Weather Records on 31 August 1917

60 weather records were set or tied worldwide on 31 August 1917. Highest significance: Port Campbell Post Office, AU.

Key Facts for 31 August 1917

On 31 August 1917, 60 weather records were set or tied at long-record stations worldwide.
8 were record highs and 2 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 57 daily.
Port Campbell Post Office set a daily record precipitation of 27.9 mm (1.1 in) on 31 August 1917.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 438 records.

Record Map

60 stations

60 station records on 31 August 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Port Campbell Post Office	Australia	Record daily precipitation	27.9 mm (1.1 in)	34 of 100 (Routine)
Cudgewa North	Australia	Record daily precipitation	47.0 mm (1.9 in)	31 of 100 (Routine)
Narre Warren North (Narre Warr	Australia	Record daily precipitation	29.5 mm (1.2 in)	31 of 100 (Routine)
Tumut (Red Hill Station)	Australia	Record daily precipitation	67.1 mm (2.6 in)	26 of 100 (Routine)
Athens	United States	Record daily precipitation	51.8 mm (2.0 in)	26 of 100 (Routine)
Warragul (Carbethon)	Australia	Record daily precipitation	32.3 mm (1.3 in)	24 of 100 (Routine)
Colac Botanical Gardens	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Beales Reservoir	Australia	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Pennyroyal Creek	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Armidale (Radio Station 2Ad)	Australia	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Officer (Jesmond Dene)	Australia	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Ashbourne	Australia	Record daily precipitation	25.4 mm (1.0 in)	19 of 100 (Routine)
Ballan	Australia	Record daily precipitation	15.7 mm (0.6 in)	19 of 100 (Routine)
Kapunda Reservoir	Australia	Record daily precipitation	15.5 mm (0.6 in)	17 of 100 (Routine)
Kardella (Fleetwood)	Australia	Record daily precipitation	26.7 mm (1.1 in)	17 of 100 (Routine)
Warburton	Australia	Record daily precipitation	49.5 mm (1.9 in)	17 of 100 (Routine)
New Westminster	Canada	Record high maximum temperature	27.8 C (82.0 F)	17 of 100 (Routine)
Gobarralong	Australia	Record daily precipitation	27.7 mm (1.1 in)	16 of 100 (Routine)
Chattanooga Wb City	United States	Record daily precipitation	42.7 mm (1.7 in)	16 of 100 (Routine)
Beenak	Australia	Record daily precipitation	47.8 mm (1.9 in)	15 of 100 (Routine)
Haparanda	Sweden	Record high minimum temperature	13.5 C (56.3 F)	15 of 100 (Routine)
Maitland (Weetulta)	Australia	Record daily precipitation	12.7 mm (0.5 in)	14 of 100 (Routine)
Yorketown	Australia	Record daily precipitation	9.9 mm (0.39 in)	14 of 100 (Routine)
Bungaree (Kirks Reservoir)	Australia	Record daily precipitation	19.8 mm (0.8 in)	14 of 100 (Routine)
Curnomona (Curnamona)	Australia	Record daily precipitation	0.5 mm (0.02 in)	13 of 100 (Routine)
Goolwa Council Depot	Australia	Record daily precipitation	11.2 mm (0.4 in)	13 of 100 (Routine)
Coonalpyn	Australia	Record daily precipitation	8.4 mm (0.33 in)	13 of 100 (Routine)
Wollun	Australia	Record daily precipitation	14.0 mm (0.6 in)	13 of 100 (Routine)
Blayney Post Office	Australia	Record daily precipitation	38.1 mm (1.5 in)	13 of 100 (Routine)
Yellowin	Australia	Record daily precipitation	38.1 mm (1.5 in)	13 of 100 (Routine)
Nicosia	Cyprus	Record high maximum temperature	40.0 C (104.0 F)	13 of 100 (Routine)
Cowell	Australia	Record daily precipitation	5.6 mm (0.22 in)	12 of 100 (Routine)
Hawker (Wilson)	Australia	Record daily precipitation	2.0 mm (0.08 in)	12 of 100 (Routine)
Carcoar	Australia	Record daily precipitation	29.2 mm (1.1 in)	12 of 100 (Routine)
Narra Allen	Australia	Record daily precipitation	34.3 mm (1.4 in)	12 of 100 (Routine)
Walwa	Australia	Record daily precipitation	41.9 mm (1.6 in)	12 of 100 (Routine)
Middletown 4 W	United States	Record daily precipitation	31.0 mm (1.2 in)	12 of 100 (Routine)
Cavan	Australia	Record daily precipitation	25.4 mm (1.0 in)	11 of 100 (Routine)
Merino (Glenorchy Estate)	Australia	Record daily precipitation	18.0 mm (0.7 in)	11 of 100 (Routine)
Visby_Flygplats	Sweden	Record high minimum temperature	14.6 C (58.3 F)	11 of 100 (Routine)
Bogo Bogolog	Australia	Record daily precipitation	30.0 mm (1.2 in)	10 of 100 (Routine)
Mount Bute	Australia	Record daily precipitation	14.0 mm (0.6 in)	10 of 100 (Routine)
Jerrys Plains Post Office	Australia	Record daily precipitation	13.2 mm (0.5 in)	9 of 100 (Routine)
Tumut (Wattle Cres)	Australia	Record daily precipitation	30.7 mm (1.2 in)	8 of 100 (Routine)
Woolsthorpe	Australia	Record daily precipitation	14.5 mm (0.6 in)	8 of 100 (Routine)
Portarlington	Australia	Record daily precipitation	13.2 mm (0.5 in)	6 of 100 (Routine)
Hambantota	Sri Lanka	Record high minimum temperature	25.4 C (77.7 F)	6 of 100 (Routine)
Skara 1	Sweden	Record high minimum temperature	12.0 C (53.6 F)	6 of 100 (Routine)
Blinman	Australia	Record daily precipitation	2.8 mm (0.11 in)	5 of 100 (Routine)
Thargomindah Post Office	Australia	Record daily precipitation	0.8 mm (0.03 in)	4 of 100 (Routine)
Caltowie	Australia	Record daily precipitation	11.7 mm (0.5 in)	3 of 100 (Routine)
Kapunda	Australia	Record daily precipitation	14.0 mm (0.6 in)	3 of 100 (Routine)
Galway	Ireland	Record low maximum temperature	15.6 C (60.1 F)	3 of 100 (Routine)
Edithburgh Post Office	Australia	Record daily precipitation	7.6 mm (0.30 in)	2 of 100 (Routine)
Wantabadgery	Australia	Record daily precipitation	15.7 mm (0.6 in)	2 of 100 (Routine)
Clunes	Australia	Record daily precipitation	11.9 mm (0.5 in)	2 of 100 (Routine)
Vanersborg	Sweden	Record high minimum temperature	13.0 C (55.4 F)	2 of 100 (Routine)
Astoria	United States	Record high maximum temperature	27.8 C (82.0 F)	1 of 100 (Routine)
Lindsay	Canada	Record low minimum temperature	2.2 C (36.0 F)	0 of 100 (Routine)

