Weather Records on 17 September 1915

48 weather records were set or tied worldwide on 17 September 1915. Highest significance: Lincoln UNIV Pwr Plt, US.

Key Facts for 17 September 1915

On 17 September 1915, 48 weather records were set or tied at long-record stations worldwide.
35 were record highs and 1 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 48 daily.
Lincoln UNIV Pwr Plt set a daily record precipitation of 49.3 mm (1.9 in) on 17 September 1915.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 425 records.

Record Map

48 stations

48 station records on 17 September 1915 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 1915: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lincoln UNIV Pwr Plt	United States	Record daily precipitation	49.3 mm (1.9 in)	29 of 100 (Routine)
Atlantic City Marina	United States	Record high maximum temperature	32.2 C (90.0 F)	27 of 100 (Routine)
Concordia ASOS	United States	Record daily precipitation	39.9 mm (1.6 in)	23 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	32.8 C (91.0 F)	22 of 100 (Routine)
Hamilton	Canada	Record high minimum temperature	18.9 C (66.0 F)	21 of 100 (Routine)
Gogland	Russia	Record daily precipitation	20.7 mm (0.8 in)	20 of 100 (Routine)
Svenska Hogarna	Sweden	Record daily precipitation	11.3 mm (0.4 in)	19 of 100 (Routine)
Kargopol	Russia	Record daily precipitation	11.0 mm (0.4 in)	18 of 100 (Routine)
Concord	United States	Record high maximum temperature	31.7 C (89.1 F)	18 of 100 (Routine)
Montreal McGill	Canada	Record high minimum temperature	17.2 C (63.0 F)	17 of 100 (Routine)
Philadelphia City	United States	Record high minimum temperature	22.8 C (73.0 F)	17 of 100 (Routine)
Washington	United States	Record high maximum temperature	33.3 C (91.9 F)	17 of 100 (Routine)
Ny City Cntrl Park	United States	Record high maximum temperature	32.8 C (91.0 F)	17 of 100 (Routine)
Nemours (Ghazaouet)	Algeria	Record daily precipitation	7.0 mm (0.28 in)	16 of 100 (Routine)
Washington	United States	Record high minimum temperature	21.7 C (71.1 F)	15 of 100 (Routine)
Gorki	Belarus	Record daily precipitation	11.9 mm (0.5 in)	14 of 100 (Routine)
Junsele	Sweden	Record daily precipitation	10.0 mm (0.4 in)	14 of 100 (Routine)
Sheffield	United Kingdom	Record high minimum temperature	15.0 C (59.0 F)	14 of 100 (Routine)
Cape May 2 NW	United States	Record high minimum temperature	23.3 C (73.9 F)	14 of 100 (Routine)
Baltimore Customs House	United States	Record high maximum temperature	33.3 C (91.9 F)	14 of 100 (Routine)
Cet Central England	United Kingdom	Record high minimum temperature	14.6 C (58.3 F)	13 of 100 (Routine)
World Trade Ctr	United States	Record high minimum temperature	21.1 C (70.0 F)	13 of 100 (Routine)
Atlantic City Marina	United States	Record high minimum temperature	22.8 C (73.0 F)	13 of 100 (Routine)
Dalhousie	Canada	Record high minimum temperature	12.2 C (54.0 F)	12 of 100 (Routine)
Arnsberg	Germany	Record high minimum temperature	14.5 C (58.1 F)	12 of 100 (Routine)
Portland	United States	Record high maximum temperature	31.7 C (89.1 F)	12 of 100 (Routine)
Blue Hill Coop	United States	Record high maximum temperature	30.0 C (86.0 F)	12 of 100 (Routine)
Vineland	United States	Record high minimum temperature	22.2 C (72.0 F)	12 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record high minimum temperature	20.0 C (68.0 F)	12 of 100 (Routine)
Gotska Sandon	Sweden	Record daily precipitation	4.6 mm (0.18 in)	11 of 100 (Routine)
Middletown 4 W	United States	Record high maximum temperature	31.1 C (88.0 F)	11 of 100 (Routine)
Lexington Bluegrass AP	United States	Record high minimum temperature	20.6 C (69.1 F)	11 of 100 (Routine)
Ny City Cntrl Park	United States	Record high minimum temperature	22.2 C (72.0 F)	11 of 100 (Routine)
Vasilevici	Belarus	Record daily precipitation	10.5 mm (0.4 in)	10 of 100 (Routine)
Berlin-Dahlem (Lfag)	Germany	Record daily precipitation	10.6 mm (0.4 in)	9 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high maximum temperature	32.8 C (91.0 F)	9 of 100 (Routine)
Ottawa	Canada	Record high minimum temperature	16.1 C (61.0 F)	7 of 100 (Routine)
Blue Hill Coop	United States	Record high minimum temperature	20.6 C (69.1 F)	7 of 100 (Routine)
Vytegra	Russia	Record daily precipitation	8.0 mm (0.31 in)	6 of 100 (Routine)
World Trade Ctr	United States	Record high maximum temperature	31.1 C (88.0 F)	6 of 100 (Routine)
Anticosti SW Point	Canada	Record low minimum temperature	0.6 C (33.1 F)	4 of 100 (Routine)
Baltimore Customs House	United States	Record high minimum temperature	21.7 C (71.1 F)	3 of 100 (Routine)
Philadelphia City	United States	Record high maximum temperature	32.8 C (91.0 F)	3 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high minimum temperature	21.1 C (70.0 F)	3 of 100 (Routine)
Chemnitz	Germany	Record high minimum temperature	13.8 C (56.8 F)	2 of 100 (Routine)
Chattanooga Wb City	United States	Record high minimum temperature	21.1 C (70.0 F)	2 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	16.7 C (62.1 F)	1 of 100 (Routine)
State College	United States	Record high minimum temperature	18.9 C (66.0 F)	1 of 100 (Routine)

