Weather Records on 18 August 2007

1,116 weather records were set or tied worldwide on 18 August 2007. Highest significance: Emmetsburg, US.

Key Facts for 18 August 2007

On 18 August 2007, 1,116 weather records were set or tied at long-record stations worldwide.
638 were record highs and 237 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 45 monthly and 1,066 daily.
Emmetsburg set an all-time record daily precipitation of 228.6 mm (9.0 in) on 18 August 2007.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 437 records.

Record Map

1,116 stations

1,116 station records on 18 August 2007 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 2007: highest significance records shown on the map
Station	Country	Type	Value	Significance
Emmetsburg	United States	Record daily precipitation	228.6 mm (9.0 in)	87 of 100 (Exceptional)
Faulkton	United States	Record daily precipitation	95.8 mm (3.8 in)	80 of 100 (Exceptional)
Rochester Intl AP	United States	Record daily precipitation	131.1 mm (5.2 in)	78 of 100 (Major)
Hobart Muni AP	United States	Record daily precipitation	84.3 mm (3.3 in)	75 of 100 (Major)
Pandale 1 N	United States	Record daily precipitation	252.5 mm (9.9 in)	68 of 100 (Major)
Redwood Falls Muni AP	United States	Record daily precipitation	80.3 mm (3.2 in)	66 of 100 (Major)
Coloso	Puerto Rico [United States]	Record high minimum temperature	28.3 C (82.9 F)	65 of 100 (Major)
Hamlin 1SW	United States	Record daily precipitation	96.5 mm (3.8 in)	65 of 100 (Major)
Snyder	United States	Record daily precipitation	109.2 mm (4.3 in)	65 of 100 (Major)
Bowie	United States	Record high minimum temperature	27.8 C (82.0 F)	62 of 100 (Major)
Milford 4 NW	United States	Record daily precipitation	97.3 mm (3.8 in)	62 of 100 (Major)
Hermosa 3 SSW	United States	Record daily precipitation	103.1 mm (4.1 in)	62 of 100 (Major)
Ballinger 2 NW	United States	Record daily precipitation	78.7 mm (3.1 in)	62 of 100 (Major)
Port O'Connor	United States	Record daily precipitation	127.0 mm (5.0 in)	59 of 100 (Notable)
Forsan	United States	Record daily precipitation	130.0 mm (5.1 in)	58 of 100 (Notable)
Knapp 2 SW	United States	Record daily precipitation	141.0 mm (5.6 in)	58 of 100 (Notable)
Sheldon	United States	Record daily precipitation	68.6 mm (2.7 in)	56 of 100 (Notable)
Webster City	United States	Record daily precipitation	118.6 mm (4.7 in)	56 of 100 (Notable)
Sterling City	United States	Record daily precipitation	63.5 mm (2.5 in)	56 of 100 (Notable)
Wisconsin Dells Wwtp	United States	Record daily precipitation	94.0 mm (3.7 in)	56 of 100 (Notable)
Wagga Wagga (Berrillee)	Australia	Record daily precipitation	34.0 mm (1.3 in)	55 of 100 (Notable)
Rotan	United States	Record daily precipitation	113.5 mm (4.5 in)	55 of 100 (Notable)
Sonora	United States	Record daily precipitation	76.2 mm (3.0 in)	55 of 100 (Notable)
Algona	United States	Record daily precipitation	94.0 mm (3.7 in)	53 of 100 (Notable)
Robert Lee 4WSW	United States	Record daily precipitation	161.0 mm (6.3 in)	53 of 100 (Notable)
Ashley	United States	Record daily precipitation	55.9 mm (2.2 in)	52 of 100 (Notable)
Kailua 446	United States	Record low maximum temperature	21.1 C (70.0 F)	52 of 100 (Notable)
Madison Dane Co Rgnl AP	United States	Record daily precipitation	86.1 mm (3.4 in)	52 of 100 (Notable)
Primghar	United States	Record daily precipitation	84.1 mm (3.3 in)	51 of 100 (Notable)
