Weather Records on 18 May 1986

1,131 weather records were set or tied worldwide on 18 May 1986. Highest significance: Boobyalla, AU.

Key Facts for 18 May 1986

On 18 May 1986, 1,131 weather records were set or tied at long-record stations worldwide.
452 were record highs and 302 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 24 monthly and 1,106 daily.
Boobyalla set a daily record precipitation of 76.2 mm (3.0 in) on 18 May 1986.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 438 records.

Record Map

1,131 stations

1,131 station records on 18 May 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Boobyalla	Australia	Record daily precipitation	76.2 mm (3.0 in)	76 of 100 (Major)
Lake Leake (Elizabeth River)	Australia	Record daily precipitation	67.4 mm (2.7 in)	70 of 100 (Major)
Lenah Valley (Augusta Road)	Australia	Record daily precipitation	52.8 mm (2.1 in)	70 of 100 (Major)
Lunawanna	Australia	Record daily precipitation	108.2 mm (4.3 in)	69 of 100 (Major)
Buckland (Brockley)	Australia	Record daily precipitation	81.6 mm (3.2 in)	68 of 100 (Major)
Carroll (the Ranch)	Australia	Record daily precipitation	48.0 mm (1.9 in)	64 of 100 (Major)
St Helens Post Office	Australia	Record daily precipitation	109.0 mm (4.3 in)	63 of 100 (Major)
Miena Dam	Australia	Record daily precipitation	35.0 mm (1.4 in)	62 of 100 (Major)
Elgin Water	United States	Record daily precipitation	57.9 mm (2.3 in)	62 of 100 (Major)
Paw Paw 2S	United States	Record daily precipitation	66.0 mm (2.6 in)	62 of 100 (Major)
Swan Island Lighthouse	Australia	Record daily precipitation	37.0 mm (1.5 in)	61 of 100 (Major)
Bellerive (Fort Street)	Australia	Record daily precipitation	29.4 mm (1.2 in)	61 of 100 (Major)
Somerton (Bective Estate)	Australia	Record daily precipitation	43.0 mm (1.7 in)	60 of 100 (Major)
Apslawn	Australia	Record daily precipitation	82.0 mm (3.2 in)	60 of 100 (Major)
Bagdad Post Office	Australia	Record daily precipitation	41.0 mm (1.6 in)	59 of 100 (Notable)
Tamga-In-Kirgiz	Kyrgyzstan	Record daily precipitation	29.9 mm (1.2 in)	59 of 100 (Notable)
Poljarnoe	Russia	Record daily precipitation	29.0 mm (1.1 in)	58 of 100 (Notable)
Bridport Post Office	Australia	Record daily precipitation	41.8 mm (1.6 in)	55 of 100 (Notable)
Derby Post Office	Australia	Record daily precipitation	63.0 mm (2.5 in)	55 of 100 (Notable)
Eddystone Point	Australia	Record daily precipitation	64.1 mm (2.5 in)	54 of 100 (Notable)
Kegen	Kazakhstan	Record daily precipitation	28.6 mm (1.1 in)	54 of 100 (Notable)
Fingal (Legge Street)	Australia	Record daily precipitation	53.0 mm (2.1 in)	52 of 100 (Notable)
Przhevalsk	Kyrgyzstan	Record daily precipitation	36.7 mm (1.4 in)	52 of 100 (Notable)
Bicheno (Council Depot)	Australia	Record daily precipitation	60.0 mm (2.4 in)	51 of 100 (Notable)
Cranbrook (Cranbrook House)	Australia	Record daily precipitation	60.0 mm (2.4 in)	51 of 100 (Notable)
Marlin	United States	Record low maximum temperature	18.3 C (64.9 F)	51 of 100 (Notable)
Onward	United States	Record daily precipitation	106.7 mm (4.2 in)	48 of 100 (Notable)
Whiting Fld NAS	United States	Record daily precipitation	114.3 mm (4.5 in)	48 of 100 (Notable)
