Weather Records on 21 August 1970

373 weather records were set or tied worldwide on 21 August 1970. Highest significance: Micurinsk, RU.

Key Facts for 21 August 1970

On 21 August 1970, 373 weather records were set or tied at long-record stations worldwide.
79 were record highs and 103 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 6 monthly and 366 daily.
Micurinsk set a daily record precipitation of 44.5 mm (1.8 in) on 21 August 1970.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 450 records.

Record Map

373 stations

373 station records on 21 August 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Micurinsk	Russia	Record daily precipitation	44.5 mm (1.8 in)	75 of 100 (Major)
Gluckstadt	Germany	Record daily precipitation	43.4 mm (1.7 in)	55 of 100 (Notable)
Tuskahoma	United States	Record daily precipitation	121.9 mm (4.8 in)	55 of 100 (Notable)
Glenwood Spgs #2	United States	Record daily precipitation	36.8 mm (1.4 in)	49 of 100 (Notable)
Stamps	United States	Record daily precipitation	57.4 mm (2.3 in)	44 of 100 (Notable)
Hohenpeissenberg	Germany	Record daily precipitation	43.1 mm (1.7 in)	43 of 100 (Notable)
Weddingstedt	Germany	Record daily precipitation	52.4 mm (2.1 in)	43 of 100 (Notable)
Hamburg Fuhlsbuettel	Germany	Record daily precipitation	33.8 mm (1.3 in)	41 of 100 (Notable)
Stellenbosch (Tnk)	South Africa	Record daily precipitation	32.0 mm (1.3 in)	41 of 100 (Notable)
Hammon 3 SSW	United States	Record daily precipitation	64.8 mm (2.6 in)	41 of 100 (Notable)
Thief River Falls	United States	Record daily precipitation	43.9 mm (1.7 in)	39 of 100 (Notable)
Idabel	United States	Record daily precipitation	40.4 mm (1.6 in)	38 of 100 (Notable)
Hardwick	United States	Record daily precipitation	66.0 mm (2.6 in)	37 of 100 (Notable)
Robben Island (Vrt)	South Africa	Record daily precipitation	26.0 mm (1.0 in)	36 of 100 (Notable)
Artern	Germany	Record daily precipitation	26.8 mm (1.1 in)	35 of 100 (Notable)
Hope 3 NE	United States	Record daily precipitation	65.5 mm (2.6 in)	34 of 100 (Routine)
El Dorado Goodwin Fld	United States	Record daily precipitation	46.5 mm (1.8 in)	33 of 100 (Routine)
Soltau	Germany	Record daily precipitation	34.4 mm (1.4 in)	32 of 100 (Routine)
Rodino	Russia	Record daily precipitation	42.3 mm (1.7 in)	32 of 100 (Routine)
Hayden	United States	Record high minimum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Leroy 5 WSW	United States	Record low maximum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Camargo	United States	Record daily precipitation	68.3 mm (2.7 in)	32 of 100 (Routine)
Port Aux Basques	Canada	Record high minimum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Mc Cool Junction	United States	Record daily precipitation	30.5 mm (1.2 in)	31 of 100 (Routine)
South Pass City	United States	Record high minimum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Estevan Point	Canada	Record low maximum temperature	12.8 C (55.0 F)	30 of 100 (Routine)
Banff	Canada	Record high maximum temperature	28.3 C (82.9 F)	30 of 100 (Routine)
Magdeburg	Germany	Record daily precipitation	34.6 mm (1.4 in)	30 of 100 (Routine)
Coloso	Puerto Rico [United States]	Record high minimum temperature	22.8 C (73.0 F)	30 of 100 (Routine)
Clarksville Wwtp	United States	Record daily precipitation	56.4 mm (2.2 in)	30 of 100 (Routine)
Mauston 1 SE	United States	Record low minimum temperature	4.4 C (39.9 F)	30 of 100 (Routine)
Bhagamandala	India	Record daily precipitation	129.5 mm (5.1 in)	29 of 100 (Routine)
Irapuato	Mexico	Record low maximum temperature	20.0 C (68.0 F)	29 of 100 (Routine)
Humacao 2 SSE	Puerto Rico [United States]	Record high minimum temperature	25.6 C (78.1 F)	29 of 100 (Routine)
Ware	United States	Record daily precipitation	39.1 mm (1.5 in)	29 of 100 (Routine)
Kon-Kolodez	Russia	Record low maximum temperature	14.1 C (57.4 F)	28 of 100 (Routine)
Crescent City 3 NNW	United States	Record low maximum temperature	12.8 C (55.0 F)	28 of 100 (Routine)
Erick	United States	Record daily precipitation	43.2 mm (1.7 in)	28 of 100 (Routine)
Salina	United States	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Halle	Germany	Record daily precipitation	35.0 mm (1.4 in)	27 of 100 (Routine)
Greiz-Dolau	Germany	Record daily precipitation	43.6 mm (1.7 in)	27 of 100 (Routine)
Tommot	Russia	Record daily precipitation	32.8 mm (1.3 in)	27 of 100 (Routine)
Minden	United States	Record daily precipitation	43.2 mm (1.7 in)	27 of 100 (Routine)
Santa Rosa	United States	Record daily precipitation	35.1 mm (1.4 in)	27 of 100 (Routine)
Statesville 2 NNE	United States	Record high minimum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Supa	India	Record daily precipitation	78.4 mm (3.1 in)	26 of 100 (Routine)
Lebanon (Bos)	South Africa	Record daily precipitation	36.5 mm (1.4 in)	26 of 100 (Routine)
Minneapolis	United States	Record low maximum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Adaven	United States	Record high minimum temperature	17.2 C (63.0 F)	26 of 100 (Routine)
Eden	United States	Record daily precipitation	31.2 mm (1.2 in)	26 of 100 (Routine)
Northfield	United States	Record daily precipitation	30.5 mm (1.2 in)	26 of 100 (Routine)
Fichtelberg	Germany	Record daily precipitation	39.5 mm (1.6 in)	25 of 100 (Routine)
Eichstatt-Landershofen	Germany	Record daily precipitation	32.5 mm (1.3 in)	25 of 100 (Routine)
Camilla 3SE	United States	Record daily precipitation	51.3 mm (2.0 in)	25 of 100 (Routine)
Cordell	United States	Record daily precipitation	45.5 mm (1.8 in)	25 of 100 (Routine)
Martinsville Fltr Plt	United States	Record daily precipitation	66.3 mm (2.6 in)	25 of 100 (Routine)
Viroqua	United States	Record low minimum temperature	5.0 C (41.0 F)	25 of 100 (Routine)
Brocken	Germany	Record daily precipitation	31.2 mm (1.2 in)	24 of 100 (Routine)
Lipeck	Russia	Record daily precipitation	26.8 mm (1.1 in)	24 of 100 (Routine)
Carnegie 5 NE	United States	Record daily precipitation	46.7 mm (1.8 in)	24 of 100 (Routine)

