Weather Records on 21 June 1970

614 weather records were set or tied worldwide on 21 June 1970. Highest significance: Villa Ahumada, MX.

Key Facts for 21 June 1970

On 21 June 1970, 614 weather records were set or tied at long-record stations worldwide.
295 were record highs and 143 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 12 monthly and 600 daily.
Villa Ahumada set a daily record precipitation of 47.0 mm (1.9 in) on 21 June 1970.
Across 165 earlier years (1802 to 2026) the same calendar date averaged 430 records.

Record Map

614 stations

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

Weather records on 21 June 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Villa Ahumada	Mexico	Record daily precipitation	47.0 mm (1.9 in)	65 of 100 (Major)
Denton 2 E	United States	Record daily precipitation	80.5 mm (3.2 in)	65 of 100 (Major)
Mc Minnville	United States	Record daily precipitation	86.4 mm (3.4 in)	56 of 100 (Notable)
Joao Amaro	Brazil	Record daily precipitation	35.0 mm (1.4 in)	54 of 100 (Notable)
Branson	United States	Record daily precipitation	28.7 mm (1.1 in)	49 of 100 (Notable)
Murfreesboro 5 N	United States	Record daily precipitation	137.9 mm (5.4 in)	49 of 100 (Notable)
Ephrata	United States	Record daily precipitation	58.4 mm (2.3 in)	47 of 100 (Notable)
Kuppam	India	Record daily precipitation	45.8 mm (1.8 in)	46 of 100 (Notable)
Palair	India	Record daily precipitation	92.6 mm (3.6 in)	46 of 100 (Notable)
Kaslo	Canada	Record high minimum temperature	20.6 C (69.1 F)	45 of 100 (Notable)
Cordele	United States	Record daily precipitation	46.7 mm (1.8 in)	45 of 100 (Notable)
Berhampore	India	Record daily precipitation	120.4 mm (4.7 in)	43 of 100 (Notable)
Avalon Pleasure Pier	United States	Record low minimum temperature	5.6 C (42.1 F)	42 of 100 (Notable)
Joliet	United States	Record daily precipitation	85.6 mm (3.4 in)	42 of 100 (Notable)
Gurjala(Gurujala)	India	Record daily precipitation	64.8 mm (2.6 in)	41 of 100 (Notable)
Iguala (Smn)	Mexico	Record high minimum temperature	26.7 C (80.1 F)	40 of 100 (Notable)
Velmo	Russia	Record daily precipitation	26.7 mm (1.1 in)	39 of 100 (Notable)
Ancho	United States	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)
Menard	United States	Record daily precipitation	43.7 mm (1.7 in)	39 of 100 (Notable)
Huetamo	Mexico	Record daily precipitation	68.3 mm (2.7 in)	37 of 100 (Notable)
Brownsville	United States	Record daily precipitation	43.4 mm (1.7 in)	37 of 100 (Notable)
Armstrong	Canada	Record high minimum temperature	21.1 C (70.0 F)	36 of 100 (Notable)
Moro	United States	Record high minimum temperature	22.8 C (73.0 F)	36 of 100 (Notable)
Sion	Canada	Record high minimum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Covington 3 SW	United States	Record daily precipitation	31.8 mm (1.3 in)	34 of 100 (Routine)
Cimbaj	Uzbekistan	Record high minimum temperature	27.7 C (81.9 F)	34 of 100 (Routine)
Onega	Russia	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Karlshamn	Sweden	Record high maximum temperature	28.1 C (82.6 F)	33 of 100 (Routine)
