Weather Records on 20 September 1923

249 weather records were set or tied worldwide on 20 September 1923. Highest significance: Moonta, AU.

Key Facts for 20 September 1923

On 20 September 1923, 249 weather records were set or tied at long-record stations worldwide.
20 were record highs and 20 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 235 daily.
Moonta set a daily record precipitation of 31.8 mm (1.3 in) on 20 September 1923.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 443 records.

Record Map

249 stations

249 station records on 20 September 1923 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1923: highest significance records shown on the map
Station	Country	Type	Value	Significance
Moonta	Australia	Record daily precipitation	31.8 mm (1.3 in)	56 of 100 (Notable)
Virginia Sheedy Road	Australia	Record daily precipitation	28.4 mm (1.1 in)	55 of 100 (Notable)
Kadina	Australia	Record daily precipitation	29.7 mm (1.2 in)	52 of 100 (Notable)
Wallaroo	Australia	Record daily precipitation	26.2 mm (1.0 in)	50 of 100 (Notable)
Coulta	Australia	Record daily precipitation	31.8 mm (1.3 in)	48 of 100 (Notable)
Happy Valley Reservoir	Australia	Record daily precipitation	45.0 mm (1.8 in)	48 of 100 (Notable)
Willunga	Australia	Record daily precipitation	31.2 mm (1.2 in)	48 of 100 (Notable)
Edithburgh Post Office	Australia	Record daily precipitation	26.9 mm (1.1 in)	47 of 100 (Notable)
Maitland (Weetulta)	Australia	Record daily precipitation	43.2 mm (1.7 in)	47 of 100 (Notable)
Belair (State Flora Nursery)	Australia	Record daily precipitation	41.1 mm (1.6 in)	47 of 100 (Notable)
Maitland (Woodburlie)	Australia	Record daily precipitation	34.3 mm (1.4 in)	46 of 100 (Notable)
Maitland	Australia	Record daily precipitation	35.1 mm (1.4 in)	46 of 100 (Notable)
Minlaton	Australia	Record daily precipitation	32.8 mm (1.3 in)	46 of 100 (Notable)
Magill Post Office	Australia	Record daily precipitation	41.9 mm (1.6 in)	46 of 100 (Notable)
Mallala	Australia	Record daily precipitation	33.0 mm (1.3 in)	46 of 100 (Notable)
Mitcham Post Office	Australia	Record daily precipitation	39.6 mm (1.6 in)	46 of 100 (Notable)
Adelaide (Thorndon Park)	Australia	Record daily precipitation	38.6 mm (1.5 in)	46 of 100 (Notable)
Coromandel Valley (Branden)	Australia	Record daily precipitation	45.7 mm (1.8 in)	46 of 100 (Notable)
Old Noarlunga Post Office	Australia	Record daily precipitation	30.5 mm (1.2 in)	46 of 100 (Notable)
Milwaukee Wb City	United States	Record daily precipitation	86.4 mm (3.4 in)	46 of 100 (Notable)
Curramulka	Australia	Record daily precipitation	31.0 mm (1.2 in)	45 of 100 (Notable)
Stansbury	Australia	Record daily precipitation	29.5 mm (1.2 in)	45 of 100 (Notable)
Ardrossan (Winulta)	Australia	Record daily precipitation	31.8 mm (1.3 in)	45 of 100 (Notable)
Glenelg Post Office	Australia	Record daily precipitation	33.0 mm (1.3 in)	45 of 100 (Notable)
Adelaide (Salisbury Bowling Cl	Australia	Record daily precipitation	39.9 mm (1.6 in)	45 of 100 (Notable)
Adelaide (Morphett Vale)	Australia	Record daily precipitation	41.4 mm (1.6 in)	45 of 100 (Notable)
Normanville	Australia	Record daily precipitation	31.2 mm (1.2 in)	45 of 100 (Notable)
