Weather Records on 21 April 1963

778 weather records were set or tied worldwide on 21 April 1963. Highest significance: Nalgonda, IN.

Key Facts for 21 April 1963

On 21 April 1963, 778 weather records were set or tied at long-record stations worldwide.
268 were record highs and 249 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 27 monthly and 751 daily.
Nalgonda set a daily record precipitation of 61.0 mm (2.4 in) on 21 April 1963.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

778 stations

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

Weather records on 21 April 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nalgonda	India	Record daily precipitation	61.0 mm (2.4 in)	63 of 100 (Major)
Hetch Hetchy	United States	Record snow depth	38.1 cm (15.0 in)	60 of 100 (Major)
Coalville	United States	Record daily snowfall	15.2 cm (6.0 in)	55 of 100 (Notable)
Austin 3 S	United States	Record daily snowfall	15.2 cm (6.0 in)	52 of 100 (Notable)
Ninghan Station	Australia	Record daily precipitation	39.4 mm (1.6 in)	50 of 100 (Notable)
Lovell	United States	Record daily snowfall	7.6 cm (3.0 in)	46 of 100 (Notable)
Karloning	Australia	Record daily precipitation	46.2 mm (1.8 in)	44 of 100 (Notable)
Gillette 3SE	United States	Record daily snowfall	14.5 cm (5.7 in)	43 of 100 (Notable)
Grace	United States	Record daily snowfall	12.7 cm (5.0 in)	42 of 100 (Notable)
Pioche	United States	Record daily snowfall	10.2 cm (4.0 in)	40 of 100 (Notable)
Worland	United States	Record daily snowfall	12.7 cm (5.0 in)	40 of 100 (Notable)
Towan	Australia	Record daily precipitation	40.9 mm (1.6 in)	39 of 100 (Notable)
Hetch Hetchy	United States	Record daily snowfall	27.9 cm (11.0 in)	39 of 100 (Notable)
Ely AP	United States	Record low minimum temperature	-17.8 C (0.0 F)	39 of 100 (Notable)
Chamarajnagar	India	Record daily precipitation	94.0 mm (3.7 in)	37 of 100 (Notable)
Rajampet	India	Record daily precipitation	31.1 mm (1.2 in)	36 of 100 (Notable)
Cumbam	India	Record daily precipitation	37.1 mm (1.5 in)	36 of 100 (Notable)
Huntington Lake	United States	Record daily snowfall	50.8 cm (20.0 in)	36 of 100 (Notable)
Kent	United States	Record daily snowfall	20.3 cm (8.0 in)	35 of 100 (Notable)
Morgan 3 NE	United States	Record daily precipitation	25.1 mm (1.0 in)	35 of 100 (Notable)
Amarapuram	India	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Parur	India	Record daily precipitation	84.3 mm (3.3 in)	34 of 100 (Routine)
Cedarville	United States	Record low maximum temperature	3.3 C (37.9 F)	34 of 100 (Routine)
Deseret	United States	Record daily snowfall	10.2 cm (4.0 in)	34 of 100 (Routine)
Hetch Hetchy	United States	Record daily precipitation	28.7 mm (1.1 in)	33 of 100 (Routine)
Lewiston	United States	Record daily snowfall	16.5 cm (6.5 in)	33 of 100 (Routine)
Fredonia	United States	Record high maximum temperature	35.6 C (96.1 F)	32 of 100 (Routine)
Cedarville	United States	Record low minimum temperature	-6.7 C (19.9 F)	31 of 100 (Routine)
Nevada City	United States	Record low maximum temperature	4.4 C (39.9 F)	31 of 100 (Routine)
Montpelier Rs	United States	Record snow depth	12.7 cm (5.0 in)	31 of 100 (Routine)
Mt Vernon 3 SW	United States	Record high maximum temperature	31.7 C (89.1 F)	31 of 100 (Routine)
Marion	United States	Record high maximum temperature	33.3 C (91.9 F)	31 of 100 (Routine)
Orman Dam	United States	Record daily snowfall	8.9 cm (3.5 in)	31 of 100 (Routine)
Squirrel Inn 2	United States	Record daily precipitation	64.8 mm (2.6 in)	30 of 100 (Routine)
Paducah	United States	Record high minimum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Neosho	United States	Record high maximum temperature	32.2 C (90.0 F)	30 of 100 (Routine)
Moro	United States	Record low maximum temperature	2.8 C (37.0 F)	30 of 100 (Routine)
Wubin	Australia	Record daily precipitation	25.7 mm (1.0 in)	29 of 100 (Routine)
Huzurabad(Rev)	India	Record daily precipitation	66.1 mm (2.6 in)	29 of 100 (Routine)
Giant Forest	United States	Record daily precipitation	47.8 mm (1.9 in)	29 of 100 (Routine)
Piedra	United States	Record daily precipitation	32.3 mm (1.3 in)	29 of 100 (Routine)
Santa Cruz	United States	Record low minimum temperature	-0.6 C (30.9 F)	29 of 100 (Routine)
Clayton 1 SSW	United States	Record high maximum temperature	31.7 C (89.1 F)	29 of 100 (Routine)
Sedan	United States	Record high maximum temperature	34.4 C (93.9 F)	29 of 100 (Routine)
Jiggs 3 N	United States	Record daily snowfall	10.2 cm (4.0 in)	29 of 100 (Routine)
Mescalero	United States	Record low minimum temperature	-10.0 C (14.0 F)	29 of 100 (Routine)
Antelope 6 SSW	United States	Record daily snowfall	16.5 cm (6.5 in)	29 of 100 (Routine)
Asheville	United States	Record high maximum temperature	30.0 C (86.0 F)	29 of 100 (Routine)
Pocahontas 1	United States	Record high maximum temperature	31.7 C (89.1 F)	28 of 100 (Routine)
Ft Bidwell	United States	Record low minimum temperature	-7.8 C (18.0 F)	28 of 100 (Routine)
Livermore	United States	Record low maximum temperature	10.0 C (50.0 F)	28 of 100 (Routine)
N Fk Rs	United States	Record daily precipitation	38.1 mm (1.5 in)	28 of 100 (Routine)
Independence	United States	Record high maximum temperature	32.8 C (91.0 F)	28 of 100 (Routine)
Yates Ctr	United States	Record high maximum temperature	33.3 C (91.9 F)	28 of 100 (Routine)
Forsyth 2 E	United States	Record low maximum temperature	1.7 C (35.1 F)	28 of 100 (Routine)
McGill	United States	Record snow depth	12.7 cm (5.0 in)	28 of 100 (Routine)
Bowman	United States	Record snow depth	10.2 cm (4.0 in)	28 of 100 (Routine)
Cloud Chief 2 SE	United States	Record high minimum temperature	22.2 C (72.0 F)	28 of 100 (Routine)
Santuck	United States	Record high maximum temperature	32.8 C (91.0 F)	28 of 100 (Routine)
Riverton	United States	Record daily snowfall	15.2 cm (6.0 in)	28 of 100 (Routine)

