Weather Records on 12 August 2017

533 weather records were set or tied worldwide on 12 August 2017. Highest significance: Henderson 2 NNW, US.

Key Facts for 12 August 2017

On 12 August 2017, 533 weather records were set or tied at long-record stations worldwide.
248 were record highs and 133 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 17 monthly and 514 daily.
Henderson 2 NNW set a daily record precipitation of 127.0 mm (5.0 in) on 12 August 2017.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 447 records.

Record Map

533 stations

533 station records on 12 August 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 August 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Henderson 2 NNW	United States	Record daily precipitation	127.0 mm (5.0 in)	66 of 100 (Major)
Volciha	Russia	Record daily precipitation	39.1 mm (1.5 in)	61 of 100 (Major)
Hardy	United States	Record daily precipitation	53.3 mm (2.1 in)	59 of 100 (Notable)
London State Fish Hatchery	United States	Record daily precipitation	58.9 mm (2.3 in)	59 of 100 (Notable)
Ellendale Post Office	Australia	Record daily precipitation	31.8 mm (1.3 in)	55 of 100 (Notable)
Montezuma Castle Nm	United States	Record daily precipitation	73.7 mm (2.9 in)	52 of 100 (Notable)
Tartu-Toravere	Estonia	Record daily precipitation	38.0 mm (1.5 in)	51 of 100 (Notable)
Haapavesi Mustikkamaki	Finland	Record daily precipitation	33.6 mm (1.3 in)	51 of 100 (Notable)
Vaala Pelso	Finland	Record daily precipitation	34.3 mm (1.4 in)	49 of 100 (Notable)
Pomeroy	United States	Record high minimum temperature	23.9 C (75.0 F)	45 of 100 (Notable)
Changde	China	Record daily precipitation	105.9 mm (4.2 in)	44 of 100 (Notable)
Kamen-Na-Obi	Russia	Record daily precipitation	27.0 mm (1.1 in)	44 of 100 (Notable)
Andrews	United States	Record daily precipitation	78.7 mm (3.1 in)	44 of 100 (Notable)
Pendleton Dwtn	United States	Record high minimum temperature	21.7 C (71.1 F)	43 of 100 (Notable)
Hobart Muni AP	United States	Record low maximum temperature	23.3 C (73.9 F)	43 of 100 (Notable)
Donnybrook	Australia	Record daily precipitation	36.3 mm (1.4 in)	42 of 100 (Notable)
Drobeta Turnu Severin	Romania	Record high minimum temperature	24.6 C (76.3 F)	42 of 100 (Notable)
Springerville	United States	Record low minimum temperature	4.4 C (39.9 F)	42 of 100 (Notable)
Innadong	Australia	Record daily precipitation	35.0 mm (1.4 in)	41 of 100 (Notable)
Alicia 2 NNE	United States	Record daily precipitation	41.9 mm (1.6 in)	41 of 100 (Notable)
Arlington	United States	Record high minimum temperature	23.9 C (75.0 F)	41 of 100 (Notable)
Knoxville AP	United States	Record daily precipitation	50.8 mm (2.0 in)	41 of 100 (Notable)
Ahtari Myllymaki	Finland	Record daily precipitation	38.9 mm (1.5 in)	40 of 100 (Notable)
Mogoca	Russia	Record high minimum temperature	18.5 C (65.3 F)	40 of 100 (Notable)
Marshall	United States	Record daily precipitation	92.7 mm (3.6 in)	40 of 100 (Notable)
Ellendale	United States	Record daily precipitation	91.9 mm (3.6 in)	39 of 100 (Notable)