Jericho (Northumbria)	Australia	Record daily precipitation	30.0 mm (1.2 in)	47 of 100 (Notable)
Flinders Island Airport	Australia	Record daily precipitation	43.8 mm (1.7 in)	46 of 100 (Notable)
Eaglehawk Neck (Jetty Road)	Australia	Record daily precipitation	33.2 mm (1.3 in)	45 of 100 (Notable)
Mangalore (Milford)	Australia	Record daily precipitation	50.8 mm (2.0 in)	45 of 100 (Notable)
Moorina (Frome Dam)	Australia	Record daily precipitation	107.2 mm (4.2 in)	44 of 100 (Notable)
Matias Romero (Smn)	Mexico	Record high minimum temperature	28.3 C (82.9 F)	44 of 100 (Notable)
Mena	United States	Record low maximum temperature	17.8 C (64.0 F)	44 of 100 (Notable)
Lake City Exp Farm	United States	Record daily precipitation	30.2 mm (1.2 in)	44 of 100 (Notable)
Tamworth Airport	Australia	Record daily precipitation	28.0 mm (1.1 in)	43 of 100 (Notable)
Kelvin (Kahana)	Australia	Record daily precipitation	31.0 mm (1.2 in)	43 of 100 (Notable)
Kelvin (Carellan)	Australia	Record daily precipitation	28.0 mm (1.1 in)	43 of 100 (Notable)
Hobart Botanical Gardens	Australia	Record daily precipitation	28.8 mm (1.1 in)	43 of 100 (Notable)
Detour Village	United States	Record daily precipitation	36.1 mm (1.4 in)	43 of 100 (Notable)
Abercrombie (Abercrombie Bridg	Australia	Record daily precipitation	44.0 mm (1.7 in)	42 of 100 (Notable)
Kellevie	Australia	Record daily precipitation	52.6 mm (2.1 in)	42 of 100 (Notable)
Anyang	China	Record daily precipitation	46.7 mm (1.8 in)	42 of 100 (Notable)
Jordan Dam	United States	Record daily precipitation	76.2 mm (3.0 in)	42 of 100 (Notable)
Riversul	Brazil	Record daily precipitation	52.8 mm (2.1 in)	41 of 100 (Notable)
Freiburg	Germany	Record high minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Mt Ida 3 SE	United States	Record low maximum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Dixon Wwtp	United States	Record daily precipitation	38.6 mm (1.5 in)	41 of 100 (Notable)
Durant	United States	Record low minimum temperature	2.2 C (36.0 F)	41 of 100 (Notable)
St Marys (Cullenswood)	Australia	Record daily precipitation	51.0 mm (2.0 in)	40 of 100 (Notable)
Hobart (Ellerslie Road)	Australia	Record daily precipitation	26.2 mm (1.0 in)	40 of 100 (Notable)
Rokeby (the Mall)	Australia	Record daily precipitation	29.0 mm (1.1 in)	40 of 100 (Notable)
Wheaton 3 SE	United States	Record daily precipitation	49.5 mm (1.9 in)	40 of 100 (Notable)
Pecos	United States	Record low minimum temperature	3.9 C (39.0 F)	40 of 100 (Notable)
Asheville	United States	Record high minimum temperature	17.2 C (63.0 F)	40 of 100 (Notable)
Boggabri (Milchengowrie)	Australia	Record daily precipitation	31.6 mm (1.2 in)	39 of 100 (Notable)
Tuena (Wyoming)	Australia	Record daily precipitation	27.2 mm (1.1 in)	39 of 100 (Notable)
Zharkent	Kazakhstan	Record daily precipitation	34.3 mm (1.4 in)	39 of 100 (Notable)
Selma	United States	Record daily precipitation	62.5 mm (2.5 in)	39 of 100 (Notable)

Counts by Type and Timescale

1,131 records

Records set or tied on 18 May 1986 by type: Highest daily maximum 136, Lowest daily maximum 140, Highest daily minimum 316, Lowest daily minimum 162, Heaviest daily rainfall 377.

