Weather Records on 20 September 1931

564 weather records were set or tied worldwide on 20 September 1931. Highest significance: Bakhtiarpur, IN.

Key Facts for 20 September 1931

On 20 September 1931, 564 weather records were set or tied at long-record stations worldwide.
434 were record highs and 25 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 15 monthly and 549 daily.
Bakhtiarpur set a daily record precipitation of 127.0 mm (5.0 in) on 20 September 1931.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 441 records.

Record Map

564 stations

564 station records on 20 September 1931 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1931: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bakhtiarpur	India	Record daily precipitation	127.0 mm (5.0 in)	44 of 100 (Notable)
Darwin Post Office	Australia	Record high minimum temperature	29.0 C (84.2 F)	41 of 100 (Notable)
Johnstown	United States	Record daily precipitation	43.7 mm (1.7 in)	40 of 100 (Notable)
Marshallville 6 S	United States	Record daily precipitation	68.6 mm (2.7 in)	36 of 100 (Notable)
Milledgeville	United States	Record daily precipitation	64.8 mm (2.6 in)	36 of 100 (Notable)
Columbus 3 NE	United States	Record daily precipitation	48.3 mm (1.9 in)	34 of 100 (Routine)
Crow Agency	United States	Record daily precipitation	38.1 mm (1.5 in)	32 of 100 (Routine)
Bihar	India	Record daily precipitation	108.0 mm (4.3 in)	31 of 100 (Routine)
David City 4E	United States	Record daily precipitation	64.0 mm (2.5 in)	31 of 100 (Routine)
Paris	Canada	Record daily precipitation	68.3 mm (2.7 in)	30 of 100 (Routine)
E Tawas	United States	Record daily precipitation	37.6 mm (1.5 in)	30 of 100 (Routine)
Seven Oaks (Bellimbopinni)	Australia	Record daily precipitation	49.5 mm (1.9 in)	29 of 100 (Routine)
Petoskey	United States	Record daily precipitation	70.6 mm (2.8 in)	29 of 100 (Routine)
Brantford	Canada	Record daily precipitation	50.5 mm (2.0 in)	28 of 100 (Routine)
Monticello	United States	Record daily precipitation	50.8 mm (2.0 in)	28 of 100 (Routine)
Begusarai	India	Record daily precipitation	72.6 mm (2.9 in)	27 of 100 (Routine)
Vagra	India	Record daily precipitation	86.4 mm (3.4 in)	27 of 100 (Routine)
Port Arthur	Canada	Record daily precipitation	45.7 mm (1.8 in)	25 of 100 (Routine)
Amchong(Sonepur)	India	Record daily precipitation	78.2 mm (3.1 in)	25 of 100 (Routine)
Saguache	United States	Record low maximum temperature	15.6 C (60.1 F)	25 of 100 (Routine)
Ft Gaines	United States	Record high minimum temperature	26.1 C (79.0 F)	25 of 100 (Routine)
Jacksonville Wb City	United States	Record high minimum temperature	25.6 C (78.1 F)	25 of 100 (Routine)
Woodstock	Canada	Record daily precipitation	48.3 mm (1.9 in)	24 of 100 (Routine)
Macon	United States	Record daily precipitation	48.8 mm (1.9 in)	23 of 100 (Routine)
Decorah	United States	Record daily precipitation	61.0 mm (2.4 in)	23 of 100 (Routine)
Lawrence	United States	Record high maximum temperature	36.1 C (97.0 F)	23 of 100 (Routine)
Willow City	United States	Record daily precipitation	34.3 mm (1.4 in)	23 of 100 (Routine)
Richmond Wtr Wks	United States	Record high minimum temperature	22.2 C (72.0 F)	22 of 100 (Routine)
Welland	Canada	Record daily precipitation	36.1 mm (1.4 in)	21 of 100 (Routine)
Taloda	India	Record daily precipitation	30.5 mm (1.2 in)	21 of 100 (Routine)
Tekamah	United States	Record high minimum temperature	22.8 C (73.0 F)	21 of 100 (Routine)
Poretskoye	Russia	Record daily precipitation	24.3 mm (1.0 in)	20 of 100 (Routine)
Ekalaka	United States	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Brandon Cda	Canada	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Swift Current	Canada	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Southampton	Canada	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Billings Wtp	United States	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Parry Sound	Canada	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Carthage	United States	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Lebo	United States	Record high maximum temperature	36.1 C (97.0 F)	20 of 100 (Routine)
Syracuse	United States	Record high minimum temperature	25.0 C (77.0 F)	20 of 100 (Routine)
Lewisburg Exp STN	United States	Record high minimum temperature	24.4 C (75.9 F)	20 of 100 (Routine)
Lexington Bluegrass AP	United States	Record high minimum temperature	22.8 C (73.0 F)	20 of 100 (Routine)
Calgary Int'l A	Canada	Record daily precipitation	5.1 mm (0.20 in)	19 of 100 (Routine)
Samastipur	India	Record daily precipitation	53.6 mm (2.1 in)	19 of 100 (Routine)
Devrukh	India	Record daily precipitation	96.0 mm (3.8 in)	19 of 100 (Routine)
Osage City	United States	Record high maximum temperature	37.2 C (99.0 F)	19 of 100 (Routine)
Ottawa	United States	Record high maximum temperature	36.1 C (97.0 F)	19 of 100 (Routine)
Salisbury	United States	Record daily precipitation	29.7 mm (1.2 in)	19 of 100 (Routine)
Battleford	Canada	Record daily precipitation	19.3 mm (0.8 in)	18 of 100 (Routine)
Port Dover	Canada	Record daily precipitation	29.2 mm (1.1 in)	18 of 100 (Routine)
Stratford	Canada	Record daily precipitation	34.8 mm (1.4 in)	18 of 100 (Routine)
Dinapur Sr	India	Record daily precipitation	44.5 mm (1.8 in)	18 of 100 (Routine)
Delta	United States	Record low maximum temperature	18.9 C (66.0 F)	18 of 100 (Routine)
Cheboygan	United States	Record daily precipitation	32.0 mm (1.3 in)	18 of 100 (Routine)
Yeotmal	India	Record daily precipitation	41.1 mm (1.6 in)	17 of 100 (Routine)
Sioux Ctr 2 SE	United States	Record high minimum temperature	20.6 C (69.1 F)	17 of 100 (Routine)
Lebo	United States	Record high minimum temperature	23.9 C (75.0 F)	17 of 100 (Routine)
McPherson	United States	Record high minimum temperature	25.0 C (77.0 F)	17 of 100 (Routine)
Norwich	United States	Record high minimum temperature	24.4 C (75.9 F)	17 of 100 (Routine)

