Weather Records on 17 August 1986

916 weather records were set or tied worldwide on 17 August 1986. Highest significance: Bundaberg Post Office, AU.

Key Facts for 17 August 1986

On 17 August 1986, 916 weather records were set or tied at long-record stations worldwide.
301 were record highs and 143 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 21 monthly and 894 daily.
Bundaberg Post Office set a daily record precipitation of 69.0 mm (2.7 in) on 17 August 1986.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 471 records.

Record Map

916 stations

916 station records on 17 August 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bundaberg Post Office	Australia	Record daily precipitation	69.0 mm (2.7 in)	75 of 100 (Major)
Dotswood Station	Australia	Record daily precipitation	31.0 mm (1.2 in)	71 of 100 (Major)
Fairymead Sugar Mill	Australia	Record daily precipitation	64.6 mm (2.5 in)	70 of 100 (Major)
Stanwell Post Office	Australia	Record daily precipitation	46.5 mm (1.8 in)	65 of 100 (Major)
Burnett Heads Niell St	Australia	Record daily precipitation	58.4 mm (2.3 in)	64 of 100 (Major)
Calliope Station	Australia	Record daily precipitation	45.0 mm (1.8 in)	64 of 100 (Major)
Gracemere Russell St	Australia	Record daily precipitation	43.2 mm (1.7 in)	62 of 100 (Major)
Moonmera	Australia	Record daily precipitation	50.0 mm (2.0 in)	61 of 100 (Major)
Waterloo	Australia	Record daily precipitation	59.0 mm (2.3 in)	57 of 100 (Notable)
Langmorn	Australia	Record daily precipitation	30.4 mm (1.2 in)	57 of 100 (Notable)
Boona-Choppa	Australia	Record daily precipitation	65.0 mm (2.6 in)	55 of 100 (Notable)
Princeton	United States	Record daily precipitation	71.1 mm (2.8 in)	55 of 100 (Notable)
Chaska	United States	Record daily precipitation	68.1 mm (2.7 in)	53 of 100 (Notable)
Moorestown 4 E	United States	Record daily precipitation	59.7 mm (2.4 in)	52 of 100 (Notable)
Brookings 2 NE	United States	Record daily precipitation	33.3 mm (1.3 in)	52 of 100 (Notable)
Calliope Post Office	Australia	Record daily precipitation	72.2 mm (2.8 in)	51 of 100 (Notable)
Charnwood	Australia	Record daily precipitation	46.6 mm (1.8 in)	51 of 100 (Notable)
Rookwood	Australia	Record daily precipitation	30.2 mm (1.2 in)	50 of 100 (Notable)
Alexandria (Pol)	South Africa	Record daily precipitation	59.5 mm (2.3 in)	50 of 100 (Notable)
Naalehu 14	United States	Record low maximum temperature	22.2 C (72.0 F)	50 of 100 (Notable)
Raglan	Australia	Record daily precipitation	49.0 mm (1.9 in)	49 of 100 (Notable)
Miara	Australia	Record daily precipitation	77.0 mm (3.0 in)	49 of 100 (Notable)
Annanvale	Australia	Record daily precipitation	49.6 mm (2.0 in)	48 of 100 (Notable)
Westwood Store	Australia	Record daily precipitation	47.8 mm (1.9 in)	48 of 100 (Notable)
Kroombit	Australia	Record daily precipitation	29.0 mm (1.1 in)	48 of 100 (Notable)
Booroondarra	Australia	Record daily precipitation	35.8 mm (1.4 in)	47 of 100 (Notable)
