Weather Records on 15 August 2009

1,038 weather records were set or tied worldwide on 15 August 2009. Highest significance: Washington Is, US.

Key Facts for 15 August 2009

On 15 August 2009, 1,038 weather records were set or tied at long-record stations worldwide.
641 were record highs and 220 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 56 monthly and 980 daily.
Washington Is set an all-time record daily precipitation of 141.5 mm (5.6 in) on 15 August 2009.
Across 168 earlier years (1793 to 2026) the same calendar date averaged 451 records.

Record Map

1,038 stations

1,038 station records on 15 August 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 August 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Washington Is	United States	Record daily precipitation	141.5 mm (5.6 in)	69 of 100 (Major)
Big Falls	United States	Record daily precipitation	85.6 mm (3.4 in)	67 of 100 (Major)
Cheboygan	United States	Record daily precipitation	74.2 mm (2.9 in)	64 of 100 (Major)
Geilo	Norway	Record daily precipitation	34.3 mm (1.4 in)	57 of 100 (Notable)
Tarendo	Sweden	Record daily precipitation	41.9 mm (1.6 in)	56 of 100 (Notable)
Detour Village	United States	Record daily precipitation	38.9 mm (1.5 in)	56 of 100 (Notable)
Pellston Rgnl AP	United States	Record daily precipitation	62.5 mm (2.5 in)	54 of 100 (Notable)
Hebbronville	United States	Record high minimum temperature	30.0 C (86.0 F)	53 of 100 (Notable)
Pierre Rgnl AP	United States	Record daily precipitation	41.7 mm (1.6 in)	53 of 100 (Notable)
Bulken	Norway	Record daily precipitation	46.2 mm (1.8 in)	52 of 100 (Notable)
Pathfinder Dam	United States	Record low maximum temperature	17.2 C (63.0 F)	52 of 100 (Notable)
Mount Gambier Post Office	Australia	Record high maximum temperature	21.7 C (71.1 F)	51 of 100 (Notable)
Alta	United States	Record low minimum temperature	1.7 C (35.1 F)	49 of 100 (Notable)
Potrerillos	Mexico	Record low minimum temperature	10.6 C (51.1 F)	47 of 100 (Notable)
Gordon 6N	United States	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Robe Comparison	Australia	Record high maximum temperature	19.3 C (66.7 F)	46 of 100 (Notable)
Culbertson	United States	Record daily precipitation	43.7 mm (1.7 in)	46 of 100 (Notable)
Wagner	United States	Record daily precipitation	43.7 mm (1.7 in)	46 of 100 (Notable)
Hebbronville	United States	Record high maximum temperature	45.0 C (113.0 F)	46 of 100 (Notable)
South Pass City	United States	Record low maximum temperature	12.2 C (54.0 F)	44 of 100 (Notable)
Onaway 4N	United States	Record daily precipitation	95.0 mm (3.7 in)	42 of 100 (Notable)
Haigler	United States	Record low minimum temperature	7.8 C (46.0 F)	42 of 100 (Notable)
Roldal	Norway	Record daily precipitation	58.0 mm (2.3 in)	41 of 100 (Notable)
Anaconda	United States	Record low maximum temperature	13.9 C (57.0 F)	41 of 100 (Notable)
Richland	United States	Record low maximum temperature	21.7 C (71.1 F)	41 of 100 (Notable)
Imperial Beach Ream Fld NAS	United States	Record low minimum temperature	12.8 C (55.0 F)	40 of 100 (Notable)
Presa la Calera	Mexico	Record low minimum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
Ajojucar	Mexico	Record high maximum temperature	35.0 C (95.0 F)	39 of 100 (Notable)
Abjorsbraten	Norway	Record daily precipitation	25.1 mm (1.0 in)	39 of 100 (Notable)
Park Falls Dnr HQ	United States	Record high minimum temperature	20.6 C (69.1 F)	39 of 100 (Notable)
Sauda	Norway	Record daily precipitation	52.6 mm (2.1 in)	38 of 100 (Notable)
Ainsworth	United States	Record daily precipitation	42.9 mm (1.7 in)	38 of 100 (Notable)
Key West NAS	United States	Record daily precipitation	74.9 mm (2.9 in)	38 of 100 (Notable)
Albany	Australia	Record low maximum temperature	12.0 C (53.6 F)	37 of 100 (Notable)
Canton	Mexico	Record high minimum temperature	24.4 C (75.9 F)	37 of 100 (Notable)
Pinnacles Np	United States	Record low minimum temperature	-0.6 C (30.9 F)	37 of 100 (Notable)
Jerome	United States	Record low minimum temperature	4.4 C (39.9 F)	37 of 100 (Notable)
Goldbutte 7 N	United States	Record low maximum temperature	12.2 C (54.0 F)	37 of 100 (Notable)
Northam	Australia	Record low maximum temperature	13.3 C (55.9 F)	36 of 100 (Notable)
Bordeaux-Merignac	France	Record high maximum temperature	36.2 C (97.2 F)	36 of 100 (Notable)
Temascales	Mexico	Record high maximum temperature	25.6 C (78.1 F)	36 of 100 (Notable)
Redstone	United States	Record daily precipitation	45.7 mm (1.8 in)	36 of 100 (Notable)
Joseph	United States	Record low maximum temperature	15.0 C (59.0 F)	36 of 100 (Notable)
Atotonilco El Alto	Mexico	Record high maximum temperature	32.2 C (90.0 F)	35 of 100 (Notable)
Bolaos	Mexico	Record daily precipitation	52.1 mm (2.1 in)	35 of 100 (Notable)
Arkadelphia 2 N	United States	Record low minimum temperature	10.0 C (50.0 F)	35 of 100 (Notable)
Oconto	United States	Record daily precipitation	40.1 mm (1.6 in)	35 of 100 (Notable)
Tensleep 4NE	United States	Record daily precipitation	25.1 mm (1.0 in)	35 of 100 (Notable)
Alice Springs Airport	Australia	Record high minimum temperature	21.3 C (70.3 F)	34 of 100 (Routine)
Oodnadatta Airport	Australia	Record high maximum temperature	35.3 C (95.5 F)	34 of 100 (Routine)
Boulia Airport	Australia	Record high maximum temperature	35.4 C (95.7 F)	34 of 100 (Routine)
Ramos Arizpe (Smn)	Mexico	Record high maximum temperature	36.7 C (98.1 F)	34 of 100 (Routine)
Husnes	Norway	Record daily precipitation	64.6 mm (2.5 in)	34 of 100 (Routine)
Raymond Border STN	United States	Record daily precipitation	41.7 mm (1.6 in)	34 of 100 (Routine)
Ashland	United States	Record low minimum temperature	4.4 C (39.9 F)	34 of 100 (Routine)
Washington Sp	United States	Record high maximum temperature	43.9 C (111.0 F)	33 of 100 (Routine)
Fukue	Japan	Record daily precipitation	77.0 mm (3.0 in)	32 of 100 (Routine)
Ulgi	Mongolia	Record low maximum temperature	8.7 C (47.7 F)	32 of 100 (Routine)
Opstveit	Norway	Record daily precipitation	89.0 mm (3.5 in)	32 of 100 (Routine)
Joplin	United States	Record low maximum temperature	15.6 C (60.1 F)	32 of 100 (Routine)

