Weather Records on 20 May 1921

234 weather records were set or tied worldwide on 20 May 1921. Highest significance: Cape Jervis Lighthouse, AU.

Key Facts for 20 May 1921

On 20 May 1921, 234 weather records were set or tied at long-record stations worldwide.
39 were record highs and 5 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 4 monthly and 229 daily.
Cape Jervis Lighthouse set a daily record precipitation of 40.6 mm (1.6 in) on 20 May 1921.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 457 records.

Record Map

234 stations

234 station records on 20 May 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cape Jervis Lighthouse	Australia	Record daily precipitation	40.6 mm (1.6 in)	51 of 100 (Notable)
Kadina	Australia	Record daily precipitation	30.5 mm (1.2 in)	50 of 100 (Notable)
Minnedosa	Canada	Record daily precipitation	39.1 mm (1.5 in)	50 of 100 (Notable)
Crystal Brook	Australia	Record daily precipitation	32.3 mm (1.3 in)	44 of 100 (Notable)
Maitland	Australia	Record daily precipitation	55.1 mm (2.2 in)	44 of 100 (Notable)
Belair (State Flora Nursery)	Australia	Record daily precipitation	47.2 mm (1.9 in)	44 of 100 (Notable)
Dobikin	Australia	Record daily precipitation	43.2 mm (1.7 in)	42 of 100 (Notable)
Port Broughton	Australia	Record daily precipitation	38.1 mm (1.5 in)	41 of 100 (Notable)
Yankalilla (Woodvale)	Australia	Record daily precipitation	62.0 mm (2.4 in)	41 of 100 (Notable)
Stansbury	Australia	Record daily precipitation	33.0 mm (1.3 in)	38 of 100 (Notable)
Second Valley (Poolamacca)	Australia	Record daily precipitation	45.7 mm (1.8 in)	37 of 100 (Notable)
Sturt	Australia	Record daily precipitation	52.1 mm (2.1 in)	35 of 100 (Notable)
Bundarra Post Office	Australia	Record daily precipitation	26.4 mm (1.0 in)	35 of 100 (Notable)
Moonta	Australia	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Maitland (Weetulta)	Australia	Record daily precipitation	35.6 mm (1.4 in)	34 of 100 (Routine)
Coromandel Valley (Branden)	Australia	Record daily precipitation	58.2 mm (2.3 in)	34 of 100 (Routine)
Adelaide (Morphett Vale)	Australia	Record daily precipitation	30.5 mm (1.2 in)	34 of 100 (Routine)
Cuerindi	Australia	Record daily precipitation	26.2 mm (1.0 in)	33 of 100 (Routine)
Wallaroo	Australia	Record daily precipitation	28.2 mm (1.1 in)	31 of 100 (Routine)
Mundoora	Australia	Record daily precipitation	28.4 mm (1.1 in)	29 of 100 (Routine)
Pallal	Australia	Record daily precipitation	28.2 mm (1.1 in)	27 of 100 (Routine)
Clarendon	Australia	Record daily precipitation	30.7 mm (1.2 in)	26 of 100 (Routine)
Willunga	Australia	Record daily precipitation	25.1 mm (1.0 in)	24 of 100 (Routine)
Millie	Australia	Record daily precipitation	29.5 mm (1.2 in)	24 of 100 (Routine)
Kilmore Assumption College	Australia	Record daily precipitation	31.0 mm (1.2 in)	24 of 100 (Routine)
Kingscote	Australia	Record daily precipitation	29.2 mm (1.1 in)	22 of 100 (Routine)
Adelaide (Glen Osmond)	Australia	Record daily precipitation	39.1 mm (1.5 in)	22 of 100 (Routine)
Blackall Township	Australia	Record daily precipitation	25.7 mm (1.0 in)	21 of 100 (Routine)
Wollun	Australia	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Carroll (the Ranch)	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Paskeville	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Bute	Australia	Record daily precipitation	22.4 mm (0.9 in)	20 of 100 (Routine)
Edithburgh Post Office	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Wittenberg	Germany	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Beltana	Australia	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Tarriaro	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Port Pirie (Valencia)	Australia	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
New Angledool Telephone Office	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Edgeroi	Australia	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Willow Tree (Valais)	Australia	Record daily precipitation	16.0 mm (0.6 in)	20 of 100 (Routine)
Blackville (Welton Dale)	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Minlaton	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Georgetown Post Office	Australia	Record daily precipitation	8.4 mm (0.33 in)	20 of 100 (Routine)
Culpotaro	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Goulburn River @ Shepparton	Australia	Record daily precipitation	15.5 mm (0.6 in)	20 of 100 (Routine)
Gumbardo	Australia	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Garah (Welbon)	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Boggabri (Milchengowrie)	Australia	Record daily precipitation	12.2 mm (0.5 in)	20 of 100 (Routine)
Pentland Post Office	Australia	Record daily precipitation	9.7 mm (0.38 in)	20 of 100 (Routine)
Brewarrina Hospital	Australia	Record daily precipitation	4.3 mm (0.17 in)	20 of 100 (Routine)
Manilla Post Office	Australia	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Barkers Creek Reservoir	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Coondambo	Australia	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Curramulka	Australia	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Old Noarlunga Post Office	Australia	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Charters Towers Post Office	Australia	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Wilcannia (Reid St)	Australia	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Walgett (Dungalear)	Australia	Record daily precipitation	8.6 mm (0.34 in)	20 of 100 (Routine)
Tamworth West	Australia	Record daily precipitation	4.6 mm (0.18 in)	20 of 100 (Routine)
Bamberg	Germany	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)

