Weather Records on 18 April 1987

1,068 weather records were set or tied worldwide on 18 April 1987. Highest significance: Mayaguez City, PR.

Key Facts for 18 April 1987

On 18 April 1987, 1,068 weather records were set or tied at long-record stations worldwide.
885 were record highs and 61 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 47 monthly and 1,020 daily.
Mayaguez City set a monthly record high minimum temperature of 26.1 C (79.0 F) on 18 April 1987.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 464 records.

Record Map

1,068 stations

1,068 station records on 18 April 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mayaguez City	Puerto Rico [United States]	Record high minimum temperature	26.1 C (79.0 F)	46 of 100 (Notable)
Galway	Ireland	Record high minimum temperature	12.4 C (54.3 F)	44 of 100 (Notable)
Arkadelphia 2 N	United States	Record high maximum temperature	34.4 C (93.9 F)	44 of 100 (Notable)
Hot Springs 1 NNE	United States	Record high maximum temperature	33.3 C (91.9 F)	42 of 100 (Notable)
Eureka Springs 3 WNW	United States	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Red Lake Falls	United States	Record high minimum temperature	14.4 C (57.9 F)	41 of 100 (Notable)
Grand Forks UNIV (NWS)	United States	Record high minimum temperature	13.9 C (57.0 F)	41 of 100 (Notable)
Dublin Phoenix Park	Ireland	Record high minimum temperature	10.8 C (51.4 F)	40 of 100 (Notable)
Forest Grove	United States	Record low maximum temperature	8.3 C (46.9 F)	39 of 100 (Notable)
Beaver	United States	Record high minimum temperature	11.7 C (53.1 F)	39 of 100 (Notable)
Ocotlan de Morelos	Mexico	Record daily precipitation	62.2 mm (2.4 in)	37 of 100 (Notable)
Lebanon 2W	United States	Record high minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Eureka	United States	Record high maximum temperature	26.1 C (79.0 F)	37 of 100 (Notable)
Ft Duchesne	United States	Record high maximum temperature	28.3 C (82.9 F)	37 of 100 (Notable)
New Orleans Audubon	United States	Record high maximum temperature	32.8 C (91.0 F)	37 of 100 (Notable)
Griffiss AFB	United States	Record high minimum temperature	10.6 C (51.1 F)	37 of 100 (Notable)
Cheesman	United States	Record high maximum temperature	26.1 C (79.0 F)	36 of 100 (Notable)
Montrose #2	United States	Record high maximum temperature	27.2 C (81.0 F)	36 of 100 (Notable)
Pine Rvr Dam	United States	Record high maximum temperature	31.1 C (88.0 F)	36 of 100 (Notable)
Red Lake Indian Agcy	United States	Record high maximum temperature	24.4 C (75.9 F)	36 of 100 (Notable)
Healdton 3 E	United States	Record high maximum temperature	35.0 C (95.0 F)	36 of 100 (Notable)
Crockett	United States	Record high maximum temperature	33.3 C (91.9 F)	36 of 100 (Notable)
Long Prairie	United States	Record high maximum temperature	30.6 C (87.1 F)	35 of 100 (Notable)
Milaca	United States	Record high maximum temperature	29.4 C (84.9 F)	35 of 100 (Notable)
Sandy Lake Dam Libby	United States	Record high maximum temperature	30.0 C (86.0 F)	35 of 100 (Notable)
Forman 5 SSE	United States	Record high minimum temperature	12.8 C (55.0 F)	35 of 100 (Notable)
Bristow	United States	Record high maximum temperature	36.1 C (97.0 F)	35 of 100 (Notable)
Guthrie 5S	United States	Record high maximum temperature	36.7 C (98.1 F)	35 of 100 (Notable)
