Weather Records on 17 August 2011

956 weather records were set or tied worldwide on 17 August 2011. Highest significance: Brunswick, US.

Key Facts for 17 August 2011

On 17 August 2011, 956 weather records were set or tied at long-record stations worldwide.
528 were record highs and 157 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 16 monthly and 935 daily.
Brunswick set a daily record precipitation of 72.6 mm (2.9 in) on 17 August 2011.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 471 records.

Record Map

956 stations

956 station records on 17 August 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Brunswick	United States	Record daily precipitation	72.6 mm (2.9 in)	61 of 100 (Major)
Woodside	Australia	Record daily precipitation	36.0 mm (1.4 in)	60 of 100 (Major)
Vytegra	Russia	Record daily precipitation	61.5 mm (2.4 in)	56 of 100 (Notable)
Williamstown	Australia	Record daily precipitation	30.6 mm (1.2 in)	54 of 100 (Notable)
Dalton Post Office	Australia	Record daily precipitation	32.0 mm (1.3 in)	53 of 100 (Notable)
Ossora	Russia	Record daily precipitation	68.8 mm (2.7 in)	53 of 100 (Notable)
Nikolskoye/Beringa Ostrov	Russia	Record daily precipitation	40.9 mm (1.6 in)	50 of 100 (Notable)
Joutsa Parnamaki	Finland	Record daily precipitation	39.7 mm (1.6 in)	49 of 100 (Notable)
Port Lincoln (Big Swamp)	Australia	Record daily precipitation	26.0 mm (1.0 in)	48 of 100 (Notable)
Linguere	Senegal	Record low minimum temperature	14.0 C (57.2 F)	48 of 100 (Notable)
Coloso	Puerto Rico [United States]	Record daily precipitation	94.7 mm (3.7 in)	47 of 100 (Notable)
Lobethal	Australia	Record daily precipitation	43.6 mm (1.7 in)	46 of 100 (Notable)
Yeneka	Mexico	Record high minimum temperature	31.7 C (89.1 F)	46 of 100 (Notable)
Kamennaja-Step	Russia	Record daily precipitation	25.9 mm (1.0 in)	46 of 100 (Notable)
Eldon	United States	Record daily precipitation	43.4 mm (1.7 in)	46 of 100 (Notable)
Bridgewater	Australia	Record daily precipitation	44.8 mm (1.8 in)	45 of 100 (Notable)
Bungendore (Gidleigh)	Australia	Record daily precipitation	35.0 mm (1.4 in)	45 of 100 (Notable)
Hahndorf	Australia	Record daily precipitation	31.4 mm (1.2 in)	44 of 100 (Notable)
Mount Bold Reservoir	Australia	Record daily precipitation	35.4 mm (1.4 in)	44 of 100 (Notable)
Crooked Corner (Wingadeena)	Australia	Record daily precipitation	44.0 mm (1.7 in)	44 of 100 (Notable)
Mt Ayr	United States	Record daily precipitation	63.5 mm (2.5 in)	44 of 100 (Notable)
Weatherford	United States	Record high minimum temperature	26.7 C (80.1 F)	44 of 100 (Notable)
Upper Hermitage	Australia	Record daily precipitation	32.8 mm (1.3 in)	43 of 100 (Notable)
Sysma Joutsjarvi	Finland	Record daily precipitation	39.0 mm (1.5 in)	43 of 100 (Notable)
Halsua Kanala Purola	Finland	Record daily precipitation	34.0 mm (1.3 in)	42 of 100 (Notable)
Lafayette Rgnl AP	United States	Record high maximum temperature	37.8 C (100.0 F)	42 of 100 (Notable)
