Weather Records on 17 September 2017

455 weather records were set or tied worldwide on 17 September 2017. Highest significance: Maksimovo, RU.

Key Facts for 17 September 2017

On 17 September 2017, 455 weather records were set or tied at long-record stations worldwide.
253 were record highs and 95 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 444 daily.
Maksimovo set a daily record precipitation of 28.2 mm (1.1 in) on 17 September 2017.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 423 records.

Record Map

455 stations

455 station records on 17 September 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Maksimovo	Russia	Record daily precipitation	28.2 mm (1.1 in)	60 of 100 (Major)
Fossil	United States	Record daily precipitation	33.0 mm (1.3 in)	58 of 100 (Notable)
Hachijojima	Japan	Record daily precipitation	193.0 mm (7.6 in)	56 of 100 (Notable)
Chanute Martin Johnson AP	United States	Record daily precipitation	65.0 mm (2.6 in)	54 of 100 (Notable)
Tooma	Estonia	Record daily precipitation	28.8 mm (1.1 in)	53 of 100 (Notable)
Medicine Lake 3 SE	United States	Record daily precipitation	26.7 mm (1.1 in)	51 of 100 (Notable)
Nes (Ameland)	Netherlands	Record daily precipitation	38.0 mm (1.5 in)	50 of 100 (Notable)
Kenmare 1 WSW	United States	Record daily precipitation	43.2 mm (1.7 in)	46 of 100 (Notable)
Moe Gippsland Water	Australia	Record daily precipitation	31.2 mm (1.2 in)	45 of 100 (Notable)
Key West NAS	United States	Record high maximum temperature	38.9 C (102.0 F)	45 of 100 (Notable)
Detour Village	United States	Record high minimum temperature	17.2 C (63.0 F)	43 of 100 (Notable)
Harrisonville	United States	Record daily precipitation	48.0 mm (1.9 in)	43 of 100 (Notable)
Stuttgart 9 ESE	United States	Record high minimum temperature	26.7 C (80.1 F)	42 of 100 (Notable)
Charlevoix	United States	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Jogeva	Estonia	Record daily precipitation	26.9 mm (1.1 in)	41 of 100 (Notable)
Valga	Estonia	Record daily precipitation	32.7 mm (1.3 in)	41 of 100 (Notable)
Osawatomie	United States	Record daily precipitation	68.6 mm (2.7 in)	41 of 100 (Notable)
Tonganoxie 5SE	United States	Record daily precipitation	70.6 mm (2.8 in)	41 of 100 (Notable)
Asosan	Japan	Record daily precipitation	146.1 mm (5.8 in)	40 of 100 (Notable)
Uman	Ukraine	Record high maximum temperature	30.9 C (87.6 F)	40 of 100 (Notable)
Anaconda	United States	Record low maximum temperature	8.3 C (46.9 F)	40 of 100 (Notable)
Hamada	Japan	Record daily precipitation	72.9 mm (2.9 in)	39 of 100 (Notable)
Oakland	United States	Record daily precipitation	37.3 mm (1.5 in)	39 of 100 (Notable)
Greenfield	United States	Record daily precipitation	72.1 mm (2.8 in)	38 of 100 (Notable)
Tatarsk	Russia	Record high maximum temperature	27.0 C (80.6 F)	37 of 100 (Notable)
Clinton Lake	United States	Record daily precipitation	69.6 mm (2.7 in)	37 of 100 (Notable)
Lecompton	United States	Record daily precipitation	54.1 mm (2.1 in)	37 of 100 (Notable)
Clifton	United States	Record daily precipitation	69.9 mm (2.8 in)	36 of 100 (Notable)
