Weather Records on 21 July 1963

470 weather records were set or tied worldwide on 21 July 1963. Highest significance: Denman Island, CA.

Key Facts for 21 July 1963

On 21 July 1963, 470 weather records were set or tied at long-record stations worldwide.
131 were record highs and 50 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 463 daily.
Denman Island set a daily record precipitation of 26.9 mm (1.1 in) on 21 July 1963.
Across 159 earlier years (1794 to 2026) the same calendar date averaged 467 records.

Record Map

470 stations

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

Weather records on 21 July 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Denman Island	Canada	Record daily precipitation	26.9 mm (1.1 in)	61 of 100 (Major)
Tot-Ma	Russia	Record daily precipitation	39.4 mm (1.6 in)	58 of 100 (Notable)
Bear Creek	Canada	Record daily precipitation	46.2 mm (1.8 in)	49 of 100 (Notable)
Helena	United States	Record daily precipitation	88.9 mm (3.5 in)	47 of 100 (Notable)
Kappawanta	Australia	Record daily precipitation	35.3 mm (1.4 in)	46 of 100 (Notable)
Quincy Exp STN	United States	Record daily precipitation	89.9 mm (3.5 in)	46 of 100 (Notable)
Sheringa	Australia	Record daily precipitation	44.2 mm (1.7 in)	45 of 100 (Notable)
Rath	India	Record daily precipitation	144.3 mm (5.7 in)	45 of 100 (Notable)
Stellenbosch (Tnk)	South Africa	Record daily precipitation	57.0 mm (2.2 in)	45 of 100 (Notable)
Blaine	United States	Record daily precipitation	27.2 mm (1.1 in)	43 of 100 (Notable)
Verhneimbatsk	Russia	Record daily precipitation	32.2 mm (1.3 in)	42 of 100 (Notable)
Colton (Boola Boola)	Australia	Record daily precipitation	28.4 mm (1.1 in)	41 of 100 (Notable)
Shillong	India	Record daily precipitation	107.6 mm (4.2 in)	41 of 100 (Notable)
Mount Hope	Australia	Record daily precipitation	26.7 mm (1.1 in)	39 of 100 (Notable)
Lois River Dam	Canada	Record daily precipitation	37.3 mm (1.5 in)	39 of 100 (Notable)
Darjeeling	India	Record daily precipitation	153.8 mm (6.1 in)	39 of 100 (Notable)
Clearwater	United States	Record daily precipitation	39.6 mm (1.6 in)	39 of 100 (Notable)
Rhebokskraal	South Africa	Record daily precipitation	28.0 mm (1.1 in)	38 of 100 (Notable)
Brookhaven City	United States	Record high minimum temperature	26.1 C (79.0 F)	38 of 100 (Notable)
Elliston	Australia	Record daily precipitation	25.1 mm (1.0 in)	35 of 100 (Notable)
Victor Harbor (Rivington Grang	Australia	Record daily precipitation	39.9 mm (1.6 in)	34 of 100 (Routine)
Alouette Lake	Canada	Record daily precipitation	35.8 mm (1.4 in)	34 of 100 (Routine)
Los Gatos	United States	Record low minimum temperature	6.7 C (44.1 F)	34 of 100 (Routine)
Burlington	United States	Record daily precipitation	62.0 mm (2.4 in)	34 of 100 (Routine)
Tropic	United States	Record high minimum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Second Valley (Poolamacca)	Australia	Record daily precipitation	33.8 mm (1.3 in)	31 of 100 (Routine)