Clarendon	United States	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Uraidla	Australia	Record daily precipitation	41.2 mm (1.6 in)	41 of 100 (Notable)
The Lagoon (Springfield)	Australia	Record daily precipitation	32.0 mm (1.3 in)	41 of 100 (Notable)
Goldendale	United States	Record low minimum temperature	3.3 C (37.9 F)	41 of 100 (Notable)
Marquette	United States	Record high minimum temperature	20.6 C (69.1 F)	41 of 100 (Notable)
Essendon Airport	Australia	Record high minimum temperature	12.8 C (55.0 F)	40 of 100 (Notable)
Orenburg	Russia	Record high minimum temperature	19.3 C (66.7 F)	40 of 100 (Notable)
Augustine 2E	United States	Record high minimum temperature	17.8 C (64.0 F)	40 of 100 (Notable)
Capitan	United States	Record high minimum temperature	16.1 C (61.0 F)	40 of 100 (Notable)
Rienhardt Rch	United States	Record daily precipitation	36.8 mm (1.4 in)	40 of 100 (Notable)
Agartala	India	Record low maximum temperature	26.0 C (78.8 F)	39 of 100 (Notable)
Ostaskov	Russia	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Leesville	United States	Record high maximum temperature	40.0 C (104.0 F)	39 of 100 (Notable)
Asikkala Urajarvi	Finland	Record daily precipitation	31.2 mm (1.2 in)	38 of 100 (Notable)
Bessaker	Norway	Record daily precipitation	29.2 mm (1.1 in)	38 of 100 (Notable)
Petrified Forest Np	United States	Record high minimum temperature	20.0 C (68.0 F)	38 of 100 (Notable)
Paris	United States	Record high minimum temperature	28.9 C (84.0 F)	38 of 100 (Notable)
Cairo 1SW	United States	Record low minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Sherman	United States	Record high minimum temperature	27.8 C (82.0 F)	37 of 100 (Notable)
Tyler Pounds Fld	United States	Record high minimum temperature	27.8 C (82.0 F)	37 of 100 (Notable)
Buholmrasa Fyr	Norway	Record daily precipitation	25.7 mm (1.0 in)	36 of 100 (Notable)
Longwood	Australia	Record daily precipitation	41.0 mm (1.6 in)	35 of 100 (Notable)
Progreso	Mexico	Record high maximum temperature	33.9 C (93.0 F)	35 of 100 (Notable)
N'Guigni	Niger	Record low maximum temperature	26.2 C (79.2 F)	35 of 100 (Notable)
Staritsa	Russia	Record daily precipitation	32.6 mm (1.3 in)	35 of 100 (Notable)
Fairhope 2 NE	United States	Record low minimum temperature	17.8 C (64.0 F)	35 of 100 (Notable)
Mountainair	United States	Record high minimum temperature	16.7 C (62.1 F)	35 of 100 (Notable)
Guayameo	Mexico	Record high minimum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Strelka Chunja	Russia	Record daily precipitation	27.2 mm (1.1 in)	34 of 100 (Routine)
Udon Thani	Thailand	Record low minimum temperature	21.2 C (70.2 F)	34 of 100 (Routine)
Santa Fe Co Muni AP	United States	Record high minimum temperature	17.2 C (63.0 F)	34 of 100 (Routine)
Echunga Golf Course	Australia	Record daily precipitation	36.0 mm (1.4 in)	33 of 100 (Routine)
Williamstown (South Para Reser	Australia	Record daily precipitation	33.2 mm (1.3 in)	33 of 100 (Routine)
Uil	Kazakhstan	Record high maximum temperature	39.3 C (102.7 F)	33 of 100 (Routine)

