Weather Records on 12 May 1921

64 weather records were set or tied worldwide on 12 May 1921. Highest significance: Wollong, AU.

Key Facts for 12 May 1921

On 12 May 1921, 64 weather records were set or tied at long-record stations worldwide.
7 were record highs and 6 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 62 daily.
Wollong set a daily record precipitation of 80.5 mm (3.2 in) on 12 May 1921.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 455 records.

Record Map

64 stations

64 station records on 12 May 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Wollong	Australia	Record daily precipitation	80.5 mm (3.2 in)	50 of 100 (Notable)
Wyong (Wyong Golf Club)	Australia	Record daily precipitation	99.8 mm (3.9 in)	45 of 100 (Notable)
Morpeth Post Office	Australia	Record daily precipitation	64.8 mm (2.6 in)	43 of 100 (Notable)
Singleton Post Office	Australia	Record daily precipitation	51.1 mm (2.0 in)	43 of 100 (Notable)
Baltimore Customs House	United States	Record daily precipitation	52.3 mm (2.1 in)	39 of 100 (Notable)
Gosford (Gertrude Place)	Australia	Record daily precipitation	111.3 mm (4.4 in)	37 of 100 (Notable)
Katoomba (Murri St)	Australia	Record daily precipitation	62.5 mm (2.5 in)	34 of 100 (Routine)
Washington	United States	Record daily precipitation	51.3 mm (2.0 in)	30 of 100 (Routine)
Branxton Post Office	Australia	Record daily precipitation	91.4 mm (3.6 in)	28 of 100 (Routine)
Harrisburg - Coop	United States	Record daily precipitation	31.2 mm (1.2 in)	25 of 100 (Routine)
Reading Wb City	United States	Record daily precipitation	26.2 mm (1.0 in)	25 of 100 (Routine)
Mount Victoria (Mt Victoria (S	Australia	Record daily precipitation	32.3 mm (1.3 in)	22 of 100 (Routine)
Camden (Brownlow Hill)	Australia	Record daily precipitation	26.4 mm (1.0 in)	22 of 100 (Routine)
Prince Albert	Canada	Record daily snowfall	10.2 cm (4.0 in)	22 of 100 (Routine)
Cobbity (Roseneath)	Australia	Record daily precipitation	28.4 mm (1.1 in)	21 of 100 (Routine)
Emu Plains	Australia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Lithgow (Birdwood St)	Australia	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Camden Bowling Club	Australia	Record daily precipitation	33.0 mm (1.3 in)	20 of 100 (Routine)
Jokkmokk	Sweden	Record high minimum temperature	4.5 C (40.1 F)	20 of 100 (Routine)
Broke (Harrowby)	Australia	Record daily precipitation	21.3 mm (0.8 in)	19 of 100 (Routine)
Tomago	Australia	Record daily precipitation	30.0 mm (1.2 in)	19 of 100 (Routine)
Cataract River	Australia	Record daily precipitation	37.6 mm (1.5 in)	19 of 100 (Routine)
Shenkursk	Russia	Record daily precipitation	11.2 mm (0.4 in)	19 of 100 (Routine)
Newark Liberty Intl AP	United States	Record daily precipitation	29.0 mm (1.1 in)	19 of 100 (Routine)
Maitland West	Australia	Record daily precipitation	52.1 mm (2.1 in)	18 of 100 (Routine)
Jerrys Plains Post Office	Australia	Record daily precipitation	23.4 mm (0.9 in)	18 of 100 (Routine)
Gloucester Post Office	Australia	Record daily precipitation	25.4 mm (1.0 in)	17 of 100 (Routine)
