20 years	50 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 2011

Records set or tied on this calendar date in each year from 1803 to 2011. 2011 had 1,050 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 2011-09-18: 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 20	831
20 to 40	27
40 to 60	4
60 to 80	3
80 to 100	1
100 to 120	1