Weather Records on 1 May 1921

41 weather records were set or tied worldwide on 1 May 1921. Highest significance: Warren (Eenaweena), AU.

Key Facts for 1 May 1921

On 1 May 1921, 41 weather records were set or tied at long-record stations worldwide.
14 were record highs and 7 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 39 daily.
Warren (Eenaweena) set a daily record precipitation of 48.5 mm (1.9 in) on 1 May 1921.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 445 records.

Record Map

41 stations

41 station records on 1 May 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Warren (Eenaweena)	Australia	Record daily precipitation	48.5 mm (1.9 in)	50 of 100 (Notable)
Bakensrug	South Africa	Record daily precipitation	27.2 mm (1.1 in)	49 of 100 (Notable)
Crookwell Post Office	Australia	Record daily precipitation	31.0 mm (1.2 in)	47 of 100 (Notable)
Blue Hill Coop	United States	Record daily precipitation	64.3 mm (2.5 in)	35 of 100 (Notable)
Leominster	United States	Record daily precipitation	57.9 mm (2.3 in)	35 of 100 (Notable)
Hingham (1)	United States	Record daily precipitation	71.1 mm (2.8 in)	29 of 100 (Routine)
Galway	Ireland	Record high maximum temperature	22.2 C (72.0 F)	26 of 100 (Routine)
Ediacara	Australia	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Anticosti SW Point	Canada	Record high maximum temperature	12.2 C (54.0 F)	19 of 100 (Routine)
Constantine	Algeria	Record daily precipitation	16.8 mm (0.7 in)	18 of 100 (Routine)
Narrandera Post Office	Australia	Record daily precipitation	1.3 mm (0.05 in)	17 of 100 (Routine)
Jakutsk	Russia	Record low minimum temperature	-17.3 C (0.9 F)	17 of 100 (Routine)
Cathcart	South Africa	Record daily precipitation	12.7 mm (0.5 in)	17 of 100 (Routine)
Griquatown (Tnk)	South Africa	Record daily precipitation	14.2 mm (0.6 in)	17 of 100 (Routine)
Bjuraker	Sweden	Record high minimum temperature	6.5 C (43.7 F)	16 of 100 (Routine)
Jokkmokk	Sweden	Record high minimum temperature	2.6 C (36.7 F)	16 of 100 (Routine)
Mildura Post Office	Australia	Record high maximum temperature	31.1 C (88.0 F)	15 of 100 (Routine)
Vryburg (Pol)	South Africa	Record daily precipitation	3.6 mm (0.14 in)	15 of 100 (Routine)
Adelaide West Terrace	Australia	Record high maximum temperature	30.1 C (86.2 F)	13 of 100 (Routine)
Harnosand	Sweden	Record high maximum temperature	18.2 C (64.8 F)	13 of 100 (Routine)
Bungendore (Douglas)	Australia	Record daily precipitation	1.3 mm (0.05 in)	12 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record high minimum temperature	4.0 C (39.2 F)	12 of 100 (Routine)
Deniliquin (Wilkinson St)	Australia	Record high minimum temperature	17.2 C (63.0 F)	11 of 100 (Routine)
Stradbroke Post Office	Australia	Record daily precipitation	2.5 mm (0.10 in)	11 of 100 (Routine)
Irkutsk	Russia	Record high maximum temperature	23.3 C (73.9 F)	11 of 100 (Routine)
Pitea	Sweden	Record high minimum temperature	5.0 C (41.0 F)	11 of 100 (Routine)
Agassiz Cda	Canada	Record daily precipitation	20.1 mm (0.8 in)	9 of 100 (Routine)
Nieu-Bethesda (Pol)	South Africa	Record daily precipitation	3.8 mm (0.15 in)	9 of 100 (Routine)
Lady Frere (Tnk)	South Africa	Record daily precipitation	6.4 mm (0.25 in)	9 of 100 (Routine)
Jakutsk	Russia	Record daily precipitation	2.0 mm (0.08 in)	8 of 100 (Routine)
Tsomo (Pol)	South Africa	Record daily precipitation	12.7 mm (0.5 in)	8 of 100 (Routine)
Enoggera Reservoir	Australia	Record daily precipitation	12.2 mm (0.5 in)	5 of 100 (Routine)
Washington	United States	Record low maximum temperature	10.6 C (51.1 F)	5 of 100 (Routine)
Constantine	Algeria	Record low maximum temperature	9.0 C (48.2 F)	4 of 100 (Routine)
Harnosand	Sweden	Record high minimum temperature	5.0 C (41.0 F)	3 of 100 (Routine)
Philadelphia City	United States	Record low maximum temperature	11.1 C (52.0 F)	3 of 100 (Routine)
Stornoway Airport	United Kingdom	Record high maximum temperature	16.7 C (62.1 F)	2 of 100 (Routine)
Cape May 2 NW	United States	Record low maximum temperature	11.7 C (53.1 F)	2 of 100 (Routine)
Astoria	United States	Record low maximum temperature	10.0 C (50.0 F)	2 of 100 (Routine)
Ottawa Cda	Canada	Record high minimum temperature	10.6 C (51.1 F)	1 of 100 (Routine)
Harrisburg - Coop	United States	Record low maximum temperature	10.0 C (50.0 F)	1 of 100 (Routine)

