Weather Records on 30 May 1970

483 weather records were set or tied worldwide on 30 May 1970. Highest significance: Experiment, US.

Key Facts for 30 May 1970

On 30 May 1970, 483 weather records were set or tied at long-record stations worldwide.
69 were record highs and 68 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 13 monthly and 470 daily.
Experiment set a daily record precipitation of 86.1 mm (3.4 in) on 30 May 1970.
Across 165 earlier years (1818 to 2026) the same calendar date averaged 438 records.

Record Map

483 stations

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

Weather records on 30 May 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Experiment	United States	Record daily precipitation	86.1 mm (3.4 in)	65 of 100 (Major)
Sakoli	India	Record daily precipitation	89.0 mm (3.5 in)	62 of 100 (Major)
Malung	Sweden	Record daily precipitation	25.4 mm (1.0 in)	60 of 100 (Major)
North Bay	Canada	Record daily precipitation	43.2 mm (1.7 in)	59 of 100 (Notable)
Cape Naturaliste	Australia	Record daily precipitation	57.9 mm (2.3 in)	58 of 100 (Notable)
Minderoo	Australia	Record daily precipitation	75.2 mm (3.0 in)	57 of 100 (Notable)
Minilya	Australia	Record daily precipitation	85.9 mm (3.4 in)	55 of 100 (Notable)
Millstream	Australia	Record daily precipitation	58.2 mm (2.3 in)	54 of 100 (Notable)
Quindalup	Australia	Record daily precipitation	68.1 mm (2.7 in)	54 of 100 (Notable)
Gore Bay	Canada	Record daily precipitation	46.2 mm (1.8 in)	54 of 100 (Notable)
Warroora	Australia	Record daily precipitation	65.0 mm (2.6 in)	53 of 100 (Notable)
Genoa	Italy	Record daily precipitation	98.8 mm (3.9 in)	53 of 100 (Notable)
Park Falls Dnr HQ	United States	Record daily precipitation	88.1 mm (3.5 in)	53 of 100 (Notable)
Ishpeming	United States	Record daily precipitation	43.2 mm (1.7 in)	50 of 100 (Notable)
Holly Bluff	United States	Record daily precipitation	74.2 mm (2.9 in)	50 of 100 (Notable)
Alamur(Alamar)	India	Record daily precipitation	76.2 mm (3.0 in)	49 of 100 (Notable)
Danevang 1 W	United States	Record daily precipitation	97.8 mm (3.9 in)	49 of 100 (Notable)
Woodbrook	Australia	Record daily precipitation	83.8 mm (3.3 in)	48 of 100 (Notable)
Parvatipur	India	Record daily precipitation	101.2 mm (4.0 in)	48 of 100 (Notable)
Matagorda #2	United States	Record daily precipitation	132.1 mm (5.2 in)	48 of 100 (Notable)
Bingham Chute	Canada	Record daily precipitation	27.2 mm (1.1 in)	47 of 100 (Notable)
Glenwood 4 NNE	United States	Record daily precipitation	123.7 mm (4.9 in)	47 of 100 (Notable)
Minnie Creek	Australia	Record daily precipitation	50.8 mm (2.0 in)	46 of 100 (Notable)
Morsi	India	Record daily precipitation	40.2 mm (1.6 in)	46 of 100 (Notable)
Lynton	Australia	Record daily precipitation	66.0 mm (2.6 in)	45 of 100 (Notable)
Morrison	United States	Record daily precipitation	76.2 mm (3.0 in)	45 of 100 (Notable)
