Weather Records on 12 September 2020

566 weather records were set or tied worldwide on 12 September 2020. Highest significance: Key W Intl AP, US.

Key Facts for 12 September 2020

On 12 September 2020, 566 weather records were set or tied at long-record stations worldwide.
280 were record highs and 175 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 12 monthly and 553 daily.
Key W Intl AP set a monthly record daily precipitation of 238.0 mm (9.4 in) on 12 September 2020.
Across 164 earlier years (1793 to 2026) the same calendar date averaged 412 records.

Record Map

566 stations

566 station records on 12 September 2020 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 September 2020: highest significance records shown on the map
Station	Country	Type	Value	Significance
Key W Intl AP	United States	Record daily precipitation	238.0 mm (9.4 in)	78 of 100 (Major)
Glenthompson	Australia	Record daily precipitation	40.0 mm (1.6 in)	59 of 100 (Notable)
Hanko Tvarminne	Finland	Record daily precipitation	35.9 mm (1.4 in)	57 of 100 (Notable)
Nagasaki	Japan	Record daily precipitation	198.4 mm (7.8 in)	57 of 100 (Notable)
Flamingo Rs	United States	Record daily precipitation	238.0 mm (9.4 in)	55 of 100 (Notable)
Kauhava Lentokentta	Finland	Record daily precipitation	36.3 mm (1.4 in)	54 of 100 (Notable)
Karvia Alkkia	Finland	Record daily precipitation	35.3 mm (1.4 in)	52 of 100 (Notable)
Makurazaki	Japan	Record daily precipitation	188.0 mm (7.4 in)	52 of 100 (Notable)
Sandy Cape Lighthouse	Australia	Record daily precipitation	34.4 mm (1.4 in)	48 of 100 (Notable)
Bowie	United States	Record low maximum temperature	20.0 C (68.0 F)	47 of 100 (Notable)
Brooklyn	United States	Record daily precipitation	73.7 mm (2.9 in)	46 of 100 (Notable)
Clarksville L&D 24	United States	Record daily precipitation	90.4 mm (3.6 in)	46 of 100 (Notable)
Scotia	United States	Record high minimum temperature	18.9 C (66.0 F)	45 of 100 (Notable)
Grundy Ctr	United States	Record daily precipitation	38.9 mm (1.5 in)	44 of 100 (Notable)
Ochopee Florida	United States	Record low minimum temperature	17.8 C (64.0 F)	44 of 100 (Notable)
Key West NAS	United States	Record daily precipitation	168.4 mm (6.6 in)	44 of 100 (Notable)
Augusta	United States	Record daily precipitation	54.6 mm (2.1 in)	43 of 100 (Notable)
Suttsu	Japan	Record daily precipitation	61.0 mm (2.4 in)	42 of 100 (Notable)
Breckenridge	United States	Record low maximum temperature	20.0 C (68.0 F)	42 of 100 (Notable)
Lewisburg 3 N	United States	Record high minimum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Gatum	Australia	Record daily precipitation	28.2 mm (1.1 in)	41 of 100 (Notable)
Tortosa - Observatorio del Ebr	Spain	Record high maximum temperature	35.2 C (95.4 F)	41 of 100 (Notable)
Troy	United States	Record high minimum temperature	23.3 C (73.9 F)	41 of 100 (Notable)
Glen St Mary 1 W	United States	Record low minimum temperature	11.7 C (53.1 F)	41 of 100 (Notable)
Avon	United States	Record daily precipitation	51.8 mm (2.0 in)	41 of 100 (Notable)
Fayette	United States	Record daily precipitation	41.9 mm (1.6 in)	41 of 100 (Notable)
