Weather Records on 20 October 1987

590 weather records were set or tied worldwide on 20 October 1987. Highest significance: Dublin Phoenix Park, IE.

Key Facts for 20 October 1987

On 20 October 1987, 590 weather records were set or tied at long-record stations worldwide.
185 were record highs and 214 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 579 daily.
Dublin Phoenix Park set a daily record precipitation of 42.7 mm (1.7 in) on 20 October 1987.
Across 160 earlier years (1806 to 2025) the same calendar date averaged 456 records.

Record Map

590 stations

590 station records on 20 October 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 October 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dublin Phoenix Park	Ireland	Record daily precipitation	42.7 mm (1.7 in)	72 of 100 (Major)
Raymond Terrace (Kinross)	Australia	Record daily precipitation	74.8 mm (2.9 in)	63 of 100 (Major)
Penrith Ladbury Avenue	Australia	Record daily precipitation	53.6 mm (2.1 in)	63 of 100 (Major)
Ft Yukon	United States	Record daily precipitation	25.4 mm (1.0 in)	61 of 100 (Major)
Appin Church St	Australia	Record daily precipitation	82.8 mm (3.3 in)	54 of 100 (Notable)
Im. Poliny Osipenko	Russia	Record daily precipitation	28.2 mm (1.1 in)	52 of 100 (Notable)
Armagh	United Kingdom	Record daily precipitation	29.2 mm (1.1 in)	52 of 100 (Notable)
Jerrys Plains Post Office	Australia	Record daily precipitation	50.0 mm (2.0 in)	47 of 100 (Notable)
Richmond - Uws Hawkesbury	Australia	Record daily precipitation	94.8 mm (3.7 in)	46 of 100 (Notable)
Woonona (Popes Rd)	Australia	Record daily precipitation	176.4 mm (6.9 in)	46 of 100 (Notable)
Lithgow (Birdwood St)	Australia	Record daily precipitation	43.0 mm (1.7 in)	43 of 100 (Notable)
Cessnock Post Office	Australia	Record daily precipitation	59.8 mm (2.4 in)	42 of 100 (Notable)
Williamtown Raaf	Australia	Record daily precipitation	56.2 mm (2.2 in)	42 of 100 (Notable)
Rothamsted	United Kingdom	Record daily precipitation	41.7 mm (1.6 in)	42 of 100 (Notable)
Selby	United States	Record daily snowfall	5.1 cm (2.0 in)	42 of 100 (Notable)
Gauhati	India	Record daily precipitation	127.0 mm (5.0 in)	40 of 100 (Notable)
Wisemans Ferry (Old Po)	Australia	Record daily precipitation	50.0 mm (2.0 in)	39 of 100 (Notable)
Gorakhpur	India	Record daily precipitation	87.1 mm (3.4 in)	39 of 100 (Notable)
Burukan	Russia	Record daily precipitation	36.9 mm (1.5 in)	39 of 100 (Notable)
Caen-Carpiquet	France	Record daily precipitation	30.3 mm (1.2 in)	38 of 100 (Notable)
Bermagui South (Young Street)	Australia	Record daily precipitation	70.0 mm (2.8 in)	37 of 100 (Notable)
Tathra Post Office	Australia	Record daily precipitation	51.4 mm (2.0 in)	36 of 100 (Notable)
Nevada City	United States	Record high minimum temperature	10.6 C (51.1 F)	36 of 100 (Notable)
Kiama Bowling Club	Australia	Record daily precipitation	45.5 mm (1.8 in)	35 of 100 (Notable)
Castlereagh (Castlereagh Road)	Australia	Record daily precipitation	44.4 mm (1.7 in)	34 of 100 (Routine)
Verkeerdevlei (Pol)	South Africa	Record daily precipitation	50.0 mm (2.0 in)	34 of 100 (Routine)
