Weather Records on 21 August 1986

1,166 weather records were set or tied worldwide on 21 August 1986. Highest significance: Vasilevici, BY.

Key Facts for 21 August 1986

On 21 August 1986, 1,166 weather records were set or tied at long-record stations worldwide.
356 were record highs and 302 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 41 monthly and 1,121 daily.
Vasilevici set a daily record precipitation of 65.4 mm (2.6 in) on 21 August 1986.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 446 records.

Record Map

1,166 stations

1,166 station records on 21 August 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Vasilevici	Belarus	Record daily precipitation	65.4 mm (2.6 in)	78 of 100 (Major)
West Yellowstone	United States	Record daily precipitation	58.9 mm (2.3 in)	66 of 100 (Major)
Evanston 1 E	United States	Record daily precipitation	33.3 mm (1.3 in)	65 of 100 (Major)
Bobruisk	Belarus	Record daily precipitation	110.0 mm (4.3 in)	63 of 100 (Major)
Hickman	United States	Record daily precipitation	111.8 mm (4.4 in)	62 of 100 (Major)
Coalville	United States	Record daily precipitation	66.0 mm (2.6 in)	60 of 100 (Major)
Morgan	United States	Record daily precipitation	55.9 mm (2.2 in)	58 of 100 (Notable)
Engenheiro Hermilo	Brazil	Record daily precipitation	68.5 mm (2.7 in)	56 of 100 (Notable)
Barao de Antonina	Brazil	Record daily precipitation	67.3 mm (2.6 in)	55 of 100 (Notable)
Gysinge	Sweden	Record daily precipitation	37.4 mm (1.5 in)	55 of 100 (Notable)
Hudson	United States	Record daily precipitation	97.0 mm (3.8 in)	55 of 100 (Notable)
Guarani	Brazil	Record daily precipitation	38.2 mm (1.5 in)	54 of 100 (Notable)
Krasnaja_Gora	Russia	Record daily precipitation	74.6 mm (2.9 in)	52 of 100 (Notable)
Adairsville	United States	Record daily precipitation	112.0 mm (4.4 in)	52 of 100 (Notable)
Guanhaes	Brazil	Record daily precipitation	46.6 mm (1.8 in)	51 of 100 (Notable)
Tatui	Brazil	Record daily precipitation	43.2 mm (1.7 in)	51 of 100 (Notable)
City Creek Wtp	United States	Record daily precipitation	53.6 mm (2.1 in)	51 of 100 (Notable)
Finnbacka_D	Sweden	Record daily precipitation	47.5 mm (1.9 in)	49 of 100 (Notable)
Luz (Estacao)	Brazil	Record daily precipitation	41.8 mm (1.6 in)	48 of 100 (Notable)
Petropavlovskij Majak	Russia	Record daily precipitation	64.0 mm (2.5 in)	48 of 100 (Notable)
Falun	Sweden	Record daily precipitation	46.8 mm (1.8 in)	48 of 100 (Notable)
Folkarna	Sweden	Record daily precipitation	47.0 mm (1.9 in)	48 of 100 (Notable)
Scipio	United States	Record daily precipitation	26.9 mm (1.1 in)	48 of 100 (Notable)
Campina Do Monte Alegre An/Ces	Brazil	Record daily precipitation	53.0 mm (2.1 in)	47 of 100 (Notable)
Jasper 1 NNW	United States	Record daily precipitation	78.2 mm (3.1 in)	47 of 100 (Notable)
Rougemont	United States	Record daily precipitation	98.3 mm (3.9 in)	47 of 100 (Notable)
