Weather Records on 21 August 1979

778 weather records were set or tied worldwide on 21 August 1979. Highest significance: Britt 3E, US.

Key Facts for 21 August 1979

On 21 August 1979, 778 weather records were set or tied at long-record stations worldwide.
136 were record highs and 185 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 39 monthly and 739 daily.
Britt 3E set a daily record precipitation of 109.0 mm (4.3 in) on 21 August 1979.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 448 records.

Record Map

778 stations

778 station records on 21 August 1979 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1979: highest significance records shown on the map
Station	Country	Type	Value	Significance
Britt 3E	United States	Record daily precipitation	109.0 mm (4.3 in)	66 of 100 (Major)
Forest City 2 NNE	United States	Record daily precipitation	177.0 mm (7.0 in)	66 of 100 (Major)
Potchefstroom;Braksp	South Africa	Record daily precipitation	35.5 mm (1.4 in)	60 of 100 (Major)
Barton	Australia	Record daily precipitation	56.0 mm (2.2 in)	57 of 100 (Notable)
Evangelista de Souza	Brazil	Record daily precipitation	120.3 mm (4.7 in)	57 of 100 (Notable)
Minsk	Belarus	Record daily precipitation	59.3 mm (2.3 in)	56 of 100 (Notable)
Loerie (Sar)	South Africa	Record daily precipitation	143.0 mm (5.6 in)	56 of 100 (Notable)
Morris	Canada	Record daily precipitation	74.0 mm (2.9 in)	55 of 100 (Notable)
Edwardsport Pwr Plt	United States	Record daily precipitation	70.1 mm (2.8 in)	54 of 100 (Notable)
Carandai	Brazil	Record daily precipitation	30.5 mm (1.2 in)	52 of 100 (Notable)
Rive	Brazil	Record daily precipitation	29.8 mm (1.2 in)	51 of 100 (Notable)
Witelsbos (Bos)	South Africa	Record daily precipitation	166.0 mm (6.5 in)	50 of 100 (Notable)
Sibley	United States	Record daily precipitation	132.6 mm (5.2 in)	49 of 100 (Notable)
Petersburg 61 Brg	United States	Record daily precipitation	50.8 mm (2.0 in)	48 of 100 (Notable)
Winchester Airport 3 E	United States	Record daily precipitation	79.5 mm (3.1 in)	48 of 100 (Notable)
La Rue	United States	Record daily precipitation	50.8 mm (2.0 in)	48 of 100 (Notable)
Albert Lea 3SE	United States	Record daily precipitation	87.9 mm (3.5 in)	47 of 100 (Notable)
Omsk	Russia	Record daily precipitation	37.9 mm (1.5 in)	46 of 100 (Notable)
Vila Matias-Montante (Pcd)	Brazil	Record daily precipitation	28.3 mm (1.1 in)	44 of 100 (Notable)
Daugavpils	Latvia	Record daily precipitation	51.8 mm (2.0 in)	44 of 100 (Notable)
Inukjuak Ua	Canada	Record daily precipitation	26.8 mm (1.1 in)	43 of 100 (Notable)
Doorndraai	South Africa	Record daily precipitation	52.5 mm (2.1 in)	43 of 100 (Notable)
Bricelyn	United States	Record daily precipitation	100.1 mm (3.9 in)	43 of 100 (Notable)
Chester	United States	Record daily precipitation	28.4 mm (1.1 in)	42 of 100 (Notable)
Leroy 5 WSW	United States	Record daily precipitation	37.3 mm (1.5 in)	40 of 100 (Notable)
Bedford 4 SW	United States	Record daily precipitation	68.6 mm (2.7 in)	40 of 100 (Notable)
Greenfield	United States	Record daily precipitation	61.7 mm (2.4 in)	40 of 100 (Notable)
Fairmont	United States	Record daily precipitation	114.8 mm (4.5 in)	40 of 100 (Notable)
