Weather Records on 17 September 2015

953 weather records were set or tied worldwide on 17 September 2015. Highest significance: Tryvasshogda, NO.

Key Facts for 17 September 2015

On 17 September 2015, 953 weather records were set or tied at long-record stations worldwide.
668 were record highs and 72 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 30 monthly and 922 daily.
Tryvasshogda set a daily record precipitation of 65.1 mm (2.6 in) on 17 September 2015.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 419 records.

Record Map

953 stations

953 station records on 17 September 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tryvasshogda	Norway	Record daily precipitation	65.1 mm (2.6 in)	62 of 100 (Major)
Seinajoki Pelmaa	Finland	Record daily precipitation	33.5 mm (1.3 in)	56 of 100 (Notable)
Mangsbodarna	Sweden	Record daily precipitation	36.6 mm (1.4 in)	54 of 100 (Notable)
Kauhava Lentokentta	Finland	Record daily precipitation	28.8 mm (1.1 in)	52 of 100 (Notable)
Hebgen Dam	United States	Record daily precipitation	51.3 mm (2.0 in)	52 of 100 (Notable)
Floter	Norway	Record daily precipitation	52.5 mm (2.1 in)	50 of 100 (Notable)
Hedrum	Norway	Record daily precipitation	58.5 mm (2.3 in)	49 of 100 (Notable)
Amery	United States	Record daily precipitation	57.9 mm (2.3 in)	49 of 100 (Notable)
Gordalen	Sweden	Record daily precipitation	61.7 mm (2.4 in)	48 of 100 (Notable)
Hvar	Croatia	Record high minimum temperature	25.7 C (78.3 F)	47 of 100 (Notable)
Nord Odal	Norway	Record daily precipitation	42.2 mm (1.7 in)	47 of 100 (Notable)
Skedsmo-Hellerud	Norway	Record daily precipitation	50.4 mm (2.0 in)	47 of 100 (Notable)
Lakeview Ridge	United States	Record daily precipitation	38.1 mm (1.5 in)	47 of 100 (Notable)
Maridalsoset	Norway	Record daily precipitation	49.0 mm (1.9 in)	45 of 100 (Notable)
Trangslet	Sweden	Record daily precipitation	42.1 mm (1.7 in)	45 of 100 (Notable)
Surat Thani	Thailand	Record daily precipitation	84.8 mm (3.3 in)	45 of 100 (Notable)
Island Park	United States	Record daily precipitation	37.3 mm (1.5 in)	45 of 100 (Notable)
St Paul Dwtn AP	United States	Record daily precipitation	71.9 mm (2.8 in)	45 of 100 (Notable)
Kremsmuenster	Austria	Record high maximum temperature	28.7 C (83.7 F)	44 of 100 (Notable)
Rygge	Norway	Record daily precipitation	40.9 mm (1.6 in)	44 of 100 (Notable)
Middleboro	United States	Record high maximum temperature	30.6 C (87.1 F)	44 of 100 (Notable)
Minneapolis-St Paul Intl AP	United States	Record daily precipitation	60.2 mm (2.4 in)	44 of 100 (Notable)
Baterod	Norway	Record daily precipitation	36.3 mm (1.4 in)	43 of 100 (Notable)
Sarpsborg	Norway	Record daily precipitation	38.6 mm (1.5 in)	43 of 100 (Notable)
Wattisham	United Kingdom	Record daily precipitation	29.7 mm (1.2 in)	43 of 100 (Notable)
Ft Pierce	United States	Record daily precipitation	119.4 mm (4.7 in)	43 of 100 (Notable)
Vadnais Lake	United States	Record daily precipitation	67.3 mm (2.6 in)	43 of 100 (Notable)
Ft Davis	United States	Record high minimum temperature	19.4 C (66.9 F)	43 of 100 (Notable)
Coalville 13 E	United States	Record daily precipitation	33.8 mm (1.3 in)	43 of 100 (Notable)
Grantsville 2W	United States	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
Kensington Upper (Burnside)	Australia	Record daily precipitation	30.4 mm (1.2 in)	42 of 100 (Notable)
Minsk	Belarus	Record high maximum temperature	25.8 C (78.4 F)	42 of 100 (Notable)
Igsi I Hobol	Norway	Record daily precipitation	44.6 mm (1.8 in)	42 of 100 (Notable)
Vilnius	Lithuania	Record high minimum temperature	16.3 C (61.3 F)	41 of 100 (Notable)
Barabinsk	Russia	Record low minimum temperature	-3.9 C (25.0 F)	41 of 100 (Notable)
Westcliffe	United States	Record high minimum temperature	12.2 C (54.0 F)	41 of 100 (Notable)
Abilene	United States	Record high minimum temperature	23.9 C (75.0 F)	41 of 100 (Notable)
Caledonia	United States	Record high minimum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Logan Radio Kvnu	United States	Record daily precipitation	32.8 mm (1.3 in)	41 of 100 (Notable)
Nordstrand	Norway	Record daily precipitation	37.5 mm (1.5 in)	40 of 100 (Notable)
Val de Loire	France	Record daily precipitation	25.9 mm (1.0 in)	39 of 100 (Notable)
Budapest	Hungary	Record high minimum temperature	21.3 C (70.3 F)	39 of 100 (Notable)
Gardermoen Sor	Norway	Record daily precipitation	52.9 mm (2.1 in)	39 of 100 (Notable)
Malung	Sweden	Record daily precipitation	33.4 mm (1.3 in)	39 of 100 (Notable)
Holjes	Sweden	Record daily precipitation	29.5 mm (1.2 in)	39 of 100 (Notable)
Trinidad	United States	Record high minimum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
Blaine	United States	Record high minimum temperature	15.6 C (60.1 F)	39 of 100 (Notable)
Plainview	United States	Record high minimum temperature	20.0 C (68.0 F)	38 of 100 (Notable)
Geraldton Airport	Australia	Record high maximum temperature	32.1 C (89.8 F)	37 of 100 (Notable)
Chassiron	France	Record daily precipitation	26.4 mm (1.0 in)	37 of 100 (Notable)
Trostberg	Germany	Record high maximum temperature	32.0 C (89.6 F)	37 of 100 (Notable)
Ukkestad	Norway	Record daily precipitation	55.4 mm (2.2 in)	37 of 100 (Notable)
Varfu Omul	Romania	Record high minimum temperature	7.8 C (46.0 F)	37 of 100 (Notable)
Moskalvo	Russia	Record high maximum temperature	25.0 C (77.0 F)	37 of 100 (Notable)
Idre_D	Sweden	Record daily precipitation	32.2 mm (1.3 in)	37 of 100 (Notable)
Tatum	United States	Record high minimum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Winter	United States	Record high minimum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Khlong Yai	Thailand	Record daily precipitation	155.2 mm (6.1 in)	36 of 100 (Notable)
Madison Dane Co Rgnl AP	United States	Record daily precipitation	54.6 mm (2.1 in)	36 of 100 (Notable)
Ostre Toten - Apelsvoll	Norway	Record daily precipitation	28.5 mm (1.1 in)	35 of 100 (Notable)

