Weather Records on 20 August 2021

1,028 weather records were set or tied worldwide on 20 August 2021. Highest significance: Suntar, RU.

Key Facts for 20 August 2021

On 20 August 2021, 1,028 weather records were set or tied at long-record stations worldwide.
314 were record highs and 497 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 46 monthly and 980 daily.
Suntar set an all-time record daily precipitation of 99.1 mm (3.9 in) on 20 August 2021.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 451 records.

Record Map

1,028 stations

1,028 station records on 20 August 2021 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 2021: highest significance records shown on the map
Station	Country	Type	Value	Significance
Suntar	Russia	Record daily precipitation	99.1 mm (3.9 in)	80 of 100 (Exceptional)
Buffalo Bill Dam	United States	Record daily precipitation	31.0 mm (1.2 in)	80 of 100 (Exceptional)
Cody	United States	Record daily precipitation	36.6 mm (1.4 in)	72 of 100 (Major)
Tian-Shan	Kyrgyzstan	Record daily precipitation	99.3 mm (3.9 in)	65 of 100 (Major)
Thompson Welcome Ctr	United States	Record low maximum temperature	15.6 C (60.1 F)	64 of 100 (Major)
Imperial	United States	Record daily precipitation	114.3 mm (4.5 in)	63 of 100 (Major)
Crandall 8 N	United States	Record daily precipitation	90.7 mm (3.6 in)	62 of 100 (Major)
Napoleon	United States	Record daily precipitation	65.8 mm (2.6 in)	62 of 100 (Major)
Kingsley Dam	United States	Record daily precipitation	112.0 mm (4.4 in)	60 of 100 (Major)
Whitehall	United States	Record daily precipitation	57.4 mm (2.3 in)	57 of 100 (Notable)
Park Rapids Muni AP	United States	Record daily precipitation	74.4 mm (2.9 in)	57 of 100 (Notable)
Glenwood Spgs #2	United States	Record daily precipitation	25.4 mm (1.0 in)	56 of 100 (Notable)
Arthur	United States	Record daily precipitation	61.0 mm (2.4 in)	56 of 100 (Notable)
Cemal	Russia	Record daily precipitation	41.9 mm (1.6 in)	55 of 100 (Notable)
Richfield Radio Ksvc	United States	Record low maximum temperature	16.7 C (62.1 F)	55 of 100 (Notable)
Vernal	United States	Record low maximum temperature	16.1 C (61.0 F)	54 of 100 (Notable)
Hayes Center 1NW	United States	Record daily precipitation	51.3 mm (2.0 in)	53 of 100 (Notable)
Streeter 5 NW	United States	Record daily precipitation	77.0 mm (3.0 in)	52 of 100 (Notable)
Ft Duchesne	United States	Record low maximum temperature	16.1 C (61.0 F)	52 of 100 (Notable)
Holyoke	United States	Record daily precipitation	108.2 mm (4.3 in)	51 of 100 (Notable)
Thermopolis	United States	Record low maximum temperature	17.8 C (64.0 F)	51 of 100 (Notable)
Steele 4N	United States	Record daily precipitation	38.4 mm (1.5 in)	50 of 100 (Notable)
Portland	United States	Record daily precipitation	33.8 mm (1.3 in)	48 of 100 (Notable)
Madrid	United States	Record daily precipitation	68.8 mm (2.7 in)	48 of 100 (Notable)
Greeneville Exp STN	United States	Record daily precipitation	66.5 mm (2.6 in)	48 of 100 (Notable)
Petrun	Russia	Record daily precipitation	30.0 mm (1.2 in)	47 of 100 (Notable)
Anapa	Russia	Record daily precipitation	56.9 mm (2.2 in)	47 of 100 (Notable)
