Weather Records on 21 November 1970

400 weather records were set or tied worldwide on 21 November 1970. Highest significance: Chingleput, IN.

Key Facts for 21 November 1970

On 21 November 1970, 400 weather records were set or tied at long-record stations worldwide.
65 were record highs and 76 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 393 daily.
Chingleput set a monthly record daily precipitation of 306.0 mm (12.0 in) on 21 November 1970.
Across 159 earlier years (1803 to 2025) the same calendar date averaged 450 records.

Record Map

400 stations

400 station records on 21 November 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 November 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Chingleput	India	Record daily precipitation	306.0 mm (12.0 in)	57 of 100 (Notable)
Tiruttani	India	Record daily precipitation	157.4 mm (6.2 in)	54 of 100 (Notable)
Wick	United Kingdom	Record daily precipitation	25.3 mm (1.0 in)	54 of 100 (Notable)
Palani	India	Record daily precipitation	92.4 mm (3.6 in)	51 of 100 (Notable)
South Solitary Island	Australia	Record daily precipitation	55.6 mm (2.2 in)	50 of 100 (Notable)
Dharapuram	India	Record daily precipitation	86.0 mm (3.4 in)	49 of 100 (Notable)
Superior	United States	Record daily snowfall	20.3 cm (8.0 in)	45 of 100 (Notable)
Listowel Downs	Australia	Record daily precipitation	39.9 mm (1.6 in)	44 of 100 (Notable)
Tiruvallur	India	Record daily precipitation	154.0 mm (6.1 in)	44 of 100 (Notable)
Udumalpet	India	Record daily precipitation	68.1 mm (2.7 in)	41 of 100 (Notable)
Sivaganga	India	Record daily precipitation	67.0 mm (2.6 in)	41 of 100 (Notable)
Mc Intosh 6 SE	United States	Record daily snowfall	10.2 cm (4.0 in)	41 of 100 (Notable)
Graz	Austria	Record daily precipitation	31.8 mm (1.3 in)	40 of 100 (Notable)
Chandragiri	India	Record daily precipitation	120.2 mm (4.7 in)	39 of 100 (Notable)
Marungapuri	India	Record daily precipitation	101.0 mm (4.0 in)	39 of 100 (Notable)
New Salem 5NW	United States	Record daily snowfall	15.2 cm (6.0 in)	39 of 100 (Notable)
Appleton	United States	Record daily snowfall	7.6 cm (3.0 in)	38 of 100 (Notable)
Pahoa 65	United States	Record daily precipitation	120.4 mm (4.7 in)	38 of 100 (Notable)
Byron Bay (Jacaranda Drive)	Australia	Record daily precipitation	81.8 mm (3.2 in)	36 of 100 (Notable)
Lismore (Centre Street)	Australia	Record daily precipitation	43.2 mm (1.7 in)	36 of 100 (Notable)
Zugspitze	Germany	Record daily precipitation	35.2 mm (1.4 in)	36 of 100 (Notable)
Sriperumbudur	India	Record daily precipitation	183.0 mm (7.2 in)	36 of 100 (Notable)
Foxholm 7 N	United States	Record daily snowfall	16.5 cm (6.5 in)	36 of 100 (Notable)
Tirupati	India	Record daily precipitation	91.0 mm (3.6 in)	34 of 100 (Routine)
Chinnar	India	Record daily precipitation	68.6 mm (2.7 in)	34 of 100 (Routine)
Ica	Russia	Record daily precipitation	29.4 mm (1.2 in)	34 of 100 (Routine)
Linton	United States	Record daily snowfall	20.3 cm (8.0 in)	34 of 100 (Routine)
Gvarv	Norway	Record snow depth	25.0 cm (9.8 in)	33 of 100 (Routine)
Red Lodge	United States	Record daily snowfall	30.5 cm (12.0 in)	33 of 100 (Routine)
