Weather Records on 31 August 1975

658 weather records were set or tied worldwide on 31 August 1975. Highest significance: Port Arthur, AU.

Key Facts for 31 August 1975

On 31 August 1975, 658 weather records were set or tied at long-record stations worldwide.
123 were record highs and 198 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 27 monthly and 628 daily.
Port Arthur set a daily record precipitation of 63.0 mm (2.5 in) on 31 August 1975.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 435 records.

Record Map

658 stations

658 station records on 31 August 1975 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Port Arthur	Australia	Record daily precipitation	63.0 mm (2.5 in)	68 of 100 (Major)
Hesperia 4 WNW	United States	Record daily precipitation	157.2 mm (6.2 in)	68 of 100 (Major)
Montague 4 NW	United States	Record daily precipitation	97.5 mm (3.8 in)	64 of 100 (Major)
Cadiz	United States	Record daily precipitation	68.6 mm (2.7 in)	59 of 100 (Notable)
McKeesport	United States	Record daily precipitation	66.0 mm (2.6 in)	58 of 100 (Notable)
Brownsville	United States	Record daily precipitation	126.7 mm (5.0 in)	58 of 100 (Notable)
Boqueirao Do Patu	Brazil	Record daily precipitation	40.2 mm (1.6 in)	55 of 100 (Notable)
Willowvale (Tnk)	South Africa	Record daily precipitation	69.0 mm (2.7 in)	55 of 100 (Notable)
Donora 1 SW	United States	Record daily precipitation	74.9 mm (2.9 in)	55 of 100 (Notable)
Morgantown Muni AP	United States	Record daily precipitation	61.2 mm (2.4 in)	55 of 100 (Notable)
Muskegon Co AP	United States	Record daily precipitation	75.4 mm (3.0 in)	55 of 100 (Notable)
Senador Pompeu	Brazil	Record daily precipitation	35.0 mm (1.4 in)	54 of 100 (Notable)
Srednij Kalar	Russia	Record daily precipitation	35.2 mm (1.4 in)	52 of 100 (Notable)
Kei Road (Pol)	South Africa	Record daily precipitation	60.0 mm (2.4 in)	52 of 100 (Notable)
Bens Run 1 SSE	United States	Record daily precipitation	62.5 mm (2.5 in)	52 of 100 (Notable)
Big Rapids Wtp	United States	Record daily precipitation	115.6 mm (4.6 in)	50 of 100 (Notable)
Mount Dutton	Australia	Record daily precipitation	33.0 mm (1.3 in)	49 of 100 (Notable)
Eaton Rapids	United States	Record daily precipitation	58.4 mm (2.3 in)	49 of 100 (Notable)
Berkeley Springs	United States	Record daily precipitation	44.5 mm (1.8 in)	49 of 100 (Notable)
Beerfelden	Germany	Record daily precipitation	37.8 mm (1.5 in)	48 of 100 (Notable)
Manubie (Bos)	South Africa	Record daily precipitation	146.0 mm (5.7 in)	48 of 100 (Notable)
Murom	Russia	Record daily precipitation	47.7 mm (1.9 in)	47 of 100 (Notable)
Franklyn Vale	Australia	Record daily precipitation	56.4 mm (2.2 in)	46 of 100 (Notable)
Ray Station	Australia	Record daily precipitation	68.0 mm (2.7 in)	46 of 100 (Notable)
College Park	United States	Record daily precipitation	74.9 mm (2.9 in)	46 of 100 (Notable)
Bucyrus	United States	Record daily precipitation	92.2 mm (3.6 in)	46 of 100 (Notable)
Caldwell 6 NW	United States	Record daily precipitation	61.0 mm (2.4 in)	46 of 100 (Notable)
Senecaville Lake	United States	Record daily precipitation	53.3 mm (2.1 in)	46 of 100 (Notable)