Morris River	United States	Record daily precipitation	50.8 mm (2.0 in)	33 of 100 (Routine)
Detroit	United States	Record high maximum temperature	35.0 C (95.0 F)	33 of 100 (Routine)
Grants Pass	United States	Record high minimum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Joliet	United States	Record low maximum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Vernon Coldstream Ranch	Canada	Record high minimum temperature	17.8 C (64.0 F)	32 of 100 (Routine)
Syracuse 1NE	United States	Record low minimum temperature	8.3 C (46.9 F)	32 of 100 (Routine)
Clarksville Wwtp	United States	Record daily precipitation	48.0 mm (1.9 in)	32 of 100 (Routine)
Doylestown	United States	Record daily precipitation	36.1 mm (1.4 in)	31 of 100 (Routine)
Dover 1 W	United States	Record daily precipitation	31.8 mm (1.3 in)	31 of 100 (Routine)
Ridgetown	Canada	Record low maximum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Sullurpet	India	Record daily precipitation	29.2 mm (1.1 in)	30 of 100 (Routine)
Avangard Zernosovho	Russia	Record daily precipitation	28.8 mm (1.1 in)	30 of 100 (Routine)
Skegness	United Kingdom	Record high maximum temperature	26.7 C (80.1 F)	30 of 100 (Routine)
Carlinville	United States	Record low maximum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Chestertown	United States	Record daily precipitation	27.9 mm (1.1 in)	30 of 100 (Routine)
Jefferson City Wtp	United States	Record low maximum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Indian Lake 2SW	United States	Record low maximum temperature	12.8 C (55.0 F)	30 of 100 (Routine)
Lake Yellowstone	United States	Record high minimum temperature	8.3 C (46.9 F)	30 of 100 (Routine)
Cuddapah	India	Record daily precipitation	34.2 mm (1.3 in)	29 of 100 (Routine)
Newark Ag Farm	United States	Record daily precipitation	37.3 mm (1.5 in)	29 of 100 (Routine)
Cuthbert	United States	Record high minimum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Ithaca Cornell UNIV	United States	Record low minimum temperature	3.9 C (39.0 F)	29 of 100 (Routine)
Andrews	United States	Record daily precipitation	40.9 mm (1.6 in)	29 of 100 (Routine)
Warren	United States	Record low maximum temperature	16.7 C (62.1 F)	29 of 100 (Routine)
Drummonds	Australia	Record daily precipitation	58.7 mm (2.3 in)	28 of 100 (Routine)
Achinsk	Russia	Record high minimum temperature	17.2 C (63.0 F)	28 of 100 (Routine)
Wilmington Porter Rsch	United States	Record daily precipitation	49.0 mm (1.9 in)	28 of 100 (Routine)
Kokomo 3 WSW	United States	Record low maximum temperature	19.4 C (66.9 F)	28 of 100 (Routine)
Seminole	United States	Record daily precipitation	28.7 mm (1.1 in)	28 of 100 (Routine)
Pomeroy	United States	Record high maximum temperature	36.1 C (97.0 F)	28 of 100 (Routine)
Iron River	Canada	Record high maximum temperature	32.8 C (91.0 F)	27 of 100 (Routine)
Tranebjerg	Denmark	Record high maximum temperature	28.5 C (83.3 F)	27 of 100 (Routine)

