Weather Records on 18 August 1989

952 weather records were set or tied worldwide on 18 August 1989. Highest significance: Myra, AU.

Key Facts for 18 August 1989

On 18 August 1989, 952 weather records were set or tied at long-record stations worldwide.
171 were record highs and 171 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 20 monthly and 930 daily.
Myra set a monthly record daily precipitation of 120.0 mm (4.7 in) on 18 August 1989.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 438 records.

Record Map

952 stations

952 station records on 18 August 1989 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 1989: highest significance records shown on the map
Station	Country	Type	Value	Significance
Myra	Australia	Record daily precipitation	120.0 mm (4.7 in)	71 of 100 (Major)
Bannister	Australia	Record daily precipitation	57.2 mm (2.3 in)	70 of 100 (Major)
Mc Intosh 6 SE	United States	Record daily precipitation	50.8 mm (2.0 in)	66 of 100 (Major)
Mt Sterling	United States	Record daily precipitation	73.9 mm (2.9 in)	63 of 100 (Major)
Crohamhurst	Australia	Record daily precipitation	55.2 mm (2.2 in)	62 of 100 (Major)
Darkan	Australia	Record daily precipitation	39.0 mm (1.5 in)	61 of 100 (Major)
Mc Clusky	United States	Record daily precipitation	35.1 mm (1.4 in)	61 of 100 (Major)
Harvey Post Office	Australia	Record daily precipitation	75.8 mm (3.0 in)	59 of 100 (Notable)
Ft Yates 4 SW	United States	Record daily precipitation	51.1 mm (2.0 in)	59 of 100 (Notable)
Willigulli North	Australia	Record daily precipitation	30.2 mm (1.2 in)	58 of 100 (Notable)
Cranbrook	Australia	Record daily precipitation	29.2 mm (1.1 in)	58 of 100 (Notable)
Mt Brisbane	Australia	Record daily precipitation	35.0 mm (1.4 in)	56 of 100 (Notable)
Ft Valley	United States	Record daily precipitation	50.8 mm (2.0 in)	55 of 100 (Notable)
Coominya Post Office	Australia	Record daily precipitation	27.0 mm (1.1 in)	53 of 100 (Notable)
Horseshoe	Australia	Record daily precipitation	34.0 mm (1.3 in)	52 of 100 (Notable)
Tangier Island	United States	Record daily precipitation	127.8 mm (5.0 in)	52 of 100 (Notable)
Boyup Brook	Australia	Record daily precipitation	40.4 mm (1.6 in)	51 of 100 (Notable)
Rosewood Walloon Rd	Australia	Record daily precipitation	34.4 mm (1.4 in)	51 of 100 (Notable)
Wungong Dam	Australia	Record daily precipitation	69.0 mm (2.7 in)	50 of 100 (Notable)
Yathroo	Australia	Record daily precipitation	35.0 mm (1.4 in)	50 of 100 (Notable)
Wooroloo	Australia	Record daily precipitation	47.0 mm (1.9 in)	50 of 100 (Notable)
Jamestown Muni AP	United States	Record daily precipitation	49.0 mm (1.9 in)	50 of 100 (Notable)
Glen Mervyn	Australia	Record daily precipitation	50.6 mm (2.0 in)	49 of 100 (Notable)
Karaul Keldy	Kazakhstan	Record daily precipitation	27.0 mm (1.1 in)	49 of 100 (Notable)
Williamsburg 2 N	United States	Record daily precipitation	287.8 mm (11.3 in)	49 of 100 (Notable)
Langley AFB	United States	Record daily precipitation	93.7 mm (3.7 in)	49 of 100 (Notable)
Nannup	Australia	Record daily precipitation	52.4 mm (2.1 in)	48 of 100 (Notable)
