Weather Records on 21 August 1966

661 weather records were set or tied worldwide on 21 August 1966. Highest significance: Kenton, US.

Key Facts for 21 August 1966

On 21 August 1966, 661 weather records were set or tied at long-record stations worldwide.
50 were record highs and 368 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 37 monthly and 624 daily.
Kenton set a daily record precipitation of 67.8 mm (2.7 in) on 21 August 1966.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 449 records.

Record Map

661 stations

661 station records on 21 August 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kenton	United States	Record daily precipitation	67.8 mm (2.7 in)	60 of 100 (Major)
Nidamangalam	India	Record daily precipitation	155.1 mm (6.1 in)	55 of 100 (Notable)
Grundy Ctr	United States	Record daily precipitation	127.0 mm (5.0 in)	53 of 100 (Notable)
Independence #1	United States	Record daily precipitation	84.3 mm (3.3 in)	53 of 100 (Notable)
Chettikulam	India	Record daily precipitation	86.0 mm (3.4 in)	52 of 100 (Notable)
Hot Springs 1 NNE	United States	Record daily precipitation	70.9 mm (2.8 in)	51 of 100 (Notable)
Leitchfield 2 N	United States	Record daily precipitation	95.5 mm (3.8 in)	50 of 100 (Notable)
Iowa Falls	United States	Record daily precipitation	62.2 mm (2.4 in)	49 of 100 (Notable)
Sandgate Post Office	Australia	Record daily precipitation	52.6 mm (2.1 in)	48 of 100 (Notable)
Sunnybank Bowls Club	Australia	Record daily precipitation	49.3 mm (1.9 in)	47 of 100 (Notable)
Minneapolis	United States	Record daily precipitation	135.9 mm (5.4 in)	47 of 100 (Notable)
Killdeer 8 NW	United States	Record daily precipitation	52.3 mm (2.1 in)	47 of 100 (Notable)
Kattumannarkoil	India	Record daily precipitation	143.0 mm (5.6 in)	46 of 100 (Notable)
Kampur	India	Record daily precipitation	104.0 mm (4.1 in)	45 of 100 (Notable)
Watford City	United States	Record daily precipitation	40.9 mm (1.6 in)	45 of 100 (Notable)
Watersmeet	United States	Record daily precipitation	40.6 mm (1.6 in)	44 of 100 (Notable)
Tagus	United States	Record daily precipitation	43.7 mm (1.7 in)	43 of 100 (Notable)
Hayward Rs	United States	Record daily precipitation	71.9 mm (2.8 in)	43 of 100 (Notable)
Jingi Jingi	Australia	Record daily precipitation	51.3 mm (2.0 in)	42 of 100 (Notable)
Ariyalur	India	Record daily precipitation	113.0 mm (4.4 in)	42 of 100 (Notable)
Hull	United Kingdom	Record daily precipitation	27.7 mm (1.1 in)	41 of 100 (Notable)
Findlay Wpcc	United States	Record daily precipitation	42.4 mm (1.7 in)	41 of 100 (Notable)
Flambeau Rsvr	United States	Record daily precipitation	74.2 mm (2.9 in)	41 of 100 (Notable)
Lancaster 4 WSW	United States	Record daily precipitation	114.3 mm (4.5 in)	41 of 100 (Notable)
Saint John	Canada	Record low minimum temperature	6.7 C (44.1 F)	40 of 100 (Notable)
Chandragiri	India	Record daily precipitation	73.2 mm (2.9 in)	40 of 100 (Notable)
Haswell	United States	Record daily precipitation	62.5 mm (2.5 in)	40 of 100 (Notable)