Records on 18 May 1986 by type
Record type	Records
Highest daily maximum	136
Lowest daily maximum	140
Highest daily minimum	316
Lowest daily minimum	162
Heaviest daily rainfall	377
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 May 1986 by timescale: all-time 1, monthly 24, daily 1,106.

How Much Records Were Beaten By

930 broken records

Margins by which the 930 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 74.7. Ties are not counted.

Top 20 by Significance

18 May 1986

Top 20 records on 18 May 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1986	Boobyalla, AU	daily rain	76.2 mm (3.0 in)	49.3 mm (1.9 in)	87 years	76 of 100 (Major)
18 May 1986	Lake Leake (Elizabeth River), AU	daily rain	67.4 mm (2.7 in)	49.4 mm (1.9 in)	71 years	70 of 100 (Major)
18 May 1986	Lenah Valley (Augusta Road), AU	daily rain	52.8 mm (2.1 in)	35.0 mm (1.4 in)	71 years	70 of 100 (Major)
18 May 1986	Lunawanna, AU	monthly rain	108.2 mm (4.3 in)	61.0 mm (2.4 in)	38 years	69 of 100 (Major)
18 May 1986	Buckland (Brockley), AU	daily rain	81.6 mm (3.2 in)	43.0 mm (1.7 in)	71 years	68 of 100 (Major)
18 May 1986	Carroll (the Ranch), AU	daily rain	48.0 mm (1.9 in)	24.4 mm (1.0 in)	93 years	64 of 100 (Major)
18 May 1986	St Helens Post Office, AU	monthly rain	109.0 mm (4.3 in)	22.6 mm (0.9 in)	61 years	63 of 100 (Major)
18 May 1986	Miena Dam, AU	daily rain	35.0 mm (1.4 in)	19.0 mm (0.7 in)	69 years	62 of 100 (Major)
18 May 1986	Elgin Water, US	daily rain	57.9 mm (2.3 in)	38.1 mm (1.5 in)	64 years	62 of 100 (Major)
18 May 1986	Paw Paw 2S, US	daily rain	66.0 mm (2.6 in)	39.8 mm (1.6 in)	60 years	62 of 100 (Major)
18 May 1986	Swan Island Lighthouse, AU	daily rain	37.0 mm (1.5 in)	22.3 mm (0.9 in)	61 years	61 of 100 (Major)
18 May 1986	Bellerive (Fort Street), AU	daily rain	29.4 mm (1.2 in)	15.4 mm (0.6 in)	71 years	61 of 100 (Major)
18 May 1986	Somerton (Bective Estate), AU	daily rain	43.0 mm (1.7 in)	23.2 mm (0.9 in)	93 years	60 of 100 (Major)
18 May 1986	Apslawn, AU	daily rain	82.0 mm (3.2 in)	55.8 mm (2.2 in)	45 years	60 of 100 (Major)
18 May 1986	Bagdad Post Office, AU	daily rain	41.0 mm (1.6 in)	26.8 mm (1.1 in)	45 years	59 of 100 (Notable)
18 May 1986	Tamga-In-Kirgiz, KG	daily rain	29.9 mm (1.2 in)	22.5 mm (0.9 in)	47 years	59 of 100 (Notable)
18 May 1986	Poljarnoe, RU	monthly rain	29.0 mm (1.1 in)	8.0 mm (0.31 in)	38 years	58 of 100 (Notable)
18 May 1986	Bridport Post Office, AU	daily rain	41.8 mm (1.6 in)	24.0 mm (0.9 in)	55 years	55 of 100 (Notable)
18 May 1986	Derby Post Office, AU	daily rain	63.0 mm (2.5 in)	42.4 mm (1.7 in)	44 years	55 of 100 (Notable)
18 May 1986	Eddystone Point, AU	daily rain	64.1 mm (2.5 in)	52.4 mm (2.1 in)	24 years	54 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 1986

Records set or tied on this calendar date in each year from 1796 to 1986. 1986 had 1,131 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 1986-05-18: 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	789
10 to 20	82
20 to 30	31
30 to 40	16
40 to 50	6
50 to 60	3
60 to 70	2
70 to 80	1