Weather Records on 15 August 2011

770 weather records were set or tied worldwide on 15 August 2011. Highest significance: Seabrook Farms, US.

Key Facts for 15 August 2011

On 15 August 2011, 770 weather records were set or tied at long-record stations worldwide.
362 were record highs and 121 were record lows, counting maximum and minimum temperature.
By timescale, 7 were all-time records, 26 monthly and 737 daily.
Seabrook Farms set an all-time record daily precipitation of 270.3 mm (10.6 in) on 15 August 2011.
Across 168 earlier years (1793 to 2026) the same calendar date averaged 453 records.

Record Map

770 stations

770 station records on 15 August 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 August 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Seabrook Farms	United States	Record daily precipitation	270.3 mm (10.6 in)	84 of 100 (Exceptional)
Ostas I Hegra	Norway	Record daily precipitation	71.7 mm (2.8 in)	80 of 100 (Exceptional)
Dover	United States	Record daily precipitation	117.3 mm (4.6 in)	78 of 100 (Major)
Saginaw #3	United States	Record daily precipitation	73.9 mm (2.9 in)	67 of 100 (Major)
Walnut Canyon Nm	United States	Record daily precipitation	51.1 mm (2.0 in)	64 of 100 (Major)
Traneberg	Sweden	Record daily precipitation	37.4 mm (1.5 in)	60 of 100 (Major)
Oberlin	United States	Record daily precipitation	55.9 mm (2.2 in)	59 of 100 (Notable)
Utgard	Norway	Record daily precipitation	51.0 mm (2.0 in)	58 of 100 (Notable)
Warsaw 6 SW	United States	Record daily precipitation	69.1 mm (2.7 in)	56 of 100 (Notable)
Tooma	Estonia	Record daily precipitation	43.2 mm (1.7 in)	54 of 100 (Notable)
Mt Carmel	United States	Record daily precipitation	77.0 mm (3.0 in)	53 of 100 (Notable)
Mohonk Lake	United States	Record daily precipitation	47.2 mm (1.9 in)	53 of 100 (Notable)
Lucknow/Amausi	India	Record daily precipitation	144.0 mm (5.7 in)	52 of 100 (Notable)
Bakersville	United States	Record daily precipitation	104.4 mm (4.1 in)	51 of 100 (Notable)
Beltsville	United States	Record daily precipitation	73.9 mm (2.9 in)	51 of 100 (Notable)
Hightstown 2 W	United States	Record daily precipitation	80.8 mm (3.2 in)	51 of 100 (Notable)
Saxton 1W	United States	Record daily precipitation	47.5 mm (1.9 in)	50 of 100 (Notable)
Laurel 3 W	United States	Record daily precipitation	35.1 mm (1.4 in)	48 of 100 (Notable)
Blackwells Mills	United States	Record daily precipitation	78.7 mm (3.1 in)	48 of 100 (Notable)
Mc Leod 3 E	United States	Record daily precipitation	37.8 mm (1.5 in)	48 of 100 (Notable)
Buholmrasa Fyr	Norway	Record daily precipitation	40.0 mm (1.6 in)	47 of 100 (Notable)
Munarra	Australia	Record daily precipitation	26.4 mm (1.0 in)	46 of 100 (Notable)
Bangdalen	Norway	Record daily precipitation	42.0 mm (1.7 in)	46 of 100 (Notable)
Little Falls City Rsch	United States	Record daily precipitation	33.3 mm (1.3 in)	46 of 100 (Notable)
Jonsberg Landbruksskole	Norway	Record daily precipitation	48.0 mm (1.9 in)	45 of 100 (Notable)
