Weather Records on 21 September 1964

374 weather records were set or tied worldwide on 21 September 1964. Highest significance: Grapevine Dam, US.

Key Facts for 21 September 1964

On 21 September 1964, 374 weather records were set or tied at long-record stations worldwide.
43 were record highs and 114 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 2 monthly and 369 daily.
Grapevine Dam set an all-time record daily precipitation of 219.5 mm (8.6 in) on 21 September 1964.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 451 records.

Record Map

374 stations

374 station records on 21 September 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Grapevine Dam	United States	Record daily precipitation	219.5 mm (8.6 in)	70 of 100 (Major)
McKinney Muni AP	United States	Record daily precipitation	307.3 mm (12.1 in)	67 of 100 (Major)
Carrollton	United States	Record daily precipitation	265.9 mm (10.5 in)	65 of 100 (Major)
Dublin 2SE	United States	Record daily precipitation	111.3 mm (4.4 in)	61 of 100 (Major)
Brackettville	United States	Record daily precipitation	97.8 mm (3.9 in)	55 of 100 (Notable)
Stornoway Airport	United Kingdom	Record low minimum temperature	-0.4 C (31.3 F)	46 of 100 (Notable)
Oswego 1 N	United States	Record daily precipitation	53.3 mm (2.1 in)	46 of 100 (Notable)
Trangie Post Office	Australia	Record daily precipitation	33.0 mm (1.3 in)	45 of 100 (Notable)
Jerrys Plains Post Office	Australia	Record daily precipitation	25.7 mm (1.0 in)	44 of 100 (Notable)
Narromine (Mumble Peg)	Australia	Record daily precipitation	32.5 mm (1.3 in)	43 of 100 (Notable)
Gilgandra (Chelmsford Ave)	Australia	Record daily precipitation	27.4 mm (1.1 in)	43 of 100 (Notable)
Sheboygan	United States	Record daily precipitation	52.8 mm (2.1 in)	43 of 100 (Notable)
Mehmedabad	India	Record daily precipitation	114.3 mm (4.5 in)	41 of 100 (Notable)
Mantova	Italy	Record daily precipitation	26.6 mm (1.0 in)	40 of 100 (Notable)
Burnet	United States	Record daily precipitation	50.8 mm (2.0 in)	39 of 100 (Notable)
Zugspitze	Germany	Record daily precipitation	50.9 mm (2.0 in)	38 of 100 (Notable)
Comanche	United States	Record daily precipitation	55.9 mm (2.2 in)	38 of 100 (Notable)
Trangie Research Station AWS	Australia	Record daily precipitation	25.4 mm (1.0 in)	37 of 100 (Notable)
Pimpelner	India	Record daily precipitation	72.6 mm (2.9 in)	37 of 100 (Notable)
Broach	India	Record daily precipitation	82.0 mm (3.2 in)	36 of 100 (Notable)
Cambay	India	Record daily precipitation	54.6 mm (2.1 in)	36 of 100 (Notable)
Byad	India	Record daily precipitation	87.0 mm (3.4 in)	36 of 100 (Notable)
Hobart 2 WNW	United States	Record daily precipitation	88.1 mm (3.5 in)	36 of 100 (Notable)
McAlester Rgnl AP	United States	Record daily precipitation	57.7 mm (2.3 in)	36 of 100 (Notable)
Neilrex (Caigan)	Australia	Record daily precipitation	25.4 mm (1.0 in)	34 of 100 (Routine)
Pilot Point Isl du Boi	United States	Record daily precipitation	71.4 mm (2.8 in)	34 of 100 (Routine)
