Weather Records on 15 May 2018

1,074 weather records were set or tied worldwide on 15 May 2018. Highest significance: Madison, US.

Key Facts for 15 May 2018

On 15 May 2018, 1,074 weather records were set or tied at long-record stations worldwide.
886 were record highs and 47 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 24 monthly and 1,049 daily.
Madison set a daily record precipitation of 65.8 mm (2.6 in) on 15 May 2018.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 427 records.

Record Map

1,074 stations

1,074 station records on 15 May 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Madison	United States	Record daily precipitation	65.8 mm (2.6 in)	68 of 100 (Major)
Iola 1 W	United States	Record daily precipitation	84.6 mm (3.3 in)	67 of 100 (Major)
Luray 5 E	United States	Record daily precipitation	73.7 mm (2.9 in)	65 of 100 (Major)
Clarksburg 1	United States	Record daily precipitation	63.5 mm (2.5 in)	65 of 100 (Major)
Newkirk 5NE	United States	Record daily precipitation	74.2 mm (2.9 in)	63 of 100 (Major)
Le Roy	United States	Record daily precipitation	95.3 mm (3.8 in)	59 of 100 (Notable)
Maraza	Azerbaijan	Record daily precipitation	99.3 mm (3.9 in)	57 of 100 (Notable)
Goychay	Azerbaijan	Record daily precipitation	99.1 mm (3.9 in)	56 of 100 (Notable)
Arkansas City	United States	Record daily precipitation	46.7 mm (1.8 in)	55 of 100 (Notable)
Chitradurga	India	Record daily precipitation	54.4 mm (2.1 in)	51 of 100 (Notable)
Virgil	United States	Record daily precipitation	88.9 mm (3.5 in)	51 of 100 (Notable)
New Orleans Audubon	United States	Record high maximum temperature	36.1 C (97.0 F)	50 of 100 (Notable)
Phan Thiet	Vietnam	Record low minimum temperature	20.7 C (69.3 F)	50 of 100 (Notable)
Fall Rvr Lake	United States	Record daily precipitation	66.3 mm (2.6 in)	49 of 100 (Notable)
Darby	United States	Record high minimum temperature	16.7 C (62.1 F)	48 of 100 (Notable)
Jefferson 2 E	United States	Record high maximum temperature	30.6 C (87.1 F)	46 of 100 (Notable)
Tabora Airport	Tanzania	Record daily precipitation	99.1 mm (3.9 in)	45 of 100 (Notable)
Robinson	United States	Record high maximum temperature	34.4 C (93.9 F)	45 of 100 (Notable)
Moran	United States	Record daily precipitation	42.4 mm (1.7 in)	45 of 100 (Notable)
Keshan	China	Record daily precipitation	33.3 mm (1.3 in)	44 of 100 (Notable)
Louisville	United States	Record high maximum temperature	34.4 C (93.9 F)	44 of 100 (Notable)
State UNIV	United States	Record high maximum temperature	35.6 C (96.1 F)	44 of 100 (Notable)
Halmstad	Sweden	Record high maximum temperature	27.7 C (81.9 F)	43 of 100 (Notable)
Deland 1 SSE	United States	Record low maximum temperature	23.3 C (73.9 F)	43 of 100 (Notable)
Yates Ctr	United States	Record daily precipitation	64.8 mm (2.6 in)	43 of 100 (Notable)
Hardy	United States	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Subiaco	United States	Record high maximum temperature	33.9 C (93.0 F)	42 of 100 (Notable)
Robinson	United States	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Rosalia 1NW	United States	Record daily precipitation	69.3 mm (2.7 in)	42 of 100 (Notable)
Henderson 8 SSW	United States	Record high maximum temperature	33.9 C (93.0 F)	42 of 100 (Notable)
Warrensburg 4NW	United States	Record daily precipitation	88.9 mm (3.5 in)	42 of 100 (Notable)
Urbana Wrf	United States	Record high minimum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Clarksville Wwtp	United States	Record high minimum temperature	20.0 C (68.0 F)	42 of 100 (Notable)
Milan Exp STN	United States	Record high maximum temperature	33.9 C (93.0 F)	42 of 100 (Notable)
Benton	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Conway	United States	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Elberton 2 N	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Olney 2S	United States	Record high maximum temperature	32.8 C (91.0 F)	41 of 100 (Notable)
University	United States	Record high maximum temperature	34.4 C (93.9 F)	41 of 100 (Notable)
Jackson	United States	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Cape May 2 NW	United States	Record high minimum temperature	17.2 C (63.0 F)	41 of 100 (Notable)
Henderson 2 NNW	United States	Record high minimum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Tarboro 1 S	United States	Record high maximum temperature	35.6 C (96.1 F)	41 of 100 (Notable)
Enid	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Lewisburg Exp STN	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Savannah 6 SW	United States	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Lexington	United States	Record high maximum temperature	32.8 C (91.0 F)	41 of 100 (Notable)
Rocky Mt	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Three Creeks Meadow	United States	Record daily precipitation	27.9 mm (1.1 in)	41 of 100 (Notable)
Karlstad	Sweden	Record high maximum temperature	26.6 C (79.9 F)	40 of 100 (Notable)
Gyzylarbat	Turkmenistan	Record daily precipitation	25.9 mm (1.0 in)	40 of 100 (Notable)
White Hall 1 E	United States	Record high maximum temperature	32.2 C (90.0 F)	40 of 100 (Notable)
W Lafayette 6 NW	United States	Record high maximum temperature	32.2 C (90.0 F)	40 of 100 (Notable)
Longton	United States	Record daily precipitation	69.1 mm (2.7 in)	39 of 100 (Notable)
S Haven	United States	Record daily precipitation	25.7 mm (1.0 in)	39 of 100 (Notable)
Cascade Locks	United States	Record high maximum temperature	32.2 C (90.0 F)	39 of 100 (Notable)
Port Alsworth	United States	Record daily snowfall	8.9 cm (3.5 in)	39 of 100 (Notable)
Kolka	Latvia	Record high maximum temperature	26.2 C (79.2 F)	38 of 100 (Notable)
Greenfield	United States	Record high minimum temperature	20.6 C (69.1 F)	38 of 100 (Notable)
Bloomingdale	United States	Record daily precipitation	37.8 mm (1.5 in)	38 of 100 (Notable)