Wisley	United Kingdom	Record daily precipitation	35.4 mm (1.4 in)	34 of 100 (Routine)
Thomasville 7 NE	United States	Record high maximum temperature	33.3 C (91.9 F)	34 of 100 (Routine)
Covington 3 SW	United States	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Jackson	United States	Record low minimum temperature	-16.1 C (3.0 F)	34 of 100 (Routine)
Forster - Tuncurry R.V.C.P.	Australia	Record daily precipitation	42.0 mm (1.7 in)	33 of 100 (Routine)
Sonnblick	Austria	Record high maximum temperature	6.5 C (43.7 F)	33 of 100 (Routine)
Bolivar 1 NE	United States	Record low minimum temperature	-7.8 C (18.0 F)	33 of 100 (Routine)
Mount Victoria (Mt Victoria (S	Australia	Record daily precipitation	52.4 mm (2.1 in)	31 of 100 (Routine)
Cataract Dam	Australia	Record daily precipitation	85.0 mm (3.3 in)	31 of 100 (Routine)
Milesville 5 NE	United States	Record low minimum temperature	-6.7 C (19.9 F)	31 of 100 (Routine)
Santo Anastacio	Brazil	Record daily precipitation	47.5 mm (1.9 in)	30 of 100 (Routine)
Nikolskoye/Beringa Ostrov	Russia	Record low maximum temperature	2.7 C (36.9 F)	30 of 100 (Routine)
Ashland	United States	Record high maximum temperature	28.3 C (82.9 F)	30 of 100 (Routine)
Grapeview 3 SW	United States	Record high maximum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Richmond Raaf	Australia	Record daily precipitation	57.6 mm (2.3 in)	29 of 100 (Routine)
Wildes Meadow (Longview)	Australia	Record daily precipitation	99.0 mm (3.9 in)	29 of 100 (Routine)
Katoomba (Murri St)	Australia	Record daily precipitation	81.0 mm (3.2 in)	28 of 100 (Routine)
Kassler	United States	Record low minimum temperature	-6.7 C (19.9 F)	28 of 100 (Routine)
Kanalohuluhulu 1075	United States	Record low maximum temperature	17.2 C (63.0 F)	28 of 100 (Routine)
Ipswich	Australia	Record daily precipitation	35.4 mm (1.4 in)	27 of 100 (Routine)
Morpeth Post Office	Australia	Record daily precipitation	57.0 mm (2.2 in)	27 of 100 (Routine)
Wapengo Lake Road	Australia	Record daily precipitation	50.0 mm (2.0 in)	27 of 100 (Routine)
El Carmen (Smn)	Mexico	Record low minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Humacao 2 SSE	Puerto Rico [United States]	Record low maximum temperature	26.7 C (80.1 F)	27 of 100 (Routine)
Tidewater	United States	Record high maximum temperature	27.2 C (81.0 F)	27 of 100 (Routine)
Santo Domingo	Mexico	Record low minimum temperature	10.6 C (51.1 F)	26 of 100 (Routine)
Vega de Alatorre	Mexico	Record low minimum temperature	10.6 C (51.1 F)	26 of 100 (Routine)
Seeley Lake Rs	United States	Record low minimum temperature	-11.1 C (12.0 F)	26 of 100 (Routine)
Kainaliu 73.2	United States	Record high maximum temperature	30.0 C (86.0 F)	26 of 100 (Routine)
La Quiaca Observato	Argentina	Record low maximum temperature	12.4 C (54.3 F)	25 of 100 (Routine)
Yibin	China	Record low maximum temperature	13.5 C (56.3 F)	25 of 100 (Routine)
Broadus	United States	Record low minimum temperature	-11.1 C (12.0 F)	25 of 100 (Routine)
Corvallis State UNIV	United States	Record high maximum temperature	25.6 C (78.1 F)	25 of 100 (Routine)
Couderay 7 W	United States	Record daily snowfall	5.1 cm (2.0 in)	25 of 100 (Routine)