Prescott 2 NNW	United States	Record high maximum temperature	33.3 C (91.9 F)	34 of 100 (Routine)
Watersmeet	United States	Record high maximum temperature	29.4 C (84.9 F)	34 of 100 (Routine)
El Reno 1 N	United States	Record high maximum temperature	35.0 C (95.0 F)	34 of 100 (Routine)
Grapevine Dam	United States	Record high maximum temperature	33.3 C (91.9 F)	34 of 100 (Routine)
Mt Pleasant	United States	Record high maximum temperature	35.0 C (95.0 F)	34 of 100 (Routine)
San Marcos	United States	Record high maximum temperature	35.0 C (95.0 F)	34 of 100 (Routine)
Texarkana Webb Fld	United States	Record high maximum temperature	33.9 C (93.0 F)	34 of 100 (Routine)
Nouakchott	Mauritania	Record high minimum temperature	27.0 C (80.6 F)	33 of 100 (Routine)
Villa de Chiapilla	Mexico	Record daily precipitation	41.9 mm (1.6 in)	33 of 100 (Routine)
Benton	United States	Record high maximum temperature	31.1 C (88.0 F)	33 of 100 (Routine)
Mora	United States	Record high maximum temperature	31.1 C (88.0 F)	33 of 100 (Routine)
Winton Pwr Plt	United States	Record high maximum temperature	27.2 C (81.0 F)	33 of 100 (Routine)
Moccasin Exp STN	United States	Record daily snowfall	20.3 cm (8.0 in)	33 of 100 (Routine)
Perry	United States	Record high maximum temperature	37.8 C (100.0 F)	33 of 100 (Routine)
Sallisaw 2 NW	United States	Record high maximum temperature	32.8 C (91.0 F)	33 of 100 (Routine)
Timber Lake	United States	Record high maximum temperature	32.8 C (91.0 F)	33 of 100 (Routine)
Sugar Land	United States	Record high maximum temperature	33.3 C (91.9 F)	33 of 100 (Routine)
Garrison	United States	Record high minimum temperature	8.9 C (48.0 F)	33 of 100 (Routine)
Buffalo	United States	Record high maximum temperature	27.2 C (81.0 F)	33 of 100 (Routine)
Malvern	United States	Record high maximum temperature	33.9 C (93.0 F)	32 of 100 (Routine)
Sterling	United States	Record high maximum temperature	33.3 C (91.9 F)	32 of 100 (Routine)
Hugoton	United States	Record high maximum temperature	34.4 C (93.9 F)	32 of 100 (Routine)
McPherson	United States	Record high maximum temperature	33.3 C (91.9 F)	32 of 100 (Routine)
Hallock	United States	Record high minimum temperature	9.4 C (48.9 F)	32 of 100 (Routine)
Bridgeport	United States	Record high maximum temperature	31.7 C (89.1 F)	32 of 100 (Routine)
Magdalena	United States	Record high maximum temperature	27.8 C (82.0 F)	32 of 100 (Routine)
Mayville	United States	Record high maximum temperature	31.1 C (88.0 F)	32 of 100 (Routine)
Pawhuska	United States	Record high maximum temperature	35.0 C (95.0 F)	32 of 100 (Routine)
Lusk 2 SW	United States	Record high maximum temperature	27.2 C (81.0 F)	32 of 100 (Routine)
Wheatland 4N	United States	Record high maximum temperature	30.6 C (87.1 F)	32 of 100 (Routine)
Chanute Martin Johnson AP	United States	Record high maximum temperature	31.1 C (88.0 F)	32 of 100 (Routine)
Newport	United States	Record low minimum temperature	-5.0 C (23.0 F)	32 of 100 (Routine)

Counts by Type and Timescale

1,068 records

Records set or tied on 18 April 1987 by type: Highest daily maximum 648, Lowest daily maximum 33, Highest daily minimum 237, Lowest daily minimum 28, Heaviest daily rainfall 110, Heaviest daily snowfall 9, Deepest snow cover 3.

