Weather Records on 12 September 1931

648 weather records were set or tied worldwide on 12 September 1931. Highest significance: Oran-Hopital Militaire, DZ.

Key Facts for 12 September 1931

On 12 September 1931, 648 weather records were set or tied at long-record stations worldwide.
501 were record highs and 22 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 50 monthly and 597 daily.
Oran-Hopital Militaire set a daily record precipitation of 43.0 mm (1.7 in) on 12 September 1931.
Across 164 earlier years (1793 to 2026) the same calendar date averaged 412 records.

Record Map

648 stations

648 station records on 12 September 1931 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 September 1931: highest significance records shown on the map
Station	Country	Type	Value	Significance
Oran-Hopital Militaire	Algeria	Record daily precipitation	43.0 mm (1.7 in)	54 of 100 (Notable)
Marlborough Post Office	Australia	Record daily precipitation	31.8 mm (1.3 in)	53 of 100 (Notable)
Uccle	Belgium	Record low maximum temperature	11.5 C (52.7 F)	40 of 100 (Notable)
Sasvad	India	Record daily precipitation	68.6 mm (2.7 in)	39 of 100 (Notable)
Hindupur	India	Record daily precipitation	76.7 mm (3.0 in)	37 of 100 (Notable)
Simcoe	Canada	Record high maximum temperature	35.0 C (95.0 F)	32 of 100 (Routine)
Savanne	Canada	Record high minimum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Southampton	Canada	Record high maximum temperature	33.3 C (91.9 F)	28 of 100 (Routine)
Davangire	India	Record daily precipitation	54.6 mm (2.1 in)	28 of 100 (Routine)
Akola	India	Record daily precipitation	46.2 mm (1.8 in)	28 of 100 (Routine)
Dobikin	Australia	Record daily precipitation	27.2 mm (1.1 in)	27 of 100 (Routine)
Mackinac Island	United States	Record high maximum temperature	31.1 C (88.0 F)	27 of 100 (Routine)
Milwaukee Wb City	United States	Record high minimum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
Haliburton A	Canada	Record high maximum temperature	35.6 C (96.1 F)	26 of 100 (Routine)
Calumet	United States	Record high minimum temperature	20.0 C (68.0 F)	26 of 100 (Routine)
Uralla (Salisbury Court)	Australia	Record daily precipitation	36.8 mm (1.4 in)	25 of 100 (Routine)
Savanne	Canada	Record high maximum temperature	32.2 C (90.0 F)	25 of 100 (Routine)
Pembroke Eddy Match	Canada	Record high maximum temperature	31.1 C (88.0 F)	25 of 100 (Routine)
Barrie	Canada	Record high maximum temperature	32.2 C (90.0 F)	25 of 100 (Routine)
London South	Canada	Record high maximum temperature	35.0 C (95.0 F)	25 of 100 (Routine)
Chickmagalur	India	Record daily precipitation	41.9 mm (1.6 in)	25 of 100 (Routine)
Pacific Heights	Australia	Record daily precipitation	31.0 mm (1.2 in)	24 of 100 (Routine)
Lakefield	Canada	Record high maximum temperature	35.0 C (95.0 F)	24 of 100 (Routine)
Abitibi Post	Canada	Record high maximum temperature	30.6 C (87.1 F)	24 of 100 (Routine)
Lawrenceville 2 S	United States	Record high maximum temperature	36.7 C (98.1 F)	24 of 100 (Routine)
Traverse Cy Cherry Capital AP	United States	Record high minimum temperature	25.6 C (78.1 F)	24 of 100 (Routine)
Biskra	Algeria	Record high maximum temperature	41.0 C (105.8 F)	23 of 100 (Routine)
Yaamba	Australia	Record daily precipitation	31.5 mm (1.2 in)	23 of 100 (Routine)
Uccle	Belgium	Record low minimum temperature	3.0 C (37.4 F)	23 of 100 (Routine)
Bangalore	India	Record daily precipitation	40.6 mm (1.6 in)	23 of 100 (Routine)
Tumkur	India	Record daily precipitation	35.1 mm (1.4 in)	23 of 100 (Routine)
Altoona Horseshoe Curv	United States	Record high maximum temperature	35.0 C (95.0 F)	23 of 100 (Routine)
Pembroke Eddy Match	Canada	Record high minimum temperature	17.8 C (64.0 F)	22 of 100 (Routine)
Beatrice	Canada	Record high maximum temperature	33.9 C (93.0 F)	22 of 100 (Routine)
Sfax El-Maou	Tunisia	Record high minimum temperature	28.0 C (82.4 F)	22 of 100 (Routine)
Calumet	United States	Record high maximum temperature	31.7 C (89.1 F)	22 of 100 (Routine)
Mackinaw City 2	United States	Record high maximum temperature	32.2 C (90.0 F)	22 of 100 (Routine)
Newberry-Luce Co Rd Commission	United States	Record high maximum temperature	31.7 C (89.1 F)	22 of 100 (Routine)
St Ignace	United States	Record high maximum temperature	32.2 C (90.0 F)	22 of 100 (Routine)
Bridgeton 1 NE	United States	Record high maximum temperature	36.7 C (98.1 F)	22 of 100 (Routine)
Lindsay	Canada	Record high maximum temperature	36.1 C (97.0 F)	21 of 100 (Routine)
Cheboygan	United States	Record high maximum temperature	35.0 C (95.0 F)	21 of 100 (Routine)
Sheboygan	United States	Record high maximum temperature	35.0 C (95.0 F)	21 of 100 (Routine)
Escanaba	United States	Record high minimum temperature	20.0 C (68.0 F)	21 of 100 (Routine)
Vilnius	Lithuania	Record daily precipitation	20.9 mm (0.8 in)	20 of 100 (Routine)
St Lawrence Post Office	Australia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Nebo	Australia	Record daily precipitation	2.5 mm (0.10 in)	20 of 100 (Routine)
Cudgegong (Kiora)	Australia	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Stanwell Post Office	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Rutherglen Viticulture College	Australia	Record daily precipitation	9.1 mm (0.36 in)	20 of 100 (Routine)
Chatham 2	Canada	Record high maximum temperature	36.7 C (98.1 F)	20 of 100 (Routine)
Welland	Canada	Record high maximum temperature	33.9 C (93.0 F)	20 of 100 (Routine)
Paris	Canada	Record high maximum temperature	36.1 C (97.0 F)	20 of 100 (Routine)
Bancroft	Canada	Record high minimum temperature	16.1 C (61.0 F)	20 of 100 (Routine)
E Tawas	United States	Record high maximum temperature	34.4 C (93.9 F)	20 of 100 (Routine)
Winona	United States	Record high minimum temperature	23.3 C (73.9 F)	20 of 100 (Routine)
Lock Haven	United States	Record high maximum temperature	37.2 C (99.0 F)	20 of 100 (Routine)
Jim Thorpe	United States	Record high maximum temperature	36.7 C (98.1 F)	20 of 100 (Routine)
Tyndall	United States	Record high maximum temperature	37.8 C (100.0 F)	20 of 100 (Routine)
Wellsburg Wtr Trmt Pl	United States	Record high maximum temperature	35.6 C (96.1 F)	20 of 100 (Routine)

