Weather Records on 12 September 1940

891 weather records were set or tied worldwide on 12 September 1940. Highest significance: Neidavasal, IN.

Key Facts for 12 September 1940

On 12 September 1940, 891 weather records were set or tied at long-record stations worldwide.
127 were record highs and 649 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 881 daily.
Neidavasal set a daily record precipitation of 67.6 mm (2.7 in) on 12 September 1940.
Across 164 earlier years (1793 to 2026) the same calendar date averaged 410 records.

Record Map

891 stations

891 station records on 12 September 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 September 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Neidavasal	India	Record daily precipitation	67.6 mm (2.7 in)	43 of 100 (Notable)
Fort William	Australia	Record daily precipitation	41.4 mm (1.6 in)	42 of 100 (Notable)
Viralimalai	India	Record daily precipitation	62.2 mm (2.4 in)	41 of 100 (Notable)
Udayalipatti	India	Record daily precipitation	88.9 mm (3.5 in)	40 of 100 (Notable)
Panruti	India	Record daily precipitation	104.1 mm (4.1 in)	37 of 100 (Notable)
Tolmie (Langley)	Australia	Record daily precipitation	27.4 mm (1.1 in)	35 of 100 (Notable)
Digby	Canada	Record daily precipitation	34.0 mm (1.3 in)	35 of 100 (Notable)
American Falls 6 NE	United States	Record daily precipitation	25.9 mm (1.0 in)	35 of 100 (Notable)
Annur	India	Record daily precipitation	61.7 mm (2.4 in)	34 of 100 (Routine)
Mettupalayam	India	Record daily precipitation	42.7 mm (1.7 in)	33 of 100 (Routine)
Vedaranayam	India	Record daily precipitation	95.3 mm (3.8 in)	33 of 100 (Routine)
Manapparai	India	Record daily precipitation	59.4 mm (2.3 in)	33 of 100 (Routine)
Strydenberg (Pol)	South Africa	Record daily precipitation	30.5 mm (1.2 in)	33 of 100 (Routine)
College STN 6 SW	United States	Record low minimum temperature	10.0 C (50.0 F)	33 of 100 (Routine)
Prattville	United States	Record low minimum temperature	6.7 C (44.1 F)	32 of 100 (Routine)
Union Springs 9 S	United States	Record low minimum temperature	7.2 C (45.0 F)	32 of 100 (Routine)
Conconully	United States	Record high minimum temperature	15.0 C (59.0 F)	32 of 100 (Routine)
Groenfontein "Montagu"	South Africa	Record daily precipitation	31.8 mm (1.3 in)	31 of 100 (Routine)
Reserve	United States	Record low minimum temperature	10.0 C (50.0 F)	31 of 100 (Routine)
Biloxi	United States	Record low minimum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Vallam	India	Record daily precipitation	64.0 mm (2.5 in)	30 of 100 (Routine)
Ozark 6 NNW	United States	Record low minimum temperature	8.3 C (46.9 F)	30 of 100 (Routine)
Bay Saint Louis	United States	Record low minimum temperature	12.2 C (54.0 F)	30 of 100 (Routine)
Laurel	United States	Record low minimum temperature	7.2 C (45.0 F)	30 of 100 (Routine)
Childers	Australia	Record daily precipitation	42.2 mm (1.7 in)	29 of 100 (Routine)
Tiruvallur	India	Record daily precipitation	71.1 mm (2.8 in)	29 of 100 (Routine)
Tuscaloosa Oliver Dam	United States	Record low minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
Wetumpka	United States	Record low minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
Amite	United States	Record low minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
Magnolia	United States	Record low minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
Mc Minnville	United States	Record low maximum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Flatonia 4SE	United States	Record low minimum temperature	10.6 C (51.1 F)	29 of 100 (Routine)
Olekminsk	Russia	Record low minimum temperature	-5.4 C (22.3 F)	28 of 100 (Routine)
Brookhaven City	United States	Record low minimum temperature	5.6 C (42.1 F)	28 of 100 (Routine)
Columbia Falls 5 SW	United States	Record high minimum temperature	15.6 C (60.1 F)	28 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record low maximum temperature	15.0 C (59.0 F)	28 of 100 (Routine)
Cooma	Australia	Record daily precipitation	26.9 mm (1.1 in)	27 of 100 (Routine)
Goderich	Canada	Record low maximum temperature	14.4 C (57.9 F)	27 of 100 (Routine)
Camp Hill 2NW	United States	Record low minimum temperature	7.2 C (45.0 F)	27 of 100 (Routine)
Lincoln Lock 4	United States	Record low minimum temperature	6.1 C (43.0 F)	27 of 100 (Routine)
Montgomery Wb City	United States	Record low minimum temperature	11.1 C (52.0 F)	27 of 100 (Routine)
Troy	United States	Record low minimum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Blakely	United States	Record low minimum temperature	7.8 C (46.0 F)	27 of 100 (Routine)
Houma	United States	Record low minimum temperature	10.6 C (51.1 F)	27 of 100 (Routine)
Woodville 4 ESE	United States	Record low minimum temperature	7.8 C (46.0 F)	27 of 100 (Routine)
Waynesville 1 E	United States	Record low maximum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Dialville 2 W	United States	Record low minimum temperature	6.7 C (44.1 F)	27 of 100 (Routine)
Springfield	United States	Record low minimum temperature	2.2 C (36.0 F)	27 of 100 (Routine)
Welland	Canada	Record low maximum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
Woodstock	Canada	Record low maximum temperature	13.3 C (55.9 F)	26 of 100 (Routine)
De Funiak Springs 1 E	United States	Record low minimum temperature	10.0 C (50.0 F)	26 of 100 (Routine)
Covington 8 WNW	United States	Record low minimum temperature	10.0 C (50.0 F)	26 of 100 (Routine)
Donaldsonville 4 SW	United States	Record low minimum temperature	11.7 C (53.1 F)	26 of 100 (Routine)
Plain Dealing	United States	Record low minimum temperature	6.1 C (43.0 F)	26 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	13.3 C (55.9 F)	25 of 100 (Routine)
Tirupoondi	India	Record daily precipitation	36.3 mm (1.4 in)	25 of 100 (Routine)
Lalgudi	India	Record daily precipitation	39.9 mm (1.6 in)	25 of 100 (Routine)
Selma	United States	Record low minimum temperature	8.3 C (46.9 F)	25 of 100 (Routine)
Thomasville 7 NE	United States	Record low minimum temperature	11.1 C (52.0 F)	25 of 100 (Routine)
Cheneyville 1 NE	United States	Record low minimum temperature	7.2 C (45.0 F)	25 of 100 (Routine)

