Weather Records on 18 August 2003

860 weather records were set or tied worldwide on 18 August 2003. Highest significance: Konstantinovka, RU.

Key Facts for 18 August 2003

On 18 August 2003, 860 weather records were set or tied at long-record stations worldwide.
556 were record highs and 136 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 26 monthly and 832 daily.
Konstantinovka set a daily record precipitation of 73.7 mm (2.9 in) on 18 August 2003.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 438 records.

Record Map

860 stations

860 station records on 18 August 2003 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 2003: highest significance records shown on the map
Station	Country	Type	Value	Significance
Konstantinovka	Russia	Record daily precipitation	73.7 mm (2.9 in)	54 of 100 (Notable)
Houma	United States	Record daily precipitation	71.1 mm (2.8 in)	47 of 100 (Notable)
Roseau	United States	Record high maximum temperature	38.3 C (100.9 F)	45 of 100 (Notable)
Hatteras	United States	Record daily precipitation	102.9 mm (4.1 in)	45 of 100 (Notable)
Bjelasnica	Bosnia and Herzegovina	Record high minimum temperature	16.0 C (60.8 F)	44 of 100 (Notable)
Las Bayas	Mexico	Record low minimum temperature	-7.2 C (19.0 F)	44 of 100 (Notable)
Chiricahua Nm	United States	Record high minimum temperature	19.4 C (66.9 F)	44 of 100 (Notable)
Yerington	United States	Record high maximum temperature	41.1 C (106.0 F)	44 of 100 (Notable)
Grafton	United States	Record high minimum temperature	24.4 C (75.9 F)	44 of 100 (Notable)
Tizi Ouzou	Algeria	Record high minimum temperature	25.0 C (77.0 F)	43 of 100 (Notable)
Kall-Sistig	Germany	Record daily precipitation	31.5 mm (1.2 in)	43 of 100 (Notable)
Pokrovskaja	Russia	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
Lichtentanne	Germany	Record high minimum temperature	19.1 C (66.4 F)	42 of 100 (Notable)
Santo Domingo	Mexico	Record low minimum temperature	8.9 C (48.0 F)	42 of 100 (Notable)
Brunswick	United States	Record low minimum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Red Lake Indian Agcy	United States	Record high maximum temperature	35.0 C (95.0 F)	42 of 100 (Notable)
Belzoni	United States	Record high minimum temperature	27.8 C (82.0 F)	42 of 100 (Notable)
Chemnitz	Germany	Record high minimum temperature	19.0 C (66.2 F)	41 of 100 (Notable)
Newport	United States	Record high maximum temperature	38.9 C (102.0 F)	41 of 100 (Notable)
Westhope	United States	Record high minimum temperature	21.1 C (70.0 F)	41 of 100 (Notable)
Colville	United States	Record high maximum temperature	37.8 C (100.0 F)	41 of 100 (Notable)
Heinersreuth-Vollhof	Germany	Record high minimum temperature	17.8 C (64.0 F)	40 of 100 (Notable)
Izmail	Ukraine	Record high minimum temperature	20.8 C (69.4 F)	40 of 100 (Notable)
Mohall	United States	Record high maximum temperature	37.8 C (100.0 F)	40 of 100 (Notable)
Bjelasnica	Bosnia and Herzegovina	Record high maximum temperature	21.1 C (70.0 F)	39 of 100 (Notable)
Koln-Bonn	Germany	Record daily precipitation	36.6 mm (1.4 in)	39 of 100 (Notable)
Nikolskoye/Beringa Ostrov	Russia	Record high maximum temperature	17.0 C (62.6 F)	39 of 100 (Notable)
