Weather Records on 18 August 1986

861 weather records were set or tied worldwide on 18 August 1986. Highest significance: Newberry, US.

Key Facts for 18 August 1986

On 18 August 1986, 861 weather records were set or tied at long-record stations worldwide.
434 were record highs and 148 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 15 monthly and 841 daily.
Newberry set an all-time record daily precipitation of 264.7 mm (10.4 in) on 18 August 1986.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 438 records.

Record Map

861 stations

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

Weather records on 18 August 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Newberry	United States	Record daily precipitation	264.7 mm (10.4 in)	86 of 100 (Exceptional)
Raglan	Australia	Record daily precipitation	38.0 mm (1.5 in)	58 of 100 (Notable)
Karlsruhe	Germany	Record daily precipitation	66.4 mm (2.6 in)	56 of 100 (Notable)
Cornwall	United States	Record daily precipitation	119.4 mm (4.7 in)	56 of 100 (Notable)
Fairymead Sugar Mill	Australia	Record daily precipitation	44.2 mm (1.7 in)	52 of 100 (Notable)
Lautertal-Oberlauter	Germany	Record daily precipitation	36.6 mm (1.4 in)	51 of 100 (Notable)
Koerich	Luxembourg	Record daily precipitation	40.8 mm (1.6 in)	51 of 100 (Notable)
Bundaberg Post Office	Australia	Record daily precipitation	37.4 mm (1.5 in)	50 of 100 (Notable)
Woomargama Estate	Australia	Record daily precipitation	53.0 mm (2.1 in)	50 of 100 (Notable)
Lichtentanne	Germany	Record daily precipitation	31.6 mm (1.2 in)	50 of 100 (Notable)
Calmus	Luxembourg	Record daily precipitation	40.8 mm (1.6 in)	49 of 100 (Notable)
N Is NAS	United States	Record high maximum temperature	33.9 C (93.0 F)	49 of 100 (Notable)
Bajool Post Office	Australia	Record daily precipitation	73.0 mm (2.9 in)	47 of 100 (Notable)
Burnett Heads Niell St	Australia	Record daily precipitation	43.0 mm (1.7 in)	46 of 100 (Notable)
Kalpowar Forestry	Australia	Record daily precipitation	60.0 mm (2.4 in)	46 of 100 (Notable)
Imbil Post Office	Australia	Record daily precipitation	43.2 mm (1.7 in)	45 of 100 (Notable)
Merklingen	Germany	Record daily precipitation	46.7 mm (1.8 in)	45 of 100 (Notable)
Sandy Cape Lighthouse	Australia	Record daily precipitation	38.4 mm (1.5 in)	44 of 100 (Notable)
Greiz-Dolau	Germany	Record daily precipitation	33.5 mm (1.3 in)	44 of 100 (Notable)
Cuernavaca (Dge)	Mexico	Record low minimum temperature	11.7 C (53.1 F)	44 of 100 (Notable)
Walden	United States	Record high maximum temperature	32.2 C (90.0 F)	44 of 100 (Notable)
Split Rock Pond	United States	Record daily precipitation	83.8 mm (3.3 in)	44 of 100 (Notable)
West Hickory River	United States	Record daily precipitation	60.5 mm (2.4 in)	44 of 100 (Notable)
Corinne	United States	Record high minimum temperature	22.2 C (72.0 F)	44 of 100 (Notable)
Ajan	Russia	Record daily precipitation	104.1 mm (4.1 in)	43 of 100 (Notable)
Central City	United States	Record daily precipitation	61.7 mm (2.4 in)	43 of 100 (Notable)