Counts by Type and Timescale

564 records

Records set or tied on 20 September 1931 by type: Highest daily maximum 184, Lowest daily maximum 21, Highest daily minimum 250, Lowest daily minimum 4, Heaviest daily rainfall 105.

Records on 20 September 1931 by type
Record type	Records
Highest daily maximum	184
Lowest daily maximum	21
Highest daily minimum	250
Lowest daily minimum	4
Heaviest daily rainfall	105
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1931 by timescale: all-time 0, monthly 15, daily 549.

How Much Records Were Beaten By

448 broken records

Margins by which the 448 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 101.6. Ties are not counted.

Top 20 by Significance

20 September 1931

Top 20 records on 20 September 1931 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1931	Bakhtiarpur, IN	daily rain	127.0 mm (5.0 in)	101.6 mm (4.0 in)	20 years	44 of 100 (Notable)
20 September 1931	Darwin Post Office, AU	monthly high min	29.0 C (84.2 F)	2.3 C (4.1 F)	41 years	41 of 100 (Notable)
20 September 1931	Johnstown, US	daily rain	43.7 mm (1.7 in)	27.4 mm (1.1 in)	36 years	40 of 100 (Notable)
20 September 1931	Marshallville 6 S, US	daily rain	68.6 mm (2.7 in)	52.1 mm (2.1 in)	20 years	36 of 100 (Notable)
20 September 1931	Milledgeville, US	daily rain	64.8 mm (2.6 in)	49.6 mm (2.0 in)	20 years	36 of 100 (Notable)
20 September 1931	Columbus 3 NE, US	daily rain	48.3 mm (1.9 in)	35.9 mm (1.4 in)	28 years	34 of 100 (Routine)
20 September 1931	Crow Agency, US	daily rain	38.1 mm (1.5 in)	20.8 mm (0.8 in)	16 years	32 of 100 (Routine)
20 September 1931	Bihar, IN	daily rain	108.0 mm (4.3 in)	64.8 mm (2.6 in)	16 years	31 of 100 (Routine)
20 September 1931	David City 4E, US	daily rain	64.0 mm (2.5 in)	34.0 mm (1.3 in)	5 years	31 of 100 (Routine)
20 September 1931	Paris, CA	monthly rain	68.3 mm (2.7 in)	11.4 mm (0.4 in)	13 years	30 of 100 (Routine)
20 September 1931	E Tawas, US	daily rain	37.6 mm (1.5 in)	19.8 mm (0.8 in)	6 years	30 of 100 (Routine)
20 September 1931	Seven Oaks (Bellimbopinni), AU	daily rain	49.5 mm (1.9 in)	44.4 mm (1.7 in)	16 years	29 of 100 (Routine)
20 September 1931	Petoskey, US	monthly rain	70.6 mm (2.8 in)	7.1 mm (0.28 in)	31 years	29 of 100 (Routine)
20 September 1931	Brantford, CA	monthly rain	50.5 mm (2.0 in)	4.8 mm (0.19 in)	27 years	28 of 100 (Routine)
20 September 1931	Monticello, US	daily rain	50.8 mm (2.0 in)	32.8 mm (1.3 in)	6 years	28 of 100 (Routine)
20 September 1931	Begusarai, IN	daily rain	72.6 mm (2.9 in)	48.0 mm (1.9 in)	26 years	27 of 100 (Routine)
20 September 1931	Vagra, IN	daily rain	86.4 mm (3.4 in)	44.5 mm (1.8 in)	9 years	27 of 100 (Routine)
20 September 1931	Port Arthur, CA	daily rain	45.7 mm (1.8 in)	15.2 mm (0.6 in)	17 years	25 of 100 (Routine)
20 September 1931	Amchong(Sonepur), IN	daily rain	78.2 mm (3.1 in)	36.8 mm (1.4 in)	9 years	25 of 100 (Routine)
20 September 1931	Saguache, US	daily low max	15.6 C (60.1 F)	4.4 C (7.9 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

1812 to 1931

Records set or tied on this calendar date in each year from 1812 to 1931. 1931 had 564 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 1931-09-20: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 20	430
20 to 40	11
40 to 60	5
60 to 80	1
80 to 100	0
100 to 120	1