Counts by Type and Timescale

1,038 records

Records set or tied on 15 August 2009 by type: Highest daily maximum 459, Lowest daily maximum 113, Highest daily minimum 182, Lowest daily minimum 107, Heaviest daily rainfall 177.

Records on 15 August 2009 by type
Record type	Records
Highest daily maximum	459
Lowest daily maximum	113
Highest daily minimum	182
Lowest daily minimum	107
Heaviest daily rainfall	177
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 August 2009 by timescale: all-time 2, monthly 56, daily 980.

How Much Records Were Beaten By

720 broken records

Margins by which the 720 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 60.2. Ties are not counted.

Top 20 by Significance

15 August 2009

Top 20 records on 15 August 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 August 2009	Washington Is, US	all-time rain	141.5 mm (5.6 in)	27.2 mm (1.1 in)	64 years	69 of 100 (Major)
15 August 2009	Big Falls, US	daily rain	85.6 mm (3.4 in)	60.2 mm (2.4 in)	64 years	67 of 100 (Major)
15 August 2009	Cheboygan, US	daily rain	74.2 mm (2.9 in)	43.7 mm (1.7 in)	50 years	64 of 100 (Major)
15 August 2009	Geilo, NO	daily rain	34.3 mm (1.4 in)	11.3 mm (0.4 in)	111 years	57 of 100 (Notable)
15 August 2009	Tarendo, SE	daily rain	41.9 mm (1.6 in)	31.8 mm (1.3 in)	39 years	56 of 100 (Notable)
15 August 2009	Detour Village, US	daily rain	38.9 mm (1.5 in)	17.3 mm (0.7 in)	100 years	56 of 100 (Notable)
15 August 2009	Pellston Rgnl AP, US	daily rain	62.5 mm (2.5 in)	34.3 mm (1.4 in)	50 years	54 of 100 (Notable)
15 August 2009	Hebbronville, US	daily high min	30.0 C (86.0 F)	4.4 C (7.9 F)	44 years	53 of 100 (Notable)
15 August 2009	Pierre Rgnl AP, US	daily rain	41.7 mm (1.6 in)	13.5 mm (0.5 in)	102 years	53 of 100 (Notable)
15 August 2009	Bulken, NO	daily rain	46.2 mm (1.8 in)	9.7 mm (0.38 in)	111 years	52 of 100 (Notable)
15 August 2009	Pathfinder Dam, US	daily low max	17.2 C (63.0 F)	4.5 C (8.1 F)	96 years	52 of 100 (Notable)
15 August 2009	Mount Gambier Post Office, AU	daily high max	21.7 C (71.1 F)	3.1 C (5.6 F)	99 years	51 of 100 (Notable)
15 August 2009	Alta, US	daily low min	1.7 C (35.1 F)	2.7 C (4.9 F)	103 years	49 of 100 (Notable)
15 August 2009	Potrerillos, MX	daily low min	10.6 C (51.1 F)	5.0 C (9.0 F)	34 years	47 of 100 (Notable)
15 August 2009	Gordon 6N, US	daily rain	41.4 mm (1.6 in)	11.9 mm (0.5 in)	80 years	47 of 100 (Notable)
15 August 2009	Robe Comparison, AU	daily high max	19.3 C (66.7 F)	1.2 C (2.2 F)	99 years	46 of 100 (Notable)
15 August 2009	Culbertson, US	daily rain	43.7 mm (1.7 in)	18.6 mm (0.7 in)	40 years	46 of 100 (Notable)
15 August 2009	Wagner, US	daily rain	43.7 mm (1.7 in)	14.5 mm (0.6 in)	88 years	46 of 100 (Notable)
15 August 2009	Hebbronville, US	daily high max	45.0 C (113.0 F)	3.3 C (5.9 F)	76 years	46 of 100 (Notable)
15 August 2009	South Pass City, US	daily low max	12.2 C (54.0 F)	3.4 C (6.1 F)	82 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

1793 to 2009

Records set or tied on this calendar date in each year from 1793 to 2009. 2009 had 1,038 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 2009-08-15: 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 2026-10-17 (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	675
10 to 20	33
20 to 30	4
30 to 40	4
40 to 50	2
50 to 60	1
60 to 70	1