Counts by Type and Timescale

234 records

Records set or tied on 20 May 1921 by type: Highest daily maximum 14, Lowest daily maximum 2, Highest daily minimum 25, Lowest daily minimum 3, Heaviest daily rainfall 190.

Records on 20 May 1921 by type
Record type	Records
Highest daily maximum	14
Lowest daily maximum	2
Highest daily minimum	25
Lowest daily minimum	3
Heaviest daily rainfall	190
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 May 1921 by timescale: all-time 1, monthly 4, daily 229.

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 41.7. Ties are not counted.

Top 20 by Significance

20 May 1921

Top 20 records on 20 May 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1921	Cape Jervis Lighthouse, AU	daily rain	40.6 mm (1.6 in)	31.7 mm (1.2 in)	24 years	51 of 100 (Notable)
20 May 1921	Kadina, AU	daily rain	30.5 mm (1.2 in)	23.4 mm (0.9 in)	34 years	50 of 100 (Notable)
20 May 1921	Minnedosa, CA	daily rain	39.1 mm (1.5 in)	26.1 mm (1.0 in)	24 years	50 of 100 (Notable)
20 May 1921	Crystal Brook, AU	daily rain	32.3 mm (1.3 in)	21.4 mm (0.8 in)	24 years	44 of 100 (Notable)
20 May 1921	Maitland, AU	daily rain	55.1 mm (2.2 in)	27.4 mm (1.1 in)	31 years	44 of 100 (Notable)
20 May 1921	Belair (State Flora Nursery), AU	daily rain	47.2 mm (1.9 in)	27.9 mm (1.1 in)	14 years	44 of 100 (Notable)
20 May 1921	Dobikin, AU	daily rain	43.2 mm (1.7 in)	41.7 mm (1.6 in)	10 years	42 of 100 (Notable)
20 May 1921	Port Broughton, AU	daily rain	38.1 mm (1.5 in)	18.3 mm (0.7 in)	31 years	41 of 100 (Notable)
20 May 1921	Yankalilla (Woodvale), AU	daily rain	62.0 mm (2.4 in)	24.9 mm (1.0 in)	31 years	41 of 100 (Notable)
20 May 1921	Stansbury, AU	daily rain	33.0 mm (1.3 in)	16.2 mm (0.6 in)	31 years	38 of 100 (Notable)
20 May 1921	Second Valley (Poolamacca), AU	daily rain	45.7 mm (1.8 in)	34.5 mm (1.4 in)	14 years	37 of 100 (Notable)
20 May 1921	Sturt, AU	monthly rain	52.1 mm (2.1 in)	8.9 mm (0.35 in)	31 years	35 of 100 (Notable)
20 May 1921	Bundarra Post Office, AU	daily rain	26.4 mm (1.0 in)	21.1 mm (0.8 in)	37 years	35 of 100 (Notable)
20 May 1921	Moonta, AU	daily rain	38.1 mm (1.5 in)	14.5 mm (0.6 in)	31 years	34 of 100 (Routine)
20 May 1921	Maitland (Weetulta), AU	daily rain	35.6 mm (1.4 in)	14.5 mm (0.6 in)	31 years	34 of 100 (Routine)
20 May 1921	Coromandel Valley (Branden), AU	monthly rain	58.2 mm (2.3 in)	11.7 mm (0.5 in)	23 years	34 of 100 (Routine)
20 May 1921	Adelaide (Morphett Vale), AU	daily rain	30.5 mm (1.2 in)	17.8 mm (0.7 in)	14 years	34 of 100 (Routine)
20 May 1921	Cuerindi, AU	daily rain	26.2 mm (1.0 in)	25.7 mm (1.0 in)	26 years	33 of 100 (Routine)
20 May 1921	Wallaroo, AU	daily rain	28.2 mm (1.1 in)	11.9 mm (0.5 in)	24 years	31 of 100 (Routine)
20 May 1921	Mundoora, AU	daily rain	28.4 mm (1.1 in)	16.0 mm (0.6 in)	24 years	29 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

1802 to 1921

Records set or tied on this calendar date in each year from 1802 to 1921. 1921 had 234 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 1921-05-20: 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 20 May 1921
Margin	Records
0 to 10	149
10 to 20	37
20 to 30	13
30 to 40	2
40 to 50	1