Weather Records on 18 May 2003

1,270 weather records were set or tied worldwide on 18 May 2003. Highest significance: Mt Wx, US.

Key Facts for 18 May 2003

On 18 May 2003, 1,270 weather records were set or tied at long-record stations worldwide.
554 were record highs and 413 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 21 monthly and 1,245 daily.
Mt Wx set a daily record precipitation of 77.5 mm (3.1 in) on 18 May 2003.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 437 records.

Record Map

1,270 stations

1,270 station records on 18 May 2003 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 2003: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mt Wx	United States	Record daily precipitation	77.5 mm (3.1 in)	57 of 100 (Notable)
Ft Payne	United States	Record daily precipitation	110.5 mm (4.4 in)	55 of 100 (Notable)
Shelby 2 NW	United States	Record low maximum temperature	12.8 C (55.0 F)	55 of 100 (Notable)
Valier	United States	Record daily snowfall	7.6 cm (3.0 in)	52 of 100 (Notable)
Eden (Caravan Park)	Australia	Record daily precipitation	93.5 mm (3.7 in)	51 of 100 (Notable)
Bay Minette	United States	Record daily precipitation	194.6 mm (7.7 in)	51 of 100 (Notable)
Milford 2 SE	United States	Record low maximum temperature	11.1 C (52.0 F)	51 of 100 (Notable)
Mobile	United States	Record daily precipitation	160.0 mm (6.3 in)	50 of 100 (Notable)
Rome R B Russell AP	United States	Record daily precipitation	68.6 mm (2.7 in)	50 of 100 (Notable)
Pasto/Antonio Narin	Colombia	Record daily precipitation	110.0 mm (4.3 in)	49 of 100 (Notable)
Warsaw 2 NW	United States	Record low maximum temperature	12.8 C (55.0 F)	49 of 100 (Notable)
Beaufort Wwtp	United States	Record daily precipitation	48.8 mm (1.9 in)	48 of 100 (Notable)
Ashland	United States	Record low maximum temperature	11.7 C (53.1 F)	48 of 100 (Notable)
Savannah Intl AP	United States	Record daily precipitation	75.7 mm (3.0 in)	47 of 100 (Notable)
Dover	United States	Record low maximum temperature	11.1 C (52.0 F)	46 of 100 (Notable)
Laurel 3 W	United States	Record low maximum temperature	12.8 C (55.0 F)	46 of 100 (Notable)
Conrad	United States	Record daily snowfall	5.1 cm (2.0 in)	46 of 100 (Notable)
Fayette	United States	Record daily precipitation	63.2 mm (2.5 in)	45 of 100 (Notable)
Solomons	United States	Record low maximum temperature	15.6 C (60.1 F)	45 of 100 (Notable)
Anaconda	United States	Record low minimum temperature	-4.4 C (24.1 F)	45 of 100 (Notable)
Asheboro 2 W	United States	Record low maximum temperature	13.3 C (55.9 F)	45 of 100 (Notable)
Marlinton	United States	Record daily precipitation	29.5 mm (1.2 in)	45 of 100 (Notable)
San Jose de Raices	Mexico	Record high minimum temperature	21.7 C (71.1 F)	44 of 100 (Notable)
Samburg Wr	United States	Record daily precipitation	52.8 mm (2.1 in)	44 of 100 (Notable)
Winston Salem Reynolds AP	United States	Record low maximum temperature	12.8 C (55.0 F)	44 of 100 (Notable)
Moina	Australia	Record daily precipitation	63.2 mm (2.5 in)	43 of 100 (Notable)
