Weather Records on 18 August 2004

1,050 weather records were set or tied worldwide on 18 August 2004. Highest significance: Snake Rvr, US.

Key Facts for 18 August 2004

On 18 August 2004, 1,050 weather records were set or tied at long-record stations worldwide.
382 were record highs and 347 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 23 monthly and 1,023 daily.
Snake Rvr set a daily record precipitation of 32.0 mm (1.3 in) on 18 August 2004.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 437 records.

Record Map

1,050 stations

1,050 station records on 18 August 2004 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 2004: highest significance records shown on the map
Station	Country	Type	Value	Significance
Snake Rvr	United States	Record daily precipitation	32.0 mm (1.3 in)	65 of 100 (Major)
Hollister	United States	Record daily precipitation	31.8 mm (1.3 in)	63 of 100 (Major)
Robert Lee 4WSW	United States	Record daily precipitation	50.8 mm (2.0 in)	63 of 100 (Major)
Lander AP	United States	Record daily precipitation	55.9 mm (2.2 in)	62 of 100 (Major)
Colville	United States	Record daily precipitation	48.3 mm (1.9 in)	60 of 100 (Major)
Highland Home	United States	Record low minimum temperature	13.9 C (57.0 F)	57 of 100 (Notable)
Balmoral	United Kingdom	Record daily precipitation	48.1 mm (1.9 in)	56 of 100 (Notable)
Toulon	United States	Record daily precipitation	83.8 mm (3.3 in)	55 of 100 (Notable)
Montcornet	France	Record daily precipitation	38.0 mm (1.5 in)	54 of 100 (Notable)
San Marcos	Mexico	Record low minimum temperature	15.0 C (59.0 F)	54 of 100 (Notable)
Aikawa	Japan	Record daily precipitation	111.0 mm (4.4 in)	53 of 100 (Notable)
Lerwick	United Kingdom	Record daily precipitation	63.6 mm (2.5 in)	53 of 100 (Notable)
Augusta	United States	Record daily precipitation	33.0 mm (1.3 in)	53 of 100 (Notable)
Wajima	Japan	Record daily precipitation	120.9 mm (4.8 in)	52 of 100 (Notable)
Newton Rigg	United Kingdom	Record daily precipitation	28.4 mm (1.1 in)	52 of 100 (Notable)
Laurel	United States	Record low minimum temperature	15.0 C (59.0 F)	52 of 100 (Notable)
Andrews	United States	Record daily precipitation	39.4 mm (1.6 in)	52 of 100 (Notable)
Kurrajong Heights (Bells Line	Australia	Record daily precipitation	34.8 mm (1.4 in)	51 of 100 (Notable)
Sydney (Observatory Hill)	Australia	Record daily precipitation	105.4 mm (4.1 in)	51 of 100 (Notable)
Riverview Observatory	Australia	Record daily precipitation	71.6 mm (2.8 in)	51 of 100 (Notable)
Heibloem (L)	Netherlands	Record daily precipitation	55.1 mm (2.2 in)	51 of 100 (Notable)
Ft Collins	United States	Record daily precipitation	26.9 mm (1.1 in)	51 of 100 (Notable)
Wisdom	United States	Record daily precipitation	25.1 mm (1.0 in)	49 of 100 (Notable)
Geldern-Walbeck	Germany	Record daily precipitation	36.8 mm (1.4 in)	48 of 100 (Notable)
Wetumpka	United States	Record low minimum temperature	15.6 C (60.1 F)	48 of 100 (Notable)
Matanuska Exp Farm	United States	Record high maximum temperature	28.9 C (84.0 F)	48 of 100 (Notable)
Braemar	United Kingdom	Record daily precipitation	32.5 mm (1.3 in)	47 of 100 (Notable)
Cromer Golf Club	Australia	Record daily precipitation	46.8 mm (1.8 in)	46 of 100 (Notable)
