Weather Records on 21 April 1970

728 weather records were set or tied worldwide on 21 April 1970. Highest significance: Schierke, DE.

Key Facts for 21 April 1970

On 21 April 1970, 728 weather records were set or tied at long-record stations worldwide.
82 were record highs and 265 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 11 monthly and 716 daily.
Schierke set a daily record snow depth of 70.0 cm (27.6 in) on 21 April 1970.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 461 records.

Record Map

728 stations

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

Weather records on 21 April 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Schierke	Germany	Record snow depth	70.0 cm (27.6 in)	65 of 100 (Major)
Hettinger	United States	Record snow depth	15.2 cm (6.0 in)	62 of 100 (Major)
Edgeley 3WNW	United States	Record snow depth	12.7 cm (5.0 in)	61 of 100 (Major)
Honomu Mauka 138	United States	Record daily precipitation	233.2 mm (9.2 in)	58 of 100 (Notable)
Hakalau 142	United States	Record daily precipitation	174.2 mm (6.9 in)	56 of 100 (Notable)
Marree (Farina)	Australia	Record daily precipitation	42.4 mm (1.7 in)	54 of 100 (Notable)
Mandan Exp STN	United States	Record snow depth	17.8 cm (7.0 in)	53 of 100 (Notable)
Peppermint Grove	Australia	Record daily precipitation	40.4 mm (1.6 in)	52 of 100 (Notable)
Glenbrook	United States	Record daily snowfall	45.7 cm (18.0 in)	52 of 100 (Notable)
Shamakhy	Azerbaijan	Record daily precipitation	39.1 mm (1.5 in)	51 of 100 (Notable)
Warriup	Australia	Record daily precipitation	35.6 mm (1.4 in)	51 of 100 (Notable)
Regina Int'l A	Canada	Record daily snowfall	8.6 cm (3.4 in)	50 of 100 (Notable)
Kailua 446	United States	Record daily precipitation	142.2 mm (5.6 in)	50 of 100 (Notable)
Paratinga (Rio Branco)	Brazil	Record daily precipitation	78.0 mm (3.1 in)	49 of 100 (Notable)
Custer	United States	Record snow depth	55.9 cm (22.0 in)	49 of 100 (Notable)
Bremer Bay	Australia	Record daily precipitation	38.6 mm (1.5 in)	48 of 100 (Notable)
Paakea 350	United States	Record daily precipitation	241.3 mm (9.5 in)	47 of 100 (Notable)
Whitlands (Burder's Lane)	Australia	Record daily precipitation	86.9 mm (3.4 in)	46 of 100 (Notable)
Papaikou 144.1	United States	Record daily precipitation	160.5 mm (6.3 in)	46 of 100 (Notable)
Leichardt	Australia	Record daily precipitation	34.3 mm (1.4 in)	45 of 100 (Notable)
Faith	United States	Record snow depth	20.3 cm (8.0 in)	45 of 100 (Notable)
Bredy	Russia	Record daily precipitation	25.2 mm (1.0 in)	44 of 100 (Notable)
Glenbrook	United States	Record daily precipitation	30.5 mm (1.2 in)	44 of 100 (Notable)
May 2SSE	United States	Record daily snowfall	15.2 cm (6.0 in)	43 of 100 (Notable)
Indian Head Cda	Canada	Record daily snowfall	7.6 cm (3.0 in)	42 of 100 (Notable)
Brocken	Germany	Record snow depth	320.0 cm (126.0 in)	42 of 100 (Notable)