Tabuleiro	Brazil	Record daily precipitation	42.6 mm (1.7 in)	46 of 100 (Notable)
Fazenda Aterradinho	Brazil	Record daily precipitation	53.2 mm (2.1 in)	46 of 100 (Notable)
Coronel Macedo	Brazil	Record daily precipitation	61.3 mm (2.4 in)	46 of 100 (Notable)
Fartura	Brazil	Record daily precipitation	56.8 mm (2.2 in)	46 of 100 (Notable)
Raleigh State UNIV	United States	Record daily precipitation	69.6 mm (2.7 in)	46 of 100 (Notable)
Cedar City AP	United States	Record daily precipitation	50.3 mm (2.0 in)	46 of 100 (Notable)
Astolfo Dutra	Brazil	Record daily precipitation	33.2 mm (1.3 in)	45 of 100 (Notable)
Fazenda Primavera	Brazil	Record daily precipitation	46.4 mm (1.8 in)	45 of 100 (Notable)
Angatuba	Brazil	Record daily precipitation	43.2 mm (1.7 in)	45 of 100 (Notable)
Saltair Salt Plt	United States	Record daily precipitation	33.0 mm (1.3 in)	45 of 100 (Notable)
Vinhedo	Brazil	Record daily precipitation	43.9 mm (1.7 in)	44 of 100 (Notable)
Elias Fausto	Brazil	Record daily precipitation	37.6 mm (1.5 in)	44 of 100 (Notable)
Indaiatuba	Brazil	Record daily precipitation	39.3 mm (1.5 in)	44 of 100 (Notable)
Solleron	Sweden	Record daily precipitation	39.5 mm (1.6 in)	44 of 100 (Notable)
Mora_A	Sweden	Record daily precipitation	43.0 mm (1.7 in)	44 of 100 (Notable)
Larned	United States	Record daily precipitation	60.2 mm (2.4 in)	44 of 100 (Notable)
Usina Ituere	Brazil	Record daily precipitation	33.6 mm (1.3 in)	43 of 100 (Notable)
Angatuba	Brazil	Record daily precipitation	47.3 mm (1.9 in)	43 of 100 (Notable)
Itaporanga	Brazil	Record daily precipitation	51.4 mm (2.0 in)	43 of 100 (Notable)
Torsby	Sweden	Record daily precipitation	48.0 mm (1.9 in)	43 of 100 (Notable)
Evertsberg	Sweden	Record daily precipitation	44.5 mm (1.8 in)	43 of 100 (Notable)
Avon Park 2 W	United States	Record low maximum temperature	25.0 C (77.0 F)	43 of 100 (Notable)
Cachoeira Escura	Brazil	Record daily precipitation	34.0 mm (1.3 in)	42 of 100 (Notable)
Patrocinio Do Muriae	Brazil	Record daily precipitation	34.2 mm (1.3 in)	42 of 100 (Notable)
Bairro Do Sarapu	Brazil	Record daily precipitation	43.1 mm (1.7 in)	42 of 100 (Notable)
Cuimato	Mexico	Record low minimum temperature	10.6 C (51.1 F)	42 of 100 (Notable)
Snoaby	Sweden	Record daily precipitation	42.9 mm (1.7 in)	42 of 100 (Notable)
Grycksbo_D	Sweden	Record daily precipitation	40.5 mm (1.6 in)	42 of 100 (Notable)
Durham	United States	Record daily precipitation	144.8 mm (5.7 in)	42 of 100 (Notable)
Fazenda Ano Bom Do Tiete	Brazil	Record daily precipitation	43.3 mm (1.7 in)	41 of 100 (Notable)
Sac City	United States	Record daily precipitation	42.4 mm (1.7 in)	41 of 100 (Notable)
Fazenda Campo Grande	Brazil	Record daily precipitation	26.6 mm (1.0 in)	40 of 100 (Notable)
Itapetininga	Brazil	Record daily precipitation	45.1 mm (1.8 in)	40 of 100 (Notable)
Semjachik	Russia	Record daily precipitation	99.4 mm (3.9 in)	40 of 100 (Notable)