Freehold-Marlboro	United States	Record daily precipitation	71.6 mm (2.8 in)	45 of 100 (Notable)
New Beith	Australia	Record daily precipitation	33.4 mm (1.3 in)	44 of 100 (Notable)
Stevenson Dam	United States	Record daily precipitation	63.0 mm (2.5 in)	44 of 100 (Notable)
Aunet	Norway	Record daily precipitation	63.8 mm (2.5 in)	43 of 100 (Notable)
Valdalen	Norway	Record daily precipitation	72.5 mm (2.9 in)	43 of 100 (Notable)
Rangely 1E	United States	Record low maximum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Bismarck	United States	Record daily precipitation	46.2 mm (1.8 in)	43 of 100 (Notable)
Turkestan	Kazakhstan	Record high minimum temperature	28.0 C (82.4 F)	42 of 100 (Notable)
Rena - Haugedalen	Norway	Record daily precipitation	53.3 mm (2.1 in)	42 of 100 (Notable)
Danevang 1 W	United States	Record high maximum temperature	38.3 C (100.9 F)	42 of 100 (Notable)
Concord ASOS	United States	Record daily precipitation	55.6 mm (2.2 in)	42 of 100 (Notable)
Asahikawa	Japan	Record daily precipitation	67.1 mm (2.6 in)	41 of 100 (Notable)
Vaernes	Norway	Record daily precipitation	59.2 mm (2.3 in)	41 of 100 (Notable)
Overhalla - Unnset	Norway	Record daily precipitation	40.3 mm (1.6 in)	41 of 100 (Notable)
Raymondville	United States	Record daily precipitation	67.6 mm (2.7 in)	41 of 100 (Notable)
Peru	United States	Record daily precipitation	32.3 mm (1.3 in)	41 of 100 (Notable)
Sines Deep Creek	United States	Record daily precipitation	41.1 mm (1.6 in)	40 of 100 (Notable)
Hooker 12 NNW	United States	Record daily precipitation	57.4 mm (2.3 in)	40 of 100 (Notable)
Huntingdon	United States	Record daily precipitation	58.4 mm (2.3 in)	40 of 100 (Notable)
Coronado Trail	United States	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Yeneka	Mexico	Record high minimum temperature	32.8 C (91.0 F)	39 of 100 (Notable)
Erikstad	Sweden	Record daily precipitation	30.4 mm (1.2 in)	39 of 100 (Notable)
Torsby	Sweden	Record daily precipitation	36.9 mm (1.5 in)	39 of 100 (Notable)
Glenwood Spgs #2	United States	Record low maximum temperature	21.1 C (70.0 F)	39 of 100 (Notable)
O'Neill	United States	Record daily precipitation	73.4 mm (2.9 in)	39 of 100 (Notable)
Conshohocken	United States	Record daily precipitation	39.1 mm (1.5 in)	39 of 100 (Notable)
Manila	United States	Record high minimum temperature	16.1 C (61.0 F)	39 of 100 (Notable)
Pavillion	United States	Record high minimum temperature	22.8 C (73.0 F)	39 of 100 (Notable)
Ushibuka	Japan	Record daily precipitation	65.0 mm (2.6 in)	38 of 100 (Notable)
Alvarado (Dge)	Mexico	Record daily precipitation	115.8 mm (4.6 in)	38 of 100 (Notable)
Nord Odal	Norway	Record daily precipitation	50.4 mm (2.0 in)	38 of 100 (Notable)
Ljusnedal	Sweden	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Hornell Almond Dam	United States	Record daily precipitation	42.2 mm (1.7 in)	38 of 100 (Notable)
N Foster 1 E	United States	Record daily precipitation	89.2 mm (3.5 in)	38 of 100 (Notable)
Mc Cook	United States	Record daily precipitation	89.4 mm (3.5 in)	37 of 100 (Notable)

