Weather Records on 18 May 2015

785 weather records were set or tied worldwide on 18 May 2015. Highest significance: Jamestown State Hosp, US.

Key Facts for 18 May 2015

On 18 May 2015, 785 weather records were set or tied at long-record stations worldwide.
391 were record highs and 135 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 13 monthly and 771 daily.
Jamestown State Hosp set a daily record precipitation of 63.5 mm (2.5 in) on 18 May 2015.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 440 records.

Record Map

785 stations

785 station records on 18 May 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Jamestown State Hosp	United States	Record daily precipitation	63.5 mm (2.5 in)	80 of 100 (Exceptional)
Red Lake Indian Agcy	United States	Record daily precipitation	68.6 mm (2.7 in)	73 of 100 (Major)
Courtenay 1 NW	United States	Record daily precipitation	52.1 mm (2.1 in)	68 of 100 (Major)
San Angelo	United States	Record daily precipitation	101.9 mm (4.0 in)	65 of 100 (Major)
Mc Henry 3W	United States	Record daily precipitation	34.5 mm (1.4 in)	56 of 100 (Notable)
Moffit 3 SE	United States	Record daily precipitation	33.0 mm (1.3 in)	56 of 100 (Notable)
Shilka	Russia	Record daily precipitation	25.9 mm (1.0 in)	55 of 100 (Notable)
Indus 3 W	United States	Record daily precipitation	43.9 mm (1.7 in)	55 of 100 (Notable)
Brenham	United States	Record daily precipitation	99.1 mm (3.9 in)	55 of 100 (Notable)
Sargents	United States	Record daily precipitation	28.7 mm (1.1 in)	54 of 100 (Notable)
Columbia Lock	United States	Record daily precipitation	180.3 mm (7.1 in)	54 of 100 (Notable)
Waskish 4NE	United States	Record daily precipitation	54.1 mm (2.1 in)	54 of 100 (Notable)
Elizabethton	United States	Record daily precipitation	43.4 mm (1.7 in)	54 of 100 (Notable)
Idaho Falls 16 SE	United States	Record daily precipitation	31.5 mm (1.2 in)	51 of 100 (Notable)
Bienville 3 NE	United States	Record daily precipitation	228.6 mm (9.0 in)	51 of 100 (Notable)
Cavalier 7NW	United States	Record daily precipitation	53.3 mm (2.1 in)	51 of 100 (Notable)
Hoosier Pass	United States	Record daily precipitation	33.0 mm (1.3 in)	51 of 100 (Notable)
Coffeeville	United States	Record daily precipitation	99.8 mm (3.9 in)	50 of 100 (Notable)
Rugby	United States	Record daily snowfall	5.1 cm (2.0 in)	50 of 100 (Notable)
Tihvin	Russia	Record daily precipitation	26.7 mm (1.1 in)	49 of 100 (Notable)
Big Falls	United States	Record daily precipitation	44.2 mm (1.7 in)	49 of 100 (Notable)
Detroit Lakes 1 NNE	United States	Record daily precipitation	44.5 mm (1.8 in)	49 of 100 (Notable)
Upham 3 N	United States	Record daily snowfall	10.2 cm (4.0 in)	49 of 100 (Notable)
Marbling	Australia	Record daily precipitation	51.6 mm (2.0 in)	48 of 100 (Notable)
Montpelier	United States	Record daily precipitation	75.2 mm (3.0 in)	48 of 100 (Notable)
Karragullen	Australia	Record daily precipitation	66.2 mm (2.6 in)	47 of 100 (Notable)
Langley	United States	Record daily precipitation	109.5 mm (4.3 in)	47 of 100 (Notable)
Mc Clusky	United States	Record daily snowfall	5.1 cm (2.0 in)	47 of 100 (Notable)
Keithville	United States	Record daily precipitation	114.3 mm (4.5 in)	46 of 100 (Notable)
Nye #2	United States	Record low maximum temperature	3.9 C (39.0 F)	45 of 100 (Notable)
Bottineau	United States	Record low maximum temperature	2.8 C (37.0 F)	45 of 100 (Notable)
Stoneville Exp STN	United States	Record daily precipitation	60.2 mm (2.4 in)	44 of 100 (Notable)
Lily Pond	United States	Record daily precipitation	30.5 mm (1.2 in)	44 of 100 (Notable)
Babaevo	Russia	Record daily precipitation	32.8 mm (1.3 in)	43 of 100 (Notable)
Meeker	United States	Record low minimum temperature	-4.4 C (24.1 F)	43 of 100 (Notable)
Elgin Water	United States	Record high minimum temperature	19.4 C (66.9 F)	43 of 100 (Notable)
Minot Exp STN	United States	Record low maximum temperature	5.0 C (41.0 F)	43 of 100 (Notable)
Renovo	United States	Record high minimum temperature	16.7 C (62.1 F)	43 of 100 (Notable)
Gosnells City	Australia	Record daily precipitation	56.0 mm (2.2 in)	42 of 100 (Notable)
Jandakot Aero	Australia	Record daily precipitation	51.2 mm (2.0 in)	42 of 100 (Notable)
Buxton	United Kingdom	Record daily precipitation	30.4 mm (1.2 in)	42 of 100 (Notable)
Logansport Cicott St	United States	Record high minimum temperature	19.4 C (66.9 F)	42 of 100 (Notable)
Hagerstown 1E	United States	Record high minimum temperature	20.0 C (68.0 F)	42 of 100 (Notable)
Adrian 2 NNE	United States	Record high minimum temperature	19.4 C (66.9 F)	42 of 100 (Notable)
Valentine	United States	Record low maximum temperature	8.3 C (46.9 F)	42 of 100 (Notable)
Valentine	United States	Record low minimum temperature	-2.2 C (28.0 F)	42 of 100 (Notable)
Carrington 4 N	United States	Record daily precipitation	48.3 mm (1.9 in)	42 of 100 (Notable)
Washington Sp	United States	Record daily precipitation	96.5 mm (3.8 in)	42 of 100 (Notable)
Eagle	United States	Record high maximum temperature	29.4 C (84.9 F)	42 of 100 (Notable)
Martinsburg E W Virginia Rgnl	United States	Record high minimum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Cedartown	United States	Record high minimum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Laurel 3 W	United States	Record daily precipitation	49.8 mm (2.0 in)	41 of 100 (Notable)
Charlevoix	United States	Record high maximum temperature	31.1 C (88.0 F)	41 of 100 (Notable)
Charlotte	United States	Record high minimum temperature	18.9 C (66.0 F)	41 of 100 (Notable)
Adel	United States	Record low maximum temperature	1.7 C (35.1 F)	41 of 100 (Notable)
Medicine Lake 3 SE	United States	Record low minimum temperature	-4.4 C (24.1 F)	41 of 100 (Notable)
Savage	United States	Record low minimum temperature	-1.7 C (28.9 F)	41 of 100 (Notable)
Sidney	United States	Record low minimum temperature	-2.8 C (27.0 F)	41 of 100 (Notable)
Flemington 5 NNW	United States	Record high minimum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Willow City	United States	Record low maximum temperature	6.7 C (44.1 F)	41 of 100 (Notable)

