Weather Records on 15 May 1987

1,073 weather records were set or tied worldwide on 15 May 1987. Highest significance: Ash Fork 6 N, US.

Key Facts for 15 May 1987

On 15 May 1987, 1,073 weather records were set or tied at long-record stations worldwide.
686 were record highs and 113 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 23 monthly and 1,049 daily.
Ash Fork 6 N set a daily record precipitation of 37.8 mm (1.5 in) on 15 May 1987.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 427 records.

Record Map

1,073 stations

1,073 station records on 15 May 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ash Fork 6 N	United States	Record daily precipitation	37.8 mm (1.5 in)	59 of 100 (Notable)
Robert Lee 4WSW	United States	Record daily precipitation	69.1 mm (2.7 in)	55 of 100 (Notable)
Erebango	Brazil	Record daily precipitation	146.0 mm (5.7 in)	49 of 100 (Notable)
Rio Pequeno	Brazil	Record daily precipitation	59.6 mm (2.3 in)	49 of 100 (Notable)
Tereza Cristina	Brazil	Record daily precipitation	76.9 mm (3.0 in)	48 of 100 (Notable)
Osijek	Croatia	Record daily precipitation	50.6 mm (2.0 in)	48 of 100 (Notable)
Jal	United States	Record daily precipitation	57.2 mm (2.3 in)	48 of 100 (Notable)
Jamestown State Hosp	United States	Record high minimum temperature	22.2 C (72.0 F)	47 of 100 (Notable)
Winnemucca AP	United States	Record high minimum temperature	14.4 C (57.9 F)	46 of 100 (Notable)
Mullaley (Bando)	Australia	Record daily precipitation	50.6 mm (2.0 in)	45 of 100 (Notable)
Bairro Do Pinheiro	Brazil	Record daily precipitation	49.9 mm (2.0 in)	44 of 100 (Notable)
Vale	United States	Record high minimum temperature	16.7 C (62.1 F)	44 of 100 (Notable)
Maryborough	Australia	Record daily precipitation	26.6 mm (1.0 in)	43 of 100 (Notable)
Ponta Grossa-Vila Velha	Brazil	Record daily precipitation	77.4 mm (3.0 in)	43 of 100 (Notable)
De Sabla	United States	Record high maximum temperature	37.8 C (100.0 F)	43 of 100 (Notable)
Ukiah	United States	Record high minimum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Deseret	United States	Record high minimum temperature	13.3 C (55.9 F)	43 of 100 (Notable)
Garcia	Brazil	Record daily precipitation	46.6 mm (1.8 in)	41 of 100 (Notable)
Diversion Dam	United States	Record high minimum temperature	15.0 C (59.0 F)	41 of 100 (Notable)
Ely AP	United States	Record high minimum temperature	8.9 C (48.0 F)	41 of 100 (Notable)
Itapeuna	Brazil	Record daily precipitation	94.8 mm (3.7 in)	40 of 100 (Notable)
Madrid	United States	Record high minimum temperature	17.8 C (64.0 F)	40 of 100 (Notable)
Hogsett Rc Byrd Dam	United States	Record daily precipitation	41.9 mm (1.6 in)	40 of 100 (Notable)
Wendover AP AWOS	United States	Record high minimum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Outtrim	Australia	Record daily precipitation	38.0 mm (1.5 in)	39 of 100 (Notable)
Ojai	United States	Record high minimum temperature	15.0 C (59.0 F)	39 of 100 (Notable)
Cloudcroft	United States	Record daily precipitation	48.3 mm (1.9 in)	39 of 100 (Notable)
Riverside 7 SSW	United States	Record high minimum temperature	13.3 C (55.9 F)	39 of 100 (Notable)
Muenster	United States	Record daily precipitation	71.6 mm (2.8 in)	39 of 100 (Notable)
Divisa de Anitapolis	Brazil	Record daily precipitation	58.4 mm (2.3 in)	38 of 100 (Notable)
Jakutsk	Russia	Record low maximum temperature	1.2 C (34.2 F)	38 of 100 (Notable)
Katylga	Russia	Record daily precipitation	27.8 mm (1.1 in)	38 of 100 (Notable)
Santa Barbara	United States	Record high minimum temperature	16.7 C (62.1 F)	38 of 100 (Notable)
Pascagoula 3 NE	United States	Record daily precipitation	43.7 mm (1.7 in)	38 of 100 (Notable)
Mayville	United States	Record high maximum temperature	35.6 C (96.1 F)	38 of 100 (Notable)
Rantoul	United States	Record high maximum temperature	33.9 C (93.0 F)	38 of 100 (Notable)
Santa Paula	United States	Record high minimum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Blakely	United States	Record daily precipitation	71.9 mm (2.8 in)	37 of 100 (Notable)
Uruapan (Smn)	Mexico	Record high minimum temperature	18.9 C (66.0 F)	36 of 100 (Notable)
Electra P H	United States	Record high minimum temperature	15.6 C (60.1 F)	36 of 100 (Notable)
Rockville	United States	Record high maximum temperature	31.7 C (89.1 F)	36 of 100 (Notable)
Clover Valley	United States	Record high minimum temperature	10.0 C (50.0 F)	36 of 100 (Notable)
Bishop AP	United States	Record high minimum temperature	12.2 C (54.0 F)	36 of 100 (Notable)
Lemon Cove	United States	Record high minimum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Saint Maries	United States	Record high minimum temperature	12.8 C (55.0 F)	35 of 100 (Notable)
Santa Cruz	Brazil	Record daily precipitation	70.5 mm (2.8 in)	34 of 100 (Routine)
Brusque (Pcd)	Brazil	Record daily precipitation	57.9 mm (2.3 in)	34 of 100 (Routine)
Knin	Croatia	Record daily precipitation	43.7 mm (1.7 in)	34 of 100 (Routine)
Crescent City 3 NNW	United States	Record high minimum temperature	11.7 C (53.1 F)	34 of 100 (Routine)
Caldwell	United States	Record high minimum temperature	16.7 C (62.1 F)	34 of 100 (Routine)
Windsor	United States	Record high maximum temperature	31.7 C (89.1 F)	34 of 100 (Routine)
Grand Forks UNIV (NWS)	United States	Record high maximum temperature	35.6 C (96.1 F)	34 of 100 (Routine)
Hot Springs 1 NNE	United States	Record high maximum temperature	33.3 C (91.9 F)	33 of 100 (Routine)
Alturas	United States	Record high maximum temperature	30.6 C (87.1 F)	33 of 100 (Routine)
Colfax	United States	Record high minimum temperature	17.2 C (63.0 F)	33 of 100 (Routine)
Ft Bidwell	United States	Record high minimum temperature	12.8 C (55.0 F)	33 of 100 (Routine)
Yosemite Park HQ	United States	Record high minimum temperature	12.8 C (55.0 F)	33 of 100 (Routine)
Bliss 4 NW	United States	Record high minimum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Stephan 2 NW	United States	Record high maximum temperature	32.2 C (90.0 F)	33 of 100 (Routine)
Lomba Alta	Brazil	Record daily precipitation	69.8 mm (2.7 in)	32 of 100 (Routine)