Hornsby Junction (Thornleigh)	Australia	Record daily precipitation	45.7 mm (1.8 in)	17 of 100 (Routine)
Sveg	Sweden	Record high minimum temperature	6.0 C (42.8 F)	17 of 100 (Routine)
Branxton (Dalwood Vineyard)	Australia	Record daily precipitation	84.3 mm (3.3 in)	16 of 100 (Routine)
Tahlee (Carrington (Church St)	Australia	Record daily precipitation	40.6 mm (1.6 in)	16 of 100 (Routine)
Menangle Jmai	Australia	Record daily precipitation	18.3 mm (0.7 in)	16 of 100 (Routine)
Medicine Hat A	Canada	Record low maximum temperature	6.7 C (44.1 F)	16 of 100 (Routine)
Lithgow (Cooerwull)	Australia	Record daily precipitation	14.7 mm (0.6 in)	15 of 100 (Routine)
Campbelltown 1	Australia	Record daily precipitation	25.4 mm (1.0 in)	15 of 100 (Routine)
Moose Factory	Canada	Record high minimum temperature	8.9 C (48.0 F)	15 of 100 (Routine)
Harpers Ferry River	United States	Record daily precipitation	30.5 mm (1.2 in)	15 of 100 (Routine)
Penshurst (Gresford)	Australia	Record daily precipitation	18.3 mm (0.7 in)	14 of 100 (Routine)
Methven	Australia	Record daily precipitation	15.2 mm (0.6 in)	14 of 100 (Routine)
Lake Cochituate	United States	Record low minimum temperature	-2.8 C (27.0 F)	14 of 100 (Routine)
Bakensrug	South Africa	Record daily precipitation	0.8 mm (0.03 in)	13 of 100 (Routine)
Needles	United States	Record high maximum temperature	41.1 C (106.0 F)	13 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	-3.3 C (26.1 F)	13 of 100 (Routine)
Muswellbrook (Lower Hill St)	Australia	Record daily precipitation	10.2 mm (0.4 in)	12 of 100 (Routine)
Springwood Bowling Club	Australia	Record daily precipitation	19.6 mm (0.8 in)	12 of 100 (Routine)
Milton Post Office	Australia	Record daily precipitation	25.4 mm (1.0 in)	11 of 100 (Routine)
Battleford	Canada	Record daily snowfall	2.5 cm (1.0 in)	11 of 100 (Routine)
Haliburton A	Canada	Record daily precipitation	12.7 mm (0.5 in)	11 of 100 (Routine)
Bogoroditskoye-Fenino	Russia	Record high maximum temperature	28.5 C (83.3 F)	11 of 100 (Routine)
Picton Council Depot	Australia	Record daily precipitation	23.1 mm (0.9 in)	10 of 100 (Routine)
Calgary Int'l A	Canada	Record low maximum temperature	7.8 C (46.0 F)	10 of 100 (Routine)
Murphy 4ESE	United States	Record daily precipitation	15.7 mm (0.6 in)	9 of 100 (Routine)
Richmond - Uws Hawkesbury	Australia	Record daily precipitation	10.2 mm (0.4 in)	8 of 100 (Routine)
Medicine Hat A	Canada	Record daily precipitation	5.8 mm (0.23 in)	8 of 100 (Routine)
Philadelphia City	United States	Record daily precipitation	20.1 mm (0.8 in)	8 of 100 (Routine)
Cairns Post Office	Australia	Record daily precipitation	26.9 mm (1.1 in)	6 of 100 (Routine)
Barkerville	Canada	Record daily snowfall	2.8 cm (1.1 in)	6 of 100 (Routine)
Tabulam Post Office	Australia	Record daily precipitation	12.7 mm (0.5 in)	5 of 100 (Routine)
Stroud Post Office	Australia	Record daily precipitation	17.8 mm (0.7 in)	5 of 100 (Routine)
Borroloola	Australia	Record daily precipitation	1.3 mm (0.05 in)	3 of 100 (Routine)