Counts by Type and Timescale

1,074 records

Records set or tied on 15 May 2018 by type: Highest daily maximum 548, Lowest daily maximum 25, Highest daily minimum 338, Lowest daily minimum 22, Heaviest daily rainfall 140, Heaviest daily snowfall 1.

Records on 15 May 2018 by type
Record type	Records
Highest daily maximum	548
Lowest daily maximum	25
Highest daily minimum	338
Lowest daily minimum	22
Heaviest daily rainfall	140
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 15 May 2018 by timescale: all-time 1, monthly 24, daily 1,049.

How Much Records Were Beaten By

832 broken records

Margins by which the 832 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 89.0. Ties are not counted.

Top 20 by Significance

15 May 2018

Top 20 records on 15 May 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 2018	Madison, US	daily rain	65.8 mm (2.6 in)	43.4 mm (1.7 in)	117 years	68 of 100 (Major)
15 May 2018	Iola 1 W, US	daily rain	84.6 mm (3.3 in)	41.2 mm (1.6 in)	108 years	67 of 100 (Major)
15 May 2018	Luray 5 E, US	daily rain	73.7 mm (2.9 in)	48.3 mm (1.9 in)	60 years	65 of 100 (Major)
15 May 2018	Clarksburg 1, US	daily rain	63.5 mm (2.5 in)	32.3 mm (1.3 in)	72 years	65 of 100 (Major)
15 May 2018	Newkirk 5NE, US	daily rain	74.2 mm (2.9 in)	43.7 mm (1.7 in)	95 years	63 of 100 (Major)
15 May 2018	Le Roy, US	daily rain	95.3 mm (3.8 in)	64.8 mm (2.6 in)	32 years	59 of 100 (Notable)
15 May 2018	Maraza, AZ	daily rain	99.3 mm (3.9 in)	75.3 mm (3.0 in)	37 years	57 of 100 (Notable)
15 May 2018	Goychay, AZ	daily rain	99.1 mm (3.9 in)	79.0 mm (3.1 in)	28 years	56 of 100 (Notable)
15 May 2018	Arkansas City, US	daily rain	46.7 mm (1.8 in)	27.4 mm (1.1 in)	97 years	55 of 100 (Notable)
15 May 2018	Chitradurga, IN	daily rain	54.4 mm (2.1 in)	29.0 mm (1.1 in)	84 years	51 of 100 (Notable)
15 May 2018	Virgil, US	daily rain	88.9 mm (3.5 in)	64.0 mm (2.5 in)	24 years	51 of 100 (Notable)
15 May 2018	New Orleans Audubon, US	daily high max	36.1 C (97.0 F)	2.8 C (5.0 F)	103 years	50 of 100 (Notable)
15 May 2018	Phan Thiet, VN	daily low min	20.7 C (69.3 F)	3.3 C (5.9 F)	44 years	50 of 100 (Notable)
15 May 2018	Fall Rvr Lake, US	daily rain	66.3 mm (2.6 in)	29.0 mm (1.1 in)	71 years	49 of 100 (Notable)
15 May 2018	Darby, US	daily high min	16.7 C (62.1 F)	7.3 C (13.1 F)	60 years	48 of 100 (Notable)