Enka	United States	Record daily precipitation	47.0 mm (1.9 in)	40 of 100 (Notable)
Lares	Puerto Rico [United States]	Record daily precipitation	63.5 mm (2.5 in)	39 of 100 (Notable)
Enterprise	United States	Record daily precipitation	40.6 mm (1.6 in)	39 of 100 (Notable)
Richardton Abbey	United States	Record daily precipitation	32.8 mm (1.3 in)	39 of 100 (Notable)
Rest Lake	United States	Record daily precipitation	61.5 mm (2.4 in)	39 of 100 (Notable)
Charters Towers Post Office	Australia	Record high minimum temperature	20.1 C (68.2 F)	38 of 100 (Notable)
Hull	United Kingdom	Record daily precipitation	27.7 mm (1.1 in)	38 of 100 (Notable)
Independence	United States	Record daily precipitation	110.5 mm (4.4 in)	38 of 100 (Notable)
Pocahontas	United States	Record daily precipitation	62.7 mm (2.5 in)	38 of 100 (Notable)
Richfield	United States	Record daily precipitation	48.3 mm (1.9 in)	38 of 100 (Notable)
Park Rapids Muni AP	United States	Record low maximum temperature	12.8 C (55.0 F)	38 of 100 (Notable)
Adrian 2 NNE	United States	Record daily precipitation	53.1 mm (2.1 in)	37 of 100 (Notable)
Tioga 1E	United States	Record daily precipitation	30.5 mm (1.2 in)	37 of 100 (Notable)
Wadena 3 S	United States	Record low maximum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
S Bend AP	United States	Record daily precipitation	87.9 mm (3.5 in)	36 of 100 (Notable)
Jalpaiguri	India	Record daily precipitation	181.4 mm (7.1 in)	35 of 100 (Notable)
Cambridge Niab	United Kingdom	Record daily precipitation	29.7 mm (1.2 in)	35 of 100 (Notable)
Wynne	United States	Record daily precipitation	50.3 mm (2.0 in)	35 of 100 (Notable)
Centralia	United States	Record daily precipitation	68.6 mm (2.7 in)	35 of 100 (Notable)
Little Falls 2NNE	United States	Record low maximum temperature	13.3 C (55.9 F)	35 of 100 (Notable)
Pine Rvr Dam	United States	Record low maximum temperature	12.8 C (55.0 F)	35 of 100 (Notable)
Wheaton	United States	Record low maximum temperature	13.3 C (55.9 F)	35 of 100 (Notable)
Crow Agency	United States	Record low maximum temperature	16.1 C (61.0 F)	35 of 100 (Notable)
Culbertson	United States	Record low maximum temperature	12.8 C (55.0 F)	35 of 100 (Notable)
Friend 3E	United States	Record daily precipitation	73.7 mm (2.9 in)	35 of 100 (Notable)
Towner 2 NE	United States	Record daily precipitation	25.1 mm (1.0 in)	35 of 100 (Notable)
Cordova AP	United States	Record daily precipitation	112.0 mm (4.4 in)	35 of 100 (Notable)
Tanjavur	India	Record daily precipitation	81.5 mm (3.2 in)	34 of 100 (Routine)
Amity	United States	Record daily precipitation	97.8 mm (3.9 in)	34 of 100 (Routine)
New Salem 5NW	United States	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Ramnagar	India	Record daily precipitation	80.0 mm (3.1 in)	33 of 100 (Routine)
Sirkali	India	Record daily precipitation	83.0 mm (3.3 in)	33 of 100 (Routine)
Lake Park 3SSE	United States	Record daily precipitation	35.3 mm (1.4 in)	33 of 100 (Routine)