Bellingham 2 N	United States	Record daily snowfall	6.4 cm (2.5 in)	33 of 100 (Routine)
Alstonville Post Office	Australia	Record daily precipitation	30.2 mm (1.2 in)	32 of 100 (Routine)
Nimbin Post Office	Australia	Record daily precipitation	45.5 mm (1.8 in)	32 of 100 (Routine)
Tallakulam	India	Record daily precipitation	58.6 mm (2.3 in)	32 of 100 (Routine)
Bjornholt	Norway	Record snow depth	63.0 cm (24.8 in)	32 of 100 (Routine)
Cheyyar	India	Record daily precipitation	140.0 mm (5.5 in)	31 of 100 (Routine)
Eureka	United States	Record daily snowfall	10.4 cm (4.1 in)	31 of 100 (Routine)
Manapparai	India	Record daily precipitation	63.0 mm (2.5 in)	30 of 100 (Routine)
Grand Meadow	United States	Record snow depth	10.2 cm (4.0 in)	30 of 100 (Routine)
Elma	United States	Record low maximum temperature	3.3 C (37.9 F)	30 of 100 (Routine)
Marinette	United States	Record daily snowfall	8.9 cm (3.5 in)	30 of 100 (Routine)
Szombathely	Hungary	Record daily precipitation	26.2 mm (1.0 in)	29 of 100 (Routine)
Satyavedu	India	Record daily precipitation	221.4 mm (8.7 in)	29 of 100 (Routine)
Cheyyar	India	Record daily precipitation	89.2 mm (3.5 in)	29 of 100 (Routine)
Talavadi	India	Record daily precipitation	90.0 mm (3.5 in)	29 of 100 (Routine)
Kropotkin	Russia	Record daily precipitation	30.8 mm (1.2 in)	29 of 100 (Routine)
Chinook	United States	Record daily snowfall	5.3 cm (2.1 in)	29 of 100 (Routine)
Cumberland	United States	Record daily snowfall	10.2 cm (4.0 in)	29 of 100 (Routine)
Dindigul	India	Record daily precipitation	56.0 mm (2.2 in)	28 of 100 (Routine)
Glenmorgan	India	Record daily precipitation	80.6 mm (3.2 in)	28 of 100 (Routine)
Wyola 1 SW	United States	Record daily snowfall	14.0 cm (5.5 in)	28 of 100 (Routine)
Cowichan Bay Cherry Point	Canada	Record low minimum temperature	-5.0 C (23.0 F)	27 of 100 (Routine)
Panruti	India	Record daily precipitation	79.0 mm (3.1 in)	27 of 100 (Routine)
Aravakurichi	India	Record daily precipitation	74.0 mm (2.9 in)	27 of 100 (Routine)
Iluppur	India	Record daily precipitation	41.4 mm (1.6 in)	27 of 100 (Routine)
Timber	United States	Record daily snowfall	6.4 cm (2.5 in)	27 of 100 (Routine)
Kane 1NNE	United States	Record daily precipitation	25.9 mm (1.0 in)	27 of 100 (Routine)
Tweed Heads Golf Club	Australia	Record daily precipitation	49.3 mm (1.9 in)	26 of 100 (Routine)
Britannia Beach Furry Cr	Canada	Record low maximum temperature	-1.1 C (30.0 F)	26 of 100 (Routine)
Powell River	Canada	Record low minimum temperature	-3.9 C (25.0 F)	26 of 100 (Routine)
Arni	India	Record daily precipitation	46.2 mm (1.8 in)	26 of 100 (Routine)

Counts by Type and Timescale

400 records

Records set or tied on 21 November 1970 by type: Highest daily maximum 29, Lowest daily maximum 43, Highest daily minimum 36, Lowest daily minimum 33, Heaviest daily rainfall 196, Heaviest daily snowfall 51, Deepest snow cover 12.

Records on 21 November 1970 by type
Record type	Records
Highest daily maximum	29
Lowest daily maximum	43
Highest daily minimum	36
Lowest daily minimum	33
Heaviest daily rainfall	196
Heaviest daily snowfall	51
Deepest snow cover	12

Records on 21 November 1970 by timescale: all-time 0, monthly 7, daily 393.

