Weather Records on 1 May 1974

589 weather records were set or tied worldwide on 1 May 1974. Highest significance: Pedro II, BR.

Key Facts for 1 May 1974

On 1 May 1974, 589 weather records were set or tied at long-record stations worldwide.
156 were record highs and 90 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 34 monthly and 552 daily.
Pedro II set a daily record precipitation of 117.4 mm (4.6 in) on 1 May 1974.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 442 records.

Record Map

589 stations

589 station records on 1 May 1974 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1974: highest significance records shown on the map
Station	Country	Type	Value	Significance
Pedro II	Brazil	Record daily precipitation	117.4 mm (4.6 in)	60 of 100 (Major)
Caucaia	Brazil	Record daily precipitation	134.0 mm (5.3 in)	58 of 100 (Notable)
Estancia	Brazil	Record daily precipitation	168.0 mm (6.6 in)	57 of 100 (Notable)
Tamboril	Brazil	Record daily precipitation	83.0 mm (3.3 in)	56 of 100 (Notable)
Lagoa Do Mato	Brazil	Record daily precipitation	176.0 mm (6.9 in)	56 of 100 (Notable)
Japaratuba	Brazil	Record daily precipitation	109.4 mm (4.3 in)	55 of 100 (Notable)
Gogo Station	Australia	Record daily precipitation	36.0 mm (1.4 in)	53 of 100 (Notable)
Maranguape	Brazil	Record daily precipitation	124.7 mm (4.9 in)	53 of 100 (Notable)
Fortaleza (Escola Regional)	Brazil	Record daily precipitation	128.5 mm (5.1 in)	51 of 100 (Notable)
Szombathely	Hungary	Record daily precipitation	36.9 mm (1.5 in)	50 of 100 (Notable)
Port Lavaca 2	United States	Record daily precipitation	98.3 mm (3.9 in)	50 of 100 (Notable)
Kerrville	United States	Record daily precipitation	176.0 mm (6.9 in)	49 of 100 (Notable)
Santa Quiteria	Brazil	Record daily precipitation	54.9 mm (2.2 in)	48 of 100 (Notable)
Uruburetama	Brazil	Record daily precipitation	127.2 mm (5.0 in)	48 of 100 (Notable)
Hudson Bay	Canada	Record daily snowfall	18.8 cm (7.4 in)	48 of 100 (Notable)
Fredericksburg	United States	Record daily precipitation	102.4 mm (4.0 in)	47 of 100 (Notable)
Matagorda #2	United States	Record daily precipitation	128.0 mm (5.0 in)	47 of 100 (Notable)
Acude Sao Vicente	Brazil	Record daily precipitation	75.4 mm (3.0 in)	46 of 100 (Notable)
Fortaleza	Brazil	Record daily precipitation	128.5 mm (5.1 in)	46 of 100 (Notable)
Sao Luiz Do Curu	Brazil	Record daily precipitation	178.9 mm (7.0 in)	45 of 100 (Notable)
Paramoti	Brazil	Record daily precipitation	112.0 mm (4.4 in)	45 of 100 (Notable)
Villagran (Smn)	Mexico	Record daily precipitation	115.8 mm (4.6 in)	45 of 100 (Notable)
Cape Leveque	Australia	Record daily precipitation	113.4 mm (4.5 in)	44 of 100 (Notable)
Budgeree East (Claremont)	Australia	Record daily precipitation	46.0 mm (1.8 in)	44 of 100 (Notable)
Itaporanga Dajuda	Brazil	Record daily precipitation	102.1 mm (4.0 in)	43 of 100 (Notable)
Zagreb-Gric	Croatia	Record daily precipitation	31.0 mm (1.2 in)	42 of 100 (Notable)
