Weather Records on 21 August 1990

910 weather records were set or tied worldwide on 21 August 1990. Highest significance: Arlington, US.

Key Facts for 21 August 1990

On 21 August 1990, 910 weather records were set or tied at long-record stations worldwide.
240 were record highs and 379 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 39 monthly and 867 daily.
Arlington set a monthly record daily precipitation of 42.9 mm (1.7 in) on 21 August 1990.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 447 records.

Record Map

910 stations

910 station records on 21 August 1990 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1990: highest significance records shown on the map
Station	Country	Type	Value	Significance
Arlington	United States	Record daily precipitation	42.9 mm (1.7 in)	75 of 100 (Major)
Wasco	United States	Record daily precipitation	34.5 mm (1.4 in)	64 of 100 (Major)
Ellensburg	United States	Record daily precipitation	40.6 mm (1.6 in)	63 of 100 (Major)
Lind 3 NE	United States	Record daily precipitation	33.3 mm (1.3 in)	62 of 100 (Major)
Pontal	Brazil	Record daily precipitation	46.3 mm (1.8 in)	56 of 100 (Notable)
Leavenworth 3 S	United States	Record daily precipitation	34.8 mm (1.4 in)	55 of 100 (Notable)
Blumenau (Pcd)	Brazil	Record daily precipitation	66.7 mm (2.6 in)	54 of 100 (Notable)
Delphi 2 N	United States	Record daily precipitation	67.1 mm (2.6 in)	54 of 100 (Notable)
Mikkalo 6 W	United States	Record daily precipitation	32.8 mm (1.3 in)	54 of 100 (Notable)
Sotchi	Russia	Record daily precipitation	77.6 mm (3.1 in)	53 of 100 (Notable)
Ulken Nary	Kazakhstan	Record daily precipitation	30.0 mm (1.2 in)	52 of 100 (Notable)
Chardon	United States	Record daily precipitation	81.3 mm (3.2 in)	52 of 100 (Notable)
Cle Elum	United States	Record daily precipitation	47.0 mm (1.9 in)	52 of 100 (Notable)
Mansfield 5 W	United States	Record daily precipitation	43.2 mm (1.7 in)	51 of 100 (Notable)
Herzberg	Germany	Record daily precipitation	36.4 mm (1.4 in)	50 of 100 (Notable)
Wapato	United States	Record daily precipitation	26.7 mm (1.1 in)	50 of 100 (Notable)
Schierke	Germany	Record daily precipitation	45.0 mm (1.8 in)	49 of 100 (Notable)
Campina Verde	Brazil	Record daily precipitation	65.0 mm (2.6 in)	47 of 100 (Notable)
Middletown 2 NW	United States	Record low maximum temperature	17.2 C (63.0 F)	47 of 100 (Notable)
Ponce 4 E	Puerto Rico [United States]	Record high minimum temperature	26.1 C (79.0 F)	44 of 100 (Notable)
S Haven	United States	Record daily precipitation	72.6 mm (2.9 in)	44 of 100 (Notable)
Clausthal-Zellerfeld	Germany	Record daily precipitation	68.4 mm (2.7 in)	43 of 100 (Notable)
Sussex 1 NW	United States	Record low maximum temperature	17.2 C (63.0 F)	43 of 100 (Notable)
Monte Azul Paulista	Brazil	Record daily precipitation	50.2 mm (2.0 in)	42 of 100 (Notable)
Braunlage	Germany	Record daily precipitation	46.6 mm (1.8 in)	42 of 100 (Notable)
Waverly	United States	Record daily precipitation	54.1 mm (2.1 in)	42 of 100 (Notable)
Bloserville 1 N	United States	Record low maximum temperature	15.0 C (59.0 F)	42 of 100 (Notable)
Yakima AP	United States	Record daily precipitation	41.7 mm (1.6 in)	42 of 100 (Notable)
Brocken	Germany	Record daily precipitation	55.6 mm (2.2 in)	41 of 100 (Notable)
Alva 1W	United States	Record daily precipitation	50.3 mm (2.0 in)	41 of 100 (Notable)
Bickleton	United States	Record daily precipitation	29.5 mm (1.2 in)	41 of 100 (Notable)
Moxee City 10 E	United States	Record daily precipitation	37.6 mm (1.5 in)	41 of 100 (Notable)
Asheville AP	United States	Record daily precipitation	109.7 mm (4.3 in)	41 of 100 (Notable)
Klaipeda	Lithuania	Record daily precipitation	40.2 mm (1.6 in)	40 of 100 (Notable)
Hatch	United States	Record low maximum temperature	23.3 C (73.9 F)	40 of 100 (Notable)
Brookings 2 NE	United States	Record low maximum temperature	16.1 C (61.0 F)	40 of 100 (Notable)
Mauston 1 SE	United States	Record low maximum temperature	17.8 C (64.0 F)	40 of 100 (Notable)
Mosby 4 ENE	United States	Record daily precipitation	30.2 mm (1.2 in)	39 of 100 (Notable)
Inverloch	Australia	Record daily precipitation	25.2 mm (1.0 in)	38 of 100 (Notable)
Silute	Lithuania	Record daily precipitation	57.3 mm (2.3 in)	38 of 100 (Notable)
Newton	United States	Record low maximum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Hawley 1 E	United States	Record low maximum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Riolandia	Brazil	Record daily precipitation	40.7 mm (1.6 in)	37 of 100 (Notable)
Iowa City	United States	Record low maximum temperature	22.2 C (72.0 F)	37 of 100 (Notable)
Williamstown	United States	Record daily precipitation	63.8 mm (2.5 in)	37 of 100 (Notable)
Charlotteburg Rsvr	United States	Record low maximum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Port Jervis	United States	Record low maximum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Lima Wwtp	United States	Record daily precipitation	60.2 mm (2.4 in)	37 of 100 (Notable)
Landsburg	United States	Record daily precipitation	38.4 mm (1.5 in)	37 of 100 (Notable)
Botafogo (Cpef)	Brazil	Record daily precipitation	44.2 mm (1.7 in)	36 of 100 (Notable)
Madison	United States	Record high maximum temperature	37.8 C (100.0 F)	36 of 100 (Notable)
Saint Johns	United States	Record low maximum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
University	United States	Record high maximum temperature	37.2 C (99.0 F)	36 of 100 (Notable)
Somerville 4 NW	United States	Record low maximum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
Capitan	United States	Record low maximum temperature	20.0 C (68.0 F)	36 of 100 (Notable)
W Manchester 3 WSW	United States	Record daily precipitation	25.7 mm (1.0 in)	36 of 100 (Notable)
Shaoguan	China	Record high minimum temperature	29.4 C (84.9 F)	35 of 100 (Notable)
Tortosa - Observatorio del Ebr	Spain	Record high minimum temperature	23.7 C (74.7 F)	35 of 100 (Notable)
Kentfield	United States	Record high minimum temperature	15.0 C (59.0 F)	35 of 100 (Notable)
Cedar Rapids #1	United States	Record low maximum temperature	20.6 C (69.1 F)	35 of 100 (Notable)

