Weather Records on 17 September 1943

513 weather records were set or tied worldwide on 17 September 1943. Highest significance: Lake Arthur 7 SW, US.

Key Facts for 17 September 1943

On 17 September 1943, 513 weather records were set or tied at long-record stations worldwide.
108 were record highs and 265 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 8 monthly and 505 daily.
Lake Arthur 7 SW set a daily record precipitation of 172.2 mm (6.8 in) on 17 September 1943.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 422 records.

Record Map

513 stations

513 station records on 17 September 1943 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 1943: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lake Arthur 7 SW	United States	Record daily precipitation	172.2 mm (6.8 in)	52 of 100 (Notable)
Swansea Post Office	Australia	Record daily precipitation	35.6 mm (1.4 in)	51 of 100 (Notable)
Mohpani	India	Record daily precipitation	170.2 mm (6.7 in)	51 of 100 (Notable)
Cinclare	United States	Record daily precipitation	96.5 mm (3.8 in)	49 of 100 (Notable)
Kurud	India	Record daily precipitation	106.7 mm (4.2 in)	45 of 100 (Notable)
Jennings	United States	Record daily precipitation	119.4 mm (4.7 in)	45 of 100 (Notable)
Milan	Italy	Record high minimum temperature	20.8 C (69.4 F)	41 of 100 (Notable)
Collingrove	Australia	Record daily precipitation	47.2 mm (1.9 in)	40 of 100 (Notable)
Raipur	India	Record daily precipitation	96.5 mm (3.8 in)	40 of 100 (Notable)
Ambagarh Chowki	India	Record daily precipitation	100.6 mm (4.0 in)	39 of 100 (Notable)
Dullabcherra	India	Record daily precipitation	91.7 mm (3.6 in)	35 of 100 (Notable)
Lafayette Rgnl AP	United States	Record low maximum temperature	20.0 C (68.0 F)	35 of 100 (Notable)
Bool Lagoon	Australia	Record daily precipitation	26.4 mm (1.0 in)	34 of 100 (Routine)
Paradis 7 S	United States	Record daily precipitation	78.0 mm (3.1 in)	34 of 100 (Routine)
Lyndoch (Pewsey Vale)	Australia	Record daily precipitation	41.9 mm (1.6 in)	32 of 100 (Routine)
Donaldsonville 4 SW	United States	Record low maximum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Biddelia	Australia	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Burnie (No 1)	Australia	Record daily precipitation	34.3 mm (1.4 in)	30 of 100 (Routine)
Cinclare	United States	Record low maximum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Lafayette Rgnl AP	United States	Record daily precipitation	111.3 mm (4.4 in)	30 of 100 (Routine)
Peterborough	Canada	Record low maximum temperature	11.7 C (53.1 F)	29 of 100 (Routine)
Cheneyville 1 NE	United States	Record low maximum temperature	20.0 C (68.0 F)	29 of 100 (Routine)
Melville	United States	Record low maximum temperature	20.0 C (68.0 F)	29 of 100 (Routine)
Uvalde	United States	Record daily precipitation	55.1 mm (2.2 in)	29 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	11.1 C (52.0 F)	28 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	14.4 C (57.9 F)	28 of 100 (Routine)
