Weather Records on 21 August 1976

756 weather records were set or tied worldwide on 21 August 1976. Highest significance: Carcross, CA.

Key Facts for 21 August 1976

On 21 August 1976, 756 weather records were set or tied at long-record stations worldwide.
243 were record highs and 272 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 10 monthly and 743 daily.
Carcross set an all-time record daily precipitation of 36.8 mm (1.4 in) on 21 August 1976.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 448 records.

Record Map

756 stations

756 station records on 21 August 1976 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1976: highest significance records shown on the map
Station	Country	Type	Value	Significance
Carcross	Canada	Record daily precipitation	36.8 mm (1.4 in)	60 of 100 (Major)
Southport 5 N	United States	Record daily precipitation	146.8 mm (5.8 in)	57 of 100 (Notable)
Luminarias	Brazil	Record daily precipitation	35.3 mm (1.4 in)	53 of 100 (Notable)
Haileybury	Canada	Record high minimum temperature	25.6 C (78.1 F)	48 of 100 (Notable)
Nizhni Sirohozy	Ukraine	Record daily precipitation	59.9 mm (2.4 in)	46 of 100 (Notable)
Salitre	Brazil	Record daily precipitation	40.0 mm (1.6 in)	45 of 100 (Notable)
Armagh	United Kingdom	Record high maximum temperature	25.1 C (77.2 F)	43 of 100 (Notable)
Waynesboro 2 S	United States	Record low maximum temperature	23.9 C (75.0 F)	43 of 100 (Notable)
Visconde de Maua (Esc.Agrot)	Brazil	Record daily precipitation	27.0 mm (1.1 in)	42 of 100 (Notable)
Monticello 5 SE	United States	Record low minimum temperature	16.1 C (61.0 F)	42 of 100 (Notable)
Woodburn	Australia	Record daily precipitation	25.0 mm (1.0 in)	41 of 100 (Notable)
Kropotkin	Russia	Record daily precipitation	46.3 mm (1.8 in)	41 of 100 (Notable)
Valenca	Brazil	Record daily precipitation	25.6 mm (1.0 in)	40 of 100 (Notable)
Santa Rita Do Jacutinga	Brazil	Record daily precipitation	32.8 mm (1.3 in)	40 of 100 (Notable)
Santa Isabel Do Rio Preto	Brazil	Record daily precipitation	38.0 mm (1.5 in)	39 of 100 (Notable)
Ribeirao de Sao Joaquim	Brazil	Record daily precipitation	32.6 mm (1.3 in)	39 of 100 (Notable)
Volta Redonda	Brazil	Record daily precipitation	41.0 mm (1.6 in)	39 of 100 (Notable)
Barra Mansa	Brazil	Record daily precipitation	33.6 mm (1.3 in)	39 of 100 (Notable)
Stornoway Airport	United Kingdom	Record high maximum temperature	23.0 C (73.4 F)	39 of 100 (Notable)
Melitopol	Ukraine	Record daily precipitation	48.0 mm (1.9 in)	39 of 100 (Notable)
Pedra Selada (Pcd)	Brazil	Record daily precipitation	27.6 mm (1.1 in)	38 of 100 (Notable)
Usina Congonhal	Brazil	Record daily precipitation	28.2 mm (1.1 in)	38 of 100 (Notable)
Atengo (Smn)	Mexico	Record daily precipitation	50.8 mm (2.0 in)	38 of 100 (Notable)
Usina Rio Dos Campos	Brazil	Record daily precipitation	76.9 mm (3.0 in)	37 of 100 (Notable)
Innsbruck	Austria	Record low maximum temperature	13.4 C (56.1 F)	36 of 100 (Notable)
Pentagna	Brazil	Record daily precipitation	25.0 mm (1.0 in)	36 of 100 (Notable)
Ponte Do Souza	Brazil	Record daily precipitation	34.8 mm (1.4 in)	36 of 100 (Notable)
Jonkoping	Sweden	Record low minimum temperature	3.5 C (38.3 F)	36 of 100 (Notable)
Eastport	United States	Record high maximum temperature	30.0 C (86.0 F)	35 of 100 (Notable)