Saguache	United States	Record high minimum temperature	7.2 C (45.0 F)	43 of 100 (Notable)
Deland 1 SSE	United States	Record high minimum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Moccasin Exp STN	United States	Record daily snowfall	17.8 cm (7.0 in)	43 of 100 (Notable)
High Pt	United States	Record low maximum temperature	13.9 C (57.0 F)	43 of 100 (Notable)
Boulia Airport	Australia	Record high maximum temperature	33.2 C (91.8 F)	42 of 100 (Notable)
Augusta	United States	Record low minimum temperature	-5.0 C (23.0 F)	42 of 100 (Notable)
The Dalles	United States	Record low minimum temperature	1.1 C (34.0 F)	42 of 100 (Notable)
Summerville 4W	United States	Record daily precipitation	33.0 mm (1.3 in)	42 of 100 (Notable)
Sonora	United States	Record high maximum temperature	37.8 C (100.0 F)	42 of 100 (Notable)
Pensacola Rgnl AP	United States	Record daily precipitation	89.2 mm (3.5 in)	42 of 100 (Notable)
Taylorsville	United States	Record daily precipitation	61.2 mm (2.4 in)	41 of 100 (Notable)
Grangeville	United States	Record low maximum temperature	4.4 C (39.9 F)	41 of 100 (Notable)
Morganton	United States	Record low maximum temperature	13.9 C (57.0 F)	41 of 100 (Notable)
Forest Grove	United States	Record low minimum temperature	-1.1 C (30.0 F)	41 of 100 (Notable)
Martinsville Fltr Plt	United States	Record low maximum temperature	11.7 C (53.1 F)	41 of 100 (Notable)
Lewistown AP	United States	Record low maximum temperature	1.7 C (35.1 F)	41 of 100 (Notable)
Buckatunna 1 NE	United States	Record daily precipitation	53.3 mm (2.1 in)	40 of 100 (Notable)
Laguna	United States	Record high maximum temperature	33.9 C (93.0 F)	40 of 100 (Notable)
Corvallis State UNIV	United States	Record low minimum temperature	0.0 C (32.0 F)	40 of 100 (Notable)
Clearwater	United States	Record low minimum temperature	-1.1 C (30.0 F)	40 of 100 (Notable)
Roseau	United States	Record daily precipitation	33.8 mm (1.3 in)	39 of 100 (Notable)
Booneville	United States	Record daily precipitation	51.3 mm (2.0 in)	39 of 100 (Notable)
Pulaski 2 E	United States	Record low maximum temperature	11.7 C (53.1 F)	39 of 100 (Notable)
Talladega	United States	Record daily precipitation	43.4 mm (1.7 in)	38 of 100 (Notable)
Dumas	United States	Record high minimum temperature	25.6 C (78.1 F)	38 of 100 (Notable)
Meeker	United States	Record high minimum temperature	9.4 C (48.9 F)	38 of 100 (Notable)
Chickamauga 2 SW	United States	Record daily precipitation	69.9 mm (2.8 in)	38 of 100 (Notable)
Norcross	United States	Record daily precipitation	58.4 mm (2.3 in)	38 of 100 (Notable)
Hagerstown 1E	United States	Record low maximum temperature	13.3 C (55.9 F)	38 of 100 (Notable)
Santuck	United States	Record low maximum temperature	19.4 C (66.9 F)	38 of 100 (Notable)
Gail	United States	Record high maximum temperature	40.0 C (104.0 F)	38 of 100 (Notable)
Newport 2 NNW	United States	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Elma	United States	Record low minimum temperature	-2.8 C (27.0 F)	38 of 100 (Notable)
Gainesville Lock	United States	Record daily precipitation	60.5 mm (2.4 in)	37 of 100 (Notable)