Whiteville 7 NW	United States	Record daily precipitation	61.0 mm (2.4 in)	38 of 100 (Notable)
Turkestan	Kazakhstan	Record low minimum temperature	11.4 C (52.5 F)	37 of 100 (Notable)
Tipton 4S Mesonet	United States	Record low maximum temperature	25.6 C (78.1 F)	37 of 100 (Notable)
Pendleton Dwtn	United States	Record high maximum temperature	41.1 C (106.0 F)	37 of 100 (Notable)
Semej	Kazakhstan	Record low maximum temperature	15.4 C (59.7 F)	35 of 100 (Notable)
Arad	Romania	Record high minimum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Kindsjon_D	Sweden	Record daily precipitation	29.5 mm (1.2 in)	35 of 100 (Notable)
Pilot Rock 1 SE	United States	Record high minimum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Minsk	Belarus	Record high maximum temperature	32.0 C (89.6 F)	34 of 100 (Routine)
Viljujsk	Russia	Record high minimum temperature	16.7 C (62.1 F)	34 of 100 (Routine)
Aldan	Russia	Record high minimum temperature	18.4 C (65.1 F)	34 of 100 (Routine)
San Sebastian - Igueldo	Spain	Record low minimum temperature	12.5 C (54.5 F)	34 of 100 (Routine)
Mayo	United States	Record daily precipitation	99.3 mm (3.9 in)	34 of 100 (Routine)
Eldon	United States	Record daily precipitation	30.5 mm (1.2 in)	34 of 100 (Routine)
Gila Hot Springs	United States	Record daily precipitation	47.5 mm (1.9 in)	34 of 100 (Routine)
Plain	United States	Record high minimum temperature	17.2 C (63.0 F)	34 of 100 (Routine)
Rebriha	Russia	Record daily precipitation	29.5 mm (1.2 in)	33 of 100 (Routine)
Krasnaja Poljana	Russia	Record high minimum temperature	21.0 C (69.8 F)	33 of 100 (Routine)
Camp Pendleton MCAS	United States	Record low maximum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Tallinn	Estonia	Record high maximum temperature	28.3 C (82.9 F)	32 of 100 (Routine)
Leusi	Russia	Record low minimum temperature	3.9 C (39.0 F)	32 of 100 (Routine)
Elk City 4 W	United States	Record daily precipitation	42.2 mm (1.7 in)	32 of 100 (Routine)
Abernathy	United States	Record daily precipitation	83.3 mm (3.3 in)	32 of 100 (Routine)
Clinton-Sherman AP	United States	Record daily precipitation	42.4 mm (1.7 in)	32 of 100 (Routine)
Xichang	China	Record daily precipitation	83.1 mm (3.3 in)	31 of 100 (Routine)
Siikalatva Kestila	Finland	Record daily precipitation	26.5 mm (1.0 in)	31 of 100 (Routine)
Takada	Japan	Record daily precipitation	59.9 mm (2.4 in)	31 of 100 (Routine)
Surgut	Russia	Record low maximum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Ust-Njukzha	Russia	Record high minimum temperature	18.6 C (65.5 F)	31 of 100 (Routine)
Arnett 3NE	United States	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Williamsburg	United States	Record daily precipitation	117.3 mm (4.6 in)	31 of 100 (Routine)
Tamdy	Uzbekistan	Record low maximum temperature	28.5 C (83.3 F)	31 of 100 (Routine)
Kotka Rankki	Finland	Record daily precipitation	42.1 mm (1.7 in)	30 of 100 (Routine)
Ilirnej	Russia	Record low minimum temperature	-6.1 C (21.0 F)	30 of 100 (Routine)

