Weather Records on 18 October 1987

518 weather records were set or tied worldwide on 18 October 1987. Highest significance: Swansea Post Office, AU.

Key Facts for 18 October 1987

On 18 October 1987, 518 weather records were set or tied at long-record stations worldwide.
240 were record highs and 167 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 509 daily.
Swansea Post Office set a daily record precipitation of 56.8 mm (2.2 in) on 18 October 1987.
Across 167 earlier years (1794 to 2025) the same calendar date averaged 433 records.

Record Map

518 stations

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

Weather records on 18 October 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Swansea Post Office	Australia	Record daily precipitation	56.8 mm (2.2 in)	66 of 100 (Major)
Kellevie	Australia	Record daily precipitation	40.2 mm (1.6 in)	65 of 100 (Major)
Mombetsu	Japan	Record daily precipitation	45.5 mm (1.8 in)	48 of 100 (Notable)
Manati 2 E	Puerto Rico [United States]	Record high minimum temperature	23.9 C (75.0 F)	43 of 100 (Notable)
Kurilsk	Russia	Record daily precipitation	64.8 mm (2.6 in)	43 of 100 (Notable)
Mount Irving	Australia	Record daily precipitation	46.2 mm (1.8 in)	41 of 100 (Notable)
Gladstone (Old Post Office)	Australia	Record daily precipitation	26.8 mm (1.1 in)	40 of 100 (Notable)
Campania (the Pines)	Australia	Record daily precipitation	26.4 mm (1.0 in)	40 of 100 (Notable)
Humacao 2 SSE	Puerto Rico [United States]	Record daily precipitation	80.0 mm (3.1 in)	39 of 100 (Notable)
Quoiba	Australia	Record daily precipitation	62.0 mm (2.4 in)	38 of 100 (Notable)
Swansea (Kelvedon)	Australia	Record daily precipitation	57.0 mm (2.2 in)	38 of 100 (Notable)
Cranbrook (Cranbrook House)	Australia	Record daily precipitation	48.8 mm (1.9 in)	37 of 100 (Notable)
Zagreb-Gric	Croatia	Record daily precipitation	38.1 mm (1.5 in)	37 of 100 (Notable)
Aurangabad Chikalth	India	Record daily precipitation	56.9 mm (2.2 in)	36 of 100 (Notable)
Wattle Hill	Australia	Record daily precipitation	45.6 mm (1.8 in)	35 of 100 (Notable)
Mayaguez City	Puerto Rico [United States]	Record high minimum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Goodger Store	Australia	Record daily precipitation	100.2 mm (3.9 in)	34 of 100 (Routine)
Maria Island (Darlington)	Australia	Record daily precipitation	31.3 mm (1.2 in)	34 of 100 (Routine)
Tinaroo Falls Dam	Australia	Record daily precipitation	27.0 mm (1.1 in)	33 of 100 (Routine)
El Carmen (Smn)	Mexico	Record low minimum temperature	16.7 C (62.1 F)	33 of 100 (Routine)
Townsville Aero	Australia	Record high maximum temperature	34.6 C (94.3 F)	32 of 100 (Routine)
Omu	Japan	Record daily precipitation	43.0 mm (1.7 in)	32 of 100 (Routine)
Vega de Alatorre	Mexico	Record low minimum temperature	10.6 C (51.1 F)	32 of 100 (Routine)
Abashiri	Japan	Record daily precipitation	34.5 mm (1.4 in)	31 of 100 (Routine)
Juzhno-Kurilsk	Russia	Record daily precipitation	76.8 mm (3.0 in)	31 of 100 (Routine)