Cooralya	Australia	Record daily precipitation	54.4 mm (2.1 in)	44 of 100 (Notable)
Maffra Forestry Office	Australia	Record daily precipitation	33.8 mm (1.3 in)	44 of 100 (Notable)
Chaurai	India	Record daily precipitation	63.5 mm (2.5 in)	44 of 100 (Notable)
Karlshamn	Sweden	Record daily precipitation	26.6 mm (1.0 in)	44 of 100 (Notable)
Boolathana	Australia	Record daily precipitation	58.4 mm (2.3 in)	43 of 100 (Notable)
Emu Creek Station	Australia	Record daily precipitation	56.1 mm (2.2 in)	43 of 100 (Notable)
Armoor(Armur)	India	Record daily precipitation	46.2 mm (1.8 in)	43 of 100 (Notable)
Kooline	Australia	Record daily precipitation	52.3 mm (2.1 in)	42 of 100 (Notable)
Moogooree	Australia	Record daily precipitation	47.0 mm (1.9 in)	42 of 100 (Notable)
Newnan 7 WNW	United States	Record daily precipitation	41.1 mm (1.6 in)	42 of 100 (Notable)
Mardathuna	Australia	Record daily precipitation	59.4 mm (2.3 in)	41 of 100 (Notable)
Wandagee	Australia	Record daily precipitation	54.9 mm (2.2 in)	41 of 100 (Notable)
Mardie	Australia	Record daily precipitation	74.4 mm (2.9 in)	40 of 100 (Notable)
Red Hill	Australia	Record daily precipitation	61.2 mm (2.4 in)	40 of 100 (Notable)
Brickhouse	Australia	Record daily precipitation	54.1 mm (2.1 in)	40 of 100 (Notable)
Meka Station	Australia	Record daily precipitation	39.4 mm (1.6 in)	40 of 100 (Notable)
Nandgaon	India	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Doctortown 1 WSW	United States	Record daily precipitation	73.9 mm (2.9 in)	40 of 100 (Notable)
Yanrey	Australia	Record daily precipitation	49.5 mm (1.9 in)	39 of 100 (Notable)
Mount Stuart	Australia	Record daily precipitation	58.2 mm (2.3 in)	38 of 100 (Notable)
Maroonah	Australia	Record daily precipitation	67.3 mm (2.6 in)	38 of 100 (Notable)
Boaz	United States	Record daily precipitation	60.5 mm (2.4 in)	38 of 100 (Notable)
Wadley	United States	Record daily precipitation	55.6 mm (2.2 in)	38 of 100 (Notable)
De Grey	Australia	Record daily precipitation	48.3 mm (1.9 in)	37 of 100 (Notable)
Lyndon	Australia	Record daily precipitation	51.1 mm (2.0 in)	37 of 100 (Notable)
Barrage Angliers	Canada	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Flambeau Rsvr	United States	Record daily precipitation	91.9 mm (3.6 in)	37 of 100 (Notable)
Byro	Australia	Record daily precipitation	32.5 mm (1.3 in)	36 of 100 (Notable)
Du Quoin 4 SE	United States	Record daily precipitation	45.7 mm (1.8 in)	36 of 100 (Notable)
Nanutarra	Australia	Record daily precipitation	30.0 mm (1.2 in)	35 of 100 (Notable)
Doorawarrah	Australia	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
Milly Milly	Australia	Record daily precipitation	25.9 mm (1.0 in)	35 of 100 (Notable)
Marquette	United States	Record daily precipitation	46.0 mm (1.8 in)	35 of 100 (Notable)
Glen Florrie Station	Australia	Record daily precipitation	30.5 mm (1.2 in)	34 of 100 (Routine)

