Weather Records on 18 May 1987

823 weather records were set or tied worldwide on 18 May 1987. Highest significance: Jerome, US.

Key Facts for 18 May 1987

On 18 May 1987, 823 weather records were set or tied at long-record stations worldwide.
336 were record highs and 190 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 32 monthly and 789 daily.
Jerome set a monthly record daily precipitation of 50.8 mm (2.0 in) on 18 May 1987.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 440 records.

Record Map

823 stations

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

Weather records on 18 May 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Jerome	United States	Record daily precipitation	50.8 mm (2.0 in)	67 of 100 (Major)
Circleville	United States	Record daily precipitation	53.3 mm (2.1 in)	66 of 100 (Major)
Darwin Botanic Gardens	Australia	Record daily precipitation	122.2 mm (4.8 in)	65 of 100 (Major)
Hobart 2 WNW	United States	Record daily precipitation	66.8 mm (2.6 in)	64 of 100 (Major)
Barkestad	Norway	Record daily precipitation	44.5 mm (1.8 in)	55 of 100 (Notable)
Forrest State Forest	Australia	Record daily precipitation	45.0 mm (1.8 in)	52 of 100 (Notable)
Malmberget	Sweden	Record daily precipitation	25.0 mm (1.0 in)	50 of 100 (Notable)
Ogden Dunes	United States	Record daily precipitation	48.3 mm (1.9 in)	48 of 100 (Notable)
Two Harbors	United States	Record daily precipitation	47.5 mm (1.9 in)	48 of 100 (Notable)
Ashley	United States	Record daily precipitation	28.4 mm (1.1 in)	47 of 100 (Notable)
Nguiu	Australia	Record daily precipitation	26.6 mm (1.0 in)	46 of 100 (Notable)
Queluz (Centro Saude)	Brazil	Record daily precipitation	40.9 mm (1.6 in)	46 of 100 (Notable)
Champaign 3S	United States	Record daily precipitation	41.4 mm (1.6 in)	45 of 100 (Notable)
Thorhult	United States	Record daily precipitation	43.2 mm (1.7 in)	44 of 100 (Notable)
Ogden Sugar Factory	United States	Record daily precipitation	38.9 mm (1.5 in)	44 of 100 (Notable)
Brimson 2S	United States	Record daily precipitation	52.6 mm (2.1 in)	43 of 100 (Notable)
Warsaw	United States	Record daily precipitation	74.4 mm (2.9 in)	42 of 100 (Notable)
Lewistown	United States	Record daily precipitation	69.6 mm (2.7 in)	42 of 100 (Notable)
Dardanelle	United States	Record daily precipitation	31.2 mm (1.2 in)	41 of 100 (Notable)
Darwin Airport	Australia	Record daily precipitation	89.6 mm (3.5 in)	39 of 100 (Notable)
Manton Dam	Australia	Record daily precipitation	50.4 mm (2.0 in)	39 of 100 (Notable)
Ottawa 4SW	United States	Record daily precipitation	38.9 mm (1.5 in)	39 of 100 (Notable)
Laporte	United States	Record daily precipitation	43.9 mm (1.7 in)	39 of 100 (Notable)
Lamoni	United States	Record daily precipitation	40.4 mm (1.6 in)	39 of 100 (Notable)
Madison	United States	Record daily precipitation	43.2 mm (1.7 in)	39 of 100 (Notable)
Wetumpka	United States	Record daily precipitation	55.9 mm (2.2 in)	38 of 100 (Notable)
Tamiami Trail 40 Mi Bend	United States	Record daily precipitation	72.4 mm (2.9 in)	38 of 100 (Notable)
Walnut	United States	Record daily precipitation	55.4 mm (2.2 in)	38 of 100 (Notable)
Bayfield 6 N	United States	Record daily precipitation	45.7 mm (1.8 in)	38 of 100 (Notable)
Brodhead Wwtp	United States	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Uruapan (Smn)	Mexico	Record high minimum temperature	18.9 C (66.0 F)	37 of 100 (Notable)
Sparta 1 W	United States	Record high minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Valparaiso Wtr Wks	United States	Record daily precipitation	41.1 mm (1.6 in)	37 of 100 (Notable)
Aberdeen	United States	Record high minimum temperature	20.6 C (69.1 F)	37 of 100 (Notable)
University	United States	Record high minimum temperature	21.1 C (70.0 F)	37 of 100 (Notable)
Barra Do Funchal	Brazil	Record daily precipitation	26.4 mm (1.0 in)	36 of 100 (Notable)
Fazenda Cascata	Brazil	Record daily precipitation	53.3 mm (2.1 in)	36 of 100 (Notable)
Irapuato	Mexico	Record low minimum temperature	8.3 C (46.9 F)	36 of 100 (Notable)
Paoli	United States	Record high minimum temperature	20.0 C (68.0 F)	36 of 100 (Notable)
Greenville 2 NNE	United States	Record daily precipitation	47.5 mm (1.9 in)	36 of 100 (Notable)
Warren 3 S	United States	Record daily precipitation	36.1 mm (1.4 in)	36 of 100 (Notable)
Presa Plutarco Elias Calles	Mexico	Record low maximum temperature	16.1 C (61.0 F)	35 of 100 (Notable)
Excame	Mexico	Record low maximum temperature	22.2 C (72.0 F)	35 of 100 (Notable)
Stanley	United States	Record high minimum temperature	5.6 C (42.1 F)	35 of 100 (Notable)
Paris Stp	United States	Record high minimum temperature	20.0 C (68.0 F)	35 of 100 (Notable)
Morgantown Muni AP	United States	Record daily precipitation	32.0 mm (1.3 in)	35 of 100 (Notable)
Fazenda Vista Redonda	Brazil	Record daily precipitation	46.1 mm (1.8 in)	34 of 100 (Routine)
Presa El Niagara	Mexico	Record low maximum temperature	20.0 C (68.0 F)	34 of 100 (Routine)
Colotlan (Dge)	Mexico	Record low maximum temperature	20.0 C (68.0 F)	34 of 100 (Routine)
Tuscola	United States	Record high minimum temperature	20.6 C (69.1 F)	34 of 100 (Routine)
Columbia	United States	Record daily precipitation	37.3 mm (1.5 in)	34 of 100 (Routine)
El Cuije	Mexico	Record daily precipitation	25.9 mm (1.0 in)	33 of 100 (Routine)
Jalostotitlan	Mexico	Record low maximum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Gravette	United States	Record high maximum temperature	31.7 C (89.1 F)	33 of 100 (Routine)
Watersmeet	United States	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)
W Branch 3SE	United States	Record high maximum temperature	32.2 C (90.0 F)	33 of 100 (Routine)
Pokegama Dam	United States	Record daily precipitation	40.6 mm (1.6 in)	33 of 100 (Routine)
Corinne	United States	Record daily precipitation	29.0 mm (1.1 in)	33 of 100 (Routine)
Sage 4 NNW	United States	Record high minimum temperature	8.9 C (48.0 F)	33 of 100 (Routine)
Nicosia	Cyprus	Record high minimum temperature	20.6 C (69.1 F)	32 of 100 (Routine)

