Weather Records on 30 April 1970

1,189 weather records were set or tied worldwide on 30 April 1970. Highest significance: Cassville 1 NE, US.

Key Facts for 30 April 1970

On 30 April 1970, 1,189 weather records were set or tied at long-record stations worldwide.
632 were record highs and 239 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 145 monthly and 1,043 daily.
Cassville 1 NE set a daily record precipitation of 80.0 mm (3.1 in) on 30 April 1970.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 442 records.

Record Map

1,189 stations

1,189 station records on 30 April 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 April 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cassville 1 NE	United States	Record daily precipitation	80.0 mm (3.1 in)	61 of 100 (Major)
Lockwood	United States	Record daily precipitation	104.4 mm (4.1 in)	58 of 100 (Notable)
Guthrie 5S	United States	Record daily precipitation	77.5 mm (3.1 in)	57 of 100 (Notable)
White Hall 1 E	United States	Record daily precipitation	101.1 mm (4.0 in)	56 of 100 (Notable)
Nanutarra	Australia	Record daily precipitation	63.8 mm (2.5 in)	55 of 100 (Notable)
Macon	United States	Record daily precipitation	66.0 mm (2.6 in)	53 of 100 (Notable)
Owensville	United States	Record daily precipitation	66.0 mm (2.6 in)	53 of 100 (Notable)
Caplinger Mills	United States	Record daily precipitation	120.7 mm (4.8 in)	52 of 100 (Notable)
Cushing	United States	Record daily precipitation	99.1 mm (3.9 in)	52 of 100 (Notable)
Winning	Australia	Record daily precipitation	43.9 mm (1.7 in)	51 of 100 (Notable)
Minderoo	Australia	Record daily precipitation	71.9 mm (2.8 in)	49 of 100 (Notable)
Versailles	United States	Record daily precipitation	66.5 mm (2.6 in)	49 of 100 (Notable)
Windsor	United States	Record daily precipitation	94.5 mm (3.7 in)	48 of 100 (Notable)
Ottawa 4SW	United States	Record daily precipitation	62.5 mm (2.5 in)	47 of 100 (Notable)
Perkins	United States	Record daily precipitation	103.4 mm (4.1 in)	47 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record low maximum temperature	-7.2 C (19.0 F)	46 of 100 (Notable)
Vinita 2 N	United States	Record daily precipitation	100.6 mm (4.0 in)	44 of 100 (Notable)
Jefferson City Wtp	United States	Record daily precipitation	93.2 mm (3.7 in)	43 of 100 (Notable)
Louisiana Starks Nurse	United States	Record daily precipitation	60.7 mm (2.4 in)	43 of 100 (Notable)
El Reno 1 N	United States	Record daily precipitation	53.3 mm (2.1 in)	43 of 100 (Notable)
Lamar	United States	Record daily snowfall	10.2 cm (4.0 in)	42 of 100 (Notable)
Chicago Midway AP 3SW	United States	Record daily precipitation	54.6 mm (2.1 in)	41 of 100 (Notable)
Morris 1NW	United States	Record daily precipitation	55.9 mm (2.2 in)	41 of 100 (Notable)
Saint Johns	United States	Record high minimum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Stillwater 2 W	United States	Record daily precipitation	85.1 mm (3.4 in)	41 of 100 (Notable)
Falmouth	United States	Record daily precipitation	71.4 mm (2.8 in)	40 of 100 (Notable)