Biritiba Mirim	Brazil	Record daily precipitation	44.0 mm (1.7 in)	39 of 100 (Notable)
Warsaw 2 NW	United States	Record daily precipitation	71.6 mm (2.8 in)	39 of 100 (Notable)
Casa Grande	Brazil	Record daily precipitation	60.6 mm (2.4 in)	38 of 100 (Notable)
Pskov	Russia	Record daily precipitation	26.7 mm (1.1 in)	38 of 100 (Notable)
Winkelman 6 S	United States	Record low minimum temperature	12.2 C (54.0 F)	38 of 100 (Notable)
Carson	United States	Record daily precipitation	51.8 mm (2.0 in)	38 of 100 (Notable)
Marysville	United States	Record daily precipitation	49.0 mm (1.9 in)	38 of 100 (Notable)
Ozark	United States	Record daily precipitation	28.2 mm (1.1 in)	37 of 100 (Notable)
Leroy 5 WSW	United States	Record low minimum temperature	7.8 C (46.0 F)	37 of 100 (Notable)
London State Fish Hatchery	United States	Record daily precipitation	45.7 mm (1.8 in)	37 of 100 (Notable)
Casa Grande Nm	United States	Record low minimum temperature	13.3 C (55.9 F)	36 of 100 (Notable)
Claremont Pomona Clg	United States	Record low maximum temperature	23.9 C (75.0 F)	36 of 100 (Notable)
Sedalia	United States	Record daily precipitation	52.6 mm (2.1 in)	36 of 100 (Notable)
Seymour (Mag)	South Africa	Record daily precipitation	30.5 mm (1.2 in)	35 of 100 (Notable)
Florence	United States	Record low minimum temperature	15.6 C (60.1 F)	35 of 100 (Notable)
Emmetsburg	United States	Record daily precipitation	122.7 mm (4.8 in)	35 of 100 (Notable)
Montgomery	United States	Record daily precipitation	113.0 mm (4.4 in)	35 of 100 (Notable)
Miamisburg	United States	Record daily precipitation	31.5 mm (1.2 in)	35 of 100 (Notable)
Sandspit A	Canada	Record high maximum temperature	26.2 C (79.2 F)	34 of 100 (Routine)
Prospect	South Africa	Record daily precipitation	59.0 mm (2.3 in)	34 of 100 (Routine)
Prescott	United States	Record low minimum temperature	5.6 C (42.1 F)	34 of 100 (Routine)
Pilger	United States	Record daily precipitation	56.6 mm (2.2 in)	34 of 100 (Routine)
Marietta Lock 1	United States	Record daily precipitation	50.8 mm (2.0 in)	34 of 100 (Routine)
Middletown	United States	Record daily precipitation	25.9 mm (1.0 in)	34 of 100 (Routine)
Tipp City	United States	Record daily precipitation	37.1 mm (1.5 in)	34 of 100 (Routine)
Eugene-Mahlon Sweet Fld	United States	Record daily precipitation	47.8 mm (1.9 in)	34 of 100 (Routine)
Fazenda Alegria	Brazil	Record daily precipitation	31.0 mm (1.2 in)	33 of 100 (Routine)
Jacigua (Dnos)	Brazil	Record daily precipitation	27.0 mm (1.1 in)	33 of 100 (Routine)
Piranga	Brazil	Record daily precipitation	45.0 mm (1.8 in)	33 of 100 (Routine)
Mt Carmel	United States	Record daily precipitation	46.0 mm (1.8 in)	33 of 100 (Routine)
Mc Connellsville Lk 7	United States	Record daily precipitation	39.4 mm (1.6 in)	33 of 100 (Routine)
Lemmon	United States	Record daily precipitation	30.7 mm (1.2 in)	33 of 100 (Routine)

Counts by Type and Timescale

778 records

Records set or tied on 21 August 1979 by type: Highest daily maximum 64, Lowest daily maximum 71, Highest daily minimum 72, Lowest daily minimum 114, Heaviest daily rainfall 456, Heaviest daily snowfall 1.