New Meadows Rs	United States	Record high maximum temperature	37.2 C (99.0 F)	39 of 100 (Notable)
Minot Exp STN	United States	Record high maximum temperature	38.9 C (102.0 F)	39 of 100 (Notable)
Bely Island	Russia	Record high minimum temperature	12.3 C (54.1 F)	38 of 100 (Notable)
Searchlight	United States	Record high minimum temperature	26.7 C (80.1 F)	38 of 100 (Notable)
Campbell	United States	Record high maximum temperature	37.2 C (99.0 F)	37 of 100 (Notable)
Fitzwilliam 2 W	United States	Record daily precipitation	32.5 mm (1.3 in)	37 of 100 (Notable)
Bad Lippspringe	Germany	Record daily precipitation	48.6 mm (1.9 in)	36 of 100 (Notable)
Turinsk	Russia	Record daily precipitation	47.1 mm (1.9 in)	36 of 100 (Notable)
Red Springs 1 SE	United States	Record daily precipitation	86.4 mm (3.4 in)	36 of 100 (Notable)
Buffalo Bill Dam	United States	Record high maximum temperature	33.9 C (93.0 F)	36 of 100 (Notable)
Vouziers	France	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
San Diego Curupatzeo	Mexico	Record low minimum temperature	11.7 C (53.1 F)	35 of 100 (Notable)
Dillon 1 E	United States	Record low maximum temperature	14.4 C (57.9 F)	35 of 100 (Notable)
Halle	Germany	Record high minimum temperature	18.8 C (65.8 F)	34 of 100 (Routine)
Grainet-Rehberg	Germany	Record daily precipitation	41.6 mm (1.6 in)	34 of 100 (Routine)
Hameln	Germany	Record daily precipitation	38.5 mm (1.5 in)	34 of 100 (Routine)
Foxholm 7 N	United States	Record high maximum temperature	40.6 C (105.1 F)	34 of 100 (Routine)
Milesovka	Czech Republic	Record high maximum temperature	31.6 C (88.9 F)	33 of 100 (Routine)
Boquilla Numero Uno	Mexico	Record daily precipitation	38.4 mm (1.5 in)	33 of 100 (Routine)
Macuspana (Dge)	Mexico	Record daily precipitation	98.3 mm (3.9 in)	33 of 100 (Routine)
Osceola	United States	Record high maximum temperature	38.9 C (102.0 F)	33 of 100 (Routine)
Sunwu	China	Record daily precipitation	88.9 mm (3.5 in)	32 of 100 (Routine)
Abbeville	France	Record high minimum temperature	17.5 C (63.5 F)	32 of 100 (Routine)
Hamburg Fuhlsbuettel	Germany	Record high minimum temperature	17.7 C (63.9 F)	32 of 100 (Routine)
Schierke	Germany	Record high minimum temperature	13.0 C (55.4 F)	32 of 100 (Routine)
Santiago	Mexico	Record low maximum temperature	26.7 C (80.1 F)	32 of 100 (Routine)
Palos Altos	Mexico	Record low maximum temperature	27.2 C (81.0 F)	32 of 100 (Routine)
Zeerijp	Netherlands	Record daily precipitation	26.1 mm (1.0 in)	32 of 100 (Routine)
Mandan Exp STN	United States	Record high maximum temperature	40.0 C (104.0 F)	32 of 100 (Routine)
Piedras Blancas	Mexico	Record low minimum temperature	18.3 C (64.9 F)	31 of 100 (Routine)
Detroit Lakes 1 NNE	United States	Record high minimum temperature	22.2 C (72.0 F)	31 of 100 (Routine)
New Orleans Audubon	United States	Record daily precipitation	53.6 mm (2.1 in)	31 of 100 (Routine)
Milesovka	Czech Republic	Record high minimum temperature	17.3 C (63.1 F)	30 of 100 (Routine)

Counts by Type and Timescale

860 records

Records set or tied on 18 August 2003 by type: Highest daily maximum 265, Lowest daily maximum 80, Highest daily minimum 291, Lowest daily minimum 56, Heaviest daily rainfall 168.