Counts by Type and Timescale

1,270 records

Records set or tied on 18 May 2003 by type: Highest daily maximum 310, Lowest daily maximum 256, Highest daily minimum 244, Lowest daily minimum 157, Heaviest daily rainfall 265, Heaviest daily snowfall 26, Deepest snow cover 12.

Records on 18 May 2003 by type
Record type	Records
Highest daily maximum	310
Lowest daily maximum	256
Highest daily minimum	244
Lowest daily minimum	157
Heaviest daily rainfall	265
Heaviest daily snowfall	26
Deepest snow cover	12

Records on 18 May 2003 by timescale: all-time 4, monthly 21, daily 1,245.

How Much Records Were Beaten By

951 broken records

Margins by which the 951 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 178.0. Ties are not counted.

Top 20 by Significance

18 May 2003

Top 20 records on 18 May 2003 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 2003	Mt Wx, US	daily rain	77.5 mm (3.1 in)	29.2 mm (1.1 in)	80 years	57 of 100 (Notable)
18 May 2003	Ft Payne, US	daily rain	110.5 mm (4.4 in)	57.2 mm (2.3 in)	33 years	55 of 100 (Notable)
18 May 2003	Shelby 2 NW, US	daily low max	12.8 C (55.0 F)	6.6 C (11.9 F)	107 years	55 of 100 (Notable)
18 May 2003	Valier, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	90 years	52 of 100 (Notable)
18 May 2003	Eden (Caravan Park), AU	daily rain	93.5 mm (3.7 in)	29.5 mm (1.2 in)	77 years	51 of 100 (Notable)
18 May 2003	Bay Minette, US	monthly rain	194.6 mm (7.7 in)	43.2 mm (1.7 in)	46 years	51 of 100 (Notable)
18 May 2003	Milford 2 SE, US	daily low max	11.1 C (52.0 F)	5.6 C (10.1 F)	103 years	51 of 100 (Notable)
18 May 2003	Mobile, US	daily rain	160.0 mm (6.3 in)	116.6 mm (4.6 in)	16 years	50 of 100 (Notable)
18 May 2003	Rome R B Russell AP, US	daily rain	68.6 mm (2.7 in)	49.8 mm (2.0 in)	36 years	50 of 100 (Notable)
18 May 2003	Pasto/Antonio Narin, CO	all-time rain	110.0 mm (4.3 in)	15.0 mm (0.6 in)	40 years	49 of 100 (Notable)
18 May 2003	Warsaw 2 NW, US	daily low max	12.8 C (55.0 F)	4.4 C (7.9 F)	107 years	49 of 100 (Notable)
18 May 2003	Beaufort Wwtp, US	daily rain	48.8 mm (1.9 in)	13.0 mm (0.5 in)	108 years	48 of 100 (Notable)
18 May 2003	Ashland, US	daily low max	11.7 C (53.1 F)	3.9 C (7.0 F)	107 years	48 of 100 (Notable)
18 May 2003	Savannah Intl AP, US	daily rain	75.7 mm (3.0 in)	48.0 mm (1.9 in)	45 years	47 of 100 (Notable)
18 May 2003	Dover, US	daily low max	11.1 C (52.0 F)	3.3 C (5.9 F)	107 years	46 of 100 (Notable)
18 May 2003	Laurel 3 W, US	daily low max	12.8 C (55.0 F)	3.3 C (5.9 F)	107 years	46 of 100 (Notable)
18 May 2003	Conrad, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	92 years	46 of 100 (Notable)
18 May 2003	Fayette, US	daily rain	63.2 mm (2.5 in)	21.3 mm (0.8 in)	73 years	45 of 100 (Notable)
18 May 2003	Solomons, US	daily low max	15.6 C (60.1 F)	2.2 C (4.0 F)	107 years	45 of 100 (Notable)
18 May 2003	Anaconda, US	daily low min	-4.4 C (24.1 F)	2.2 C (4.0 F)	97 years	45 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

1796 to 2003

Records set or tied on this calendar date in each year from 1796 to 2003. 2003 had 1,270 records.

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

Records on 05-18 in each year
Year	Records
1796	1
1798	1
1802	2
1832	1
1833	1
1845	1
1847	1
1848	1
1855	1
1859	1
1861	2
1863	3
1864	1
1866	2
1868	2
1869	1
1870	1
1871	2
1872	1
1874	2
1877	4
1878	1
1879	1
1881	1
1883	2
1884	2
1885	1
1887	1
1888	4
1889	2
1891	1
1893	2
1894	4
1895	5
1896	2
1897	2
1898	1
1899	1
1900	13
1901	6
1902	9
1903	7
1904	11
1905	2
1906	24
1907	18
1908	5
1909	12
1910	50
1911	64
1912	5
1913	11
1914	45
1915	55
1916	74
1917	30
1918	42
1919	30
1920	26
1921	41
1922	33
1923	61
1924	92
1925	220
1926	133
1927	180
1928	160
1929	193
1930	475
1931	191
1932	460
1933	380
1934	390
1935	400
1936	282
1937	348
1938	382
1939	169
1940	315
1941	334
1942	421
1943	744
1944	496
1945	706
1946	651
1947	231
1948	426
1949	597
1950	473
1951	279
1952	493
1953	393
1954	498
1955	848
1956	795
1957	595
1958	334
1959	435
1960	404
1961	187
1962	1,199
1963	477
1964	329
1965	345
1966	438
1967	410
1968	817
1969	865
1970	703
1971	666
1972	499
1973	1,233
1974	1,097
1975	383
1976	733
1977	1,126
1978	1,090
1979	399
1980	614
1981	1,218
1982	452
1983	1,093
1984	717
1985	498
1986	1,131
1987	823
1988	1,154
1989	721
1990	753
1991	1,218
1992	921
1993	707
1994	1,015
1995	1,849
1996	1,767
1997	1,115
1998	1,060
1999	584
2000	922
2001	898
2002	1,833
2003	1,270
2004	847
2005	630
2006	1,493
2007	1,133
2008	999
2009	1,368
2010	894
2011	1,406
2012	523
2013	816
2014	609
2015	785
2016	597
2017	1,855
2018	557
2019	810
2020	706
2021	418
2022	711
2023	554
2024	551
2025	619
2026	1,131

Download the Data

Data for records on 2003-05-18: 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 25	895
25 to 50	39
50 to 75	10
75 to 100	4
100 to 125	1
125 to 150	1
150 to 175	0
175 to 200	1