Weather Records on 21 May 1921

158 weather records were set or tied worldwide on 21 May 1921. Highest significance: Port Albert, AU.

Key Facts for 21 May 1921

On 21 May 1921, 158 weather records were set or tied at long-record stations worldwide.
60 were record highs and 1 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 155 daily.
Port Albert set a daily record precipitation of 28.4 mm (1.1 in) on 21 May 1921.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

158 stations

158 station records on 21 May 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Port Albert	Australia	Record daily precipitation	28.4 mm (1.1 in)	44 of 100 (Notable)
Hillgrove (Hillview)	Australia	Record daily precipitation	44.5 mm (1.8 in)	37 of 100 (Notable)
Ottawa	Canada	Record high maximum temperature	33.9 C (93.0 F)	30 of 100 (Routine)
Duaringa Post Office	Australia	Record daily precipitation	42.4 mm (1.7 in)	25 of 100 (Routine)
Tampa	United States	Record daily precipitation	56.1 mm (2.2 in)	24 of 100 (Routine)
Lincoln UNIV Pwr Plt	United States	Record high minimum temperature	21.1 C (70.0 F)	23 of 100 (Routine)
Portland	United States	Record high maximum temperature	33.9 C (93.0 F)	22 of 100 (Routine)
Deepwater Post Office	Australia	Record daily precipitation	27.7 mm (1.1 in)	21 of 100 (Routine)
Ottawa Cda	Canada	Record high maximum temperature	35.0 C (95.0 F)	21 of 100 (Routine)
Karesuando	Sweden	Record daily precipitation	13.6 mm (0.5 in)	20 of 100 (Routine)
San Diego Wbo	United States	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Herberton White St	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Woodside	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Ft Bidwell	United States	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Springsure Comet St	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Rosedale	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Cape Willoughby	Australia	Record daily precipitation	12.4 mm (0.5 in)	20 of 100 (Routine)
Mudgee (George Street)	Australia	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Anna Creek	Australia	Record daily precipitation	5.1 mm (0.20 in)	20 of 100 (Routine)
Maffra Shire Hall	Australia	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Carrajung Post Office	Australia	Record daily precipitation	31.0 mm (1.2 in)	20 of 100 (Routine)
Milwaukee Wb City	United States	Record high minimum temperature	20.0 C (68.0 F)	20 of 100 (Routine)
Concordia ASOS	United States	Record high minimum temperature	20.0 C (68.0 F)	20 of 100 (Routine)
Sale	Australia	Record daily precipitation	17.8 mm (0.7 in)	19 of 100 (Routine)
Santa Fe	United States	Record high minimum temperature	11.7 C (53.1 F)	19 of 100 (Routine)
Madison Wb City	United States	Record high minimum temperature	19.4 C (66.9 F)	19 of 100 (Routine)
Cardwell Marine Pde	Australia	Record daily precipitation	49.8 mm (2.0 in)	18 of 100 (Routine)
Trunkey Creek (Trunkey (Black	Australia	Record daily precipitation	16.3 mm (0.6 in)	18 of 100 (Routine)
