Weather Records on 21 October 1963

725 weather records were set or tied worldwide on 21 October 1963. Highest significance: Nagappattinam, IN.

Key Facts for 21 October 1963

On 21 October 1963, 725 weather records were set or tied at long-record stations worldwide.
434 were record highs and 7 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 716 daily.
Nagappattinam set a daily record precipitation of 236.8 mm (9.3 in) on 21 October 1963.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 418 records.

Record Map

725 stations

725 station records on 21 October 1963 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 October 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nagappattinam	India	Record daily precipitation	236.8 mm (9.3 in)	61 of 100 (Major)
Morris W Cntrl Rsch & Outreach	United States	Record daily precipitation	46.7 mm (1.8 in)	57 of 100 (Notable)
Victoria Gonzales Hts	Canada	Record daily precipitation	48.0 mm (1.9 in)	54 of 100 (Notable)
Peddapuram	India	Record daily precipitation	190.5 mm (7.5 in)	54 of 100 (Notable)
Saanichton Cda	Canada	Record daily precipitation	46.7 mm (1.8 in)	51 of 100 (Notable)
Storm Lake	United States	Record daily precipitation	37.3 mm (1.5 in)	51 of 100 (Notable)
Saanich Dom Astro Obs	Canada	Record daily precipitation	47.5 mm (1.9 in)	50 of 100 (Notable)
Tirupoondi	India	Record daily precipitation	156.2 mm (6.1 in)	50 of 100 (Notable)
Luz (Estacao)	Brazil	Record daily precipitation	54.4 mm (2.1 in)	49 of 100 (Notable)
Tatlayoko Lake	Canada	Record daily precipitation	37.8 mm (1.5 in)	49 of 100 (Notable)
Merritt	Canada	Record daily precipitation	27.2 mm (1.1 in)	49 of 100 (Notable)
Frazerpet	India	Record daily precipitation	88.9 mm (3.5 in)	48 of 100 (Notable)
Cushman Dam	United States	Record daily precipitation	104.1 mm (4.1 in)	48 of 100 (Notable)
Red Pass Junction	Canada	Record daily precipitation	30.5 mm (1.2 in)	47 of 100 (Notable)
Winton	South Africa	Record daily precipitation	34.2 mm (1.3 in)	47 of 100 (Notable)
Lyons 3 S	United States	Record daily precipitation	54.9 mm (2.2 in)	46 of 100 (Notable)
James Island	Canada	Record daily precipitation	43.4 mm (1.7 in)	45 of 100 (Notable)
Hickman	United States	Record daily precipitation	38.1 mm (1.5 in)	45 of 100 (Notable)
Breckenridge	United States	Record daily precipitation	28.7 mm (1.1 in)	44 of 100 (Notable)
Nannilam	India	Record daily precipitation	143.4 mm (5.6 in)	43 of 100 (Notable)
Archer	United States	Record daily precipitation	36.3 mm (1.4 in)	43 of 100 (Notable)
Chemainus	Canada	Record daily precipitation	63.5 mm (2.5 in)	42 of 100 (Notable)
Yellamanchili	India	Record daily precipitation	146.6 mm (5.8 in)	42 of 100 (Notable)
Potter	United States	Record daily precipitation	33.8 mm (1.3 in)	40 of 100 (Notable)
Tanjavur	India	Record daily precipitation	64.2 mm (2.5 in)	39 of 100 (Notable)
Myklebust I Breim	Norway	Record daily precipitation	62.5 mm (2.5 in)	39 of 100 (Notable)
