Weather Records on 18 May 2011

1,406 weather records were set or tied worldwide on 18 May 2011. Highest significance: Volta Ph, US.

Key Facts for 18 May 2011

On 18 May 2011, 1,406 weather records were set or tied at long-record stations worldwide.
197 were record highs and 802 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 37 monthly and 1,366 daily.
Volta Ph set a daily record precipitation of 63.2 mm (2.5 in) on 18 May 2011.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 437 records.

Record Map

1,406 stations

1,406 station records on 18 May 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Volta Ph	United States	Record daily precipitation	63.2 mm (2.5 in)	70 of 100 (Major)
Moorefield 1 SSE	United States	Record daily precipitation	64.8 mm (2.6 in)	67 of 100 (Major)
Bridgeport	United States	Record daily precipitation	50.8 mm (2.0 in)	65 of 100 (Major)
Kalgoorlie-Boulder Airport	Australia	Record daily precipitation	27.4 mm (1.1 in)	63 of 100 (Major)
Parsons 3 SE	United States	Record daily precipitation	73.2 mm (2.9 in)	63 of 100 (Major)
Bowman Dam	United States	Record daily snowfall	15.2 cm (6.0 in)	59 of 100 (Notable)
Dale Enterprise	United States	Record daily precipitation	45.7 mm (1.8 in)	58 of 100 (Notable)
Romney 1 SW	United States	Record daily precipitation	66.0 mm (2.6 in)	58 of 100 (Notable)
Hines Hill	Australia	Record daily precipitation	51.6 mm (2.0 in)	54 of 100 (Notable)
Mt Sterling	United States	Record low maximum temperature	8.9 C (48.0 F)	52 of 100 (Notable)
Cedar City AP	United States	Record daily precipitation	30.0 mm (1.2 in)	52 of 100 (Notable)
Williams	United States	Record daily snowfall	7.6 cm (3.0 in)	51 of 100 (Notable)
Cuthbert	United States	Record low minimum temperature	5.6 C (42.1 F)	51 of 100 (Notable)
Waynesville 1 E	United States	Record low maximum temperature	8.3 C (46.9 F)	51 of 100 (Notable)
Conway	United States	Record low maximum temperature	17.8 C (64.0 F)	50 of 100 (Notable)
Campina Grande	Brazil	Record daily precipitation	55.1 mm (2.2 in)	49 of 100 (Notable)
Sewanee	United States	Record low maximum temperature	11.7 C (53.1 F)	49 of 100 (Notable)
Laurens	United States	Record low maximum temperature	14.4 C (57.9 F)	48 of 100 (Notable)
Purcellville	United States	Record daily precipitation	56.4 mm (2.2 in)	48 of 100 (Notable)
Mormon Mountain	United States	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Thomasville 7 NE	United States	Record low minimum temperature	7.2 C (45.0 F)	47 of 100 (Notable)
Marion	United States	Record low maximum temperature	12.8 C (55.0 F)	47 of 100 (Notable)
Tryon	United States	Record low maximum temperature	11.1 C (52.0 F)	47 of 100 (Notable)
Portsmouth-Sciotoville	United States	Record low maximum temperature	11.7 C (53.1 F)	47 of 100 (Notable)
South Pass City	United States	Record daily snowfall	20.3 cm (8.0 in)	47 of 100 (Notable)
Silverton	United States	Record daily snowfall	17.8 cm (7.0 in)	46 of 100 (Notable)
Circleville	United States	Record low maximum temperature	10.6 C (51.1 F)	46 of 100 (Notable)
Aneityum	Vanuatu	Record daily precipitation	95.0 mm (3.7 in)	45 of 100 (Notable)
Jackson 3 NW	United States	Record low maximum temperature	10.6 C (51.1 F)	45 of 100 (Notable)
Little Mtn	United States	Record low maximum temperature	16.7 C (62.1 F)	45 of 100 (Notable)
Anniston Metro AP	United States	Record low minimum temperature	4.4 C (39.9 F)	45 of 100 (Notable)
Combolcha	Ethiopia	Record daily precipitation	50.0 mm (2.0 in)	44 of 100 (Notable)
Noumea Nf	New Caledonia [France]	Record daily precipitation	40.9 mm (1.6 in)	44 of 100 (Notable)
Guayama 1SW	Puerto Rico [United States]	Record low maximum temperature	27.2 C (81.0 F)	44 of 100 (Notable)
Greensburg	United States	Record low maximum temperature	13.3 C (55.9 F)	44 of 100 (Notable)
Louisville	United States	Record low minimum temperature	4.4 C (39.9 F)	44 of 100 (Notable)
N Fk Rs	United States	Record low maximum temperature	8.9 C (48.0 F)	43 of 100 (Notable)
Maysville Wwtp	United States	Record low maximum temperature	11.1 C (52.0 F)	43 of 100 (Notable)
Franklin 3 NW	United States	Record low minimum temperature	9.4 C (48.9 F)	43 of 100 (Notable)
Hetch Hetchy	United States	Record daily precipitation	25.7 mm (1.0 in)	42 of 100 (Notable)
Covington	United States	Record low maximum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Brevard	United States	Record low maximum temperature	11.1 C (52.0 F)	42 of 100 (Notable)
Waverly	United States	Record low maximum temperature	11.7 C (53.1 F)	42 of 100 (Notable)
Newberry	United States	Record low maximum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Savannah 6 SW	United States	Record low minimum temperature	5.0 C (41.0 F)	42 of 100 (Notable)
Hobbs Park	United States	Record daily precipitation	45.7 mm (1.8 in)	42 of 100 (Notable)
Bay Minette	United States	Record low minimum temperature	8.3 C (46.9 F)	41 of 100 (Notable)
Jonesboro 3 SSE	United States	Record low minimum temperature	5.6 C (42.1 F)	41 of 100 (Notable)
Indio Fire STN	United States	Record low maximum temperature	23.3 C (73.9 F)	41 of 100 (Notable)
Louisville 1 E	United States	Record low maximum temperature	21.7 C (71.1 F)	41 of 100 (Notable)
Monticello	United States	Record low maximum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Tifton	United States	Record low minimum temperature	6.7 C (44.1 F)	41 of 100 (Notable)
Jeanerette 5 NW	United States	Record low minimum temperature	10.0 C (50.0 F)	41 of 100 (Notable)
Charleston	United States	Record low minimum temperature	5.0 C (41.0 F)	41 of 100 (Notable)
Clarksdale	United States	Record low minimum temperature	6.1 C (43.0 F)	41 of 100 (Notable)
Urbana Wrf	United States	Record low maximum temperature	10.0 C (50.0 F)	41 of 100 (Notable)
Hot Springs	United States	Record daily precipitation	56.4 mm (2.2 in)	41 of 100 (Notable)
Rosalia	United States	Record low minimum temperature	-1.7 C (28.9 F)	41 of 100 (Notable)
Camilla 3SE	United States	Record low minimum temperature	6.7 C (44.1 F)	40 of 100 (Notable)
Lawrence	United States	Record low maximum temperature	10.6 C (51.1 F)	40 of 100 (Notable)

