Weather Records on 15 September 1915

94 weather records were set or tied worldwide on 15 September 1915. Highest significance: Stratford, CA.

Key Facts for 15 September 1915

On 15 September 1915, 94 weather records were set or tied at long-record stations worldwide.
52 were record highs and 4 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 93 daily.
Stratford set a daily record high minimum temperature of 21.1 C (70.0 F) on 15 September 1915.
Across 170 earlier years (1797 to 2026) the same calendar date averaged 415 records.

Record Map

94 stations

94 station records on 15 September 1915 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 September 1915: highest significance records shown on the map
Station	Country	Type	Value	Significance
Stratford	Canada	Record high minimum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Peterborough	Canada	Record daily precipitation	33.3 mm (1.3 in)	24 of 100 (Routine)
Burlington	United States	Record high maximum temperature	33.3 C (91.9 F)	23 of 100 (Routine)
Cape Borda Comparison	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Ottawa	Canada	Record high maximum temperature	31.1 C (88.0 F)	20 of 100 (Routine)
Anticosti SW Point	Canada	Record low minimum temperature	-1.1 C (30.0 F)	20 of 100 (Routine)
Concord	United States	Record high maximum temperature	33.3 C (91.9 F)	20 of 100 (Routine)
Victor Harbor Comparison	Australia	Record daily precipitation	16.0 mm (0.6 in)	19 of 100 (Routine)
Montreal McGill	Canada	Record high maximum temperature	31.1 C (88.0 F)	19 of 100 (Routine)
Angaston	Australia	Record daily precipitation	19.3 mm (0.8 in)	18 of 100 (Routine)
Parry Sound	Canada	Record high minimum temperature	19.4 C (66.9 F)	18 of 100 (Routine)
Peterborough	Canada	Record high maximum temperature	30.6 C (87.1 F)	18 of 100 (Routine)
Concord	United States	Record high minimum temperature	20.0 C (68.0 F)	18 of 100 (Routine)
Stonecliffe	Canada	Record high maximum temperature	30.0 C (86.0 F)	17 of 100 (Routine)
Ottawa	Canada	Record high minimum temperature	21.1 C (70.0 F)	15 of 100 (Routine)
Arhangelsk	Russia	Record daily precipitation	12.5 mm (0.5 in)	15 of 100 (Routine)
Saddleworth	Australia	Record daily precipitation	10.4 mm (0.4 in)	14 of 100 (Routine)
Yankalilla (Woodvale)	Australia	Record daily precipitation	16.5 mm (0.6 in)	14 of 100 (Routine)
Edmonton	Canada	Record daily precipitation	6.9 mm (0.27 in)	14 of 100 (Routine)
Barrie	Canada	Record high maximum temperature	29.4 C (84.9 F)	14 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	21.7 C (71.1 F)	14 of 100 (Routine)
Hamilton	Canada	Record high minimum temperature	23.3 C (73.9 F)	14 of 100 (Routine)
Toronto	Canada	Record high minimum temperature	20.0 C (68.0 F)	14 of 100 (Routine)
World Trade Ctr	United States	Record high maximum temperature	31.1 C (88.0 F)	14 of 100 (Routine)
Philadelphia City	United States	Record high minimum temperature	23.9 C (75.0 F)	14 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high maximum temperature	32.8 C (91.0 F)	14 of 100 (Routine)
