Weather Records on 20 September 1921

40 weather records were set or tied worldwide on 20 September 1921. Highest significance: Algiers-Ville/Universite, DZ.

Key Facts for 20 September 1921

On 20 September 1921, 40 weather records were set or tied at long-record stations worldwide.
18 were record highs and 9 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 40 daily.
Algiers-Ville/Universite set a daily record high maximum temperature of 37.0 C (98.6 F) on 20 September 1921.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 445 records.

Record Map

40 stations

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

Weather records on 20 September 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Algiers-Ville/Universite	Algeria	Record high maximum temperature	37.0 C (98.6 F)	22 of 100 (Routine)
Stonecliffe	Canada	Record low minimum temperature	-7.8 C (18.0 F)	21 of 100 (Routine)
Maly Uzen'	Russia	Record daily precipitation	16.7 mm (0.7 in)	20 of 100 (Routine)
Innamincka Station	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Woodstock West	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Carrieton (Pamatta)	Australia	Record daily precipitation	14.5 mm (0.6 in)	17 of 100 (Routine)
Kiev	Ukraine	Record low minimum temperature	0.0 C (32.0 F)	17 of 100 (Routine)
Herberton White St	Australia	Record daily precipitation	9.9 mm (0.39 in)	16 of 100 (Routine)
Shearleys Tank	Australia	Record daily precipitation	4.6 mm (0.18 in)	16 of 100 (Routine)
Alma	United States	Record daily precipitation	26.7 mm (1.1 in)	16 of 100 (Routine)
Brinkley	United States	Record high minimum temperature	23.9 C (75.0 F)	15 of 100 (Routine)
Lake Eildon	Australia	Record daily precipitation	20.6 mm (0.8 in)	14 of 100 (Routine)
Hogsback (Bos)	South Africa	Record daily precipitation	20.3 mm (0.8 in)	14 of 100 (Routine)
Uman	Ukraine	Record low minimum temperature	-0.5 C (31.1 F)	14 of 100 (Routine)
Fort National	Algeria	Record high maximum temperature	33.0 C (91.4 F)	13 of 100 (Routine)
Pine Bluff	United States	Record high maximum temperature	36.7 C (98.1 F)	13 of 100 (Routine)
Vastervik	Sweden	Record low minimum temperature	2.0 C (35.6 F)	12 of 100 (Routine)
Adrian 2 NNE	United States	Record daily precipitation	21.8 mm (0.9 in)	12 of 100 (Routine)
Cape Borda Comparison	Australia	Record daily precipitation	12.4 mm (0.5 in)	11 of 100 (Routine)
Pine Bluff	United States	Record high minimum temperature	22.8 C (73.0 F)	11 of 100 (Routine)
Batesville	United States	Record high minimum temperature	22.2 C (72.0 F)	11 of 100 (Routine)
Louisville	United States	Record high minimum temperature	22.2 C (72.0 F)	11 of 100 (Routine)
Winnemucca AP	United States	Record low minimum temperature	-2.8 C (27.0 F)	11 of 100 (Routine)
Ekaterinburg	Russia	Record low maximum temperature	4.8 C (40.6 F)	10 of 100 (Routine)
Lawrence	United States	Record daily precipitation	26.7 mm (1.1 in)	9 of 100 (Routine)
Bogoroditskoye-Fenino	Russia	Record low minimum temperature	-0.5 C (31.1 F)	8 of 100 (Routine)
Plauen	Germany	Record low minimum temperature	-1.0 C (30.2 F)	7 of 100 (Routine)
Camden 1	United States	Record high maximum temperature	36.1 C (97.0 F)	7 of 100 (Routine)
Fort National	Algeria	Record high minimum temperature	24.0 C (75.2 F)	5 of 100 (Routine)
Malvern	United States	Record high minimum temperature	21.7 C (71.1 F)	5 of 100 (Routine)
Franklin	United States	Record high minimum temperature	17.2 C (63.0 F)	5 of 100 (Routine)
Newport	United States	Record high minimum temperature	23.3 C (73.9 F)	4 of 100 (Routine)
Jonkoping	Sweden	Record low minimum temperature	1.5 C (34.7 F)	3 of 100 (Routine)
Prince Albert	Canada	Record high minimum temperature	7.8 C (46.0 F)	2 of 100 (Routine)
Sfax El-Maou	Tunisia	Record high maximum temperature	38.0 C (100.4 F)	2 of 100 (Routine)
Stuttgart	United States	Record high minimum temperature	22.8 C (73.0 F)	2 of 100 (Routine)
Houston Wb City	United States	Record high minimum temperature	24.4 C (75.9 F)	2 of 100 (Routine)
Jingellic	Australia	Record daily precipitation	17.8 mm (0.7 in)	1 of 100 (Routine)
Constantine	Algeria	Record high maximum temperature	35.0 C (95.0 F)	0 of 100 (Routine)
Constantine	Algeria	Record high minimum temperature	20.0 C (68.0 F)	0 of 100 (Routine)

Counts by Type and Timescale

40 records

Records set or tied on 20 September 1921 by type: Highest daily maximum 6, Lowest daily maximum 1, Highest daily minimum 12, Lowest daily minimum 8, Heaviest daily rainfall 13.