Hambantota	Sri Lanka	Record low maximum temperature	27.6 C (81.7 F)	38 of 100 (Notable)
Thiruthuraipoond	India	Record daily precipitation	110.0 mm (4.3 in)	37 of 100 (Notable)
Pender Island	Canada	Record daily precipitation	42.7 mm (1.7 in)	36 of 100 (Notable)
Alta Lake 2	Canada	Record daily precipitation	53.1 mm (2.1 in)	36 of 100 (Notable)
Gudur(Guduru)	India	Record daily precipitation	82.5 mm (3.2 in)	36 of 100 (Notable)
Yercaud	India	Record daily precipitation	183.2 mm (7.2 in)	36 of 100 (Notable)
Fairbury 7S	United States	Record daily precipitation	34.3 mm (1.4 in)	36 of 100 (Notable)
Saltspring Island	Canada	Record daily precipitation	42.7 mm (1.7 in)	35 of 100 (Notable)
Kallatty	India	Record daily precipitation	100.0 mm (3.9 in)	35 of 100 (Notable)
Marydale (Pol)	South Africa	Record daily precipitation	29.0 mm (1.1 in)	35 of 100 (Notable)
New London	United States	Record daily precipitation	32.3 mm (1.3 in)	35 of 100 (Notable)
Port Hastings	Canada	Record high maximum temperature	20.6 C (69.1 F)	34 of 100 (Routine)
Tada	India	Record daily precipitation	146.0 mm (5.7 in)	34 of 100 (Routine)
Nidamangalam	India	Record daily precipitation	89.0 mm (3.5 in)	34 of 100 (Routine)
Coloso	Puerto Rico [United States]	Record daily precipitation	68.8 mm (2.7 in)	34 of 100 (Routine)
Faribault	United States	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Mitchell 5E	United States	Record daily precipitation	30.7 mm (1.2 in)	34 of 100 (Routine)
Spruce	United States	Record daily precipitation	99.8 mm (3.9 in)	34 of 100 (Routine)
Cowichan Bay Cherry Point	Canada	Record daily precipitation	38.6 mm (1.5 in)	33 of 100 (Routine)
Mangalgiri	India	Record daily precipitation	152.4 mm (6.0 in)	33 of 100 (Routine)
Nueva Rosita	Mexico	Record daily precipitation	85.3 mm (3.4 in)	33 of 100 (Routine)
Dedeben (Pol)	South Africa	Record daily precipitation	25.6 mm (1.0 in)	33 of 100 (Routine)
Cherokee	United States	Record daily precipitation	33.8 mm (1.3 in)	33 of 100 (Routine)
Cambridge Galt Moe	Canada	Record high minimum temperature	10.0 C (50.0 F)	32 of 100 (Routine)
Bukkapatnam	India	Record daily precipitation	44.2 mm (1.7 in)	32 of 100 (Routine)
Tanakal(Tanakall)	India	Record daily precipitation	45.7 mm (1.8 in)	32 of 100 (Routine)
Sunticoppa	India	Record daily precipitation	90.2 mm (3.6 in)	32 of 100 (Routine)
Trichur	India	Record daily precipitation	95.3 mm (3.8 in)	32 of 100 (Routine)
Ariyalur	India	Record daily precipitation	75.0 mm (3.0 in)	32 of 100 (Routine)
Three Rivers Ed Ph 2	United States	Record high minimum temperature	15.6 C (60.1 F)	32 of 100 (Routine)
Pocahontas	United States	Record daily precipitation	33.3 mm (1.3 in)	32 of 100 (Routine)
Sedgwick	United States	Record daily precipitation	38.6 mm (1.5 in)	32 of 100 (Routine)
Landsborough	Australia	Record daily precipitation	30.0 mm (1.2 in)	31 of 100 (Routine)
Turuvekere	India	Record daily precipitation	84.1 mm (3.3 in)	31 of 100 (Routine)

