Weather Records on 11 September 1973

612 weather records were set or tied worldwide on 11 September 1973. Highest significance: Musgrave, AU.

Key Facts for 11 September 1973

On 11 September 1973, 612 weather records were set or tied at long-record stations worldwide.
141 were record highs and 138 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 26 monthly and 585 daily.
Musgrave set a monthly record daily precipitation of 76.2 mm (3.0 in) on 11 September 1973.
Across 164 earlier years (1809 to 2026) the same calendar date averaged 422 records.

Record Map

612 stations

612 station records on 11 September 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 September 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Musgrave	Australia	Record daily precipitation	76.2 mm (3.0 in)	76 of 100 (Major)
Sao Miguel Dos Campos	Brazil	Record daily precipitation	99.8 mm (3.9 in)	69 of 100 (Major)
Torrington Exp Farm	United States	Record daily precipitation	69.3 mm (2.7 in)	67 of 100 (Major)
Danevang 1 W	United States	Record daily precipitation	131.6 mm (5.2 in)	65 of 100 (Major)
Senador Pompeu	Brazil	Record daily precipitation	68.6 mm (2.7 in)	64 of 100 (Major)
Sertania (Alagoa de Baixo)	Brazil	Record daily precipitation	52.0 mm (2.0 in)	64 of 100 (Major)
Alliance 1WNW	United States	Record daily precipitation	48.3 mm (1.9 in)	64 of 100 (Major)
Princesa Isabel	Brazil	Record daily precipitation	30.2 mm (1.2 in)	62 of 100 (Major)
Acude Nova Floresta	Brazil	Record daily precipitation	49.3 mm (1.9 in)	60 of 100 (Major)
Junqueiro	Brazil	Record daily precipitation	85.5 mm (3.4 in)	60 of 100 (Major)
Porto Real Do Colegio	Brazil	Record daily precipitation	48.0 mm (1.9 in)	59 of 100 (Notable)
Cooktown Post Office	Australia	Record daily precipitation	34.5 mm (1.4 in)	58 of 100 (Notable)
Rock Springs	United States	Record daily precipitation	51.3 mm (2.0 in)	57 of 100 (Notable)
Mineirolandia	Brazil	Record daily precipitation	75.1 mm (3.0 in)	56 of 100 (Notable)
Feiticeiro	Brazil	Record daily precipitation	49.8 mm (2.0 in)	56 of 100 (Notable)
Sao Luiz Do Quitunde	Brazil	Record daily precipitation	120.0 mm (4.7 in)	55 of 100 (Notable)
Algazy Ostrov	Kazakhstan	Record daily precipitation	35.9 mm (1.4 in)	54 of 100 (Notable)
Chugwater	United States	Record daily precipitation	63.5 mm (2.5 in)	54 of 100 (Notable)
Poco Das Trincheiras	Brazil	Record daily precipitation	42.6 mm (1.7 in)	53 of 100 (Notable)
Bom Conselho	Brazil	Record daily precipitation	27.6 mm (1.1 in)	52 of 100 (Notable)
Acude Riacho Do Sangue	Brazil	Record daily precipitation	37.5 mm (1.5 in)	51 of 100 (Notable)
Pavillion	United States	Record daily precipitation	39.9 mm (1.6 in)	51 of 100 (Notable)
Issik	Kazakhstan	Record daily precipitation	36.0 mm (1.4 in)	50 of 100 (Notable)
Tennyson	United States	Record daily precipitation	71.4 mm (2.8 in)	50 of 100 (Notable)
Wheatland 4N	United States	Record daily precipitation	68.8 mm (2.7 in)	50 of 100 (Notable)
Kauffman 4 SSE	United States	Record daily precipitation	37.1 mm (1.5 in)	49 of 100 (Notable)