Charleville Aero	Australia	Record daily precipitation	32.4 mm (1.3 in)	45 of 100 (Notable)
Atemajac de Brizuela	Mexico	Record daily precipitation	63.0 mm (2.5 in)	45 of 100 (Notable)
Moorefield 1 SSE	United States	Record daily precipitation	58.2 mm (2.3 in)	45 of 100 (Notable)
Bruceton 1 S	United States	Record daily precipitation	59.2 mm (2.3 in)	44 of 100 (Notable)
Torrevieja	Spain	Record low minimum temperature	14.0 C (57.2 F)	43 of 100 (Notable)
Williamston 3NE	United States	Record daily precipitation	42.4 mm (1.7 in)	43 of 100 (Notable)
Summerfield 2 NE	United States	Record daily precipitation	71.9 mm (2.8 in)	43 of 100 (Notable)
Confluence 1 NW	United States	Record daily precipitation	51.8 mm (2.0 in)	43 of 100 (Notable)
Vienna	United States	Record daily precipitation	74.2 mm (2.9 in)	43 of 100 (Notable)
Bathurst Ns,	South Africa	Record daily precipitation	61.3 mm (2.4 in)	42 of 100 (Notable)
Bushnell 1 E	United States	Record daily precipitation	69.9 mm (2.8 in)	42 of 100 (Notable)
Lake City Exp Farm	United States	Record daily precipitation	63.5 mm (2.5 in)	41 of 100 (Notable)
Dennison Wtr Wks	United States	Record daily precipitation	48.3 mm (1.9 in)	41 of 100 (Notable)
Brandonville	United States	Record daily precipitation	48.0 mm (1.9 in)	41 of 100 (Notable)
Umzonia (Rsv)	South Africa	Record daily precipitation	62.2 mm (2.4 in)	40 of 100 (Notable)
Saguache	United States	Record low minimum temperature	-2.2 C (28.0 F)	40 of 100 (Notable)
La Plata 1 W	United States	Record daily precipitation	72.6 mm (2.9 in)	40 of 100 (Notable)
Howell Wwtp	United States	Record daily precipitation	44.5 mm (1.8 in)	40 of 100 (Notable)
Ackerman	United States	Record daily precipitation	66.8 mm (2.6 in)	40 of 100 (Notable)
Middlebourne 3 ESE	United States	Record daily precipitation	68.1 mm (2.7 in)	40 of 100 (Notable)
Letjiebos (Sar)	South Africa	Record daily precipitation	47.0 mm (1.9 in)	39 of 100 (Notable)
Greenville 2 NNE	United States	Record daily precipitation	49.0 mm (1.9 in)	39 of 100 (Notable)
Braddock Lock 2	United States	Record daily precipitation	49.0 mm (1.9 in)	39 of 100 (Notable)
Berryville	United States	Record daily precipitation	87.4 mm (3.4 in)	39 of 100 (Notable)
Dulacca Truck Stop	Australia	Record daily precipitation	34.0 mm (1.3 in)	38 of 100 (Notable)
Zaragoza (Smn)	Mexico	Record daily precipitation	39.9 mm (1.6 in)	38 of 100 (Notable)
Dohne	South Africa	Record daily precipitation	41.3 mm (1.6 in)	38 of 100 (Notable)
Valley View Lock 9	United States	Record daily precipitation	63.0 mm (2.5 in)	38 of 100 (Notable)
Hart 3 WSW	United States	Record daily precipitation	63.0 mm (2.5 in)	38 of 100 (Notable)
Nordby (Fano)	Denmark	Record high maximum temperature	27.0 C (80.6 F)	37 of 100 (Notable)
Alexandria (Bos)	South Africa	Record daily precipitation	57.0 mm (2.2 in)	37 of 100 (Notable)
Grand Haven Fire Dept	United States	Record daily precipitation	63.0 mm (2.5 in)	37 of 100 (Notable)

Counts by Type and Timescale

658 records

Records set or tied on 31 August 1975 by type: Highest daily maximum 72, Lowest daily maximum 120, Highest daily minimum 51, Lowest daily minimum 78, Heaviest daily rainfall 337.

