Weather Records on 21 August 2021

767 weather records were set or tied worldwide on 21 August 2021. Highest significance: Lankaran, AZ.

Key Facts for 21 August 2021

On 21 August 2021, 767 weather records were set or tied at long-record stations worldwide.
261 were record highs and 273 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 18 monthly and 746 daily.
Lankaran set a daily record precipitation of 99.6 mm (3.9 in) on 21 August 2021.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 448 records.

Record Map

767 stations

767 station records on 21 August 2021 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 2021: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lankaran	Azerbaijan	Record daily precipitation	99.6 mm (3.9 in)	77 of 100 (Major)
Dickson	United States	Record daily precipitation	294.6 mm (11.6 in)	73 of 100 (Major)
Joure	Netherlands	Record daily precipitation	55.2 mm (2.2 in)	64 of 100 (Major)
Drake 9 NE	United States	Record daily precipitation	68.8 mm (2.7 in)	61 of 100 (Major)
Guba	Azerbaijan	Record daily precipitation	99.1 mm (3.9 in)	60 of 100 (Major)
Upham 3 N	United States	Record daily precipitation	76.7 mm (3.0 in)	60 of 100 (Major)
Viljujsk	Russia	Record daily precipitation	54.1 mm (2.1 in)	59 of 100 (Notable)
Rugby	United States	Record daily precipitation	91.4 mm (3.6 in)	57 of 100 (Notable)
Little Warm	United States	Record daily precipitation	27.9 mm (1.1 in)	56 of 100 (Notable)
Kaneohe Bay MCAS	United States	Record low maximum temperature	23.9 C (75.0 F)	52 of 100 (Notable)
Eskdalemuir	United Kingdom	Record daily precipitation	37.0 mm (1.5 in)	49 of 100 (Notable)
Parley's Summit	United States	Record daily precipitation	35.6 mm (1.4 in)	48 of 100 (Notable)
Ufa	Russia	Record high maximum temperature	38.4 C (101.1 F)	47 of 100 (Notable)
Vernal	United States	Record low maximum temperature	21.1 C (70.0 F)	47 of 100 (Notable)
Snake Rvr	United States	Record low maximum temperature	11.1 C (52.0 F)	47 of 100 (Notable)
Chalk Creek #2	United States	Record daily precipitation	27.9 mm (1.1 in)	46 of 100 (Notable)
Chalk Creek #1	United States	Record daily precipitation	33.0 mm (1.3 in)	45 of 100 (Notable)
Banfield Mountain	United States	Record daily precipitation	27.9 mm (1.1 in)	44 of 100 (Notable)
West Terschelling	Netherlands	Record daily precipitation	30.5 mm (1.2 in)	43 of 100 (Notable)
Ust-Maja	Russia	Record high maximum temperature	31.5 C (88.7 F)	43 of 100 (Notable)
Plant City	United States	Record high maximum temperature	37.8 C (100.0 F)	43 of 100 (Notable)
Bowman	United States	Record low maximum temperature	14.4 C (57.9 F)	43 of 100 (Notable)
Ny City Cntrl Park	United States	Record daily precipitation	113.0 mm (4.4 in)	43 of 100 (Notable)
Tampico Tamps	Mexico	Record daily precipitation	87.1 mm (3.4 in)	42 of 100 (Notable)
Kirov	Russia	Record high minimum temperature	21.8 C (71.2 F)	42 of 100 (Notable)
Aksakovo	Russia	Record high minimum temperature	23.5 C (74.3 F)	42 of 100 (Notable)
Cooperstown	United States	Record high minimum temperature	20.6 C (69.1 F)	42 of 100 (Notable)
Hardy	United States	Record high minimum temperature	23.3 C (73.9 F)	41 of 100 (Notable)
Palisade	United States	Record low minimum temperature	9.4 C (48.9 F)	41 of 100 (Notable)
Durham	United States	Record high minimum temperature	21.1 C (70.0 F)	41 of 100 (Notable)
Thompson Welcome Ctr	United States	Record low maximum temperature	21.1 C (70.0 F)	41 of 100 (Notable)
Yellowstone Park Mammoth	United States	Record low maximum temperature	15.6 C (60.1 F)	41 of 100 (Notable)
Kustanai	Kazakhstan	Record high maximum temperature	34.7 C (94.5 F)	40 of 100 (Notable)
Uralsk	Kazakhstan	Record high maximum temperature	41.5 C (106.7 F)	40 of 100 (Notable)
Delhi 2 SE	United States	Record daily precipitation	45.5 mm (1.8 in)	40 of 100 (Notable)
Columbia 3 WNW	United States	Record daily precipitation	80.5 mm (3.2 in)	40 of 100 (Notable)
White Sulphur Springs	United States	Record daily precipitation	33.5 mm (1.3 in)	40 of 100 (Notable)
Lemmer (Gemaal Buma)	Netherlands	Record daily precipitation	28.7 mm (1.1 in)	39 of 100 (Notable)
Tobolsk	Russia	Record high maximum temperature	32.9 C (91.2 F)	39 of 100 (Notable)
Sterlitamak	Russia	Record high maximum temperature	39.0 C (102.2 F)	39 of 100 (Notable)
Murray	United States	Record daily precipitation	51.3 mm (2.0 in)	39 of 100 (Notable)
Walker	United States	Record daily precipitation	75.2 mm (3.0 in)	39 of 100 (Notable)
Perm	Russia	Record high minimum temperature	20.3 C (68.5 F)	37 of 100 (Notable)
Telluride 4WNW	United States	Record low maximum temperature	13.3 C (55.9 F)	37 of 100 (Notable)
Greenville Muni AP	United States	Record high minimum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Cass Lake	United States	Record daily precipitation	46.2 mm (1.8 in)	37 of 100 (Notable)
Brainerd	United States	Record daily precipitation	49.3 mm (1.9 in)	36 of 100 (Notable)
Palisade	United States	Record low maximum temperature	23.3 C (73.9 F)	35 of 100 (Notable)
Priest Rvr Exp STN	United States	Record daily precipitation	25.4 mm (1.0 in)	35 of 100 (Notable)
Sarapul	Russia	Record high minimum temperature	19.9 C (67.8 F)	34 of 100 (Routine)
Tanguj	Russia	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Inman 5SW	United States	Record daily precipitation	49.5 mm (1.9 in)	34 of 100 (Routine)
Lake Metigoshe Sp	United States	Record daily precipitation	86.4 mm (3.4 in)	34 of 100 (Routine)
Daytona Beach Intl AP	United States	Record high maximum temperature	36.1 C (97.0 F)	34 of 100 (Routine)
Heeg	Netherlands	Record daily precipitation	32.4 mm (1.3 in)	33 of 100 (Routine)
Oost Vlieland	Netherlands	Record daily precipitation	28.9 mm (1.1 in)	33 of 100 (Routine)
Joskar-Ola	Russia	Record high maximum temperature	34.8 C (94.6 F)	33 of 100 (Routine)
Chara	Russia	Record daily precipitation	43.9 mm (1.7 in)	33 of 100 (Routine)
Turkmen-Bashi	Turkmenistan	Record high maximum temperature	40.6 C (105.1 F)	33 of 100 (Routine)
Moffit 3 SE	United States	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)