Counts by Type and Timescale

891 records

Records set or tied on 12 September 1940 by type: Highest daily maximum 18, Lowest daily maximum 233, Highest daily minimum 109, Lowest daily minimum 416, Heaviest daily rainfall 115.

Records on 12 September 1940 by type
Record type	Records
Highest daily maximum	18
Lowest daily maximum	233
Highest daily minimum	109
Lowest daily minimum	416
Heaviest daily rainfall	115
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 September 1940 by timescale: all-time 0, monthly 10, daily 881.

How Much Records Were Beaten By

750 broken records

Margins by which the 750 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 55.3. Ties are not counted.

Top 20 by Significance

12 September 1940

Top 20 records on 12 September 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 September 1940	Neidavasal, IN	daily rain	67.6 mm (2.7 in)	50.3 mm (2.0 in)	26 years	43 of 100 (Notable)
12 September 1940	Fort William, AU	daily rain	41.4 mm (1.6 in)	32.3 mm (1.3 in)	9 years	42 of 100 (Notable)
12 September 1940	Viralimalai, IN	daily rain	62.2 mm (2.4 in)	50.5 mm (2.0 in)	38 years	41 of 100 (Notable)
12 September 1940	Udayalipatti, IN	daily rain	88.9 mm (3.5 in)	43.9 mm (1.7 in)	37 years	40 of 100 (Notable)
12 September 1940	Panruti, IN	daily rain	104.1 mm (4.1 in)	55.3 mm (2.2 in)	23 years	37 of 100 (Notable)
12 September 1940	Tolmie (Langley), AU	daily rain	27.4 mm (1.1 in)	16.0 mm (0.6 in)	46 years	35 of 100 (Notable)
12 September 1940	Digby, CA	daily rain	34.0 mm (1.3 in)	28.9 mm (1.1 in)	43 years	35 of 100 (Notable)
12 September 1940	American Falls 6 NE, US	daily rain	25.9 mm (1.0 in)	20.1 mm (0.8 in)	1 year	35 of 100 (Notable)
12 September 1940	Annur, IN	daily rain	61.7 mm (2.4 in)	38.8 mm (1.5 in)	14 years	34 of 100 (Routine)
12 September 1940	Mettupalayam, IN	daily rain	42.7 mm (1.7 in)	35.1 mm (1.4 in)	19 years	33 of 100 (Routine)
12 September 1940	Vedaranayam, IN	monthly rain	95.3 mm (3.8 in)	13.8 mm (0.5 in)	37 years	33 of 100 (Routine)
12 September 1940	Manapparai, IN	daily rain	59.4 mm (2.3 in)	37.8 mm (1.5 in)	39 years	33 of 100 (Routine)
12 September 1940	Strydenberg (Pol), ZA	daily rain	30.5 mm (1.2 in)	23.1 mm (0.9 in)	24 years	33 of 100 (Routine)
12 September 1940	College STN 6 SW, US	daily low min	10.0 C (50.0 F)	5.0 C (9.0 F)	47 years	33 of 100 (Routine)
12 September 1940	Prattville, US	daily low min	6.7 C (44.1 F)	6.6 C (11.9 F)	38 years	32 of 100 (Routine)
12 September 1940	Union Springs 9 S, US	daily low min	7.2 C (45.0 F)	7.2 C (13.0 F)	22 years	32 of 100 (Routine)
12 September 1940	Conconully, US	daily high min	15.0 C (59.0 F)	5.6 C (10.1 F)	40 years	32 of 100 (Routine)
12 September 1940	Groenfontein "Montagu", ZA	daily rain	31.8 mm (1.3 in)	24.9 mm (1.0 in)	35 years	31 of 100 (Routine)
12 September 1940	Reserve, US	daily low min	10.0 C (50.0 F)	5.6 C (10.1 F)	33 years	31 of 100 (Routine)
12 September 1940	Biloxi, US	daily low min	11.7 C (53.1 F)	5.0 C (9.0 F)	40 years	31 of 100 (Routine)

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 1940

Records set or tied on this calendar date in each year from 1793 to 1940. 1940 had 891 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 1940-09-12: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	712
10 to 20	20
20 to 30	10
30 to 40	4
40 to 50	1
50 to 60	3