Weather Records on 17 August 2020

1,529 weather records were set or tied worldwide on 17 August 2020. Highest significance: Wallangarra Post Office, AU.

Key Facts for 17 August 2020

On 17 August 2020, 1,529 weather records were set or tied at long-record stations worldwide.
1,378 were record highs and 44 were record lows, counting maximum and minimum temperature.
By timescale, 22 were all-time records, 68 monthly and 1,439 daily.
Wallangarra Post Office set a daily record precipitation of 39.0 mm (1.5 in) on 17 August 2020.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 467 records.

Record Map

1,529 stations

1,529 station records on 17 August 2020 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 2020: highest significance records shown on the map
Station	Country	Type	Value	Significance
Wallangarra Post Office	Australia	Record daily precipitation	39.0 mm (1.5 in)	67 of 100 (Major)
Bodie California St Historic P	United States	Record daily precipitation	35.6 mm (1.4 in)	66 of 100 (Major)
Lillington	United States	Record daily precipitation	86.4 mm (3.4 in)	64 of 100 (Major)
Davis 2 WSW Exp Farm	United States	Record high minimum temperature	25.6 C (78.1 F)	56 of 100 (Notable)
St George	United States	Record high maximum temperature	46.1 C (115.0 F)	53 of 100 (Notable)
Buckhorn	United States	Record daily precipitation	48.3 mm (1.9 in)	52 of 100 (Notable)
Glen St Mary 1 W	United States	Record low minimum temperature	14.4 C (57.9 F)	52 of 100 (Notable)
Everett	United States	Record high maximum temperature	37.8 C (100.0 F)	52 of 100 (Notable)
Watsonville Wtr Wks	United States	Record high maximum temperature	35.6 C (96.1 F)	50 of 100 (Notable)
Virginia City	United States	Record high maximum temperature	36.1 C (97.0 F)	49 of 100 (Notable)
Marlo	Australia	Record daily precipitation	36.0 mm (1.4 in)	48 of 100 (Notable)
Solomons	United States	Record low maximum temperature	21.7 C (71.1 F)	48 of 100 (Notable)
Jacksboro	United States	Record daily precipitation	40.1 mm (1.6 in)	48 of 100 (Notable)
Napa State Hospital	United States	Record high minimum temperature	20.6 C (69.1 F)	47 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	38.9 mm (1.5 in)	47 of 100 (Notable)
Belgaum/Sambra	India	Record daily precipitation	72.6 mm (2.9 in)	46 of 100 (Notable)
Gila Bend 2SE	United States	Record high maximum temperature	47.8 C (118.0 F)	46 of 100 (Notable)
Redwood City	United States	Record high minimum temperature	21.1 C (70.0 F)	46 of 100 (Notable)
Utah Lake Lehi	United States	Record high maximum temperature	38.3 C (100.9 F)	46 of 100 (Notable)
Alpine	United States	Record high maximum temperature	30.6 C (87.1 F)	45 of 100 (Notable)
Tombstone	United States	Record high maximum temperature	40.0 C (104.0 F)	45 of 100 (Notable)
Williams	United States	Record high maximum temperature	33.9 C (93.0 F)	45 of 100 (Notable)
Potter Valley Powerhouse	United States	Record high minimum temperature	20.0 C (68.0 F)	45 of 100 (Notable)
Caliente	United States	Record high maximum temperature	41.7 C (107.1 F)	45 of 100 (Notable)
Barrett Meadows	Australia	Record daily precipitation	37.0 mm (1.5 in)	44 of 100 (Notable)
Jerome	United States	Record high maximum temperature	39.4 C (102.9 F)	44 of 100 (Notable)