Peppermint Grove	Australia	Record daily precipitation	45.7 mm (1.8 in)	47 of 100 (Notable)
El Rito	United States	Record daily precipitation	25.4 mm (1.0 in)	47 of 100 (Notable)
Leo 6 SW	United States	Record daily precipitation	38.4 mm (1.5 in)	47 of 100 (Notable)
Yoder 5 W	United States	Record daily precipitation	57.4 mm (2.3 in)	46 of 100 (Notable)
Lagoa da Canoa	Brazil	Record daily precipitation	32.2 mm (1.3 in)	45 of 100 (Notable)
Bikin	Russia	Record daily precipitation	52.3 mm (2.1 in)	44 of 100 (Notable)
Novomirgorod	Ukraine	Record daily precipitation	35.6 mm (1.4 in)	44 of 100 (Notable)
Mossman Central Mill	Australia	Record daily precipitation	46.2 mm (1.8 in)	43 of 100 (Notable)
South Johnstone Exp STN	Australia	Record daily precipitation	49.8 mm (2.0 in)	42 of 100 (Notable)
Tobias Barreto	Brazil	Record daily precipitation	25.0 mm (1.0 in)	42 of 100 (Notable)
Condamine Plains	Australia	Record daily precipitation	43.4 mm (1.7 in)	41 of 100 (Notable)
Palisade	United States	Record daily precipitation	70.1 mm (2.8 in)	41 of 100 (Notable)
Itaporanga (Misericordia)	Brazil	Record daily precipitation	25.4 mm (1.0 in)	40 of 100 (Notable)
Rangely 1E	United States	Record low maximum temperature	18.3 C (64.9 F)	40 of 100 (Notable)
Green Rvr	United States	Record daily precipitation	38.1 mm (1.5 in)	40 of 100 (Notable)
Mossman Post Office	Australia	Record daily precipitation	44.2 mm (1.7 in)	39 of 100 (Notable)
Drake (Village Resource Centre	Australia	Record daily precipitation	33.5 mm (1.3 in)	39 of 100 (Notable)
Archer	United States	Record daily precipitation	39.9 mm (1.6 in)	39 of 100 (Notable)
Ft Laramie 11 NNW	United States	Record daily precipitation	53.8 mm (2.1 in)	39 of 100 (Notable)
Riverton	United States	Record daily precipitation	29.5 mm (1.2 in)	38 of 100 (Notable)
C.A.E. Llera	Mexico	Record low minimum temperature	12.8 C (55.0 F)	37 of 100 (Notable)
Port Gibson 1 NE	United States	Record daily precipitation	47.0 mm (1.9 in)	37 of 100 (Notable)
Wallace 2W	United States	Record daily precipitation	47.5 mm (1.9 in)	37 of 100 (Notable)
Hecla	United States	Record daily precipitation	32.5 mm (1.3 in)	37 of 100 (Notable)
Midwest	United States	Record daily precipitation	25.4 mm (1.0 in)	37 of 100 (Notable)
Fairview	Canada	Record daily precipitation	37.3 mm (1.5 in)	36 of 100 (Notable)
Mungindi (Wongwie)	Australia	Record daily precipitation	30.5 mm (1.2 in)	35 of 100 (Notable)
Arhangelsk	Russia	Record low maximum temperature	6.7 C (44.1 F)	35 of 100 (Notable)
Espanola	United States	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Espirito Santo	Brazil	Record daily precipitation	34.2 mm (1.3 in)	34 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record low maximum temperature	6.3 C (43.3 F)	34 of 100 (Routine)
Arthur	United States	Record daily precipitation	39.9 mm (1.6 in)	34 of 100 (Routine)
Carmendale	Australia	Record daily precipitation	34.8 mm (1.4 in)	33 of 100 (Routine)
Crescent Lake Nwr	United States	Record daily precipitation	72.4 mm (2.9 in)	33 of 100 (Routine)