Premaydena Hatchery	Australia	Record daily precipitation	55.4 mm (2.2 in)	30 of 100 (Routine)
Teriberka	Russia	Record high minimum temperature	9.2 C (48.6 F)	29 of 100 (Routine)
Laketown	United States	Record high minimum temperature	5.0 C (41.0 F)	29 of 100 (Routine)
Yakutat AP	United States	Record daily precipitation	91.9 mm (3.6 in)	28 of 100 (Routine)
Guantanamo Bay NAS	Cuba	Record high minimum temperature	26.1 C (79.0 F)	27 of 100 (Routine)
Poljarnoe	Russia	Record high maximum temperature	12.6 C (54.7 F)	27 of 100 (Routine)
Tustin Irvine Rch	United States	Record high minimum temperature	17.2 C (63.0 F)	27 of 100 (Routine)
Nubeena	Australia	Record daily precipitation	60.0 mm (2.4 in)	26 of 100 (Routine)
Bombay/Santacruz	India	Record daily precipitation	47.0 mm (1.9 in)	26 of 100 (Routine)
Echeverria	Mexico	Record low minimum temperature	0.6 C (33.1 F)	26 of 100 (Routine)
Santa Isabel 2 ENE	Puerto Rico [United States]	Record daily precipitation	64.5 mm (2.5 in)	26 of 100 (Routine)
Teriberka	Russia	Record high maximum temperature	12.9 C (55.2 F)	26 of 100 (Routine)
Hohhot	China	Record low maximum temperature	4.4 C (39.9 F)	25 of 100 (Routine)
Asmara	Eritrea	Record low minimum temperature	1.8 C (35.2 F)	25 of 100 (Routine)
Ogulin	Croatia	Record daily precipitation	41.3 mm (1.6 in)	25 of 100 (Routine)
Cidra 1 E	Puerto Rico [United States]	Record daily precipitation	47.2 mm (1.9 in)	25 of 100 (Routine)
Gweru	Zimbabwe	Record low minimum temperature	3.9 C (39.0 F)	25 of 100 (Routine)
Yumenzhen	China	Record low minimum temperature	-7.8 C (18.0 F)	24 of 100 (Routine)
Coalcoman (Smn)	Mexico	Record high maximum temperature	35.0 C (95.0 F)	24 of 100 (Routine)
Ixcamilpa (Cfe)	Mexico	Record low minimum temperature	10.0 C (50.0 F)	24 of 100 (Routine)
Vardo	Norway	Record high maximum temperature	12.4 C (54.3 F)	24 of 100 (Routine)
Vajda-Guba	Russia	Record high maximum temperature	10.8 C (51.4 F)	24 of 100 (Routine)
Poljarnoe	Russia	Record high minimum temperature	9.5 C (49.1 F)	24 of 100 (Routine)
Murmansk	Russia	Record high maximum temperature	13.1 C (55.6 F)	24 of 100 (Routine)
Murmansk	Russia	Record high minimum temperature	9.8 C (49.6 F)	24 of 100 (Routine)
Salmon Gums Res.STN.	Australia	Record low minimum temperature	-1.3 C (29.7 F)	23 of 100 (Routine)
Cuetzalan del Progreso	Mexico	Record low maximum temperature	16.7 C (62.1 F)	23 of 100 (Routine)
Novy-Port	Russia	Record high maximum temperature	7.1 C (44.8 F)	23 of 100 (Routine)
Santa Ana Fire STN	United States	Record high minimum temperature	17.2 C (63.0 F)	23 of 100 (Routine)
Sydenham	Australia	Record daily precipitation	25.1 mm (1.0 in)	22 of 100 (Routine)
Ruoqiang	China	Record low minimum temperature	-4.0 C (24.8 F)	22 of 100 (Routine)
Samtredia	Georgia	Record high minimum temperature	17.9 C (64.2 F)	22 of 100 (Routine)
Nemuro	Japan	Record daily precipitation	43.0 mm (1.7 in)	22 of 100 (Routine)
Chilapa (Dge)	Mexico	Record low minimum temperature	7.8 C (46.0 F)	22 of 100 (Routine)
Puebla (Dge)	Mexico	Record low minimum temperature	4.4 C (39.9 F)	22 of 100 (Routine)

