Weather Records on 18 August 2012

1,247 weather records were set or tied worldwide on 18 August 2012. Highest significance: Hafslo, NO.

Key Facts for 18 August 2012

On 18 August 2012, 1,247 weather records were set or tied at long-record stations worldwide.
594 were record highs and 388 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 14 monthly and 1,231 daily.
Hafslo set a daily record precipitation of 40.5 mm (1.6 in) on 18 August 2012.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 436 records.

Record Map

1,247 stations

1,247 station records on 18 August 2012 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 2012: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hafslo	Norway	Record daily precipitation	40.5 mm (1.6 in)	77 of 100 (Major)
Oktjabrskij-Gorodok	Russia	Record daily precipitation	40.0 mm (1.6 in)	72 of 100 (Major)
Vik I Sogn III	Norway	Record daily precipitation	43.5 mm (1.7 in)	68 of 100 (Major)
Victorville	United States	Record daily precipitation	25.1 mm (1.0 in)	64 of 100 (Major)
Cjulbju	Russia	Record daily precipitation	36.8 mm (1.4 in)	56 of 100 (Notable)
Willaura (Main Street)	Australia	Record daily precipitation	25.0 mm (1.0 in)	55 of 100 (Notable)
Jogeva	Estonia	Record daily precipitation	59.6 mm (2.3 in)	54 of 100 (Notable)
Maristova	Norway	Record daily precipitation	27.4 mm (1.1 in)	54 of 100 (Notable)
Macedon Forestry	Australia	Record daily precipitation	34.0 mm (1.3 in)	53 of 100 (Notable)
Cavendish (Post Office)	Australia	Record daily precipitation	27.8 mm (1.1 in)	53 of 100 (Notable)
Aurland	Norway	Record daily precipitation	35.4 mm (1.4 in)	53 of 100 (Notable)
Austin Bergstrom Intl AP	United States	Record daily precipitation	71.9 mm (2.8 in)	51 of 100 (Notable)
Creswick	Australia	Record daily precipitation	28.0 mm (1.1 in)	50 of 100 (Notable)
Beech Forest	Australia	Record daily precipitation	51.0 mm (2.0 in)	50 of 100 (Notable)
Penshurst (the Gums)	Australia	Record daily precipitation	27.0 mm (1.1 in)	50 of 100 (Notable)
Penza	Russia	Record daily precipitation	103.2 mm (4.1 in)	50 of 100 (Notable)
Rison	United States	Record low maximum temperature	26.7 C (80.1 F)	50 of 100 (Notable)
Lavon Dam	United States	Record daily precipitation	74.2 mm (2.9 in)	50 of 100 (Notable)
Mirranatwa (Bowacka)	Australia	Record daily precipitation	28.0 mm (1.1 in)	49 of 100 (Notable)
Nanning	China	Record daily precipitation	108.6 mm (4.3 in)	49 of 100 (Notable)
Pearce - Sunsites	United States	Record daily precipitation	34.3 mm (1.4 in)	49 of 100 (Notable)
Penshurst (Post Office)	Australia	Record daily precipitation	28.2 mm (1.1 in)	47 of 100 (Notable)
Palpan	Mexico	Record low maximum temperature	20.0 C (68.0 F)	47 of 100 (Notable)
Utsira Fyr	Norway	Record daily precipitation	44.2 mm (1.7 in)	47 of 100 (Notable)
Princeton	United States	Record low minimum temperature	7.2 C (45.0 F)	47 of 100 (Notable)
Hesket (Straws Lane)	Australia	Record daily precipitation	39.4 mm (1.6 in)	46 of 100 (Notable)