How Much Records Were Beaten By

337 broken records

Margins by which the 337 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 190.0. Ties are not counted.

Top 20 by Significance

21 November 1970

Top 20 records on 21 November 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 November 1970	Chingleput, IN	monthly rain	306.0 mm (12.0 in)	119.0 mm (4.7 in)	1 year	57 of 100 (Notable)
21 November 1970	Tiruttani, IN	daily rain	157.4 mm (6.2 in)	83.7 mm (3.3 in)	57 years	54 of 100 (Notable)
21 November 1970	Wick, GB	daily rain	25.3 mm (1.0 in)	16.5 mm (0.6 in)	36 years	54 of 100 (Notable)
21 November 1970	Palani, IN	daily rain	92.4 mm (3.6 in)	63.2 mm (2.5 in)	52 years	51 of 100 (Notable)
21 November 1970	South Solitary Island, AU	daily rain	55.6 mm (2.2 in)	37.8 mm (1.5 in)	64 years	50 of 100 (Notable)
21 November 1970	Dharapuram, IN	daily rain	86.0 mm (3.4 in)	54.2 mm (2.1 in)	44 years	49 of 100 (Notable)
21 November 1970	Superior, US	daily snowfall	20.3 cm (8.0 in)	16.2 cm (6.4 in)	24 years	45 of 100 (Notable)
21 November 1970	Listowel Downs, AU	daily rain	39.9 mm (1.6 in)	19.1 mm (0.8 in)	52 years	44 of 100 (Notable)
21 November 1970	Tiruvallur, IN	daily rain	154.0 mm (6.1 in)	63.1 mm (2.5 in)	59 years	44 of 100 (Notable)
21 November 1970	Udumalpet, IN	daily rain	68.1 mm (2.7 in)	35.1 mm (1.4 in)	57 years	41 of 100 (Notable)
21 November 1970	Sivaganga, IN	daily rain	67.0 mm (2.6 in)	30.4 mm (1.2 in)	59 years	41 of 100 (Notable)
21 November 1970	Mc Intosh 6 SE, US	daily snowfall	10.2 cm (4.0 in)	6.4 cm (2.5 in)	48 years	41 of 100 (Notable)
21 November 1970	Graz, AT	daily rain	31.8 mm (1.3 in)	20.9 mm (0.8 in)	4 years	40 of 100 (Notable)
21 November 1970	Chandragiri, IN	daily rain	120.2 mm (4.7 in)	40.4 mm (1.6 in)	57 years	39 of 100 (Notable)
21 November 1970	Marungapuri, IN	daily rain	101.0 mm (4.0 in)	63.1 mm (2.5 in)	12 years	39 of 100 (Notable)
21 November 1970	New Salem 5NW, US	daily snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	16 years	39 of 100 (Notable)
21 November 1970	Appleton, US	daily snowfall	7.6 cm (3.0 in)	4.3 cm (1.7 in)	60 years	38 of 100 (Notable)
21 November 1970	Pahoa 65, US	daily rain	120.4 mm (4.7 in)	73.9 mm (2.9 in)	17 years	38 of 100 (Notable)
21 November 1970	Byron Bay (Jacaranda Drive), AU	daily rain	81.8 mm (3.2 in)	15.8 mm (0.6 in)	71 years	36 of 100 (Notable)
21 November 1970	Lismore (Centre Street), AU	daily rain	43.2 mm (1.7 in)	8.4 mm (0.33 in)	76 years	36 of 100 (Notable)

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 1970

Records set or tied on this calendar date in each year from 1803 to 1970. 1970 had 400 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 1970-11-21: 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 2026-10-15 (15 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	278
25 to 50	28
50 to 75	19
75 to 100	5
100 to 125	4
125 to 150	0
150 to 175	2
175 to 200	1