Broomehill	Australia	Record daily precipitation	26.0 mm (1.0 in)	48 of 100 (Notable)
Bullyard	Australia	Record daily precipitation	62.0 mm (2.4 in)	48 of 100 (Notable)
Teresa Dale	Australia	Record daily precipitation	36.8 mm (1.4 in)	47 of 100 (Notable)
Mannersley	Australia	Record daily precipitation	78.0 mm (3.1 in)	47 of 100 (Notable)
Eumundi - Crescent Rd	Australia	Record daily precipitation	45.4 mm (1.8 in)	47 of 100 (Notable)
Xiamen	China	Record daily precipitation	135.9 mm (5.4 in)	46 of 100 (Notable)
Aberdeen	United States	Record daily precipitation	65.5 mm (2.6 in)	46 of 100 (Notable)
Goodland	United States	Record daily precipitation	42.4 mm (1.7 in)	46 of 100 (Notable)
Benalla	Australia	Record daily precipitation	32.0 mm (1.3 in)	45 of 100 (Notable)
Newlyn - Cynthia	Australia	Record daily precipitation	53.0 mm (2.1 in)	45 of 100 (Notable)
Bell Ranch	United States	Record daily precipitation	32.3 mm (1.3 in)	45 of 100 (Notable)
Sharon	United States	Record daily precipitation	42.7 mm (1.7 in)	45 of 100 (Notable)
Spearwood	Australia	Record daily precipitation	46.8 mm (1.8 in)	44 of 100 (Notable)
Duranillin	Australia	Record daily precipitation	43.4 mm (1.7 in)	44 of 100 (Notable)
Mundubbera	Australia	Record daily precipitation	41.4 mm (1.6 in)	44 of 100 (Notable)
Franklyn Vale	Australia	Record daily precipitation	27.5 mm (1.1 in)	44 of 100 (Notable)
Tambellup	Australia	Record daily precipitation	28.0 mm (1.1 in)	43 of 100 (Notable)
Begumpet Obsy	India	Record daily precipitation	58.7 mm (2.3 in)	43 of 100 (Notable)
Lewisburg 3 N	United States	Record low maximum temperature	18.3 C (64.9 F)	43 of 100 (Notable)
Roelands Village	Australia	Record daily precipitation	57.2 mm (2.3 in)	42 of 100 (Notable)
Wagin	Australia	Record daily precipitation	26.0 mm (1.0 in)	42 of 100 (Notable)
Forest Hill	Australia	Record daily precipitation	27.0 mm (1.1 in)	42 of 100 (Notable)
Rinconada	Mexico	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Chidlow	Australia	Record daily precipitation	45.4 mm (1.8 in)	41 of 100 (Notable)
Burketown Post Office	Australia	Record low maximum temperature	24.5 C (76.1 F)	41 of 100 (Notable)
Warra Post Office	Australia	Record daily precipitation	29.0 mm (1.1 in)	41 of 100 (Notable)
San Felipe Orizatlan (Smn)	Mexico	Record daily precipitation	95.0 mm (3.7 in)	41 of 100 (Notable)
Saint Johns	United States	Record daily precipitation	25.4 mm (1.0 in)	41 of 100 (Notable)
Gingin	Australia	Record daily precipitation	32.8 mm (1.3 in)	40 of 100 (Notable)
Busselton Shire	Australia	Record daily precipitation	69.4 mm (2.7 in)	40 of 100 (Notable)
Waroona	Australia	Record daily precipitation	59.0 mm (2.3 in)	40 of 100 (Notable)
Condinup	Australia	Record daily precipitation	32.2 mm (1.3 in)	40 of 100 (Notable)
Gallangowan Forestry	Australia	Record daily precipitation	40.0 mm (1.6 in)	40 of 100 (Notable)

Counts by Type and Timescale

952 records

Records set or tied on 18 August 1989 by type: Highest daily maximum 59, Lowest daily maximum 97, Highest daily minimum 112, Lowest daily minimum 74, Heaviest daily rainfall 610.

