Weather Records on 21 August 2011

1,022 weather records were set or tied worldwide on 21 August 2011. Highest significance: Golden, US.

Key Facts for 21 August 2011

On 21 August 2011, 1,022 weather records were set or tied at long-record stations worldwide.
698 were record highs and 161 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 16 monthly and 1,004 daily.
Golden set a daily record precipitation of 58.4 mm (2.3 in) on 21 August 2011.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 446 records.

Record Map

1,022 stations

1,022 station records on 21 August 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Golden	United States	Record daily precipitation	58.4 mm (2.3 in)	66 of 100 (Major)
Westermarkelsdorf/Fehmarn	Germany	Record daily precipitation	39.6 mm (1.6 in)	61 of 100 (Major)
Los Alamos	United States	Record daily precipitation	48.0 mm (1.9 in)	61 of 100 (Major)
Ciudad Aleman	Mexico	Record daily precipitation	199.9 mm (7.9 in)	58 of 100 (Notable)
Alvarado (Dge)	Mexico	Record daily precipitation	175.8 mm (6.9 in)	54 of 100 (Notable)
Hopkinsville	United States	Record daily precipitation	45.7 mm (1.8 in)	54 of 100 (Notable)
Mountainair	United States	Record daily precipitation	51.8 mm (2.0 in)	54 of 100 (Notable)
Santa Fe 2	United States	Record daily precipitation	40.6 mm (1.6 in)	54 of 100 (Notable)
Kolomna	Russia	Record daily precipitation	32.8 mm (1.3 in)	49 of 100 (Notable)
Roy	United States	Record daily precipitation	36.8 mm (1.4 in)	48 of 100 (Notable)
Willawarrin (Denleigh)	Australia	Record daily precipitation	44.6 mm (1.8 in)	46 of 100 (Notable)
Aceituna Wtp	Puerto Rico [United States]	Record daily precipitation	101.6 mm (4.0 in)	46 of 100 (Notable)
Cape Leeuwin	Australia	Record high minimum temperature	16.6 C (61.9 F)	45 of 100 (Notable)
Brighton Dam	United States	Record daily precipitation	66.0 mm (2.6 in)	45 of 100 (Notable)
Hillsboro	United States	Record high minimum temperature	28.3 C (82.9 F)	45 of 100 (Notable)
Manoa 712.1	United States	Record daily precipitation	36.1 mm (1.4 in)	45 of 100 (Notable)
Atzalan	Mexico	Record daily precipitation	119.9 mm (4.7 in)	44 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record high maximum temperature	20.5 C (68.9 F)	44 of 100 (Notable)
Bonham 3NNE	United States	Record high minimum temperature	27.8 C (82.0 F)	44 of 100 (Notable)
Cuero	United States	Record high maximum temperature	41.1 C (106.0 F)	44 of 100 (Notable)
Upper Orara (Dairyville)	Australia	Record daily precipitation	47.0 mm (1.9 in)	43 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record high minimum temperature	12.2 C (54.0 F)	43 of 100 (Notable)
Sulphur Springs	United States	Record high maximum temperature	42.2 C (108.0 F)	43 of 100 (Notable)
Bloomfield 3 SE	United States	Record high minimum temperature	21.1 C (70.0 F)	42 of 100 (Notable)
San Gil	Mexico	Record low minimum temperature	2.8 C (37.0 F)	41 of 100 (Notable)
Nashville	United States	Record high maximum temperature	42.8 C (109.0 F)	41 of 100 (Notable)
Wills Pt	United States	Record high minimum temperature	27.8 C (82.0 F)	41 of 100 (Notable)
Hobart Muni AP	United States	Record high minimum temperature	27.2 C (81.0 F)	41 of 100 (Notable)
La Angostura	Mexico	Record low maximum temperature	28.9 C (84.0 F)	40 of 100 (Notable)
Corozal Substn	Puerto Rico [United States]	Record low maximum temperature	26.7 C (80.1 F)	40 of 100 (Notable)