Meningie	Australia	Record daily precipitation	25.9 mm (1.0 in)	45 of 100 (Notable)
Ardrossan	Australia	Record daily precipitation	30.2 mm (1.2 in)	44 of 100 (Notable)
Paskeville	Australia	Record daily precipitation	34.3 mm (1.4 in)	41 of 100 (Notable)
Edmonton	Canada	Record daily snowfall	12.7 cm (5.0 in)	41 of 100 (Notable)
Cooke Plains	Australia	Record daily precipitation	42.2 mm (1.7 in)	40 of 100 (Notable)
Frances	Australia	Record daily precipitation	28.4 mm (1.1 in)	40 of 100 (Notable)
Sturt	Australia	Record daily precipitation	31.0 mm (1.2 in)	39 of 100 (Notable)
Cape Otway Lighthouse	Australia	Record daily precipitation	32.0 mm (1.3 in)	38 of 100 (Notable)
Coleraine (Tulse Hill)	Australia	Record daily precipitation	44.5 mm (1.8 in)	37 of 100 (Notable)
Carapook (the Gums)	Australia	Record daily precipitation	35.1 mm (1.4 in)	37 of 100 (Notable)
Williamstown	Australia	Record daily precipitation	27.7 mm (1.1 in)	36 of 100 (Notable)
Hartington	United States	Record daily precipitation	68.6 mm (2.7 in)	36 of 100 (Notable)
Adelaide West Terrace	Australia	Record daily precipitation	40.4 mm (1.6 in)	35 of 100 (Notable)
Uraidla	Australia	Record daily precipitation	53.6 mm (2.1 in)	35 of 100 (Notable)
Naracoorte	Australia	Record daily precipitation	32.8 mm (1.3 in)	35 of 100 (Notable)
Gawler Council Depot	Australia	Record daily precipitation	26.7 mm (1.1 in)	34 of 100 (Routine)
Agassiz Cda	Canada	Record daily precipitation	51.8 mm (2.0 in)	34 of 100 (Routine)
Wauseon Wtp	United States	Record daily precipitation	35.8 mm (1.4 in)	34 of 100 (Routine)
Port Clinton (Yararoo)	Australia	Record daily precipitation	28.4 mm (1.1 in)	33 of 100 (Routine)
Adelaide (Tea Tree Gully Counc	Australia	Record daily precipitation	36.8 mm (1.4 in)	33 of 100 (Routine)
Edenhope (Post Office)	Australia	Record daily precipitation	30.0 mm (1.2 in)	33 of 100 (Routine)
Lyndoch	Australia	Record daily precipitation	26.7 mm (1.1 in)	32 of 100 (Routine)
Yankalilla (Woodvale)	Australia	Record daily precipitation	29.2 mm (1.1 in)	32 of 100 (Routine)
Roseworthy	Australia	Record daily precipitation	36.8 mm (1.4 in)	31 of 100 (Routine)
Fairmont	United States	Record daily precipitation	38.6 mm (1.5 in)	30 of 100 (Routine)
La Crosse Wb City	United States	Record daily precipitation	34.0 mm (1.3 in)	30 of 100 (Routine)
Naracoorte Cave Range	Australia	Record daily precipitation	31.5 mm (1.2 in)	29 of 100 (Routine)
Fayette	United States	Record daily precipitation	50.8 mm (2.0 in)	29 of 100 (Routine)
Viroqua	United States	Record daily precipitation	58.9 mm (2.3 in)	28 of 100 (Routine)
Macclesfield	Australia	Record daily precipitation	34.5 mm (1.4 in)	27 of 100 (Routine)
Casterton (Warrock)	Australia	Record daily precipitation	35.6 mm (1.4 in)	27 of 100 (Routine)
Hamilton	Australia	Record daily precipitation	25.7 mm (1.0 in)	27 of 100 (Routine)
Roseworthy Agric College	Australia	Record daily precipitation	31.2 mm (1.2 in)	26 of 100 (Routine)

Counts by Type and Timescale

249 records

Records set or tied on 20 September 1923 by type: Highest daily maximum 6, Lowest daily maximum 18, Highest daily minimum 14, Lowest daily minimum 2, Heaviest daily rainfall 208, Heaviest daily snowfall 1.

