Weather Records on 21 August 1920

59 weather records were set or tied worldwide on 21 August 1920. Highest significance: Hoorn, NL.

Key Facts for 21 August 1920

On 21 August 1920, 59 weather records were set or tied at long-record stations worldwide.
7 were record highs and 24 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 55 daily.
Hoorn set a daily record precipitation of 33.1 mm (1.3 in) on 21 August 1920.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 452 records.

Record Map

59 stations

59 station records on 21 August 1920 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1920: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hoorn	Netherlands	Record daily precipitation	33.1 mm (1.3 in)	49 of 100 (Notable)
Vineland	United States	Record daily precipitation	41.7 mm (1.6 in)	36 of 100 (Notable)
Jena Sternwarte	Germany	Record low minimum temperature	4.6 C (40.3 F)	35 of 100 (Notable)
Gravenhurst	Canada	Record daily precipitation	31.8 mm (1.3 in)	28 of 100 (Routine)
Gavle	Sweden	Record daily precipitation	29.6 mm (1.2 in)	28 of 100 (Routine)
Tunis	Tunisia	Record high maximum temperature	43.0 C (109.4 F)	26 of 100 (Routine)
Bamberg	Germany	Record low minimum temperature	3.2 C (37.8 F)	23 of 100 (Routine)
Uccle	Belgium	Record low maximum temperature	14.4 C (57.9 F)	22 of 100 (Routine)
Koffiefontein (Pol)	South Africa	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Kenhardt (Pol)	South Africa	Record daily precipitation	8.1 mm (0.32 in)	20 of 100 (Routine)
Hermannsburg	Australia	Record daily precipitation	3.6 mm (0.14 in)	20 of 100 (Routine)
Svenska Hogarna	Sweden	Record daily precipitation	21.3 mm (0.8 in)	19 of 100 (Routine)
Charlotte Waters	Australia	Record daily precipitation	1.0 mm (0.04 in)	18 of 100 (Routine)
Nurnberg	Germany	Record low minimum temperature	6.3 C (43.3 F)	18 of 100 (Routine)
Aliwal North	South Africa	Record daily precipitation	9.7 mm (0.38 in)	18 of 100 (Routine)
Lady Grey (Pol)	South Africa	Record daily precipitation	6.6 mm (0.26 in)	18 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record low minimum temperature	4.4 C (39.9 F)	18 of 100 (Routine)
Alice Springs Post Office	Australia	Record daily precipitation	0.5 mm (0.02 in)	17 of 100 (Routine)
Minnedosa	Canada	Record low minimum temperature	-2.2 C (28.0 F)	17 of 100 (Routine)
Bremen-Seefahrtschule	Germany	Record low maximum temperature	13.0 C (55.4 F)	17 of 100 (Routine)
Heinersreuth-Vollhof	Germany	Record low minimum temperature	4.7 C (40.5 F)	17 of 100 (Routine)
Green Bay	United States	Record low maximum temperature	18.9 C (66.0 F)	16 of 100 (Routine)
Gospic	Croatia	Record daily precipitation	10.6 mm (0.4 in)	15 of 100 (Routine)
Newlands	South Africa	Record daily precipitation	31.8 mm (1.3 in)	15 of 100 (Routine)
Sfax El-Maou	Tunisia	Record high maximum temperature	38.0 C (100.4 F)	15 of 100 (Routine)
