Weather Records on 31 August 1984

866 weather records were set or tied worldwide on 31 August 1984. Highest significance: Unity, US.

Key Facts for 31 August 1984

On 31 August 1984, 866 weather records were set or tied at long-record stations worldwide.
327 were record highs and 186 were record lows, counting maximum and minimum temperature.
By timescale, 6 were all-time records, 30 monthly and 830 daily.
Unity set an all-time record daily precipitation of 61.7 mm (2.4 in) on 31 August 1984.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 433 records.

Record Map

866 stations

866 station records on 31 August 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Unity	United States	Record daily precipitation	61.7 mm (2.4 in)	81 of 100 (Exceptional)
O O Rch	United States	Record daily precipitation	51.3 mm (2.0 in)	65 of 100 (Major)
Richland	United States	Record daily precipitation	27.4 mm (1.1 in)	63 of 100 (Major)
Austin 3 S	United States	Record daily precipitation	51.8 mm (2.0 in)	62 of 100 (Major)
Seneca	United States	Record daily precipitation	51.3 mm (2.0 in)	61 of 100 (Major)
Ludiksdam	South Africa	Record daily precipitation	36.0 mm (1.4 in)	56 of 100 (Notable)
Hamilton	United States	Record daily precipitation	25.9 mm (1.0 in)	56 of 100 (Notable)
Mitchell 2 NW	United States	Record daily precipitation	35.3 mm (1.4 in)	55 of 100 (Notable)
Hart Mtn Refuge	United States	Record daily precipitation	32.3 mm (1.3 in)	54 of 100 (Notable)
Ellesmere	South Africa	Record daily precipitation	45.5 mm (1.8 in)	53 of 100 (Notable)
John Day	United States	Record daily precipitation	48.0 mm (1.9 in)	53 of 100 (Notable)
Mt Hebron Rs	United States	Record daily precipitation	31.0 mm (1.2 in)	51 of 100 (Notable)
Huoshan	China	Record daily precipitation	182.7 mm (7.2 in)	50 of 100 (Notable)
Squaw Butte-Northern Great Bas	United States	Record daily precipitation	51.3 mm (2.0 in)	50 of 100 (Notable)
Entre Rios de Minas	Brazil	Record daily precipitation	76.9 mm (3.0 in)	49 of 100 (Notable)
Sheffield	United Kingdom	Record high minimum temperature	17.4 C (63.3 F)	49 of 100 (Notable)
Ft Logan 4 ESE	United States	Record daily precipitation	28.2 mm (1.1 in)	49 of 100 (Notable)
Baker City AP	United States	Record daily precipitation	58.2 mm (2.3 in)	49 of 100 (Notable)
Cristais	Brazil	Record daily precipitation	40.4 mm (1.6 in)	48 of 100 (Notable)
Samnanger	Norway	Record daily precipitation	123.0 mm (4.8 in)	48 of 100 (Notable)
Rock Creek	United States	Record daily precipitation	65.0 mm (2.6 in)	47 of 100 (Notable)
Tussenvier	South Africa	Record daily precipitation	25.0 mm (1.0 in)	45 of 100 (Notable)
McCall	United States	Record daily precipitation	27.2 mm (1.1 in)	44 of 100 (Notable)
Valley Falls	United States	Record daily precipitation	38.9 mm (1.5 in)	44 of 100 (Notable)
Saint Maries	United States	Record low maximum temperature	10.0 C (50.0 F)	43 of 100 (Notable)
Beulah	United States	Record daily precipitation	26.2 mm (1.0 in)	43 of 100 (Notable)
Itajuipe (Piranji)	Brazil	Record daily precipitation	27.3 mm (1.1 in)	42 of 100 (Notable)
Atakpane	Togo	Record high maximum temperature	37.6 C (99.7 F)	42 of 100 (Notable)