Waren	Germany	Record low minimum temperature	6.5 C (43.7 F)	31 of 100 (Routine)
Cheyenne Wells 2NE	United States	Record high minimum temperature	21.7 C (71.1 F)	31 of 100 (Routine)
Blaine	United States	Record low maximum temperature	17.2 C (63.0 F)	31 of 100 (Routine)
Sarajevo	Bosnia and Herzegovina	Record daily precipitation	26.5 mm (1.0 in)	30 of 100 (Routine)
Riksgransen	Sweden	Record daily precipitation	32.7 mm (1.3 in)	30 of 100 (Routine)
Kem-Port	Russia	Record daily precipitation	34.4 mm (1.4 in)	29 of 100 (Routine)
Danger Point - Vrt.	South Africa	Record daily precipitation	42.0 mm (1.7 in)	29 of 100 (Routine)
Garibaldi	Canada	Record daily precipitation	38.4 mm (1.5 in)	28 of 100 (Routine)
Digby	Canada	Record low maximum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Bahadurganj	India	Record daily precipitation	216.0 mm (8.5 in)	28 of 100 (Routine)
Healdton 3 E	United States	Record high maximum temperature	42.2 C (108.0 F)	28 of 100 (Routine)
Bremen-Seefahrtschule	Germany	Record low minimum temperature	7.0 C (44.6 F)	27 of 100 (Routine)
Shimla	India	Record daily precipitation	93.0 mm (3.7 in)	27 of 100 (Routine)
Kizljar	Russia	Record daily precipitation	25.8 mm (1.0 in)	27 of 100 (Routine)
Dulce	United States	Record high minimum temperature	15.6 C (60.1 F)	27 of 100 (Routine)
Crossville Ed & Rsch STN	United States	Record daily precipitation	59.7 mm (2.4 in)	27 of 100 (Routine)
Green Bay	United States	Record daily precipitation	32.0 mm (1.3 in)	27 of 100 (Routine)
Quatsino	Canada	Record daily precipitation	35.6 mm (1.4 in)	26 of 100 (Routine)
Dehra Gopipur	India	Record daily precipitation	60.0 mm (2.4 in)	26 of 100 (Routine)
Farmerville	United States	Record high maximum temperature	37.2 C (99.0 F)	26 of 100 (Routine)
El Reno 1 N	United States	Record high maximum temperature	40.6 C (105.1 F)	26 of 100 (Routine)
Ft Duchesne	United States	Record high minimum temperature	17.8 C (64.0 F)	26 of 100 (Routine)
Manila	United States	Record high minimum temperature	17.2 C (63.0 F)	26 of 100 (Routine)
Brandonville	United States	Record daily precipitation	35.6 mm (1.4 in)	26 of 100 (Routine)
Goondiwindi Post Office	Australia	Record high maximum temperature	25.1 C (77.2 F)	25 of 100 (Routine)
Lebanon (Bos)	South Africa	Record daily precipitation	29.0 mm (1.1 in)	25 of 100 (Routine)
Livermore	United States	Record low minimum temperature	7.2 C (45.0 F)	25 of 100 (Routine)
Madera	United States	Record low minimum temperature	6.7 C (44.1 F)	25 of 100 (Routine)
Kingston	United States	Record daily precipitation	31.0 mm (1.2 in)	25 of 100 (Routine)
Pachena Point	Canada	Record daily precipitation	42.4 mm (1.7 in)	24 of 100 (Routine)
Donaldsonville 4 SW	United States	Record high minimum temperature	25.0 C (77.0 F)	24 of 100 (Routine)
Winnsboro 5 SSE	United States	Record high minimum temperature	25.6 C (78.1 F)	24 of 100 (Routine)
Murphy 4ESE	United States	Record daily precipitation	30.5 mm (1.2 in)	24 of 100 (Routine)
Kolaghat	India	Record daily precipitation	95.0 mm (3.7 in)	23 of 100 (Routine)

