Weather Records on 20 September 1940

591 weather records were set or tied worldwide on 20 September 1940. Highest significance: Olpad, IN.

Key Facts for 20 September 1940

On 20 September 1940, 591 weather records were set or tied at long-record stations worldwide.
387 were record highs and 22 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 580 daily.
Olpad set a monthly record daily precipitation of 187.2 mm (7.4 in) on 20 September 1940.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 441 records.

Record Map

591 stations

591 station records on 20 September 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Olpad	India	Record daily precipitation	187.2 mm (7.4 in)	57 of 100 (Notable)
Thana	India	Record daily precipitation	243.8 mm (9.6 in)	51 of 100 (Notable)
Surat	India	Record daily precipitation	244.1 mm (9.6 in)	47 of 100 (Notable)
Mahim	India	Record daily precipitation	287.5 mm (11.3 in)	47 of 100 (Notable)
Bridgeport	United States	Record daily precipitation	56.6 mm (2.2 in)	47 of 100 (Notable)
Umbergaon	India	Record daily precipitation	158.0 mm (6.2 in)	43 of 100 (Notable)
Bombay (Colaba) Obsy Sr	India	Record daily precipitation	114.6 mm (4.5 in)	41 of 100 (Notable)
Uran	India	Record daily precipitation	112.5 mm (4.4 in)	41 of 100 (Notable)
Panvel	India	Record daily precipitation	198.4 mm (7.8 in)	39 of 100 (Notable)
Yellow Mountain	Australia	Record daily precipitation	25.4 mm (1.0 in)	38 of 100 (Notable)
Razole(Rajole)	India	Record daily precipitation	109.5 mm (4.3 in)	38 of 100 (Notable)
Bassein	India	Record daily precipitation	194.3 mm (7.6 in)	38 of 100 (Notable)
Bardoli	India	Record daily precipitation	142.7 mm (5.6 in)	37 of 100 (Notable)
Kurla	India	Record daily precipitation	341.1 mm (13.4 in)	37 of 100 (Notable)
Bhiwandi	India	Record daily precipitation	205.7 mm (8.1 in)	37 of 100 (Notable)
Dahanu	India	Record daily precipitation	323.6 mm (12.7 in)	35 of 100 (Notable)
Nidingen A	Sweden	Record daily precipitation	32.0 mm (1.3 in)	35 of 100 (Notable)
Santa Fe	United States	Record daily precipitation	32.0 mm (1.3 in)	34 of 100 (Routine)
Dahej	India	Record daily precipitation	95.3 mm (3.8 in)	33 of 100 (Routine)
Den Helder-1	Netherlands	Record daily precipitation	26.7 mm (1.1 in)	33 of 100 (Routine)
Valod	India	Record daily precipitation	135.4 mm (5.3 in)	32 of 100 (Routine)
Chikhli	India	Record daily precipitation	181.1 mm (7.1 in)	31 of 100 (Routine)
Taloda	India	Record daily precipitation	77.5 mm (3.1 in)	31 of 100 (Routine)
Invergordon	Australia	Record daily precipitation	26.2 mm (1.0 in)	30 of 100 (Routine)
Bansda	India	Record daily precipitation	168.4 mm (6.6 in)	29 of 100 (Routine)
Sveg	Sweden	Record daily precipitation	29.1 mm (1.1 in)	29 of 100 (Routine)
Orogrande	United States	Record daily precipitation	31.0 mm (1.2 in)	29 of 100 (Routine)
Jalalpur	India	Record daily precipitation	174.5 mm (6.9 in)	28 of 100 (Routine)
Cet Central England	United Kingdom	Record high maximum temperature	21.9 C (71.4 F)	28 of 100 (Routine)
Manitowoc	United States	Record high minimum temperature	23.3 C (73.9 F)	28 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record daily precipitation	32.5 mm (1.3 in)	27 of 100 (Routine)
Kalyan	India	Record daily precipitation	156.2 mm (6.1 in)	26 of 100 (Routine)
Schriever	United States	Record low maximum temperature	22.8 C (73.0 F)	26 of 100 (Routine)
Ogies (Pol)	South Africa	Record daily precipitation	43.9 mm (1.7 in)	25 of 100 (Routine)
Ashland Exp Farm	United States	Record high minimum temperature	19.4 C (66.9 F)	25 of 100 (Routine)
Manitowoc	United States	Record high maximum temperature	31.7 C (89.1 F)	25 of 100 (Routine)
Yorkton	Canada	Record high minimum temperature	15.0 C (59.0 F)	24 of 100 (Routine)
White River	Canada	Record high minimum temperature	16.7 C (62.1 F)	24 of 100 (Routine)
Kolaras	India	Record daily precipitation	38.1 mm (1.5 in)	24 of 100 (Routine)
Brocken	Germany	Record daily precipitation	30.2 mm (1.2 in)	23 of 100 (Routine)
Rajpipla(Nandod)	India	Record daily precipitation	69.1 mm (2.7 in)	23 of 100 (Routine)
Igatpuri	India	Record daily precipitation	102.9 mm (4.1 in)	23 of 100 (Routine)
Hardoi	India	Record daily precipitation	74.9 mm (2.9 in)	23 of 100 (Routine)
Two Harbors	United States	Record high minimum temperature	15.0 C (59.0 F)	22 of 100 (Routine)
Genoa 2 W	United States	Record high maximum temperature	38.9 C (102.0 F)	22 of 100 (Routine)
Amenia	United States	Record high minimum temperature	18.3 C (64.9 F)	22 of 100 (Routine)
Escanaba	United States	Record high minimum temperature	18.3 C (64.9 F)	22 of 100 (Routine)
White River	Canada	Record high maximum temperature	27.8 C (82.0 F)	21 of 100 (Routine)
Augsburg (Sankt Stephan)	Germany	Record high minimum temperature	14.5 C (58.1 F)	21 of 100 (Routine)
Jafrabad	India	Record daily precipitation	87.4 mm (3.4 in)	21 of 100 (Routine)
Partabgarh	India	Record daily precipitation	51.3 mm (2.0 in)	21 of 100 (Routine)
Madison Sewage Plt	United States	Record high maximum temperature	36.7 C (98.1 F)	21 of 100 (Routine)
Hot Springs	United States	Record high minimum temperature	18.3 C (64.9 F)	21 of 100 (Routine)
Fergana	Uzbekistan	Record high minimum temperature	15.8 C (60.4 F)	21 of 100 (Routine)
Mallan (Niemur Valley)	Australia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Numurkah Post Office	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Murrawombi	Australia	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Goonumbla (Coradgery)	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Mungindi (Cambo Cambo)	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Riverside 7 SSW	United States	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