Waterloo	Australia	Record daily precipitation	31.0 mm (1.2 in)	42 of 100 (Notable)
Maryborough	Australia	Record daily precipitation	26.0 mm (1.0 in)	42 of 100 (Notable)
Tombstone	United States	Record daily precipitation	39.4 mm (1.6 in)	42 of 100 (Notable)
Winnsboro	United States	Record daily precipitation	114.3 mm (4.5 in)	42 of 100 (Notable)
Ubobo Store	Australia	Record daily precipitation	32.2 mm (1.3 in)	41 of 100 (Notable)
Winfield	Australia	Record daily precipitation	41.0 mm (1.6 in)	41 of 100 (Notable)
Caloundra Signal Station	Australia	Record daily precipitation	44.0 mm (1.7 in)	41 of 100 (Notable)
Bad Konigshofen	Germany	Record daily precipitation	38.0 mm (1.5 in)	41 of 100 (Notable)
Oestersund-Froesoen	Sweden	Record low maximum temperature	9.7 C (49.5 F)	41 of 100 (Notable)
Bargara	Australia	Record daily precipitation	40.0 mm (1.6 in)	40 of 100 (Notable)
Ringwood	United States	Record daily precipitation	72.1 mm (2.8 in)	40 of 100 (Notable)
Dulce	United States	Record high minimum temperature	17.2 C (63.0 F)	40 of 100 (Notable)
Ferron	United States	Record high maximum temperature	35.6 C (96.1 F)	40 of 100 (Notable)
Yaamba	Australia	Record daily precipitation	25.0 mm (1.0 in)	39 of 100 (Notable)
Marshall	United States	Record daily precipitation	68.3 mm (2.7 in)	39 of 100 (Notable)
Cape Capricorn Lighthouse	Australia	Record daily precipitation	26.2 mm (1.0 in)	38 of 100 (Notable)
Malakoff	Australia	Record daily precipitation	27.0 mm (1.1 in)	38 of 100 (Notable)
Strasbourg-Entzheim	France	Record daily precipitation	56.6 mm (2.2 in)	38 of 100 (Notable)
Chula Vista	United States	Record high maximum temperature	32.2 C (90.0 F)	38 of 100 (Notable)
Norfolk 2 SW	United States	Record daily precipitation	74.9 mm (2.9 in)	38 of 100 (Notable)
N Lazy H Rch	United States	Record daily precipitation	42.7 mm (1.7 in)	37 of 100 (Notable)
Snow Hill 4 N	United States	Record daily precipitation	59.7 mm (2.4 in)	37 of 100 (Notable)
Tully Lake	United States	Record daily precipitation	47.0 mm (1.9 in)	37 of 100 (Notable)
Aztec Ruins Nm	United States	Record high maximum temperature	36.1 C (97.0 F)	37 of 100 (Notable)
Little Mtn	United States	Record daily precipitation	164.1 mm (6.5 in)	37 of 100 (Notable)
Mingela Post Office	Australia	Record daily precipitation	28.8 mm (1.1 in)	36 of 100 (Notable)
N Creek 5 SE	United States	Record daily precipitation	27.9 mm (1.1 in)	36 of 100 (Notable)
Marlinton	United States	Record high minimum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Kemmerer 2N	United States	Record high maximum temperature	32.2 C (90.0 F)	36 of 100 (Notable)
Danevang 1 W	United States	Record high maximum temperature	38.9 C (102.0 F)	35 of 100 (Notable)
Logan	United States	Record low maximum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Byfield Childs Road	Australia	Record daily precipitation	35.0 mm (1.4 in)	34 of 100 (Routine)
Helsinki Kaisaniemi AWS	Finland	Record daily precipitation	25.9 mm (1.0 in)	34 of 100 (Routine)
Belvaux	Luxembourg	Record daily precipitation	26.1 mm (1.0 in)	34 of 100 (Routine)