Counts by Type and Timescale

373 records

Records set or tied on 21 August 1970 by type: Highest daily maximum 25, Lowest daily maximum 52, Highest daily minimum 54, Lowest daily minimum 51, Heaviest daily rainfall 191.

Records on 21 August 1970 by type
Record type	Records
Highest daily maximum	25
Lowest daily maximum	52
Highest daily minimum	54
Lowest daily minimum	51
Heaviest daily rainfall	191
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1970 by timescale: all-time 1, monthly 6, daily 366.

How Much Records Were Beaten By

300 broken records

Margins by which the 300 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 52.1. Ties are not counted.

Top 20 by Significance

21 August 1970

Top 20 records on 21 August 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1970	Micurinsk, RU	daily rain	44.5 mm (1.8 in)	28.5 mm (1.1 in)	88 years	75 of 100 (Major)
21 August 1970	Gluckstadt, DE	daily rain	43.4 mm (1.7 in)	26.2 mm (1.0 in)	39 years	55 of 100 (Notable)
21 August 1970	Tuskahoma, US	monthly rain	121.9 mm (4.8 in)	48.7 mm (1.9 in)	39 years	55 of 100 (Notable)
21 August 1970	Glenwood Spgs #2, US	monthly rain	36.8 mm (1.4 in)	8.9 mm (0.35 in)	41 years	49 of 100 (Notable)
21 August 1970	Stamps, US	daily rain	57.4 mm (2.3 in)	52.1 mm (2.1 in)	9 years	44 of 100 (Notable)
21 August 1970	Hohenpeissenberg, DE	daily rain	43.1 mm (1.7 in)	5.7 mm (0.22 in)	90 years	43 of 100 (Notable)
21 August 1970	Weddingstedt, DE	daily rain	52.4 mm (2.1 in)	28.8 mm (1.1 in)	8 years	43 of 100 (Notable)
21 August 1970	Hamburg Fuhlsbuettel, DE	daily rain	33.8 mm (1.3 in)	19.4 mm (0.8 in)	16 years	41 of 100 (Notable)
21 August 1970	Stellenbosch (Tnk), ZA	daily rain	32.0 mm (1.3 in)	9.1 mm (0.36 in)	77 years	41 of 100 (Notable)
21 August 1970	Hammon 3 SSW, US	daily rain	64.8 mm (2.6 in)	40.4 mm (1.6 in)	49 years	41 of 100 (Notable)
21 August 1970	Thief River Falls, US	daily rain	43.9 mm (1.7 in)	20.3 mm (0.8 in)	56 years	39 of 100 (Notable)
21 August 1970	Idabel, US	daily rain	40.4 mm (1.6 in)	22.1 mm (0.9 in)	63 years	38 of 100 (Notable)
21 August 1970	Hardwick, US	daily rain	66.0 mm (2.6 in)	39.1 mm (1.5 in)	32 years	37 of 100 (Notable)
21 August 1970	Robben Island (Vrt), ZA	daily rain	26.0 mm (1.0 in)	7.7 mm (0.30 in)	57 years	36 of 100 (Notable)
21 August 1970	Artern, DE	daily rain	26.8 mm (1.1 in)	6.3 mm (0.25 in)	59 years	35 of 100 (Notable)
21 August 1970	Hope 3 NE, US	daily rain	65.5 mm (2.6 in)	40.4 mm (1.6 in)	9 years	34 of 100 (Routine)
21 August 1970	El Dorado Goodwin Fld, US	daily rain	46.5 mm (1.8 in)	14.5 mm (0.6 in)	56 years	33 of 100 (Routine)
21 August 1970	Soltau, DE	daily rain	34.4 mm (1.4 in)	10.4 mm (0.4 in)	32 years	32 of 100 (Routine)
21 August 1970	Rodino, RU	monthly rain	42.3 mm (1.7 in)	7.4 mm (0.29 in)	17 years	32 of 100 (Routine)
21 August 1970	Hayden, US	daily high min	19.4 C (66.9 F)	7.2 C (13.0 F)	12 years	32 of 100 (Routine)

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 1970

Records set or tied on this calendar date in each year from 1800 to 1970. 1970 had 373 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 1970-08-21: 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).