Records on 18 August 2003 by type
Record type	Records
Highest daily maximum	265
Lowest daily maximum	80
Highest daily minimum	291
Lowest daily minimum	56
Heaviest daily rainfall	168
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 2003 by timescale: all-time 2, monthly 26, daily 832.

How Much Records Were Beaten By

638 broken records

Margins by which the 638 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 49.3. Ties are not counted.

Top 20 by Significance

18 August 2003

Top 20 records on 18 August 2003 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 2003	Konstantinovka, RU	daily rain	73.7 mm (2.9 in)	47.0 mm (1.9 in)	36 years	54 of 100 (Notable)
18 August 2003	Houma, US	daily rain	71.1 mm (2.8 in)	20.3 mm (0.8 in)	85 years	47 of 100 (Notable)
18 August 2003	Roseau, US	monthly high max	38.3 C (100.9 F)	1.6 C (2.9 F)	74 years	45 of 100 (Notable)
18 August 2003	Hatteras, US	daily rain	102.9 mm (4.1 in)	11.0 mm (0.4 in)	103 years	45 of 100 (Notable)
18 August 2003	Bjelasnica, BA	daily high min	16.0 C (60.8 F)	2.2 C (4.0 F)	98 years	44 of 100 (Notable)
18 August 2003	Las Bayas, MX	daily low min	-7.2 C (19.0 F)	10.0 C (18.0 F)	28 years	44 of 100 (Notable)
18 August 2003	Chiricahua Nm, US	daily high min	19.4 C (66.9 F)	1.6 C (2.9 F)	92 years	44 of 100 (Notable)
18 August 2003	Yerington, US	monthly high max	41.1 C (106.0 F)	0.5 C (0.9 F)	78 years	44 of 100 (Notable)
18 August 2003	Grafton, US	daily high min	24.4 C (75.9 F)	4.4 C (7.9 F)	82 years	44 of 100 (Notable)
18 August 2003	Tizi Ouzou, DZ	daily high min	25.0 C (77.0 F)	1.0 C (1.8 F)	100 years	43 of 100 (Notable)
18 August 2003	Kall-Sistig, DE	daily rain	31.5 mm (1.2 in)	17.5 mm (0.7 in)	40 years	43 of 100 (Notable)
18 August 2003	Pokrovskaja, RU	daily rain	29.0 mm (1.1 in)	16.0 mm (0.6 in)	42 years	43 of 100 (Notable)
18 August 2003	Lichtentanne, DE	daily high min	19.1 C (66.4 F)	0.6 C (1.1 F)	134 years	42 of 100 (Notable)
18 August 2003	Santo Domingo, MX	daily low min	8.9 C (48.0 F)	3.9 C (7.0 F)	49 years	42 of 100 (Notable)
18 August 2003	Brunswick, US	daily low min	17.2 C (63.0 F)	2.8 C (5.0 F)	44 years	42 of 100 (Notable)
18 August 2003	Red Lake Indian Agcy, US	daily high max	35.0 C (95.0 F)	2.8 C (5.0 F)	86 years	42 of 100 (Notable)
18 August 2003	Belzoni, US	daily high min	27.8 C (82.0 F)	3.4 C (6.1 F)	72 years	42 of 100 (Notable)
18 August 2003	Chemnitz, DE	daily high min	19.0 C (66.2 F)	0.4 C (0.7 F)	104 years	41 of 100 (Notable)
18 August 2003	Newport, US	daily high max	38.9 C (102.0 F)	1.1 C (2.0 F)	96 years	41 of 100 (Notable)
18 August 2003	Westhope, US	daily high min	21.1 C (70.0 F)	2.2 C (4.0 F)	86 years	41 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 2003

Records set or tied on this calendar date in each year from 1797 to 2003. 2003 had 860 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 2003-08-18: 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 2026-10-15 (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).

Histogram of margins by which records were beaten on 18 August 2003
Margin	Records
0 to 10	588
10 to 20	35
20 to 30	12
30 to 40	1
40 to 50	2