Weather Records on 21 September 1923

232 weather records were set or tied worldwide on 21 September 1923. Highest significance: Kanmantoo, AU.

Key Facts for 21 September 1923

On 21 September 1923, 232 weather records were set or tied at long-record stations worldwide.
19 were record highs and 11 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 229 daily.
Kanmantoo set a daily record precipitation of 44.5 mm (1.8 in) on 21 September 1923.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 452 records.

Record Map

232 stations

232 station records on 21 September 1923 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1923: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kanmantoo	Australia	Record daily precipitation	44.5 mm (1.8 in)	51 of 100 (Notable)
Meadows	Australia	Record daily precipitation	54.6 mm (2.1 in)	46 of 100 (Notable)
Callington	Australia	Record daily precipitation	32.8 mm (1.3 in)	46 of 100 (Notable)
Clarendon	Australia	Record daily precipitation	37.3 mm (1.5 in)	44 of 100 (Notable)
Westminster	Canada	Record daily precipitation	39.6 mm (1.6 in)	42 of 100 (Notable)
Mount Pleasant	Australia	Record daily precipitation	35.6 mm (1.4 in)	40 of 100 (Notable)
Port Lincoln (Woolga)	Australia	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)
Sturt	Australia	Record daily precipitation	25.9 mm (1.0 in)	38 of 100 (Notable)
Cooke Plains	Australia	Record daily precipitation	25.7 mm (1.0 in)	38 of 100 (Notable)
Happy Valley Reservoir	Australia	Record daily precipitation	28.4 mm (1.1 in)	37 of 100 (Notable)
Macclesfield	Australia	Record daily precipitation	43.2 mm (1.7 in)	37 of 100 (Notable)
Setauket Strong	United States	Record daily precipitation	46.5 mm (1.8 in)	34 of 100 (Routine)
Belair (State Flora Nursery)	Australia	Record daily precipitation	32.5 mm (1.3 in)	33 of 100 (Routine)
Mount Barker	Australia	Record daily precipitation	44.2 mm (1.7 in)	33 of 100 (Routine)
Edithburgh Post Office	Australia	Record daily precipitation	27.4 mm (1.1 in)	32 of 100 (Routine)
Warooka	Australia	Record daily precipitation	26.7 mm (1.1 in)	32 of 100 (Routine)
North Adelaide	Australia	Record daily precipitation	25.9 mm (1.0 in)	32 of 100 (Routine)
Adelaide (Morphett Vale)	Australia	Record daily precipitation	31.0 mm (1.2 in)	32 of 100 (Routine)
Mortlake	Australia	Record daily precipitation	25.4 mm (1.0 in)	32 of 100 (Routine)
Bridgewater	Australia	Record daily precipitation	49.5 mm (1.9 in)	31 of 100 (Routine)
Coromandel Valley (Branden)	Australia	Record daily precipitation	27.9 mm (1.1 in)	31 of 100 (Routine)
Woolsthorpe	Australia	Record daily precipitation	27.2 mm (1.1 in)	31 of 100 (Routine)
Glenville	United States	Record daily precipitation	51.1 mm (2.0 in)	30 of 100 (Routine)
Old Noarlunga Post Office	Australia	Record daily precipitation	34.3 mm (1.4 in)	29 of 100 (Routine)
Woodside	Australia	Record daily precipitation	42.2 mm (1.7 in)	29 of 100 (Routine)
Birdwood	Australia	Record daily precipitation	27.9 mm (1.1 in)	27 of 100 (Routine)
Merino (Glenorchy Estate)	Australia	Record daily precipitation	25.7 mm (1.0 in)	26 of 100 (Routine)
La Crosse River	United States	Record daily precipitation	35.1 mm (1.4 in)	25 of 100 (Routine)
Port Campbell Post Office	Australia	Record daily precipitation	25.1 mm (1.0 in)	24 of 100 (Routine)
Brantford	Canada	Record daily precipitation	39.6 mm (1.6 in)	24 of 100 (Routine)
Fairlight Station	Australia	Record daily precipitation	26.4 mm (1.0 in)	22 of 100 (Routine)
Jamieson	Australia	Record daily precipitation	35.6 mm (1.4 in)	22 of 100 (Routine)
Cape Otway Lighthouse	Australia	Record low maximum temperature	11.1 C (52.0 F)	22 of 100 (Routine)
Hamilton	Canada	Record daily precipitation	35.6 mm (1.4 in)	22 of 100 (Routine)
Deniliquin (Wilkinson St)	Australia	Record low maximum temperature	14.0 C (57.2 F)	21 of 100 (Routine)
Bright Post Office	Australia	Record daily precipitation	34.3 mm (1.4 in)	21 of 100 (Routine)
Gloversville	United States	Record daily precipitation	43.2 mm (1.7 in)	21 of 100 (Routine)
Rowlesburg 1	United States	Record daily precipitation	33.0 mm (1.3 in)	21 of 100 (Routine)
Murray Bridge Comparison	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Fountain Forest Reserve	Australia	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Sedan	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Murray Bridge (Tepko)	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Coulta	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Stokes	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Morrisons (Ballark)	Australia	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Marrabel	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Glenelg Post Office	Australia	Record daily precipitation	22.6 mm (0.9 in)	20 of 100 (Routine)
Eudunda	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Quambatook South	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Serviceton	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Mitcham Post Office	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Tarlee	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Malmsbury Reservoir	Australia	Record daily precipitation	16.0 mm (0.6 in)	20 of 100 (Routine)
Magill Post Office	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Langhorne Creek	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Lillimur Estate	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Expedition Pass Reservoir	Australia	Record daily precipitation	10.7 mm (0.4 in)	20 of 100 (Routine)
Port Fairy (Griffiths Island)	Australia	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Ardrossan (Winulta)	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Yorketown	Australia	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)