Counts by Type and Timescale

910 records

Records set or tied on 21 August 1990 by type: Highest daily maximum 114, Lowest daily maximum 294, Highest daily minimum 126, Lowest daily minimum 85, Heaviest daily rainfall 291.

Records on 21 August 1990 by type
Record type	Records
Highest daily maximum	114
Lowest daily maximum	294
Highest daily minimum	126
Lowest daily minimum	85
Heaviest daily rainfall	291
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1990 by timescale: all-time 4, monthly 39, daily 867.

How Much Records Were Beaten By

689 broken records

Margins by which the 689 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 54.6. Ties are not counted.

Top 20 by Significance

21 August 1990

Top 20 records on 21 August 1990 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1990	Arlington, US	monthly rain	42.9 mm (1.7 in)	29.2 mm (1.1 in)	56 years	75 of 100 (Major)
21 August 1990	Wasco, US	monthly rain	34.5 mm (1.4 in)	19.3 mm (0.8 in)	21 years	64 of 100 (Major)
21 August 1990	Ellensburg, US	monthly rain	40.6 mm (1.6 in)	16.5 mm (0.6 in)	15 years	63 of 100 (Major)
21 August 1990	Lind 3 NE, US	monthly rain	33.3 mm (1.3 in)	13.5 mm (0.5 in)	31 years	62 of 100 (Major)
21 August 1990	Pontal, BR	daily rain	46.3 mm (1.8 in)	41.8 mm (1.6 in)	39 years	56 of 100 (Notable)
21 August 1990	Leavenworth 3 S, US	daily rain	34.8 mm (1.4 in)	31.8 mm (1.3 in)	29 years	55 of 100 (Notable)
21 August 1990	Blumenau (Pcd), BR	daily rain	66.7 mm (2.6 in)	54.5 mm (2.1 in)	36 years	54 of 100 (Notable)
21 August 1990	Delphi 2 N, US	daily rain	67.1 mm (2.6 in)	29.8 mm (1.2 in)	75 years	54 of 100 (Notable)
21 August 1990	Mikkalo 6 W, US	monthly rain	32.8 mm (1.3 in)	13.0 mm (0.5 in)	28 years	54 of 100 (Notable)
21 August 1990	Sotchi, RU	daily rain	77.6 mm (3.1 in)	27.1 mm (1.1 in)	110 years	53 of 100 (Notable)
21 August 1990	Ulken Nary, KZ	daily rain	30.0 mm (1.2 in)	17.6 mm (0.7 in)	48 years	52 of 100 (Notable)
21 August 1990	Chardon, US	daily rain	81.3 mm (3.2 in)	54.6 mm (2.1 in)	28 years	52 of 100 (Notable)
21 August 1990	Cle Elum, US	daily rain	47.0 mm (1.9 in)	37.1 mm (1.5 in)	11 years	52 of 100 (Notable)
21 August 1990	Mansfield 5 W, US	daily rain	43.2 mm (1.7 in)	20.3 mm (0.8 in)	89 years	51 of 100 (Notable)
21 August 1990	Herzberg, DE	daily rain	36.4 mm (1.4 in)	17.3 mm (0.7 in)	53 years	50 of 100 (Notable)
21 August 1990	Wapato, US	daily rain	26.7 mm (1.1 in)	24.9 mm (1.0 in)	11 years	50 of 100 (Notable)
21 August 1990	Schierke, DE	daily rain	45.0 mm (1.8 in)	22.2 mm (0.9 in)	20 years	49 of 100 (Notable)
21 August 1990	Campina Verde, BR	monthly rain	65.0 mm (2.6 in)	18.0 mm (0.7 in)	42 years	47 of 100 (Notable)
21 August 1990	Middletown 2 NW, US	daily low max	17.2 C (63.0 F)	3.9 C (7.0 F)	89 years	47 of 100 (Notable)
21 August 1990	Ponce 4 E, PR	daily high min	26.1 C (79.0 F)	1.1 C (2.0 F)	88 years	44 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 1990

Records set or tied on this calendar date in each year from 1800 to 1990. 1990 had 910 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 1990-08-21: 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	574
10 to 20	72
20 to 30	32
30 to 40	7
40 to 50	2
50 to 60	2