Counts by Type and Timescale

1,166 records

Records set or tied on 21 August 1986 by type: Highest daily maximum 214, Lowest daily maximum 100, Highest daily minimum 142, Lowest daily minimum 202, Heaviest daily rainfall 508.

Records on 21 August 1986 by type
Record type	Records
Highest daily maximum	214
Lowest daily maximum	100
Highest daily minimum	142
Lowest daily minimum	202
Heaviest daily rainfall	508
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1986 by timescale: all-time 4, monthly 41, daily 1,121.

How Much Records Were Beaten By

953 broken records

Margins by which the 953 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.5. Ties are not counted.

Top 20 by Significance

21 August 1986

Top 20 records on 21 August 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1986	Vasilevici, BY	daily rain	65.4 mm (2.6 in)	44.9 mm (1.8 in)	94 years	78 of 100 (Major)
21 August 1986	West Yellowstone, US	monthly rain	58.9 mm (2.3 in)	24.4 mm (1.0 in)	35 years	66 of 100 (Major)
21 August 1986	Evanston 1 E, US	daily rain	33.3 mm (1.3 in)	24.9 mm (1.0 in)	53 years	65 of 100 (Major)
21 August 1986	Bobruisk, BY	all-time rain	110.0 mm (4.3 in)	30.0 mm (1.2 in)	7 years	63 of 100 (Major)
21 August 1986	Hickman, US	monthly rain	111.8 mm (4.4 in)	28.0 mm (1.1 in)	81 years	62 of 100 (Major)
21 August 1986	Coalville, US	all-time rain	66.0 mm (2.6 in)	13.7 mm (0.5 in)	17 years	60 of 100 (Major)
21 August 1986	Morgan, US	monthly rain	55.9 mm (2.2 in)	10.7 mm (0.4 in)	80 years	58 of 100 (Notable)
21 August 1986	Engenheiro Hermilo, BR	daily rain	68.5 mm (2.7 in)	57.5 mm (2.3 in)	40 years	56 of 100 (Notable)
21 August 1986	Barao de Antonina, BR	daily rain	67.3 mm (2.6 in)	63.0 mm (2.5 in)	35 years	55 of 100 (Notable)
21 August 1986	Gysinge, SE	daily rain	37.4 mm (1.5 in)	17.8 mm (0.7 in)	83 years	55 of 100 (Notable)
21 August 1986	Hudson, US	daily rain	97.0 mm (3.8 in)	65.5 mm (2.6 in)	32 years	55 of 100 (Notable)
21 August 1986	Guarani, BR	daily rain	38.2 mm (1.5 in)	35.0 mm (1.4 in)	33 years	54 of 100 (Notable)
21 August 1986	Krasnaja_Gora, RU	daily rain	74.6 mm (2.9 in)	33.0 mm (1.3 in)	33 years	52 of 100 (Notable)
21 August 1986	Adairsville, US	monthly rain	112.0 mm (4.4 in)	28.2 mm (1.1 in)	46 years	52 of 100 (Notable)
21 August 1986	Guanhaes, BR	monthly rain	46.6 mm (1.8 in)	15.6 mm (0.6 in)	18 years	51 of 100 (Notable)
21 August 1986	Tatui, BR	daily rain	43.2 mm (1.7 in)	36.2 mm (1.4 in)	35 years	51 of 100 (Notable)
21 August 1986	City Creek Wtp, US	monthly rain	53.6 mm (2.1 in)	22.6 mm (0.9 in)	14 years	51 of 100 (Notable)
21 August 1986	Finnbacka_D, SE	daily rain	47.5 mm (1.9 in)	31.5 mm (1.2 in)	16 years	49 of 100 (Notable)
21 August 1986	Luz (Estacao), BR	daily rain	41.8 mm (1.6 in)	31.8 mm (1.3 in)	28 years	48 of 100 (Notable)
21 August 1986	Petropavlovskij Majak, RU	daily rain	64.0 mm (2.5 in)	27.7 mm (1.1 in)	39 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

1800 to 1986

Records set or tied on this calendar date in each year from 1800 to 1986. 1986 had 1,166 records.

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

Records on 08-21 in each year
Year	Records
1800	1
1802	1
1804	1
1807	1
1816	1
1818	1
1832	1
1834	1
1839	3
1843	1
1847	1
1849	3
1850	1
1851	2
1863	1
1866	1
1867	2
1870	3
1871	2
1872	1
1873	1
1876	1
1877	2
1879	2
1884	2
1885	5
1886	1
1887	5
1888	2
1889	3
1890	4
1891	2
1893	4
1894	8
1895	3
1896	2
1897	4
1898	4
1899	7
1900	4
1901	9
1902	8
1903	6
1904	8
1905	4
1906	22
1907	20
1908	13
1909	17
1910	33
1911	19
1912	50
1913	37
1914	24
1915	21
1916	106
1917	101
1918	202
1919	19
1920	59
1921	34
1922	58
1923	111
1924	135
1925	220
1926	227
1927	228
1928	110
1929	234
1930	297
1931	277
1932	264
1933	328
1934	320
1935	318
1936	807
1937	762
1938	239
1939	630
1940	683
1941	180
1942	415
1943	438
1944	346
1945	544
1946	390
1947	954
1948	305
1949	508
1950	958
1951	699
1952	368
1953	331
1954	497
1955	885
1956	701
1957	490
1958	389
1959	704
1960	490
1961	644
1962	469
1963	338
1964	794
1965	455
1966	661
1967	541
1968	1,014
1969	650
1970	373
1971	660
1972	441
1973	438
1974	564
1975	545
1976	756
1977	764
1978	445
1979	778
1980	904
1981	1,015
1982	769
1983	1,407
1984	975
1985	623
1986	1,166
1987	740
1988	889
1989	828
1990	910
1991	828
1992	957
1993	698
1994	968
1995	962
1996	950
1997	1,291
1998	948
1999	717
2000	861
2001	797
2002	965
2003	1,241
2004	1,585
2005	1,071
2006	797
2007	1,829
2008	1,012
2009	1,319
2010	1,155
2011	1,022
2012	990
2013	513
2014	624
2015	651
2016	890
2017	347
2018	816
2019	631
2020	1,147
2021	767
2022	917
2023	1,826
2024	777
2025	1,230
2026	1,289

Download the Data

Data for records on 1986-08-21: 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	735
10 to 20	124
20 to 30	51
30 to 40	26
40 to 50	11
50 to 60	4
60 to 70	2