Counts by Type and Timescale

60 records

Records set or tied on 31 August 1917 by type: Highest daily maximum 3, Lowest daily maximum 1, Highest daily minimum 5, Lowest daily minimum 1, Heaviest daily rainfall 50.

Records on 31 August 1917 by type
Record type	Records
Highest daily maximum	3
Lowest daily maximum	1
Highest daily minimum	5
Lowest daily minimum	1
Heaviest daily rainfall	50
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 August 1917 by timescale: all-time 0, monthly 3, daily 57.

How Much Records Were Beaten By

51 broken records

Margins by which the 51 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 22.1. Ties are not counted.

Top 20 by Significance

31 August 1917

Top 20 records on 31 August 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 1917	Port Campbell Post Office, AU	daily rain	27.9 mm (1.1 in)	12.4 mm (0.5 in)	30 years	34 of 100 (Routine)
31 August 1917	Cudgewa North, AU	daily rain	47.0 mm (1.9 in)	17.0 mm (0.7 in)	16 years	31 of 100 (Routine)
31 August 1917	Narre Warren North (Narre Warr, AU	daily rain	29.5 mm (1.2 in)	9.4 mm (0.37 in)	27 years	31 of 100 (Routine)
31 August 1917	Tumut (Red Hill Station), AU	monthly rain	67.1 mm (2.6 in)	10.5 mm (0.4 in)	1 year	26 of 100 (Routine)
31 August 1917	Athens, US	daily rain	51.8 mm (2.0 in)	22.1 mm (0.9 in)	23 years	26 of 100 (Routine)
31 August 1917	Warragul (Carbethon), AU	daily rain	32.3 mm (1.3 in)	8.2 mm (0.32 in)	27 years	24 of 100 (Routine)
31 August 1917	Colac Botanical Gardens, AU	daily rain	22.9 mm (0.9 in)	14.3 mm (0.6 in)	28 years	20 of 100 (Routine)
31 August 1917	Beales Reservoir, AU	daily rain	24.6 mm (1.0 in)	10.1 mm (0.4 in)	28 years	20 of 100 (Routine)
31 August 1917	Dublin Phoenix Park, IE	daily rain	24.6 mm (1.0 in)	6.8 mm (0.27 in)	34 years	20 of 100 (Routine)
31 August 1917	Pennyroyal Creek, AU	daily rain	18.8 mm (0.7 in)	9.9 mm (0.39 in)	15 years	20 of 100 (Routine)
31 August 1917	Armidale (Radio Station 2Ad), AU	daily rain	11.4 mm (0.4 in)	1.0 mm (0.04 in)	44 years	20 of 100 (Routine)
31 August 1917	Officer (Jesmond Dene), AU	daily rain	21.1 mm (0.8 in)	4.8 mm (0.19 in)	28 years	20 of 100 (Routine)
31 August 1917	Ashbourne, AU	daily rain	25.4 mm (1.0 in)	7.6 mm (0.30 in)	19 years	19 of 100 (Routine)
31 August 1917	Ballan, AU	daily rain	15.7 mm (0.6 in)	2.2 mm (0.09 in)	41 years	19 of 100 (Routine)
31 August 1917	Kapunda Reservoir, AU	daily rain	15.5 mm (0.6 in)	3.3 mm (0.13 in)	27 years	17 of 100 (Routine)
31 August 1917	Kardella (Fleetwood), AU	daily rain	26.7 mm (1.1 in)	4.1 mm (0.16 in)	27 years	17 of 100 (Routine)
31 August 1917	Warburton, AU	monthly rain	49.5 mm (1.9 in)	0.2 mm (0.01 in)	12 years	17 of 100 (Routine)
31 August 1917	New Westminster, CA	daily high max	27.8 C (82.0 F)	0.6 C (1.1 F)	40 years	17 of 100 (Routine)
31 August 1917	Gobarralong, AU	daily rain	27.7 mm (1.1 in)	5.3 mm (0.21 in)	11 years	16 of 100 (Routine)
31 August 1917	Chattanooga Wb City, US	daily rain	42.7 mm (1.7 in)	6.6 mm (0.26 in)	28 years	16 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 1917

Records set or tied on this calendar date in each year from 1796 to 1917. 1917 had 60 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 1917-08-31: 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 5	32
5 to 10	12
10 to 15	5
15 to 20	1
20 to 25	1