Saoner	India	Record daily precipitation	89.7 mm (3.5 in)	28 of 100 (Routine)
Mackay Lost Rvr Rs	United States	Record high minimum temperature	14.4 C (57.9 F)	27 of 100 (Routine)
Stewart	Canada	Record low minimum temperature	-3.9 C (25.0 F)	26 of 100 (Routine)
Liberty	United States	Record low maximum temperature	20.6 C (69.1 F)	26 of 100 (Routine)
Collingwood	Canada	Record low maximum temperature	12.8 C (55.0 F)	25 of 100 (Routine)
Fogo	Canada	Record daily precipitation	26.4 mm (1.0 in)	25 of 100 (Routine)
Shujalpur	India	Record daily precipitation	40.6 mm (1.6 in)	25 of 100 (Routine)
Pathankot	India	Record daily precipitation	61.5 mm (2.4 in)	25 of 100 (Routine)
Houston Wb City	United States	Record low maximum temperature	20.6 C (69.1 F)	25 of 100 (Routine)
Lundbreck	Canada	Record daily snowfall	7.6 cm (3.0 in)	24 of 100 (Routine)
Lakefield	Canada	Record low maximum temperature	11.7 C (53.1 F)	24 of 100 (Routine)
Karesuando	Sweden	Record high minimum temperature	8.8 C (47.8 F)	24 of 100 (Routine)
Jennings	United States	Record low maximum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
Cascade 5 S	United States	Record high minimum temperature	17.8 C (64.0 F)	24 of 100 (Routine)
Espanola	United States	Record high minimum temperature	16.7 C (62.1 F)	24 of 100 (Routine)
Blanco	United States	Record daily precipitation	47.2 mm (1.9 in)	24 of 100 (Routine)
Haliburton A	Canada	Record low maximum temperature	10.0 C (50.0 F)	23 of 100 (Routine)
Sri Ranbirsingh	India	Record daily precipitation	33.0 mm (1.3 in)	23 of 100 (Routine)
Pindron	India	Record daily precipitation	114.3 mm (4.5 in)	23 of 100 (Routine)
Nord-Rana	Norway	Record daily precipitation	29.4 mm (1.2 in)	23 of 100 (Routine)
Clifton	United States	Record low minimum temperature	12.8 C (55.0 F)	23 of 100 (Routine)
Portland Rfc City	United States	Record high minimum temperature	16.1 C (61.0 F)	23 of 100 (Routine)
Launceston (Pumping Station)	Australia	Record low maximum temperature	10.3 C (50.5 F)	22 of 100 (Routine)
Krakmo	Norway	Record daily precipitation	38.3 mm (1.5 in)	22 of 100 (Routine)
Vajda-Guba	Russia	Record high minimum temperature	10.0 C (50.0 F)	22 of 100 (Routine)
Hammond	United States	Record low maximum temperature	21.7 C (71.1 F)	22 of 100 (Routine)
Pearlington	United States	Record low maximum temperature	23.3 C (73.9 F)	22 of 100 (Routine)
Rogersville 1 NE	United States	Record low minimum temperature	5.0 C (41.0 F)	22 of 100 (Routine)
Angleton 2 W	United States	Record low maximum temperature	22.2 C (72.0 F)	22 of 100 (Routine)
Spooner Ag Rsch STN	United States	Record low minimum temperature	-3.9 C (25.0 F)	22 of 100 (Routine)
Lucknow	Canada	Record low minimum temperature	0.6 C (33.1 F)	21 of 100 (Routine)
Marion 2 N	United States	Record low maximum temperature	15.6 C (60.1 F)	21 of 100 (Routine)
Magnolia	United States	Record low maximum temperature	22.2 C (72.0 F)	21 of 100 (Routine)
Choteau	United States	Record high minimum temperature	10.0 C (50.0 F)	21 of 100 (Routine)