Carmel Valley	United States	Record high minimum temperature	18.3 C (64.9 F)	44 of 100 (Notable)
Mallacoota	Australia	Record daily precipitation	47.8 mm (1.9 in)	43 of 100 (Notable)
Prescott	United States	Record high maximum temperature	38.9 C (102.0 F)	43 of 100 (Notable)
Newman	United States	Record high maximum temperature	43.9 C (111.0 F)	43 of 100 (Notable)
Turlock #2	United States	Record high maximum temperature	40.0 C (104.0 F)	43 of 100 (Notable)
Saint Anthony	United States	Record high maximum temperature	35.0 C (95.0 F)	43 of 100 (Notable)
Old Faithful	United States	Record high maximum temperature	30.6 C (87.1 F)	43 of 100 (Notable)
Elko Rgnl AP	United States	Record high maximum temperature	38.9 C (102.0 F)	43 of 100 (Notable)
Laghouat	Algeria	Record high minimum temperature	25.7 C (78.3 F)	42 of 100 (Notable)
Genoa (Fools Haven)	Australia	Record daily precipitation	31.6 mm (1.2 in)	42 of 100 (Notable)
Casa Grande	United States	Record high maximum temperature	45.0 C (113.0 F)	42 of 100 (Notable)
Newman	United States	Record high minimum temperature	26.1 C (79.0 F)	42 of 100 (Notable)
San Jose	United States	Record high minimum temperature	21.7 C (71.1 F)	42 of 100 (Notable)
Stevensville 2SW	United States	Record low maximum temperature	22.8 C (73.0 F)	42 of 100 (Notable)
Pahrump 4 NW	United States	Record high maximum temperature	44.4 C (111.9 F)	42 of 100 (Notable)
Spokane Intl AP	United States	Record high minimum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Goongerah	Australia	Record daily precipitation	36.6 mm (1.4 in)	41 of 100 (Notable)
Hellendoorn	Netherlands	Record daily precipitation	33.1 mm (1.3 in)	41 of 100 (Notable)
Visby_Flygplats	Sweden	Record high maximum temperature	26.9 C (80.4 F)	41 of 100 (Notable)
Seligman	United States	Record high maximum temperature	40.0 C (104.0 F)	41 of 100 (Notable)
Five Points 5 SSW	United States	Record high minimum temperature	31.1 C (88.0 F)	41 of 100 (Notable)
Hetch Hetchy	United States	Record high maximum temperature	36.7 C (98.1 F)	41 of 100 (Notable)
Kentfield	United States	Record high minimum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Lemon Cove	United States	Record high maximum temperature	42.8 C (109.0 F)	41 of 100 (Notable)
Lindsay	United States	Record high maximum temperature	42.2 C (108.0 F)	41 of 100 (Notable)
Beowawe	United States	Record high minimum temperature	20.6 C (69.1 F)	41 of 100 (Notable)
Drain	United States	Record high maximum temperature	40.0 C (104.0 F)	41 of 100 (Notable)
Thermopolis	United States	Record high maximum temperature	37.8 C (100.0 F)	41 of 100 (Notable)
Oakland Intl AP	United States	Record high minimum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
San Francisco Dwtn	United States	Record high minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Gabes	Tunisia	Record high minimum temperature	29.3 C (84.7 F)	40 of 100 (Notable)
Bagdad	United States	Record high maximum temperature	41.7 C (107.1 F)	40 of 100 (Notable)
Saint Maries	United States	Record high maximum temperature	38.3 C (100.9 F)	40 of 100 (Notable)
Beowawe	United States	Record high maximum temperature	40.0 C (104.0 F)	40 of 100 (Notable)