Mannersley	Australia	Record daily precipitation	51.0 mm (2.0 in)	46 of 100 (Notable)
Bargara	Australia	Record daily precipitation	60.0 mm (2.4 in)	46 of 100 (Notable)
Dululu Post Office	Australia	Record daily precipitation	42.4 mm (1.7 in)	46 of 100 (Notable)
Plaisance (Mauritiu	Mauritius	Record daily precipitation	107.9 mm (4.2 in)	46 of 100 (Notable)
Darts Creek	Australia	Record daily precipitation	50.4 mm (2.0 in)	45 of 100 (Notable)
Berryville	United States	Record daily precipitation	71.1 mm (2.8 in)	45 of 100 (Notable)
Newport 2 NNW	United States	Record daily precipitation	63.5 mm (2.5 in)	45 of 100 (Notable)
Glenlands	Australia	Record daily precipitation	42.6 mm (1.7 in)	44 of 100 (Notable)
Harnosand	Sweden	Record daily precipitation	47.3 mm (1.9 in)	44 of 100 (Notable)
Kalapa	Australia	Record daily precipitation	45.2 mm (1.8 in)	42 of 100 (Notable)
Rockhampton Aero	Australia	Record daily precipitation	40.8 mm (1.6 in)	42 of 100 (Notable)
Caloundra Signal Station	Australia	Record daily precipitation	28.4 mm (1.1 in)	42 of 100 (Notable)
Fanning River Station	Australia	Record daily precipitation	32.0 mm (1.3 in)	41 of 100 (Notable)
Callemondah Station	Australia	Record daily precipitation	51.0 mm (2.0 in)	41 of 100 (Notable)
Ubobo Store	Australia	Record daily precipitation	48.3 mm (1.9 in)	41 of 100 (Notable)
Howard Post Office	Australia	Record daily precipitation	28.8 mm (1.1 in)	41 of 100 (Notable)
Guaimbe	Brazil	Record daily precipitation	32.0 mm (1.3 in)	41 of 100 (Notable)
Ulricehamn	Sweden	Record low maximum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Plain Dealing	United States	Record daily precipitation	48.3 mm (1.9 in)	41 of 100 (Notable)
Yaamba	Australia	Record daily precipitation	29.2 mm (1.1 in)	40 of 100 (Notable)
Broadmeadows	Australia	Record daily precipitation	39.4 mm (1.6 in)	40 of 100 (Notable)
Como	Australia	Record daily precipitation	36.2 mm (1.4 in)	40 of 100 (Notable)
Jimenez (Smn)	Mexico	Record high minimum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Oestersund-Froesoen	Sweden	Record low maximum temperature	10.5 C (50.9 F)	40 of 100 (Notable)
Manchester 4 W	United States	Record daily precipitation	37.1 mm (1.5 in)	40 of 100 (Notable)
Forestburg 4 NNE	United States	Record daily precipitation	38.1 mm (1.5 in)	40 of 100 (Notable)
Harnosand	Sweden	Record low maximum temperature	12.6 C (54.7 F)	39 of 100 (Notable)
Indal_D	Sweden	Record daily precipitation	31.5 mm (1.2 in)	39 of 100 (Notable)
Aztec Ruins Nm	United States	Record high maximum temperature	36.7 C (98.1 F)	39 of 100 (Notable)
Winfield	Australia	Record daily precipitation	50.4 mm (2.0 in)	38 of 100 (Notable)
Kungur	Russia	Record daily precipitation	27.8 mm (1.1 in)	38 of 100 (Notable)
Frykfors	Sweden	Record daily precipitation	39.1 mm (1.5 in)	38 of 100 (Notable)
Chatom	United States	Record high minimum temperature	28.9 C (84.0 F)	38 of 100 (Notable)
Climax	United States	Record high minimum temperature	7.2 C (45.0 F)	38 of 100 (Notable)