Counts by Type and Timescale

513 records

Records set or tied on 17 September 1943 by type: Highest daily maximum 38, Lowest daily maximum 149, Highest daily minimum 70, Lowest daily minimum 116, Heaviest daily rainfall 137, Heaviest daily snowfall 3.

Records on 17 September 1943 by type
Record type	Records
Highest daily maximum	38
Lowest daily maximum	149
Highest daily minimum	70
Lowest daily minimum	116
Heaviest daily rainfall	137
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 17 September 1943 by timescale: all-time 0, monthly 8, daily 505.

How Much Records Were Beaten By

377 broken records

Margins by which the 377 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 144.3. Ties are not counted.

Top 20 by Significance

17 September 1943

Top 20 records on 17 September 1943 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1943	Lake Arthur 7 SW, US	daily rain	172.2 mm (6.8 in)	144.3 mm (5.7 in)	29 years	52 of 100 (Notable)
17 September 1943	Swansea Post Office, AU	daily rain	35.6 mm (1.4 in)	25.2 mm (1.0 in)	22 years	51 of 100 (Notable)
17 September 1943	Mohpani, IN	daily rain	170.2 mm (6.7 in)	125.7 mm (4.9 in)	25 years	51 of 100 (Notable)
17 September 1943	Cinclare, US	daily rain	96.5 mm (3.8 in)	64.7 mm (2.5 in)	29 years	49 of 100 (Notable)
17 September 1943	Kurud, IN	daily rain	106.7 mm (4.2 in)	72.4 mm (2.9 in)	18 years	45 of 100 (Notable)
17 September 1943	Jennings, US	daily rain	119.4 mm (4.7 in)	65.6 mm (2.6 in)	36 years	45 of 100 (Notable)
17 September 1943	Milan, IT	daily high min	20.8 C (69.4 F)	0.4 C (0.7 F)	137 years	41 of 100 (Notable)
17 September 1943	Collingrove, AU	daily rain	47.2 mm (1.9 in)	16.5 mm (0.6 in)	40 years	40 of 100 (Notable)
17 September 1943	Raipur, IN	daily rain	96.5 mm (3.8 in)	49.8 mm (2.0 in)	40 years	40 of 100 (Notable)
17 September 1943	Ambagarh Chowki, IN	daily rain	100.6 mm (4.0 in)	81.5 mm (3.2 in)	6 years	39 of 100 (Notable)
17 September 1943	Dullabcherra, IN	daily rain	91.7 mm (3.6 in)	49.8 mm (2.0 in)	21 years	35 of 100 (Notable)
17 September 1943	Lafayette Rgnl AP, US	daily low max	20.0 C (68.0 F)	5.6 C (10.1 F)	41 years	35 of 100 (Notable)
17 September 1943	Bool Lagoon, AU	daily rain	26.4 mm (1.0 in)	12.2 mm (0.5 in)	30 years	34 of 100 (Routine)
17 September 1943	Paradis 7 S, US	daily rain	78.0 mm (3.1 in)	52.6 mm (2.1 in)	29 years	34 of 100 (Routine)
17 September 1943	Lyndoch (Pewsey Vale), AU	daily rain	41.9 mm (1.6 in)	16.5 mm (0.6 in)	17 years	32 of 100 (Routine)
17 September 1943	Donaldsonville 4 SW, US	daily low max	21.1 C (70.0 F)	4.5 C (8.1 F)	41 years	32 of 100 (Routine)
17 September 1943	Biddelia, AU	daily rain	50.8 mm (2.0 in)	25.4 mm (1.0 in)	12 years	31 of 100 (Routine)
17 September 1943	Burnie (No 1), AU	daily rain	34.3 mm (1.4 in)	13.7 mm (0.5 in)	21 years	30 of 100 (Routine)
17 September 1943	Cinclare, US	daily low max	21.1 C (70.0 F)	6.1 C (11.0 F)	12 years	30 of 100 (Routine)
17 September 1943	Lafayette Rgnl AP, US	daily rain	111.3 mm (4.4 in)	34.1 mm (1.3 in)	20 years	30 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

1796 to 1943

Records set or tied on this calendar date in each year from 1796 to 1943. 1943 had 513 records.

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

Records on 09-17 in each year
Year	Records
1796	1
1797	1
1805	1
1833	1
1834	1
1837	2
1845	1
1847	3
1848	1
1850	1
1851	2
1853	2
1854	2
1859	1
1862	1
1867	1
1870	1
1871	1
1872	1
1873	1
1874	1
1875	1
1877	1
1881	1
1882	2
1884	3
1885	3
1886	6
1888	2
1889	8
1891	1
1893	3
1894	1
1895	4
1896	9
1897	4
1898	7
1899	1
1900	4
1901	5
1902	5
1903	28
1904	2
1905	17
1906	10
1907	15
1908	13
1909	7
1910	38
1911	15
1912	17
1913	28
1914	38
1915	48
1916	40
1917	255
1918	41
1919	21
1920	40
1921	66
1922	47
1923	159
1924	80
1925	338
1926	154
1927	420
1928	78
1929	168
1930	147
1931	564
1932	425
1933	415
1934	246
1935	321
1936	219
1937	463
1938	363
1939	294
1940	326
1941	328
1942	581
1943	513
1944	403
1945	614
1946	620
1947	680
1948	630
1949	292
1950	412
1951	359
1952	263
1953	344
1954	449
1955	649
1956	437
1957	405
1958	806
1959	1,210
1960	385
1961	657
1962	432
1963	297
1964	559
1965	1,394
1966	523
1967	331
1968	691
1969	352
1970	412
1971	898
1972	556
1973	638
1974	491
1975	478
1976	636
1977	641
1978	764
1979	804
1980	794
1981	1,155
1982	606
1983	862
1984	1,006
1985	448
1986	1,314
1987	926
1988	982
1989	863
1990	650
1991	1,407
1992	686
1993	950
1994	986
1995	1,145
1996	1,342
1997	1,057
1998	1,137
1999	1,102
2000	1,318
2001	895
2002	1,025
2003	586
2004	872
2005	1,042
2006	1,344
2007	752
2008	886
2009	871
2010	907
2011	1,116
2012	597
2013	1,253
2014	571
2015	953
2016	707
2017	455
2018	899
2019	774
2020	651
2021	345
2022	313
2023	646
2024	954
2025	634
2026	968

Download the Data

Data for records on 1943-09-17: 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	347
20 to 40	16
40 to 60	7
60 to 80	4
80 to 100	1
100 to 120	0
120 to 140	1
140 to 160	1