Counts by Type and Timescale

612 records

Records set or tied on 11 September 1973 by type: Highest daily maximum 63, Lowest daily maximum 90, Highest daily minimum 78, Lowest daily minimum 48, Heaviest daily rainfall 330, Deepest snow cover 3.

Records on 11 September 1973 by type
Record type	Records
Highest daily maximum	63
Lowest daily maximum	90
Highest daily minimum	78
Lowest daily minimum	48
Heaviest daily rainfall	330
Heaviest daily snowfall	0
Deepest snow cover	3

Records on 11 September 1973 by timescale: all-time 1, monthly 26, daily 585.

How Much Records Were Beaten By

511 broken records

Margins by which the 511 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 99.8. Ties are not counted.

Top 20 by Significance

11 September 1973

Top 20 records on 11 September 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 September 1973	Musgrave, AU	monthly rain	76.2 mm (3.0 in)	49.0 mm (1.9 in)	62 years	76 of 100 (Major)
11 September 1973	Sao Miguel Dos Campos, BR	monthly rain	99.8 mm (3.9 in)	31.0 mm (1.2 in)	47 years	69 of 100 (Major)
11 September 1973	Torrington Exp Farm, US	monthly rain	69.3 mm (2.7 in)	28.7 mm (1.1 in)	42 years	67 of 100 (Major)
11 September 1973	Danevang 1 W, US	daily rain	131.6 mm (5.2 in)	99.8 mm (3.9 in)	60 years	65 of 100 (Major)
11 September 1973	Senador Pompeu, BR	daily rain	68.6 mm (2.7 in)	68.6 mm (2.7 in)	62 years	64 of 100 (Major)
11 September 1973	Sertania (Alagoa de Baixo), BR	daily rain	52.0 mm (2.0 in)	52.0 mm (2.0 in)	62 years	64 of 100 (Major)
11 September 1973	Alliance 1WNW, US	daily rain	48.3 mm (1.9 in)	36.1 mm (1.4 in)	54 years	64 of 100 (Major)
11 September 1973	Princesa Isabel, BR	daily rain	30.2 mm (1.2 in)	29.2 mm (1.1 in)	55 years	62 of 100 (Major)
11 September 1973	Acude Nova Floresta, BR	daily rain	49.3 mm (1.9 in)	49.3 mm (1.9 in)	52 years	60 of 100 (Major)
11 September 1973	Junqueiro, BR	monthly rain	85.5 mm (3.4 in)	38.9 mm (1.5 in)	14 years	60 of 100 (Major)
11 September 1973	Porto Real Do Colegio, BR	daily rain	48.0 mm (1.9 in)	26.0 mm (1.0 in)	55 years	59 of 100 (Notable)
11 September 1973	Cooktown Post Office, AU	daily rain	34.5 mm (1.4 in)	25.6 mm (1.0 in)	31 years	58 of 100 (Notable)
11 September 1973	Rock Springs, US	monthly rain	51.3 mm (2.0 in)	20.6 mm (0.8 in)	0 years	57 of 100 (Notable)
11 September 1973	Mineirolandia, BR	daily rain	75.1 mm (3.0 in)	75.1 mm (3.0 in)	40 years	56 of 100 (Notable)
11 September 1973	Feiticeiro, BR	daily rain	49.8 mm (2.0 in)	49.8 mm (2.0 in)	40 years	56 of 100 (Notable)
11 September 1973	Sao Luiz Do Quitunde, BR	monthly rain	120.0 mm (4.7 in)	44.5 mm (1.8 in)	13 years	55 of 100 (Notable)
11 September 1973	Algazy Ostrov, KZ	all-time rain	35.9 mm (1.4 in)	5.7 mm (0.22 in)	11 years	54 of 100 (Notable)
11 September 1973	Chugwater, US	daily rain	63.5 mm (2.5 in)	45.0 mm (1.8 in)	26 years	54 of 100 (Notable)
11 September 1973	Poco Das Trincheiras, BR	daily rain	42.6 mm (1.7 in)	32.2 mm (1.3 in)	34 years	53 of 100 (Notable)
11 September 1973	Bom Conselho, BR	daily rain	27.6 mm (1.1 in)	23.3 mm (0.9 in)	27 years	52 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

1809 to 1973

Records set or tied on this calendar date in each year from 1809 to 1973. 1973 had 612 records.

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

Records on 09-11 in each year
Year	Records
1809	1
1814	3
1818	1
1830	1
1836	1
1838	3
1839	1
1848	1
1850	1
1851	1
1854	2
1858	1
1860	2
1861	1
1863	2
1865	3
1866	1
1874	2
1876	1
1877	1
1879	1
1880	1
1882	4
1883	2
1884	1
1886	1
1888	2
1889	4
1890	2
1891	2
1892	1
1893	4
1894	2
1895	4
1896	1
1897	3
1898	3
1899	5
1900	1
1901	3
1902	15
1903	13
1904	4
1905	5
1906	10
1907	9
1908	20
1909	12
1910	19
1911	9
1912	25
1913	22
1914	52
1915	160
1916	17
1917	88
1918	62
1919	52
1920	158
1921	52
1922	78
1923	44
1924	290
1925	260
1926	137
1927	300
1928	127
1929	206
1930	136
1931	868
1932	210
1933	276
1934	144
1935	410
1936	567
1937	324
1938	288
1939	561
1940	891
1941	210
1942	234
1943	335
1944	446
1945	341
1946	262
1947	611
1948	424
1949	450
1950	462
1951	247
1952	549
1953	392
1954	363
1955	479
1956	539
1957	470
1958	748
1959	488
1960	423
1961	524
1962	480
1963	359
1964	1,195
1965	414
1966	392
1967	478
1968	835
1969	685
1970	474
1971	464
1972	507
1973	612
1974	430
1975	644
1976	920
1977	406
1978	911
1979	596
1980	474
1981	347
1982	862
1983	1,243
1984	888
1985	844
1986	1,221
1987	595
1988	1,019
1989	1,301
1990	840
1991	843
1992	672
1993	809
1994	713
1995	619
1996	1,030
1997	808
1998	1,821
1999	1,073
2000	1,469
2001	826
2002	1,059
2003	1,022
2004	740
2005	1,163
2006	1,132
2007	947
2008	916
2009	774
2010	965
2011	1,051
2012	687
2013	1,207
2014	1,100
2015	683
2016	677
2017	916
2018	763
2019	806
2020	1,235
2021	851
2022	617
2023	1,034
2024	889
2025	917
2026	615

Download the Data

Data for records on 1973-09-11: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	465
20 to 40	33
40 to 60	7
60 to 80	5
80 to 100	1