Counts by Type and Timescale

823 records

Records set or tied on 18 May 1987 by type: Highest daily maximum 128, Lowest daily maximum 141, Highest daily minimum 208, Lowest daily minimum 49, Heaviest daily rainfall 297.

Records on 18 May 1987 by type
Record type	Records
Highest daily maximum	128
Lowest daily maximum	141
Highest daily minimum	208
Lowest daily minimum	49
Heaviest daily rainfall	297
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 May 1987 by timescale: all-time 2, monthly 32, daily 789.

How Much Records Were Beaten By

635 broken records

Margins by which the 635 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 60.2. Ties are not counted.

Top 20 by Significance

18 May 1987

Top 20 records on 18 May 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1987	Jerome, US	monthly rain	50.8 mm (2.0 in)	15.2 mm (0.6 in)	79 years	67 of 100 (Major)
18 May 1987	Circleville, US	monthly rain	53.3 mm (2.1 in)	27.9 mm (1.1 in)	42 years	66 of 100 (Major)
18 May 1987	Darwin Botanic Gardens, AU	monthly rain	122.2 mm (4.8 in)	60.2 mm (2.4 in)	19 years	65 of 100 (Major)
18 May 1987	Hobart 2 WNW, US	daily rain	66.8 mm (2.6 in)	43.9 mm (1.7 in)	60 years	64 of 100 (Major)
18 May 1987	Barkestad, NO	daily rain	44.5 mm (1.8 in)	26.5 mm (1.0 in)	22 years	55 of 100 (Notable)
18 May 1987	Forrest State Forest, AU	daily rain	45.0 mm (1.8 in)	17.3 mm (0.7 in)	76 years	52 of 100 (Notable)
18 May 1987	Malmberget, SE	daily rain	25.0 mm (1.0 in)	21.6 mm (0.9 in)	21 years	50 of 100 (Notable)
18 May 1987	Ogden Dunes, US	daily rain	48.3 mm (1.9 in)	36.4 mm (1.4 in)	17 years	48 of 100 (Notable)
18 May 1987	Two Harbors, US	daily rain	47.5 mm (1.9 in)	25.1 mm (1.0 in)	48 years	48 of 100 (Notable)
18 May 1987	Ashley, US	daily rain	28.4 mm (1.1 in)	12.1 mm (0.5 in)	88 years	47 of 100 (Notable)
18 May 1987	Nguiu, AU	daily rain	26.6 mm (1.0 in)	24.3 mm (1.0 in)	70 years	46 of 100 (Notable)
18 May 1987	Queluz (Centro Saude), BR	daily rain	40.9 mm (1.6 in)	26.9 mm (1.1 in)	38 years	46 of 100 (Notable)
18 May 1987	Champaign 3S, US	daily rain	41.4 mm (1.6 in)	15.7 mm (0.6 in)	80 years	45 of 100 (Notable)
18 May 1987	Thorhult, US	daily rain	43.2 mm (1.7 in)	26.7 mm (1.1 in)	22 years	44 of 100 (Notable)
18 May 1987	Ogden Sugar Factory, US	daily rain	38.9 mm (1.5 in)	25.4 mm (1.0 in)	9 years	44 of 100 (Notable)
18 May 1987	Brimson 2S, US	daily rain	52.6 mm (2.1 in)	30.8 mm (1.2 in)	21 years	43 of 100 (Notable)
18 May 1987	Warsaw, US	monthly rain	74.4 mm (2.9 in)	22.3 mm (0.9 in)	2 years	42 of 100 (Notable)
18 May 1987	Lewistown, US	daily rain	69.6 mm (2.7 in)	32.8 mm (1.3 in)	20 years	42 of 100 (Notable)
18 May 1987	Dardanelle, US	daily rain	31.2 mm (1.2 in)	3.3 mm (0.13 in)	97 years	41 of 100 (Notable)
18 May 1987	Darwin Airport, AU	monthly rain	89.6 mm (3.5 in)	31.2 mm (1.2 in)	7 years	39 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 1987

Records set or tied on this calendar date in each year from 1796 to 1987. 1987 had 823 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 1987-05-18: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 10	551
10 to 20	54
20 to 30	19
30 to 40	7
40 to 50	3
50 to 60	0
60 to 70	1