Weather Records on 20 September 2011

650 weather records were set or tied worldwide on 20 September 2011. Highest significance: Butte 5SE, US.

Key Facts for 20 September 2011

On 20 September 2011, 650 weather records were set or tied at long-record stations worldwide.
288 were record highs and 169 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 22 monthly and 628 daily.
Butte 5SE set a daily record precipitation of 81.3 mm (3.2 in) on 20 September 2011.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 441 records.

Record Map

650 stations

650 station records on 20 September 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Butte 5SE	United States	Record daily precipitation	81.3 mm (3.2 in)	72 of 100 (Major)
Tioga 1E	United States	Record daily precipitation	43.2 mm (1.7 in)	67 of 100 (Major)
Birmingham AP	United States	Record daily precipitation	88.6 mm (3.5 in)	62 of 100 (Major)
Agalega	Mauritius	Record daily precipitation	61.0 mm (2.4 in)	57 of 100 (Notable)
Uwajima	Japan	Record daily precipitation	190.0 mm (7.5 in)	56 of 100 (Notable)
Shinjo	Japan	Record daily precipitation	70.9 mm (2.8 in)	54 of 100 (Notable)
Overtornea	Sweden	Record daily precipitation	28.2 mm (1.1 in)	54 of 100 (Notable)
Miyakonojo	Japan	Record daily precipitation	232.9 mm (9.2 in)	53 of 100 (Notable)
Cando 1E	United States	Record daily precipitation	30.5 mm (1.2 in)	52 of 100 (Notable)
Pinson	United States	Record daily precipitation	99.1 mm (3.9 in)	51 of 100 (Notable)
Boddington Shire	Australia	Record daily precipitation	39.0 mm (1.5 in)	50 of 100 (Notable)
Talljarv_D	Sweden	Record daily precipitation	34.8 mm (1.4 in)	50 of 100 (Notable)
Keene 3S	United States	Record daily precipitation	46.5 mm (1.8 in)	49 of 100 (Notable)
Karralea	Australia	Record daily precipitation	86.0 mm (3.4 in)	46 of 100 (Notable)
Mishima	Japan	Record daily precipitation	134.9 mm (5.3 in)	46 of 100 (Notable)
Alexander 4 NNW	United States	Record daily precipitation	27.2 mm (1.1 in)	46 of 100 (Notable)
Oita	Japan	Record daily precipitation	131.1 mm (5.2 in)	45 of 100 (Notable)
Kagoshima	Japan	Record daily precipitation	144.5 mm (5.7 in)	45 of 100 (Notable)
Ft Grant	United States	Record high minimum temperature	21.7 C (71.1 F)	45 of 100 (Notable)
Wedderburn (Post Office)	Australia	Record daily precipitation	27.0 mm (1.1 in)	44 of 100 (Notable)
Nobeoka	Japan	Record daily precipitation	173.0 mm (6.8 in)	44 of 100 (Notable)
Tagus	United States	Record daily precipitation	27.7 mm (1.1 in)	44 of 100 (Notable)
Little Port Walter	United States	Record daily precipitation	247.1 mm (9.7 in)	44 of 100 (Notable)
El Burrero	Mexico	Record daily precipitation	101.6 mm (4.0 in)	43 of 100 (Notable)
Leakesville 6 WSW	United States	Record daily precipitation	112.0 mm (4.4 in)	42 of 100 (Notable)
Minot Exp STN	United States	Record daily precipitation	33.8 mm (1.3 in)	42 of 100 (Notable)
Wajima	Japan	Record daily precipitation	131.8 mm (5.2 in)	41 of 100 (Notable)
Sumoto	Japan	Record daily precipitation	302.0 mm (11.9 in)	41 of 100 (Notable)
Tokushima	Japan	Record daily precipitation	138.9 mm (5.5 in)	41 of 100 (Notable)
Kobe	Japan	Record daily precipitation	79.0 mm (3.1 in)	40 of 100 (Notable)
Ameca	Mexico	Record low maximum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Skagway	United States	Record daily precipitation	33.8 mm (1.3 in)	40 of 100 (Notable)
Westby	United States	Record daily precipitation	27.9 mm (1.1 in)	39 of 100 (Notable)
Crosby	United States	Record daily precipitation	31.2 mm (1.2 in)	39 of 100 (Notable)
Fessenden	United States	Record daily precipitation	48.3 mm (1.9 in)	39 of 100 (Notable)
Towner 2 NE	United States	Record daily precipitation	38.1 mm (1.5 in)	39 of 100 (Notable)
Kochi	Japan	Record daily precipitation	183.9 mm (7.2 in)	38 of 100 (Notable)
Drobeta Turnu Severin	Romania	Record high minimum temperature	19.6 C (67.3 F)	38 of 100 (Notable)
Mc Clusky	United States	Record daily precipitation	44.5 mm (1.8 in)	38 of 100 (Notable)
Suwa	Japan	Record daily precipitation	104.1 mm (4.1 in)	37 of 100 (Notable)
Himeji	Japan	Record daily precipitation	85.1 mm (3.4 in)	37 of 100 (Notable)
Holly Springs 4 N	United States	Record daily precipitation	82.3 mm (3.2 in)	37 of 100 (Notable)
Fortuna 1 W	United States	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Waynesboro	United States	Record daily precipitation	70.4 mm (2.8 in)	37 of 100 (Notable)
Ketchikan AP	United States	Record daily precipitation	127.0 mm (5.0 in)	37 of 100 (Notable)
Takayama	Japan	Record daily precipitation	82.0 mm (3.2 in)	36 of 100 (Notable)
Zaragoza (Smn)	Mexico	Record high maximum temperature	41.7 C (107.1 F)	36 of 100 (Notable)
Ponce 4 E	Puerto Rico [United States]	Record low minimum temperature	19.4 C (66.9 F)	36 of 100 (Notable)
Moskalvo	Russia	Record daily precipitation	29.1 mm (1.1 in)	36 of 100 (Notable)
Buckatunna 1 NE	United States	Record daily precipitation	75.4 mm (3.0 in)	35 of 100 (Notable)
Wildrose 3NW	United States	Record daily precipitation	33.0 mm (1.3 in)	35 of 100 (Notable)
Akita	Japan	Record low maximum temperature	15.5 C (59.9 F)	34 of 100 (Routine)
Benito Juarez	Mexico	Record daily precipitation	131.8 mm (5.2 in)	34 of 100 (Routine)
Harvey 4NE	United States	Record daily precipitation	31.0 mm (1.2 in)	34 of 100 (Routine)
Santa Maria Ecatepec	Mexico	Record high maximum temperature	28.9 C (84.0 F)	33 of 100 (Routine)
Verhneimbatsk	Russia	Record high maximum temperature	24.1 C (75.4 F)	33 of 100 (Routine)
Matsumoto	Japan	Record daily precipitation	104.9 mm (4.1 in)	32 of 100 (Routine)
Hamada	Japan	Record daily precipitation	73.9 mm (2.9 in)	32 of 100 (Routine)
Tura	Russia	Record high maximum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Newman	United States	Record high maximum temperature	38.9 C (102.0 F)	32 of 100 (Routine)