Dayton 1 WSW	United States	Record low minimum temperature	-1.1 C (30.0 F)	51 of 100 (Notable)
Crosbyton	United States	Record daily precipitation	48.3 mm (1.9 in)	50 of 100 (Notable)
Tubuai	French Polynesia	Record daily precipitation	145.0 mm (5.7 in)	49 of 100 (Notable)
Lake Park 3SSE	United States	Record daily precipitation	133.9 mm (5.3 in)	49 of 100 (Notable)
Montevideo 1SW	United States	Record daily precipitation	50.8 mm (2.0 in)	49 of 100 (Notable)
Water Valley 11 NNE	United States	Record daily precipitation	112.3 mm (4.4 in)	49 of 100 (Notable)
La Crosse Muni AP	United States	Record daily precipitation	102.9 mm (4.1 in)	49 of 100 (Notable)
San Agustin Metziquititlan	Mexico	Record daily precipitation	38.9 mm (1.5 in)	47 of 100 (Notable)
Marshall	United States	Record daily precipitation	83.1 mm (3.3 in)	47 of 100 (Notable)
Jayton	United States	Record daily precipitation	58.4 mm (2.3 in)	47 of 100 (Notable)
San Angelo	United States	Record daily precipitation	46.5 mm (1.8 in)	47 of 100 (Notable)
Rovaniemi Misi	Finland	Record daily precipitation	36.3 mm (1.4 in)	46 of 100 (Notable)
Iowa Falls	United States	Record daily precipitation	57.2 mm (2.3 in)	46 of 100 (Notable)
Custer	United States	Record daily precipitation	55.4 mm (2.2 in)	46 of 100 (Notable)
Marshall	United States	Record high minimum temperature	27.8 C (82.0 F)	46 of 100 (Notable)
New Braunfels	United States	Record high minimum temperature	27.2 C (81.0 F)	46 of 100 (Notable)
Lone Rock Tri Co AP	United States	Record daily precipitation	97.5 mm (3.8 in)	46 of 100 (Notable)
Mayaguez City	Puerto Rico [United States]	Record high minimum temperature	25.6 C (78.1 F)	45 of 100 (Notable)
Spur	United States	Record daily precipitation	96.5 mm (3.8 in)	45 of 100 (Notable)
Sisseton	United States	Record low maximum temperature	16.7 C (62.1 F)	44 of 100 (Notable)
Dumont	United States	Record daily precipitation	69.9 mm (2.8 in)	44 of 100 (Notable)
Stamford 1	United States	Record daily precipitation	123.2 mm (4.9 in)	44 of 100 (Notable)
Wetumpka	United States	Record high maximum temperature	38.9 C (102.0 F)	43 of 100 (Notable)
Conroe	United States	Record daily precipitation	57.9 mm (2.3 in)	43 of 100 (Notable)
Jindare	Australia	Record daily precipitation	42.0 mm (1.7 in)	42 of 100 (Notable)
San Martin Texmelucan Labasti	Mexico	Record low minimum temperature	2.8 C (37.0 F)	42 of 100 (Notable)
Glenlee	United Kingdom	Record daily precipitation	41.5 mm (1.6 in)	42 of 100 (Notable)
Benton	United States	Record high minimum temperature	24.4 C (75.9 F)	42 of 100 (Notable)
Big Rapids Wtp	United States	Record low maximum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Elephant Butte Dam	United States	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Hatch	United States	Record high maximum temperature	38.9 C (102.0 F)	42 of 100 (Notable)

Counts by Type and Timescale

1,116 records

Records set or tied on 18 August 2007 by type: Highest daily maximum 286, Lowest daily maximum 160, Highest daily minimum 352, Lowest daily minimum 77, Heaviest daily rainfall 241.

Records on 18 August 2007 by type
Record type	Records
Highest daily maximum	286
Lowest daily maximum	160
Highest daily minimum	352
Lowest daily minimum	77
Heaviest daily rainfall	241
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 2007 by timescale: all-time 5, monthly 45, daily 1,066.

