Weather Records on 21 August 2010

1,155 weather records were set or tied worldwide on 21 August 2010. Highest significance: White Hall 1 E, US.

Key Facts for 21 August 2010

On 21 August 2010, 1,155 weather records were set or tied at long-record stations worldwide.
767 were record highs and 169 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 28 monthly and 1,122 daily.
White Hall 1 E set a daily record precipitation of 94.0 mm (3.7 in) on 21 August 2010.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 446 records.

Record Map

1,155 stations

1,155 station records on 21 August 2010 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 2010: highest significance records shown on the map
Station	Country	Type	Value	Significance
White Hall 1 E	United States	Record daily precipitation	94.0 mm (3.7 in)	78 of 100 (Major)
Dahlonega 4WSW	United States	Record daily precipitation	102.9 mm (4.1 in)	74 of 100 (Major)
Broadleigh Downs	Australia	Record daily precipitation	49.6 mm (2.0 in)	58 of 100 (Notable)
Kewaunee	United States	Record daily precipitation	66.0 mm (2.6 in)	58 of 100 (Notable)
Casterton (Warrock)	Australia	Record daily precipitation	39.0 mm (1.5 in)	57 of 100 (Notable)
Bronte Heights	Australia	Record daily precipitation	30.2 mm (1.2 in)	55 of 100 (Notable)
Skegness	United Kingdom	Record daily precipitation	35.0 mm (1.4 in)	54 of 100 (Notable)
Pattonsburg 2S	United States	Record daily precipitation	36.8 mm (1.4 in)	53 of 100 (Notable)
Moweaqua 2S	United States	Record daily precipitation	69.1 mm (2.7 in)	52 of 100 (Notable)
Rancho Nuevo	Mexico	Record daily precipitation	130.0 mm (5.1 in)	51 of 100 (Notable)
Cassville 1 NE	United States	Record high minimum temperature	26.1 C (79.0 F)	51 of 100 (Notable)
Minocqua	United States	Record daily precipitation	68.6 mm (2.7 in)	51 of 100 (Notable)
Morrisonville	United States	Record daily precipitation	73.7 mm (2.9 in)	50 of 100 (Notable)
Kincaid 3W	United States	Record daily precipitation	76.5 mm (3.0 in)	49 of 100 (Notable)
Frankfort 2NE	United States	Record daily precipitation	46.2 mm (1.8 in)	49 of 100 (Notable)
Madison	United States	Record high minimum temperature	25.6 C (78.1 F)	48 of 100 (Notable)
Kalkaska	United States	Record daily precipitation	49.5 mm (1.9 in)	48 of 100 (Notable)
Freedom	United States	Record daily precipitation	97.5 mm (3.8 in)	48 of 100 (Notable)
Tarraleah Village	Australia	Record daily precipitation	47.6 mm (1.9 in)	47 of 100 (Notable)
Pamban	India	Record daily precipitation	45.0 mm (1.8 in)	46 of 100 (Notable)
Rison	United States	Record high minimum temperature	25.6 C (78.1 F)	46 of 100 (Notable)
Wynne	United States	Record high minimum temperature	26.1 C (79.0 F)	46 of 100 (Notable)
Horton	United States	Record daily precipitation	50.8 mm (2.0 in)	46 of 100 (Notable)
Mammoth Spring	United States	Record high minimum temperature	23.9 C (75.0 F)	45 of 100 (Notable)
Glen St Mary 1 W	United States	Record high minimum temperature	24.4 C (75.9 F)	45 of 100 (Notable)
Louisville	United States	Record high minimum temperature	24.4 C (75.9 F)	45 of 100 (Notable)
Osterley	Australia	Record daily precipitation	27.2 mm (1.1 in)	43 of 100 (Notable)
Kirov	Russia	Record low minimum temperature	2.4 C (36.3 F)	43 of 100 (Notable)
Rothamsted	United Kingdom	Record high minimum temperature	18.1 C (64.6 F)	43 of 100 (Notable)
New Franklin 1W	United States	Record daily precipitation	83.3 mm (3.3 in)	43 of 100 (Notable)
Melstone	United States	Record high maximum temperature	41.1 C (106.0 F)	43 of 100 (Notable)
Brinkley	United States	Record high minimum temperature	25.6 C (78.1 F)	42 of 100 (Notable)
Eureka Springs 3 WNW	United States	Record high minimum temperature	27.8 C (82.0 F)	42 of 100 (Notable)
Jonesboro 3 SSE	United States	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Newport	United States	Record high minimum temperature	25.6 C (78.1 F)	42 of 100 (Notable)
Douglas	United States	Record high minimum temperature	24.4 C (75.9 F)	42 of 100 (Notable)
Hazlehurst	United States	Record daily precipitation	58.4 mm (2.3 in)	42 of 100 (Notable)
State UNIV	United States	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Knoxville AP	United States	Record daily precipitation	30.5 mm (1.2 in)	42 of 100 (Notable)
Tyler Pounds Fld	United States	Record high minimum temperature	26.1 C (79.0 F)	42 of 100 (Notable)
Cumming 2N	United States	Record daily precipitation	71.1 mm (2.8 in)	41 of 100 (Notable)
Driggs	United States	Record high minimum temperature	15.6 C (60.1 F)	41 of 100 (Notable)
Virden	United States	Record daily precipitation	91.7 mm (3.6 in)	41 of 100 (Notable)
Valley Park	United States	Record daily precipitation	58.4 mm (2.3 in)	41 of 100 (Notable)
Bowie	United States	Record high minimum temperature	26.1 C (79.0 F)	41 of 100 (Notable)
Kii-Kahuku 911	United States	Record low maximum temperature	23.3 C (73.9 F)	41 of 100 (Notable)
Troicko-Pecherskoe	Russia	Record low minimum temperature	-1.4 C (29.5 F)	40 of 100 (Notable)
Malvern	United States	Record high minimum temperature	23.9 C (75.0 F)	40 of 100 (Notable)
Du Quoin 4 SE	United States	Record daily precipitation	37.3 mm (1.5 in)	40 of 100 (Notable)
Mt Vernon 3 NE	United States	Record daily precipitation	53.3 mm (2.1 in)	40 of 100 (Notable)
Saluda	United States	Record high minimum temperature	24.4 C (75.9 F)	40 of 100 (Notable)
Huntsville	United States	Record high minimum temperature	26.7 C (80.1 F)	40 of 100 (Notable)
Wytheville	United States	Record high minimum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Ft Myers Page Fld AP	United States	Record high maximum temperature	35.6 C (96.1 F)	40 of 100 (Notable)
Nanchong	China	Record daily precipitation	91.7 mm (3.6 in)	39 of 100 (Notable)
Gyshgy	Turkmenistan	Record high maximum temperature	41.1 C (106.0 F)	39 of 100 (Notable)
Alicia 2 NNE	United States	Record high minimum temperature	26.1 C (79.0 F)	39 of 100 (Notable)
Rome	United States	Record high minimum temperature	24.4 C (75.9 F)	39 of 100 (Notable)
Highlands	United States	Record daily precipitation	61.7 mm (2.4 in)	39 of 100 (Notable)
Elat	Israel	Record high minimum temperature	32.5 C (90.5 F)	38 of 100 (Notable)