Snake Rvr	United States	Record low maximum temperature	12.2 C (54.0 F)	47 of 100 (Notable)
Shoshone	United States	Record low maximum temperature	17.8 C (64.0 F)	46 of 100 (Notable)
Plant City	United States	Record high maximum temperature	37.8 C (100.0 F)	46 of 100 (Notable)
Bozeman 6 W Exp Farm	United States	Record daily precipitation	28.4 mm (1.1 in)	46 of 100 (Notable)
Dallas 7 NE	United States	Record daily precipitation	57.4 mm (2.3 in)	45 of 100 (Notable)
Ellsworth 2W	United States	Record daily precipitation	45.2 mm (1.8 in)	45 of 100 (Notable)
Sunnyside - Lund 31S	United States	Record low maximum temperature	22.2 C (72.0 F)	45 of 100 (Notable)
Sarapul	Russia	Record high maximum temperature	37.3 C (99.1 F)	44 of 100 (Notable)
Plant City	United States	Record high minimum temperature	25.6 C (78.1 F)	44 of 100 (Notable)
Thorhult	United States	Record daily precipitation	61.0 mm (2.4 in)	44 of 100 (Notable)
Sugar Land	United States	Record high minimum temperature	26.7 C (80.1 F)	43 of 100 (Notable)
Loa	United States	Record low maximum temperature	13.3 C (55.9 F)	43 of 100 (Notable)
Moab	United States	Record low maximum temperature	24.4 C (75.9 F)	43 of 100 (Notable)
Pekoa Airport (Sant	Vanuatu	Record daily precipitation	94.0 mm (3.7 in)	42 of 100 (Notable)
Kirov	Russia	Record high maximum temperature	35.3 C (95.5 F)	42 of 100 (Notable)
Glasgow #2	United States	Record low maximum temperature	16.7 C (62.1 F)	42 of 100 (Notable)
Ogallala	United States	Record daily precipitation	55.1 mm (2.2 in)	42 of 100 (Notable)
Provo Byu	United States	Record low maximum temperature	26.1 C (79.0 F)	42 of 100 (Notable)
Gassaway	United States	Record daily precipitation	89.4 mm (3.5 in)	42 of 100 (Notable)
Uralsk	Kazakhstan	Record high maximum temperature	41.4 C (106.5 F)	41 of 100 (Notable)
Shoshone	United States	Record low minimum temperature	6.7 C (44.1 F)	41 of 100 (Notable)
Hardin	United States	Record daily precipitation	47.2 mm (1.9 in)	41 of 100 (Notable)
Kearney 4 NE	United States	Record daily precipitation	41.7 mm (1.6 in)	41 of 100 (Notable)
Keene	United States	Record high minimum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Lovell	United States	Record low maximum temperature	15.0 C (59.0 F)	41 of 100 (Notable)
Lifton Pumping STN	United States	Record low maximum temperature	10.0 C (50.0 F)	40 of 100 (Notable)
Minden	United States	Record daily precipitation	37.8 mm (1.5 in)	40 of 100 (Notable)
Oshkosh 8 SW	United States	Record daily precipitation	46.5 mm (1.8 in)	40 of 100 (Notable)
Church Buttes Gas Plt	United States	Record low maximum temperature	13.3 C (55.9 F)	40 of 100 (Notable)
Ashton 1N	United States	Record low maximum temperature	12.8 C (55.0 F)	39 of 100 (Notable)
Ennis	United States	Record daily precipitation	28.4 mm (1.1 in)	39 of 100 (Notable)
Pontotoc 1N	United States	Record daily precipitation	66.8 mm (2.6 in)	39 of 100 (Notable)
Sukumo	Japan	Record daily precipitation	109.0 mm (4.3 in)	38 of 100 (Notable)

Counts by Type and Timescale

1,028 records

Records set or tied on 20 August 2021 by type: Highest daily maximum 104, Lowest daily maximum 351, Highest daily minimum 210, Lowest daily minimum 146, Heaviest daily rainfall 217.