Deniliquin (Wilkinson St)	Australia	Record high minimum temperature	20.1 C (68.2 F)	41 of 100 (Notable)
Francis	Canada	Record daily snowfall	8.9 cm (3.5 in)	41 of 100 (Notable)
Fichtelberg	Germany	Record snow depth	240.0 cm (94.5 in)	40 of 100 (Notable)
Makapuu Point 724	United States	Record daily precipitation	69.3 mm (2.7 in)	39 of 100 (Notable)
Nullawil	Australia	Record daily precipitation	41.7 mm (1.6 in)	38 of 100 (Notable)
Grenfell	Canada	Record daily snowfall	10.2 cm (4.0 in)	38 of 100 (Notable)
Ekaterinburg	Russia	Record low minimum temperature	-14.8 C (5.4 F)	38 of 100 (Notable)
Austin #2	United States	Record daily snowfall	20.3 cm (8.0 in)	38 of 100 (Notable)
Russell	Canada	Record daily snowfall	7.6 cm (3.0 in)	37 of 100 (Notable)
Dupree	United States	Record snow depth	20.3 cm (8.0 in)	37 of 100 (Notable)
Parry Sound	Canada	Record daily precipitation	27.2 mm (1.1 in)	36 of 100 (Notable)
Perm	Russia	Record low minimum temperature	-12.1 C (10.2 F)	36 of 100 (Notable)
Baudette	United States	Record snow depth	17.8 cm (7.0 in)	36 of 100 (Notable)
McGill	United States	Record daily snowfall	5.1 cm (2.0 in)	36 of 100 (Notable)
Walgett Council Depot	Australia	Record high minimum temperature	19.8 C (67.6 F)	35 of 100 (Notable)
Kustanai	Kazakhstan	Record low minimum temperature	-15.6 C (3.9 F)	35 of 100 (Notable)
Salekhard	Russia	Record low minimum temperature	-33.5 C (-28.3 F)	35 of 100 (Notable)
Cherdyn'	Russia	Record low minimum temperature	-16.5 C (2.3 F)	35 of 100 (Notable)
Honohina 137	United States	Record daily precipitation	188.5 mm (7.4 in)	35 of 100 (Notable)
Cape Riche	Australia	Record daily precipitation	34.3 mm (1.4 in)	34 of 100 (Routine)
Mount Pleasant	Australia	Record daily precipitation	32.8 mm (1.3 in)	34 of 100 (Routine)
Skjak	Norway	Record snow depth	17.0 cm (6.7 in)	34 of 100 (Routine)
Pahala 21	United States	Record daily precipitation	40.6 mm (1.6 in)	34 of 100 (Routine)
Nova Olinda (Andreza)	Brazil	Record daily precipitation	110.5 mm (4.4 in)	33 of 100 (Routine)
Kazan	Russia	Record low minimum temperature	-5.7 C (21.7 F)	33 of 100 (Routine)
Ekaterinburg	Russia	Record low maximum temperature	-4.1 C (24.6 F)	33 of 100 (Routine)
Kurgan	Russia	Record low minimum temperature	-14.2 C (6.4 F)	33 of 100 (Routine)
Raywood	Australia	Record daily precipitation	32.0 mm (1.3 in)	32 of 100 (Routine)
Kergunyah South	Australia	Record daily precipitation	36.8 mm (1.4 in)	32 of 100 (Routine)
Crystal Falls	Canada	Record daily precipitation	27.9 mm (1.1 in)	32 of 100 (Routine)
Kirov	Russia	Record low minimum temperature	-9.9 C (14.2 F)	32 of 100 (Routine)
Orenburg	Russia	Record low minimum temperature	-6.8 C (19.8 F)	32 of 100 (Routine)
Dayville	United States	Record low minimum temperature	-7.2 C (19.0 F)	32 of 100 (Routine)
Wandering Comparison	Australia	Record low maximum temperature	13.0 C (55.4 F)	31 of 100 (Routine)