Taralga Post Office	Australia	Record daily precipitation	10.7 mm (0.4 in)	18 of 100 (Routine)
Wallan (Walnarring)	Australia	Record daily precipitation	20.6 mm (0.8 in)	18 of 100 (Routine)
Owen Sound	Canada	Record high maximum temperature	30.6 C (87.1 F)	18 of 100 (Routine)
Blue Hill Coop	United States	Record high maximum temperature	33.3 C (91.9 F)	18 of 100 (Routine)
Mackay Post Office	Australia	Record high maximum temperature	28.9 C (84.0 F)	17 of 100 (Routine)
Bannockburn	Australia	Record daily precipitation	36.6 mm (1.4 in)	17 of 100 (Routine)
Tenterden	Australia	Record daily precipitation	33.3 mm (1.3 in)	17 of 100 (Routine)
Walcha Post Office	Australia	Record daily precipitation	22.6 mm (0.9 in)	17 of 100 (Routine)
Swan Hill (Murray Downs)	Australia	Record daily precipitation	11.2 mm (0.4 in)	17 of 100 (Routine)
Sale Mercury Office	Australia	Record daily precipitation	17.8 mm (0.7 in)	17 of 100 (Routine)
Milwaukee Wb City	United States	Record high maximum temperature	31.7 C (89.1 F)	17 of 100 (Routine)
Huron Rgnl AP	United States	Record high minimum temperature	16.7 C (62.1 F)	17 of 100 (Routine)
Emerald Post Office	Australia	Record daily precipitation	23.6 mm (0.9 in)	16 of 100 (Routine)
Gladstone Post Office	Australia	Record daily precipitation	19.8 mm (0.8 in)	16 of 100 (Routine)
Goondiwindi Post Office	Australia	Record daily precipitation	26.2 mm (1.0 in)	16 of 100 (Routine)
Barraba (Mount Lindsay)	Australia	Record daily precipitation	33.5 mm (1.3 in)	16 of 100 (Routine)
Maitland West	Australia	Record daily precipitation	13.5 mm (0.5 in)	16 of 100 (Routine)
Bigga (Woolbrook)	Australia	Record daily precipitation	17.8 mm (0.7 in)	16 of 100 (Routine)
Mendooran Post Office	Australia	Record daily precipitation	16.0 mm (0.6 in)	16 of 100 (Routine)
Bungendore Post Office	Australia	Record daily precipitation	7.1 mm (0.28 in)	16 of 100 (Routine)
La Crosse Wb City	United States	Record high maximum temperature	30.6 C (87.1 F)	16 of 100 (Routine)
Madison Wb City	United States	Record high maximum temperature	30.0 C (86.0 F)	16 of 100 (Routine)
Green Bay	United States	Record high minimum temperature	18.9 C (66.0 F)	16 of 100 (Routine)
Dubuque River	United States	Record high minimum temperature	20.0 C (68.0 F)	16 of 100 (Routine)
Yardea	Australia	Record daily precipitation	4.1 mm (0.16 in)	15 of 100 (Routine)
Blackville Post Office	Australia	Record daily precipitation	19.8 mm (0.8 in)	15 of 100 (Routine)
Burrundulla	Australia	Record daily precipitation	21.8 mm (0.9 in)	15 of 100 (Routine)
Queanbeyan 2	Australia	Record daily precipitation	10.7 mm (0.4 in)	15 of 100 (Routine)
Melbourne Regional Office	Australia	Record daily precipitation	8.4 mm (0.33 in)	15 of 100 (Routine)
Little River (Mount Rothwell)	Australia	Record daily precipitation	8.1 mm (0.32 in)	15 of 100 (Routine)
Bancroft	Canada	Record high minimum temperature	19.4 C (66.9 F)	15 of 100 (Routine)
Franklin	United States	Record high minimum temperature	17.2 C (63.0 F)	15 of 100 (Routine)