Clemson UNIV	United States	Record high minimum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Rockwell City	United States	Record low maximum temperature	11.7 C (53.1 F)	40 of 100 (Notable)
Toledo 3N	United States	Record daily precipitation	52.3 mm (2.1 in)	40 of 100 (Notable)
Winfield 3NE	United States	Record low maximum temperature	18.9 C (66.0 F)	40 of 100 (Notable)
Steffenville	United States	Record daily precipitation	69.9 mm (2.8 in)	40 of 100 (Notable)
Bentley	United States	Record daily precipitation	62.5 mm (2.5 in)	39 of 100 (Notable)
Gladstone L/D 18	United States	Record daily precipitation	46.2 mm (1.8 in)	38 of 100 (Notable)
Calhoun City	United States	Record high minimum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Hachita 1W	United States	Record low minimum temperature	7.8 C (46.0 F)	38 of 100 (Notable)
Clatskanie	United States	Record low maximum temperature	14.4 C (57.9 F)	38 of 100 (Notable)
Canton	United States	Record daily precipitation	68.8 mm (2.7 in)	37 of 100 (Notable)
Quicksand	United States	Record high minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Roscoe	United States	Record low maximum temperature	17.2 C (63.0 F)	37 of 100 (Notable)
Ft Ross	United States	Record low minimum temperature	1.1 C (34.0 F)	36 of 100 (Notable)
Avon	United States	Record low maximum temperature	14.4 C (57.9 F)	36 of 100 (Notable)
Tidal River	Australia	Record daily precipitation	26.0 mm (1.0 in)	35 of 100 (Notable)
Canton L&D 20	United States	Record daily precipitation	53.1 mm (2.1 in)	35 of 100 (Notable)
Carrizo Springs 3S	United States	Record low maximum temperature	26.1 C (79.0 F)	35 of 100 (Notable)
Urangan Hibiscus St	Australia	Record daily precipitation	42.0 mm (1.7 in)	34 of 100 (Routine)
Smola - Moldstad	Norway	Record daily precipitation	28.1 mm (1.1 in)	34 of 100 (Routine)
Gmo Im.E.K.Fedorova	Russia	Record high maximum temperature	9.2 C (48.6 F)	34 of 100 (Routine)
Hartwell	United States	Record high minimum temperature	22.8 C (73.0 F)	34 of 100 (Routine)
Clutier	United States	Record daily precipitation	51.1 mm (2.0 in)	34 of 100 (Routine)
Rushville	United States	Record daily precipitation	39.1 mm (1.5 in)	33 of 100 (Routine)
Isparta	Turkey	Record high minimum temperature	16.5 C (61.7 F)	32 of 100 (Routine)
Aledo	United States	Record daily precipitation	38.9 mm (1.5 in)	32 of 100 (Routine)
Manchester #2	United States	Record daily precipitation	49.0 mm (1.9 in)	32 of 100 (Routine)
Seattle Boeing Fld	United States	Record low maximum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
King Salmon	United States	Record low minimum temperature	-4.9 C (23.2 F)	32 of 100 (Routine)
Malin Head	Ireland	Record daily precipitation	33.4 mm (1.3 in)	31 of 100 (Routine)
Montpellier-Aeroport	France	Record high maximum temperature	33.1 C (91.6 F)	31 of 100 (Routine)
Culman	Russia	Record high maximum temperature	25.3 C (77.5 F)	31 of 100 (Routine)
Nagornyj	Russia	Record high maximum temperature	24.2 C (75.6 F)	31 of 100 (Routine)
Bushnell 1 E	United States	Record high minimum temperature	24.4 C (75.9 F)	31 of 100 (Routine)