Counts by Type and Timescale

1,155 records

Records set or tied on 21 August 2010 by type: Highest daily maximum 231, Lowest daily maximum 82, Highest daily minimum 536, Lowest daily minimum 87, Heaviest daily rainfall 219.

Records on 21 August 2010 by type
Record type	Records
Highest daily maximum	231
Lowest daily maximum	82
Highest daily minimum	536
Lowest daily minimum	87
Heaviest daily rainfall	219
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 2010 by timescale: all-time 5, monthly 28, daily 1,122.

How Much Records Were Beaten By

844 broken records

Margins by which the 844 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 103.1. Ties are not counted.

Top 20 by Significance

21 August 2010

Top 20 records on 21 August 2010 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 2010	White Hall 1 E, US	daily rain	94.0 mm (3.7 in)	55.6 mm (2.2 in)	95 years	78 of 100 (Major)
21 August 2010	Dahlonega 4WSW, US	daily rain	102.9 mm (4.1 in)	55.1 mm (2.2 in)	108 years	74 of 100 (Major)
21 August 2010	Broadleigh Downs, AU	daily rain	49.6 mm (2.0 in)	49.6 mm (2.0 in)	47 years	58 of 100 (Notable)
21 August 2010	Kewaunee, US	daily rain	66.0 mm (2.6 in)	36.8 mm (1.4 in)	64 years	58 of 100 (Notable)
21 August 2010	Casterton (Warrock), AU	daily rain	39.0 mm (1.5 in)	25.8 mm (1.0 in)	25 years	57 of 100 (Notable)
21 August 2010	Bronte Heights, AU	daily rain	30.2 mm (1.2 in)	9.9 mm (0.39 in)	100 years	55 of 100 (Notable)
21 August 2010	Skegness, GB	daily rain	35.0 mm (1.4 in)	10.1 mm (0.4 in)	96 years	54 of 100 (Notable)
21 August 2010	Pattonsburg 2S, US	daily rain	36.8 mm (1.4 in)	20.3 mm (0.8 in)	99 years	53 of 100 (Notable)
21 August 2010	Moweaqua 2S, US	daily rain	69.1 mm (2.7 in)	51.3 mm (2.0 in)	32 years	52 of 100 (Notable)
21 August 2010	Rancho Nuevo, MX	daily rain	130.0 mm (5.1 in)	103.1 mm (4.1 in)	28 years	51 of 100 (Notable)
21 August 2010	Cassville 1 NE, US	monthly high min	26.1 C (79.0 F)	1.1 C (2.0 F)	94 years	51 of 100 (Notable)
21 August 2010	Minocqua, US	daily rain	68.6 mm (2.7 in)	20.3 mm (0.8 in)	85 years	51 of 100 (Notable)
21 August 2010	Morrisonville, US	daily rain	73.7 mm (2.9 in)	61.5 mm (2.4 in)	16 years	50 of 100 (Notable)
21 August 2010	Kincaid 3W, US	daily rain	76.5 mm (3.0 in)	49.6 mm (2.0 in)	31 years	49 of 100 (Notable)
21 August 2010	Frankfort 2NE, US	daily rain	46.2 mm (1.8 in)	15.7 mm (0.6 in)	91 years	49 of 100 (Notable)
21 August 2010	Madison, US	daily high min	25.6 C (78.1 F)	1.7 C (3.1 F)	89 years	48 of 100 (Notable)
21 August 2010	Kalkaska, US	daily rain	49.5 mm (1.9 in)	28.2 mm (1.1 in)	51 years	48 of 100 (Notable)
21 August 2010	Freedom, US	daily rain	97.5 mm (3.8 in)	67.0 mm (2.6 in)	20 years	48 of 100 (Notable)
21 August 2010	Tarraleah Village, AU	daily rain	47.6 mm (1.9 in)	27.6 mm (1.1 in)	8 years	47 of 100 (Notable)
21 August 2010	Pamban, IN	daily rain	45.0 mm (1.8 in)	21.1 mm (0.8 in)	60 years	46 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 2010

Records set or tied on this calendar date in each year from 1800 to 2010. 2010 had 1,155 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 2010-08-21: 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 20	796
20 to 40	38
40 to 60	6
60 to 80	3
80 to 100	0
100 to 120	1