Counts by Type and Timescale

158 records

Records set or tied on 21 May 1921 by type: Highest daily maximum 31, Highest daily minimum 29, Lowest daily minimum 1, Heaviest daily rainfall 97.

Records on 21 May 1921 by type
Record type	Records
Highest daily maximum	31
Lowest daily maximum	0
Highest daily minimum	29
Lowest daily minimum	1
Heaviest daily rainfall	97
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 May 1921 by timescale: all-time 0, monthly 3, daily 155.

How Much Records Were Beaten By

137 broken records

Margins by which the 137 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 28.2. Ties are not counted.

Top 20 by Significance

21 May 1921

Top 20 records on 21 May 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1921	Port Albert, AU	daily rain	28.4 mm (1.1 in)	19.0 mm (0.7 in)	26 years	44 of 100 (Notable)
21 May 1921	Hillgrove (Hillview), AU	daily rain	44.5 mm (1.8 in)	28.2 mm (1.1 in)	7 years	37 of 100 (Notable)
21 May 1921	Ottawa, CA	monthly high max	33.9 C (93.0 F)	0.6 C (1.1 F)	46 years	30 of 100 (Routine)
21 May 1921	Duaringa Post Office, AU	daily rain	42.4 mm (1.7 in)	23.3 mm (0.9 in)	24 years	25 of 100 (Routine)
21 May 1921	Tampa, US	daily rain	56.1 mm (2.2 in)	27.1 mm (1.1 in)	8 years	24 of 100 (Routine)
21 May 1921	Lincoln UNIV Pwr Plt, US	daily high min	21.1 C (70.0 F)	4.4 C (7.9 F)	37 years	23 of 100 (Routine)
21 May 1921	Portland, US	daily high max	33.9 C (93.0 F)	5.6 C (10.1 F)	27 years	22 of 100 (Routine)
21 May 1921	Deepwater Post Office, AU	daily rain	27.7 mm (1.1 in)	17.8 mm (0.7 in)	18 years	21 of 100 (Routine)
21 May 1921	Ottawa Cda, CA	monthly high max	35.0 C (95.0 F)	0.6 C (1.1 F)	25 years	21 of 100 (Routine)
21 May 1921	Karesuando, SE	daily rain	13.6 mm (0.5 in)	10.6 mm (0.4 in)	35 years	20 of 100 (Routine)
21 May 1921	San Diego Wbo, US	daily rain	14.7 mm (0.6 in)	7.1 mm (0.28 in)	29 years	20 of 100 (Routine)
21 May 1921	Herberton White St, AU	daily rain	20.3 mm (0.8 in)	14.7 mm (0.6 in)	16 years	20 of 100 (Routine)
21 May 1921	Woodside, AU	daily rain	21.6 mm (0.9 in)	13.7 mm (0.5 in)	20 years	20 of 100 (Routine)
21 May 1921	Ft Bidwell, US	daily rain	17.0 mm (0.7 in)	6.8 mm (0.27 in)	42 years	20 of 100 (Routine)
21 May 1921	Springsure Comet St, AU	daily rain	23.6 mm (0.9 in)	17.5 mm (0.7 in)	20 years	20 of 100 (Routine)
21 May 1921	Rosedale, AU	daily rain	23.6 mm (0.9 in)	12.4 mm (0.5 in)	21 years	20 of 100 (Routine)
21 May 1921	Cape Willoughby, AU	daily rain	12.4 mm (0.5 in)	6.3 mm (0.25 in)	27 years	20 of 100 (Routine)
21 May 1921	Mudgee (George Street), AU	daily rain	23.1 mm (0.9 in)	5.1 mm (0.20 in)	44 years	20 of 100 (Routine)
21 May 1921	Anna Creek, AU	daily rain	5.1 mm (0.20 in)	5.1 mm (0.20 in)	36 years	20 of 100 (Routine)
21 May 1921	Maffra Shire Hall, AU	daily rain	21.1 mm (0.8 in)	10.9 mm (0.4 in)	27 years	20 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

1793 to 1921

Records set or tied on this calendar date in each year from 1793 to 1921. 1921 had 158 records.

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

Records on 05-21 in each year
Year	Records
1793	1
1795	1
1811	1
1837	2
1842	1
1847	2
1854	1
1857	1
1858	1
1865	1
1866	1
1870	2
1875	1
1876	1
1880	2
1882	1
1885	1
1886	2
1887	3
1889	5
1890	3
1891	6
1892	1
1893	1
1894	4
1895	4
1896	5
1897	2
1898	1
1899	5
1900	1
1901	3
1902	4
1903	26
1904	8
1905	7
1906	12
1907	36
1908	13
1909	13
1910	14
1911	87
1912	24
1913	13
1914	26
1915	24
1916	13
1917	76
1918	51
1919	170
1920	39
1921	158
1922	39
1923	125
1924	148
1925	250
1926	221
1927	207
1928	173
1929	247
1930	133
1931	488
1932	343
1933	290
1934	590
1935	190
1936	328
1937	227
1938	348
1939	355
1940	456
1941	525
1942	482
1943	463
1944	310
1945	515
1946	324
1947	485
1948	312
1949	593
1950	403
1951	271
1952	385
1953	501
1954	961
1955	507
1956	409
1957	709
1958	511
1959	684
1960	615
1961	306
1962	553
1963	598
1964	788
1965	238
1966	296
1967	1,022
1968	549
1969	832
1970	449
1971	536
1972	557
1973	493
1974	847
1975	1,160
1976	393
1977	756
1978	575
1979	787
1980	857
1981	1,550
1982	599
1983	1,106
1984	950
1985	610
1986	908
1987	1,242
1988	819
1989	671
1990	947
1991	1,065
1992	1,143
1993	1,197
1994	656
1995	749
1996	1,461
1997	953
1998	1,200
1999	544
2000	897
2001	1,187
2002	2,048
2003	807
2004	898
2005	1,020
2006	810
2007	894
2008	740
2009	1,315
2010	962
2011	959
2012	848
2013	884
2014	522
2015	956
2016	567
2017	780
2018	525
2019	1,668
2020	707
2021	1,131
2022	1,512
2023	794
2024	751
2025	776
2026	356

Download the Data

Data for records on 1921-05-21: 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 2026-10-15 (15 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	92
5 to 10	27
10 to 15	11
15 to 20	4
20 to 25	1
25 to 30	2