Counts by Type and Timescale

728 records

Records set or tied on 21 April 1970 by type: Highest daily maximum 37, Lowest daily maximum 125, Highest daily minimum 45, Lowest daily minimum 140, Heaviest daily rainfall 263, Heaviest daily snowfall 77, Deepest snow cover 41.

Records on 21 April 1970 by type
Record type	Records
Highest daily maximum	37
Lowest daily maximum	125
Highest daily minimum	45
Lowest daily minimum	140
Heaviest daily rainfall	263
Heaviest daily snowfall	77
Deepest snow cover	41

Records on 21 April 1970 by timescale: all-time 1, monthly 11, daily 716.

How Much Records Were Beaten By

602 broken records

Margins by which the 602 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1750.0. Ties are not counted.

Top 20 by Significance

21 April 1970

Top 20 records on 21 April 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1970	Schierke, DE	daily snow depth	70.0 cm (27.6 in)	55.0 cm (21.7 in)	67 years	65 of 100 (Major)
21 April 1970	Hettinger, US	daily snow depth	15.2 cm (6.0 in)	15.2 cm (6.0 in)	53 years	62 of 100 (Major)
21 April 1970	Edgeley 3WNW, US	daily snow depth	12.7 cm (5.0 in)	12.7 cm (5.0 in)	68 years	61 of 100 (Major)
21 April 1970	Honomu Mauka 138, US	daily rain	233.2 mm (9.2 in)	124.7 mm (4.9 in)	43 years	58 of 100 (Notable)
21 April 1970	Hakalau 142, US	daily rain	174.2 mm (6.9 in)	77.7 mm (3.1 in)	57 years	56 of 100 (Notable)
21 April 1970	Marree (Farina), AU	daily rain	42.4 mm (1.7 in)	22.8 mm (0.9 in)	56 years	54 of 100 (Notable)
21 April 1970	Mandan Exp STN, US	daily snow depth	17.8 cm (7.0 in)	17.8 cm (7.0 in)	56 years	53 of 100 (Notable)
21 April 1970	Peppermint Grove, AU	daily rain	40.4 mm (1.6 in)	31.8 mm (1.3 in)	41 years	52 of 100 (Notable)
21 April 1970	Glenbrook, US	daily snowfall	45.7 cm (18.0 in)	39.3 cm (15.5 in)	56 years	52 of 100 (Notable)
21 April 1970	Shamakhy, AZ	daily rain	39.1 mm (1.5 in)	25.4 mm (1.0 in)	27 years	51 of 100 (Notable)
21 April 1970	Warriup, AU	daily rain	35.6 mm (1.4 in)	26.2 mm (1.0 in)	41 years	51 of 100 (Notable)
21 April 1970	Regina Int'l A, CA	daily snowfall	8.6 cm (3.4 in)	7.3 cm (2.9 in)	48 years	50 of 100 (Notable)
21 April 1970	Kailua 446, US	daily rain	142.2 mm (5.6 in)	56.6 mm (2.2 in)	59 years	50 of 100 (Notable)
21 April 1970	Paratinga (Rio Branco), BR	daily rain	78.0 mm (3.1 in)	56.5 mm (2.2 in)	33 years	49 of 100 (Notable)
21 April 1970	Custer, US	daily snow depth	55.9 cm (22.0 in)	35.6 cm (14.0 in)	43 years	49 of 100 (Notable)
21 April 1970	Bremer Bay, AU	daily rain	38.6 mm (1.5 in)	31.0 mm (1.2 in)	41 years	48 of 100 (Notable)
21 April 1970	Paakea 350, US	daily rain	241.3 mm (9.5 in)	179.1 mm (7.1 in)	13 years	47 of 100 (Notable)
21 April 1970	Whitlands (Burder's Lane), AU	daily rain	86.9 mm (3.4 in)	55.7 mm (2.2 in)	13 years	46 of 100 (Notable)
21 April 1970	Papaikou 144.1, US	daily rain	160.5 mm (6.3 in)	76.7 mm (3.0 in)	31 years	46 of 100 (Notable)
21 April 1970	Leichardt, AU	daily rain	34.3 mm (1.4 in)	18.6 mm (0.7 in)	56 years	45 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

1793 to 1970

Records set or tied on this calendar date in each year from 1793 to 1970. 1970 had 728 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	887
2024	754
2025	506
2026	853

Download the Data

Data for records on 1970-04-21: 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 250	595
250 to 500	3
500 to 750	2
750 to 1000	1
1000 to 1250	0
1250 to 1500	0
1500 to 1750	1