Bathurst Gaol	Australia	Record high minimum temperature	15.0 C (59.0 F)	13 of 100 (Routine)
Stradbroke Post Office	Australia	Record daily precipitation	26.2 mm (1.0 in)	13 of 100 (Routine)
London South	Canada	Record high minimum temperature	20.6 C (69.1 F)	13 of 100 (Routine)
Toronto	Canada	Record high maximum temperature	30.6 C (87.1 F)	13 of 100 (Routine)
Karesuando	Sweden	Record low minimum temperature	-6.5 C (20.3 F)	13 of 100 (Routine)
Adelaide (Pooraka)	Australia	Record daily precipitation	11.4 mm (0.4 in)	12 of 100 (Routine)
Dingo Vale	Australia	Record daily precipitation	23.9 mm (0.9 in)	12 of 100 (Routine)
Port Elliot Caravan Park	Australia	Record daily precipitation	11.7 mm (0.5 in)	12 of 100 (Routine)
Coleraine (Wondo Dale)	Australia	Record daily precipitation	6.9 mm (0.27 in)	12 of 100 (Routine)
Stony Mountain	Canada	Record low minimum temperature	-2.2 C (28.0 F)	12 of 100 (Routine)
Port Stanley	Canada	Record high minimum temperature	20.6 C (69.1 F)	12 of 100 (Routine)
Stratford	Canada	Record high maximum temperature	28.9 C (84.0 F)	12 of 100 (Routine)
State College	United States	Record high minimum temperature	20.6 C (69.1 F)	12 of 100 (Routine)
Gawler Council Depot	Australia	Record daily precipitation	11.2 mm (0.4 in)	11 of 100 (Routine)
Adelaide (Tea Tree Gully Counc	Australia	Record daily precipitation	14.5 mm (0.6 in)	11 of 100 (Routine)
Balmoral (Post Office)	Australia	Record daily precipitation	12.4 mm (0.5 in)	11 of 100 (Routine)
Welland	Canada	Record high minimum temperature	21.1 C (70.0 F)	11 of 100 (Routine)
World Trade Ctr	United States	Record high minimum temperature	22.2 C (72.0 F)	11 of 100 (Routine)
Winnemucca AP	United States	Record low minimum temperature	-2.8 C (27.0 F)	11 of 100 (Routine)
Ny City Cntrl Park	United States	Record high maximum temperature	32.8 C (91.0 F)	11 of 100 (Routine)
Auburn	Australia	Record daily precipitation	17.3 mm (0.7 in)	10 of 100 (Routine)
Snowtown	Australia	Record daily precipitation	7.6 mm (0.30 in)	10 of 100 (Routine)
Watervale	Australia	Record daily precipitation	15.7 mm (0.6 in)	10 of 100 (Routine)
Collingrove	Australia	Record daily precipitation	17.3 mm (0.7 in)	10 of 100 (Routine)
Sydney (Observatory Hill)	Australia	Record high minimum temperature	19.0 C (66.2 F)	10 of 100 (Routine)
Murtoa	Australia	Record daily precipitation	10.7 mm (0.4 in)	10 of 100 (Routine)
Windsor Riverside	Canada	Record high minimum temperature	21.1 C (70.0 F)	10 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	27.8 C (82.0 F)	10 of 100 (Routine)
Nuriootpa	Australia	Record daily precipitation	10.4 mm (0.4 in)	9 of 100 (Routine)
Riverton	Australia	Record daily precipitation	10.9 mm (0.4 in)	9 of 100 (Routine)
Bright Post Office	Australia	Record daily precipitation	18.5 mm (0.7 in)	9 of 100 (Routine)
Port Dover	Canada	Record high maximum temperature	31.1 C (88.0 F)	9 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record high minimum temperature	5.0 C (41.0 F)	9 of 100 (Routine)
Philadelphia City	United States	Record high maximum temperature	32.2 C (90.0 F)	9 of 100 (Routine)