Hitoyoshi	Japan	Record daily precipitation	98.0 mm (3.9 in)	35 of 100 (Notable)
Ulricehamn	Sweden	Record daily precipitation	28.6 mm (1.1 in)	35 of 100 (Notable)
Tsuyama	Japan	Record daily precipitation	99.6 mm (3.9 in)	34 of 100 (Routine)
Minusinsk	Russia	Record high minimum temperature	13.0 C (55.4 F)	34 of 100 (Routine)
Vinnytsia	Ukraine	Record high maximum temperature	30.1 C (86.2 F)	34 of 100 (Routine)
Audubon	United States	Record daily precipitation	55.4 mm (2.2 in)	34 of 100 (Routine)
Moran	United States	Record daily precipitation	94.7 mm (3.7 in)	34 of 100 (Routine)
Ceduna Post Office	Australia	Record high maximum temperature	32.7 C (90.9 F)	33 of 100 (Routine)
Nellore	India	Record daily precipitation	67.1 mm (2.6 in)	33 of 100 (Routine)
Askaniia Nova	Ukraine	Record high maximum temperature	33.7 C (92.7 F)	33 of 100 (Routine)
Nobeoka	Japan	Record daily precipitation	205.0 mm (8.1 in)	32 of 100 (Routine)
Ottawa	United States	Record daily precipitation	53.6 mm (2.1 in)	32 of 100 (Routine)
Iron Mtn-Kingsford Wwtp	United States	Record high minimum temperature	17.8 C (64.0 F)	32 of 100 (Routine)
Zamboanga	Philippines	Record daily precipitation	34.8 mm (1.4 in)	31 of 100 (Routine)
Geneva #2	United States	Record daily precipitation	69.9 mm (2.8 in)	31 of 100 (Routine)
Emporia ASOS	United States	Record daily precipitation	40.9 mm (1.6 in)	31 of 100 (Routine)
Mount Gambier Post Office	Australia	Record low minimum temperature	0.3 C (32.5 F)	30 of 100 (Routine)
Port-Gentil	Gabon	Record high maximum temperature	31.0 C (87.8 F)	30 of 100 (Routine)
Zagreb-Gric	Croatia	Record daily precipitation	48.6 mm (1.9 in)	30 of 100 (Routine)
Mangalore/Bajpe	India	Record daily precipitation	59.7 mm (2.4 in)	30 of 100 (Routine)
Buynaksk	Russia	Record high minimum temperature	17.0 C (62.6 F)	30 of 100 (Routine)
Kerch	Ukraine	Record high maximum temperature	30.6 C (87.1 F)	30 of 100 (Routine)
Osceola	United States	Record daily precipitation	43.9 mm (1.7 in)	30 of 100 (Routine)
John Redmond Lake	United States	Record daily precipitation	38.1 mm (1.5 in)	30 of 100 (Routine)
Gaya	India	Record high maximum temperature	35.4 C (95.7 F)	29 of 100 (Routine)
Tadotsu	Japan	Record daily precipitation	114.0 mm (4.5 in)	29 of 100 (Routine)
Nouakchott	Mauritania	Record low maximum temperature	29.8 C (85.6 F)	29 of 100 (Routine)
Simferopol	Ukraine	Record high maximum temperature	35.1 C (95.2 F)	29 of 100 (Routine)
Lansing Capital City AP	United States	Record high maximum temperature	31.1 C (88.0 F)	29 of 100 (Routine)
Ogulin	Croatia	Record daily precipitation	61.0 mm (2.4 in)	28 of 100 (Routine)
Turgaj	Kazakhstan	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)
Lubny	Ukraine	Record high maximum temperature	29.5 C (85.1 F)	28 of 100 (Routine)

Counts by Type and Timescale

455 records

Records set or tied on 17 September 2017 by type: Highest daily maximum 127, Lowest daily maximum 30, Highest daily minimum 126, Lowest daily minimum 65, Heaviest daily rainfall 105, Deepest snow cover 2.

