Weather Records on 30 May 1975

776 weather records were set or tied worldwide on 30 May 1975. Highest significance: Houma, US.

Key Facts for 30 May 1975

On 30 May 1975, 776 weather records were set or tied at long-record stations worldwide.
116 were record highs and 320 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 16 monthly and 759 daily.
Houma set a daily record precipitation of 130.8 mm (5.1 in) on 30 May 1975.
Across 165 earlier years (1818 to 2026) the same calendar date averaged 437 records.

Record Map

776 stations

776 station records on 30 May 1975 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 May 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Houma	United States	Record daily precipitation	130.8 mm (5.1 in)	68 of 100 (Major)
Morgan City	United States	Record daily precipitation	203.7 mm (8.0 in)	64 of 100 (Major)
Ljubljana Bezigrad	Slovenia	Record daily precipitation	79.2 mm (3.1 in)	61 of 100 (Major)
Galveston	United States	Record daily precipitation	181.4 mm (7.1 in)	53 of 100 (Notable)
Catawba 1 WSW	United States	Record daily precipitation	62.2 mm (2.4 in)	52 of 100 (Notable)
Emmett	United States	Record daily precipitation	67.8 mm (2.7 in)	51 of 100 (Notable)
Canton 4N	United States	Record daily precipitation	48.8 mm (1.9 in)	49 of 100 (Notable)
Darlington Wwtp	United States	Record daily precipitation	52.8 mm (2.1 in)	49 of 100 (Notable)
Rome	United States	Record daily precipitation	58.4 mm (2.3 in)	48 of 100 (Notable)
Joliet Brandon Road Lock/Dam	United States	Record daily precipitation	63.5 mm (2.5 in)	48 of 100 (Notable)
Gastonia	United States	Record daily precipitation	116.8 mm (4.6 in)	48 of 100 (Notable)
Challa	Australia	Record daily precipitation	27.0 mm (1.1 in)	47 of 100 (Notable)
Shelby 2 NW	United States	Record daily precipitation	81.3 mm (3.2 in)	47 of 100 (Notable)
Lake Providence	United States	Record daily precipitation	63.2 mm (2.5 in)	46 of 100 (Notable)
Maranguape	Brazil	Record daily precipitation	77.8 mm (3.1 in)	45 of 100 (Notable)
Lenoir	United States	Record daily precipitation	46.0 mm (1.8 in)	44 of 100 (Notable)
Mt Holly 4 NE	United States	Record daily precipitation	61.2 mm (2.4 in)	44 of 100 (Notable)
Charlotte Douglas AP	United States	Record daily precipitation	64.0 mm (2.5 in)	44 of 100 (Notable)
Beaver Is	United States	Record daily precipitation	50.8 mm (2.0 in)	43 of 100 (Notable)
Gaston Shoals	United States	Record daily precipitation	115.6 mm (4.6 in)	43 of 100 (Notable)
Dalton	United States	Record daily precipitation	43.4 mm (1.7 in)	43 of 100 (Notable)
Pierce 1 E	United States	Record daily precipitation	113.8 mm (4.5 in)	42 of 100 (Notable)
Wharton	United States	Record daily precipitation	144.3 mm (5.7 in)	42 of 100 (Notable)
Mount Magnet	Australia	Record daily precipitation	28.4 mm (1.1 in)	41 of 100 (Notable)
Uccle	Belgium	Record low maximum temperature	11.0 C (51.8 F)	41 of 100 (Notable)
Castle Rock	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Covert	United States	Record daily precipitation	110.5 mm (4.4 in)	41 of 100 (Notable)
Frankfort 2NE	United States	Record daily precipitation	31.5 mm (1.2 in)	41 of 100 (Notable)
Manitowoc	United States	Record daily precipitation	41.1 mm (1.6 in)	41 of 100 (Notable)
