Weather Records on 1 May 1930

263 weather records were set or tied worldwide on 1 May 1930. Highest significance: Bajramaly, TM.

Key Facts for 1 May 1930

On 1 May 1930, 263 weather records were set or tied at long-record stations worldwide.
206 were record highs and 5 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 261 daily.
Bajramaly set a monthly record daily precipitation of 28.7 mm (1.1 in) on 1 May 1930.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 443 records.

Record Map

263 stations

263 station records on 1 May 1930 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1930: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bajramaly	Turkmenistan	Record daily precipitation	28.7 mm (1.1 in)	61 of 100 (Major)
El Cajon 2 E	United States	Record daily precipitation	43.2 mm (1.7 in)	52 of 100 (Notable)
Rowlesburg 1	United States	Record daily precipitation	50.8 mm (2.0 in)	38 of 100 (Notable)
Collector (Brookdale)	Australia	Record daily precipitation	25.4 mm (1.0 in)	37 of 100 (Notable)
George Airport	South Africa	Record daily precipitation	38.3 mm (1.5 in)	35 of 100 (Notable)
Buffelsnek (Bos)	South Africa	Record daily precipitation	45.7 mm (1.8 in)	31 of 100 (Routine)
Kenora	Canada	Record daily precipitation	36.1 mm (1.4 in)	29 of 100 (Routine)
Escanaba	United States	Record high maximum temperature	26.7 C (80.1 F)	29 of 100 (Routine)
Port Macquarie (Bellevue Garde	Australia	Record daily precipitation	59.9 mm (2.4 in)	28 of 100 (Routine)
Boston City WSO	United States	Record high minimum temperature	21.1 C (70.0 F)	26 of 100 (Routine)
Ottawa	Canada	Record high maximum temperature	26.7 C (80.1 F)	25 of 100 (Routine)
Pembroke Eddy Match	Canada	Record high maximum temperature	26.1 C (79.0 F)	25 of 100 (Routine)
Collegeville St Joe AP	United States	Record high minimum temperature	17.8 C (64.0 F)	25 of 100 (Routine)
Charlottetown	Canada	Record high maximum temperature	20.6 C (69.1 F)	24 of 100 (Routine)
Bloukrans (Bos)	South Africa	Record daily precipitation	63.8 mm (2.5 in)	24 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	26.7 C (80.1 F)	23 of 100 (Routine)
Ulmarra (Newsagency)	Australia	Record daily precipitation	40.6 mm (1.6 in)	22 of 100 (Routine)
Woolgoolga (Clear Place)	Australia	Record daily precipitation	44.7 mm (1.8 in)	22 of 100 (Routine)
Brushgrove Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	21 of 100 (Routine)
Parry Sound	Canada	Record high minimum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Racine Wwtp	United States	Record high minimum temperature	10.6 C (51.1 F)	21 of 100 (Routine)
Great Brak River	South Africa	Record daily precipitation	22.6 mm (0.9 in)	20 of 100 (Routine)
Riversdale	South Africa	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Bendemeer (Caroline St)	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Storlien	Sweden	Record daily precipitation	6.7 mm (0.26 in)	20 of 100 (Routine)
Bundaberg Post Office	Australia	Record low minimum temperature	7.2 C (45.0 F)	20 of 100 (Routine)
Morangarell	Australia	Record daily precipitation	6.9 mm (0.27 in)	19 of 100 (Routine)
Oktjabrskij-Gorodok	Russia	Record daily precipitation	11.2 mm (0.4 in)	19 of 100 (Routine)
Olin	United States	Record high minimum temperature	17.2 C (63.0 F)	19 of 100 (Routine)
Old Mission	United States	Record high minimum temperature	13.9 C (57.0 F)	19 of 100 (Routine)
Owosso Wwtp	United States	Record high minimum temperature	15.6 C (60.1 F)	19 of 100 (Routine)
Park Rapids Muni AP	United States	Record high minimum temperature	11.1 C (52.0 F)	19 of 100 (Routine)
Maclean (McLachlan Street)	Australia	Record daily precipitation	35.6 mm (1.4 in)	18 of 100 (Routine)
Bellbrook (East Street)	Australia	Record daily precipitation	25.4 mm (1.0 in)	18 of 100 (Routine)
Bellingen Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	18 of 100 (Routine)
Sussex	Canada	Record high maximum temperature	21.7 C (71.1 F)	18 of 100 (Routine)
Goudveld (Bos)	South Africa	Record daily precipitation	22.1 mm (0.9 in)	18 of 100 (Routine)
Mt Carroll	United States	Record high minimum temperature	16.1 C (61.0 F)	18 of 100 (Routine)
Iowa City	United States	Record high minimum temperature	17.8 C (64.0 F)	18 of 100 (Routine)
Darlington	United States	Record high maximum temperature	30.6 C (87.1 F)	18 of 100 (Routine)
Waukesha Wwtp	United States	Record high minimum temperature	15.6 C (60.1 F)	18 of 100 (Routine)
Port Said	Egypt	Record high minimum temperature	22.0 C (71.6 F)	17 of 100 (Routine)
Micurinsk	Russia	Record daily precipitation	10.8 mm (0.4 in)	17 of 100 (Routine)
Oudtshoorn	South Africa	Record daily precipitation	9.7 mm (0.38 in)	17 of 100 (Routine)
Independence	United States	Record high minimum temperature	15.6 C (60.1 F)	17 of 100 (Routine)
Lexington	United States	Record high minimum temperature	15.6 C (60.1 F)	17 of 100 (Routine)
Colfax	United States	Record high minimum temperature	10.6 C (51.1 F)	17 of 100 (Routine)
Havre Wb City	United States	Record high minimum temperature	10.0 C (50.0 F)	17 of 100 (Routine)
Helena Wb City	United States	Record high minimum temperature	10.6 C (51.1 F)	17 of 100 (Routine)
Owen Sound	Canada	Record high minimum temperature	15.6 C (60.1 F)	16 of 100 (Routine)
Atyrau	Kazakhstan	Record low minimum temperature	1.8 C (35.2 F)	16 of 100 (Routine)
Waterbury	United States	Record high maximum temperature	28.9 C (84.0 F)	16 of 100 (Routine)
Dixon Wwtp	United States	Record high minimum temperature	17.2 C (63.0 F)	16 of 100 (Routine)
Marengo	United States	Record high minimum temperature	16.1 C (61.0 F)	16 of 100 (Routine)
Belle Plaine	United States	Record high minimum temperature	17.8 C (64.0 F)	16 of 100 (Routine)
Clinton #1	United States	Record high minimum temperature	16.7 C (62.1 F)	16 of 100 (Routine)
Iowa Falls	United States	Record high minimum temperature	16.1 C (61.0 F)	16 of 100 (Routine)
Marshalltown	United States	Record high minimum temperature	17.2 C (63.0 F)	16 of 100 (Routine)
Haverhill	United States	Record high maximum temperature	28.9 C (84.0 F)	16 of 100 (Routine)
Grayling	United States	Record high minimum temperature	13.9 C (57.0 F)	16 of 100 (Routine)