Nyda	Russia	Record daily precipitation	35.9 mm (1.4 in)	41 of 100 (Notable)
Hawthorne AP	United States	Record low maximum temperature	23.3 C (73.9 F)	41 of 100 (Notable)
Darby	United States	Record daily precipitation	31.0 mm (1.2 in)	40 of 100 (Notable)
Mineral	United States	Record daily precipitation	34.3 mm (1.4 in)	39 of 100 (Notable)
Avon Park 2 W	United States	Record low minimum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
El Burrero	Mexico	Record daily precipitation	52.8 mm (2.1 in)	38 of 100 (Notable)
Kirensk	Russia	Record high maximum temperature	28.5 C (83.3 F)	38 of 100 (Notable)
Philippolis (Pol)	South Africa	Record daily precipitation	27.5 mm (1.1 in)	38 of 100 (Notable)
Buxton	United Kingdom	Record high minimum temperature	15.7 C (60.3 F)	38 of 100 (Notable)
Sharon Springs	United States	Record high minimum temperature	24.4 C (75.9 F)	38 of 100 (Notable)
Abadia Dos Dourados	Brazil	Record daily precipitation	31.1 mm (1.2 in)	37 of 100 (Notable)
Burukan	Russia	Record daily precipitation	69.9 mm (2.8 in)	37 of 100 (Notable)
Pahrump 4 NW	United States	Record high minimum temperature	24.4 C (75.9 F)	37 of 100 (Notable)
Grand Junction Walker Fld	United States	Record high minimum temperature	21.1 C (70.0 F)	37 of 100 (Notable)
Kirchdorf/Poel	Germany	Record high minimum temperature	17.5 C (63.5 F)	36 of 100 (Notable)
Bozeman 12 NE	United States	Record daily precipitation	36.8 mm (1.4 in)	36 of 100 (Notable)
Long Creek	United States	Record daily precipitation	40.6 mm (1.6 in)	36 of 100 (Notable)
Vale	United States	Record low maximum temperature	19.4 C (66.9 F)	36 of 100 (Notable)
White Sulphur Springs	United States	Record daily precipitation	65.3 mm (2.6 in)	36 of 100 (Notable)
Compton	South Africa	Record daily precipitation	30.0 mm (1.2 in)	35 of 100 (Notable)
Heritage	South Africa	Record daily precipitation	34.0 mm (1.3 in)	35 of 100 (Notable)
Cet Central England	United Kingdom	Record high minimum temperature	17.0 C (62.6 F)	35 of 100 (Notable)
Titusville	United States	Record low minimum temperature	18.9 C (66.0 F)	35 of 100 (Notable)
Jeriquara	Brazil	Record daily precipitation	26.3 mm (1.0 in)	34 of 100 (Routine)
Im. Poliny Osipenko	Russia	Record daily precipitation	59.6 mm (2.3 in)	34 of 100 (Routine)
Malvern	United Kingdom	Record high minimum temperature	18.2 C (64.8 F)	34 of 100 (Routine)
Rochester	United States	Record high minimum temperature	21.7 C (71.1 F)	34 of 100 (Routine)
Menard 3 NE	United States	Record daily precipitation	43.2 mm (1.7 in)	34 of 100 (Routine)
Webster Springs	United States	Record daily precipitation	60.2 mm (2.4 in)	33 of 100 (Routine)
Anadyr	Russia	Record high minimum temperature	9.2 C (48.6 F)	32 of 100 (Routine)
Kur	Russia	Record daily precipitation	56.7 mm (2.2 in)	32 of 100 (Routine)
Oorsprong-Oos	South Africa	Record daily precipitation	25.0 mm (1.0 in)	32 of 100 (Routine)

Counts by Type and Timescale

866 records

Records set or tied on 31 August 1984 by type: Highest daily maximum 115, Lowest daily maximum 66, Highest daily minimum 212, Lowest daily minimum 120, Heaviest daily rainfall 353.