Counts by Type and Timescale

1,073 records

Records set or tied on 15 May 1987 by type: Highest daily maximum 281, Lowest daily maximum 38, Highest daily minimum 405, Lowest daily minimum 75, Heaviest daily rainfall 274.

Records on 15 May 1987 by type
Record type	Records
Highest daily maximum	281
Lowest daily maximum	38
Highest daily minimum	405
Lowest daily minimum	75
Heaviest daily rainfall	274
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 May 1987 by timescale: all-time 1, monthly 23, daily 1,049.

How Much Records Were Beaten By

848 broken records

Margins by which the 848 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 117.8. Ties are not counted.

Top 20 by Significance

15 May 1987

Top 20 records on 15 May 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1987	Ash Fork 6 N, US	daily rain	37.8 mm (1.5 in)	26.4 mm (1.0 in)	37 years	59 of 100 (Notable)
15 May 1987	Robert Lee 4WSW, US	daily rain	69.1 mm (2.7 in)	56.4 mm (2.2 in)	33 years	55 of 100 (Notable)
15 May 1987	Erebango, BR	daily rain	146.0 mm (5.7 in)	117.8 mm (4.6 in)	18 years	49 of 100 (Notable)
15 May 1987	Rio Pequeno, BR	daily rain	59.6 mm (2.3 in)	52.1 mm (2.1 in)	18 years	49 of 100 (Notable)
15 May 1987	Tereza Cristina, BR	daily rain	76.9 mm (3.0 in)	67.5 mm (2.7 in)	21 years	48 of 100 (Notable)
15 May 1987	Osijek, HR	daily rain	50.6 mm (2.0 in)	11.1 mm (0.4 in)	84 years	48 of 100 (Notable)
15 May 1987	Jal, US	daily rain	57.2 mm (2.3 in)	21.6 mm (0.9 in)	66 years	48 of 100 (Notable)
15 May 1987	Jamestown State Hosp, US	monthly high min	22.2 C (72.0 F)	1.1 C (2.0 F)	85 years	47 of 100 (Notable)
15 May 1987	Winnemucca AP, US	daily high min	14.4 C (57.9 F)	3.3 C (5.9 F)	93 years	46 of 100 (Notable)
15 May 1987	Mullaley (Bando), AU	daily rain	50.6 mm (2.0 in)	17.6 mm (0.7 in)	78 years	45 of 100 (Notable)
15 May 1987	Bairro Do Pinheiro, BR	daily rain	49.9 mm (2.0 in)	35.3 mm (1.4 in)	26 years	44 of 100 (Notable)
15 May 1987	Vale, US	daily high min	16.7 C (62.1 F)	3.9 C (7.0 F)	89 years	44 of 100 (Notable)
15 May 1987	Maryborough, AU	daily rain	26.6 mm (1.0 in)	10.1 mm (0.4 in)	86 years	43 of 100 (Notable)
15 May 1987	Ponta Grossa-Vila Velha, BR	daily rain	77.4 mm (3.0 in)	59.4 mm (2.3 in)	21 years	43 of 100 (Notable)
15 May 1987	De Sabla, US	monthly high max	37.8 C (100.0 F)	1.7 C (3.1 F)	76 years	43 of 100 (Notable)
15 May 1987	Ukiah, US	daily high min	15.6 C (60.1 F)	3.9 C (7.0 F)	72 years	43 of 100 (Notable)
15 May 1987	Deseret, US	daily high min	13.3 C (55.9 F)	2.7 C (4.9 F)	93 years	43 of 100 (Notable)
15 May 1987	Garcia, BR	daily rain	46.6 mm (1.8 in)	39.3 mm (1.5 in)	26 years	41 of 100 (Notable)
15 May 1987	Diversion Dam, US	daily high min	15.0 C (59.0 F)	6.7 C (12.1 F)	61 years	41 of 100 (Notable)
15 May 1987	Ely AP, US	daily high min	8.9 C (48.0 F)	1.7 C (3.1 F)	93 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

1820 to 1987

Records set or tied on this calendar date in each year from 1820 to 1987. 1987 had 1,073 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 1987-05-15: 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	815
20 to 40	23
40 to 60	8
60 to 80	1
80 to 100	0
100 to 120	1