Counts by Type and Timescale

232 records

Records set or tied on 21 September 1923 by type: Highest daily maximum 5, Lowest daily maximum 11, Highest daily minimum 14, Heaviest daily rainfall 201, Heaviest daily snowfall 1.

Records on 21 September 1923 by type
Record type	Records
Highest daily maximum	5
Lowest daily maximum	11
Highest daily minimum	14
Lowest daily minimum	0
Heaviest daily rainfall	201
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 21 September 1923 by timescale: all-time 0, monthly 3, daily 229.

How Much Records Were Beaten By

216 broken records

Margins by which the 216 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 46.0. Ties are not counted.

Top 20 by Significance

21 September 1923

Top 20 records on 21 September 1923 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1923	Kanmantoo, AU	daily rain	44.5 mm (1.8 in)	22.9 mm (0.9 in)	36 years	51 of 100 (Notable)
21 September 1923	Meadows, AU	daily rain	54.6 mm (2.1 in)	32.2 mm (1.3 in)	21 years	46 of 100 (Notable)
21 September 1923	Callington, AU	daily rain	32.8 mm (1.3 in)	16.5 mm (0.6 in)	36 years	46 of 100 (Notable)
21 September 1923	Clarendon, AU	daily rain	37.3 mm (1.5 in)	21.0 mm (0.8 in)	36 years	44 of 100 (Notable)
21 September 1923	Westminster, CA	daily rain	39.6 mm (1.6 in)	32.5 mm (1.3 in)	26 years	42 of 100 (Notable)
21 September 1923	Mount Pleasant, AU	daily rain	35.6 mm (1.4 in)	19.1 mm (0.8 in)	38 years	40 of 100 (Notable)
21 September 1923	Port Lincoln (Woolga), AU	daily rain	25.4 mm (1.0 in)	15.0 mm (0.6 in)	30 years	39 of 100 (Notable)
21 September 1923	Sturt, AU	daily rain	25.9 mm (1.0 in)	19.8 mm (0.8 in)	5 years	38 of 100 (Notable)
21 September 1923	Cooke Plains, AU	daily rain	25.7 mm (1.0 in)	15.5 mm (0.6 in)	6 years	38 of 100 (Notable)
21 September 1923	Happy Valley Reservoir, AU	daily rain	28.4 mm (1.1 in)	17.0 mm (0.7 in)	6 years	37 of 100 (Notable)
21 September 1923	Macclesfield, AU	daily rain	43.2 mm (1.7 in)	17.0 mm (0.7 in)	36 years	37 of 100 (Notable)
21 September 1923	Setauket Strong, US	daily rain	46.5 mm (1.8 in)	31.3 mm (1.2 in)	34 years	34 of 100 (Routine)
21 September 1923	Belair (State Flora Nursery), AU	daily rain	32.5 mm (1.3 in)	12.2 mm (0.5 in)	38 years	33 of 100 (Routine)
21 September 1923	Mount Barker, AU	daily rain	44.2 mm (1.7 in)	12.4 mm (0.5 in)	36 years	33 of 100 (Routine)