Records on 31 August 1984 by type
Record type	Records
Highest daily maximum	115
Lowest daily maximum	66
Highest daily minimum	212
Lowest daily minimum	120
Heaviest daily rainfall	353
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 August 1984 by timescale: all-time 6, monthly 30, daily 830.

How Much Records Were Beaten By

691 broken records

Margins by which the 691 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 153.8. Ties are not counted.

Top 20 by Significance

31 August 1984

Top 20 records on 31 August 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 1984	Unity, US	all-time rain	61.7 mm (2.4 in)	15.5 mm (0.6 in)	74 years	81 of 100 (Exceptional)
31 August 1984	O O Rch, US	all-time rain	51.3 mm (2.0 in)	18.3 mm (0.7 in)	21 years	65 of 100 (Major)
31 August 1984	Richland, US	daily rain	27.4 mm (1.1 in)	17.2 mm (0.7 in)	62 years	63 of 100 (Major)
31 August 1984	Austin 3 S, US	monthly rain	51.8 mm (2.0 in)	28.9 mm (1.1 in)	19 years	62 of 100 (Major)
31 August 1984	Seneca, US	daily rain	51.3 mm (2.0 in)	46.0 mm (1.8 in)	47 years	61 of 100 (Major)
31 August 1984	Ludiksdam, ZA	daily rain	36.0 mm (1.4 in)	36.0 mm (1.4 in)	61 years	56 of 100 (Notable)
31 August 1984	Hamilton, US	daily rain	25.9 mm (1.0 in)	15.7 mm (0.6 in)	49 years	56 of 100 (Notable)
31 August 1984	Mitchell 2 NW, US	daily rain	35.3 mm (1.4 in)	24.6 mm (1.0 in)	38 years	55 of 100 (Notable)
31 August 1984	Hart Mtn Refuge, US	monthly rain	32.3 mm (1.3 in)	13.5 mm (0.5 in)	26 years	54 of 100 (Notable)
31 August 1984	Ellesmere, ZA	daily rain	45.5 mm (1.8 in)	23.4 mm (0.9 in)	66 years	53 of 100 (Notable)
31 August 1984	John Day, US	all-time rain	48.0 mm (1.9 in)	1.5 mm (0.06 in)	78 years	53 of 100 (Notable)
31 August 1984	Mt Hebron Rs, US	daily rain	31.0 mm (1.2 in)	25.2 mm (1.0 in)	21 years	51 of 100 (Notable)
31 August 1984	Huoshan, CN	daily rain	182.7 mm (7.2 in)	153.8 mm (6.1 in)	25 years	50 of 100 (Notable)
31 August 1984	Squaw Butte-Northern Great Bas, US	daily rain	51.3 mm (2.0 in)	43.7 mm (1.7 in)	20 years	50 of 100 (Notable)
31 August 1984	Entre Rios de Minas, BR	monthly rain	76.9 mm (3.0 in)	29.9 mm (1.2 in)	19 years	49 of 100 (Notable)
31 August 1984	Sheffield, GB	daily high min	17.4 C (63.3 F)	2.3 C (4.1 F)	97 years	49 of 100 (Notable)
31 August 1984	Ft Logan 4 ESE, US	daily rain	28.2 mm (1.1 in)	22.4 mm (0.9 in)	11 years	49 of 100 (Notable)
31 August 1984	Baker City AP, US	all-time rain	58.2 mm (2.3 in)	8.4 mm (0.33 in)	26 years	49 of 100 (Notable)
31 August 1984	Cristais, BR	monthly rain	40.4 mm (1.6 in)	17.1 mm (0.7 in)	18 years	48 of 100 (Notable)
31 August 1984	Samnanger, NO	daily rain	123.0 mm (4.8 in)	69.8 mm (2.7 in)	2 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 1984

Records set or tied on this calendar date in each year from 1796 to 1984. 1984 had 866 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 1984-08-31: 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	660
20 to 40	25
40 to 60	4
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	0
140 to 160	1