How Much Records Were Beaten By

800 broken records

Margins by which the 800 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 170.2. Ties are not counted.

Top 20 by Significance

18 August 2007

Top 20 records on 18 August 2007 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 2007	Emmetsburg, US	all-time rain	228.6 mm (9.0 in)	66.0 mm (2.6 in)	56 years	87 of 100 (Exceptional)
18 August 2007	Faulkton, US	daily rain	95.8 mm (3.8 in)	61.5 mm (2.4 in)	102 years	80 of 100 (Exceptional)
18 August 2007	Rochester Intl AP, US	monthly rain	131.1 mm (5.2 in)	48.0 mm (1.9 in)	76 years	78 of 100 (Major)
18 August 2007	Hobart Muni AP, US	daily rain	84.3 mm (3.3 in)	66.5 mm (2.6 in)	86 years	75 of 100 (Major)
18 August 2007	Pandale 1 N, US	monthly rain	252.5 mm (9.9 in)	170.2 mm (6.7 in)	33 years	68 of 100 (Major)
18 August 2007	Redwood Falls Muni AP, US	daily rain	80.3 mm (3.2 in)	52.4 mm (2.1 in)	56 years	66 of 100 (Major)
18 August 2007	Coloso, PR	daily high min	28.3 C (82.9 F)	3.9 C (7.0 F)	92 years	65 of 100 (Major)
18 August 2007	Hamlin 1SW, US	daily rain	96.5 mm (3.8 in)	81.0 mm (3.2 in)	53 years	65 of 100 (Major)
18 August 2007	Snyder, US	daily rain	109.2 mm (4.3 in)	81.3 mm (3.2 in)	53 years	65 of 100 (Major)
18 August 2007	Bowie, US	daily high min	27.8 C (82.0 F)	5.6 C (10.1 F)	104 years	62 of 100 (Major)
18 August 2007	Milford 4 NW, US	daily rain	97.3 mm (3.8 in)	63.5 mm (2.5 in)	46 years	62 of 100 (Major)
18 August 2007	Hermosa 3 SSW, US	monthly rain	103.1 mm (4.1 in)	33.8 mm (1.3 in)	8 years	62 of 100 (Major)
18 August 2007	Ballinger 2 NW, US	daily rain	78.7 mm (3.1 in)	63.5 mm (2.5 in)	62 years	62 of 100 (Major)
18 August 2007	Port O'Connor, US	daily rain	127.0 mm (5.0 in)	97.3 mm (3.8 in)	45 years	59 of 100 (Notable)
18 August 2007	Forsan, US	monthly rain	130.0 mm (5.1 in)	47.2 mm (1.9 in)	34 years	58 of 100 (Notable)
18 August 2007	Knapp 2 SW, US	monthly rain	141.0 mm (5.6 in)	52.6 mm (2.1 in)	32 years	58 of 100 (Notable)
18 August 2007	Sheldon, US	daily rain	68.6 mm (2.7 in)	36.6 mm (1.4 in)	69 years	56 of 100 (Notable)
18 August 2007	Webster City, US	daily rain	118.6 mm (4.7 in)	89.4 mm (3.5 in)	20 years	56 of 100 (Notable)
18 August 2007	Sterling City, US	daily rain	63.5 mm (2.5 in)	38.1 mm (1.5 in)	78 years	56 of 100 (Notable)
18 August 2007	Wisconsin Dells Wwtp, US	daily rain	94.0 mm (3.7 in)	64.8 mm (2.6 in)	28 years	56 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 2007

Records set or tied on this calendar date in each year from 1797 to 2007. 2007 had 1,116 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	1,237
2023	1,094
2024	696
2025	455
2026	545

Download the Data

Data for records on 2007-08-18: 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 2026-10-17 (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 25	742
25 to 50	33
50 to 75	17
75 to 100	5
100 to 125	2
125 to 150	0
150 to 175	1