Counts by Type and Timescale

470 records

Records set or tied on 21 July 1963 by type: Highest daily maximum 58, Lowest daily maximum 32, Highest daily minimum 73, Lowest daily minimum 18, Heaviest daily rainfall 289.

Records on 21 July 1963 by type
Record type	Records
Highest daily maximum	58
Lowest daily maximum	32
Highest daily minimum	73
Lowest daily minimum	18
Heaviest daily rainfall	289
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 July 1963 by timescale: all-time 0, monthly 7, daily 463.

How Much Records Were Beaten By

375 broken records

Margins by which the 375 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.3. Ties are not counted.

Top 20 by Significance

21 July 1963

Top 20 records on 21 July 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 July 1963	Denman Island, CA	daily rain	26.9 mm (1.1 in)	26.9 mm (1.1 in)	56 years	61 of 100 (Major)
21 July 1963	Tot-Ma, RU	daily rain	39.4 mm (1.6 in)	20.8 mm (0.8 in)	68 years	58 of 100 (Notable)
21 July 1963	Bear Creek, CA	daily rain	46.2 mm (1.8 in)	33.0 mm (1.3 in)	17 years	49 of 100 (Notable)
21 July 1963	Helena, US	daily rain	88.9 mm (3.5 in)	50.8 mm (2.0 in)	26 years	47 of 100 (Notable)
21 July 1963	Kappawanta, AU	daily rain	35.3 mm (1.4 in)	16.2 mm (0.6 in)	45 years	46 of 100 (Notable)
21 July 1963	Quincy Exp STN, US	daily rain	89.9 mm (3.5 in)	52.6 mm (2.1 in)	9 years	46 of 100 (Notable)
21 July 1963	Sheringa, AU	monthly rain	44.2 mm (1.7 in)	15.0 mm (0.6 in)	5 years	45 of 100 (Notable)
21 July 1963	Rath, IN	daily rain	144.3 mm (5.7 in)	46.5 mm (1.8 in)	60 years	45 of 100 (Notable)
21 July 1963	Stellenbosch (Tnk), ZA	daily rain	57.0 mm (2.2 in)	29.3 mm (1.2 in)	29 years	45 of 100 (Notable)
21 July 1963	Blaine, US	daily rain	27.2 mm (1.1 in)	20.6 mm (0.8 in)	17 years	43 of 100 (Notable)
21 July 1963	Verhneimbatsk, RU	daily rain	32.2 mm (1.3 in)	14.2 mm (0.6 in)	42 years	42 of 100 (Notable)
21 July 1963	Colton (Boola Boola), AU	daily rain	28.4 mm (1.1 in)	10.6 mm (0.4 in)	45 years	41 of 100 (Notable)
21 July 1963	Shillong, IN	daily rain	107.6 mm (4.2 in)	65.4 mm (2.6 in)	21 years	41 of 100 (Notable)
21 July 1963	Mount Hope, AU	daily rain	26.7 mm (1.1 in)	15.8 mm (0.6 in)	24 years	39 of 100 (Notable)
21 July 1963	Lois River Dam, CA	daily rain	37.3 mm (1.5 in)	27.1 mm (1.1 in)	14 years	39 of 100 (Notable)
21 July 1963	Darjeeling, IN	daily rain	153.8 mm (6.1 in)	56.3 mm (2.2 in)	48 years	39 of 100 (Notable)
21 July 1963	Clearwater, US	daily rain	39.6 mm (1.6 in)	14.2 mm (0.6 in)	61 years	39 of 100 (Notable)
21 July 1963	Rhebokskraal, ZA	daily rain	28.0 mm (1.1 in)	23.9 mm (0.9 in)	32 years	38 of 100 (Notable)
21 July 1963	Brookhaven City, US	monthly high min	26.1 C (79.0 F)	0.5 C (0.9 F)	62 years	38 of 100 (Notable)
21 July 1963	Elliston, AU	daily rain	25.1 mm (1.0 in)	3.5 mm (0.14 in)	72 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

1794 to 1963

Records set or tied on this calendar date in each year from 1794 to 1963. 1963 had 470 records.

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

Records on 07-21 in each year
Year	Records
1794	1
1795	1
1796	1
1797	1
1813	2
1832	2
1837	1
1839	1
1843	1
1844	2
1854	1
1859	3
1865	3
1868	3
1872	1
1876	1
1879	2
1880	1
1881	1
1884	1
1885	1
1886	2
1888	2
1889	3
1890	2
1892	3
1893	3
1894	3
1895	1
1896	3
1897	4
1898	7
1899	2
1900	6
1901	13
1902	12
1903	10
1904	8
1905	13
1906	13
1907	12
1908	25
1909	18
1910	12
1911	37
1912	52
1913	41
1914	48
1915	81
1916	72
1917	136
1918	130
1919	51
1920	33
1921	55
1922	48
1923	132
1924	286
1925	202
1926	401
1927	191
1928	205
1929	360
1930	521
1931	549
1932	322
1933	208
1934	965
1935	236
1936	322
1937	253
1938	638
1939	415
1940	318
1941	226
1942	318
1943	253
1944	716
1945	300
1946	398
1947	795
1948	403
1949	603
1950	662
1951	427
1952	657
1953	351
1954	656
1955	582
1956	490
1957	447
1958	531
1959	940
1960	651
1961	388
1962	263
1963	470
1964	457
1965	748
1966	626
1967	313
1968	334
1969	636
1970	1,241
1971	475
1972	1,046
1973	871
1974	536
1975	380
1976	477
1977	708
1978	1,155
1979	964
1980	926
1981	1,352
1982	588
1983	1,234
1984	764
1985	554
1986	791
1987	1,025
1988	1,015
1989	973
1990	914
1991	812
1992	1,562
1993	866
1994	773
1995	1,247
1996	1,141
1997	849
1998	1,674
1999	814
2000	1,230
2001	889
2002	990
2003	1,250
2004	694
2005	1,420
2006	1,479
2007	1,145
2008	989
2009	1,306
2010	1,148
2011	1,414
2012	815
2013	526
2014	762
2015	704
2016	645
2017	433
2018	942
2019	755
2020	363
2021	574
2022	866
2023	816
2024	873
2025	881
2026	874

Download the Data

Data for records on 1963-07-21: 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 10	295
10 to 20	60
20 to 30	10
30 to 40	4
40 to 50	1
50 to 60	3
60 to 70	1
70 to 80	1