Counts by Type and Timescale

1,529 records

Records set or tied on 17 August 2020 by type: Highest daily maximum 785, Lowest daily maximum 21, Highest daily minimum 593, Lowest daily minimum 23, Heaviest daily rainfall 107.

Records on 17 August 2020 by type
Record type	Records
Highest daily maximum	785
Lowest daily maximum	21
Highest daily minimum	593
Lowest daily minimum	23
Heaviest daily rainfall	107
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 2020 by timescale: all-time 22, monthly 68, daily 1,439.

How Much Records Were Beaten By

1,237 broken records

Margins by which the 1,237 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 67.1. Ties are not counted.

Top 20 by Significance

17 August 2020

Top 20 records on 17 August 2020 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 2020	Wallangarra Post Office, AU	daily rain	39.0 mm (1.5 in)	22.2 mm (0.9 in)	102 years	67 of 100 (Major)
17 August 2020	Bodie California St Historic P, US	daily rain	35.6 mm (1.4 in)	22.9 mm (0.9 in)	55 years	66 of 100 (Major)
17 August 2020	Lillington, US	daily rain	86.4 mm (3.4 in)	67.1 mm (2.6 in)	49 years	64 of 100 (Major)
17 August 2020	Davis 2 WSW Exp Farm, US	monthly high min	25.6 C (78.1 F)	1.7 C (3.1 F)	125 years	56 of 100 (Notable)
17 August 2020	St George, US	monthly high max	46.1 C (115.0 F)	1.1 C (2.0 F)	125 years	53 of 100 (Notable)
17 August 2020	Buckhorn, US	daily rain	48.3 mm (1.9 in)	41.9 mm (1.6 in)	55 years	52 of 100 (Notable)
17 August 2020	Glen St Mary 1 W, US	daily low min	14.4 C (57.9 F)	3.4 C (6.1 F)	70 years	52 of 100 (Notable)
17 August 2020	Everett, US	all-time high max	37.8 C (100.0 F)	1.1 C (2.0 F)	65 years	52 of 100 (Notable)
17 August 2020	Watsonville Wtr Wks, US	daily high max	35.6 C (96.1 F)	3.4 C (6.1 F)	102 years	50 of 100 (Notable)
17 August 2020	Virginia City, US	daily high max	36.1 C (97.0 F)	3.9 C (7.0 F)	114 years	49 of 100 (Notable)
17 August 2020	Marlo, AU	daily rain	36.0 mm (1.4 in)	16.2 mm (0.6 in)	59 years	48 of 100 (Notable)
17 August 2020	Solomons, US	daily low max	21.7 C (71.1 F)	2.7 C (4.9 F)	120 years	48 of 100 (Notable)
17 August 2020	Jacksboro, US	daily rain	40.1 mm (1.6 in)	28.9 mm (1.1 in)	70 years	48 of 100 (Notable)
17 August 2020	Napa State Hospital, US	daily high min	20.6 C (69.1 F)	1.7 C (3.1 F)	102 years	47 of 100 (Notable)
17 August 2020	Hillsboro, US	daily rain	38.9 mm (1.5 in)	26.2 mm (1.0 in)	78 years	47 of 100 (Notable)
17 August 2020	Belgaum/Sambra, IN	daily rain	72.6 mm (2.9 in)	38.6 mm (1.5 in)	30 years	46 of 100 (Notable)
17 August 2020	Gila Bend 2SE, US	daily high max	47.8 C (118.0 F)	1.7 C (3.1 F)	109 years	46 of 100 (Notable)
17 August 2020	Redwood City, US	daily high min	21.1 C (70.0 F)	3.3 C (5.9 F)	74 years	46 of 100 (Notable)
17 August 2020	Utah Lake Lehi, US	monthly high max	38.3 C (100.9 F)	0.5 C (0.9 F)	86 years	46 of 100 (Notable)
17 August 2020	Alpine, US	daily high max	30.6 C (87.1 F)	2.3 C (4.1 F)	88 years	45 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 2020

Records set or tied on this calendar date in each year from 1797 to 2020. 2020 had 1,529 records.

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

Records on 08-17 in each year
Year	Records
1797	2
1802	2
1820	2
1837	1
1838	2
1841	2
1842	1
1845	2
1853	1
1854	1
1856	1
1857	1
1861	3
1862	1
1867	1
1868	3
1869	1
1872	1
1875	2
1876	5
1879	1
1881	1
1882	1
1883	2
1885	3
1886	1
1888	5
1891	1
1892	3
1893	2
1894	3
1895	2
1896	3
1897	1
1898	5
1899	8
1900	3
1901	14
1902	7
1903	6
1904	2
1905	11
1906	28
1907	9
1908	26
1909	24
1910	17
1911	18
1912	31
1913	79
1914	41
1915	28
1916	33
1917	35
1918	112
1919	37
1920	110
1921	37
1922	169
1923	161
1924	171
1925	130
1926	182
1927	228
1928	131
1929	243
1930	138
1931	302
1932	360
1933	260
1934	377
1935	437
1936	670
1937	726
1938	466
1939	364
1940	341
1941	378
1942	461
1943	743
1944	531
1945	387
1946	433
1947	682
1948	475
1949	371
1950	522
1951	413
1952	470
1953	345
1954	685
1955	465
1956	407
1957	504
1958	519
1959	543
1960	533
1961	998
1962	445
1963	650
1964	410
1965	641
1966	496
1967	679
1968	953
1969	593
1970	467
1971	447
1972	1,044
1973	750
1974	582
1975	612
1976	797
1977	1,216
1978	814
1979	1,464
1980	895
1981	1,112
1982	554
1983	1,574
1984	726
1985	948
1986	916
1987	1,150
1988	1,608
1989	687
1990	949
1991	560
1992	1,813
1993	803
1994	1,038
1995	1,724
1996	752
1997	1,544
1998	1,003
1999	697
2000	994
2001	1,101
2002	1,266
2003	948
2004	1,046
2005	722
2006	814
2007	1,646
2008	1,301
2009	922
2010	1,105
2011	956
2012	1,215
2013	802
2014	997
2015	890
2016	748
2017	544
2018	518
2019	467
2020	1,529
2021	800
2022	1,428
2023	1,032
2024	740
2025	538
2026	535

Download the Data

Data for records on 2020-08-17: 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	1,208
10 to 20	15
20 to 30	9
30 to 40	3
40 to 50	1
50 to 60	0
60 to 70	1