Counts by Type and Timescale

533 records

Records set or tied on 12 August 2017 by type: Highest daily maximum 87, Lowest daily maximum 88, Highest daily minimum 161, Lowest daily minimum 45, Heaviest daily rainfall 152.

Records on 12 August 2017 by type
Record type	Records
Highest daily maximum	87
Lowest daily maximum	88
Highest daily minimum	161
Lowest daily minimum	45
Heaviest daily rainfall	152
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 August 2017 by timescale: all-time 2, monthly 17, daily 514.

How Much Records Were Beaten By

446 broken records

Margins by which the 446 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 70.1. Ties are not counted.

Top 20 by Significance

12 August 2017

Top 20 records on 12 August 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 August 2017	Henderson 2 NNW, US	daily rain	127.0 mm (5.0 in)	70.1 mm (2.8 in)	56 years	66 of 100 (Major)
12 August 2017	Volciha, RU	daily rain	39.1 mm (1.5 in)	28.2 mm (1.1 in)	44 years	61 of 100 (Major)
12 August 2017	Hardy, US	daily rain	53.3 mm (2.1 in)	37.3 mm (1.5 in)	111 years	59 of 100 (Notable)
12 August 2017	London State Fish Hatchery, US	daily rain	58.9 mm (2.3 in)	37.3 mm (1.5 in)	68 years	59 of 100 (Notable)
12 August 2017	Ellendale Post Office, AU	daily rain	31.8 mm (1.3 in)	13.0 mm (0.5 in)	80 years	55 of 100 (Notable)
12 August 2017	Montezuma Castle Nm, US	daily rain	73.7 mm (2.9 in)	28.0 mm (1.1 in)	38 years	52 of 100 (Notable)
12 August 2017	Tartu-Toravere, EE	daily rain	38.0 mm (1.5 in)	16.7 mm (0.7 in)	68 years	51 of 100 (Notable)
12 August 2017	Haapavesi Mustikkamaki, FI	daily rain	33.6 mm (1.3 in)	24.4 mm (1.0 in)	28 years	51 of 100 (Notable)
12 August 2017	Vaala Pelso, FI	daily rain	34.3 mm (1.4 in)	17.4 mm (0.7 in)	56 years	49 of 100 (Notable)
12 August 2017	Pomeroy, US	daily high min	23.9 C (75.0 F)	2.2 C (4.0 F)	118 years	45 of 100 (Notable)
12 August 2017	Changde, CN	daily rain	105.9 mm (4.2 in)	56.4 mm (2.2 in)	40 years	44 of 100 (Notable)
12 August 2017	Kamen-Na-Obi, RU	daily rain	27.0 mm (1.1 in)	12.9 mm (0.5 in)	48 years	44 of 100 (Notable)
12 August 2017	Andrews, US	daily rain	78.7 mm (3.1 in)	46.4 mm (1.8 in)	38 years	44 of 100 (Notable)
12 August 2017	Pendleton Dwtn, US	daily high min	21.7 C (71.1 F)	1.1 C (2.0 F)	111 years	43 of 100 (Notable)
12 August 2017	Hobart Muni AP, US	daily low max	23.3 C (73.9 F)	1.7 C (3.1 F)	96 years	43 of 100 (Notable)
12 August 2017	Donnybrook, AU	daily rain	36.3 mm (1.4 in)	2.0 mm (0.08 in)	104 years	42 of 100 (Notable)
12 August 2017	Drobeta Turnu Severin, RO	daily high min	24.6 C (76.3 F)	3.3 C (5.9 F)	71 years	42 of 100 (Notable)
12 August 2017	Springerville, US	daily low min	4.4 C (39.9 F)	0.6 C (1.1 F)	106 years	42 of 100 (Notable)
12 August 2017	Innadong, AU	daily rain	35.0 mm (1.4 in)	3.5 mm (0.14 in)	96 years	41 of 100 (Notable)
12 August 2017	Alicia 2 NNE, US	daily rain	41.9 mm (1.6 in)	2.5 mm (0.10 in)	111 years	41 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

1793 to 2017

Records set or tied on this calendar date in each year from 1793 to 2017. 2017 had 533 records.

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

Records on 08-12 in each year
Year	Records
1793	1
1796	1
1811	2
1814	1
1815	1
1825	1
1843	1
1851	1
1854	1
1855	2
1856	1
1861	1
1864	3
1865	1
1867	1
1868	1
1871	2
1872	1
1873	1
1874	2
1875	3
1876	2
1879	1
1881	2
1883	1
1884	1
1885	1
1887	2
1888	2
1889	4
1890	4
1891	4
1892	2
1893	1
1894	1
1895	6
1896	2
1897	4
1898	1
1899	10
1900	1
1901	5
1902	9
1903	14
1904	13
1905	16
1906	8
1907	8
1908	31
1909	42
1910	16
1911	33
1912	40
1913	39
1914	26
1915	46
1916	31
1917	134
1918	37
1919	42
1920	26
1921	174
1922	71
1923	89
1924	267
1925	150
1926	154
1927	145
1928	173
1929	276
1930	501
1931	708
1932	418
1933	271
1934	471
1935	408
1936	591
1937	356
1938	237
1939	282
1940	545
1941	481
1942	257
1943	523
1944	595
1945	295
1946	655
1947	729
1948	384
1949	469
1950	442
1951	357
1952	533
1953	227
1954	969
1955	590
1956	265
1957	384
1958	406
1959	388
1960	707
1961	381
1962	466
1963	559
1964	1,346
1965	977
1966	777
1967	1,135
1968	444
1969	629
1970	422
1971	486
1972	473
1973	442
1974	560
1975	593
1976	495
1977	747
1978	571
1979	1,192
1980	692
1981	665
1982	789
1983	923
1984	665
1985	935
1986	615
1987	935
1988	1,518
1989	827
1990	727
1991	726
1992	1,134
1993	936
1994	861
1995	1,654
1996	1,336
1997	1,363
1998	1,215
1999	1,325
2000	741
2001	855
2002	1,345
2003	1,752
2004	1,872
2005	1,085
2006	874
2007	1,209
2008	970
2009	814
2010	1,907
2011	903
2012	910
2013	427
2014	787
2015	757
2016	1,290
2017	533
2018	571
2019	695
2020	730
2021	980
2022	616
2023	779
2024	659
2025	639
2026	849

Download the Data

Data for records on 2017-08-12: 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 2026-10-16 (16 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	398
10 to 20	29
20 to 30	13
30 to 40	2
40 to 50	2
50 to 60	1
60 to 70	0
70 to 80	1