Little Mtn	United States	Record low maximum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Milbank 4 NW	United States	Record high maximum temperature	39.4 C (102.9 F)	35 of 100 (Notable)
Sao Francisco Xavier	Brazil	Record daily precipitation	34.2 mm (1.3 in)	34 of 100 (Routine)
Experiment	United States	Record low maximum temperature	24.4 C (75.9 F)	34 of 100 (Routine)
Collegeville St John's	United States	Record high maximum temperature	35.6 C (96.1 F)	34 of 100 (Routine)
Summerville 4W	United States	Record low maximum temperature	21.7 C (71.1 F)	34 of 100 (Routine)
Wentworth 2.5 WNW	United States	Record high maximum temperature	36.7 C (98.1 F)	34 of 100 (Routine)
Majkop	Russia	Record daily precipitation	26.1 mm (1.0 in)	33 of 100 (Routine)
Milan 1NW	United States	Record high maximum temperature	39.4 C (102.9 F)	33 of 100 (Routine)
Sandy Lake Dam Libby	United States	Record high maximum temperature	32.2 C (90.0 F)	33 of 100 (Routine)
Superior	United States	Record high minimum temperature	22.2 C (72.0 F)	33 of 100 (Routine)
Nhill	Australia	Record high maximum temperature	23.8 C (74.8 F)	32 of 100 (Routine)
Aiuruoca	Brazil	Record daily precipitation	38.0 mm (1.5 in)	32 of 100 (Routine)
Pointe Au Pere	Canada	Record high minimum temperature	17.2 C (63.0 F)	32 of 100 (Routine)
Yevpatoriia	Ukraine	Record daily precipitation	30.0 mm (1.2 in)	32 of 100 (Routine)
Warrenton	United States	Record low maximum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Sandy Lake Dam Libby	United States	Record high minimum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Round Grove	United States	Record daily precipitation	41.7 mm (1.6 in)	32 of 100 (Routine)
Georgetown 2 E	United States	Record low maximum temperature	25.6 C (78.1 F)	32 of 100 (Routine)
Kingstree	United States	Record low maximum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Walterboro 1 SW	United States	Record low maximum temperature	23.9 C (75.0 F)	32 of 100 (Routine)
Piacaguera (Efsj)	Brazil	Record daily precipitation	68.0 mm (2.7 in)	31 of 100 (Routine)
Live Oak	United States	Record low minimum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Bergland Dam	United States	Record high maximum temperature	32.8 C (91.0 F)	31 of 100 (Routine)
Caxambu	Brazil	Record daily precipitation	25.3 mm (1.0 in)	30 of 100 (Routine)
Madre de Deus de Minas	Brazil	Record daily precipitation	27.0 mm (1.1 in)	30 of 100 (Routine)
Ponte Do Costa	Brazil	Record daily precipitation	33.1 mm (1.3 in)	30 of 100 (Routine)
Caconde	Brazil	Record daily precipitation	27.5 mm (1.1 in)	30 of 100 (Routine)
Enderby	Canada	Record low maximum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Isabela Substn	Puerto Rico [United States]	Record high minimum temperature	24.4 C (75.9 F)	30 of 100 (Routine)
Ontonagon	United States	Record high maximum temperature	33.9 C (93.0 F)	30 of 100 (Routine)

Counts by Type and Timescale

756 records

Records set or tied on 21 August 1976 by type: Highest daily maximum 171, Lowest daily maximum 107, Highest daily minimum 72, Lowest daily minimum 165, Heaviest daily rainfall 241.

Records on 21 August 1976 by type
Record type	Records
Highest daily maximum	171
Lowest daily maximum	107
Highest daily minimum	72
Lowest daily minimum	165
Heaviest daily rainfall	241
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1976 by timescale: all-time 3, monthly 10, daily 743.

