Weather Records on 31 August 1911

31 weather records were set or tied worldwide on 31 August 1911. Highest significance: Moorestown 4 E, US.

Key Facts for 31 August 1911

On 31 August 1911, 31 weather records were set or tied at long-record stations worldwide.
3 were record highs and 14 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 28 daily.
Moorestown 4 E set a daily record precipitation of 84.3 mm (3.3 in) on 31 August 1911.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 438 records.

Record Map

31 stations

31 station records on 31 August 1911 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 1911: highest significance records shown on the map
Station	Country	Type	Value	Significance
Moorestown 4 E	United States	Record daily precipitation	84.3 mm (3.3 in)	50 of 100 (Notable)
Philadelphia City	United States	Record daily precipitation	86.6 mm (3.4 in)	50 of 100 (Notable)
Newark Liberty Intl AP	United States	Record daily precipitation	101.1 mm (4.0 in)	49 of 100 (Notable)
Ny City Cntrl Park	United States	Record daily precipitation	95.5 mm (3.8 in)	47 of 100 (Notable)
Trenton 2	United States	Record daily precipitation	72.1 mm (2.8 in)	41 of 100 (Notable)
World Trade Ctr	United States	Record daily precipitation	82.3 mm (3.2 in)	40 of 100 (Notable)
Atlantic City Marina	United States	Record daily precipitation	63.0 mm (2.5 in)	37 of 100 (Notable)
Vineland	United States	Record daily precipitation	59.4 mm (2.3 in)	32 of 100 (Routine)
Reading Wb City	United States	Record daily precipitation	51.6 mm (2.0 in)	30 of 100 (Routine)
Melbourne Regional Office	Australia	Record high minimum temperature	13.5 C (56.3 F)	18 of 100 (Routine)
Cape Otway Lighthouse	Australia	Record high maximum temperature	22.8 C (73.0 F)	18 of 100 (Routine)
Paterson	United States	Record daily precipitation	47.0 mm (1.9 in)	18 of 100 (Routine)
Ny City Cntrl Park	United States	Record low maximum temperature	15.0 C (59.0 F)	18 of 100 (Routine)
Perth Regional Office	Australia	Record daily precipitation	17.3 mm (0.7 in)	17 of 100 (Routine)
Baltimore Customs House	United States	Record daily precipitation	32.8 mm (1.3 in)	17 of 100 (Routine)
Weldon	United States	Record daily precipitation	25.7 mm (1.0 in)	15 of 100 (Routine)
Washington	United States	Record low maximum temperature	17.2 C (63.0 F)	15 of 100 (Routine)
Concord	United States	Record low maximum temperature	15.0 C (59.0 F)	13 of 100 (Routine)
Cape Otway Lighthouse	Australia	Record high minimum temperature	12.2 C (54.0 F)	12 of 100 (Routine)
World Trade Ctr	United States	Record low minimum temperature	12.8 C (55.0 F)	12 of 100 (Routine)
Gravenhurst	Canada	Record low minimum temperature	3.9 C (39.0 F)	11 of 100 (Routine)
Portland	United States	Record low maximum temperature	14.4 C (57.9 F)	11 of 100 (Routine)
Philadelphia City	United States	Record low maximum temperature	16.1 C (61.0 F)	8 of 100 (Routine)
Newark Liberty Intl AP	United States	Record low maximum temperature	15.0 C (59.0 F)	8 of 100 (Routine)
Middletown 4 W	United States	Record daily precipitation	20.3 mm (0.8 in)	6 of 100 (Routine)
Chattanooga Wb City	United States	Record low maximum temperature	23.9 C (75.0 F)	6 of 100 (Routine)
Baltimore Customs House	United States	Record low maximum temperature	16.7 C (62.1 F)	3 of 100 (Routine)
Sydney	Canada	Record low minimum temperature	4.4 C (39.9 F)	2 of 100 (Routine)
Buffalo	United States	Record low minimum temperature	10.0 C (50.0 F)	2 of 100 (Routine)
Middletown 4 W	United States	Record low maximum temperature	15.6 C (60.1 F)	1 of 100 (Routine)
World Trade Ctr	United States	Record low maximum temperature	17.8 C (64.0 F)	1 of 100 (Routine)

Counts by Type and Timescale

31 records

Records set or tied on 31 August 1911 by type: Highest daily maximum 1, Lowest daily maximum 10, Highest daily minimum 2, Lowest daily minimum 4, Heaviest daily rainfall 14.

Records on 31 August 1911 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	10
Highest daily minimum	2
Lowest daily minimum	4
Heaviest daily rainfall	14
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 August 1911 by timescale: all-time 0, monthly 3, daily 28.

How Much Records Were Beaten By

25 broken records

Margins by which the 25 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 82.0. Ties are not counted.