Counts by Type and Timescale

94 records

Records set or tied on 15 September 1915 by type: Highest daily maximum 22, Highest daily minimum 30, Lowest daily minimum 4, Heaviest daily rainfall 38.

Records on 15 September 1915 by type
Record type	Records
Highest daily maximum	22
Lowest daily maximum	0
Highest daily minimum	30
Lowest daily minimum	4
Heaviest daily rainfall	38
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 September 1915 by timescale: all-time 0, monthly 1, daily 93.

How Much Records Were Beaten By

85 broken records

Margins by which the 85 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 15.0. Ties are not counted.

Top 20 by Significance

15 September 1915

Top 20 records on 15 September 1915 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 September 1915	Stratford, CA	daily high min	21.1 C (70.0 F)	5.5 C (9.9 F)	49 years	30 of 100 (Routine)
15 September 1915	Peterborough, CA	daily rain	33.3 mm (1.3 in)	15.0 mm (0.6 in)	21 years	24 of 100 (Routine)
15 September 1915	Burlington, US	monthly high max	33.3 C (91.9 F)	0.5 C (0.9 F)	31 years	23 of 100 (Routine)
15 September 1915	Cape Borda Comparison, AU	daily rain	12.7 mm (0.5 in)	2.8 mm (0.11 in)	43 years	20 of 100 (Routine)
15 September 1915	Ottawa, CA	daily high max	31.1 C (88.0 F)	2.2 C (4.0 F)	40 years	20 of 100 (Routine)
15 September 1915	Anticosti SW Point, CA	daily low min	-1.1 C (30.0 F)	2.8 C (5.0 F)	30 years	20 of 100 (Routine)
15 September 1915	Concord, US	daily high max	33.3 C (91.9 F)	2.7 C (4.9 F)	37 years	20 of 100 (Routine)
15 September 1915	Victor Harbor Comparison, AU	daily rain	16.0 mm (0.6 in)	8.6 mm (0.34 in)	5 years	19 of 100 (Routine)
15 September 1915	Montreal McGill, CA	daily high max	31.1 C (88.0 F)	2.2 C (4.0 F)	37 years	19 of 100 (Routine)
15 September 1915	Angaston, AU	daily rain	19.3 mm (0.8 in)	8.6 mm (0.34 in)	4 years	18 of 100 (Routine)
15 September 1915	Parry Sound, CA	daily high min	19.4 C (66.9 F)	3.3 C (5.9 F)	25 years	18 of 100 (Routine)
15 September 1915	Peterborough, CA	daily high max	30.6 C (87.1 F)	1.2 C (2.2 F)	37 years	18 of 100 (Routine)
15 September 1915	Concord, US	daily high min	20.0 C (68.0 F)	2.8 C (5.0 F)	31 years	18 of 100 (Routine)
15 September 1915	Stonecliffe, CA	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	37 years	17 of 100 (Routine)
15 September 1915	Ottawa, CA	daily high min	21.1 C (70.0 F)	2.2 C (4.0 F)	25 years	15 of 100 (Routine)
15 September 1915	Arhangelsk, RU	daily rain	12.5 mm (0.5 in)	2.0 mm (0.08 in)	28 years	15 of 100 (Routine)
15 September 1915	Saddleworth, AU	daily rain	10.4 mm (0.4 in)	1.8 mm (0.07 in)	23 years	14 of 100 (Routine)
15 September 1915	Yankalilla (Woodvale), AU	daily rain	16.5 mm (0.6 in)	5.8 mm (0.23 in)	2 years	14 of 100 (Routine)
15 September 1915	Edmonton, CA	daily rain	6.9 mm (0.27 in)	1.6 mm (0.06 in)	32 years	14 of 100 (Routine)
15 September 1915	Barrie, CA	daily high max	29.4 C (84.9 F)	1.6 C (2.9 F)	20 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

1797 to 1915

Records set or tied on this calendar date in each year from 1797 to 1915. 1915 had 94 records.

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

Records on 09-15 in each year
Year	Records
1797	1
1803	1
1806	2
1810	1
1816	1
1818	1
1823	2
1833	1
1836	1
1837	2
1839	1
1841	1
1848	1
1850	1
1851	1
1854	2
1856	1
1857	1
1859	1
1864	1
1865	2
1866	1
1867	2
1868	1
1869	1
1872	1
1873	2
1876	2
1877	2
1880	1
1881	1
1882	6
1884	3
1885	4
1886	2
1887	3
1888	1
1889	5
1890	1
1894	4
1895	1
1897	1
1898	3
1899	3
1900	1
1901	12
1902	7
1903	31
1904	30
1905	16
1906	6
1907	7
1908	16
1909	16
1910	2
1911	40
1912	64
1913	43
1914	18
1915	94
1916	44
1917	50
1918	50
1919	52
1920	164
1921	122
1922	53
1923	193
1924	103
1925	112
1926	134
1927	539
1928	86
1929	99
1930	235
1931	422
1932	295
1933	322
1934	351
1935	463
1936	460
1937	337
1938	247
1939	1,098
1940	181
1941	276
1942	278
1943	360
1944	396
1945	418
1946	411
1947	621
1948	557
1949	523
1950	750
1951	283
1952	455
1953	400
1954	518
1955	532
1956	646
1957	449
1958	294
1959	844
1960	410
1961	586
1962	557
1963	455
1964	839
1965	614
1966	534
1967	578
1968	429
1969	362
1970	1,157
1971	598
1972	356
1973	774
1974	386
1975	739
1976	667
1977	400
1978	628
1979	1,022
1980	563
1981	613
1982	1,315
1983	756
1984	766
1985	764
1986	928
1987	719
1988	818
1989	955
1990	911
1991	1,165
1992	919
1993	2,227
1994	1,363
1995	723
1996	1,212
1997	1,177
1998	1,768
1999	858
2000	1,175
2001	837
2002	1,212
2003	855
2004	893
2005	1,123
2006	1,042
2007	946
2008	1,153
2009	773
2010	913
2011	1,170
2012	568
2013	854
2014	443
2015	997
2016	988
2017	825
2018	874
2019	538
2020	785
2021	467
2022	392
2023	507
2024	681
2025	503
2026	779

Download the Data

Data for records on 1915-09-15: 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 2	49
2 to 4	25
4 to 6	6
6 to 8	2
8 to 10	2
10 to 12	0
12 to 14	0
14 to 16	1