Counts by Type and Timescale

778 records

Records set or tied on 21 April 1963 by type: Highest daily maximum 194, Lowest daily maximum 177, Highest daily minimum 74, Lowest daily minimum 72, Heaviest daily rainfall 184, Heaviest daily snowfall 62, Deepest snow cover 15.

Records on 21 April 1963 by type
Record type	Records
Highest daily maximum	194
Lowest daily maximum	177
Highest daily minimum	74
Lowest daily minimum	72
Heaviest daily rainfall	184
Heaviest daily snowfall	62
Deepest snow cover	15

Records on 21 April 1963 by timescale: all-time 0, monthly 27, daily 751.

How Much Records Were Beaten By

616 broken records

Margins by which the 616 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 381.0. Ties are not counted.

Top 20 by Significance

21 April 1963

Top 20 records on 21 April 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1963	Nalgonda, IN	daily rain	61.0 mm (2.4 in)	54.9 mm (2.2 in)	57 years	63 of 100 (Major)
21 April 1963	Hetch Hetchy, US	daily snow depth	38.1 cm (15.0 in)	38.1 cm (15.0 in)	52 years	60 of 100 (Major)
21 April 1963	Coalville, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	68 years	55 of 100 (Notable)
21 April 1963	Austin 3 S, US	daily snowfall	15.2 cm (6.0 in)	13.9 cm (5.5 in)	25 years	52 of 100 (Notable)
21 April 1963	Ninghan Station, AU	daily rain	39.4 mm (1.6 in)	37.4 mm (1.5 in)	24 years	50 of 100 (Notable)
21 April 1963	Lovell, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	64 years	46 of 100 (Notable)
21 April 1963	Karloning, AU	daily rain	46.2 mm (1.8 in)	37.6 mm (1.5 in)	5 years	44 of 100 (Notable)
21 April 1963	Gillette 3SE, US	daily snowfall	14.5 cm (5.7 in)	10.7 cm (4.2 in)	60 years	43 of 100 (Notable)
21 April 1963	Grace, US	daily snowfall	12.7 cm (5.0 in)	11.4 cm (4.5 in)	28 years	42 of 100 (Notable)
21 April 1963	Pioche, US	daily snowfall	10.2 cm (4.0 in)	7.7 cm (3.0 in)	72 years	40 of 100 (Notable)
21 April 1963	Worland, US	daily snowfall	12.7 cm (5.0 in)	12.2 cm (4.8 in)	25 years	40 of 100 (Notable)
21 April 1963	Towan, AU	monthly rain	40.9 mm (1.6 in)	5.8 mm (0.23 in)	49 years	39 of 100 (Notable)
21 April 1963	Hetch Hetchy, US	daily snowfall	27.9 cm (11.0 in)	22.8 cm (9.0 in)	18 years	39 of 100 (Notable)
21 April 1963	Ely AP, US	monthly low min	-17.8 C (0.0 F)	1.7 C (3.1 F)	62 years	39 of 100 (Notable)
21 April 1963	Chamarajnagar, IN	monthly rain	94.0 mm (3.7 in)	12.7 mm (0.5 in)	43 years	37 of 100 (Notable)
21 April 1963	Rajampet, IN	daily rain	31.1 mm (1.2 in)	26.8 mm (1.1 in)	30 years	36 of 100 (Notable)
21 April 1963	Cumbam, IN	daily rain	37.1 mm (1.5 in)	35.1 mm (1.4 in)	28 years	36 of 100 (Notable)
21 April 1963	Huntington Lake, US	daily snowfall	50.8 cm (20.0 in)	25.4 cm (10.0 in)	37 years	36 of 100 (Notable)
21 April 1963	Kent, US	monthly snowfall	20.3 cm (8.0 in)	9.1 cm (3.6 in)	13 years	35 of 100 (Notable)
21 April 1963	Morgan 3 NE, US	monthly rain	25.1 mm (1.0 in)	5.3 mm (0.21 in)	19 years	35 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

1793 to 1963

Records set or tied on this calendar date in each year from 1793 to 1963. 1963 had 778 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 1963-04-21: 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 50	576
50 to 100	27
100 to 150	9
150 to 200	1
200 to 250	1
250 to 300	1
300 to 350	0
350 to 400	1