Counts by Type and Timescale

1,406 records

Records set or tied on 18 May 2011 by type: Highest daily maximum 119, Lowest daily maximum 526, Highest daily minimum 78, Lowest daily minimum 276, Heaviest daily rainfall 379, Heaviest daily snowfall 16, Deepest snow cover 12.

Records on 18 May 2011 by type
Record type	Records
Highest daily maximum	119
Lowest daily maximum	526
Highest daily minimum	78
Lowest daily minimum	276
Heaviest daily rainfall	379
Heaviest daily snowfall	16
Deepest snow cover	12

Records on 18 May 2011 by timescale: all-time 3, monthly 37, daily 1,366.

How Much Records Were Beaten By

1,114 broken records

Margins by which the 1,114 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 153.0. Ties are not counted.

Top 20 by Significance

18 May 2011

Top 20 records on 18 May 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 2011	Volta Ph, US	daily rain	63.2 mm (2.5 in)	39.8 mm (1.6 in)	73 years	70 of 100 (Major)
18 May 2011	Moorefield 1 SSE, US	daily rain	64.8 mm (2.6 in)	26.7 mm (1.1 in)	106 years	67 of 100 (Major)
18 May 2011	Bridgeport, US	daily rain	50.8 mm (2.0 in)	30.0 mm (1.2 in)	76 years	65 of 100 (Major)
18 May 2011	Kalgoorlie-Boulder Airport, AU	daily rain	27.4 mm (1.1 in)	21.6 mm (0.9 in)	66 years	63 of 100 (Major)
18 May 2011	Parsons 3 SE, US	daily rain	73.2 mm (2.9 in)	29.3 mm (1.2 in)	106 years	63 of 100 (Major)
18 May 2011	Bowman Dam, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	111 years	59 of 100 (Notable)
18 May 2011	Dale Enterprise, US	daily rain	45.7 mm (1.8 in)	17.3 mm (0.7 in)	106 years	58 of 100 (Notable)
18 May 2011	Romney 1 SW, US	daily rain	66.0 mm (2.6 in)	17.2 mm (0.7 in)	111 years	58 of 100 (Notable)
18 May 2011	Hines Hill, AU	monthly rain	51.6 mm (2.0 in)	11.0 mm (0.4 in)	69 years	54 of 100 (Notable)
18 May 2011	Mt Sterling, US	daily low max	8.9 C (48.0 F)	6.1 C (11.0 F)	106 years	52 of 100 (Notable)
18 May 2011	Cedar City AP, US	daily rain	30.0 mm (1.2 in)	25.2 mm (1.0 in)	22 years	52 of 100 (Notable)
18 May 2011	Williams, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	113 years	51 of 100 (Notable)
18 May 2011	Cuthbert, US	monthly low min	5.6 C (42.1 F)	0.5 C (0.9 F)	102 years	51 of 100 (Notable)
18 May 2011	Waynesville 1 E, US	daily low max	8.3 C (46.9 F)	4.5 C (8.1 F)	100 years	51 of 100 (Notable)
18 May 2011	Conway, US	daily low max	17.8 C (64.0 F)	4.4 C (7.9 F)	96 years	50 of 100 (Notable)
18 May 2011	Campina Grande, BR	daily rain	55.1 mm (2.2 in)	11.1 mm (0.4 in)	98 years	49 of 100 (Notable)
18 May 2011	Sewanee, US	daily low max	11.7 C (53.1 F)	3.9 C (7.0 F)	100 years	49 of 100 (Notable)
18 May 2011	Laurens, US	daily low max	14.4 C (57.9 F)	4.5 C (8.1 F)	90 years	48 of 100 (Notable)
18 May 2011	Purcellville, US	daily rain	56.4 mm (2.2 in)	15.3 mm (0.6 in)	88 years	48 of 100 (Notable)
18 May 2011	Mormon Mountain, US	monthly rain	33.0 mm (1.3 in)	10.1 mm (0.4 in)	20 years	48 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 2011

Records set or tied on this calendar date in each year from 1796 to 2011. 2011 had 1,406 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 2011-05-18: 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 2026-10-15 (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).

Margin	Records
0 to 20	1,066
20 to 40	34
40 to 60	6
60 to 80	4
80 to 100	0
100 to 120	1
120 to 140	1
140 to 160	2