Counts by Type and Timescale

953 records

Records set or tied on 17 September 2015 by type: Highest daily maximum 274, Lowest daily maximum 46, Highest daily minimum 394, Lowest daily minimum 26, Heaviest daily rainfall 213.

Records on 17 September 2015 by type
Record type	Records
Highest daily maximum	274
Lowest daily maximum	46
Highest daily minimum	394
Lowest daily minimum	26
Heaviest daily rainfall	213
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 September 2015 by timescale: all-time 1, monthly 30, daily 922.

How Much Records Were Beaten By

796 broken records

Margins by which the 796 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 59.4. Ties are not counted.

Top 20 by Significance

17 September 2015

Top 20 records on 17 September 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 2015	Tryvasshogda, NO	daily rain	65.1 mm (2.6 in)	36.1 mm (1.4 in)	68 years	62 of 100 (Major)
17 September 2015	Seinajoki Pelmaa, FI	daily rain	33.5 mm (1.3 in)	16.9 mm (0.7 in)	50 years	56 of 100 (Notable)
17 September 2015	Mangsbodarna, SE	daily rain	36.6 mm (1.4 in)	20.0 mm (0.8 in)	65 years	54 of 100 (Notable)
17 September 2015	Kauhava Lentokentta, FI	daily rain	28.8 mm (1.1 in)	16.6 mm (0.7 in)	50 years	52 of 100 (Notable)
17 September 2015	Hebgen Dam, US	daily rain	51.3 mm (2.0 in)	31.7 mm (1.2 in)	9 years	52 of 100 (Notable)
17 September 2015	Floter, NO	daily rain	52.5 mm (2.1 in)	30.5 mm (1.2 in)	24 years	50 of 100 (Notable)
17 September 2015	Hedrum, NO	daily rain	58.5 mm (2.3 in)	16.0 mm (0.6 in)	80 years	49 of 100 (Notable)
17 September 2015	Amery, US	daily rain	57.9 mm (2.3 in)	18.5 mm (0.7 in)	88 years	49 of 100 (Notable)
17 September 2015	Gordalen, SE	daily rain	61.7 mm (2.4 in)	32.7 mm (1.3 in)	16 years	48 of 100 (Notable)
17 September 2015	Hvar, HR	daily high min	25.7 C (78.3 F)	1.9 C (3.4 F)	101 years	47 of 100 (Notable)
17 September 2015	Nord Odal, NO	daily rain	42.2 mm (1.7 in)	10.3 mm (0.4 in)	77 years	47 of 100 (Notable)
17 September 2015	Skedsmo-Hellerud, NO	daily rain	50.4 mm (2.0 in)	25.5 mm (1.0 in)	34 years	47 of 100 (Notable)
17 September 2015	Lakeview Ridge, US	daily rain	38.1 mm (1.5 in)	25.4 mm (1.0 in)	25 years	47 of 100 (Notable)
17 September 2015	Maridalsoset, NO	daily rain	49.0 mm (1.9 in)	22.9 mm (0.9 in)	34 years	45 of 100 (Notable)
17 September 2015	Trangslet, SE	daily rain	42.1 mm (1.7 in)	18.4 mm (0.7 in)	32 years	45 of 100 (Notable)
17 September 2015	Surat Thani, TH	daily rain	84.8 mm (3.3 in)	35.6 mm (1.4 in)	48 years	45 of 100 (Notable)
17 September 2015	Island Park, US	daily rain	37.3 mm (1.5 in)	11.9 mm (0.5 in)	70 years	45 of 100 (Notable)
17 September 2015	St Paul Dwtn AP, US	daily rain	71.9 mm (2.8 in)	22.6 mm (0.9 in)	72 years	45 of 100 (Notable)
17 September 2015	Kremsmuenster, AT	daily high max	28.7 C (83.7 F)	2.0 C (3.6 F)	121 years	44 of 100 (Notable)
17 September 2015	Rygge, NO	daily rain	40.9 mm (1.6 in)	21.1 mm (0.8 in)	34 years	44 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 2015

Records set or tied on this calendar date in each year from 1796 to 2015. 2015 had 953 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 2015-09-17: 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 10	725
10 to 20	46
20 to 30	15
30 to 40	7
40 to 50	0
50 to 60	3