Singleton Post Office	Australia	Record daily precipitation	25.1 mm (1.0 in)	33 of 100 (Routine)
St Andrews	Canada	Record low minimum temperature	2.8 C (37.0 F)	32 of 100 (Routine)
Kaira	India	Record daily precipitation	72.0 mm (2.8 in)	32 of 100 (Routine)
Navapur	India	Record daily precipitation	120.0 mm (4.7 in)	32 of 100 (Routine)
Modasa	India	Record daily precipitation	107.0 mm (4.2 in)	31 of 100 (Routine)
Irapuato	Mexico	Record daily precipitation	38.9 mm (1.5 in)	31 of 100 (Routine)
Tropic	United States	Record low maximum temperature	12.2 C (54.0 F)	31 of 100 (Routine)
Iguala (Smn)	Mexico	Record daily precipitation	63.2 mm (2.5 in)	30 of 100 (Routine)
Juana Diaz Camp	Puerto Rico [United States]	Record low maximum temperature	28.3 C (82.9 F)	30 of 100 (Routine)
Brady	United States	Record daily precipitation	37.8 mm (1.5 in)	30 of 100 (Routine)
Tahoka	United States	Record low maximum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Throckmorton	United States	Record low maximum temperature	19.4 C (66.9 F)	30 of 100 (Routine)
Cet Central England	United Kingdom	Record low minimum temperature	2.2 C (36.0 F)	29 of 100 (Routine)
Troicko-Pecherskoe	Russia	Record high minimum temperature	10.4 C (50.7 F)	28 of 100 (Routine)
Blagovescensk	Russia	Record low maximum temperature	5.8 C (42.4 F)	28 of 100 (Routine)
Olga 2 SE	United States	Record low maximum temperature	11.7 C (53.1 F)	28 of 100 (Routine)
Cassilis (Dalkeith)	Australia	Record daily precipitation	26.9 mm (1.1 in)	27 of 100 (Routine)
Jambusar	India	Record daily precipitation	87.6 mm (3.4 in)	27 of 100 (Routine)
Artesia 6S	United States	Record low maximum temperature	18.3 C (64.9 F)	27 of 100 (Routine)
Hereford	United States	Record low maximum temperature	15.0 C (59.0 F)	27 of 100 (Routine)
Lamesa 1 SSE	United States	Record low maximum temperature	17.2 C (63.0 F)	27 of 100 (Routine)
Uruapan (Smn)	Mexico	Record daily precipitation	70.9 mm (2.8 in)	26 of 100 (Routine)
Plainview	United States	Record low maximum temperature	16.1 C (61.0 F)	26 of 100 (Routine)
Mourilyan Post Office	Australia	Record daily precipitation	35.1 mm (1.4 in)	25 of 100 (Routine)
Del Norte 3ENE	United States	Record low maximum temperature	13.9 C (57.0 F)	25 of 100 (Routine)
Baldwin	United States	Record daily precipitation	52.3 mm (2.1 in)	25 of 100 (Routine)
Cassilis Post Office	Australia	Record daily precipitation	25.7 mm (1.0 in)	24 of 100 (Routine)
Jalpaiguri	India	Record daily precipitation	116.6 mm (4.6 in)	24 of 100 (Routine)
Francisco I. Madero	Mexico	Record daily precipitation	41.9 mm (1.6 in)	24 of 100 (Routine)
Vladivostok	Russia	Record low maximum temperature	12.0 C (53.6 F)	24 of 100 (Routine)
Seymour 3NW	United States	Record low maximum temperature	21.1 C (70.0 F)	24 of 100 (Routine)
New Westminster	Canada	Record daily precipitation	34.0 mm (1.3 in)	23 of 100 (Routine)
Indio Fire STN	United States	Record low minimum temperature	13.3 C (55.9 F)	23 of 100 (Routine)
Houston	United States	Record high minimum temperature	20.6 C (69.1 F)	23 of 100 (Routine)