Counts by Type and Timescale

41 records

Records set or tied on 1 May 1921 by type: Highest daily maximum 7, Lowest daily maximum 6, Highest daily minimum 7, Lowest daily minimum 1, Heaviest daily rainfall 20.

Records on 1 May 1921 by type
Record type	Records
Highest daily maximum	7
Lowest daily maximum	6
Highest daily minimum	7
Lowest daily minimum	1
Heaviest daily rainfall	20
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 May 1921 by timescale: all-time 0, monthly 2, daily 39.

How Much Records Were Beaten By

32 broken records

Margins by which the 32 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 46.7. Ties are not counted.

Top 20 by Significance

1 May 1921

Top 20 records on 1 May 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1921	Warren (Eenaweena), AU	daily rain	48.5 mm (1.9 in)	46.7 mm (1.8 in)	22 years	50 of 100 (Notable)
1 May 1921	Bakensrug, ZA	daily rain	27.2 mm (1.1 in)	27.2 mm (1.1 in)	30 years	49 of 100 (Notable)
1 May 1921	Crookwell Post Office, AU	daily rain	31.0 mm (1.2 in)	25.4 mm (1.0 in)	28 years	47 of 100 (Notable)
1 May 1921	Blue Hill Coop, US	daily rain	64.3 mm (2.5 in)	32.3 mm (1.3 in)	3 years	35 of 100 (Notable)
1 May 1921	Leominster, US	daily rain	57.9 mm (2.3 in)	34.8 mm (1.4 in)	3 years	35 of 100 (Notable)
1 May 1921	Hingham (1), US	daily rain	71.1 mm (2.8 in)	39.3 mm (1.5 in)	3 years	29 of 100 (Routine)
1 May 1921	Galway, IE	daily high max	22.2 C (72.0 F)	1.6 C (2.9 F)	51 years	26 of 100 (Routine)
1 May 1921	Ediacara, AU	daily rain	11.7 mm (0.5 in)	11.2 mm (0.4 in)	33 years	20 of 100 (Routine)
1 May 1921	Anticosti SW Point, CA	daily high max	12.2 C (54.0 F)	3.3 C (5.9 F)	21 years	19 of 100 (Routine)
1 May 1921	Constantine, DZ	daily rain	16.8 mm (0.7 in)	2.8 mm (0.11 in)	34 years	18 of 100 (Routine)
1 May 1921	Narrandera Post Office, AU	daily rain	1.3 mm (0.05 in)	1.3 mm (0.05 in)	40 years	17 of 100 (Routine)
1 May 1921	Jakutsk, RU	monthly low min	-17.3 C (0.9 F)	0.3 C (0.5 F)	15 years	17 of 100 (Routine)
1 May 1921	Cathcart, ZA	daily rain	12.7 mm (0.5 in)	5.1 mm (0.20 in)	22 years	17 of 100 (Routine)
1 May 1921	Griquatown (Tnk), ZA	daily rain	14.2 mm (0.6 in)	8.9 mm (0.35 in)	8 years	17 of 100 (Routine)
1 May 1921	Bjuraker, SE	daily high min	6.5 C (43.7 F)	3.0 C (5.4 F)	16 years	16 of 100 (Routine)
1 May 1921	Jokkmokk, SE	daily high min	2.6 C (36.7 F)	0.6 C (1.1 F)	38 years	16 of 100 (Routine)
1 May 1921	Mildura Post Office, AU	daily high max	31.1 C (88.0 F)	2.2 C (4.0 F)	24 years	15 of 100 (Routine)
1 May 1921	Vryburg (Pol), ZA	daily rain	3.6 mm (0.14 in)	2.3 mm (0.09 in)	33 years	15 of 100 (Routine)
1 May 1921	Adelaide West Terrace, AU	daily high max	30.1 C (86.2 F)	0.5 C (0.9 F)	32 years	13 of 100 (Routine)
1 May 1921	Harnosand, SE	daily high max	18.2 C (64.8 F)	0.2 C (0.4 F)	30 years	13 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 1921

Records set or tied on this calendar date in each year from 1795 to 1921. 1921 had 41 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 1921-05-01: 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).

Histogram of margins by which records were beaten on 1 May 1921
Margin	Records
0 to 10	25
10 to 20	1
20 to 30	2
30 to 40	3
40 to 50	1