Stockton 1 E	United States	Record daily precipitation	62.5 mm (2.5 in)	40 of 100 (Notable)
Floresville	United States	Record daily precipitation	67.3 mm (2.6 in)	40 of 100 (Notable)
Yakabindie	Australia	Record daily precipitation	31.0 mm (1.2 in)	39 of 100 (Notable)
Plymouth Wwtp	United States	Record daily precipitation	37.8 mm (1.5 in)	39 of 100 (Notable)
Adairsville	United States	Record daily precipitation	47.8 mm (1.9 in)	38 of 100 (Notable)
Blowing Rock 1NW	United States	Record daily precipitation	65.3 mm (2.6 in)	38 of 100 (Notable)
Traverse Cy Cherry Capital AP	United States	Record daily precipitation	35.8 mm (1.4 in)	38 of 100 (Notable)
Edjudina	Australia	Record daily precipitation	28.2 mm (1.1 in)	37 of 100 (Notable)
Verma	Norway	Record snow depth	18.0 cm (7.1 in)	37 of 100 (Notable)
Ellis	United States	Record daily precipitation	53.3 mm (2.1 in)	37 of 100 (Notable)
Hillsdale	United States	Record daily precipitation	33.0 mm (1.3 in)	37 of 100 (Notable)
New Orleans Audubon	United States	Record daily precipitation	51.1 mm (2.0 in)	37 of 100 (Notable)
Clifton	United States	Record daily precipitation	63.5 mm (2.5 in)	36 of 100 (Notable)
Yeelirrie	Australia	Record daily precipitation	30.8 mm (1.2 in)	35 of 100 (Notable)
Yosemite Park HQ	United States	Record high minimum temperature	16.7 C (62.1 F)	35 of 100 (Notable)
Collyer 10 S	United States	Record daily precipitation	68.6 mm (2.7 in)	35 of 100 (Notable)
Tohatchi 1 ESE	United States	Record low minimum temperature	-5.0 C (23.0 F)	35 of 100 (Notable)
Tryon	United States	Record daily precipitation	86.1 mm (3.4 in)	35 of 100 (Notable)
Boogardie	Australia	Record daily precipitation	28.0 mm (1.1 in)	34 of 100 (Routine)
Albion Downs	Australia	Record daily precipitation	27.2 mm (1.1 in)	34 of 100 (Routine)
Visby_Flygplats	Sweden	Record low maximum temperature	7.5 C (45.5 F)	34 of 100 (Routine)
Karlshamn	Sweden	Record low maximum temperature	10.5 C (50.9 F)	34 of 100 (Routine)
Evergreen	United States	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Sterlington	United States	Record daily precipitation	75.4 mm (3.0 in)	34 of 100 (Routine)
Weebo	Australia	Record daily precipitation	31.2 mm (1.2 in)	33 of 100 (Routine)
Jeanerette 5 NW	United States	Record daily precipitation	47.5 mm (1.9 in)	33 of 100 (Routine)
Superior	United States	Record daily precipitation	30.5 mm (1.2 in)	33 of 100 (Routine)
Baraboo Wwtp	United States	Record daily precipitation	39.4 mm (1.6 in)	33 of 100 (Routine)
Yerilla	Australia	Record daily precipitation	27.0 mm (1.1 in)	32 of 100 (Routine)
Allenspark 2SE	United States	Record low minimum temperature	-10.6 C (12.9 F)	32 of 100 (Routine)
Galena	United States	Record daily precipitation	32.8 mm (1.3 in)	32 of 100 (Routine)

Counts by Type and Timescale

776 records

Records set or tied on 30 May 1975 by type: Highest daily maximum 32, Lowest daily maximum 162, Highest daily minimum 84, Lowest daily minimum 158, Heaviest daily rainfall 326, Heaviest daily snowfall 1, Deepest snow cover 13.

Records on 30 May 1975 by type
Record type	Records
Highest daily maximum	32
Lowest daily maximum	162
Highest daily minimum	84
Lowest daily minimum	158
Heaviest daily rainfall	326
Heaviest daily snowfall	1
Deepest snow cover	13

Records on 30 May 1975 by timescale: all-time 1, monthly 16, daily 759.