Counts by Type and Timescale

785 records

Records set or tied on 18 May 2015 by type: Highest daily maximum 86, Lowest daily maximum 79, Highest daily minimum 305, Lowest daily minimum 56, Heaviest daily rainfall 229, Heaviest daily snowfall 19, Deepest snow cover 11.

Records on 18 May 2015 by type
Record type	Records
Highest daily maximum	86
Lowest daily maximum	79
Highest daily minimum	305
Lowest daily minimum	56
Heaviest daily rainfall	229
Heaviest daily snowfall	19
Deepest snow cover	11

Records on 18 May 2015 by timescale: all-time 1, monthly 13, daily 771.

How Much Records Were Beaten By

633 broken records

Margins by which the 633 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 350.0. Ties are not counted.

Top 20 by Significance

18 May 2015

Top 20 records on 18 May 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 2015	Jamestown State Hosp, US	daily rain	63.5 mm (2.5 in)	44.7 mm (1.8 in)	112 years	80 of 100 (Exceptional)
18 May 2015	Red Lake Indian Agcy, US	daily rain	68.6 mm (2.7 in)	34.3 mm (1.4 in)	100 years	73 of 100 (Major)
18 May 2015	Courtenay 1 NW, US	daily rain	52.1 mm (2.1 in)	31.5 mm (1.2 in)	70 years	68 of 100 (Major)
18 May 2015	San Angelo, US	monthly rain	101.9 mm (4.0 in)	20.6 mm (0.8 in)	102 years	65 of 100 (Major)
18 May 2015	Mc Henry 3W, US	daily rain	34.5 mm (1.4 in)	15.4 mm (0.6 in)	96 years	56 of 100 (Notable)
18 May 2015	Moffit 3 SE, US	daily rain	33.0 mm (1.3 in)	26.6 mm (1.0 in)	69 years	56 of 100 (Notable)
18 May 2015	Shilka, RU	daily rain	25.9 mm (1.0 in)	20.6 mm (0.8 in)	25 years	55 of 100 (Notable)
18 May 2015	Indus 3 W, US	daily rain	43.9 mm (1.7 in)	25.9 mm (1.0 in)	56 years	55 of 100 (Notable)
18 May 2015	Brenham, US	daily rain	99.1 mm (3.9 in)	46.0 mm (1.8 in)	76 years	55 of 100 (Notable)
18 May 2015	Sargents, US	daily rain	28.7 mm (1.1 in)	19.3 mm (0.8 in)	14 years	54 of 100 (Notable)
18 May 2015	Columbia Lock, US	monthly rain	180.3 mm (7.1 in)	58.4 mm (2.3 in)	37 years	54 of 100 (Notable)
18 May 2015	Waskish 4NE, US	daily rain	54.1 mm (2.1 in)	38.9 mm (1.5 in)	18 years	54 of 100 (Notable)
18 May 2015	Elizabethton, US	daily rain	43.4 mm (1.7 in)	15.5 mm (0.6 in)	113 years	54 of 100 (Notable)
18 May 2015	Idaho Falls 16 SE, US	daily rain	31.5 mm (1.2 in)	16.8 mm (0.7 in)	36 years	51 of 100 (Notable)
18 May 2015	Bienville 3 NE, US	daily rain	228.6 mm (9.0 in)	178.6 mm (7.0 in)	25 years	51 of 100 (Notable)
18 May 2015	Cavalier 7NW, US	daily rain	53.3 mm (2.1 in)	29.9 mm (1.2 in)	32 years	51 of 100 (Notable)
18 May 2015	Hoosier Pass, US	daily rain	33.0 mm (1.3 in)	25.4 mm (1.0 in)	26 years	51 of 100 (Notable)
18 May 2015	Coffeeville, US	daily rain	99.8 mm (3.9 in)	47.2 mm (1.9 in)	48 years	50 of 100 (Notable)
18 May 2015	Rugby, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	110 years	50 of 100 (Notable)
18 May 2015	Tihvin, RU	daily rain	26.7 mm (1.1 in)	12.9 mm (0.5 in)	49 years	49 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 2015

Records set or tied on this calendar date in each year from 1796 to 2015. 2015 had 785 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 2015-05-18: 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 50	618
50 to 100	10
100 to 150	3
150 to 200	1
200 to 250	0
250 to 300	0
300 to 350	1