Counts by Type and Timescale

483 records

Records set or tied on 30 May 1970 by type: Highest daily maximum 26, Lowest daily maximum 41, Highest daily minimum 43, Lowest daily minimum 27, Heaviest daily rainfall 344, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 30 May 1970 by type
Record type	Records
Highest daily maximum	26
Lowest daily maximum	41
Highest daily minimum	43
Lowest daily minimum	27
Heaviest daily rainfall	344
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 30 May 1970 by timescale: all-time 0, monthly 13, daily 470.

How Much Records Were Beaten By

419 broken records

Margins by which the 419 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 250.0. Ties are not counted.

Top 20 by Significance

30 May 1970

Top 20 records on 30 May 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 May 1970	Experiment, US	daily rain	86.1 mm (3.4 in)	60.7 mm (2.4 in)	61 years	65 of 100 (Major)
30 May 1970	Sakoli, IN	daily rain	89.0 mm (3.5 in)	78.8 mm (3.1 in)	52 years	62 of 100 (Major)
30 May 1970	Malung, SE	daily rain	25.4 mm (1.0 in)	12.3 mm (0.5 in)	87 years	60 of 100 (Major)
30 May 1970	North Bay, CA	daily rain	43.2 mm (1.7 in)	28.0 mm (1.1 in)	39 years	59 of 100 (Notable)
30 May 1970	Cape Naturaliste, AU	daily rain	57.9 mm (2.3 in)	39.4 mm (1.6 in)	43 years	58 of 100 (Notable)
30 May 1970	Minderoo, AU	daily rain	75.2 mm (3.0 in)	64.0 mm (2.5 in)	40 years	57 of 100 (Notable)
30 May 1970	Minilya, AU	daily rain	85.9 mm (3.4 in)	58.0 mm (2.3 in)	40 years	55 of 100 (Notable)
30 May 1970	Millstream, AU	daily rain	58.2 mm (2.3 in)	51.1 mm (2.0 in)	40 years	54 of 100 (Notable)
30 May 1970	Quindalup, AU	daily rain	68.1 mm (2.7 in)	40.2 mm (1.6 in)	37 years	54 of 100 (Notable)
30 May 1970	Gore Bay, CA	daily rain	46.2 mm (1.8 in)	33.2 mm (1.3 in)	16 years	54 of 100 (Notable)
30 May 1970	Warroora, AU	daily rain	65.0 mm (2.6 in)	60.2 mm (2.4 in)	48 years	53 of 100 (Notable)
30 May 1970	Genoa, IT	monthly rain	98.8 mm (3.9 in)	7.4 mm (0.29 in)	93 years	53 of 100 (Notable)
30 May 1970	Park Falls Dnr HQ, US	monthly rain	88.1 mm (3.5 in)	29.4 mm (1.2 in)	17 years	53 of 100 (Notable)
30 May 1970	Ishpeming, US	daily rain	43.2 mm (1.7 in)	22.9 mm (0.9 in)	48 years	50 of 100 (Notable)
30 May 1970	Holly Bluff, US	daily rain	74.2 mm (2.9 in)	54.6 mm (2.1 in)	20 years	50 of 100 (Notable)
30 May 1970	Alamur(Alamar), IN	daily rain	76.2 mm (3.0 in)	47.2 mm (1.9 in)	64 years	49 of 100 (Notable)
30 May 1970	Danevang 1 W, US	daily rain	97.8 mm (3.9 in)	53.3 mm (2.1 in)	63 years	49 of 100 (Notable)
30 May 1970	Woodbrook, AU	daily rain	83.8 mm (3.3 in)	62.0 mm (2.4 in)	40 years	48 of 100 (Notable)
30 May 1970	Parvatipur, IN	daily rain	101.2 mm (4.0 in)	56.2 mm (2.2 in)	25 years	48 of 100 (Notable)
30 May 1970	Matagorda #2, US	daily rain	132.1 mm (5.2 in)	99.8 mm (3.9 in)	40 years	48 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

1818 to 1970

Records set or tied on this calendar date in each year from 1818 to 1970. 1970 had 483 records.

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

Records on 05-30 in each year
Year	Records
1818	3
1844	1
1847	1
1848	1
1852	1
1853	1
1855	1
1856	1
1858	1
1860	2
1863	1
1864	1
1865	4
1867	1
1868	4
1870	1
1871	2
1873	4
1878	1
1879	1
1880	2
1881	1
1882	2
1883	1
1884	2
1885	1
1886	1
1887	1
1889	3
1890	1
1891	1
1892	2
1893	7
1894	2
1895	5
1896	1
1897	1
1898	2
1899	4
1900	1
1901	4
1902	9
1903	12
1904	7
1905	20
1906	8
1907	20
1908	32
1909	6
1910	22
1911	22
1912	26
1913	89
1914	25
1915	32
1916	41
1917	42
1918	31
1919	90
1920	28
1921	392
1922	72
1923	121
1924	187
1925	190
1926	201
1927	177
1928	86
1929	368
1930	530
1931	316
1932	256
1933	250
1934	731
1935	88
1936	579
1937	440
1938	309
1939	336
1940	289
1941	518
1942	500
1943	444
1944	325
1945	383
1946	310
1947	880
1948	386
1949	318
1950	376
1951	448
1952	295
1953	622
1954	271
1955	377
1956	466
1957	267
1958	480
1959	419
1960	274
1961	657
1962	454
1963	245
1964	709
1965	454
1966	326
1967	859
1968	357
1969	1,092
1970	483
1971	1,044
1972	721
1973	391
1974	631
1975	776
1976	499
1977	444
1978	888
1979	1,185
1980	650
1981	1,001
1982	981
1983	1,310
1984	2,543
1985	772
1986	1,264
1987	1,021
1988	1,371
1989	1,021
1990	983
1991	1,264
1992	1,413
1993	690
1994	834
1995	777
1996	893
1997	936
1998	1,190
1999	1,113
2000	1,391
2001	854
2002	940
2003	1,110
2004	1,219
2005	737
2006	1,179
2007	1,128
2008	829
2009	480
2010	771
2011	1,914
2012	720
2013	821
2014	551
2015	699
2016	540
2017	657
2018	1,319
2019	706
2020	920
2021	841
2022	1,034
2023	344
2024	600
2025	828
2026	525

Download the Data

Data for records on 1970-05-30: 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 50	402
50 to 100	16
100 to 150	0
150 to 200	0
200 to 250	1