Bowling Green Wwtp	United States	Record high minimum temperature	20.0 C (68.0 F)	40 of 100 (Notable)
Okemah	United States	Record daily precipitation	94.0 mm (3.7 in)	40 of 100 (Notable)
Kit Carson	United States	Record daily snowfall	5.1 cm (2.0 in)	39 of 100 (Notable)
Ludington 4 SE	United States	Record high maximum temperature	29.4 C (84.9 F)	39 of 100 (Notable)
Wagoner	United States	Record daily precipitation	118.6 mm (4.7 in)	39 of 100 (Notable)
Chicago UNIV	United States	Record daily precipitation	86.9 mm (3.4 in)	39 of 100 (Notable)
W Branch 3SE	United States	Record high minimum temperature	20.6 C (69.1 F)	38 of 100 (Notable)
Clinton	United States	Record daily precipitation	71.9 mm (2.8 in)	38 of 100 (Notable)
Jimba Jimba	Australia	Record daily precipitation	32.0 mm (1.3 in)	37 of 100 (Notable)
Brocken	Germany	Record snow depth	280.0 cm (110.2 in)	37 of 100 (Notable)
Palayankottai	India	Record daily precipitation	32.4 mm (1.3 in)	37 of 100 (Notable)
Bluffs	United States	Record daily precipitation	48.8 mm (1.9 in)	37 of 100 (Notable)
Upper Sandusky	United States	Record high minimum temperature	19.4 C (66.9 F)	37 of 100 (Notable)
Athens	United States	Record high minimum temperature	19.4 C (66.9 F)	36 of 100 (Notable)
Ionia 2SSW	United States	Record high minimum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Petoskey	United States	Record high maximum temperature	31.1 C (88.0 F)	36 of 100 (Notable)
Warrenton 1 N	United States	Record daily precipitation	83.3 mm (3.3 in)	36 of 100 (Notable)
Eldorado	United States	Record daily precipitation	37.3 mm (1.5 in)	36 of 100 (Notable)
Gladwin	United States	Record high minimum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
Goodland	United States	Record daily snowfall	6.1 cm (2.4 in)	36 of 100 (Notable)
Salzburg	Austria	Record low minimum temperature	-0.7 C (30.7 F)	35 of 100 (Notable)
Schierke	Germany	Record snow depth	50.0 cm (19.7 in)	35 of 100 (Notable)
Zagreb-Gric	Croatia	Record low minimum temperature	2.5 C (36.5 F)	35 of 100 (Notable)
Cheyenne Wells 2NE	United States	Record daily snowfall	10.2 cm (4.0 in)	35 of 100 (Notable)
Shelbyville Sewage Plt	United States	Record daily precipitation	47.2 mm (1.9 in)	35 of 100 (Notable)
Gaylord	United States	Record high minimum temperature	17.8 C (64.0 F)	35 of 100 (Notable)
Farmington	United States	Record high minimum temperature	20.6 C (69.1 F)	35 of 100 (Notable)
Neosho	United States	Record daily precipitation	85.1 mm (3.4 in)	35 of 100 (Notable)
Cherrapunji	India	Record daily precipitation	333.2 mm (13.1 in)	34 of 100 (Routine)
Ann Arbor U of Mich	United States	Record high minimum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Cloud Chief 2 SE	United States	Record daily precipitation	33.3 mm (1.3 in)	34 of 100 (Routine)
St Louis Lambert Intl AP	United States	Record daily precipitation	59.2 mm (2.3 in)	34 of 100 (Routine)
Pelee Island	Canada	Record high minimum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Rushville	United States	Record daily precipitation	45.7 mm (1.8 in)	33 of 100 (Routine)

