Weather Records on 21 October 1915

43 weather records were set or tied worldwide on 21 October 1915. Highest significance: Montgomery Wb City, US.

Key Facts for 21 October 1915

On 21 October 1915, 43 weather records were set or tied at long-record stations worldwide.
35 were record highs and 0 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 43 daily.
Montgomery Wb City set a daily record precipitation of 54.4 mm (2.1 in) on 21 October 1915.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 422 records.

Record Map

43 stations

43 station records on 21 October 1915 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 October 1915: highest significance records shown on the map
Station	Country	Type	Value	Significance
Montgomery Wb City	United States	Record daily precipitation	54.4 mm (2.1 in)	48 of 100 (Notable)
Perth Regional Office	Australia	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Hambantota	Sri Lanka	Record high minimum temperature	25.8 C (78.4 F)	17 of 100 (Routine)
Atlantic City Marina	United States	Record high minimum temperature	17.8 C (64.0 F)	17 of 100 (Routine)
Melrose	Australia	Record daily precipitation	9.4 mm (0.37 in)	16 of 100 (Routine)
Baltimore Customs House	United States	Record high maximum temperature	26.7 C (80.1 F)	16 of 100 (Routine)
Winnemucca AP	United States	Record high maximum temperature	28.3 C (82.9 F)	16 of 100 (Routine)
Arumpo	Australia	Record daily precipitation	13.7 mm (0.5 in)	15 of 100 (Routine)
Cape May 2 NW	United States	Record high minimum temperature	17.8 C (64.0 F)	15 of 100 (Routine)
Philadelphia City	United States	Record high maximum temperature	26.1 C (79.0 F)	15 of 100 (Routine)
Washington	United States	Record high maximum temperature	26.1 C (79.0 F)	15 of 100 (Routine)
Halifax	Canada	Record high minimum temperature	13.3 C (55.9 F)	14 of 100 (Routine)
Moonaree	Australia	Record daily precipitation	10.7 mm (0.4 in)	13 of 100 (Routine)
Burra (Poonunda)	Australia	Record daily precipitation	6.1 mm (0.24 in)	11 of 100 (Routine)
Robe Comparison	Australia	Record high minimum temperature	15.6 C (60.1 F)	11 of 100 (Routine)
Vineland	United States	Record high minimum temperature	17.8 C (64.0 F)	11 of 100 (Routine)
Baltimore Customs House	United States	Record high minimum temperature	17.2 C (63.0 F)	11 of 100 (Routine)
Philadelphia City	United States	Record high minimum temperature	17.2 C (63.0 F)	11 of 100 (Routine)
Medicine Hat A	Canada	Record high maximum temperature	25.6 C (78.1 F)	9 of 100 (Routine)
Blue Hill Coop	United States	Record high minimum temperature	15.0 C (59.0 F)	9 of 100 (Routine)
Washington	United States	Record high minimum temperature	15.6 C (60.1 F)	9 of 100 (Routine)
Sydney	Canada	Record high minimum temperature	12.2 C (54.0 F)	7 of 100 (Routine)
Yarmouth	Canada	Record daily precipitation	13.7 mm (0.5 in)	7 of 100 (Routine)
World Trade Ctr	United States	Record high minimum temperature	14.4 C (57.9 F)	6 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high maximum temperature	24.4 C (75.9 F)	6 of 100 (Routine)
Charlottetown	Canada	Record high minimum temperature	12.2 C (54.0 F)	5 of 100 (Routine)
State College	United States	Record high minimum temperature	12.8 C (55.0 F)	5 of 100 (Routine)
Ny City Cntrl Park	United States	Record high maximum temperature	25.6 C (78.1 F)	5 of 100 (Routine)
Jacksonville Wb City	United States	Record high minimum temperature	21.7 C (71.1 F)	4 of 100 (Routine)
Stradbroke Post Office	Australia	Record daily precipitation	26.7 mm (1.1 in)	3 of 100 (Routine)
Gravenhurst	Canada	Record high maximum temperature	20.0 C (68.0 F)	3 of 100 (Routine)
Portland	United States	Record high minimum temperature	12.2 C (54.0 F)	3 of 100 (Routine)
Atlantic City Marina	United States	Record high maximum temperature	22.2 C (72.0 F)	3 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high minimum temperature	15.0 C (59.0 F)	3 of 100 (Routine)
Ny City Cntrl Park	United States	Record high minimum temperature	15.0 C (59.0 F)	3 of 100 (Routine)
Beatrice	Canada	Record high minimum temperature	8.9 C (48.0 F)	2 of 100 (Routine)
Greenville Dwtn AP	United States	Record high minimum temperature	16.1 C (61.0 F)	2 of 100 (Routine)
Calgary Int'l A	Canada	Record high maximum temperature	23.3 C (73.9 F)	1 of 100 (Routine)
Chatham	Canada	Record high minimum temperature	11.1 C (52.0 F)	1 of 100 (Routine)
Halifax	Canada	Record high maximum temperature	18.3 C (64.9 F)	1 of 100 (Routine)
Middletown 4 W	United States	Record high minimum temperature	13.3 C (55.9 F)	1 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	22.8 C (73.0 F)	0 of 100 (Routine)
Vineland	United States	Record high maximum temperature	25.0 C (77.0 F)	0 of 100 (Routine)