Counts by Type and Timescale

861 records

Records set or tied on 18 August 1986 by type: Highest daily maximum 267, Lowest daily maximum 76, Highest daily minimum 167, Lowest daily minimum 72, Heaviest daily rainfall 279.

Records on 18 August 1986 by type
Record type	Records
Highest daily maximum	267
Lowest daily maximum	76
Highest daily minimum	167
Lowest daily minimum	72
Heaviest daily rainfall	279
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 1986 by timescale: all-time 5, monthly 15, daily 841.

How Much Records Were Beaten By

638 broken records

Margins by which the 638 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.7. Ties are not counted.

Top 20 by Significance

18 August 1986

Top 20 records on 18 August 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1986	Newberry, US	all-time rain	264.7 mm (10.4 in)	76.7 mm (3.0 in)	56 years	86 of 100 (Exceptional)
18 August 1986	Raglan, AU	daily rain	38.0 mm (1.5 in)	35.5 mm (1.4 in)	52 years	58 of 100 (Notable)
18 August 1986	Karlsruhe, DE	daily rain	66.4 mm (2.6 in)	44.2 mm (1.7 in)	23 years	56 of 100 (Notable)
18 August 1986	Cornwall, US	all-time rain	119.4 mm (4.7 in)	25.7 mm (1.0 in)	14 years	56 of 100 (Notable)
18 August 1986	Fairymead Sugar Mill, AU	daily rain	44.2 mm (1.7 in)	35.1 mm (1.4 in)	32 years	52 of 100 (Notable)
18 August 1986	Lautertal-Oberlauter, DE	daily rain	36.6 mm (1.4 in)	23.9 mm (0.9 in)	32 years	51 of 100 (Notable)
18 August 1986	Koerich, LU	daily rain	40.8 mm (1.6 in)	22.7 mm (0.9 in)	32 years	51 of 100 (Notable)
18 August 1986	Bundaberg Post Office, AU	daily rain	37.4 mm (1.5 in)	14.5 mm (0.6 in)	93 years	50 of 100 (Notable)
18 August 1986	Woomargama Estate, AU	daily rain	53.0 mm (2.1 in)	37.0 mm (1.5 in)	3 years	50 of 100 (Notable)
18 August 1986	Lichtentanne, DE	daily rain	31.6 mm (1.2 in)	10.2 mm (0.4 in)	97 years	50 of 100 (Notable)
18 August 1986	Calmus, LU	daily rain	40.8 mm (1.6 in)	28.8 mm (1.1 in)	21 years	49 of 100 (Notable)
18 August 1986	N Is NAS, US	daily high max	33.9 C (93.0 F)	7.8 C (14.0 F)	28 years	49 of 100 (Notable)
18 August 1986	Bajool Post Office, AU	daily rain	73.0 mm (2.9 in)	58.0 mm (2.3 in)	3 years	47 of 100 (Notable)
18 August 1986	Burnett Heads Niell St, AU	daily rain	43.0 mm (1.7 in)	34.4 mm (1.4 in)	32 years	46 of 100 (Notable)
18 August 1986	Kalpowar Forestry, AU	monthly rain	60.0 mm (2.4 in)	17.8 mm (0.7 in)	21 years	46 of 100 (Notable)
18 August 1986	Imbil Post Office, AU	daily rain	43.2 mm (1.7 in)	21.4 mm (0.8 in)	56 years	45 of 100 (Notable)
18 August 1986	Merklingen, DE	daily rain	46.7 mm (1.8 in)	33.3 mm (1.3 in)	7 years	45 of 100 (Notable)
18 August 1986	Sandy Cape Lighthouse, AU	daily rain	38.4 mm (1.5 in)	17.1 mm (0.7 in)	64 years	44 of 100 (Notable)
18 August 1986	Greiz-Dolau, DE	daily rain	33.5 mm (1.3 in)	15.6 mm (0.6 in)	47 years	44 of 100 (Notable)
18 August 1986	Cuernavaca (Dge), MX	daily low min	11.7 C (53.1 F)	3.3 C (5.9 F)	31 years	44 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

1797 to 1986

Records set or tied on this calendar date in each year from 1797 to 1986. 1986 had 861 records.

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

Records on 08-18 in each year
Year	Records
1797	2
1805	1
1816	1
1827	1
1829	1
1830	1
1833	1
1841	1
1844	1
1845	3
1846	1
1847	1
1849	1
1851	1
1852	1
1853	1
1854	2
1855	1
1856	1
1861	1
1864	2
1866	1
1868	2
1869	1
1870	2
1872	1
1873	1
1875	3
1876	1
1878	1
1879	2
1883	3
1885	3
1886	3
1887	3
1888	2
1889	1
1890	1
1891	2
1892	6
1893	4
1894	4
1895	1
1898	4
1899	6
1900	2
1901	10
1902	8
1903	6
1904	8
1905	10
1906	40
1907	7
1908	21
1909	24
1910	16
1911	11
1912	21
1913	43
1914	37
1915	60
1916	71
1917	70
1918	53
1919	34
1920	51
1921	39
1922	129
1923	90
1924	225
1925	300
1926	168
1927	269
1928	141
1929	181
1930	150
1931	241
1932	382
1933	431
1934	638
1935	424
1936	766
1937	308
1938	243
1939	381
1940	434
1941	467
1942	333
1943	738
1944	325
1945	400
1946	416
1947	958
1948	315
1949	393
1950	683
1951	355
1952	405
1953	323
1954	622
1955	795
1956	580
1957	380
1958	580
1959	537
1960	599
1961	415
1962	428
1963	760
1964	443
1965	525
1966	573
1967	623
1968	795
1969	530
1970	597
1971	381
1972	493
1973	734
1974	639
1975	844
1976	917
1977	1,112
1978	854
1979	1,309
1980	771
1981	1,386
1982	563
1983	1,420
1984	600
1985	765
1986	861
1987	1,609
1988	1,351
1989	952
1990	920
1991	533
1992	1,497
1993	706
1994	1,027
1995	1,882
1996	760
1997	1,191
1998	923
1999	888
2000	1,183
2001	1,036
2002	1,306
2003	860
2004	1,050
2005	865
2006	842
2007	1,116
2008	1,265
2009	839
2010	1,167
2011	1,239
2012	1,247
2013	752
2014	751
2015	880
2016	704
2017	565
2018	462
2019	615
2020	1,541
2021	1,118
2022	1,237
2023	1,094
2024	696
2025	455
2026	545

Download the Data

Data for records on 1986-08-18: 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	521
10 to 20	66
20 to 30	31
30 to 40	10
40 to 50	6
50 to 60	2
60 to 70	1
70 to 80	1