Counts by Type and Timescale

566 records

Records set or tied on 12 September 2020 by type: Highest daily maximum 71, Lowest daily maximum 104, Highest daily minimum 209, Lowest daily minimum 71, Heaviest daily rainfall 111.

Records on 12 September 2020 by type
Record type	Records
Highest daily maximum	71
Lowest daily maximum	104
Highest daily minimum	209
Lowest daily minimum	71
Heaviest daily rainfall	111
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 September 2020 by timescale: all-time 1, monthly 12, daily 553.

How Much Records Were Beaten By

429 broken records

Margins by which the 429 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 101.4. Ties are not counted.

Top 20 by Significance

12 September 2020

Top 20 records on 12 September 2020 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 September 2020	Key W Intl AP, US	monthly rain	238.0 mm (9.4 in)	84.1 mm (3.3 in)	71 years	78 of 100 (Major)
12 September 2020	Glenthompson, AU	daily rain	40.0 mm (1.6 in)	27.3 mm (1.1 in)	47 years	59 of 100 (Notable)
12 September 2020	Hanko Tvarminne, FI	daily rain	35.9 mm (1.4 in)	22.9 mm (0.9 in)	43 years	57 of 100 (Notable)
12 September 2020	Nagasaki, JP	daily rain	198.4 mm (7.8 in)	101.4 mm (4.0 in)	44 years	57 of 100 (Notable)
12 September 2020	Flamingo Rs, US	all-time rain	238.0 mm (9.4 in)	29.7 mm (1.2 in)	39 years	55 of 100 (Notable)
12 September 2020	Kauhava Lentokentta, FI	daily rain	36.3 mm (1.4 in)	17.2 mm (0.7 in)	51 years	54 of 100 (Notable)
12 September 2020	Karvia Alkkia, FI	daily rain	35.3 mm (1.4 in)	21.7 mm (0.9 in)	32 years	52 of 100 (Notable)
12 September 2020	Makurazaki, JP	daily rain	188.0 mm (7.4 in)	101.0 mm (4.0 in)	44 years	52 of 100 (Notable)
12 September 2020	Sandy Cape Lighthouse, AU	daily rain	34.4 mm (1.4 in)	10.3 mm (0.4 in)	105 years	48 of 100 (Notable)
12 September 2020	Bowie, US	daily low max	20.0 C (68.0 F)	3.3 C (5.9 F)	118 years	47 of 100 (Notable)
12 September 2020	Brooklyn, US	daily rain	73.7 mm (2.9 in)	64.6 mm (2.5 in)	17 years	46 of 100 (Notable)
12 September 2020	Clarksville L&D 24, US	daily rain	90.4 mm (3.6 in)	30.5 mm (1.2 in)	71 years	46 of 100 (Notable)
12 September 2020	Scotia, US	daily high min	18.9 C (66.0 F)	2.8 C (5.0 F)	80 years	45 of 100 (Notable)
12 September 2020	Grundy Ctr, US	daily rain	38.9 mm (1.5 in)	5.9 mm (0.23 in)	114 years	44 of 100 (Notable)
12 September 2020	Ochopee Florida, US	daily low min	17.8 C (64.0 F)	4.4 C (7.9 F)	24 years	44 of 100 (Notable)
12 September 2020	Key West NAS, US	monthly rain	168.4 mm (6.6 in)	29.5 mm (1.2 in)	34 years	44 of 100 (Notable)
12 September 2020	Augusta, US	daily rain	54.6 mm (2.1 in)	23.6 mm (0.9 in)	71 years	43 of 100 (Notable)
12 September 2020	Suttsu, JP	daily rain	61.0 mm (2.4 in)	27.4 mm (1.1 in)	63 years	42 of 100 (Notable)
12 September 2020	Breckenridge, US	daily low max	20.0 C (68.0 F)	2.2 C (4.0 F)	95 years	42 of 100 (Notable)
12 September 2020	Lewisburg 3 N, US	daily high min	18.9 C (66.0 F)	1.1 C (2.0 F)	109 years	42 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

1793 to 2020

Records set or tied on this calendar date in each year from 1793 to 2020. 2020 had 566 records.

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

Records on 09-12 in each year
Year	Records
1793	2
1809	1
1813	1
1814	2
1834	1
1837	2
1839	1
1847	1
1848	1
1854	4
1859	2
1860	2
1865	2
1866	1
1867	1
1868	2
1869	1
1872	2
1876	1
1878	1
1880	1
1881	1
1882	1
1884	2
1885	2
1886	1
1887	2
1888	2
1889	1
1891	4
1892	1
1893	4
1894	1
1895	5
1896	2
1897	3
1898	3
1899	4
1900	1
1901	5
1902	11
1903	18
1904	7
1905	8
1906	24
1907	11
1908	12
1909	11
1910	4
1911	15
1912	20
1913	12
1914	49
1915	71
1916	21
1917	231
1918	42
1919	69
1920	49
1921	60
1922	136
1923	33
1924	177
1925	443
1926	89
1927	339
1928	155
1929	118
1930	198
1931	648
1932	199
1933	360
1934	176
1935	441
1936	515
1937	318
1938	332
1939	702
1940	891
1941	172
1942	337
1943	544
1944	393
1945	414
1946	302
1947	596
1948	292
1949	512
1950	578
1951	399
1952	575
1953	515
1954	313
1955	457
1956	389
1957	727
1958	783
1959	536
1960	772
1961	750
1962	407
1963	466
1964	836
1965	459
1966	416
1967	510
1968	428
1969	558
1970	619
1971	593
1972	430
1973	588
1974	575
1975	1,102
1976	539
1977	524
1978	952
1979	765
1980	511
1981	424
1982	993
1983	915
1984	700
1985	876
1986	787
1987	686
1988	997
1989	1,313
1990	1,001
1991	672
1992	767
1993	798
1994	550
1995	532
1996	1,014
1997	737
1998	1,770
1999	938
2000	1,188
2001	797
2002	883
2003	830
2004	653
2005	1,032
2006	963
2007	776
2008	1,213
2009	876
2010	939
2011	988
2012	639
2013	1,066
2014	1,374
2015	704
2016	748
2017	1,114
2018	595
2019	884
2020	566
2021	513
2022	739
2023	844
2024	1,009
2025	433
2026	627

Download the Data

Data for records on 2020-09-12: 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	411
20 to 40	14
40 to 60	0
60 to 80	1
80 to 100	1
100 to 120	2