Records on 18 August 1989 by type
Record type	Records
Highest daily maximum	59
Lowest daily maximum	97
Highest daily minimum	112
Lowest daily minimum	74
Heaviest daily rainfall	610
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 1989 by timescale: all-time 2, monthly 20, daily 930.

How Much Records Were Beaten By

825 broken records

Margins by which the 825 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 118.7. Ties are not counted.

Top 20 by Significance

18 August 1989

Top 20 records on 18 August 1989 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1989	Myra, AU	monthly rain	120.0 mm (4.7 in)	79.9 mm (3.1 in)	44 years	71 of 100 (Major)
18 August 1989	Bannister, AU	daily rain	57.2 mm (2.3 in)	32.6 mm (1.3 in)	68 years	70 of 100 (Major)
18 August 1989	Mc Intosh 6 SE, US	daily rain	50.8 mm (2.0 in)	36.8 mm (1.4 in)	72 years	66 of 100 (Major)
18 August 1989	Mt Sterling, US	daily rain	73.9 mm (2.9 in)	42.9 mm (1.7 in)	82 years	63 of 100 (Major)
18 August 1989	Crohamhurst, AU	daily rain	55.2 mm (2.2 in)	35.6 mm (1.4 in)	60 years	62 of 100 (Major)
18 August 1989	Darkan, AU	daily rain	39.0 mm (1.5 in)	23.0 mm (0.9 in)	68 years	61 of 100 (Major)
18 August 1989	Mc Clusky, US	daily rain	35.1 mm (1.4 in)	27.5 mm (1.1 in)	71 years	61 of 100 (Major)
18 August 1989	Harvey Post Office, AU	daily rain	75.8 mm (3.0 in)	51.2 mm (2.0 in)	34 years	59 of 100 (Notable)
18 August 1989	Ft Yates 4 SW, US	daily rain	51.1 mm (2.0 in)	23.9 mm (0.9 in)	89 years	59 of 100 (Notable)
18 August 1989	Willigulli North, AU	daily rain	30.2 mm (1.2 in)	17.5 mm (0.7 in)	80 years	58 of 100 (Notable)
18 August 1989	Cranbrook, AU	daily rain	29.2 mm (1.1 in)	16.0 mm (0.6 in)	56 years	58 of 100 (Notable)
18 August 1989	Mt Brisbane, AU	daily rain	35.0 mm (1.4 in)	17.7 mm (0.7 in)	90 years	56 of 100 (Notable)
18 August 1989	Ft Valley, US	daily rain	50.8 mm (2.0 in)	27.9 mm (1.1 in)	44 years	55 of 100 (Notable)
18 August 1989	Coominya Post Office, AU	daily rain	27.0 mm (1.1 in)	22.9 mm (0.9 in)	72 years	53 of 100 (Notable)
18 August 1989	Horseshoe, AU	daily rain	34.0 mm (1.3 in)	17.7 mm (0.7 in)	56 years	52 of 100 (Notable)
18 August 1989	Tangier Island, US	daily rain	127.8 mm (5.0 in)	118.7 mm (4.7 in)	32 years	52 of 100 (Notable)
18 August 1989	Boyup Brook, AU	daily rain	40.4 mm (1.6 in)	19.8 mm (0.8 in)	56 years	51 of 100 (Notable)
18 August 1989	Rosewood Walloon Rd, AU	daily rain	34.4 mm (1.4 in)	22.5 mm (0.9 in)	60 years	51 of 100 (Notable)
18 August 1989	Wungong Dam, AU	daily rain	69.0 mm (2.7 in)	30.9 mm (1.2 in)	68 years	50 of 100 (Notable)
18 August 1989	Yathroo, AU	daily rain	35.0 mm (1.4 in)	12.6 mm (0.5 in)	80 years	50 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 1989

Records set or tied on this calendar date in each year from 1797 to 1989. 1989 had 952 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 1989-08-18: 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 20	745
20 to 40	66
40 to 60	9
60 to 80	3
80 to 100	1
100 to 120	1