Counts by Type and Timescale

518 records

Records set or tied on 18 October 1987 by type: Highest daily maximum 144, Lowest daily maximum 45, Highest daily minimum 96, Lowest daily minimum 122, Heaviest daily rainfall 107, Heaviest daily snowfall 2, Deepest snow cover 2.

Records on 18 October 1987 by type
Record type	Records
Highest daily maximum	144
Lowest daily maximum	45
Highest daily minimum	96
Lowest daily minimum	122
Heaviest daily rainfall	107
Heaviest daily snowfall	2
Deepest snow cover	2

Records on 18 October 1987 by timescale: all-time 0, monthly 9, daily 509.

How Much Records Were Beaten By

413 broken records

Margins by which the 413 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.0. Ties are not counted.

Top 20 by Significance

18 October 1987

Top 20 records on 18 October 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 October 1987	Swansea Post Office, AU	daily rain	56.8 mm (2.2 in)	43.3 mm (1.7 in)	54 years	66 of 100 (Major)
18 October 1987	Kellevie, AU	daily rain	40.2 mm (1.6 in)	30.0 mm (1.2 in)	73 years	65 of 100 (Major)
18 October 1987	Mombetsu, JP	daily rain	45.5 mm (1.8 in)	35.8 mm (1.4 in)	20 years	48 of 100 (Notable)
18 October 1987	Manati 2 E, PR	daily high min	23.9 C (75.0 F)	1.7 C (3.1 F)	64 years	43 of 100 (Notable)
18 October 1987	Kurilsk, RU	daily rain	64.8 mm (2.6 in)	48.7 mm (1.9 in)	0 years	43 of 100 (Notable)
18 October 1987	Mount Irving, AU	daily rain	46.2 mm (1.8 in)	15.7 mm (0.6 in)	70 years	41 of 100 (Notable)
18 October 1987	Gladstone (Old Post Office), AU	daily rain	26.8 mm (1.1 in)	14.1 mm (0.6 in)	49 years	40 of 100 (Notable)
18 October 1987	Campania (the Pines), AU	daily rain	26.4 mm (1.0 in)	16.2 mm (0.6 in)	36 years	40 of 100 (Notable)
18 October 1987	Humacao 2 SSE, PR	daily rain	80.0 mm (3.1 in)	32.8 mm (1.3 in)	52 years	39 of 100 (Notable)
18 October 1987	Quoiba, AU	monthly rain	62.0 mm (2.4 in)	19.4 mm (0.8 in)	8 years	38 of 100 (Notable)
18 October 1987	Swansea (Kelvedon), AU	monthly rain	57.0 mm (2.2 in)	3.4 mm (0.13 in)	54 years	38 of 100 (Notable)
18 October 1987	Cranbrook (Cranbrook House), AU	daily rain	48.8 mm (1.9 in)	15.0 mm (0.6 in)	36 years	37 of 100 (Notable)
18 October 1987	Zagreb-Gric, HR	daily rain	38.1 mm (1.5 in)	1.8 mm (0.07 in)	88 years	37 of 100 (Notable)
18 October 1987	Aurangabad Chikalth, IN	daily rain	56.9 mm (2.2 in)	33.3 mm (1.3 in)	28 years	36 of 100 (Notable)
18 October 1987	Wattle Hill, AU	daily rain	45.6 mm (1.8 in)	16.4 mm (0.6 in)	36 years	35 of 100 (Notable)
18 October 1987	Mayaguez City, PR	daily high min	23.9 C (75.0 F)	0.6 C (1.1 F)	76 years	35 of 100 (Notable)
18 October 1987	Goodger Store, AU	monthly rain	100.2 mm (3.9 in)	0.6 mm (0.02 in)	62 years	34 of 100 (Routine)
18 October 1987	Maria Island (Darlington), AU	daily rain	31.3 mm (1.2 in)	17.3 mm (0.7 in)	22 years	34 of 100 (Routine)
18 October 1987	Tinaroo Falls Dam, AU	daily rain	27.0 mm (1.1 in)	22.0 mm (0.9 in)	6 years	33 of 100 (Routine)
18 October 1987	El Carmen (Smn), MX	daily low min	16.7 C (62.1 F)	2.2 C (4.0 F)	56 years	33 of 100 (Routine)

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

1794 to 1987

Records set or tied on this calendar date in each year from 1794 to 1987. 1987 had 518 records.

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

Records on 10-18 in each year
Year	Records
1794	1
1796	1
1799	1
1806	1
1807	1
1810	1
1811	2
1817	1
1832	1
1835	1
1836	1
1843	1
1846	2
1848	1
1849	1
1851	1
1852	1
1859	1
1863	1
1865	2
1866	2
1868	1
1869	1
1871	1
1872	1
1874	4
1876	2
1877	2
1879	3
1881	1
1882	1
1883	2
1887	1
1888	1
1890	4
1892	4
1893	1
1894	3
1895	2
1897	6
1898	5
1899	12
1900	5
1901	5
1902	6
1903	9
1904	12
1905	27
1906	17
1907	11
1908	44
1909	23
1910	50
1911	22
1912	12
1913	26
1914	52
1915	12
1916	64
1917	109
1918	24
1919	31
1920	87
1921	87
1922	59
1923	114
1924	151
1925	153
1926	149
1927	309
1928	316
1929	190
1930	507
1931	350
1932	446
1933	264
1934	222
1935	360
1936	483
1937	671
1938	536
1939	475
1940	532
1941	240
1942	332
1943	844
1944	264
1945	398
1946	355
1947	965
1948	1,128
1949	665
1950	996
1951	325
1952	394
1953	678
1954	621
1955	403
1956	578
1957	220
1958	407
1959	246
1960	612
1961	362
1962	252
1963	492
1964	311
1965	1,066
1966	613
1967	405
1968	737
1969	789
1970	501
1971	1,199
1972	1,581
1973	789
1974	746
1975	779
1976	1,326
1977	533
1978	545
1979	555
1980	1,024
1981	680
1982	654
1983	684
1984	1,331
1985	831
1986	344
1987	518
1988	733
1989	1,196
1990	1,043
1991	999
1992	1,295
1993	1,051
1994	1,296
1995	1,227
1996	795
1997	1,240
1998	1,323
1999	773
2000	823
2001	818
2002	878
2003	1,097
2004	1,156
2005	755
2006	1,328
2007	1,298
2008	531
2009	1,546
2010	634
2011	736
2012	741
2013	430
2014	690
2015	915
2016	1,511
2017	590
2018	759
2019	346
2020	957
2021	387
2022	1,334
2023	693
2024	1,142
2025	367

Download the Data

Data for records on 1987-10-18: 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	374
10 to 20	22
20 to 30	8
30 to 40	6
40 to 50	2
50 to 60	0
60 to 70	0
70 to 80	1