Counts by Type and Timescale

590 records

Records set or tied on 20 October 1987 by type: Highest daily maximum 118, Lowest daily maximum 86, Highest daily minimum 67, Lowest daily minimum 128, Heaviest daily rainfall 159, Heaviest daily snowfall 21, Deepest snow cover 11.

Records on 20 October 1987 by type
Record type	Records
Highest daily maximum	118
Lowest daily maximum	86
Highest daily minimum	67
Lowest daily minimum	128
Heaviest daily rainfall	159
Heaviest daily snowfall	21
Deepest snow cover	11

Records on 20 October 1987 by timescale: all-time 0, monthly 11, daily 579.

How Much Records Were Beaten By

464 broken records

Margins by which the 464 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.1. Ties are not counted.

Top 20 by Significance

20 October 1987

Top 20 records on 20 October 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 October 1987	Dublin Phoenix Park, IE	daily rain	42.7 mm (1.7 in)	30.8 mm (1.2 in)	76 years	72 of 100 (Major)
20 October 1987	Raymond Terrace (Kinross), AU	daily rain	74.8 mm (2.9 in)	32.6 mm (1.3 in)	92 years	63 of 100 (Major)
20 October 1987	Penrith Ladbury Avenue, AU	daily rain	53.6 mm (2.1 in)	34.8 mm (1.4 in)	84 years	63 of 100 (Major)
20 October 1987	Ft Yukon, US	monthly rain	25.4 mm (1.0 in)	5.1 mm (0.20 in)	88 years	61 of 100 (Major)
20 October 1987	Appin Church St, AU	daily rain	82.8 mm (3.3 in)	59.9 mm (2.4 in)	20 years	54 of 100 (Notable)
20 October 1987	Im. Poliny Osipenko, RU	daily rain	28.2 mm (1.1 in)	21.1 mm (0.8 in)	38 years	52 of 100 (Notable)
20 October 1987	Armagh, GB	daily rain	29.2 mm (1.1 in)	6.8 mm (0.27 in)	124 years	52 of 100 (Notable)
20 October 1987	Jerrys Plains Post Office, AU	daily rain	50.0 mm (2.0 in)	26.9 mm (1.1 in)	24 years	47 of 100 (Notable)
20 October 1987	Richmond - Uws Hawkesbury, AU	monthly rain	94.8 mm (3.7 in)	16.8 mm (0.7 in)	32 years	46 of 100 (Notable)
20 October 1987	Woonona (Popes Rd), AU	monthly rain	176.4 mm (6.9 in)	46.4 mm (1.8 in)	4 years	46 of 100 (Notable)
20 October 1987	Lithgow (Birdwood St), AU	daily rain	43.0 mm (1.7 in)	8.7 mm (0.34 in)	84 years	43 of 100 (Notable)
20 October 1987	Cessnock Post Office, AU	daily rain	59.8 mm (2.4 in)	37.8 mm (1.5 in)	5 years	42 of 100 (Notable)
20 October 1987	Williamtown Raaf, AU	daily rain	56.2 mm (2.2 in)	32.8 mm (1.3 in)	20 years	42 of 100 (Notable)
20 October 1987	Rothamsted, GB	daily rain	41.7 mm (1.6 in)	11.5 mm (0.5 in)	44 years	42 of 100 (Notable)
20 October 1987	Selby, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	80 years	42 of 100 (Notable)
20 October 1987	Gauhati, IN	monthly rain	127.0 mm (5.0 in)	38.1 mm (1.5 in)	1 year	40 of 100 (Notable)
20 October 1987	Wisemans Ferry (Old Po), AU	daily rain	50.0 mm (2.0 in)	8.6 mm (0.34 in)	84 years	39 of 100 (Notable)
20 October 1987	Gorakhpur, IN	daily rain	87.1 mm (3.4 in)	65.1 mm (2.6 in)	28 years	39 of 100 (Notable)
20 October 1987	Burukan, RU	daily rain	36.9 mm (1.5 in)	23.2 mm (0.9 in)	28 years	39 of 100 (Notable)
20 October 1987	Caen-Carpiquet, FR	daily rain	30.3 mm (1.2 in)	16.5 mm (0.6 in)	32 years	38 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

1806 to 1987

Records set or tied on this calendar date in each year from 1806 to 1987. 1987 had 590 records.

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

Records on 10-20 in each year
Year	Records
1806	1
1835	1
1844	1
1846	1
1847	2
1851	1
1852	1
1858	1
1863	2
1864	2
1866	3
1867	1
1868	2
1872	2
1874	2
1875	3
1876	2
1877	1
1878	1
1880	3
1881	2
1884	1
1885	1
1886	1
1887	1
1888	6
1891	4
1892	4
1893	1
1894	3
1895	4
1896	9
1897	2
1898	7
1899	1
1900	8
1901	7
1902	5
1903	9
1904	13
1905	22
1906	28
1907	32
1908	26
1909	17
1910	31
1911	16
1912	6
1913	38
1914	16
1915	20
1916	72
1917	201
1918	34
1919	19
1920	81
1921	68
1922	83
1923	96
1924	182
1925	247
1926	147
1927	283
1928	92
1929	129
1930	672
1931	125
1932	331
1933	675
1934	422
1935	390
1936	370
1937	189
1938	231
1939	367
1940	757
1941	459
1942	152
1943	501
1944	288
1945	363
1946	310
1947	1,494
1948	320
1949	1,084
1950	619
1951	279
1952	520
1953	1,057
1954	262
1955	529
1956	283
1957	440
1958	461
1959	451
1960	671
1961	479
1962	733
1963	765
1964	598
1965	340
1966	857
1967	511
1968	244
1969	607
1970	710
1971	606
1972	1,724
1973	878
1974	1,122
1975	587
1976	1,304
1977	467
1978	508
1979	1,647
1980	350
1981	1,083
1982	1,191
1983	944
1984	1,562
1985	835
1986	823
1987	590
1988	737
1989	2,092
1990	609
1991	971
1992	1,174
1993	1,238
1994	650
1995	703
1996	1,417
1997	949
1998	683
1999	603
2000	737
2001	589
2002	985
2003	1,761
2004	1,861
2005	1,092
2006	1,170
2007	923
2008	477
2009	786
2010	539
2011	785
2012	945
2013	592
2014	851
2015	523
2016	947
2017	602
2018	394
2019	744
2020	1,010
2021	900
2022	834
2023	1,468
2024	707
2025	326

Download the Data

Data for records on 1987-10-20: 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	383
10 to 20	36
20 to 30	24
30 to 40	10
40 to 50	3
50 to 60	7
60 to 70	1