Tempe Downs	Australia	Record daily precipitation	1.5 mm (0.06 in)	14 of 100 (Routine)
Haddon	Australia	Record daily precipitation	10.2 mm (0.4 in)	14 of 100 (Routine)
Coldwater	Canada	Record daily precipitation	30.0 mm (1.2 in)	14 of 100 (Routine)
Wiarton	Canada	Record daily precipitation	31.0 mm (1.2 in)	14 of 100 (Routine)
Britstown (Pol)	South Africa	Record daily precipitation	2.5 mm (0.10 in)	14 of 100 (Routine)
Beatrice	Canada	Record daily precipitation	38.1 mm (1.5 in)	13 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record low maximum temperature	13.9 C (57.0 F)	13 of 100 (Routine)
Parnu	Estonia	Record high minimum temperature	16.0 C (60.8 F)	13 of 100 (Routine)
Plauen	Germany	Record low minimum temperature	5.6 C (42.1 F)	13 of 100 (Routine)
Richmond C/K (Tnk)	South Africa	Record daily precipitation	4.6 mm (0.18 in)	13 of 100 (Routine)
Ellesmere	South Africa	Record daily precipitation	6.1 mm (0.24 in)	13 of 100 (Routine)
Kiev	Ukraine	Record high minimum temperature	19.0 C (66.2 F)	13 of 100 (Routine)
Peterborough	Canada	Record daily precipitation	17.8 mm (0.7 in)	12 of 100 (Routine)
Arnsberg	Germany	Record low maximum temperature	13.7 C (56.7 F)	12 of 100 (Routine)
Perm	Russia	Record daily precipitation	14.8 mm (0.6 in)	12 of 100 (Routine)
Brinkworth (Anama Park)	Australia	Record daily precipitation	22.1 mm (0.9 in)	11 of 100 (Routine)
Altastenberg	Germany	Record low maximum temperature	7.7 C (45.9 F)	11 of 100 (Routine)
St Albans	Canada	Record low minimum temperature	0.6 C (33.1 F)	10 of 100 (Routine)
Berlin-Dahlem	Germany	Record low minimum temperature	6.7 C (44.1 F)	10 of 100 (Routine)
Baku	Azerbaijan	Record daily precipitation	2.0 mm (0.08 in)	9 of 100 (Routine)
Nordby (Fano)	Denmark	Record low maximum temperature	14.0 C (57.2 F)	9 of 100 (Routine)
Karlsruhe	Germany	Record low minimum temperature	8.3 C (46.9 F)	9 of 100 (Routine)
Orskar_A	Sweden	Record daily precipitation	15.2 mm (0.6 in)	9 of 100 (Routine)
Altastenberg	Germany	Record low minimum temperature	4.1 C (39.4 F)	7 of 100 (Routine)
Clausthal-Zellerfeld	Germany	Record low minimum temperature	5.2 C (41.4 F)	7 of 100 (Routine)
Sveg	Sweden	Record low maximum temperature	11.5 C (52.7 F)	7 of 100 (Routine)
Alma	United States	Record daily precipitation	21.8 mm (0.9 in)	7 of 100 (Routine)
Tartu	Estonia	Record high minimum temperature	16.0 C (60.8 F)	6 of 100 (Routine)
Freiburg	Germany	Record low minimum temperature	6.7 C (44.1 F)	5 of 100 (Routine)
Wrixum/Fohr	Germany	Record low maximum temperature	13.2 C (55.8 F)	5 of 100 (Routine)
Clausthal-Zellerfeld	Germany	Record low maximum temperature	9.6 C (49.3 F)	4 of 100 (Routine)
Qu'appelle	Canada	Record low minimum temperature	-1.1 C (30.0 F)	3 of 100 (Routine)
Banff	Canada	Record high maximum temperature	27.8 C (82.0 F)	2 of 100 (Routine)
Constantine	Algeria	Record high minimum temperature	23.0 C (73.4 F)	1 of 100 (Routine)