Records on 31 August 1975 by type
Record type	Records
Highest daily maximum	72
Lowest daily maximum	120
Highest daily minimum	51
Lowest daily minimum	78
Heaviest daily rainfall	337
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 August 1975 by timescale: all-time 3, monthly 27, daily 628.

How Much Records Were Beaten By

525 broken records

Margins by which the 525 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 104.8. Ties are not counted.

Top 20 by Significance

31 August 1975

Top 20 records on 31 August 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 1975	Port Arthur, AU	daily rain	63.0 mm (2.5 in)	39.6 mm (1.6 in)	61 years	68 of 100 (Major)
31 August 1975	Hesperia 4 WNW, US	all-time rain	157.2 mm (6.2 in)	32.2 mm (1.3 in)	36 years	68 of 100 (Major)
31 August 1975	Montague 4 NW, US	all-time rain	97.5 mm (3.8 in)	18.8 mm (0.7 in)	70 years	64 of 100 (Major)
31 August 1975	Cadiz, US	daily rain	68.6 mm (2.7 in)	40.4 mm (1.6 in)	56 years	59 of 100 (Notable)
31 August 1975	McKeesport, US	daily rain	66.0 mm (2.6 in)	52.0 mm (2.0 in)	46 years	58 of 100 (Notable)
31 August 1975	Brownsville, US	daily rain	126.7 mm (5.0 in)	56.1 mm (2.2 in)	64 years	58 of 100 (Notable)
31 August 1975	Boqueirao Do Patu, BR	daily rain	40.2 mm (1.6 in)	40.2 mm (1.6 in)	53 years	55 of 100 (Notable)
31 August 1975	Willowvale (Tnk), ZA	daily rain	69.0 mm (2.7 in)	49.7 mm (2.0 in)	44 years	55 of 100 (Notable)
31 August 1975	Donora 1 SW, US	daily rain	74.9 mm (2.9 in)	53.3 mm (2.1 in)	34 years	55 of 100 (Notable)
31 August 1975	Morgantown Muni AP, US	daily rain	61.2 mm (2.4 in)	51.5 mm (2.0 in)	17 years	55 of 100 (Notable)
31 August 1975	Muskegon Co AP, US	daily rain	75.4 mm (3.0 in)	45.4 mm (1.8 in)	25 years	55 of 100 (Notable)
31 August 1975	Senador Pompeu, BR	daily rain	35.0 mm (1.4 in)	35.0 mm (1.4 in)	64 years	54 of 100 (Notable)
31 August 1975	Srednij Kalar, RU	daily rain	35.2 mm (1.4 in)	27.0 mm (1.1 in)	36 years	52 of 100 (Notable)
31 August 1975	Kei Road (Pol), ZA	daily rain	60.0 mm (2.4 in)	32.1 mm (1.3 in)	74 years	52 of 100 (Notable)
31 August 1975	Bens Run 1 SSE, US	daily rain	62.5 mm (2.5 in)	40.7 mm (1.6 in)	56 years	52 of 100 (Notable)
31 August 1975	Big Rapids Wtp, US	all-time rain	115.6 mm (4.6 in)	14.0 mm (0.6 in)	33 years	50 of 100 (Notable)
31 August 1975	Mount Dutton, AU	daily rain	33.0 mm (1.3 in)	30.0 mm (1.2 in)	28 years	49 of 100 (Notable)
31 August 1975	Eaton Rapids, US	daily rain	58.4 mm (2.3 in)	39.1 mm (1.5 in)	30 years	49 of 100 (Notable)
31 August 1975	Berkeley Springs, US	daily rain	44.5 mm (1.8 in)	27.7 mm (1.1 in)	70 years	49 of 100 (Notable)
31 August 1975	Beerfelden, DE	daily rain	37.8 mm (1.5 in)	28.1 mm (1.1 in)	29 years	48 of 100 (Notable)

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 1975

Records set or tied on this calendar date in each year from 1796 to 1975. 1975 had 658 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 1975-08-31: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	446
20 to 40	58
40 to 60	19
60 to 80	1
80 to 100	0
100 to 120	1