Counts by Type and Timescale

263 records

Records set or tied on 1 May 1930 by type: Highest daily maximum 69, Lowest daily maximum 1, Highest daily minimum 137, Lowest daily minimum 4, Heaviest daily rainfall 52.

Records on 1 May 1930 by type
Record type	Records
Highest daily maximum	69
Lowest daily maximum	1
Highest daily minimum	137
Lowest daily minimum	4
Heaviest daily rainfall	52
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 May 1930 by timescale: all-time 0, monthly 2, daily 261.

How Much Records Were Beaten By

202 broken records

Margins by which the 202 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 33.1. Ties are not counted.

Top 20 by Significance

1 May 1930

Top 20 records on 1 May 1930 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1930	Bajramaly, TM	monthly rain	28.7 mm (1.1 in)	13.6 mm (0.5 in)	25 years	61 of 100 (Major)
1 May 1930	El Cajon 2 E, US	monthly rain	43.2 mm (1.7 in)	19.6 mm (0.8 in)	8 years	52 of 100 (Notable)
1 May 1930	Rowlesburg 1, US	daily rain	50.8 mm (2.0 in)	29.0 mm (1.1 in)	3 years	38 of 100 (Notable)
1 May 1930	Collector (Brookdale), AU	daily rain	25.4 mm (1.0 in)	25.1 mm (1.0 in)	37 years	37 of 100 (Notable)
1 May 1930	George Airport, ZA	daily rain	38.3 mm (1.5 in)	22.8 mm (0.9 in)	48 years	35 of 100 (Notable)
1 May 1930	Buffelsnek (Bos), ZA	daily rain	45.7 mm (1.8 in)	27.9 mm (1.1 in)	11 years	31 of 100 (Routine)
1 May 1930	Kenora, CA	daily rain	36.1 mm (1.4 in)	20.9 mm (0.8 in)	24 years	29 of 100 (Routine)
1 May 1930	Escanaba, US	daily high max	26.7 C (80.1 F)	8.4 C (15.1 F)	25 years	29 of 100 (Routine)
1 May 1930	Port Macquarie (Bellevue Garde, AU	daily rain	59.9 mm (2.4 in)	25.4 mm (1.0 in)	28 years	28 of 100 (Routine)
1 May 1930	Boston City WSO, US	daily high min	21.1 C (70.0 F)	5.0 C (9.0 F)	30 years	26 of 100 (Routine)
1 May 1930	Ottawa, CA	daily high max	26.7 C (80.1 F)	4.5 C (8.1 F)	43 years	25 of 100 (Routine)
1 May 1930	Pembroke Eddy Match, CA	daily high max	26.1 C (79.0 F)	3.9 C (7.0 F)	43 years	25 of 100 (Routine)
1 May 1930	Collegeville St Joe AP, US	daily high min	17.8 C (64.0 F)	8.4 C (15.1 F)	24 years	25 of 100 (Routine)
1 May 1930	Charlottetown, CA	daily high max	20.6 C (69.1 F)	3.9 C (7.0 F)	39 years	24 of 100 (Routine)
1 May 1930	Bloukrans (Bos), ZA	daily rain	63.8 mm (2.5 in)	33.1 mm (1.3 in)	11 years	24 of 100 (Routine)
1 May 1930	Cape May 2 NW, US	daily high max	26.7 C (80.1 F)	3.4 C (6.1 F)	35 years	23 of 100 (Routine)
1 May 1930	Ulmarra (Newsagency), AU	daily rain	40.6 mm (1.6 in)	30.4 mm (1.2 in)	15 years	22 of 100 (Routine)
1 May 1930	Woolgoolga (Clear Place), AU	daily rain	44.7 mm (1.8 in)	21.6 mm (0.9 in)	28 years	22 of 100 (Routine)
1 May 1930	Brushgrove Post Office, AU	daily rain	40.6 mm (1.6 in)	26.6 mm (1.0 in)	25 years	21 of 100 (Routine)
1 May 1930	Parry Sound, CA	daily high min	13.3 C (55.9 F)	2.7 C (4.9 F)	35 years	21 of 100 (Routine)

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 1930

Records set or tied on this calendar date in each year from 1795 to 1930. 1930 had 263 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 1930-05-01: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 5	171
5 to 10	12
10 to 15	4
15 to 20	3
20 to 25	4
25 to 30	6
30 to 35	2