Counts by Type and Timescale

648 records

Records set or tied on 12 September 1931 by type: Highest daily maximum 298, Lowest daily maximum 9, Highest daily minimum 203, Lowest daily minimum 13, Heaviest daily rainfall 125.

Records on 12 September 1931 by type
Record type	Records
Highest daily maximum	298
Lowest daily maximum	9
Highest daily minimum	203
Lowest daily minimum	13
Heaviest daily rainfall	125
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 September 1931 by timescale: all-time 1, monthly 50, daily 597.

How Much Records Were Beaten By

490 broken records

Margins by which the 490 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 59.7. Ties are not counted.

Top 20 by Significance

12 September 1931

Top 20 records on 12 September 1931 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 September 1931	Oran-Hopital Militaire, DZ	daily rain	43.0 mm (1.7 in)	35.9 mm (1.4 in)	20 years	54 of 100 (Notable)
12 September 1931	Marlborough Post Office, AU	daily rain	31.8 mm (1.3 in)	31.8 mm (1.3 in)	55 years	53 of 100 (Notable)
12 September 1931	Uccle, BE	daily low max	11.5 C (52.7 F)	1.4 C (2.5 F)	94 years	40 of 100 (Notable)
12 September 1931	Sasvad, IN	daily rain	68.6 mm (2.7 in)	44.2 mm (1.7 in)	14 years	39 of 100 (Notable)
12 September 1931	Hindupur, IN	daily rain	76.7 mm (3.0 in)	59.7 mm (2.4 in)	13 years	37 of 100 (Notable)
12 September 1931	Simcoe, CA	monthly high max	35.0 C (95.0 F)	0.6 C (1.1 F)	50 years	32 of 100 (Routine)
12 September 1931	Savanne, CA	daily high min	17.8 C (64.0 F)	7.2 C (13.0 F)	37 years	29 of 100 (Routine)
12 September 1931	Southampton, CA	daily high max	33.3 C (91.9 F)	3.3 C (5.9 F)	56 years	28 of 100 (Routine)
12 September 1931	Davangire, IN	daily rain	54.6 mm (2.1 in)	43.2 mm (1.7 in)	4 years	28 of 100 (Routine)
12 September 1931	Akola, IN	daily rain	46.2 mm (1.8 in)	33.5 mm (1.3 in)	14 years	28 of 100 (Routine)
12 September 1931	Dobikin, AU	daily rain	27.2 mm (1.1 in)	17.5 mm (0.7 in)	16 years	27 of 100 (Routine)
12 September 1931	Mackinac Island, US	daily high max	31.1 C (88.0 F)	7.2 C (13.0 F)	28 years	27 of 100 (Routine)
12 September 1931	Milwaukee Wb City, US	daily high min	22.8 C (73.0 F)	2.2 C (4.0 F)	56 years	27 of 100 (Routine)
12 September 1931	Haliburton A, CA	monthly high max	35.6 C (96.1 F)	1.7 C (3.1 F)	31 years	26 of 100 (Routine)
12 September 1931	Calumet, US	daily high min	20.0 C (68.0 F)	5.0 C (9.0 F)	37 years	26 of 100 (Routine)
12 September 1931	Uralla (Salisbury Court), AU	daily rain	36.8 mm (1.4 in)	19.5 mm (0.8 in)	1 year	25 of 100 (Routine)
12 September 1931	Savanne, CA	monthly high max	32.2 C (90.0 F)	0.5 C (0.9 F)	37 years	25 of 100 (Routine)
12 September 1931	Pembroke Eddy Match, CA	daily high max	31.1 C (88.0 F)	1.7 C (3.1 F)	53 years	25 of 100 (Routine)
12 September 1931	Barrie, CA	daily high max	32.2 C (90.0 F)	1.1 C (2.0 F)	57 years	25 of 100 (Routine)
12 September 1931	London South, CA	monthly high max	35.0 C (95.0 F)	0.6 C (1.1 F)	34 years	25 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 1931

Records set or tied on this calendar date in each year from 1793 to 1931. 1931 had 648 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 1931-09-12: 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	462
10 to 20	17
20 to 30	4
30 to 40	4
40 to 50	2
50 to 60	1