Top 20 by Significance

31 August 1911

Top 20 records on 31 August 1911 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 1911	Moorestown 4 E, US	daily rain	84.3 mm (3.3 in)	72.9 mm (2.9 in)	24 years	50 of 100 (Notable)
31 August 1911	Philadelphia City, US	daily rain	86.6 mm (3.4 in)	82.0 mm (3.2 in)	22 years	50 of 100 (Notable)
31 August 1911	Newark Liberty Intl AP, US	daily rain	101.1 mm (4.0 in)	65.5 mm (2.6 in)	61 years	49 of 100 (Notable)
31 August 1911	Ny City Cntrl Park, US	daily rain	95.5 mm (3.8 in)	72.4 mm (2.9 in)	15 years	47 of 100 (Notable)
31 August 1911	Trenton 2, US	daily rain	72.1 mm (2.8 in)	52.3 mm (2.1 in)	37 years	41 of 100 (Notable)
31 August 1911	World Trade Ctr, US	daily rain	82.3 mm (3.2 in)	52.6 mm (2.1 in)	15 years	40 of 100 (Notable)
31 August 1911	Atlantic City Marina, US	daily rain	63.0 mm (2.5 in)	54.1 mm (2.1 in)	25 years	37 of 100 (Notable)
31 August 1911	Vineland, US	daily rain	59.4 mm (2.3 in)	40.3 mm (1.6 in)	13 years	32 of 100 (Routine)
31 August 1911	Reading Wb City, US	daily rain	51.6 mm (2.0 in)	39.4 mm (1.6 in)	9 years	30 of 100 (Routine)
31 August 1911	Melbourne Regional Office, AU	daily high min	13.5 C (56.3 F)	1.6 C (2.9 F)	26 years	18 of 100 (Routine)
31 August 1911	Cape Otway Lighthouse, AU	daily high max	22.8 C (73.0 F)	1.7 C (3.1 F)	26 years	18 of 100 (Routine)
31 August 1911	Paterson, US	daily rain	47.0 mm (1.9 in)	22.9 mm (0.9 in)	9 years	18 of 100 (Routine)
31 August 1911	Ny City Cntrl Park, US	monthly low max	15.0 C (59.0 F)	1.7 C (3.1 F)	0 years	18 of 100 (Routine)
31 August 1911	Perth Regional Office, AU	daily rain	17.3 mm (0.7 in)	9.9 mm (0.39 in)	15 years	17 of 100 (Routine)
31 August 1911	Baltimore Customs House, US	daily rain	32.8 mm (1.3 in)	13.0 mm (0.5 in)	15 years	17 of 100 (Routine)
31 August 1911	Weldon, US	daily rain	25.7 mm (1.0 in)	3.9 mm (0.15 in)	32 years	15 of 100 (Routine)
31 August 1911	Washington, US	daily low max	17.2 C (63.0 F)	2.8 C (5.0 F)	8 years	15 of 100 (Routine)
31 August 1911	Concord, US	daily low max	15.0 C (59.0 F)	1.1 C (2.0 F)	23 years	13 of 100 (Routine)
31 August 1911	Cape Otway Lighthouse, AU	daily high min	12.2 C (54.0 F)	1.1 C (2.0 F)	12 years	12 of 100 (Routine)
31 August 1911	World Trade Ctr, US	daily low min	12.8 C (55.0 F)	0.5 C (0.9 F)	20 years	12 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 1911

Records set or tied on this calendar date in each year from 1796 to 1911. 1911 had 31 records.

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

Records on 08-31 in each year
Year	Records
1796	1
1806	1
1807	2
1813	1
1814	1
1816	1
1827	1
1836	1
1846	1
1849	1
1851	1
1856	2
1858	1
1859	1
1860	1
1861	1
1863	1
1867	1
1869	1
1873	1
1875	1
1876	1
1877	2
1879	2
1881	3
1882	2
1885	1
1886	5
1887	1
1889	1
1890	2
1892	3
1893	1
1894	1
1895	1
1896	1
1897	5
1898	10
1899	4
1900	3
1901	5
1902	5
1903	16
1904	13
1905	8
1906	47
1907	6
1908	12
1909	39
1910	20
1911	31
1912	34
1913	40
1914	23
1915	71
1916	7
1917	60
1918	58
1919	25
1920	46
1921	86
1922	58
1923	63
1924	232
1925	111
1926	148
1927	103
1928	201
1929	300
1930	243
1931	192
1932	807
1933	424
1934	381
1935	540
1936	226
1937	508
1938	324
1939	296
1940	400
1941	528
1942	422
1943	650
1944	638
1945	572
1946	545
1947	473
1948	367
1949	409
1950	662
1951	910
1952	388
1953	1,054
1954	633
1955	539
1956	734
1957	317
1958	417
1959	496
1960	366
1961	625
1962	432
1963	415
1964	591
1965	886
1966	830
1967	952
1968	562
1969	474
1970	558
1971	326
1972	287
1973	793
1974	587
1975	658
1976	732
1977	621
1978	891
1979	400
1980	701
1981	692
1982	586
1983	788
1984	866
1985	854
1986	1,218
1987	836
1988	570
1989	622
1990	966
1991	848
1992	1,274
1993	1,286
1994	1,139
1995	1,077
1996	1,451
1997	943
1998	1,163
1999	988
2000	1,545
2001	944
2002	852
2003	1,232
2004	963
2005	1,782
2006	1,147
2007	1,110
2008	870
2009	1,224
2010	1,490
2011	994
2012	932
2013	771
2014	458
2015	1,074
2016	599
2017	596
2018	366
2019	781
2020	737
2021	553
2022	1,191
2023	600
2024	766
2025	307
2026	595

Download the Data

Data for records on 1911-08-31: 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 20	15
20 to 40	2
40 to 60	4
60 to 80	3
80 to 100	1