Petrozawodsk	Russia	Record daily precipitation	37.3 mm (1.5 in)	46 of 100 (Notable)
New Roads 5 NE	United States	Record low minimum temperature	14.4 C (57.9 F)	45 of 100 (Notable)
Black Mtn 2 W	United States	Record daily precipitation	76.5 mm (3.0 in)	45 of 100 (Notable)
Scipio	United States	Record high minimum temperature	20.6 C (69.1 F)	45 of 100 (Notable)
Sitka AP	United States	Record high minimum temperature	16.1 C (61.0 F)	44 of 100 (Notable)
Bartow 1SE	United States	Record low minimum temperature	18.3 C (64.9 F)	43 of 100 (Notable)
Castlewood	United States	Record low minimum temperature	1.7 C (35.1 F)	43 of 100 (Notable)
Hamilton	United States	Record daily precipitation	94.5 mm (3.7 in)	43 of 100 (Notable)
Vestervig	Denmark	Record daily precipitation	27.1 mm (1.1 in)	42 of 100 (Notable)
Incheon	Korea, South	Record low minimum temperature	11.7 C (53.1 F)	42 of 100 (Notable)
Semej	Kazakhstan	Record high minimum temperature	20.7 C (69.3 F)	42 of 100 (Notable)
Middleburg	United States	Record daily precipitation	57.2 mm (2.3 in)	42 of 100 (Notable)
Hazlehurst	United States	Record daily precipitation	67.6 mm (2.7 in)	42 of 100 (Notable)
Lake Arthur 7 SW	United States	Record low minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Waynesboro 2 W	United States	Record low maximum temperature	27.2 C (81.0 F)	42 of 100 (Notable)
Gallatin Gateway 10SSW	United States	Record daily precipitation	47.2 mm (1.9 in)	42 of 100 (Notable)
Lawn	United States	Record daily precipitation	95.8 mm (3.8 in)	42 of 100 (Notable)
McKinley Park	United States	Record high maximum temperature	29.4 C (84.9 F)	42 of 100 (Notable)
Mosman (Bapaume Road)	Australia	Record daily precipitation	110.0 mm (4.3 in)	41 of 100 (Notable)
Maizuru Reg Met HQ	Japan	Record daily precipitation	77.5 mm (3.1 in)	41 of 100 (Notable)
Monteagle	United States	Record low minimum temperature	9.4 C (48.9 F)	41 of 100 (Notable)
Savannah 6 SW	United States	Record low minimum temperature	10.6 C (51.1 F)	41 of 100 (Notable)
Elkhorn	United States	Record low minimum temperature	11.7 C (53.1 F)	41 of 100 (Notable)
Meridian Key Fld	United States	Record low minimum temperature	13.3 C (55.9 F)	41 of 100 (Notable)
Kotzebue AP	United States	Record high maximum temperature	24.4 C (75.9 F)	41 of 100 (Notable)
Reisjarvi Levonpera	Finland	Record daily precipitation	30.0 mm (1.2 in)	40 of 100 (Notable)
Stormont Castle	United Kingdom	Record daily precipitation	32.1 mm (1.3 in)	40 of 100 (Notable)
Kinloss	United Kingdom	Record low minimum temperature	0.0 C (32.0 F)	40 of 100 (Notable)
Picayune	United States	Record low minimum temperature	14.4 C (57.9 F)	40 of 100 (Notable)
Mobile	United States	Record low minimum temperature	18.3 C (64.9 F)	40 of 100 (Notable)
Sydney Botanic Gardens	Australia	Record daily precipitation	101.6 mm (4.0 in)	39 of 100 (Notable)
Grenfell (Quondong Rd)	Australia	Record daily precipitation	30.7 mm (1.2 in)	39 of 100 (Notable)

Counts by Type and Timescale

1,050 records

Records set or tied on 18 August 2004 by type: Highest daily maximum 137, Lowest daily maximum 98, Highest daily minimum 245, Lowest daily minimum 249, Heaviest daily rainfall 321.