Counts by Type and Timescale

661 records

Records set or tied on 21 August 1966 by type: Highest daily maximum 17, Lowest daily maximum 287, Highest daily minimum 33, Lowest daily minimum 81, Heaviest daily rainfall 243.

Records on 21 August 1966 by type
Record type	Records
Highest daily maximum	17
Lowest daily maximum	287
Highest daily minimum	33
Lowest daily minimum	81
Heaviest daily rainfall	243
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1966 by timescale: all-time 0, monthly 37, daily 624.

How Much Records Were Beaten By

558 broken records

Margins by which the 558 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 96.3. Ties are not counted.

Top 20 by Significance

21 August 1966

Top 20 records on 21 August 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1966	Kenton, US	daily rain	67.8 mm (2.7 in)	40.6 mm (1.6 in)	52 years	60 of 100 (Major)
21 August 1966	Nidamangalam, IN	monthly rain	155.1 mm (6.1 in)	39.3 mm (1.5 in)	56 years	55 of 100 (Notable)
21 August 1966	Grundy Ctr, US	daily rain	127.0 mm (5.0 in)	96.3 mm (3.8 in)	20 years	53 of 100 (Notable)
21 August 1966	Independence #1, US	monthly rain	84.3 mm (3.3 in)	8.1 mm (0.32 in)	93 years	53 of 100 (Notable)
21 August 1966	Chettikulam, IN	daily rain	86.0 mm (3.4 in)	58.6 mm (2.3 in)	60 years	52 of 100 (Notable)
21 August 1966	Hot Springs 1 NNE, US	daily rain	70.9 mm (2.8 in)	35.3 mm (1.4 in)	73 years	51 of 100 (Notable)
21 August 1966	Leitchfield 2 N, US	daily rain	95.5 mm (3.8 in)	35.8 mm (1.4 in)	57 years	50 of 100 (Notable)
21 August 1966	Iowa Falls, US	daily rain	62.2 mm (2.4 in)	33.0 mm (1.3 in)	69 years	49 of 100 (Notable)
21 August 1966	Sandgate Post Office, AU	daily rain	52.6 mm (2.1 in)	29.7 mm (1.2 in)	55 years	48 of 100 (Notable)
21 August 1966	Sunnybank Bowls Club, AU	daily rain	49.3 mm (1.9 in)	32.3 mm (1.3 in)	36 years	47 of 100 (Notable)
21 August 1966	Minneapolis, US	monthly rain	135.9 mm (5.4 in)	34.3 mm (1.4 in)	32 years	47 of 100 (Notable)
21 August 1966	Killdeer 8 NW, US	daily rain	52.3 mm (2.1 in)	44.7 mm (1.8 in)	1 year	47 of 100 (Notable)
21 August 1966	Kattumannarkoil, IN	monthly rain	143.0 mm (5.6 in)	45.5 mm (1.8 in)	11 years	46 of 100 (Notable)
21 August 1966	Kampur, IN	daily rain	104.0 mm (4.1 in)	63.4 mm (2.5 in)	13 years	45 of 100 (Notable)
21 August 1966	Watford City, US	daily rain	40.9 mm (1.6 in)	33.8 mm (1.3 in)	3 years	45 of 100 (Notable)
21 August 1966	Watersmeet, US	daily rain	40.6 mm (1.6 in)	24.9 mm (1.0 in)	55 years	44 of 100 (Notable)
21 August 1966	Tagus, US	daily rain	43.7 mm (1.7 in)	23.9 mm (0.9 in)	36 years	43 of 100 (Notable)
21 August 1966	Hayward Rs, US	daily rain	71.9 mm (2.8 in)	24.9 mm (1.0 in)	61 years	43 of 100 (Notable)
21 August 1966	Jingi Jingi, AU	monthly rain	51.3 mm (2.0 in)	17.5 mm (0.7 in)	12 years	42 of 100 (Notable)
21 August 1966	Ariyalur, IN	daily rain	113.0 mm (4.4 in)	60.9 mm (2.4 in)	40 years	42 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

1800 to 1966

Records set or tied on this calendar date in each year from 1800 to 1966. 1966 had 661 records.

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

Records on 08-21 in each year
Year	Records
1800	1
1802	1
1804	1
1807	1
1816	1
1818	1
1832	1
1834	1
1839	3
1843	1
1847	1
1849	3
1850	1
1851	2
1863	1
1866	1
1867	2
1870	3
1871	2
1872	1
1873	1
1876	1
1877	2
1879	2
1884	2
1885	5
1886	1
1887	5
1888	2
1889	3
1890	4
1891	2
1893	4
1894	8
1895	3
1896	2
1897	4
1898	4
1899	7
1900	4
1901	9
1902	8
1903	6
1904	8
1905	4
1906	22
1907	20
1908	13
1909	17
1910	33
1911	19
1912	50
1913	37
1914	24
1915	21
1916	106
1917	101
1918	202
1919	19
1920	59
1921	34
1922	58
1923	111
1924	135
1925	220
1926	227
1927	228
1928	110
1929	234
1930	297
1931	277
1932	264
1933	328
1934	320
1935	318
1936	807
1937	762
1938	239
1939	630
1940	683
1941	180
1942	415
1943	438
1944	346
1945	544
1946	390
1947	954
1948	305
1949	508
1950	958
1951	699
1952	368
1953	331
1954	497
1955	885
1956	701
1957	490
1958	389
1959	704
1960	490
1961	644
1962	469
1963	338
1964	794
1965	455
1966	661
1967	541
1968	1,014
1969	650
1970	373
1971	660
1972	441
1973	438
1974	564
1975	545
1976	756
1977	764
1978	445
1979	778
1980	904
1981	1,015
1982	769
1983	1,407
1984	975
1985	623
1986	1,166
1987	740
1988	889
1989	828
1990	910
1991	828
1992	957
1993	698
1994	968
1995	962
1996	950
1997	1,291
1998	948
1999	717
2000	861
2001	797
2002	965
2003	1,241
2004	1,585
2005	1,071
2006	797
2007	1,829
2008	1,012
2009	1,319
2010	1,155
2011	1,022
2012	990
2013	513
2014	624
2015	651
2016	890
2017	347
2018	816
2019	631
2020	1,147
2021	767
2022	917
2023	1,826
2024	777
2025	1,230
2026	1,289

Download the Data

Data for records on 1966-08-21: 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	502
20 to 40	46
40 to 60	7
60 to 80	2
80 to 100	1