Counts by Type and Timescale

48 records

Records set or tied on 17 September 1915 by type: Highest daily maximum 12, Highest daily minimum 23, Lowest daily minimum 1, Heaviest daily rainfall 12.

Records on 17 September 1915 by type
Record type	Records
Highest daily maximum	12
Lowest daily maximum	0
Highest daily minimum	23
Lowest daily minimum	1
Heaviest daily rainfall	12
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 September 1915 by timescale: all-time 0, monthly 0, daily 48.

How Much Records Were Beaten By

41 broken records

Margins by which the 41 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 38.4. Ties are not counted.

Top 20 by Significance

17 September 1915

Top 20 records on 17 September 1915 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1915	Lincoln UNIV Pwr Plt, US	daily rain	49.3 mm (1.9 in)	38.4 mm (1.5 in)	8 years	29 of 100 (Routine)
17 September 1915	Atlantic City Marina, US	daily high max	32.2 C (90.0 F)	4.4 C (7.9 F)	34 years	27 of 100 (Routine)
17 September 1915	Concordia ASOS, US	daily rain	39.9 mm (1.6 in)	25.2 mm (1.0 in)	8 years	23 of 100 (Routine)
17 September 1915	Cape May 2 NW, US	daily high max	32.8 C (91.0 F)	4.5 C (8.1 F)	19 years	22 of 100 (Routine)
17 September 1915	Hamilton, CA	daily high min	18.9 C (66.0 F)	1.1 C (2.0 F)	47 years	21 of 100 (Routine)
17 September 1915	Gogland, RU	daily rain	20.7 mm (0.8 in)	9.2 mm (0.36 in)	21 years	20 of 100 (Routine)
17 September 1915	Svenska Hogarna, SE	daily rain	11.3 mm (0.4 in)	2.8 mm (0.11 in)	34 years	19 of 100 (Routine)
17 September 1915	Kargopol, RU	daily rain	11.0 mm (0.4 in)	5.8 mm (0.23 in)	8 years	18 of 100 (Routine)
17 September 1915	Concord, US	daily high max	31.7 C (89.1 F)	1.7 C (3.1 F)	37 years	18 of 100 (Routine)
17 September 1915	Montreal McGill, CA	daily high min	17.2 C (63.0 F)	2.2 C (4.0 F)	28 years	17 of 100 (Routine)
17 September 1915	Philadelphia City, US	daily high min	22.8 C (73.0 F)	2.2 C (4.0 F)	26 years	17 of 100 (Routine)
17 September 1915	Washington, US	daily high max	33.3 C (91.9 F)	1.6 C (2.9 F)	28 years	17 of 100 (Routine)
17 September 1915	Ny City Cntrl Park, US	daily high max	32.8 C (91.0 F)	2.2 C (4.0 F)	28 years	17 of 100 (Routine)
17 September 1915	Nemours (Ghazaouet), DZ	daily rain	7.0 mm (0.28 in)	3.6 mm (0.14 in)	30 years	16 of 100 (Routine)
17 September 1915	Washington, US	daily high min	21.7 C (71.1 F)	0.6 C (1.1 F)	28 years	15 of 100 (Routine)
17 September 1915	Gorki, BY	daily rain	11.9 mm (0.5 in)	5.4 mm (0.21 in)	6 years	14 of 100 (Routine)
17 September 1915	Junsele, SE	daily rain	10.0 mm (0.4 in)	1.9 mm (0.07 in)	23 years	14 of 100 (Routine)
17 September 1915	Sheffield, GB	daily high min	15.0 C (59.0 F)	1.8 C (3.2 F)	16 years	14 of 100 (Routine)
17 September 1915	Cape May 2 NW, US	daily high min	23.3 C (73.9 F)	2.2 C (4.0 F)	20 years	14 of 100 (Routine)
17 September 1915	Baltimore Customs House, US	daily high max	33.3 C (91.9 F)	1.1 C (2.0 F)	28 years	14 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 1915

Records set or tied on this calendar date in each year from 1796 to 1915. 1915 had 48 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 1915-09-17: 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 5	36
5 to 10	3
10 to 15	0
15 to 20	0
20 to 25	0
25 to 30	1
30 to 35	0
35 to 40	1