Counts by Type and Timescale

767 records

Records set or tied on 21 August 2021 by type: Highest daily maximum 96, Lowest daily maximum 164, Highest daily minimum 165, Lowest daily minimum 109, Heaviest daily rainfall 233.

Records on 21 August 2021 by type
Record type	Records
Highest daily maximum	96
Lowest daily maximum	164
Highest daily minimum	165
Lowest daily minimum	109
Heaviest daily rainfall	233
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 2021 by timescale: all-time 3, monthly 18, daily 746.

How Much Records Were Beaten By

620 broken records

Margins by which the 620 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 109.2. Ties are not counted.

Top 20 by Significance

21 August 2021

Top 20 records on 21 August 2021 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 2021	Lankaran, AZ	daily rain	99.6 mm (3.9 in)	58.4 mm (2.3 in)	112 years	77 of 100 (Major)
21 August 2021	Dickson, US	all-time rain	294.6 mm (11.6 in)	109.2 mm (4.3 in)	11 years	73 of 100 (Major)
21 August 2021	Joure, NL	daily rain	55.2 mm (2.2 in)	32.0 mm (1.3 in)	58 years	64 of 100 (Major)
21 August 2021	Drake 9 NE, US	daily rain	68.8 mm (2.7 in)	45.9 mm (1.8 in)	55 years	61 of 100 (Major)
21 August 2021	Guba, AZ	daily rain	99.1 mm (3.9 in)	85.1 mm (3.4 in)	40 years	60 of 100 (Major)
21 August 2021	Upham 3 N, US	daily rain	76.7 mm (3.0 in)	47.2 mm (1.9 in)	40 years	60 of 100 (Major)
21 August 2021	Viljujsk, RU	daily rain	54.1 mm (2.1 in)	30.6 mm (1.2 in)	30 years	59 of 100 (Notable)
21 August 2021	Rugby, US	monthly rain	91.4 mm (3.6 in)	22.8 mm (0.9 in)	52 years	57 of 100 (Notable)
21 August 2021	Little Warm, US	daily rain	27.9 mm (1.1 in)	20.3 mm (0.8 in)	40 years	56 of 100 (Notable)
21 August 2021	Kaneohe Bay MCAS, US	monthly low max	23.9 C (75.0 F)	1.7 C (3.1 F)	66 years	52 of 100 (Notable)
21 August 2021	Eskdalemuir, GB	daily rain	37.0 mm (1.5 in)	12.0 mm (0.5 in)	87 years	49 of 100 (Notable)
21 August 2021	Parley's Summit, US	daily rain	35.6 mm (1.4 in)	22.9 mm (0.9 in)	20 years	48 of 100 (Notable)
21 August 2021	Ufa, RU	daily high max	38.4 C (101.1 F)	5.9 C (10.6 F)	87 years	47 of 100 (Notable)
21 August 2021	Vernal, US	daily low max	21.1 C (70.0 F)	2.2 C (4.0 F)	124 years	47 of 100 (Notable)
21 August 2021	Snake Rvr, US	daily low max	11.1 C (52.0 F)	3.3 C (5.9 F)	96 years	47 of 100 (Notable)
21 August 2021	Chalk Creek #2, US	daily rain	27.9 mm (1.1 in)	17.7 mm (0.7 in)	28 years	46 of 100 (Notable)
21 August 2021	Chalk Creek #1, US	daily rain	33.0 mm (1.3 in)	17.8 mm (0.7 in)	28 years	45 of 100 (Notable)
21 August 2021	Banfield Mountain, US	daily rain	27.9 mm (1.1 in)	15.2 mm (0.6 in)	32 years	44 of 100 (Notable)
21 August 2021	West Terschelling, NL	daily rain	30.5 mm (1.2 in)	2.1 mm (0.08 in)	126 years	43 of 100 (Notable)
21 August 2021	Ust-Maja, RU	daily high max	31.5 C (88.7 F)	3.5 C (6.3 F)	91 years	43 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 2021

Records set or tied on this calendar date in each year from 1800 to 2021. 2021 had 767 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	1,290

Download the Data

Data for records on 2021-08-21: 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 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Margin	Records
0 to 20	593
20 to 40	20
40 to 60	4
60 to 80	1
80 to 100	1
100 to 120	1