Clarion 3 SW	United States	Record daily precipitation	37.1 mm (1.5 in)	42 of 100 (Notable)
Manchester	United States	Record daily precipitation	33.5 mm (1.3 in)	41 of 100 (Notable)
Sinton	United States	Record daily precipitation	76.2 mm (3.0 in)	40 of 100 (Notable)
Frazier Downs	Australia	Record daily precipitation	38.0 mm (1.5 in)	39 of 100 (Notable)
Acude Bonito	Brazil	Record daily precipitation	48.2 mm (1.9 in)	39 of 100 (Notable)
Marathon	United States	Record daily precipitation	45.0 mm (1.8 in)	39 of 100 (Notable)
Pio IX (Patrocinio)	Brazil	Record daily precipitation	53.5 mm (2.1 in)	38 of 100 (Notable)
Santa Rita de Cassia	Brazil	Record daily precipitation	37.5 mm (1.5 in)	38 of 100 (Notable)
Valley Junction	United States	Record daily precipitation	44.7 mm (1.8 in)	38 of 100 (Notable)
Delegate Station	Australia	Record daily precipitation	32.4 mm (1.3 in)	37 of 100 (Notable)
Salgado	Brazil	Record daily precipitation	107.1 mm (4.2 in)	37 of 100 (Notable)
Mulungu	Brazil	Record daily precipitation	69.0 mm (2.7 in)	37 of 100 (Notable)
Fazenda Feijao	Brazil	Record daily precipitation	57.1 mm (2.2 in)	37 of 100 (Notable)
Castelo Do Piaui (Marvao)	Brazil	Record daily precipitation	116.9 mm (4.6 in)	37 of 100 (Notable)
Fitzroy Crossing Comp.	Australia	Record daily precipitation	25.0 mm (1.0 in)	36 of 100 (Notable)
Assuncao	Brazil	Record daily precipitation	77.1 mm (3.0 in)	36 of 100 (Notable)
Areia Branca	Brazil	Record daily precipitation	72.4 mm (2.9 in)	36 of 100 (Notable)
Cedarville	United States	Record high minimum temperature	9.4 C (48.9 F)	36 of 100 (Notable)
Plains	United States	Record daily precipitation	28.7 mm (1.1 in)	36 of 100 (Notable)
Grapeview 3 SW	United States	Record low maximum temperature	9.4 C (48.9 F)	36 of 100 (Notable)
Louisa Downs	Australia	Record daily precipitation	30.0 mm (1.2 in)	35 of 100 (Notable)
Acude Ipaguassu	Brazil	Record daily precipitation	123.4 mm (4.9 in)	35 of 100 (Notable)
Sucesso	Brazil	Record daily precipitation	51.3 mm (2.0 in)	35 of 100 (Notable)
Nossa Senhora Das Dores	Brazil	Record daily precipitation	79.3 mm (3.1 in)	35 of 100 (Notable)
Iroquois Falls	Canada	Record daily snowfall	8.9 cm (3.5 in)	35 of 100 (Notable)
Tuckerton 2 NE	United States	Record high minimum temperature	15.6 C (60.1 F)	35 of 100 (Notable)
Lakes Entrance Post Office	Australia	Record daily precipitation	56.8 mm (2.2 in)	34 of 100 (Routine)
Usina Do Chicao	Brazil	Record daily precipitation	25.0 mm (1.0 in)	34 of 100 (Routine)
Port Daniel	Canada	Record daily precipitation	36.3 mm (1.4 in)	34 of 100 (Routine)
Kuujjuarapik A	Canada	Record low maximum temperature	-12.8 C (9.0 F)	34 of 100 (Routine)
Zinapecuaro	Mexico	Record low minimum temperature	6.7 C (44.1 F)	34 of 100 (Routine)
Hondo	United States	Record daily precipitation	66.0 mm (2.6 in)	34 of 100 (Routine)
Luluigui	Australia	Record daily precipitation	36.8 mm (1.4 in)	33 of 100 (Routine)
Mount Anderson	Australia	Record daily precipitation	35.0 mm (1.4 in)	33 of 100 (Routine)