Hawkesdale (Post Office)	Australia	Record daily precipitation	25.8 mm (1.0 in)	46 of 100 (Notable)
Ovre Ardal	Norway	Record daily precipitation	27.9 mm (1.1 in)	46 of 100 (Notable)
Rison	United States	Record daily precipitation	38.1 mm (1.5 in)	46 of 100 (Notable)
Bullengarook East (Seskinore)	Australia	Record daily precipitation	33.2 mm (1.3 in)	45 of 100 (Notable)
Rockbank (Melton)	Australia	Record daily precipitation	31.8 mm (1.3 in)	45 of 100 (Notable)
El Zembo	Mexico	Record daily precipitation	65.3 mm (2.6 in)	45 of 100 (Notable)
Atnsjoen	Norway	Record daily precipitation	30.3 mm (1.2 in)	45 of 100 (Notable)
Sogndal - Selseng	Norway	Record daily precipitation	51.0 mm (2.0 in)	45 of 100 (Notable)
Oberlin	United States	Record low minimum temperature	7.2 C (45.0 F)	45 of 100 (Notable)
Holdrege	United States	Record low minimum temperature	7.8 C (46.0 F)	45 of 100 (Notable)
Nagano	Japan	Record daily precipitation	51.6 mm (2.0 in)	44 of 100 (Notable)
Orenburg	Russia	Record high minimum temperature	23.2 C (73.8 F)	44 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record high maximum temperature	19.2 C (66.6 F)	44 of 100 (Notable)
Hebron	United States	Record low minimum temperature	7.8 C (46.0 F)	44 of 100 (Notable)
Ravenna	United States	Record low minimum temperature	5.6 C (42.1 F)	44 of 100 (Notable)
Redlands	United States	Record high minimum temperature	23.3 C (73.9 F)	43 of 100 (Notable)
Culbertson	United States	Record low minimum temperature	7.2 C (45.0 F)	43 of 100 (Notable)
Giddings 5E	United States	Record daily precipitation	76.5 mm (3.0 in)	43 of 100 (Notable)
Kleve	Germany	Record high maximum temperature	33.0 C (91.4 F)	42 of 100 (Notable)
Vang I Valdres	Norway	Record daily precipitation	36.5 mm (1.4 in)	42 of 100 (Notable)
Hornindal	Norway	Record daily precipitation	25.0 mm (1.0 in)	42 of 100 (Notable)
Pamplona (Observatorio)	Spain	Record high maximum temperature	40.6 C (105.1 F)	42 of 100 (Notable)
Holyoke	United States	Record low minimum temperature	8.3 C (46.9 F)	42 of 100 (Notable)
Audubon	United States	Record low minimum temperature	5.6 C (42.1 F)	42 of 100 (Notable)
Fairbury 7S	United States	Record low minimum temperature	6.1 C (43.0 F)	42 of 100 (Notable)
Ferron	United States	Record high minimum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Monroe Rgnl AP	United States	Record daily precipitation	45.0 mm (1.8 in)	42 of 100 (Notable)
Uccle	Belgium	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Bomnak	Russia	Record daily precipitation	45.4 mm (1.8 in)	41 of 100 (Notable)
Mt Vernon 3 NE	United States	Record low minimum temperature	10.6 C (51.1 F)	41 of 100 (Notable)
Atlantic 1 NE	United States	Record low minimum temperature	4.4 C (39.9 F)	41 of 100 (Notable)
Mt Ayr	United States	Record low minimum temperature	6.7 C (44.1 F)	41 of 100 (Notable)
Howell Wwtp	United States	Record low minimum temperature	6.1 C (43.0 F)	41 of 100 (Notable)
Marble Hill	United States	Record low minimum temperature	10.6 C (51.1 F)	41 of 100 (Notable)

