Weather Records on 30 May 1974

631 weather records were set or tied worldwide on 30 May 1974. Highest significance: Salem, US.

Key Facts for 30 May 1974

On 30 May 1974, 631 weather records were set or tied at long-record stations worldwide.
223 were record highs and 146 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 30 monthly and 598 daily.
Salem set a daily record precipitation of 61.2 mm (2.4 in) on 30 May 1974.
Across 165 earlier years (1818 to 2026) the same calendar date averaged 437 records.

Record Map

631 stations

631 station records on 30 May 1974 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 May 1974: highest significance records shown on the map
Station	Country	Type	Value	Significance
Salem	United States	Record daily precipitation	61.2 mm (2.4 in)	62 of 100 (Major)
Ibiapaba	Brazil	Record daily precipitation	89.0 mm (3.5 in)	60 of 100 (Major)
Flemingsburg 2 N	United States	Record daily precipitation	95.0 mm (3.7 in)	60 of 100 (Major)
Logan	United States	Record daily precipitation	99.3 mm (3.9 in)	60 of 100 (Major)
Clay	United States	Record daily precipitation	56.6 mm (2.2 in)	57 of 100 (Notable)
Itapeim	Brazil	Record daily precipitation	99.1 mm (3.9 in)	55 of 100 (Notable)
Pedro Avelino	Brazil	Record daily precipitation	58.0 mm (2.3 in)	55 of 100 (Notable)
Bloomington Indiana UNIV	United States	Record daily precipitation	55.9 mm (2.2 in)	55 of 100 (Notable)
Santo Antonio	Brazil	Record daily precipitation	133.4 mm (5.3 in)	53 of 100 (Notable)
Flora 5 NW	United States	Record daily precipitation	42.7 mm (1.7 in)	53 of 100 (Notable)
Miraima	Brazil	Record daily precipitation	54.9 mm (2.2 in)	52 of 100 (Notable)
Carlinville	United States	Record daily precipitation	63.2 mm (2.5 in)	52 of 100 (Notable)
Scottsburg	United States	Record daily precipitation	53.8 mm (2.1 in)	52 of 100 (Notable)
Santa Luzia	Brazil	Record daily precipitation	52.0 mm (2.0 in)	51 of 100 (Notable)
Pocinhos (Joffily)	Brazil	Record daily precipitation	49.0 mm (1.9 in)	51 of 100 (Notable)
Branchland 1 N	United States	Record daily precipitation	50.0 mm (2.0 in)	51 of 100 (Notable)
Dom Mauricio	Brazil	Record daily precipitation	86.5 mm (3.4 in)	49 of 100 (Notable)
Isabela Substn	Puerto Rico [United States]	Record daily precipitation	109.2 mm (4.3 in)	49 of 100 (Notable)
Carrollton Lock 1	United States	Record daily precipitation	43.9 mm (1.7 in)	48 of 100 (Notable)
Springfield 2W	United States	Record daily precipitation	40.6 mm (1.6 in)	48 of 100 (Notable)
Louisiana Starks Nurse	United States	Record daily precipitation	73.7 mm (2.9 in)	48 of 100 (Notable)
Frecheirinha	Brazil	Record daily precipitation	65.8 mm (2.6 in)	45 of 100 (Notable)
Fazenda Jardim	Brazil	Record daily precipitation	81.8 mm (3.2 in)	45 of 100 (Notable)
Falmouth	United States	Record daily precipitation	69.1 mm (2.7 in)	45 of 100 (Notable)
Santana Do Matos	Brazil	Record daily precipitation	66.0 mm (2.6 in)	44 of 100 (Notable)
Marcelino Vieira (Panatis)	Brazil	Record daily precipitation	94.0 mm (3.7 in)	44 of 100 (Notable)
Assuncao	Brazil	Record daily precipitation	48.3 mm (1.9 in)	43 of 100 (Notable)