Counts by Type and Timescale

374 records

Records set or tied on 21 September 1964 by type: Highest daily maximum 11, Lowest daily maximum 80, Highest daily minimum 32, Lowest daily minimum 34, Heaviest daily rainfall 215, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 21 September 1964 by type
Record type	Records
Highest daily maximum	11
Lowest daily maximum	80
Highest daily minimum	32
Lowest daily minimum	34
Heaviest daily rainfall	215
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 21 September 1964 by timescale: all-time 3, monthly 2, daily 369.

How Much Records Were Beaten By

310 broken records

Margins by which the 310 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 115.5. Ties are not counted.

Top 20 by Significance

21 September 1964

Top 20 records on 21 September 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1964	Grapevine Dam, US	all-time rain	219.5 mm (8.6 in)	83.4 mm (3.3 in)	14 years	70 of 100 (Major)
21 September 1964	McKinney Muni AP, US	all-time rain	307.3 mm (12.1 in)	115.5 mm (4.5 in)	4 years	67 of 100 (Major)
21 September 1964	Carrollton, US	all-time rain	265.9 mm (10.5 in)	68.8 mm (2.7 in)	15 years	65 of 100 (Major)
21 September 1964	Dublin 2SE, US	daily rain	111.3 mm (4.4 in)	78.3 mm (3.1 in)	50 years	61 of 100 (Major)
21 September 1964	Brackettville, US	daily rain	97.8 mm (3.9 in)	67.3 mm (2.6 in)	57 years	55 of 100 (Notable)
21 September 1964	Stornoway Airport, GB	monthly low min	-0.4 C (31.3 F)	0.4 C (0.7 F)	89 years	46 of 100 (Notable)
21 September 1964	Oswego 1 N, US	daily rain	53.3 mm (2.1 in)	38.1 mm (1.5 in)	62 years	46 of 100 (Notable)
21 September 1964	Trangie Post Office, AU	daily rain	33.0 mm (1.3 in)	24.6 mm (1.0 in)	24 years	45 of 100 (Notable)
21 September 1964	Jerrys Plains Post Office, AU	daily rain	25.7 mm (1.0 in)	16.8 mm (0.7 in)	64 years	44 of 100 (Notable)
21 September 1964	Narromine (Mumble Peg), AU	daily rain	32.5 mm (1.3 in)	10.9 mm (0.4 in)	73 years	43 of 100 (Notable)
21 September 1964	Gilgandra (Chelmsford Ave), AU	daily rain	27.4 mm (1.1 in)	14.2 mm (0.6 in)	72 years	43 of 100 (Notable)
21 September 1964	Sheboygan, US	daily rain	52.8 mm (2.1 in)	27.4 mm (1.1 in)	53 years	43 of 100 (Notable)
21 September 1964	Mehmedabad, IN	daily rain	114.3 mm (4.5 in)	80.8 mm (3.2 in)	36 years	41 of 100 (Notable)
21 September 1964	Mantova, IT	daily rain	26.6 mm (1.0 in)	2.1 mm (0.08 in)	95 years	40 of 100 (Notable)
21 September 1964	Burnet, US	daily rain	50.8 mm (2.0 in)	33.5 mm (1.3 in)	64 years	39 of 100 (Notable)
21 September 1964	Zugspitze, DE	daily rain	50.9 mm (2.0 in)	26.9 mm (1.1 in)	6 years	38 of 100 (Notable)
21 September 1964	Comanche, US	daily rain	55.9 mm (2.2 in)	50.6 mm (2.0 in)	32 years	38 of 100 (Notable)
21 September 1964	Trangie Research Station AWS, AU	daily rain	25.4 mm (1.0 in)	18.8 mm (0.7 in)	24 years	37 of 100 (Notable)
21 September 1964	Pimpelner, IN	daily rain	72.6 mm (2.9 in)	46.4 mm (1.8 in)	24 years	37 of 100 (Notable)
21 September 1964	Broach, IN	daily rain	82.0 mm (3.2 in)	35.8 mm (1.4 in)	62 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

1805 to 1964

Records set or tied on this calendar date in each year from 1805 to 1964. 1964 had 374 records.

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

Records on 09-21 in each year
Year	Records
1805	1
1812	1
1825	2
1840	1
1841	1
1842	1
1848	1
1854	1
1856	2
1868	1
1872	2
1873	1
1877	1
1878	1
1881	1
1882	1
1884	1
1886	1
1888	2
1889	1
1891	10
1892	1
1893	10
1894	2
1895	3
1896	2
1897	6
1898	6
1899	3
1900	2
1901	5
1902	5
1903	8
1904	20
1905	12
1906	17
1907	10
1908	17
1909	10
1910	8
1911	18
1912	26
1913	37
1914	29
1915	34
1916	48
1917	28
1918	43
1919	54
1920	29
1921	64
1922	35
1923	232
1924	291
1925	278
1926	178
1927	165
1928	81
1929	232
1930	82
1931	681
1932	242
1933	193
1934	492
1935	199
1936	329
1937	487
1938	508
1939	308
1940	908
1941	416
1942	291
1943	407
1944	413
1945	507
1946	176
1947	534
1948	301
1949	298
1950	334
1951	241
1952	430
1953	382
1954	453
1955	752
1956	1,100
1957	366
1958	588
1959	513
1960	418
1961	441
1962	1,085
1963	306
1964	374
1965	1,088
1966	565
1967	577
1968	790
1969	593
1970	708
1971	645
1972	599
1973	421
1974	652
1975	528
1976	694
1977	918
1978	818
1979	736
1980	990
1981	696
1982	1,484
1983	2,207
1984	707
1985	796
1986	671
1987	965
1988	557
1989	1,002
1990	716
1991	1,021
1992	752
1993	911
1994	713
1995	2,002
1996	1,233
1997	1,112
1998	1,481
1999	1,025
2000	884
2001	718
2002	696
2003	959
2004	888
2005	1,143
2006	920
2007	742
2008	740
2009	715
2010	1,290
2011	542
2012	595
2013	769
2014	716
2015	565
2016	989
2017	1,178
2018	1,051
2019	833
2020	580
2021	465
2022	1,049
2023	783
2024	470
2025	588
2026	469

Download the Data

Data for records on 1964-09-21: 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 20	274
20 to 40	24
40 to 60	5
60 to 80	4
80 to 100	2
100 to 120	1