Weather Records on 21 November 1940

337 weather records were set or tied worldwide on 21 November 1940. Highest significance: Copper, US.

Key Facts for 21 November 1940

On 21 November 1940, 337 weather records were set or tied at long-record stations worldwide.
57 were record highs and 28 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 333 daily.
Copper set a monthly record daily precipitation of 43.9 mm (1.7 in) on 21 November 1940.
Across 159 earlier years (1803 to 2025) the same calendar date averaged 450 records.

Record Map

337 stations

337 station records on 21 November 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 November 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Copper	United States	Record daily precipitation	43.9 mm (1.7 in)	56 of 100 (Notable)
Skegness	United Kingdom	Record daily precipitation	27.9 mm (1.1 in)	52 of 100 (Notable)
Sheffield	United Kingdom	Record daily precipitation	28.2 mm (1.1 in)	51 of 100 (Notable)
Mirranatwa (Bowacka)	Australia	Record daily precipitation	45.0 mm (1.8 in)	47 of 100 (Notable)
Malvern	United Kingdom	Record daily precipitation	29.7 mm (1.2 in)	45 of 100 (Notable)
Virginia City	United States	Record daily snowfall	15.2 cm (6.0 in)	44 of 100 (Notable)
Penneshaw 2	Australia	Record daily precipitation	27.9 mm (1.1 in)	43 of 100 (Notable)
Fergus Falls	United States	Record daily snowfall	14.7 cm (5.8 in)	41 of 100 (Notable)
Cape Willoughby	Australia	Record daily precipitation	28.2 mm (1.1 in)	40 of 100 (Notable)
Willsons River	Australia	Record daily precipitation	34.5 mm (1.4 in)	38 of 100 (Notable)
Oberlin	United States	Record daily snowfall	17.8 cm (7.0 in)	38 of 100 (Notable)
Tulsa	United States	Record daily precipitation	50.5 mm (2.0 in)	36 of 100 (Notable)
Brunswick	United States	Record daily precipitation	38.6 mm (1.5 in)	35 of 100 (Notable)
Hartington	United States	Record daily snowfall	17.8 cm (7.0 in)	35 of 100 (Notable)
Yates Ctr	United States	Record daily precipitation	41.9 mm (1.6 in)	34 of 100 (Routine)
Brookings 2 NE	United States	Record daily snowfall	10.2 cm (4.0 in)	32 of 100 (Routine)
Kealakekua 2 28.7	United States	Record daily precipitation	47.5 mm (1.9 in)	32 of 100 (Routine)
Warranooke (Glenorchy)	Australia	Record daily precipitation	25.9 mm (1.0 in)	31 of 100 (Routine)
Sattur	India	Record daily precipitation	70.1 mm (2.8 in)	30 of 100 (Routine)
Castlewood	United States	Record daily snowfall	14.0 cm (5.5 in)	30 of 100 (Routine)
Oconto 4 W	United States	Record daily precipitation	52.1 mm (2.1 in)	30 of 100 (Routine)
Leipzig-Holzhausen	Germany	Record high maximum temperature	12.9 C (55.2 F)	29 of 100 (Routine)
Oorschot	South Africa	Record daily precipitation	50.8 mm (2.0 in)	29 of 100 (Routine)
Bird Island	United States	Record daily snowfall	12.7 cm (5.0 in)	29 of 100 (Routine)
Cascade 5 S	United States	Record daily snowfall	19.1 cm (7.5 in)	29 of 100 (Routine)