Counts by Type and Timescale

916 records

Records set or tied on 17 August 1986 by type: Highest daily maximum 149, Lowest daily maximum 89, Highest daily minimum 152, Lowest daily minimum 54, Heaviest daily rainfall 472.

Records on 17 August 1986 by type
Record type	Records
Highest daily maximum	149
Lowest daily maximum	89
Highest daily minimum	152
Lowest daily minimum	54
Heaviest daily rainfall	472
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 1986 by timescale: all-time 1, monthly 21, daily 894.

How Much Records Were Beaten By

718 broken records

Margins by which the 718 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 68.4. Ties are not counted.

Top 20 by Significance

17 August 1986

Top 20 records on 17 August 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 1986	Bundaberg Post Office, AU	daily rain	69.0 mm (2.7 in)	47.9 mm (1.9 in)	87 years	75 of 100 (Major)
17 August 1986	Dotswood Station, AU	daily rain	31.0 mm (1.2 in)	31.0 mm (1.2 in)	88 years	71 of 100 (Major)
17 August 1986	Fairymead Sugar Mill, AU	daily rain	64.6 mm (2.5 in)	50.1 mm (2.0 in)	68 years	70 of 100 (Major)
17 August 1986	Stanwell Post Office, AU	daily rain	46.5 mm (1.8 in)	35.1 mm (1.4 in)	68 years	65 of 100 (Major)
17 August 1986	Burnett Heads Niell St, AU	daily rain	58.4 mm (2.3 in)	41.9 mm (1.6 in)	68 years	64 of 100 (Major)
17 August 1986	Calliope Station, AU	daily rain	45.0 mm (1.8 in)	38.6 mm (1.5 in)	60 years	64 of 100 (Major)
17 August 1986	Gracemere Russell St, AU	daily rain	43.2 mm (1.7 in)	30.5 mm (1.2 in)	80 years	62 of 100 (Major)
17 August 1986	Moonmera, AU	daily rain	50.0 mm (2.0 in)	34.8 mm (1.4 in)	68 years	61 of 100 (Major)
17 August 1986	Waterloo, AU	daily rain	59.0 mm (2.3 in)	47.6 mm (1.9 in)	33 years	57 of 100 (Notable)
17 August 1986	Langmorn, AU	daily rain	30.4 mm (1.2 in)	26.1 mm (1.0 in)	84 years	57 of 100 (Notable)
17 August 1986	Boona-Choppa, AU	daily rain	65.0 mm (2.6 in)	50.5 mm (2.0 in)	32 years	55 of 100 (Notable)
17 August 1986	Princeton, US	daily rain	71.1 mm (2.8 in)	46.0 mm (1.8 in)	39 years	55 of 100 (Notable)
17 August 1986	Chaska, US	daily rain	68.1 mm (2.7 in)	42.2 mm (1.7 in)	52 years	53 of 100 (Notable)
17 August 1986	Moorestown 4 E, US	daily rain	59.7 mm (2.4 in)	23.1 mm (0.9 in)	109 years	52 of 100 (Notable)
17 August 1986	Brookings 2 NE, US	daily rain	33.3 mm (1.3 in)	20.1 mm (0.8 in)	86 years	52 of 100 (Notable)
17 August 1986	Calliope Post Office, AU	daily rain	72.2 mm (2.8 in)	64.3 mm (2.5 in)	13 years	51 of 100 (Notable)
17 August 1986	Charnwood, AU	daily rain	46.6 mm (1.8 in)	45.3 mm (1.8 in)	20 years	51 of 100 (Notable)
17 August 1986	Rookwood, AU	daily rain	30.2 mm (1.2 in)	28.9 mm (1.1 in)	52 years	50 of 100 (Notable)
17 August 1986	Alexandria (Pol), ZA	daily rain	59.5 mm (2.3 in)	25.2 mm (1.0 in)	72 years	50 of 100 (Notable)
17 August 1986	Naalehu 14, US	daily low max	22.2 C (72.0 F)	3.4 C (6.1 F)	69 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 1986

Records set or tied on this calendar date in each year from 1797 to 1986. 1986 had 916 records.

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

Records on 08-17 in each year
Year	Records
1797	2
1802	2
1820	2
1837	1
1838	2
1841	2
1842	1
1845	2
1853	1
1854	1
1856	1
1857	1
1861	3
1862	1
1867	1
1868	3
1869	1
1872	1
1875	2
1876	5
1879	1
1881	1
1882	1
1883	2
1885	3
1886	1
1888	5
1891	1
1892	3
1893	2
1894	3
1895	2
1896	3
1897	1
1898	5
1899	8
1900	3
1901	14
1902	7
1903	6
1904	2
1905	11
1906	28
1907	9
1908	26
1909	24
1910	17
1911	18
1912	31
1913	79
1914	41
1915	28
1916	33
1917	35
1918	112
1919	37
1920	110
1921	37
1922	169
1923	161
1924	171
1925	130
1926	182
1927	228
1928	131
1929	243
1930	138
1931	302
1932	360
1933	260
1934	377
1935	437
1936	670
1937	726
1938	466
1939	364
1940	341
1941	378
1942	461
1943	743
1944	531
1945	387
1946	433
1947	682
1948	475
1949	371
1950	522
1951	413
1952	470
1953	345
1954	685
1955	465
1956	407
1957	504
1958	519
1959	543
1960	533
1961	998
1962	445
1963	650
1964	410
1965	641
1966	496
1967	679
1968	953
1969	593
1970	467
1971	447
1972	1,044
1973	750
1974	582
1975	612
1976	797
1977	1,216
1978	814
1979	1,464
1980	895
1981	1,112
1982	554
1983	1,574
1984	726
1985	948
1986	916
1987	1,150
1988	1,608
1989	687
1990	949
1991	560
1992	1,813
1993	803
1994	1,038
1995	1,724
1996	752
1997	1,544
1998	1,003
1999	697
2000	994
2001	1,101
2002	1,266
2003	948
2004	1,046
2005	722
2006	814
2007	1,646
2008	1,301
2009	922
2010	1,105
2011	956
2012	1,215
2013	802
2014	997
2015	890
2016	748
2017	544
2018	518
2019	467
2020	1,529
2021	800
2022	1,428
2023	1,032
2024	740
2025	538
2026	535

Download the Data

Data for records on 1986-08-17: 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	566
10 to 20	86
20 to 30	32
30 to 40	16
40 to 50	11
50 to 60	5
60 to 70	2