Counts by Type and Timescale

650 records

Records set or tied on 20 September 2011 by type: Highest daily maximum 168, Lowest daily maximum 92, Highest daily minimum 120, Lowest daily minimum 77, Heaviest daily rainfall 193.

Records on 20 September 2011 by type
Record type	Records
Highest daily maximum	168
Lowest daily maximum	92
Highest daily minimum	120
Lowest daily minimum	77
Heaviest daily rainfall	193
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 2011 by timescale: all-time 0, monthly 22, daily 628.

How Much Records Were Beaten By

475 broken records

Margins by which the 475 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 171.5. Ties are not counted.

Top 20 by Significance

20 September 2011

Top 20 records on 20 September 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 2011	Butte 5SE, US	daily rain	81.3 mm (3.2 in)	51.1 mm (2.0 in)	80 years	72 of 100 (Major)
20 September 2011	Tioga 1E, US	daily rain	43.2 mm (1.7 in)	33.0 mm (1.3 in)	58 years	67 of 100 (Major)
20 September 2011	Birmingham AP, US	daily rain	88.6 mm (3.5 in)	58.6 mm (2.3 in)	78 years	62 of 100 (Major)
20 September 2011	Agalega, MU	daily rain	61.0 mm (2.4 in)	48.4 mm (1.9 in)	40 years	57 of 100 (Notable)
20 September 2011	Uwajima, JP	daily rain	190.0 mm (7.5 in)	171.5 mm (6.8 in)	34 years	56 of 100 (Notable)
20 September 2011	Shinjo, JP	daily rain	70.9 mm (2.8 in)	47.9 mm (1.9 in)	37 years	54 of 100 (Notable)
20 September 2011	Overtornea, SE	daily rain	28.2 mm (1.1 in)	20.4 mm (0.8 in)	25 years	54 of 100 (Notable)
20 September 2011	Miyakonojo, JP	daily rain	232.9 mm (9.2 in)	157.4 mm (6.2 in)	24 years	53 of 100 (Notable)
20 September 2011	Cando 1E, US	daily rain	30.5 mm (1.2 in)	12.2 mm (0.5 in)	98 years	52 of 100 (Notable)
20 September 2011	Pinson, US	daily rain	99.1 mm (3.9 in)	68.9 mm (2.7 in)	28 years	51 of 100 (Notable)
20 September 2011	Boddington Shire, AU	daily rain	39.0 mm (1.5 in)	25.0 mm (1.0 in)	8 years	50 of 100 (Notable)
20 September 2011	Talljarv_D, SE	daily rain	34.8 mm (1.4 in)	26.6 mm (1.0 in)	20 years	50 of 100 (Notable)
20 September 2011	Keene 3S, US	daily rain	46.5 mm (1.8 in)	32.0 mm (1.3 in)	14 years	49 of 100 (Notable)
20 September 2011	Karralea, AU	monthly rain	86.0 mm (3.4 in)	23.6 mm (0.9 in)	5 years	46 of 100 (Notable)
20 September 2011	Mishima, JP	daily rain	134.9 mm (5.3 in)	95.4 mm (3.8 in)	21 years	46 of 100 (Notable)
20 September 2011	Alexander 4 NNW, US	daily rain	27.2 mm (1.1 in)	22.1 mm (0.9 in)	20 years	46 of 100 (Notable)
20 September 2011	Oita, JP	daily rain	131.1 mm (5.2 in)	114.1 mm (4.5 in)	24 years	45 of 100 (Notable)
20 September 2011	Kagoshima, JP	daily rain	144.5 mm (5.7 in)	86.0 mm (3.4 in)	22 years	45 of 100 (Notable)
20 September 2011	Ft Grant, US	daily high min	21.7 C (71.1 F)	1.7 C (3.1 F)	108 years	45 of 100 (Notable)
20 September 2011	Wedderburn (Post Office), AU	daily rain	27.0 mm (1.1 in)	5.2 mm (0.20 in)	96 years	44 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

1812 to 2011

Records set or tied on this calendar date in each year from 1812 to 2011. 2011 had 650 records.

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

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 2011-09-20: 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 25	432
25 to 50	27
50 to 75	7
75 to 100	3
100 to 125	3
125 to 150	1
150 to 175	2