Yamba Pilot Station	Australia	Record daily precipitation	63.8 mm (2.5 in)	39 of 100 (Notable)
Yeneka	Mexico	Record high minimum temperature	31.7 C (89.1 F)	39 of 100 (Notable)
Simojovel (Dge)	Mexico	Record daily precipitation	104.9 mm (4.1 in)	39 of 100 (Notable)
Martinez de la Torre (Dge)	Mexico	Record daily precipitation	91.2 mm (3.6 in)	39 of 100 (Notable)
San Sebastian - Igueldo	Spain	Record high maximum temperature	37.1 C (98.8 F)	39 of 100 (Notable)
Minden	United States	Record high maximum temperature	41.1 C (106.0 F)	39 of 100 (Notable)
Salmon Gums Res.STN.	Australia	Record high maximum temperature	30.8 C (87.4 F)	38 of 100 (Notable)
Thomasville	United States	Record high minimum temperature	25.0 C (77.0 F)	38 of 100 (Notable)
Princeton 1 SE	United States	Record daily precipitation	73.4 mm (2.9 in)	38 of 100 (Notable)
Denton 2 SE	United States	Record high maximum temperature	41.7 C (107.1 F)	38 of 100 (Notable)
Denton 2 SE	United States	Record high minimum temperature	28.9 C (84.0 F)	38 of 100 (Notable)
Plainview	United States	Record high minimum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Pittsfield Muni AP	United States	Record daily precipitation	48.8 mm (1.9 in)	38 of 100 (Notable)
Noumea Nf	New Caledonia [France]	Record daily precipitation	33.0 mm (1.3 in)	37 of 100 (Notable)
Bastrop	United States	Record high minimum temperature	25.0 C (77.0 F)	37 of 100 (Notable)
Okmulgee Wtr Wks	United States	Record high minimum temperature	26.7 C (80.1 F)	37 of 100 (Notable)
Paris	United States	Record high maximum temperature	42.8 C (109.0 F)	37 of 100 (Notable)
Wichita Falls Muni AP	United States	Record high minimum temperature	28.3 C (82.9 F)	37 of 100 (Notable)
Saentis	Switzerland	Record high minimum temperature	11.6 C (52.9 F)	36 of 100 (Notable)
White Lake	United States	Record low maximum temperature	20.6 C (69.1 F)	36 of 100 (Notable)
Gilmer 4 WNW	United States	Record high maximum temperature	42.8 C (109.0 F)	36 of 100 (Notable)
Hereford	United States	Record high minimum temperature	21.1 C (70.0 F)	36 of 100 (Notable)
Chamita	United States	Record daily precipitation	33.0 mm (1.3 in)	36 of 100 (Notable)
Perth Airport	Australia	Record high maximum temperature	27.0 C (80.6 F)	35 of 100 (Notable)
Dijon-Longvic	France	Record high maximum temperature	32.3 C (90.1 F)	35 of 100 (Notable)
Clermont-Ferrand	France	Record high minimum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Zugspitze	Germany	Record high maximum temperature	14.9 C (58.8 F)	35 of 100 (Notable)
Saentis	Switzerland	Record high maximum temperature	17.9 C (64.2 F)	35 of 100 (Notable)
Cobb	United States	Record daily precipitation	64.0 mm (2.5 in)	35 of 100 (Notable)
Antlers	United States	Record high maximum temperature	41.7 C (107.1 F)	35 of 100 (Notable)

Counts by Type and Timescale

1,022 records

Records set or tied on 21 August 2011 by type: Highest daily maximum 392, Lowest daily maximum 93, Highest daily minimum 306, Lowest daily minimum 68, Heaviest daily rainfall 163.

Records on 21 August 2011 by type
Record type	Records
Highest daily maximum	392
Lowest daily maximum	93
Highest daily minimum	306
Lowest daily minimum	68
Heaviest daily rainfall	163
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 2011 by timescale: all-time 2, monthly 16, daily 1,004.