Counts by Type and Timescale

1,189 records

Records set or tied on 30 April 1970 by type: Highest daily maximum 174, Lowest daily maximum 114, Highest daily minimum 458, Lowest daily minimum 125, Heaviest daily rainfall 272, Heaviest daily snowfall 18, Deepest snow cover 28.

Records on 30 April 1970 by type
Record type	Records
Highest daily maximum	174
Lowest daily maximum	114
Highest daily minimum	458
Lowest daily minimum	125
Heaviest daily rainfall	272
Heaviest daily snowfall	18
Deepest snow cover	28

Records on 30 April 1970 by timescale: all-time 1, monthly 145, daily 1,043.

How Much Records Were Beaten By

897 broken records

Margins by which the 897 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1500.0. Ties are not counted.

Top 20 by Significance

30 April 1970

Top 20 records on 30 April 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 April 1970	Cassville 1 NE, US	daily rain	80.0 mm (3.1 in)	55.9 mm (2.2 in)	52 years	61 of 100 (Major)
30 April 1970	Lockwood, US	daily rain	104.4 mm (4.1 in)	67.6 mm (2.7 in)	40 years	58 of 100 (Notable)
30 April 1970	Guthrie 5S, US	daily rain	77.5 mm (3.1 in)	41.9 mm (1.6 in)	64 years	57 of 100 (Notable)
30 April 1970	White Hall 1 E, US	monthly rain	101.1 mm (4.0 in)	40.1 mm (1.6 in)	4 years	56 of 100 (Notable)
30 April 1970	Nanutarra, AU	daily rain	63.8 mm (2.5 in)	52.9 mm (2.1 in)	55 years	55 of 100 (Notable)
30 April 1970	Macon, US	daily rain	66.0 mm (2.6 in)	32.2 mm (1.3 in)	59 years	53 of 100 (Notable)
30 April 1970	Owensville, US	daily rain	66.0 mm (2.6 in)	37.6 mm (1.5 in)	43 years	53 of 100 (Notable)
30 April 1970	Caplinger Mills, US	monthly rain	120.7 mm (4.8 in)	48.3 mm (1.9 in)	6 years	52 of 100 (Notable)
30 April 1970	Cushing, US	monthly rain	99.1 mm (3.9 in)	42.5 mm (1.7 in)	10 years	52 of 100 (Notable)
30 April 1970	Winning, AU	daily rain	43.9 mm (1.7 in)	39.8 mm (1.6 in)	28 years	51 of 100 (Notable)
30 April 1970	Minderoo, AU	daily rain	71.9 mm (2.8 in)	69.1 mm (2.7 in)	13 years	49 of 100 (Notable)
30 April 1970	Versailles, US	daily rain	66.5 mm (2.6 in)	42.1 mm (1.7 in)	16 years	49 of 100 (Notable)
30 April 1970	Windsor, US	monthly rain	94.5 mm (3.7 in)	15.5 mm (0.6 in)	66 years	48 of 100 (Notable)
30 April 1970	Ottawa 4SW, US	daily rain	62.5 mm (2.5 in)	22.6 mm (0.9 in)	63 years	47 of 100 (Notable)
30 April 1970	Perkins, US	monthly rain	103.4 mm (4.1 in)	40.9 mm (1.6 in)	0 years	47 of 100 (Notable)
30 April 1970	Col du Grand St-Bernard, CH	daily low max	-7.2 C (19.0 F)	3.0 C (5.4 F)	96 years	46 of 100 (Notable)
30 April 1970	Vinita 2 N, US	daily rain	100.6 mm (4.0 in)	48.5 mm (1.9 in)	16 years	44 of 100 (Notable)
30 April 1970	Jefferson City Wtp, US	monthly rain	93.2 mm (3.7 in)	14.5 mm (0.6 in)	48 years	43 of 100 (Notable)
30 April 1970	Louisiana Starks Nurse, US	daily rain	60.7 mm (2.4 in)	25.1 mm (1.0 in)	45 years	43 of 100 (Notable)
30 April 1970	El Reno 1 N, US	daily rain	53.3 mm (2.1 in)	20.8 mm (0.8 in)	74 years	43 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

1795 to 1970

Records set or tied on this calendar date in each year from 1795 to 1970. 1970 had 1,189 records.

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

Records on 04-30 in each year
Year	Records
1795	1
1804	1
1809	1
1812	1
1814	2
1833	1
1840	1
1848	1
1850	1
1853	1
1854	1
1856	1
1859	1
1862	1
1864	1
1865	1
1866	3
1872	1
1873	1
1874	2
1876	1
1878	4
1879	2
1880	1
1881	1
1882	1
1884	1
1885	1
1886	5
1888	1
1889	1
1891	5
1892	7
1894	1
1895	5
1896	3
1897	2
1898	6
1899	11
1900	4
1901	8
1902	13
1903	21
1904	11
1905	9
1906	16
1907	35
1908	28
1909	74
1910	17
1911	19
1912	18
1913	62
1914	8
1915	20
1916	21
1917	25
1918	28
1919	130
1920	70
1921	54
1922	138
1923	42
1924	96
1925	210
1926	331
1927	127
1928	130
1929	119
1930	232
1931	548
1932	145
1933	422
1934	443
1935	327
1936	373
1937	228
1938	282
1939	268
1940	526
1941	484
1942	1,163
1943	470
1944	286
1945	314
1946	301
1947	330
1948	912
1949	447
1950	671
1951	783
1952	435
1953	635
1954	1,224
1955	1,252
1956	908
1957	401
1958	482
1959	575
1960	507
1961	381
1962	617
1963	730
1964	339
1965	488
1966	740
1967	914
1968	928
1969	587
1970	1,189
1971	365
1972	497
1973	398
1974	822
1975	468
1976	783
1977	525
1978	631
1979	675
1980	545
1981	1,342
1982	504
1983	1,154
1984	1,519
1985	650
1986	660
1987	1,437
1988	808
1989	674
1990	977
1991	828
1992	1,808
1993	765
1994	1,499
1995	1,007
1996	1,637
1997	764
1998	857
1999	1,012
2000	1,046
2001	900
2002	1,171
2003	927
2004	703
2005	1,113
2006	778
2007	996
2008	1,260
2009	660
2010	921
2011	636
2012	819
2013	732
2014	946
2015	380
2016	969
2017	1,450
2018	708
2019	700
2020	1,476
2021	1,167
2022	499
2023	782
2024	705
2025	489
2026	365

Download the Data

Data for records on 1970-04-30: 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 2026-10-17 (17 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 200	890
200 to 400	3
400 to 600	3
600 to 800	0
800 to 1000	0
1000 to 1200	0
1200 to 1400	0
1400 to 1600	1