Arkonam	India	Record daily precipitation	111.8 mm (4.4 in)	28 of 100 (Routine)
Little Sioux	United States	Record daily snowfall	5.1 cm (2.0 in)	28 of 100 (Routine)
Denison Hwy 60 Brg	United States	Record daily precipitation	34.3 mm (1.4 in)	27 of 100 (Routine)
Cobar Post Office	Australia	Record high minimum temperature	26.9 C (80.4 F)	26 of 100 (Routine)
Port Arthur	Canada	Record daily snowfall	22.9 cm (9.0 in)	25 of 100 (Routine)
Postmyr I Drangedal	Norway	Record snow depth	67.0 cm (26.4 in)	25 of 100 (Routine)
Gallatin 1W	United States	Record daily precipitation	27.9 mm (1.1 in)	25 of 100 (Routine)
David City 4E	United States	Record daily snowfall	10.2 cm (4.0 in)	25 of 100 (Routine)
Kon-Kolodez	Russia	Record high minimum temperature	8.0 C (46.4 F)	24 of 100 (Routine)
Brawley 2 SW	United States	Record low maximum temperature	13.3 C (55.9 F)	24 of 100 (Routine)
Ottawa	United States	Record daily precipitation	50.8 mm (2.0 in)	24 of 100 (Routine)
Goldbutte 7 N	United States	Record daily snowfall	8.1 cm (3.2 in)	23 of 100 (Routine)
Centerville 6 SE	United States	Record daily snowfall	8.9 cm (3.5 in)	23 of 100 (Routine)
Evanston 1 E	United States	Record daily snowfall	8.9 cm (3.5 in)	23 of 100 (Routine)
Robe Comparison	Australia	Record low maximum temperature	12.1 C (53.8 F)	22 of 100 (Routine)
Pincher Creek Town	Canada	Record daily snowfall	15.2 cm (6.0 in)	22 of 100 (Routine)
Ai-Petri	Ukraine	Record high maximum temperature	19.1 C (66.4 F)	22 of 100 (Routine)
Iola 1 W	United States	Record daily precipitation	30.2 mm (1.2 in)	22 of 100 (Routine)
Putbus	Germany	Record high maximum temperature	9.8 C (49.6 F)	21 of 100 (Routine)
Blanco	United States	Record daily precipitation	36.1 mm (1.4 in)	21 of 100 (Routine)
Ufa	Russia	Record daily precipitation	19.4 mm (0.8 in)	20 of 100 (Routine)
Cowell	Australia	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Hull	United Kingdom	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Smith Bay (Smiths Bay)	Australia	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Goldbutte 7 N	United States	Record daily precipitation	12.4 mm (0.5 in)	20 of 100 (Routine)
Warooka	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Kingscote (Karinga)	Australia	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Terang (Sunnyside)	Australia	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Kingscote	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Stansbury	Australia	Record daily precipitation	13.0 mm (0.5 in)	20 of 100 (Routine)
Brentwood Post Office	Australia	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Port Victoria	Australia	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Nhill (Woorak)	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Los Lunas	United States	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Rawsonville (Pol)	South Africa	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