Records on 20 August 2021 by type
Record type	Records
Highest daily maximum	104
Lowest daily maximum	351
Highest daily minimum	210
Lowest daily minimum	146
Heaviest daily rainfall	217
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 2021 by timescale: all-time 2, monthly 46, daily 980.

How Much Records Were Beaten By

848 broken records

Margins by which the 848 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 78.7. Ties are not counted.

Top 20 by Significance

20 August 2021

Top 20 records on 20 August 2021 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 2021	Suntar, RU	all-time rain	99.1 mm (3.9 in)	18.2 mm (0.7 in)	76 years	80 of 100 (Exceptional)
20 August 2021	Buffalo Bill Dam, US	daily rain	31.0 mm (1.2 in)	19.8 mm (0.8 in)	115 years	80 of 100 (Exceptional)
20 August 2021	Cody, US	daily rain	36.6 mm (1.4 in)	25.7 mm (1.0 in)	76 years	72 of 100 (Major)
20 August 2021	Tian-Shan, KG	daily rain	99.3 mm (3.9 in)	78.7 mm (3.1 in)	55 years	65 of 100 (Major)
20 August 2021	Thompson Welcome Ctr, US	monthly low max	15.6 C (60.1 F)	5.5 C (9.9 F)	88 years	64 of 100 (Major)
20 August 2021	Imperial, US	monthly rain	114.3 mm (4.5 in)	20.3 mm (0.8 in)	87 years	63 of 100 (Major)
20 August 2021	Crandall 8 N, US	daily rain	90.7 mm (3.6 in)	56.9 mm (2.2 in)	60 years	62 of 100 (Major)
20 August 2021	Napoleon, US	daily rain	65.8 mm (2.6 in)	26.4 mm (1.0 in)	103 years	62 of 100 (Major)
20 August 2021	Kingsley Dam, US	monthly rain	112.0 mm (4.4 in)	42.9 mm (1.7 in)	6 years	60 of 100 (Major)
20 August 2021	Whitehall, US	daily rain	57.4 mm (2.3 in)	35.8 mm (1.4 in)	74 years	57 of 100 (Notable)
20 August 2021	Park Rapids Muni AP, US	daily rain	74.4 mm (2.9 in)	24.6 mm (1.0 in)	121 years	57 of 100 (Notable)
20 August 2021	Glenwood Spgs #2, US	daily rain	25.4 mm (1.0 in)	11.9 mm (0.5 in)	70 years	56 of 100 (Notable)
20 August 2021	Arthur, US	daily rain	61.0 mm (2.4 in)	30.0 mm (1.2 in)	56 years	56 of 100 (Notable)
20 August 2021	Cemal, RU	daily rain	41.9 mm (1.6 in)	21.8 mm (0.9 in)	48 years	55 of 100 (Notable)
20 August 2021	Richfield Radio Ksvc, US	monthly low max	16.7 C (62.1 F)	1.6 C (2.9 F)	109 years	55 of 100 (Notable)
20 August 2021	Vernal, US	monthly low max	16.1 C (61.0 F)	1.7 C (3.1 F)	97 years	54 of 100 (Notable)
20 August 2021	Hayes Center 1NW, US	daily rain	51.3 mm (2.0 in)	16.5 mm (0.6 in)	104 years	53 of 100 (Notable)
20 August 2021	Streeter 5 NW, US	daily rain	77.0 mm (3.0 in)	58.2 mm (2.3 in)	30 years	52 of 100 (Notable)
20 August 2021	Ft Duchesne, US	daily low max	16.1 C (61.0 F)	4.5 C (8.1 F)	96 years	52 of 100 (Notable)
20 August 2021	Holyoke, US	monthly rain	108.2 mm (4.3 in)	32.3 mm (1.3 in)	6 years	51 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

1797 to 2021

Records set or tied on this calendar date in each year from 1797 to 2021. 2021 had 1,028 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 2021-08-20: 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 10	770
10 to 20	44
20 to 30	18
30 to 40	8
40 to 50	3
50 to 60	2
60 to 70	1
70 to 80	2