Counts by Type and Timescale

64 records

Records set or tied on 12 May 1921 by type: Highest daily maximum 3, Lowest daily maximum 4, Highest daily minimum 4, Lowest daily minimum 2, Heaviest daily rainfall 48, Heaviest daily snowfall 3.

Records on 12 May 1921 by type
Record type	Records
Highest daily maximum	3
Lowest daily maximum	4
Highest daily minimum	4
Lowest daily minimum	2
Heaviest daily rainfall	48
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 12 May 1921 by timescale: all-time 0, monthly 2, daily 62.

How Much Records Were Beaten By

59 broken records

Margins by which the 59 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 91.7. Ties are not counted.

Top 20 by Significance

12 May 1921

Top 20 records on 12 May 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1921	Wollong, AU	daily rain	80.5 mm (3.2 in)	76.7 mm (3.0 in)	24 years	50 of 100 (Notable)
12 May 1921	Wyong (Wyong Golf Club), AU	daily rain	99.8 mm (3.9 in)	91.7 mm (3.6 in)	8 years	45 of 100 (Notable)
12 May 1921	Morpeth Post Office, AU	daily rain	64.8 mm (2.6 in)	57.9 mm (2.3 in)	8 years	43 of 100 (Notable)
12 May 1921	Singleton Post Office, AU	daily rain	51.1 mm (2.0 in)	43.7 mm (1.7 in)	15 years	43 of 100 (Notable)
12 May 1921	Baltimore Customs House, US	daily rain	52.3 mm (2.1 in)	30.5 mm (1.2 in)	10 years	39 of 100 (Notable)
12 May 1921	Gosford (Gertrude Place), AU	daily rain	111.3 mm (4.4 in)	60.5 mm (2.4 in)	41 years	37 of 100 (Notable)
12 May 1921	Katoomba (Murri St), AU	daily rain	62.5 mm (2.5 in)	52.8 mm (2.1 in)	10 years	34 of 100 (Routine)
12 May 1921	Washington, US	daily rain	51.3 mm (2.0 in)	22.1 mm (0.9 in)	8 years	30 of 100 (Routine)
12 May 1921	Branxton Post Office, AU	monthly rain	91.4 mm (3.6 in)	8.8 mm (0.35 in)	31 years	28 of 100 (Routine)
12 May 1921	Harrisburg - Coop, US	daily rain	31.2 mm (1.2 in)	16.2 mm (0.6 in)	23 years	25 of 100 (Routine)
12 May 1921	Reading Wb City, US	daily rain	26.2 mm (1.0 in)	10.5 mm (0.4 in)	38 years	25 of 100 (Routine)
12 May 1921	Mount Victoria (Mt Victoria (S, AU	daily rain	32.3 mm (1.3 in)	9.4 mm (0.37 in)	41 years	22 of 100 (Routine)
12 May 1921	Camden (Brownlow Hill), AU	daily rain	26.4 mm (1.0 in)	21.1 mm (0.8 in)	16 years	22 of 100 (Routine)
12 May 1921	Prince Albert, CA	daily snowfall	10.2 cm (4.0 in)	7.7 cm (3.0 in)	14 years	22 of 100 (Routine)
12 May 1921	Cobbity (Roseneath), AU	daily rain	28.4 mm (1.1 in)	20.8 mm (0.8 in)	16 years	21 of 100 (Routine)
12 May 1921	Emu Plains, AU	daily rain	15.7 mm (0.6 in)	10.6 mm (0.4 in)	37 years	20 of 100 (Routine)
12 May 1921	Lithgow (Birdwood St), AU	daily rain	23.9 mm (0.9 in)	14.0 mm (0.6 in)	24 years	20 of 100 (Routine)
12 May 1921	Camden Bowling Club, AU	daily rain	33.0 mm (1.3 in)	12.7 mm (0.5 in)	36 years	20 of 100 (Routine)
12 May 1921	Jokkmokk, SE	daily high min	4.5 C (40.1 F)	2.0 C (3.6 F)	37 years	20 of 100 (Routine)
12 May 1921	Broke (Harrowby), AU	daily rain	21.3 mm (0.8 in)	16.0 mm (0.6 in)	24 years	19 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

1814 to 1921

Records set or tied on this calendar date in each year from 1814 to 1921. 1921 had 64 records.

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

Records on 05-12 in each year
Year	Records
1814	2
1823	1
1825	1
1827	1
1834	1
1837	1
1838	1
1845	1
1847	1
1848	1
1849	2
1851	1
1855	2
1860	2
1862	2
1863	1
1867	1
1868	1
1872	2
1874	1
1877	1
1878	1
1879	1
1881	4
1882	5
1884	3
1885	2
1886	3
1887	1
1888	1
1889	1
1890	1
1891	4
1894	1
1895	1
1896	1
1897	7
1898	3
1900	3
1901	6
1902	5
1903	7
1904	11
1905	10
1906	20
1907	53
1908	12
1909	4
1910	9
1911	37
1912	46
1913	6
1914	36
1915	50
1916	42
1917	54
1918	113
1919	42
1920	19
1921	64
1922	43
1923	109
1924	245
1925	275
1926	121
1927	167
1928	192
1929	172
1930	500
1931	350
1932	199
1933	476
1934	293
1935	404
1936	329
1937	214
1938	394
1939	233
1940	440
1941	568
1942	418
1943	803
1944	368
1945	389
1946	653
1947	286
1948	390
1949	414
1950	283
1951	427
1952	711
1953	891
1954	305
1955	265
1956	1,568
1957	454
1958	714
1959	740
1960	1,583
1961	381
1962	713
1963	777
1964	401
1965	196
1966	909
1967	810
1968	890
1969	506
1970	698
1971	668
1972	641
1973	393
1974	702
1975	418
1976	541
1977	855
1978	802
1979	763
1980	684
1981	855
1982	763
1983	1,281
1984	887
1985	1,199
1986	473
1987	1,295
1988	619
1989	856
1990	617
1991	1,177
1992	1,022
1993	1,208
1994	738
1995	1,190
1996	1,420
1997	921
1998	1,576
1999	881
2000	1,486
2001	1,015
2002	1,027
2003	861
2004	1,054
2005	1,369
2006	797
2007	630
2008	858
2009	687
2010	1,250
2011	1,119
2012	660
2013	689
2014	949
2015	958
2016	421
2017	529
2018	819
2019	784
2020	1,338
2021	712
2022	1,930
2023	429
2024	447
2025	940
2026	1,110

Download the Data

Data for records on 1921-05-12: 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 20	45
20 to 40	7
40 to 60	3
60 to 80	3
80 to 100	1