How Much Records Were Beaten By

648 broken records

Margins by which the 648 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 635.0. Ties are not counted.

Top 20 by Significance

30 May 1975

Top 20 records on 30 May 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 May 1975	Houma, US	daily rain	130.8 mm (5.1 in)	83.8 mm (3.3 in)	80 years	68 of 100 (Major)
30 May 1975	Morgan City, US	monthly rain	203.7 mm (8.0 in)	81.3 mm (3.2 in)	29 years	64 of 100 (Major)
30 May 1975	Ljubljana Bezigrad, SI	daily rain	79.2 mm (3.1 in)	49.9 mm (2.0 in)	46 years	61 of 100 (Major)
30 May 1975	Galveston, US	monthly rain	181.4 mm (7.1 in)	57.2 mm (2.3 in)	28 years	53 of 100 (Notable)
30 May 1975	Catawba 1 WSW, US	daily rain	62.2 mm (2.4 in)	47.7 mm (1.9 in)	24 years	52 of 100 (Notable)
30 May 1975	Emmett, US	daily rain	67.8 mm (2.7 in)	36.3 mm (1.4 in)	57 years	51 of 100 (Notable)
30 May 1975	Canton 4N, US	daily rain	48.8 mm (1.9 in)	34.6 mm (1.4 in)	70 years	49 of 100 (Notable)
30 May 1975	Darlington Wwtp, US	daily rain	52.8 mm (2.1 in)	34.0 mm (1.3 in)	33 years	49 of 100 (Notable)
30 May 1975	Rome, US	daily rain	58.4 mm (2.3 in)	25.4 mm (1.0 in)	72 years	48 of 100 (Notable)
30 May 1975	Joliet Brandon Road Lock/Dam, US	daily rain	63.5 mm (2.5 in)	47.0 mm (1.9 in)	18 years	48 of 100 (Notable)
30 May 1975	Gastonia, US	monthly rain	116.8 mm (4.6 in)	27.1 mm (1.1 in)	41 years	48 of 100 (Notable)
30 May 1975	Challa, AU	daily rain	27.0 mm (1.1 in)	17.9 mm (0.7 in)	54 years	47 of 100 (Notable)
30 May 1975	Shelby 2 NW, US	daily rain	81.3 mm (3.2 in)	34.8 mm (1.4 in)	36 years	47 of 100 (Notable)
30 May 1975	Lake Providence, US	daily rain	63.2 mm (2.5 in)	30.7 mm (1.2 in)	74 years	46 of 100 (Notable)
30 May 1975	Maranguape, BR	daily rain	77.8 mm (3.1 in)	36.3 mm (1.4 in)	56 years	45 of 100 (Notable)
30 May 1975	Lenoir, US	daily rain	46.0 mm (1.8 in)	7.9 mm (0.31 in)	94 years	44 of 100 (Notable)
30 May 1975	Mt Holly 4 NE, US	daily rain	61.2 mm (2.4 in)	43.9 mm (1.7 in)	17 years	44 of 100 (Notable)
30 May 1975	Charlotte Douglas AP, US	daily rain	64.0 mm (2.5 in)	35.0 mm (1.4 in)	17 years	44 of 100 (Notable)
30 May 1975	Beaver Is, US	daily rain	50.8 mm (2.0 in)	31.0 mm (1.2 in)	14 years	43 of 100 (Notable)
30 May 1975	Gaston Shoals, US	monthly rain	115.6 mm (4.6 in)	31.0 mm (1.2 in)	4 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

1818 to 1975

Records set or tied on this calendar date in each year from 1818 to 1975. 1975 had 776 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 1975-05-30: 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 100	645
100 to 200	2
200 to 300	0
300 to 400	0
400 to 500	0
500 to 600	0
600 to 700	1