Counts by Type and Timescale

59 records

Records set or tied on 21 August 1920 by type: Highest daily maximum 3, Lowest daily maximum 10, Highest daily minimum 4, Lowest daily minimum 14, Heaviest daily rainfall 28.

Records on 21 August 1920 by type
Record type	Records
Highest daily maximum	3
Lowest daily maximum	10
Highest daily minimum	4
Lowest daily minimum	14
Heaviest daily rainfall	28
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1920 by timescale: all-time 0, monthly 4, daily 55.

How Much Records Were Beaten By

55 broken records

Margins by which the 55 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 31.5. Ties are not counted.

Top 20 by Significance

21 August 1920

Top 20 records on 21 August 1920 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1920	Hoorn, NL	daily rain	33.1 mm (1.3 in)	21.1 mm (0.8 in)	28 years	49 of 100 (Notable)
21 August 1920	Vineland, US	daily rain	41.7 mm (1.6 in)	31.5 mm (1.2 in)	41 years	36 of 100 (Notable)
21 August 1920	Jena Sternwarte, DE	daily low min	4.6 C (40.3 F)	1.7 C (3.1 F)	70 years	35 of 100 (Notable)
21 August 1920	Gravenhurst, CA	daily rain	31.8 mm (1.3 in)	10.7 mm (0.4 in)	45 years	28 of 100 (Routine)
21 August 1920	Gavle, SE	daily rain	29.6 mm (1.2 in)	3.5 mm (0.14 in)	60 years	28 of 100 (Routine)
21 August 1920	Tunis, TN	daily high max	43.0 C (109.4 F)	5.0 C (9.0 F)	31 years	26 of 100 (Routine)
21 August 1920	Bamberg, DE	monthly low min	3.2 C (37.8 F)	0.6 C (1.1 F)	23 years	23 of 100 (Routine)
21 August 1920	Uccle, BE	daily low max	14.4 C (57.9 F)	1.7 C (3.1 F)	34 years	22 of 100 (Routine)
21 August 1920	Koffiefontein (Pol), ZA	daily rain	19.1 mm (0.8 in)	12.5 mm (0.5 in)	40 years	20 of 100 (Routine)
21 August 1920	Kenhardt (Pol), ZA	daily rain	8.1 mm (0.32 in)	8.1 mm (0.32 in)	41 years	20 of 100 (Routine)
21 August 1920	Hermannsburg, AU	daily rain	3.6 mm (0.14 in)	3.6 mm (0.14 in)	31 years	20 of 100 (Routine)
21 August 1920	Svenska Hogarna, SE	daily rain	21.3 mm (0.8 in)	9.5 mm (0.37 in)	8 years	19 of 100 (Routine)
21 August 1920	Charlotte Waters, AU	daily rain	1.0 mm (0.04 in)	1.0 mm (0.04 in)	45 years	18 of 100 (Routine)
21 August 1920	Nurnberg, DE	daily low min	6.3 C (43.3 F)	1.4 C (2.5 F)	34 years	18 of 100 (Routine)
21 August 1920	Aliwal North, ZA	daily rain	9.7 mm (0.38 in)	7.7 mm (0.30 in)	20 years	18 of 100 (Routine)
21 August 1920	Lady Grey (Pol), ZA	daily rain	6.6 mm (0.26 in)	6.6 mm (0.26 in)	31 years	18 of 100 (Routine)
21 August 1920	Morris W Cntrl Rsch & Outreach, US	daily low min	4.4 C (39.9 F)	4.5 C (8.1 F)	15 years	18 of 100 (Routine)
21 August 1920	Alice Springs Post Office, AU	daily rain	0.5 mm (0.02 in)	0.5 mm (0.02 in)	45 years	17 of 100 (Routine)
21 August 1920	Minnedosa, CA	daily low min	-2.2 C (28.0 F)	2.2 C (4.0 F)	29 years	17 of 100 (Routine)
21 August 1920	Bremen-Seefahrtschule, DE	monthly low max	13.0 C (55.4 F)	0.4 C (0.7 F)	10 years	17 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

1800 to 1920

Records set or tied on this calendar date in each year from 1800 to 1920. 1920 had 59 records.

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

Records on 08-21 in each year
Year	Records
1800	1
1802	1
1804	1
1807	1
1816	1
1818	1
1832	1
1834	1
1839	3
1843	1
1847	1
1849	3
1850	1
1851	2
1863	1
1866	1
1867	2
1870	3
1871	2
1872	1
1873	1
1876	1
1877	2
1879	2
1884	2
1885	5
1886	1
1887	5
1888	2
1889	3
1890	4
1891	2
1893	4
1894	8
1895	3
1896	2
1897	4
1898	4
1899	7
1900	4
1901	9
1902	8
1903	6
1904	8
1905	4
1906	22
1907	20
1908	13
1909	17
1910	33
1911	19
1912	50
1913	37
1914	24
1915	21
1916	106
1917	101
1918	202
1919	19
1920	59
1921	34
1922	58
1923	111
1924	135
1925	220
1926	227
1927	228
1928	110
1929	234
1930	297
1931	277
1932	264
1933	328
1934	320
1935	318
1936	807
1937	762
1938	239
1939	630
1940	683
1941	180
1942	415
1943	438
1944	346
1945	544
1946	390
1947	954
1948	305
1949	508
1950	958
1951	699
1952	368
1953	331
1954	497
1955	885
1956	701
1957	490
1958	389
1959	704
1960	490
1961	644
1962	469
1963	338
1964	794
1965	455
1966	661
1967	541
1968	1,014
1969	650
1970	373
1971	660
1972	441
1973	438
1974	564
1975	545
1976	756
1977	764
1978	445
1979	778
1980	904
1981	1,015
1982	769
1983	1,407
1984	975
1985	623
1986	1,166
1987	740
1988	889
1989	828
1990	910
1991	828
1992	957
1993	698
1994	968
1995	962
1996	950
1997	1,291
1998	948
1999	717
2000	861
2001	797
2002	965
2003	1,241
2004	1,585
2005	1,071
2006	797
2007	1,829
2008	1,012
2009	1,319
2010	1,155
2011	1,022
2012	990
2013	513
2014	624
2015	651
2016	890
2017	347
2018	816
2019	631
2020	1,147
2021	767
2022	917
2023	1,826
2024	777
2025	1,230
2026	1,289

Download the Data

Data for records on 1920-08-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 5	41
5 to 10	9
10 to 15	3
15 to 20	0
20 to 25	1
25 to 30	0
30 to 35	1