Records on 17 September 2017 by type
Record type	Records
Highest daily maximum	127
Lowest daily maximum	30
Highest daily minimum	126
Lowest daily minimum	65
Heaviest daily rainfall	105
Heaviest daily snowfall	0
Deepest snow cover	2

Records on 17 September 2017 by timescale: all-time 1, monthly 10, daily 444.

How Much Records Were Beaten By

378 broken records

Margins by which the 378 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 129.2. Ties are not counted.

Top 20 by Significance

17 September 2017

Top 20 records on 17 September 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 2017	Maksimovo, RU	daily rain	28.2 mm (1.1 in)	12.4 mm (0.5 in)	68 years	60 of 100 (Major)
17 September 2017	Fossil, US	monthly rain	33.0 mm (1.3 in)	7.3 mm (0.29 in)	89 years	58 of 100 (Notable)
17 September 2017	Hachijojima, JP	daily rain	193.0 mm (7.6 in)	129.2 mm (5.1 in)	51 years	56 of 100 (Notable)
17 September 2017	Chanute Martin Johnson AP, US	daily rain	65.0 mm (2.6 in)	29.9 mm (1.2 in)	118 years	54 of 100 (Notable)
17 September 2017	Tooma, EE	daily rain	28.8 mm (1.1 in)	12.5 mm (0.5 in)	60 years	53 of 100 (Notable)
17 September 2017	Medicine Lake 3 SE, US	daily rain	26.7 mm (1.1 in)	15.3 mm (0.6 in)	71 years	51 of 100 (Notable)
17 September 2017	Nes (Ameland), NL	daily rain	38.0 mm (1.5 in)	26.4 mm (1.0 in)	16 years	50 of 100 (Notable)
17 September 2017	Kenmare 1 WSW, US	daily rain	43.2 mm (1.7 in)	27.7 mm (1.1 in)	30 years	46 of 100 (Notable)
17 September 2017	Moe Gippsland Water, AU	daily rain	31.2 mm (1.2 in)	9.6 mm (0.38 in)	75 years	45 of 100 (Notable)
17 September 2017	Key West NAS, US	all-time high max	38.9 C (102.0 F)	1.7 C (3.1 F)	19 years	45 of 100 (Notable)
17 September 2017	Detour Village, US	daily high min	17.2 C (63.0 F)	1.6 C (2.9 F)	112 years	43 of 100 (Notable)
17 September 2017	Harrisonville, US	daily rain	48.0 mm (1.9 in)	9.6 mm (0.38 in)	94 years	43 of 100 (Notable)
17 September 2017	Stuttgart 9 ESE, US	monthly high min	26.7 C (80.1 F)	1.7 C (3.1 F)	72 years	42 of 100 (Notable)
17 September 2017	Charlevoix, US	daily high min	17.8 C (64.0 F)	1.1 C (2.0 F)	111 years	42 of 100 (Notable)
17 September 2017	Jogeva, EE	daily rain	26.9 mm (1.1 in)	10.1 mm (0.4 in)	38 years	41 of 100 (Notable)
17 September 2017	Valga, EE	daily rain	32.7 mm (1.3 in)	9.2 mm (0.36 in)	60 years	41 of 100 (Notable)
17 September 2017	Osawatomie, US	daily rain	68.6 mm (2.7 in)	34.6 mm (1.4 in)	59 years	41 of 100 (Notable)
17 September 2017	Tonganoxie 5SE, US	daily rain	70.6 mm (2.8 in)	35.8 mm (1.4 in)	59 years	41 of 100 (Notable)
17 September 2017	Asosan, JP	daily rain	146.1 mm (5.8 in)	50.6 mm (2.0 in)	64 years	40 of 100 (Notable)
17 September 2017	Uman, UA	daily high max	30.9 C (87.6 F)	1.4 C (2.5 F)	94 years	40 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 2017

Records set or tied on this calendar date in each year from 1796 to 2017. 2017 had 455 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 2017-09-17: 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	355
20 to 40	15
40 to 60	6
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	1