Salvacao	Brazil	Record daily precipitation	43.0 mm (1.7 in)	43 of 100 (Notable)
Marshall	United States	Record daily precipitation	69.9 mm (2.8 in)	43 of 100 (Notable)
Plevna	United States	Record daily precipitation	50.8 mm (2.0 in)	43 of 100 (Notable)
Cristais	Brazil	Record daily precipitation	64.0 mm (2.5 in)	42 of 100 (Notable)
Virden	United States	Record daily precipitation	65.3 mm (2.6 in)	42 of 100 (Notable)
Maysville Wwtp	United States	Record daily precipitation	53.3 mm (2.1 in)	42 of 100 (Notable)
Knoxville AP	United States	Record daily precipitation	85.3 mm (3.4 in)	42 of 100 (Notable)
Guaraciaba Do Norte	Brazil	Record daily precipitation	58.4 mm (2.3 in)	41 of 100 (Notable)
Itapage	Brazil	Record daily precipitation	56.3 mm (2.2 in)	40 of 100 (Notable)
Riachao Do Banabuiu	Brazil	Record daily precipitation	96.4 mm (3.8 in)	40 of 100 (Notable)
Lincoln UNIV Pwr Plt	United States	Record daily precipitation	41.1 mm (1.6 in)	40 of 100 (Notable)
Mount Irving	Australia	Record daily precipitation	28.0 mm (1.1 in)	39 of 100 (Notable)
Rushville	United States	Record daily precipitation	76.2 mm (3.0 in)	39 of 100 (Notable)
Leitchfield 2 N	United States	Record daily precipitation	47.8 mm (1.9 in)	39 of 100 (Notable)
Caico	Brazil	Record daily precipitation	47.6 mm (1.9 in)	38 of 100 (Notable)
Pedra Lavrada	Brazil	Record daily precipitation	30.2 mm (1.2 in)	38 of 100 (Notable)
Maceio (Aeroporto)	Brazil	Record daily precipitation	105.2 mm (4.1 in)	38 of 100 (Notable)
Millport 4 NE	United States	Record daily precipitation	48.8 mm (1.9 in)	38 of 100 (Notable)
Ford City 4 S Dam	United States	Record daily precipitation	30.2 mm (1.2 in)	38 of 100 (Notable)
Spencer	United States	Record daily precipitation	42.4 mm (1.7 in)	38 of 100 (Notable)
St Louis Lambert Intl AP	United States	Record daily precipitation	66.8 mm (2.6 in)	38 of 100 (Notable)
Hamlin	United States	Record daily precipitation	32.5 mm (1.3 in)	37 of 100 (Notable)
Grindstone Island	Canada	Record low minimum temperature	0.6 C (33.1 F)	36 of 100 (Notable)
W Liberty 3NW	United States	Record daily precipitation	28.4 mm (1.1 in)	36 of 100 (Notable)
Gest Lock 3	United States	Record daily precipitation	47.0 mm (1.9 in)	35 of 100 (Notable)
Munfordville 5 NW	United States	Record daily precipitation	40.6 mm (1.6 in)	35 of 100 (Notable)
Mildred	United States	Record daily precipitation	37.6 mm (1.5 in)	35 of 100 (Notable)
Tapalpa (Smn)	Mexico	Record low minimum temperature	3.9 C (39.0 F)	34 of 100 (Routine)
Yates Ctr	United States	Record high minimum temperature	21.1 C (70.0 F)	34 of 100 (Routine)
Cynthiana	United States	Record daily precipitation	41.1 mm (1.6 in)	34 of 100 (Routine)
Wilmington 3 N	United States	Record daily precipitation	34.3 mm (1.4 in)	34 of 100 (Routine)
Corvallis State UNIV	United States	Record low minimum temperature	1.1 C (34.0 F)	34 of 100 (Routine)
Bananeiras	Brazil	Record daily precipitation	111.0 mm (4.4 in)	33 of 100 (Routine)

Counts by Type and Timescale

631 records

Records set or tied on 30 May 1974 by type: Highest daily maximum 46, Lowest daily maximum 53, Highest daily minimum 177, Lowest daily minimum 93, Heaviest daily rainfall 261, Deepest snow cover 1.