How Much Records Were Beaten By

744 broken records

Margins by which the 744 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 119.6. Ties are not counted.

Top 20 by Significance

21 August 2011

Top 20 records on 21 August 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 2011	Golden, US	daily rain	58.4 mm (2.3 in)	43.2 mm (1.7 in)	53 years	66 of 100 (Major)
21 August 2011	Westermarkelsdorf/Fehmarn, DE	daily rain	39.6 mm (1.6 in)	28.2 mm (1.1 in)	49 years	61 of 100 (Major)
21 August 2011	Los Alamos, US	daily rain	48.0 mm (1.9 in)	22.6 mm (0.9 in)	78 years	61 of 100 (Major)
21 August 2011	Ciudad Aleman, MX	daily rain	199.9 mm (7.9 in)	119.6 mm (4.7 in)	42 years	58 of 100 (Notable)
21 August 2011	Alvarado (Dge), MX	daily rain	175.8 mm (6.9 in)	97.3 mm (3.8 in)	49 years	54 of 100 (Notable)
21 August 2011	Hopkinsville, US	daily rain	45.7 mm (1.8 in)	20.6 mm (0.8 in)	111 years	54 of 100 (Notable)
21 August 2011	Mountainair, US	daily rain	51.8 mm (2.0 in)	14.7 mm (0.6 in)	97 years	54 of 100 (Notable)
21 August 2011	Santa Fe 2, US	daily rain	40.6 mm (1.6 in)	34.2 mm (1.3 in)	33 years	54 of 100 (Notable)
21 August 2011	Kolomna, RU	daily rain	32.8 mm (1.3 in)	18.8 mm (0.7 in)	48 years	49 of 100 (Notable)
21 August 2011	Roy, US	daily rain	36.8 mm (1.4 in)	21.6 mm (0.9 in)	52 years	48 of 100 (Notable)
21 August 2011	Willawarrin (Denleigh), AU	daily rain	44.6 mm (1.8 in)	37.5 mm (1.5 in)	41 years	46 of 100 (Notable)
21 August 2011	Aceituna Wtp, PR	daily rain	101.6 mm (4.0 in)	65.0 mm (2.6 in)	44 years	46 of 100 (Notable)
21 August 2011	Cape Leeuwin, AU	daily high min	16.6 C (61.9 F)	2.4 C (4.3 F)	76 years	45 of 100 (Notable)
21 August 2011	Brighton Dam, US	daily rain	66.0 mm (2.6 in)	40.3 mm (1.6 in)	32 years	45 of 100 (Notable)
21 August 2011	Hillsboro, US	daily high min	28.3 C (82.9 F)	2.7 C (4.9 F)	76 years	45 of 100 (Notable)
21 August 2011	Manoa 712.1, US	daily rain	36.1 mm (1.4 in)	10.2 mm (0.4 in)	81 years	45 of 100 (Notable)
21 August 2011	Atzalan, MX	daily rain	119.9 mm (4.7 in)	50.0 mm (2.0 in)	29 years	44 of 100 (Notable)
21 August 2011	Col du Grand St-Bernard, CH	daily high max	20.5 C (68.9 F)	1.9 C (3.4 F)	112 years	44 of 100 (Notable)
21 August 2011	Bonham 3NNE, US	daily high min	27.8 C (82.0 F)	2.2 C (4.0 F)	86 years	44 of 100 (Notable)
21 August 2011	Cuero, US	daily high max	41.1 C (106.0 F)	1.1 C (2.0 F)	100 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 2011

Records set or tied on this calendar date in each year from 1800 to 2011. 2011 had 1,022 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 2011-08-21: 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 2026-10-13 (13 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	708
20 to 40	25
40 to 60	8
60 to 80	1
80 to 100	1
100 to 120	1