15 May 2018	Jefferson 2 E, US	daily high max	30.6 C (87.1 F)	2.8 C (5.0 F)	121 years	46 of 100 (Notable)
15 May 2018	Tabora Airport, TZ	monthly rain	99.1 mm (3.9 in)	19.9 mm (0.8 in)	36 years	45 of 100 (Notable)
15 May 2018	Robinson, US	daily high max	34.4 C (93.9 F)	2.7 C (4.9 F)	107 years	45 of 100 (Notable)
15 May 2018	Moran, US	daily rain	42.4 mm (1.7 in)	8.1 mm (0.32 in)	121 years	45 of 100 (Notable)
15 May 2018	Keshan, CN	daily rain	33.3 mm (1.3 in)	15.9 mm (0.6 in)	45 years	44 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

1820 to 2018

Records set or tied on this calendar date in each year from 1820 to 2018. 2018 had 1,074 records.

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

Records on 05-15 in each year
Year	Records
1820	1
1825	1
1831	1
1832	1
1837	2
1845	1
1847	2
1848	1
1855	2
1857	2
1859	1
1862	1
1863	1
1865	1
1866	2
1867	1
1868	2
1870	1
1871	3
1874	2
1876	4
1878	1
1879	2
1881	1
1883	1
1885	1
1886	2
1888	3
1891	3
1893	5
1894	2
1895	4
1896	2
1897	4
1898	3
1899	9
1900	9
1901	2
1902	9
1903	4
1904	13
1905	16
1906	10
1907	27
1908	25
1909	89
1910	27
1911	27
1912	26
1913	60
1914	16
1915	236
1916	27
1917	80
1918	133
1919	25
1920	58
1921	92
1922	30
1923	125
1924	174
1925	100
1926	161
1927	191
1928	144
1929	161
1930	136
1931	459
1932	368
1933	439
1934	227
1935	288
1936	372
1937	373
1938	393
1939	351
1940	179
1941	454
1942	701
1943	568
1944	630
1945	588
1946	238
1947	334
1948	264
1949	363
1950	260
1951	736
1952	476
1953	426
1954	355
1955	538
1956	466
1957	521
1958	605
1959	764
1960	291
1961	508
1962	1,128
1963	782
1964	347
1965	320
1966	389
1967	609
1968	1,019
1969	790
1970	512
1971	351
1972	484
1973	818
1974	1,230
1975	372
1976	803
1977	1,186
1978	922
1979	404
1980	625
1981	586
1982	500
1983	1,215
1984	1,059
1985	649
1986	679
1987	1,073
1988	643
1989	552
1990	776
1991	1,179
1992	944
1993	784
1994	910
1995	1,750
1996	1,452
1997	1,175
1998	1,641
1999	810
2000	850
2001	1,280
2002	801
2003	1,023
2004	1,046
2005	767
2006	955
2007	949
2008	995
2009	675
2010	1,088
2011	1,298
2012	751
2013	1,081
2014	1,411
2015	717
2016	890
2017	435
2018	1,074
2019	627
2020	472
2021	412
2022	847
2023	566
2024	596
2025	801
2026	481

Download the Data

Data for records on 2018-05-15: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	808
20 to 40	13
40 to 60	6
60 to 80	4
80 to 100	1