Records on 30 May 1974 by type
Record type	Records
Highest daily maximum	46
Lowest daily maximum	53
Highest daily minimum	177
Lowest daily minimum	93
Heaviest daily rainfall	261
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 30 May 1974 by timescale: all-time 3, monthly 30, daily 598.

How Much Records Were Beaten By

499 broken records

Margins by which the 499 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 839.0. Ties are not counted.

Top 20 by Significance

30 May 1974

Top 20 records on 30 May 1974 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 May 1974	Salem, US	daily rain	61.2 mm (2.4 in)	39.9 mm (1.6 in)	73 years	62 of 100 (Major)
30 May 1974	Ibiapaba, BR	daily rain	89.0 mm (3.5 in)	63.0 mm (2.5 in)	52 years	60 of 100 (Major)
30 May 1974	Flemingsburg 2 N, US	monthly rain	95.0 mm (3.7 in)	36.6 mm (1.4 in)	39 years	60 of 100 (Major)
30 May 1974	Logan, US	monthly rain	99.3 mm (3.9 in)	25.6 mm (1.0 in)	57 years	60 of 100 (Major)
30 May 1974	Clay, US	daily rain	56.6 mm (2.2 in)	29.4 mm (1.2 in)	59 years	57 of 100 (Notable)
30 May 1974	Itapeim, BR	daily rain	99.1 mm (3.9 in)	73.3 mm (2.9 in)	36 years	55 of 100 (Notable)
30 May 1974	Pedro Avelino, BR	daily rain	58.0 mm (2.3 in)	51.2 mm (2.0 in)	39 years	55 of 100 (Notable)
30 May 1974	Bloomington Indiana UNIV, US	daily rain	55.9 mm (2.2 in)	29.5 mm (1.2 in)	74 years	55 of 100 (Notable)
30 May 1974	Santo Antonio, BR	all-time rain	133.4 mm (5.3 in)	22.5 mm (0.9 in)	42 years	53 of 100 (Notable)
30 May 1974	Flora 5 NW, US	daily rain	42.7 mm (1.7 in)	30.0 mm (1.2 in)	73 years	53 of 100 (Notable)
30 May 1974	Miraima, BR	daily rain	54.9 mm (2.2 in)	48.5 mm (1.9 in)	51 years	52 of 100 (Notable)
30 May 1974	Carlinville, US	daily rain	63.2 mm (2.5 in)	30.9 mm (1.2 in)	56 years	52 of 100 (Notable)
30 May 1974	Scottsburg, US	daily rain	53.8 mm (2.1 in)	23.8 mm (0.9 in)	73 years	52 of 100 (Notable)
30 May 1974	Santa Luzia, BR	daily rain	52.0 mm (2.0 in)	36.2 mm (1.4 in)	60 years	51 of 100 (Notable)
30 May 1974	Pocinhos (Joffily), BR	daily rain	49.0 mm (1.9 in)	36.7 mm (1.4 in)	20 years	51 of 100 (Notable)
30 May 1974	Branchland 1 N, US	daily rain	50.0 mm (2.0 in)	37.8 mm (1.5 in)	28 years	51 of 100 (Notable)
30 May 1974	Dom Mauricio, BR	daily rain	86.5 mm (3.4 in)	46.5 mm (1.8 in)	36 years	49 of 100 (Notable)
30 May 1974	Isabela Substn, PR	daily rain	109.2 mm (4.3 in)	72.4 mm (2.9 in)	8 years	49 of 100 (Notable)
30 May 1974	Carrollton Lock 1, US	daily rain	43.9 mm (1.7 in)	31.2 mm (1.2 in)	45 years	48 of 100 (Notable)
30 May 1974	Springfield 2W, US	daily rain	40.6 mm (1.6 in)	19.0 mm (0.7 in)	80 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 1974

Records set or tied on this calendar date in each year from 1818 to 1974. 1974 had 631 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 1974-05-30: 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 200	498
200 to 400	0
400 to 600	0
600 to 800	0
800 to 1000	1