Records on 21 August 1979 by type
Record type	Records
Highest daily maximum	64
Lowest daily maximum	71
Highest daily minimum	72
Lowest daily minimum	114
Heaviest daily rainfall	456
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 21 August 1979 by timescale: all-time 0, monthly 39, daily 739.

How Much Records Were Beaten By

662 broken records

Margins by which the 662 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.7. Ties are not counted.

Top 20 by Significance

21 August 1979

Top 20 records on 21 August 1979 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1979	Britt 3E, US	daily rain	109.0 mm (4.3 in)	77.0 mm (3.0 in)	60 years	66 of 100 (Major)
21 August 1979	Forest City 2 NNE, US	daily rain	177.0 mm (7.0 in)	127.7 mm (5.0 in)	60 years	66 of 100 (Major)
21 August 1979	Potchefstroom;Braksp, ZA	daily rain	35.5 mm (1.4 in)	27.9 mm (1.1 in)	61 years	60 of 100 (Major)
21 August 1979	Barton, AU	monthly rain	56.0 mm (2.2 in)	24.5 mm (1.0 in)	6 years	57 of 100 (Notable)
21 August 1979	Evangelista de Souza, BR	monthly rain	120.3 mm (4.7 in)	39.2 mm (1.5 in)	10 years	57 of 100 (Notable)
21 August 1979	Minsk, BY	daily rain	59.3 mm (2.3 in)	34.5 mm (1.4 in)	29 years	56 of 100 (Notable)
21 August 1979	Loerie (Sar), ZA	monthly rain	143.0 mm (5.6 in)	75.5 mm (3.0 in)	0 years	56 of 100 (Notable)
21 August 1979	Morris, CA	daily rain	74.0 mm (2.9 in)	52.4 mm (2.1 in)	20 years	55 of 100 (Notable)
21 August 1979	Edwardsport Pwr Plt, US	daily rain	70.1 mm (2.8 in)	48.5 mm (1.9 in)	54 years	54 of 100 (Notable)
21 August 1979	Carandai, BR	daily rain	30.5 mm (1.2 in)	30.5 mm (1.2 in)	37 years	52 of 100 (Notable)
21 August 1979	Rive, BR	daily rain	29.8 mm (1.2 in)	24.6 mm (1.0 in)	26 years	51 of 100 (Notable)
21 August 1979	Witelsbos (Bos), ZA	daily rain	166.0 mm (6.5 in)	69.0 mm (2.7 in)	16 years	50 of 100 (Notable)
21 August 1979	Sibley, US	daily rain	132.6 mm (5.2 in)	71.4 mm (2.8 in)	4 years	49 of 100 (Notable)
21 August 1979	Petersburg 61 Brg, US	daily rain	50.8 mm (2.0 in)	47.8 mm (1.9 in)	28 years	48 of 100 (Notable)
21 August 1979	Winchester Airport 3 E, US	daily rain	79.5 mm (3.1 in)	73.1 mm (2.9 in)	18 years	48 of 100 (Notable)
21 August 1979	La Rue, US	daily rain	50.8 mm (2.0 in)	34.8 mm (1.4 in)	48 years	48 of 100 (Notable)
21 August 1979	Albert Lea 3SE, US	daily rain	87.9 mm (3.5 in)	56.4 mm (2.2 in)	4 years	47 of 100 (Notable)
21 August 1979	Omsk, RU	daily rain	37.9 mm (1.5 in)	19.0 mm (0.7 in)	16 years	46 of 100 (Notable)
21 August 1979	Vila Matias-Montante (Pcd), BR	monthly rain	28.3 mm (1.1 in)	11.5 mm (0.5 in)	5 years	44 of 100 (Notable)
21 August 1979	Daugavpils, LV	monthly rain	51.8 mm (2.0 in)	14.5 mm (0.6 in)	28 years	44 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 1979

Records set or tied on this calendar date in each year from 1800 to 1979. 1979 had 778 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 1979-08-21: 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 20	614
20 to 40	34
40 to 60	7
60 to 80	6
80 to 100	0
100 to 120	0
120 to 140	1