Counts by Type and Timescale

43 records

Records set or tied on 21 October 1915 by type: Highest daily maximum 13, Highest daily minimum 22, Heaviest daily rainfall 8.

Records on 21 October 1915 by type
Record type	Records
Highest daily maximum	13
Lowest daily maximum	0
Highest daily minimum	22
Lowest daily minimum	0
Heaviest daily rainfall	8
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 October 1915 by timescale: all-time 0, monthly 0, daily 43.

How Much Records Were Beaten By

27 broken records

Margins by which the 27 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 50.6. Ties are not counted.

Top 20 by Significance

21 October 1915

Top 20 records on 21 October 1915 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1915	Montgomery Wb City, US	daily rain	54.4 mm (2.1 in)	50.6 mm (2.0 in)	24 years	48 of 100 (Notable)
21 October 1915	Perth Regional Office, AU	daily rain	14.2 mm (0.6 in)	8.4 mm (0.33 in)	24 years	20 of 100 (Routine)
21 October 1915	Hambantota, LK	daily high min	25.8 C (78.4 F)	1.1 C (2.0 F)	9 years	17 of 100 (Routine)
21 October 1915	Atlantic City Marina, US	daily high min	17.8 C (64.0 F)	2.2 C (4.0 F)	30 years	17 of 100 (Routine)
21 October 1915	Melrose, AU	daily rain	9.4 mm (0.37 in)	3.3 mm (0.13 in)	28 years	16 of 100 (Routine)
21 October 1915	Baltimore Customs House, US	daily high max	26.7 C (80.1 F)	1.7 C (3.1 F)	30 years	16 of 100 (Routine)
21 October 1915	Winnemucca AP, US	daily high max	28.3 C (82.9 F)	3.3 C (5.9 F)	23 years	16 of 100 (Routine)
21 October 1915	Arumpo, AU	daily rain	13.7 mm (0.5 in)	2.3 mm (0.09 in)	34 years	15 of 100 (Routine)
21 October 1915	Cape May 2 NW, US	daily high min	17.8 C (64.0 F)	0.6 C (1.1 F)	37 years	15 of 100 (Routine)
21 October 1915	Philadelphia City, US	daily high max	26.1 C (79.0 F)	1.1 C (2.0 F)	30 years	15 of 100 (Routine)
21 October 1915	Washington, US	daily high max	26.1 C (79.0 F)	0.4 C (0.7 F)	30 years	15 of 100 (Routine)
21 October 1915	Halifax, CA	daily high min	13.3 C (55.9 F)	3.3 C (5.9 F)	10 years	14 of 100 (Routine)
21 October 1915	Moonaree, AU	daily rain	10.7 mm (0.4 in)	6.1 mm (0.24 in)	5 years	13 of 100 (Routine)
21 October 1915	Burra (Poonunda), AU	daily rain	6.1 mm (0.24 in)	0.8 mm (0.03 in)	24 years	11 of 100 (Routine)
21 October 1915	Robe Comparison, AU	daily high min	15.6 C (60.1 F)	1.0 C (1.8 F)	18 years	11 of 100 (Routine)
21 October 1915	Vineland, US	daily high min	17.8 C (64.0 F)	3.9 C (7.0 F)	4 years	11 of 100 (Routine)
21 October 1915	Baltimore Customs House, US	daily high min	17.2 C (63.0 F)	2.8 C (5.0 F)	4 years	11 of 100 (Routine)
21 October 1915	Philadelphia City, US	daily high min	17.2 C (63.0 F)	3.3 C (5.9 F)	0 years	11 of 100 (Routine)
21 October 1915	Medicine Hat A, CA	daily high max	25.6 C (78.1 F)	1.7 C (3.1 F)	13 years	9 of 100 (Routine)
21 October 1915	Blue Hill Coop, US	daily high min	15.0 C (59.0 F)	1.7 C (3.1 F)	10 years	9 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