Counts by Type and Timescale

589 records

Records set or tied on 1 May 1974 by type: Highest daily maximum 35, Lowest daily maximum 53, Highest daily minimum 121, Lowest daily minimum 37, Heaviest daily rainfall 316, Heaviest daily snowfall 26, Deepest snow cover 1.

Records on 1 May 1974 by type
Record type	Records
Highest daily maximum	35
Lowest daily maximum	53
Highest daily minimum	121
Lowest daily minimum	37
Heaviest daily rainfall	316
Heaviest daily snowfall	26
Deepest snow cover	1

Records on 1 May 1974 by timescale: all-time 3, monthly 34, daily 552.

How Much Records Were Beaten By

486 broken records

Margins by which the 486 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 610.0. Ties are not counted.

Top 20 by Significance

1 May 1974

Top 20 records on 1 May 1974 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1974	Pedro II, BR	daily rain	117.4 mm (4.6 in)	65.1 mm (2.6 in)	48 years	60 of 100 (Major)
1 May 1974	Caucaia, BR	daily rain	134.0 mm (5.3 in)	84.0 mm (3.3 in)	41 years	58 of 100 (Notable)
1 May 1974	Estancia, BR	daily rain	168.0 mm (6.6 in)	101.0 mm (4.0 in)	40 years	57 of 100 (Notable)
1 May 1974	Tamboril, BR	daily rain	83.0 mm (3.3 in)	53.0 mm (2.1 in)	49 years	56 of 100 (Notable)
1 May 1974	Lagoa Do Mato, BR	monthly rain	176.0 mm (6.9 in)	98.0 mm (3.9 in)	9 years	56 of 100 (Notable)
1 May 1974	Japaratuba, BR	daily rain	109.4 mm (4.3 in)	74.7 mm (2.9 in)	33 years	55 of 100 (Notable)
1 May 1974	Gogo Station, AU	daily rain	36.0 mm (1.4 in)	36.0 mm (1.4 in)	64 years	53 of 100 (Notable)
1 May 1974	Maranguape, BR	daily rain	124.7 mm (4.9 in)	72.2 mm (2.8 in)	24 years	53 of 100 (Notable)
1 May 1974	Fortaleza (Escola Regional), BR	daily rain	128.5 mm (5.1 in)	60.2 mm (2.4 in)	45 years	51 of 100 (Notable)
1 May 1974	Szombathely, HU	daily rain	36.9 mm (1.5 in)	22.6 mm (0.9 in)	37 years	50 of 100 (Notable)
1 May 1974	Port Lavaca 2, US	daily rain	98.3 mm (3.9 in)	66.5 mm (2.6 in)	48 years	50 of 100 (Notable)
1 May 1974	Kerrville, US	monthly rain	176.0 mm (6.9 in)	50.8 mm (2.0 in)	3 years	49 of 100 (Notable)
1 May 1974	Santa Quiteria, BR	daily rain	54.9 mm (2.2 in)	28.7 mm (1.1 in)	60 years	48 of 100 (Notable)
1 May 1974	Uruburetama, BR	daily rain	127.2 mm (5.0 in)	76.2 mm (3.0 in)	8 years	48 of 100 (Notable)
1 May 1974	Hudson Bay, CA	monthly snowfall	18.8 cm (7.4 in)	8.6 cm (3.4 in)	17 years	48 of 100 (Notable)
1 May 1974	Fredericksburg, US	daily rain	102.4 mm (4.0 in)	64.6 mm (2.5 in)	7 years	47 of 100 (Notable)
1 May 1974	Matagorda #2, US	daily rain	128.0 mm (5.0 in)	87.4 mm (3.4 in)	52 years	47 of 100 (Notable)
1 May 1974	Acude Sao Vicente, BR	daily rain	75.4 mm (3.0 in)	39.4 mm (1.6 in)	48 years	46 of 100 (Notable)
1 May 1974	Fortaleza, BR	daily rain	128.5 mm (5.1 in)	51.0 mm (2.0 in)	45 years	46 of 100 (Notable)
1 May 1974	Sao Luiz Do Curu, BR	all-time rain	178.9 mm (7.0 in)	28.7 mm (1.1 in)	10 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

1795 to 1974

Records set or tied on this calendar date in each year from 1795 to 1974. 1974 had 589 records.

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

Records on 05-01 in each year
Year	Records
1795	1
1802	1
1804	1
1814	1
1818	1
1835	1
1836	1
1840	1
1846	2
1847	1
1850	1
1851	1
1857	1
1860	1
1861	1
1864	2
1865	1
1868	2
1872	1
1875	4
1878	2
1879	2
1880	3
1881	2
1884	1
1885	1
1886	2
1887	2
1888	2
1889	3
1890	2
1891	5
1892	6
1893	2
1894	5
1896	1
1897	4
1898	1
1899	8
1900	1
1901	5
1902	7
1903	9
1904	9
1905	13
1906	12
1907	31
1908	20
1909	49
1910	13
1911	22
1912	18
1913	54
1914	23
1915	27
1916	27
1917	37
1918	34
1919	150
1920	186
1921	41
1922	92
1923	64
1924	63
1925	118
1926	500
1927	125
1928	190
1929	142
1930	263
1931	537
1932	220
1933	706
1934	305
1935	276
1936	368
1937	218
1938	304
1939	227
1940	731
1941	333
1942	1,036
1943	526
1944	229
1945	350
1946	415
1947	655
1948	774
1949	405
1950	439
1951	894
1952	557
1953	917
1954	1,506
1955	772
1956	1,106
1957	359
1958	448
1959	764
1960	737
1961	588
1962	615
1963	704
1964	312
1965	360
1966	707
1967	948
1968	426
1969	429
1970	1,075
1971	444
1972	562
1973	841
1974	589
1975	286
1976	673
1977	545
1978	1,202
1979	612
1980	507
1981	1,265
1982	508
1983	1,423
1984	640
1985	789
1986	512
1987	1,098
1988	1,058
1989	949
1990	922
1991	633
1992	1,201
1993	1,101
1994	1,210
1995	1,365
1996	1,439
1997	804
1998	951
1999	932
2000	809
2001	1,106
2002	1,221
2003	964
2004	887
2005	1,320
2006	734
2007	857
2008	979
2009	679
2010	1,151
2011	716
2012	796
2013	976
2014	941
2015	550
2016	844
2017	1,163
2018	519
2019	788
2020	1,099
2021	834
2022	319
2023	912
2024	458
2025	430
2026	623

Download the Data

Data for records on 1974-05-01: 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	481
100 to 200	4
200 to 300	0
300 to 400	0
400 to 500	0
500 to 600	0
600 to 700	1