Counts by Type and Timescale

725 records

Records set or tied on 21 October 1963 by type: Highest daily maximum 136, Lowest daily maximum 4, Highest daily minimum 298, Lowest daily minimum 3, Heaviest daily rainfall 283, Heaviest daily snowfall 1.

Records on 21 October 1963 by type
Record type	Records
Highest daily maximum	136
Lowest daily maximum	4
Highest daily minimum	298
Lowest daily minimum	3
Heaviest daily rainfall	283
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 21 October 1963 by timescale: all-time 0, monthly 9, daily 716.

How Much Records Were Beaten By

568 broken records

Margins by which the 568 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 146.1. Ties are not counted.

Top 20 by Significance

21 October 1963

Top 20 records on 21 October 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1963	Nagappattinam, IN	daily rain	236.8 mm (9.3 in)	146.1 mm (5.8 in)	52 years	61 of 100 (Major)
21 October 1963	Morris W Cntrl Rsch & Outreach, US	daily rain	46.7 mm (1.8 in)	31.0 mm (1.2 in)	42 years	57 of 100 (Notable)
21 October 1963	Victoria Gonzales Hts, CA	daily rain	48.0 mm (1.9 in)	33.8 mm (1.3 in)	29 years	54 of 100 (Notable)
21 October 1963	Peddapuram, IN	daily rain	190.5 mm (7.5 in)	123.2 mm (4.9 in)	34 years	54 of 100 (Notable)
21 October 1963	Saanichton Cda, CA	daily rain	46.7 mm (1.8 in)	35.8 mm (1.4 in)	20 years	51 of 100 (Notable)
21 October 1963	Storm Lake, US	daily rain	37.3 mm (1.5 in)	26.9 mm (1.1 in)	62 years	51 of 100 (Notable)
21 October 1963	Saanich Dom Astro Obs, CA	daily rain	47.5 mm (1.9 in)	38.1 mm (1.5 in)	20 years	50 of 100 (Notable)
21 October 1963	Tirupoondi, IN	daily rain	156.2 mm (6.1 in)	72.6 mm (2.9 in)	56 years	50 of 100 (Notable)
21 October 1963	Luz (Estacao), BR	daily rain	54.4 mm (2.1 in)	31.5 mm (1.2 in)	60 years	49 of 100 (Notable)
21 October 1963	Tatlayoko Lake, CA	daily rain	37.8 mm (1.5 in)	32.2 mm (1.3 in)	22 years	49 of 100 (Notable)
21 October 1963	Merritt, CA	daily rain	27.2 mm (1.1 in)	24.2 mm (1.0 in)	16 years	49 of 100 (Notable)
21 October 1963	Frazerpet, IN	daily rain	88.9 mm (3.5 in)	37.6 mm (1.5 in)	61 years	48 of 100 (Notable)
21 October 1963	Cushman Dam, US	daily rain	104.1 mm (4.1 in)	71.6 mm (2.8 in)	28 years	48 of 100 (Notable)
21 October 1963	Red Pass Junction, CA	daily rain	30.5 mm (1.2 in)	21.6 mm (0.9 in)	22 years	47 of 100 (Notable)
21 October 1963	Winton, ZA	daily rain	34.2 mm (1.3 in)	27.8 mm (1.1 in)	24 years	47 of 100 (Notable)
21 October 1963	Lyons 3 S, US	daily rain	54.9 mm (2.2 in)	48.5 mm (1.9 in)	21 years	46 of 100 (Notable)
21 October 1963	James Island, CA	daily rain	43.4 mm (1.7 in)	22.8 mm (0.9 in)	29 years	45 of 100 (Notable)
21 October 1963	Hickman, US	daily rain	38.1 mm (1.5 in)	24.1 mm (0.9 in)	62 years	45 of 100 (Notable)
21 October 1963	Breckenridge, US	daily rain	28.7 mm (1.1 in)	19.0 mm (0.7 in)	12 years	44 of 100 (Notable)
21 October 1963	Nannilam, IN	daily rain	143.4 mm (5.6 in)	55.5 mm (2.2 in)	40 years	43 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

1795 to 1963

Records set or tied on this calendar date in each year from 1795 to 1963. 1963 had 725 records.

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

Records on 10-21 in each year
Year	Records
1795	1
1802	2
1805	1
1808	1
1810	1
1834	1
1835	1
1840	1
1845	1
1847	1
1850	1
1851	2
1854	1
1859	1
1863	1
1864	1
1866	3
1867	1
1868	3
1869	2
1871	1
1872	1
1873	1
1874	1
1876	4
1877	2
1878	1
1880	3
1881	1
1883	1
1886	1
1888	2
1889	2
1890	3
1891	6
1892	6
1893	1
1894	1
1895	2
1896	5
1898	6
1899	3
1900	2
1901	9
1902	2
1903	3
1904	30
1905	15
1906	11
1907	35
1908	35
1909	19
1910	21
1911	10
1912	18
1913	59
1914	35
1915	43
1916	70
1917	208
1918	18
1919	102
1920	149
1921	58
1922	78
1923	81
1924	389
1925	150
1926	77
1927	187
1928	78
1929	200
1930	492
1931	217
1932	165
1933	733
1934	407
1935	707
1936	407
1937	132
1938	121
1939	491
1940	537
1941	644
1942	258
1943	421
1944	367
1945	538
1946	297
1947	977
1948	266
1949	1,015
1950	438
1951	382
1952	848
1953	1,579
1954	279
1955	481
1956	276
1957	511
1958	322
1959	410
1960	408
1961	553
1962	359
1963	725
1964	457
1965	465
1966	425
1967	472
1968	174
1969	881
1970	548
1971	498
1972	813
1973	464
1974	866
1975	509
1976	1,467
1977	451
1978	616
1979	1,958
1980	378
1981	667
1982	870
1983	786
1984	1,872
1985	776
1986	814
1987	852
1988	696
1989	1,668
1990	807
1991	877
1992	1,095
1993	845
1994	670
1995	1,120
1996	1,581
1997	915
1998	711
1999	688
2000	771
2001	610
2002	1,241
2003	2,066
2004	1,674
2005	949
2006	1,057
2007	916
2008	610
2009	713
2010	710
2011	662
2012	703
2013	440
2014	716
2015	493
2016	734
2017	750
2018	440
2019	757
2020	1,135
2021	574
2022	629
2023	890
2024	1,138
2025	364

Download the Data

Data for records on 1963-10-21: 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 2026-10-13 (13 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 20	502
20 to 40	49
40 to 60	10
60 to 80	4
80 to 100	1
100 to 120	0
120 to 140	1
140 to 160	1