Counts by Type and Timescale

770 records

Records set or tied on 15 August 2011 by type: Highest daily maximum 177, Lowest daily maximum 64, Highest daily minimum 185, Lowest daily minimum 57, Heaviest daily rainfall 287.

Records on 15 August 2011 by type
Record type	Records
Highest daily maximum	177
Lowest daily maximum	64
Highest daily minimum	185
Lowest daily minimum	57
Heaviest daily rainfall	287
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 August 2011 by timescale: all-time 7, monthly 26, daily 737.

How Much Records Were Beaten By

587 broken records

Margins by which the 587 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 103.4. Ties are not counted.

Top 20 by Significance

15 August 2011

Top 20 records on 15 August 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 August 2011	Seabrook Farms, US	all-time rain	270.3 mm (10.6 in)	103.4 mm (4.1 in)	60 years	84 of 100 (Exceptional)
15 August 2011	Ostas I Hegra, NO	daily rain	71.7 mm (2.8 in)	44.6 mm (1.8 in)	108 years	80 of 100 (Exceptional)
15 August 2011	Dover, US	daily rain	117.3 mm (4.6 in)	77.2 mm (3.0 in)	100 years	78 of 100 (Major)
15 August 2011	Saginaw #3, US	monthly rain	73.9 mm (2.9 in)	22.3 mm (0.9 in)	85 years	67 of 100 (Major)
15 August 2011	Walnut Canyon Nm, US	daily rain	51.1 mm (2.0 in)	37.9 mm (1.5 in)	49 years	64 of 100 (Major)
15 August 2011	Traneberg, SE	daily rain	37.4 mm (1.5 in)	24.3 mm (1.0 in)	56 years	60 of 100 (Major)
15 August 2011	Oberlin, US	daily rain	55.9 mm (2.2 in)	22.1 mm (0.9 in)	101 years	59 of 100 (Notable)
15 August 2011	Utgard, NO	monthly rain	51.0 mm (2.0 in)	15.5 mm (0.6 in)	44 years	58 of 100 (Notable)
15 August 2011	Warsaw 6 SW, US	daily rain	69.1 mm (2.7 in)	48.3 mm (1.9 in)	33 years	56 of 100 (Notable)
15 August 2011	Tooma, EE	daily rain	43.2 mm (1.7 in)	14.8 mm (0.6 in)	88 years	54 of 100 (Notable)
15 August 2011	Mt Carmel, US	daily rain	77.0 mm (3.0 in)	46.8 mm (1.8 in)	57 years	53 of 100 (Notable)
15 August 2011	Mohonk Lake, US	daily rain	47.2 mm (1.9 in)	21.3 mm (0.8 in)	105 years	53 of 100 (Notable)
15 August 2011	Lucknow/Amausi, IN	daily rain	144.0 mm (5.7 in)	75.1 mm (3.0 in)	52 years	52 of 100 (Notable)
15 August 2011	Bakersville, US	daily rain	104.4 mm (4.1 in)	55.6 mm (2.2 in)	38 years	51 of 100 (Notable)
15 August 2011	Beltsville, US	daily rain	73.9 mm (2.9 in)	50.8 mm (2.0 in)	56 years	51 of 100 (Notable)
15 August 2011	Hightstown 2 W, US	daily rain	80.8 mm (3.2 in)	27.0 mm (1.1 in)	84 years	51 of 100 (Notable)
15 August 2011	Saxton 1W, US	daily rain	47.5 mm (1.9 in)	32.3 mm (1.3 in)	44 years	50 of 100 (Notable)
15 August 2011	Laurel 3 W, US	daily rain	35.1 mm (1.4 in)	16.0 mm (0.6 in)	96 years	48 of 100 (Notable)
15 August 2011	Blackwells Mills, US	daily rain	78.7 mm (3.1 in)	66.5 mm (2.6 in)	16 years	48 of 100 (Notable)
15 August 2011	Mc Leod 3 E, US	daily rain	37.8 mm (1.5 in)	16.7 mm (0.7 in)	84 years	48 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 2011

Records set or tied on this calendar date in each year from 1793 to 2011. 2011 had 770 records.

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

Records on 08-15 in each year
Year	Records
1793	2
1802	1
1805	1
1812	1
1821	1
1838	2
1839	1
1841	1
1844	1
1845	3
1852	1
1854	1
1856	1
1858	1
1861	3
1867	1
1868	2
1869	1
1873	2
1875	1
1876	2
1877	1
1878	1
1879	1
1880	3
1881	2
1882	2
1883	1
1884	2
1885	3
1886	1
1887	1
1888	3
1890	2
1891	2
1892	3
1893	3
1895	1
1896	9
1897	3
1898	1
1899	2
1900	6
1901	5
1902	10
1903	5
1904	17
1905	26
1906	8
1907	14
1908	15
1909	30
1910	16
1911	26
1912	34
1913	42
1914	11
1915	26
1916	223
1917	32
1918	23
1919	22
1920	59
1921	55
1922	86
1923	116
1924	220
1925	91
1926	115
1927	223
1928	271
1929	586
1930	274
1931	351
1932	368
1933	268
1934	992
1935	414
1936	867
1937	574
1938	681
1939	450
1940	372
1941	289
1942	377
1943	426
1944	610
1945	433
1946	285
1947	559
1948	366
1949	559
1950	317
1951	597
1952	596
1953	449
1954	481
1955	539
1956	390
1957	355
1958	1,092
1959	515
1960	417
1961	704
1962	1,052
1963	972
1964	1,185
1965	535
1966	340
1967	687
1968	1,002
1969	583
1970	382
1971	899
1972	613
1973	499
1974	512
1975	490
1976	1,345
1977	550
1978	841
1979	1,788
1980	745
1981	588
1982	479
1983	955
1984	622
1985	915
1986	1,283
1987	1,098
1988	1,479
1989	495
1990	758
1991	778
1992	1,638
1993	831
1994	1,073
1995	1,298
1996	929
1997	927
1998	861
1999	956
2000	932
2001	1,254
2002	1,307
2003	1,248
2004	1,424
2005	1,067
2006	923
2007	1,317
2008	964
2009	1,038
2010	1,622
2011	770
2012	654
2013	711
2014	583
2015	759
2016	707
2017	532
2018	328
2019	435
2020	1,327
2021	900
2022	692
2023	1,414
2024	729
2025	772
2026	975

Download the Data

Data for records on 2011-08-15: 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).

Margin	Records
0 to 20	536
20 to 40	36
40 to 60	9
60 to 80	5
80 to 100	0
100 to 120	1