Weather Records on 17 September 2023

646 weather records were set or tied worldwide on 17 September 2023. Highest significance: Indore, IN.

Key Facts for 17 September 2023

On 17 September 2023, 646 weather records were set or tied at long-record stations worldwide.
529 were record highs and 30 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 13 monthly and 632 daily.
Indore set a daily record precipitation of 145.0 mm (5.7 in) on 17 September 2023.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 421 records.

Record Map

646 stations

646 station records on 17 September 2023 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 2023: highest significance records shown on the map
Station	Country	Type	Value	Significance
Indore	India	Record daily precipitation	145.0 mm (5.7 in)	59 of 100 (Notable)
Nottingham: Watnall	United Kingdom	Record daily precipitation	33.0 mm (1.3 in)	58 of 100 (Notable)
Hurn	United Kingdom	Record daily precipitation	35.0 mm (1.4 in)	54 of 100 (Notable)
Hayling Island	United Kingdom	Record daily precipitation	38.2 mm (1.5 in)	54 of 100 (Notable)
High Mowthorpe	United Kingdom	Record daily precipitation	45.2 mm (1.8 in)	52 of 100 (Notable)
Oxford	United Kingdom	Record daily precipitation	31.5 mm (1.2 in)	50 of 100 (Notable)
Kapingamarangi	Federated States of Micronesia	Record daily precipitation	132.1 mm (5.2 in)	48 of 100 (Notable)
Haines AP	United States	Record daily precipitation	44.5 mm (1.8 in)	47 of 100 (Notable)
Kingsville	United States	Record daily precipitation	83.8 mm (3.3 in)	46 of 100 (Notable)
Plant City	United States	Record high maximum temperature	36.7 C (98.1 F)	45 of 100 (Notable)
Watsonville Wtr Wks	United States	Record high minimum temperature	15.6 C (60.1 F)	44 of 100 (Notable)
Landsburg	United States	Record high minimum temperature	14.4 C (57.9 F)	44 of 100 (Notable)
Ashland	United States	Record high maximum temperature	35.6 C (96.1 F)	43 of 100 (Notable)
Elkins- Randolph Co AP	United States	Record daily precipitation	47.8 mm (1.9 in)	43 of 100 (Notable)
Canjilon R/S	United States	Record daily precipitation	26.9 mm (1.1 in)	42 of 100 (Notable)
Coleman	United States	Record daily precipitation	81.3 mm (3.2 in)	42 of 100 (Notable)
Nagasaki	Japan	Record daily precipitation	110.0 mm (4.3 in)	41 of 100 (Notable)
Burnet	United States	Record daily precipitation	33.8 mm (1.3 in)	40 of 100 (Notable)
Valley	United Kingdom	Record daily precipitation	25.0 mm (1.0 in)	39 of 100 (Notable)
Lugo/Rozas	Spain	Record daily precipitation	32.8 mm (1.3 in)	38 of 100 (Notable)
Adelaide West Terrace	Australia	Record high maximum temperature	30.8 C (87.4 F)	37 of 100 (Notable)
Ellensburg Bowers Fld	United States	Record high minimum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Hagerstown 1E	United States	Record low maximum temperature	15.6 C (60.1 F)	35 of 100 (Notable)
Walker	United States	Record low maximum temperature	6.7 C (44.1 F)	35 of 100 (Notable)
Chiang Rai	Thailand	Record daily precipitation	83.3 mm (3.3 in)	34 of 100 (Routine)
Rome	United States	Record low maximum temperature	20.0 C (68.0 F)	34 of 100 (Routine)
Onahama	Japan	Record high minimum temperature	25.1 C (77.2 F)	33 of 100 (Routine)