Records on 20 September 1921 by type
Record type	Records
Highest daily maximum	6
Lowest daily maximum	1
Highest daily minimum	12
Lowest daily minimum	8
Heaviest daily rainfall	13
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1921 by timescale: all-time 0, monthly 0, daily 40.

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 16.8. Ties are not counted.

Top 20 by Significance

20 September 1921

Top 20 records on 20 September 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1921	Algiers-Ville/Universite, DZ	daily high max	37.0 C (98.6 F)	5.0 C (9.0 F)	10 years	22 of 100 (Routine)
20 September 1921	Stonecliffe, CA	daily low min	-7.8 C (18.0 F)	5.6 C (10.1 F)	20 years	21 of 100 (Routine)
20 September 1921	Maly Uzen', RU	daily rain	16.7 mm (0.7 in)	9.0 mm (0.35 in)	18 years	20 of 100 (Routine)
20 September 1921	Innamincka Station, AU	daily rain	16.8 mm (0.7 in)	16.8 mm (0.7 in)	37 years	20 of 100 (Routine)
20 September 1921	Woodstock West, AU	daily rain	19.1 mm (0.8 in)	5.4 mm (0.21 in)	34 years	20 of 100 (Routine)
20 September 1921	Carrieton (Pamatta), AU	daily rain	14.5 mm (0.6 in)	3.8 mm (0.15 in)	28 years	17 of 100 (Routine)
20 September 1921	Kiev, UA	daily low min	0.0 C (32.0 F)	1.3 C (2.3 F)	34 years	17 of 100 (Routine)
20 September 1921	Herberton White St, AU	daily rain	9.9 mm (0.39 in)	1.8 mm (0.07 in)	32 years	16 of 100 (Routine)
20 September 1921	Shearleys Tank, AU	daily rain	4.6 mm (0.18 in)	1.3 mm (0.05 in)	36 years	16 of 100 (Routine)
20 September 1921	Alma, US	daily rain	26.7 mm (1.1 in)	14.0 mm (0.6 in)	8 years	16 of 100 (Routine)
20 September 1921	Brinkley, US	daily high min	23.9 C (75.0 F)	2.8 C (5.0 F)	25 years	15 of 100 (Routine)
20 September 1921	Lake Eildon, AU	daily rain	20.6 mm (0.8 in)	7.9 mm (0.31 in)	8 years	14 of 100 (Routine)
20 September 1921	Hogsback (Bos), ZA	daily rain	20.3 mm (0.8 in)	3.0 mm (0.12 in)	32 years	14 of 100 (Routine)
20 September 1921	Uman, UA	daily low min	-0.5 C (31.1 F)	0.8 C (1.4 F)	32 years	14 of 100 (Routine)
20 September 1921	Fort National, DZ	daily high max	33.0 C (91.4 F)	1.0 C (1.8 F)	28 years	13 of 100 (Routine)
20 September 1921	Pine Bluff, US	daily high max	36.7 C (98.1 F)	1.7 C (3.1 F)	25 years	13 of 100 (Routine)
20 September 1921	Vastervik, SE	daily low min	2.0 C (35.6 F)	1.0 C (1.8 F)	19 years	12 of 100 (Routine)
20 September 1921	Adrian 2 NNE, US	daily rain	21.8 mm (0.9 in)	4.8 mm (0.19 in)	20 years	12 of 100 (Routine)
20 September 1921	Cape Borda Comparison, AU	daily rain	12.4 mm (0.5 in)	1.2 mm (0.05 in)	12 years	11 of 100 (Routine)
20 September 1921	Pine Bluff, US	daily high min	22.8 C (73.0 F)	0.6 C (1.1 F)	25 years	11 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

1812 to 1921

Records set or tied on this calendar date in each year from 1812 to 1921. 1921 had 40 records.

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

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 1921-09-20: 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).

Margin	Records
0 to 3	21
3 to 5	4
5 to 8	3
8 to 10	2
10 to 13	0
13 to 15	1
15 to 18	1