Records on 18 August 2004 by type
Record type	Records
Highest daily maximum	137
Lowest daily maximum	98
Highest daily minimum	245
Lowest daily minimum	249
Heaviest daily rainfall	321
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 2004 by timescale: all-time 4, monthly 23, daily 1,023.

How Much Records Were Beaten By

803 broken records

Margins by which the 803 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 94.9. Ties are not counted.

Top 20 by Significance

18 August 2004

Top 20 records on 18 August 2004 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 2004	Snake Rvr, US	daily rain	32.0 mm (1.3 in)	14.7 mm (0.6 in)	92 years	65 of 100 (Major)
18 August 2004	Hollister, US	daily rain	31.8 mm (1.3 in)	22.7 mm (0.9 in)	49 years	63 of 100 (Major)
18 August 2004	Robert Lee 4WSW, US	daily rain	50.8 mm (2.0 in)	38.9 mm (1.5 in)	94 years	63 of 100 (Major)
18 August 2004	Lander AP, US	monthly rain	55.9 mm (2.2 in)	30.5 mm (1.2 in)	24 years	62 of 100 (Major)
18 August 2004	Colville, US	monthly rain	48.3 mm (1.9 in)	7.2 mm (0.28 in)	96 years	60 of 100 (Major)
18 August 2004	Highland Home, US	daily low min	13.9 C (57.0 F)	3.3 C (5.9 F)	97 years	57 of 100 (Notable)
18 August 2004	Balmoral, GB	daily rain	48.1 mm (1.9 in)	29.6 mm (1.2 in)	43 years	56 of 100 (Notable)
18 August 2004	Toulon, US	daily rain	83.8 mm (3.3 in)	54.1 mm (2.1 in)	37 years	55 of 100 (Notable)
18 August 2004	Montcornet, FR	daily rain	38.0 mm (1.5 in)	10.8 mm (0.4 in)	97 years	54 of 100 (Notable)
18 August 2004	San Marcos, MX	daily low min	15.0 C (59.0 F)	5.0 C (9.0 F)	37 years	54 of 100 (Notable)
18 August 2004	Aikawa, JP	daily rain	111.0 mm (4.4 in)	72.5 mm (2.9 in)	46 years	53 of 100 (Notable)
18 August 2004	Lerwick, GB	daily rain	63.6 mm (2.5 in)	32.6 mm (1.3 in)	22 years	53 of 100 (Notable)
18 August 2004	Augusta, US	daily rain	33.0 mm (1.3 in)	12.2 mm (0.5 in)	92 years	53 of 100 (Notable)
18 August 2004	Wajima, JP	daily rain	120.9 mm (4.8 in)	94.9 mm (3.7 in)	34 years	52 of 100 (Notable)
18 August 2004	Newton Rigg, GB	daily rain	28.4 mm (1.1 in)	13.2 mm (0.5 in)	74 years	52 of 100 (Notable)
18 August 2004	Laurel, US	daily low min	15.0 C (59.0 F)	2.8 C (5.0 F)	91 years	52 of 100 (Notable)
18 August 2004	Andrews, US	daily rain	39.4 mm (1.6 in)	34.6 mm (1.4 in)	32 years	52 of 100 (Notable)
18 August 2004	Kurrajong Heights (Bells Line, AU	daily rain	34.8 mm (1.4 in)	17.0 mm (0.7 in)	104 years	51 of 100 (Notable)
18 August 2004	Sydney (Observatory Hill), AU	daily rain	105.4 mm (4.1 in)	65.8 mm (2.6 in)	6 years	51 of 100 (Notable)
18 August 2004	Riverview Observatory, AU	daily rain	71.6 mm (2.8 in)	56.3 mm (2.2 in)	6 years	51 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 2004

Records set or tied on this calendar date in each year from 1797 to 2004. 2004 had 1,050 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 2004-08-18: 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 2026-10-16 (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 20	766
20 to 40	25
40 to 60	9
60 to 80	2
80 to 100	1