How Much Records Were Beaten By

605 broken records

Margins by which the 605 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 75.4. Ties are not counted.

Top 20 by Significance

21 August 1976

Top 20 records on 21 August 1976 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1976	Carcross, CA	all-time rain	36.8 mm (1.4 in)	5.6 mm (0.22 in)	62 years	60 of 100 (Major)
21 August 1976	Southport 5 N, US	daily rain	146.8 mm (5.8 in)	75.4 mm (3.0 in)	35 years	57 of 100 (Notable)
21 August 1976	Luminarias, BR	daily rain	35.3 mm (1.4 in)	35.3 mm (1.4 in)	35 years	53 of 100 (Notable)
21 August 1976	Haileybury, CA	all-time high min	25.6 C (78.1 F)	0.6 C (1.1 F)	65 years	48 of 100 (Notable)
21 August 1976	Nizhni Sirohozy, UA	daily rain	59.9 mm (2.4 in)	55.0 mm (2.2 in)	8 years	46 of 100 (Notable)
21 August 1976	Salitre, BR	daily rain	40.0 mm (1.6 in)	39.5 mm (1.6 in)	12 years	45 of 100 (Notable)
21 August 1976	Armagh, GB	daily high max	25.1 C (77.2 F)	0.9 C (1.6 F)	118 years	43 of 100 (Notable)
21 August 1976	Waynesboro 2 S, US	daily low max	23.9 C (75.0 F)	3.9 C (7.0 F)	73 years	43 of 100 (Notable)
21 August 1976	Visconde de Maua (Esc.Agrot), BR	daily rain	27.0 mm (1.1 in)	21.7 mm (0.9 in)	38 years	42 of 100 (Notable)
21 August 1976	Monticello 5 SE, US	daily low min	16.1 C (61.0 F)	2.2 C (4.0 F)	69 years	42 of 100 (Notable)
21 August 1976	Woodburn, AU	daily rain	25.0 mm (1.0 in)	12.0 mm (0.5 in)	48 years	41 of 100 (Notable)
21 August 1976	Kropotkin, RU	daily rain	46.3 mm (1.8 in)	33.0 mm (1.3 in)	28 years	41 of 100 (Notable)
21 August 1976	Valenca, BR	daily rain	25.6 mm (1.0 in)	20.7 mm (0.8 in)	31 years	40 of 100 (Notable)
21 August 1976	Santa Rita Do Jacutinga, BR	daily rain	32.8 mm (1.3 in)	16.8 mm (0.7 in)	11 years	40 of 100 (Notable)
21 August 1976	Santa Isabel Do Rio Preto, BR	daily rain	38.0 mm (1.5 in)	29.0 mm (1.1 in)	11 years	39 of 100 (Notable)
21 August 1976	Ribeirao de Sao Joaquim, BR	daily rain	32.6 mm (1.3 in)	26.2 mm (1.0 in)	16 years	39 of 100 (Notable)
21 August 1976	Volta Redonda, BR	daily rain	41.0 mm (1.6 in)	29.5 mm (1.2 in)	11 years	39 of 100 (Notable)
21 August 1976	Barra Mansa, BR	daily rain	33.6 mm (1.3 in)	23.8 mm (0.9 in)	31 years	39 of 100 (Notable)
21 August 1976	Stornoway Airport, GB	daily high max	23.0 C (73.4 F)	1.3 C (2.3 F)	76 years	39 of 100 (Notable)
21 August 1976	Melitopol, UA	daily rain	48.0 mm (1.9 in)	34.9 mm (1.4 in)	9 years	39 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 1976

Records set or tied on this calendar date in each year from 1800 to 1976. 1976 had 756 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 1976-08-21: 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 2026-10-13 (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 10	523
10 to 20	46
20 to 30	25
30 to 40	8
40 to 50	1
50 to 60	1
60 to 70	0
70 to 80	1