Halmstad Flygflottilj	Sweden	Record high maximum temperature	23.2 C (73.8 F)	33 of 100 (Routine)
Dandong	China	Record high maximum temperature	29.8 C (85.6 F)	32 of 100 (Routine)
Strasbourg-Entzheim	France	Record high maximum temperature	31.5 C (88.7 F)	32 of 100 (Routine)
Tg Jiu	Romania	Record high minimum temperature	18.0 C (64.4 F)	32 of 100 (Routine)
Spokane Intl AP	United States	Record high minimum temperature	15.6 C (60.1 F)	32 of 100 (Routine)
Berberati	Central African Republic	Record low maximum temperature	25.4 C (77.7 F)	31 of 100 (Routine)
Bordeaux-Merignac	France	Record high minimum temperature	19.9 C (67.8 F)	31 of 100 (Routine)
Rye Patch Dam	United States	Record high minimum temperature	15.0 C (59.0 F)	31 of 100 (Routine)
Ceduna AMO	Australia	Record high maximum temperature	39.8 C (103.6 F)	30 of 100 (Routine)
Montague Island Lighthouse	Australia	Record high minimum temperature	16.8 C (62.2 F)	30 of 100 (Routine)
Arkona	Germany	Record high minimum temperature	16.5 C (61.7 F)	30 of 100 (Routine)
Cordoba Aeropuerto	Spain	Record low maximum temperature	21.5 C (70.7 F)	30 of 100 (Routine)
Harlingen	United States	Record high maximum temperature	38.3 C (100.9 F)	30 of 100 (Routine)
Toulouse-Blagnac	France	Record high minimum temperature	22.1 C (71.8 F)	29 of 100 (Routine)
Stuttgart-Schnarrenberg	Germany	Record high minimum temperature	17.6 C (63.7 F)	29 of 100 (Routine)
Koln-Bonn	Germany	Record high minimum temperature	18.2 C (64.8 F)	29 of 100 (Routine)
Oshima	Japan	Record high minimum temperature	25.9 C (78.6 F)	29 of 100 (Routine)
Hiddensee-Vitte	Germany	Record high maximum temperature	24.6 C (76.3 F)	28 of 100 (Routine)
Muroran	Japan	Record high maximum temperature	25.9 C (78.6 F)	28 of 100 (Routine)
Utsunomiya	Japan	Record high minimum temperature	24.3 C (75.7 F)	28 of 100 (Routine)
Tsuruga	Japan	Record high minimum temperature	26.0 C (78.8 F)	28 of 100 (Routine)
Mt Adams Rs	United States	Record high minimum temperature	15.0 C (59.0 F)	28 of 100 (Routine)
Heinsberg-Schleiden	Germany	Record high minimum temperature	18.5 C (65.3 F)	27 of 100 (Routine)
Neukirchen-Hauptschwenda	Germany	Record high minimum temperature	17.5 C (63.5 F)	27 of 100 (Routine)
Hiroo	Japan	Record high minimum temperature	19.1 C (66.4 F)	27 of 100 (Routine)
Irako	Japan	Record high minimum temperature	25.5 C (77.9 F)	27 of 100 (Routine)
Tsuyama	Japan	Record high minimum temperature	24.0 C (75.2 F)	27 of 100 (Routine)
Sinuiju	Korea, North	Record high minimum temperature	19.9 C (67.8 F)	27 of 100 (Routine)
Nalut	Libya	Record high minimum temperature	25.3 C (77.5 F)	27 of 100 (Routine)
Rodrigues	Mauritius	Record high minimum temperature	21.8 C (71.2 F)	27 of 100 (Routine)
Okecie	Poland	Record high maximum temperature	26.2 C (79.2 F)	27 of 100 (Routine)
Galva	United States	Record daily precipitation	39.9 mm (1.6 in)	27 of 100 (Routine)
Gaoua	Burkina Faso	Record low maximum temperature	25.7 C (78.3 F)	27 of 100 (Routine)

Counts by Type and Timescale

646 records

Records set or tied on 17 September 2023 by type: Highest daily maximum 240, Lowest daily maximum 22, Highest daily minimum 289, Lowest daily minimum 8, Heaviest daily rainfall 87.