591 records

Records set or tied on 20 September 1940 by type: Highest daily maximum 227, Lowest daily maximum 18, Highest daily minimum 160, Lowest daily minimum 4, Heaviest daily rainfall 182.

Records on 20 September 1940 by type
Record type	Records
Highest daily maximum	227
Lowest daily maximum	18
Highest daily minimum	160
Lowest daily minimum	4
Heaviest daily rainfall	182
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1940 by timescale: all-time 1, monthly 10, daily 580.

How Much Records Were Beaten By

465 broken records

Margins by which the 465 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 177.3. Ties are not counted.

Top 20 by Significance

20 September 1940

Top 20 records on 20 September 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1940	Olpad, IN	monthly rain	187.2 mm (7.4 in)	72.4 mm (2.9 in)	26 years	57 of 100 (Notable)
20 September 1940	Thana, IN	daily rain	243.8 mm (9.6 in)	177.3 mm (7.0 in)	26 years	51 of 100 (Notable)
20 September 1940	Surat, IN	monthly rain	244.1 mm (9.6 in)	59.9 mm (2.4 in)	7 years	47 of 100 (Notable)
20 September 1940	Mahim, IN	daily rain	287.5 mm (11.3 in)	174.5 mm (6.9 in)	12 years	47 of 100 (Notable)
20 September 1940	Bridgeport, US	daily rain	56.6 mm (2.2 in)	50.2 mm (2.0 in)	12 years	47 of 100 (Notable)
20 September 1940	Umbergaon, IN	daily rain	158.0 mm (6.2 in)	57.7 mm (2.3 in)	38 years	43 of 100 (Notable)
20 September 1940	Bombay (Colaba) Obsy Sr, IN	daily rain	114.6 mm (4.5 in)	72.2 mm (2.8 in)	27 years	41 of 100 (Notable)
20 September 1940	Uran, IN	daily rain	112.5 mm (4.4 in)	81.5 mm (3.2 in)	18 years	41 of 100 (Notable)
20 September 1940	Panvel, IN	monthly rain	198.4 mm (7.8 in)	40.9 mm (1.6 in)	26 years	39 of 100 (Notable)
20 September 1940	Yellow Mountain, AU	daily rain	25.4 mm (1.0 in)	20.3 mm (0.8 in)	32 years	38 of 100 (Notable)
20 September 1940	Razole(Rajole), IN	daily rain	109.5 mm (4.3 in)	52.6 mm (2.1 in)	30 years	38 of 100 (Notable)
20 September 1940	Bassein, IN	daily rain	194.3 mm (7.6 in)	78.7 mm (3.1 in)	12 years	38 of 100 (Notable)
20 September 1940	Bardoli, IN	daily rain	142.7 mm (5.6 in)	64.0 mm (2.5 in)	23 years	37 of 100 (Notable)
20 September 1940	Kurla, IN	monthly rain	341.1 mm (13.4 in)	54.1 mm (2.1 in)	10 years	37 of 100 (Notable)
20 September 1940	Bhiwandi, IN	daily rain	205.7 mm (8.1 in)	68.5 mm (2.7 in)	24 years	37 of 100 (Notable)
20 September 1940	Dahanu, IN	all-time rain	323.6 mm (12.7 in)	0.5 mm (0.02 in)	38 years	35 of 100 (Notable)
20 September 1940	Nidingen A, SE	daily rain	32.0 mm (1.3 in)	15.0 mm (0.6 in)	16 years	35 of 100 (Notable)
20 September 1940	Santa Fe, US	daily rain	32.0 mm (1.3 in)	17.8 mm (0.7 in)	11 years	34 of 100 (Routine)
20 September 1940	Dahej, IN	daily rain	95.3 mm (3.8 in)	63.5 mm (2.5 in)	9 years	33 of 100 (Routine)
20 September 1940	Den Helder-1, NL	daily rain	26.7 mm (1.1 in)	1.0 mm (0.04 in)	76 years	33 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 1940

Records set or tied on this calendar date in each year from 1812 to 1940. 1940 had 591 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 1940-09-20: 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 25	439
25 to 50	10
50 to 75	12
75 to 100	2
100 to 125	0
125 to 150	0
150 to 175	1
175 to 200	1