Records on 20 September 1923 by type
Record type	Records
Highest daily maximum	6
Lowest daily maximum	18
Highest daily minimum	14
Lowest daily minimum	2
Heaviest daily rainfall	208
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 20 September 1923 by timescale: all-time 0, monthly 14, daily 235.

How Much Records Were Beaten By

234 broken records

Margins by which the 234 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

20 September 1923

Top 20 records on 20 September 1923 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1923	Moonta, AU	daily rain	31.8 mm (1.3 in)	23.9 mm (0.9 in)	38 years	56 of 100 (Notable)
20 September 1923	Virginia Sheedy Road, AU	daily rain	28.4 mm (1.1 in)	24.3 mm (1.0 in)	38 years	55 of 100 (Notable)
20 September 1923	Kadina, AU	daily rain	29.7 mm (1.2 in)	19.3 mm (0.8 in)	30 years	52 of 100 (Notable)
20 September 1923	Wallaroo, AU	daily rain	26.2 mm (1.0 in)	18.3 mm (0.7 in)	30 years	50 of 100 (Notable)
20 September 1923	Coulta, AU	daily rain	31.8 mm (1.3 in)	17.8 mm (0.7 in)	14 years	48 of 100 (Notable)
20 September 1923	Happy Valley Reservoir, AU	daily rain	45.0 mm (1.8 in)	36.6 mm (1.4 in)	8 years	48 of 100 (Notable)
20 September 1923	Willunga, AU	daily rain	31.2 mm (1.2 in)	25.1 mm (1.0 in)	12 years	48 of 100 (Notable)
20 September 1923	Edithburgh Post Office, AU	daily rain	26.9 mm (1.1 in)	20.8 mm (0.8 in)	12 years	47 of 100 (Notable)
20 September 1923	Maitland (Weetulta), AU	daily rain	43.2 mm (1.7 in)	31.8 mm (1.3 in)	14 years	47 of 100 (Notable)
20 September 1923	Belair (State Flora Nursery), AU	daily rain	41.1 mm (1.6 in)	33.5 mm (1.3 in)	12 years	47 of 100 (Notable)
20 September 1923	Maitland (Woodburlie), AU	daily rain	34.3 mm (1.4 in)	18.0 mm (0.7 in)	31 years	46 of 100 (Notable)
20 September 1923	Maitland, AU	daily rain	35.1 mm (1.4 in)	22.7 mm (0.9 in)	8 years	46 of 100 (Notable)
20 September 1923	Minlaton, AU	daily rain	32.8 mm (1.3 in)	24.7 mm (1.0 in)	8 years	46 of 100 (Notable)
20 September 1923	Magill Post Office, AU	daily rain	41.9 mm (1.6 in)	35.0 mm (1.4 in)	12 years	46 of 100 (Notable)
20 September 1923	Mallala, AU	daily rain	33.0 mm (1.3 in)	23.6 mm (0.9 in)	8 years	46 of 100 (Notable)
20 September 1923	Mitcham Post Office, AU	daily rain	39.6 mm (1.6 in)	26.9 mm (1.1 in)	8 years	46 of 100 (Notable)
20 September 1923	Adelaide (Thorndon Park), AU	daily rain	38.6 mm (1.5 in)	25.6 mm (1.0 in)	8 years	46 of 100 (Notable)
20 September 1923	Coromandel Valley (Branden), AU	daily rain	45.7 mm (1.8 in)	34.8 mm (1.4 in)	12 years	46 of 100 (Notable)
20 September 1923	Old Noarlunga Post Office, AU	daily rain	30.5 mm (1.2 in)	26.4 mm (1.0 in)	8 years	46 of 100 (Notable)
20 September 1923	Milwaukee Wb City, US	daily rain	86.4 mm (3.4 in)	54.1 mm (2.1 in)	4 years	46 of 100 (Notable)

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 1923

Records set or tied on this calendar date in each year from 1812 to 1923. 1923 had 249 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 1923-09-20: 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 20	199
20 to 40	32
40 to 60	2
60 to 80	0
80 to 100	0
100 to 120	0
120 to 140	1