Records on 18 April 1987 by type
Record type	Records
Highest daily maximum	648
Lowest daily maximum	33
Highest daily minimum	237
Lowest daily minimum	28
Heaviest daily rainfall	110
Heaviest daily snowfall	9
Deepest snow cover	3

Records on 18 April 1987 by timescale: all-time 1, monthly 47, daily 1,020.

How Much Records Were Beaten By

821 broken records

Margins by which the 821 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 190.0. Ties are not counted.

Top 20 by Significance

18 April 1987

Top 20 records on 18 April 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1987	Mayaguez City, PR	monthly high min	26.1 C (79.0 F)	0.5 C (0.9 F)	86 years	46 of 100 (Notable)
18 April 1987	Galway, IE	daily high min	12.4 C (54.3 F)	1.3 C (2.3 F)	125 years	44 of 100 (Notable)
18 April 1987	Arkadelphia 2 N, US	monthly high max	34.4 C (93.9 F)	0.5 C (0.9 F)	85 years	44 of 100 (Notable)
18 April 1987	Hot Springs 1 NNE, US	daily high max	33.3 C (91.9 F)	2.2 C (4.0 F)	94 years	42 of 100 (Notable)
18 April 1987	Eureka Springs 3 WNW, US	monthly high max	33.9 C (93.0 F)	0.6 C (1.1 F)	74 years	41 of 100 (Notable)
18 April 1987	Red Lake Falls, US	daily high min	14.4 C (57.9 F)	7.2 C (13.0 F)	70 years	41 of 100 (Notable)
18 April 1987	Grand Forks UNIV (NWS), US	daily high min	13.9 C (57.0 F)	4.5 C (8.1 F)	80 years	41 of 100 (Notable)
18 April 1987	Dublin Phoenix Park, IE	daily high min	10.8 C (51.4 F)	0.8 C (1.4 F)	93 years	40 of 100 (Notable)
18 April 1987	Forest Grove, US	daily low max	8.3 C (46.9 F)	1.7 C (3.1 F)	92 years	39 of 100 (Notable)
18 April 1987	Beaver, US	daily high min	11.7 C (53.1 F)	5.0 C (9.0 F)	64 years	39 of 100 (Notable)
18 April 1987	Ocotlan de Morelos, MX	daily rain	62.2 mm (2.4 in)	33.8 mm (1.3 in)	14 years	37 of 100 (Notable)
18 April 1987	Lebanon 2W, US	daily high min	20.0 C (68.0 F)	0.6 C (1.1 F)	90 years	37 of 100 (Notable)
18 April 1987	Eureka, US	daily high max	26.1 C (79.0 F)	1.7 C (3.1 F)	84 years	37 of 100 (Notable)
18 April 1987	Ft Duchesne, US	daily high max	28.3 C (82.9 F)	1.6 C (2.9 F)	84 years	37 of 100 (Notable)
18 April 1987	New Orleans Audubon, US	daily high max	32.8 C (91.0 F)	1.7 C (3.1 F)	78 years	37 of 100 (Notable)
18 April 1987	Griffiss AFB, US	daily high min	10.6 C (51.1 F)	0.6 C (1.1 F)	90 years	37 of 100 (Notable)
18 April 1987	Cheesman, US	daily high max	26.1 C (79.0 F)	2.8 C (5.0 F)	82 years	36 of 100 (Notable)
18 April 1987	Montrose #2, US	daily high max	27.2 C (81.0 F)	1.1 C (2.0 F)	89 years	36 of 100 (Notable)
18 April 1987	Pine Rvr Dam, US	daily high max	31.1 C (88.0 F)	4.4 C (7.9 F)	72 years	36 of 100 (Notable)
18 April 1987	Red Lake Indian Agcy, US	daily high max	24.4 C (75.9 F)	0.5 C (0.9 F)	91 years	36 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

1793 to 1987

Records set or tied on this calendar date in each year from 1793 to 1987. 1987 had 1,068 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1987-04-18: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 25	809
25 to 50	10
50 to 75	0
75 to 100	1
100 to 125	0
125 to 150	0
150 to 175	0
175 to 200	1