337 records

Records set or tied on 21 November 1940 by type: Highest daily maximum 27, Lowest daily maximum 18, Highest daily minimum 30, Lowest daily minimum 10, Heaviest daily rainfall 215, Heaviest daily snowfall 28, Deepest snow cover 9.

Records on 21 November 1940 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	18
Highest daily minimum	30
Lowest daily minimum	10
Heaviest daily rainfall	215
Heaviest daily snowfall	28
Deepest snow cover	9

Records on 21 November 1940 by timescale: all-time 0, monthly 4, daily 333.

How Much Records Were Beaten By

309 broken records

Margins by which the 309 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 180.0. Ties are not counted.

Top 20 by Significance

21 November 1940

Top 20 records on 21 November 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 November 1940	Copper, US	monthly rain	43.9 mm (1.7 in)	21.0 mm (0.8 in)	13 years	56 of 100 (Notable)
21 November 1940	Skegness, GB	daily rain	27.9 mm (1.1 in)	18.8 mm (0.7 in)	32 years	52 of 100 (Notable)
21 November 1940	Sheffield, GB	daily rain	28.2 mm (1.1 in)	18.8 mm (0.7 in)	39 years	51 of 100 (Notable)
21 November 1940	Mirranatwa (Bowacka), AU	daily rain	45.0 mm (1.8 in)	37.4 mm (1.5 in)	11 years	47 of 100 (Notable)
21 November 1940	Malvern, GB	daily rain	29.7 mm (1.2 in)	20.3 mm (0.8 in)	12 years	45 of 100 (Notable)
21 November 1940	Virginia City, US	daily snowfall	15.2 cm (6.0 in)	12.7 cm (5.0 in)	46 years	44 of 100 (Notable)
21 November 1940	Penneshaw 2, AU	daily rain	27.9 mm (1.1 in)	21.8 mm (0.9 in)	29 years	43 of 100 (Notable)
21 November 1940	Fergus Falls, US	daily snowfall	14.7 cm (5.8 in)	12.2 cm (4.8 in)	2 years	41 of 100 (Notable)
21 November 1940	Cape Willoughby, AU	daily rain	28.2 mm (1.1 in)	22.4 mm (0.9 in)	23 years	40 of 100 (Notable)
21 November 1940	Willsons River, AU	daily rain	34.5 mm (1.4 in)	22.6 mm (0.9 in)	24 years	38 of 100 (Notable)
21 November 1940	Oberlin, US	daily snowfall	17.8 cm (7.0 in)	10.2 cm (4.0 in)	34 years	38 of 100 (Notable)
21 November 1940	Tulsa, US	daily rain	50.5 mm (2.0 in)	27.6 mm (1.1 in)	41 years	36 of 100 (Notable)
21 November 1940	Brunswick, US	daily rain	38.6 mm (1.5 in)	18.3 mm (0.7 in)	46 years	35 of 100 (Notable)
21 November 1940	Hartington, US	daily snowfall	17.8 cm (7.0 in)	12.7 cm (5.0 in)	9 years	35 of 100 (Notable)
21 November 1940	Yates Ctr, US	daily rain	41.9 mm (1.6 in)	33.8 mm (1.3 in)	24 years	34 of 100 (Routine)
21 November 1940	Brookings 2 NE, US	daily snowfall	10.2 cm (4.0 in)	4.9 cm (1.9 in)	41 years	32 of 100 (Routine)
21 November 1940	Kealakekua 2 28.7, US	daily rain	47.5 mm (1.9 in)	22.1 mm (0.9 in)	34 years	32 of 100 (Routine)
21 November 1940	Warranooke (Glenorchy), AU	daily rain	25.9 mm (1.0 in)	12.9 mm (0.5 in)	41 years	31 of 100 (Routine)
21 November 1940	Sattur, IN	daily rain	70.1 mm (2.8 in)	44.2 mm (1.7 in)	20 years	30 of 100 (Routine)
21 November 1940	Castlewood, US	daily snowfall	14.0 cm (5.5 in)	8.9 cm (3.5 in)	5 years	30 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

1803 to 1940

Records set or tied on this calendar date in each year from 1803 to 1940. 1940 had 337 records.

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

Records on 11-21 in each year
Year	Records
1803	1
1816	2
1821	2
1829	1
1835	1
1839	1
1844	1
1847	1
1855	1
1856	1
1857	1
1858	4
1866	1
1868	1
1870	2
1871	2
1872	1
1873	2
1874	1
1876	2
1879	4
1880	4
1881	1
1882	1
1883	3
1887	3
1889	1
1890	7
1893	1
1894	4
1896	1
1897	4
1898	3
1899	4
1900	7
1901	5
1902	7
1903	5
1904	9
1905	3
1906	14
1907	7
1908	9
1909	18
1910	23
1911	19
1912	14
1913	79
1914	51
1915	21
1916	66
1917	248
1918	12
1919	22
1920	36
1921	96
1922	42
1923	27
1924	104
1925	73
1926	420
1927	108
1928	109
1929	467
1930	243
1931	682
1932	162
1933	381
1934	578
1935	62
1936	192
1937	1,309
1938	119
1939	303
1940	337
1941	329
1942	662
1943	212
1944	250
1945	308
1946	604
1947	540
1948	414
1949	588
1950	904
1951	605
1952	424
1953	408
1954	927
1955	419
1956	624
1957	442
1958	407
1959	460
1960	691
1961	738
1962	524
1963	601
1964	1,014
1965	448
1966	589
1967	336
1968	358
1969	611
1970	400
1971	514
1972	735
1973	1,100
1974	809
1975	548
1976	315
1977	1,313
1978	1,034
1979	1,409
1980	805
1981	939
1982	807
1983	1,066
1984	525
1985	1,808
1986	815
1987	949
1988	928
1989	797
1990	1,337
1991	944
1992	1,375
1993	1,413
1994	1,179
1995	1,084
1996	1,882
1997	449
1998	1,312
1999	920
2000	1,191
2001	811
2002	847
2003	1,007
2004	873
2005	491
2006	1,181
2007	936
2008	1,079
2009	1,131
2010	894
2011	944
2012	792
2013	543
2014	815
2015	785
2016	1,000
2017	687
2018	391
2019	653
2020	421
2021	296
2022	824
2023	584
2024	519
2025	745

Download the Data

Data for records on 1940-11-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 25	274
25 to 50	23
50 to 75	4
75 to 100	2
100 to 125	3
125 to 150	2
150 to 175	0
175 to 200	1