Counts by Type and Timescale

956 records

Records set or tied on 17 August 2011 by type: Highest daily maximum 246, Lowest daily maximum 68, Highest daily minimum 282, Lowest daily minimum 89, Heaviest daily rainfall 271.

Records on 17 August 2011 by type
Record type	Records
Highest daily maximum	246
Lowest daily maximum	68
Highest daily minimum	282
Lowest daily minimum	89
Heaviest daily rainfall	271
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 2011 by timescale: all-time 5, monthly 16, daily 935.

How Much Records Were Beaten By

669 broken records

Margins by which the 669 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 50.0. Ties are not counted.

Top 20 by Significance

17 August 2011

Top 20 records on 17 August 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 2011	Brunswick, US	daily rain	72.6 mm (2.9 in)	37.0 mm (1.5 in)	89 years	61 of 100 (Major)
17 August 2011	Woodside, AU	daily rain	36.0 mm (1.4 in)	16.2 mm (0.6 in)	104 years	60 of 100 (Major)
17 August 2011	Vytegra, RU	daily rain	61.5 mm (2.4 in)	37.9 mm (1.5 in)	20 years	56 of 100 (Notable)
17 August 2011	Williamstown, AU	daily rain	30.6 mm (1.2 in)	9.8 mm (0.39 in)	121 years	54 of 100 (Notable)
17 August 2011	Dalton Post Office, AU	daily rain	32.0 mm (1.3 in)	9.1 mm (0.36 in)	109 years	53 of 100 (Notable)
17 August 2011	Ossora, RU	daily rain	68.8 mm (2.7 in)	50.0 mm (2.0 in)	32 years	53 of 100 (Notable)
17 August 2011	Nikolskoye/Beringa Ostrov, RU	daily rain	40.9 mm (1.6 in)	6.9 mm (0.27 in)	98 years	50 of 100 (Notable)
17 August 2011	Joutsa Parnamaki, FI	daily rain	39.7 mm (1.6 in)	27.2 mm (1.1 in)	29 years	49 of 100 (Notable)
17 August 2011	Port Lincoln (Big Swamp), AU	daily rain	26.0 mm (1.0 in)	9.5 mm (0.37 in)	69 years	48 of 100 (Notable)
17 August 2011	Linguere, SN	daily low min	14.0 C (57.2 F)	5.8 C (10.4 F)	40 years	48 of 100 (Notable)
17 August 2011	Coloso, PR	daily rain	94.7 mm (3.7 in)	21.0 mm (0.8 in)	84 years	47 of 100 (Notable)
17 August 2011	Lobethal, AU	daily rain	43.6 mm (1.7 in)	9.1 mm (0.36 in)	88 years	46 of 100 (Notable)
17 August 2011	Yeneka, MX	daily high min	31.7 C (89.1 F)	6.7 C (12.1 F)	48 years	46 of 100 (Notable)
17 August 2011	Kamennaja-Step, RU	daily rain	25.9 mm (1.0 in)	8.7 mm (0.34 in)	85 years	46 of 100 (Notable)
17 August 2011	Eldon, US	daily rain	43.4 mm (1.7 in)	15.5 mm (0.6 in)	89 years	46 of 100 (Notable)
17 August 2011	Bridgewater, AU	daily rain	44.8 mm (1.8 in)	10.0 mm (0.4 in)	88 years	45 of 100 (Notable)
17 August 2011	Bungendore (Gidleigh), AU	daily rain	35.0 mm (1.4 in)	16.7 mm (0.7 in)	49 years	45 of 100 (Notable)
17 August 2011	Hahndorf, AU	daily rain	31.4 mm (1.2 in)	3.5 mm (0.14 in)	122 years	44 of 100 (Notable)
17 August 2011	Mount Bold Reservoir, AU	daily rain	35.4 mm (1.4 in)	18.6 mm (0.7 in)	26 years	44 of 100 (Notable)
17 August 2011	Crooked Corner (Wingadeena), AU	daily rain	44.0 mm (1.7 in)	20.6 mm (0.8 in)	49 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

1797 to 2011

Records set or tied on this calendar date in each year from 1797 to 2011. 2011 had 956 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 2011-08-17: 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Histogram of margins by which records were beaten on 17 August 2011
Margin	Records
0 to 10	613
10 to 20	37
20 to 30	15
30 to 40	3
40 to 50	1