Counts by Type and Timescale

614 records

Records set or tied on 21 June 1970 by type: Highest daily maximum 154, Lowest daily maximum 88, Highest daily minimum 141, Lowest daily minimum 55, Heaviest daily rainfall 176.

Records on 21 June 1970 by type
Record type	Records
Highest daily maximum	154
Lowest daily maximum	88
Highest daily minimum	141
Lowest daily minimum	55
Heaviest daily rainfall	176
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 June 1970 by timescale: all-time 2, monthly 12, daily 600.

How Much Records Were Beaten By

489 broken records

Margins by which the 489 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 62.1. Ties are not counted.

Top 20 by Significance

21 June 1970

Top 20 records on 21 June 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 June 1970	Villa Ahumada, MX	daily rain	47.0 mm (1.9 in)	32.5 mm (1.3 in)	65 years	65 of 100 (Major)
21 June 1970	Denton 2 E, US	daily rain	80.5 mm (3.2 in)	49.5 mm (1.9 in)	74 years	65 of 100 (Major)
21 June 1970	Mc Minnville, US	daily rain	86.4 mm (3.4 in)	47.0 mm (1.9 in)	56 years	56 of 100 (Notable)
21 June 1970	Joao Amaro, BR	daily rain	35.0 mm (1.4 in)	25.4 mm (1.0 in)	28 years	54 of 100 (Notable)
21 June 1970	Branson, US	daily rain	28.7 mm (1.1 in)	25.7 mm (1.0 in)	28 years	49 of 100 (Notable)
21 June 1970	Murfreesboro 5 N, US	monthly rain	137.9 mm (5.4 in)	18.5 mm (0.7 in)	58 years	49 of 100 (Notable)
21 June 1970	Ephrata, US	daily rain	58.4 mm (2.3 in)	25.4 mm (1.0 in)	64 years	47 of 100 (Notable)
21 June 1970	Kuppam, IN	daily rain	45.8 mm (1.8 in)	40.2 mm (1.6 in)	23 years	46 of 100 (Notable)
21 June 1970	Palair, IN	daily rain	92.6 mm (3.6 in)	62.1 mm (2.4 in)	8 years	46 of 100 (Notable)
21 June 1970	Kaslo, CA	all-time high min	20.6 C (69.1 F)	0.6 C (1.1 F)	54 years	45 of 100 (Notable)
21 June 1970	Cordele, US	daily rain	46.7 mm (1.8 in)	25.4 mm (1.0 in)	64 years	45 of 100 (Notable)
21 June 1970	Berhampore, IN	daily rain	120.4 mm (4.7 in)	35.3 mm (1.4 in)	61 years	43 of 100 (Notable)
21 June 1970	Avalon Pleasure Pier, US	daily low min	5.6 C (42.1 F)	4.4 C (7.9 F)	44 years	42 of 100 (Notable)
21 June 1970	Joliet, US	daily rain	85.6 mm (3.4 in)	42.4 mm (1.7 in)	19 years	42 of 100 (Notable)
21 June 1970	Gurjala(Gurujala), IN	daily rain	64.8 mm (2.6 in)	35.8 mm (1.4 in)	40 years	41 of 100 (Notable)
21 June 1970	Iguala (Smn), MX	daily high min	26.7 C (80.1 F)	3.9 C (7.0 F)	44 years	40 of 100 (Notable)
21 June 1970	Velmo, RU	daily rain	26.7 mm (1.1 in)	15.9 mm (0.6 in)	28 years	39 of 100 (Notable)
21 June 1970	Ancho, US	daily rain	25.4 mm (1.0 in)	17.8 mm (0.7 in)	45 years	39 of 100 (Notable)
21 June 1970	Menard, US	daily rain	43.7 mm (1.7 in)	31.0 mm (1.2 in)	43 years	39 of 100 (Notable)
21 June 1970	Huetamo, MX	daily rain	68.3 mm (2.7 in)	39.9 mm (1.6 in)	23 years	37 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

1802 to 1970

Records set or tied on this calendar date in each year from 1802 to 1970. 1970 had 614 records.

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

Records on 06-21 in each year
Year	Records
1802	1
1803	2
1805	1
1814	1
1821	3
1828	1
1831	1
1839	2
1846	1
1853	1
1855	1
1861	3
1865	1
1868	1
1869	4
1870	3
1871	1
1873	1
1874	1
1875	2
1879	1
1880	1
1881	1
1882	1
1883	1
1884	2
1885	1
1886	3
1887	1
1888	3
1889	1
1891	1
1892	2
1893	7
1895	6
1896	3
1897	3
1898	6
1899	6
1900	6
1901	5
1902	20
1903	15
1904	7
1905	14
1906	19
1907	15
1908	20
1909	19
1910	36
1911	12
1912	14
1913	34
1914	24
1915	40
1916	80
1917	97
1918	77
1919	32
1920	42
1921	85
1922	43
1923	229
1924	124
1925	333
1926	162
1927	146
1928	139
1929	84
1930	177
1931	340
1932	180
1933	645
1934	223
1935	247
1936	642
1937	475
1938	396
1939	250
1940	674
1941	401
1942	340
1943	439
1944	426
1945	709
1946	386
1947	637
1948	392
1949	391
1950	329
1951	347
1952	502
1953	761
1954	501
1955	271
1956	534
1957	932
1958	627
1959	356
1960	471
1961	956
1962	176
1963	667
1964	458
1965	400
1966	467
1967	789
1968	654
1969	687
1970	614
1971	394
1972	934
1973	683
1974	598
1975	996
1976	746
1977	476
1978	368
1979	857
1980	677
1981	889
1982	658
1983	752
1984	913
1985	516
1986	601
1987	940
1988	1,834
1989	856
1990	847
1991	1,067
1992	1,679
1993	939
1994	777
1995	978
1996	1,075
1997	1,037
1998	1,746
1999	994
2000	1,212
2001	658
2002	828
2003	1,034
2004	697
2005	1,090
2006	774
2007	1,085
2008	580
2009	1,060
2010	852
2011	1,340
2012	1,151
2013	571
2014	434
2015	707
2016	877
2017	954
2018	577
2019	969
2020	519
2021	1,132
2022	774
2023	987
2024	679
2025	1,536
2026	736

Download the Data

Data for records on 1970-06-21: 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	435
10 to 20	32
20 to 30	12
30 to 40	5
40 to 50	4
50 to 60	0
60 to 70	1