Records on 17 September 2023 by type
Record type	Records
Highest daily maximum	240
Lowest daily maximum	22
Highest daily minimum	289
Lowest daily minimum	8
Heaviest daily rainfall	87
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 September 2023 by timescale: all-time 1, monthly 13, daily 632.

How Much Records Were Beaten By

553 broken records

Margins by which the 553 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 82.6. Ties are not counted.

Top 20 by Significance

17 September 2023

Top 20 records on 17 September 2023 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 2023	Indore, IN	daily rain	145.0 mm (5.7 in)	60.9 mm (2.4 in)	72 years	59 of 100 (Notable)
17 September 2023	Nottingham: Watnall, GB	daily rain	33.0 mm (1.3 in)	20.9 mm (0.8 in)	57 years	58 of 100 (Notable)
17 September 2023	Hurn, GB	daily rain	35.0 mm (1.4 in)	24.0 mm (0.9 in)	46 years	54 of 100 (Notable)
17 September 2023	Hayling Island, GB	daily rain	38.2 mm (1.5 in)	22.5 mm (0.9 in)	56 years	54 of 100 (Notable)
17 September 2023	High Mowthorpe, GB	daily rain	45.2 mm (1.8 in)	19.0 mm (0.7 in)	53 years	52 of 100 (Notable)
17 September 2023	Oxford, GB	daily rain	31.5 mm (1.2 in)	6.5 mm (0.26 in)	113 years	50 of 100 (Notable)
17 September 2023	Kapingamarangi, FM	daily rain	132.1 mm (5.2 in)	82.6 mm (3.3 in)	8 years	48 of 100 (Notable)
17 September 2023	Haines AP, US	daily rain	44.5 mm (1.8 in)	16.1 mm (0.6 in)	84 years	47 of 100 (Notable)
17 September 2023	Kingsville, US	daily rain	83.8 mm (3.3 in)	13.9 mm (0.5 in)	100 years	46 of 100 (Notable)
17 September 2023	Plant City, US	daily high max	36.7 C (98.1 F)	1.1 C (2.0 F)	129 years	45 of 100 (Notable)
17 September 2023	Watsonville Wtr Wks, US	daily high min	15.6 C (60.1 F)	1.2 C (2.2 F)	104 years	44 of 100 (Notable)
17 September 2023	Landsburg, US	daily high min	14.4 C (57.9 F)	1.6 C (2.9 F)	104 years	44 of 100 (Notable)
17 September 2023	Ashland, US	daily high max	35.6 C (96.1 F)	1.7 C (3.1 F)	125 years	43 of 100 (Notable)
17 September 2023	Elkins- Randolph Co AP, US	daily rain	47.8 mm (1.9 in)	11.7 mm (0.5 in)	77 years	43 of 100 (Notable)
17 September 2023	Canjilon R/S, US	daily rain	26.9 mm (1.1 in)	8.1 mm (0.32 in)	76 years	42 of 100 (Notable)
17 September 2023	Coleman, US	daily rain	81.3 mm (3.2 in)	12.7 mm (0.5 in)	86 years	42 of 100 (Notable)
17 September 2023	Nagasaki, JP	daily rain	110.0 mm (4.3 in)	39.7 mm (1.6 in)	69 years	41 of 100 (Notable)
17 September 2023	Burnet, US	daily rain	33.8 mm (1.3 in)	0.3 mm (0.01 in)	120 years	40 of 100 (Notable)
17 September 2023	Valley, GB	daily rain	25.0 mm (1.0 in)	12.8 mm (0.5 in)	49 years	39 of 100 (Notable)
17 September 2023	Lugo/Rozas, ES	daily rain	32.8 mm (1.3 in)	9.4 mm (0.37 in)	69 years	38 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

1796 to 2023

Records set or tied on this calendar date in each year from 1796 to 2023. 2023 had 646 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 2023-09-17: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	546
20 to 40	5
40 to 60	0
60 to 80	1
80 to 100	1