1795 to 1915

Records set or tied on this calendar date in each year from 1795 to 1915. 1915 had 43 records.

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

Records on 10-21 in each year
Year	Records
1795	1
1802	2
1805	1
1808	1
1810	1
1834	1
1835	1
1840	1
1845	1
1847	1
1850	1
1851	2
1854	1
1859	1
1863	1
1864	1
1866	3
1867	1
1868	3
1869	2
1871	1
1872	1
1873	1
1874	1
1876	4
1877	2
1878	1
1880	3
1881	1
1883	1
1886	1
1888	2
1889	2
1890	3
1891	6
1892	6
1893	1
1894	1
1895	2
1896	5
1898	6
1899	3
1900	2
1901	9
1902	2
1903	3
1904	30
1905	15
1906	11
1907	35
1908	35
1909	19
1910	21
1911	10
1912	18
1913	59
1914	35
1915	43
1916	70
1917	208
1918	18
1919	102
1920	149
1921	58
1922	78
1923	81
1924	389
1925	150
1926	77
1927	187
1928	78
1929	200
1930	492
1931	217
1932	165
1933	733
1934	407
1935	707
1936	407
1937	132
1938	121
1939	491
1940	537
1941	644
1942	258
1943	421
1944	367
1945	538
1946	297
1947	977
1948	266
1949	1,015
1950	438
1951	382
1952	848
1953	1,579
1954	279
1955	481
1956	276
1957	511
1958	322
1959	410
1960	408
1961	553
1962	359
1963	725
1964	457
1965	465
1966	425
1967	472
1968	174
1969	881
1970	548
1971	498
1972	813
1973	464
1974	866
1975	509
1976	1,467
1977	451
1978	616
1979	1,958
1980	378
1981	667
1982	870
1983	786
1984	1,872
1985	776
1986	814
1987	852
1988	696
1989	1,668
1990	807
1991	877
1992	1,095
1993	845
1994	670
1995	1,120
1996	1,581
1997	915
1998	711
1999	688
2000	771
2001	610
2002	1,241
2003	2,066
2004	1,674
2005	949
2006	1,057
2007	916
2008	610
2009	713
2010	710
2011	662
2012	703
2013	440
2014	716
2015	493
2016	734
2017	750
2018	440
2019	757
2020	1,135
2021	574
2022	629
2023	890
2024	1,138
2025	364

Download the Data

Data for records on 1915-10-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 10	26
10 to 20	0
20 to 30	0
30 to 40	0
40 to 50	0
50 to 60	1