Counts by Type and Timescale

1,247 records

Records set or tied on 18 August 2012 by type: Highest daily maximum 310, Lowest daily maximum 133, Highest daily minimum 284, Lowest daily minimum 255, Heaviest daily rainfall 265.

Records on 18 August 2012 by type
Record type	Records
Highest daily maximum	310
Lowest daily maximum	133
Highest daily minimum	284
Lowest daily minimum	255
Heaviest daily rainfall	265
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 2012 by timescale: all-time 2, monthly 14, daily 1,231.

How Much Records Were Beaten By

983 broken records

Margins by which the 983 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.7. Ties are not counted.

Top 20 by Significance

18 August 2012

Top 20 records on 18 August 2012 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 2012	Hafslo, NO	daily rain	40.5 mm (1.6 in)	23.5 mm (0.9 in)	93 years	77 of 100 (Major)
18 August 2012	Oktjabrskij-Gorodok, RU	daily rain	40.0 mm (1.6 in)	22.8 mm (0.9 in)	119 years	72 of 100 (Major)
18 August 2012	Vik I Sogn III, NO	daily rain	43.5 mm (1.7 in)	18.3 mm (0.7 in)	93 years	68 of 100 (Major)
18 August 2012	Victorville, US	daily rain	25.1 mm (1.0 in)	22.6 mm (0.9 in)	67 years	64 of 100 (Major)
18 August 2012	Cjulbju, RU	daily rain	36.8 mm (1.4 in)	31.1 mm (1.2 in)	37 years	56 of 100 (Notable)
18 August 2012	Willaura (Main Street), AU	daily rain	25.0 mm (1.0 in)	18.8 mm (0.7 in)	18 years	55 of 100 (Notable)
18 August 2012	Jogeva, EE	daily rain	59.6 mm (2.3 in)	24.4 mm (1.0 in)	50 years	54 of 100 (Notable)
18 August 2012	Maristova, NO	daily rain	27.4 mm (1.1 in)	6.9 mm (0.27 in)	107 years	54 of 100 (Notable)
18 August 2012	Macedon Forestry, AU	daily rain	34.0 mm (1.3 in)	8.6 mm (0.34 in)	137 years	53 of 100 (Notable)
18 August 2012	Cavendish (Post Office), AU	daily rain	27.8 mm (1.1 in)	12.3 mm (0.5 in)	54 years	53 of 100 (Notable)
18 August 2012	Aurland, NO	daily rain	35.4 mm (1.4 in)	25.2 mm (1.0 in)	29 years	53 of 100 (Notable)
18 August 2012	Austin Bergstrom Intl AP, US	daily rain	71.9 mm (2.8 in)	61.7 mm (2.4 in)	45 years	51 of 100 (Notable)
18 August 2012	Creswick, AU	daily rain	28.0 mm (1.1 in)	14.0 mm (0.6 in)	60 years	50 of 100 (Notable)
18 August 2012	Beech Forest, AU	daily rain	51.0 mm (2.0 in)	15.7 mm (0.6 in)	87 years	50 of 100 (Notable)
18 August 2012	Penshurst (the Gums), AU	daily rain	27.0 mm (1.1 in)	11.8 mm (0.5 in)	66 years	50 of 100 (Notable)
18 August 2012	Penza, RU	all-time rain	103.2 mm (4.1 in)	3.0 mm (0.12 in)	64 years	50 of 100 (Notable)
18 August 2012	Rison, US	daily low max	26.7 C (80.1 F)	3.3 C (5.9 F)	118 years	50 of 100 (Notable)
18 August 2012	Lavon Dam, US	daily rain	74.2 mm (2.9 in)	44.7 mm (1.8 in)	31 years	50 of 100 (Notable)
18 August 2012	Mirranatwa (Bowacka), AU	daily rain	28.0 mm (1.1 in)	11.2 mm (0.4 in)	73 years	49 of 100 (Notable)
18 August 2012	Nanning, CN	daily rain	108.6 mm (4.3 in)	53.7 mm (2.1 in)	49 years	49 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 2012

Records set or tied on this calendar date in each year from 1797 to 2012. 2012 had 1,247 records.

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

Records on 08-18 in each year
Year	Records
1797	2
1805	1
1816	1
1827	1
1829	1
1830	1
1833	1
1841	1
1844	1
1845	3
1846	1
1847	1
1849	1
1851	1
1852	1
1853	1
1854	2
1855	1
1856	1
1861	1
1864	2
1866	1
1868	2
1869	1
1870	2
1872	1
1873	1
1875	3
1876	1
1878	1
1879	2
1883	3
1885	3
1886	3
1887	3
1888	2
1889	1
1890	1
1891	2
1892	6
1893	4
1894	4
1895	1
1898	4
1899	6
1900	2
1901	10
1902	8
1903	6
1904	8
1905	10
1906	40
1907	7
1908	21
1909	24
1910	16
1911	11
1912	21
1913	43
1914	37
1915	60
1916	71
1917	70
1918	53
1919	34
1920	51
1921	39
1922	129
1923	90
1924	225
1925	300
1926	168
1927	269
1928	141
1929	181
1930	150
1931	241
1932	382
1933	431
1934	638
1935	424
1936	766
1937	308
1938	243
1939	381
1940	434
1941	467
1942	333
1943	738
1944	325
1945	400
1946	416
1947	958
1948	315
1949	393
1950	683
1951	355
1952	405
1953	323
1954	622
1955	795
1956	580
1957	380
1958	580
1959	537
1960	599
1961	415
1962	428
1963	760
1964	443
1965	525
1966	573
1967	623
1968	795
1969	530
1970	597
1971	381
1972	493
1973	734
1974	639
1975	844
1976	917
1977	1,112
1978	854
1979	1,309
1980	771
1981	1,386
1982	563
1983	1,420
1984	600
1985	765
1986	861
1987	1,609
1988	1,351
1989	952
1990	920
1991	533
1992	1,497
1993	706
1994	1,027
1995	1,882
1996	760
1997	1,191
1998	923
1999	888
2000	1,183
2001	1,036
2002	1,306
2003	860
2004	1,050
2005	865
2006	842
2007	1,116
2008	1,265
2009	839
2010	1,167
2011	1,239
2012	1,247
2013	752
2014	751
2015	880
2016	704
2017	565
2018	462
2019	615
2020	1,541
2021	1,118
2022	1,236
2023	1,094
2024	696
2025	455
2026	545

Download the Data

Data for records on 2012-08-18: 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 10	886
10 to 20	64
20 to 30	20
30 to 40	8
40 to 50	3
50 to 60	1
60 to 70	1