21 September 1923	Edithburgh Post Office, AU	daily rain	27.4 mm (1.1 in)	11.7 mm (0.5 in)	6 years	32 of 100 (Routine)
21 September 1923	Warooka, AU	daily rain	26.7 mm (1.1 in)	12.0 mm (0.5 in)	6 years	32 of 100 (Routine)
21 September 1923	North Adelaide, AU	daily rain	25.9 mm (1.0 in)	14.5 mm (0.6 in)	6 years	32 of 100 (Routine)
21 September 1923	Adelaide (Morphett Vale), AU	daily rain	31.0 mm (1.2 in)	15.8 mm (0.6 in)	6 years	32 of 100 (Routine)
21 September 1923	Mortlake, AU	daily rain	25.4 mm (1.0 in)	13.5 mm (0.5 in)	14 years	32 of 100 (Routine)
21 September 1923	Bridgewater, AU	daily rain	49.5 mm (1.9 in)	15.2 mm (0.6 in)	38 years	31 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

1805 to 1923

Records set or tied on this calendar date in each year from 1805 to 1923. 1923 had 232 records.

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

Records on 09-21 in each year
Year	Records
1805	1
1812	1
1825	2
1840	1
1841	1
1842	1
1848	1
1854	1
1856	2
1868	1
1872	2
1873	1
1877	1
1878	1
1881	1
1882	1
1884	1
1886	1
1888	2
1889	1
1891	10
1892	1
1893	10
1894	2
1895	3
1896	2
1897	6
1898	6
1899	3
1900	2
1901	5
1902	5
1903	8
1904	20
1905	12
1906	17
1907	10
1908	17
1909	10
1910	8
1911	18
1912	26
1913	37
1914	29
1915	34
1916	48
1917	28
1918	43
1919	54
1920	29
1921	64
1922	35
1923	232
1924	291
1925	278
1926	178
1927	165
1928	81
1929	232
1930	82
1931	681
1932	242
1933	193
1934	492
1935	199
1936	329
1937	487
1938	508
1939	308
1940	908
1941	416
1942	291
1943	407
1944	413
1945	507
1946	176
1947	534
1948	301
1949	298
1950	334
1951	241
1952	430
1953	382
1954	453
1955	752
1956	1,100
1957	366
1958	588
1959	513
1960	418
1961	441
1962	1,085
1963	306
1964	374
1965	1,088
1966	565
1967	577
1968	790
1969	593
1970	708
1971	645
1972	599
1973	421
1974	652
1975	528
1976	694
1977	918
1978	818
1979	736
1980	990
1981	696
1982	1,484
1983	2,207
1984	707
1985	796
1986	671
1987	965
1988	557
1989	1,002
1990	716
1991	1,021
1992	752
1993	911
1994	713
1995	2,002
1996	1,233
1997	1,112
1998	1,481
1999	1,025
2000	884
2001	718
2002	696
2003	959
2004	888
2005	1,143
2006	920
2007	742
2008	740
2009	715
2010	1,290
2011	542
2012	595
2013	769
2014	716
2015	565
2016	989
2017	1,178
2018	1,051
2019	833
2020	580
2021	465
2022	1,049
2023	783
2024	470
2025	591
2026	478

Download the Data

Data for records on 1923-09-21: 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 10	167
10 to 20	39
20 to 30	5
30 to 40	4
40 to 50	1