Weather Records on 17 August 1987

1,150 weather records were set or tied worldwide on 17 August 1987. Highest significance: Poona, IN.

Key Facts for 17 August 1987

On 17 August 1987, 1,150 weather records were set or tied at long-record stations worldwide.
540 were record highs and 309 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 28 monthly and 1,117 daily.
Poona set a monthly record daily precipitation of 142.0 mm (5.6 in) on 17 August 1987.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 470 records.

Record Map

1,150 stations

1,150 station records on 17 August 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Poona	India	Record daily precipitation	142.0 mm (5.6 in)	66 of 100 (Major)
Dynevor Downs	Australia	Record daily precipitation	60.0 mm (2.4 in)	65 of 100 (Major)
Mungindi Post Office	Australia	Record daily precipitation	38.0 mm (1.5 in)	65 of 100 (Major)
Warrabah	Australia	Record daily precipitation	82.0 mm (3.2 in)	64 of 100 (Major)
Boggabri (Milchengowrie)	Australia	Record daily precipitation	34.0 mm (1.3 in)	62 of 100 (Major)
Kurrowah	Australia	Record daily precipitation	47.0 mm (1.9 in)	54 of 100 (Notable)
Bonshaw (Campbell St)	Australia	Record daily precipitation	45.0 mm (1.8 in)	53 of 100 (Notable)
Coolesha	Australia	Record daily precipitation	51.5 mm (2.0 in)	52 of 100 (Notable)
Pjalica	Russia	Record daily precipitation	39.6 mm (1.6 in)	52 of 100 (Notable)
Dunmore State Forest	Australia	Record daily precipitation	49.2 mm (1.9 in)	50 of 100 (Notable)
Leichardt Farms	Australia	Record daily precipitation	34.0 mm (1.3 in)	48 of 100 (Notable)
Vergemont	Australia	Record daily precipitation	40.1 mm (1.6 in)	48 of 100 (Notable)
Cotonou	Benin	Record daily precipitation	43.9 mm (1.7 in)	47 of 100 (Notable)
Ak-Terk	Kyrgyzstan	Record daily precipitation	39.5 mm (1.6 in)	47 of 100 (Notable)
Sakon Nakhon	Thailand	Record daily precipitation	125.0 mm (4.9 in)	47 of 100 (Notable)
Columba	Australia	Record daily precipitation	48.0 mm (1.9 in)	46 of 100 (Notable)
Raznavolok	Russia	Record daily precipitation	42.2 mm (1.7 in)	46 of 100 (Notable)
Victoria Hill	Australia	Record daily precipitation	33.0 mm (1.3 in)	44 of 100 (Notable)
Khon Kaen	Thailand	Record daily precipitation	87.9 mm (3.5 in)	44 of 100 (Notable)
Condamine Plains	Australia	Record daily precipitation	46.6 mm (1.8 in)	43 of 100 (Notable)
Ponta Grossa-Vila Velha	Brazil	Record daily precipitation	51.4 mm (2.0 in)	43 of 100 (Notable)
Huichapan	Mexico	Record low maximum temperature	13.9 C (57.0 F)	43 of 100 (Notable)
Armagh	United Kingdom	Record high minimum temperature	17.4 C (63.3 F)	43 of 100 (Notable)
Newport	United States	Record high minimum temperature	25.6 C (78.1 F)	42 of 100 (Notable)
Arno	Australia	Record daily precipitation	35.0 mm (1.4 in)	41 of 100 (Notable)
Vyartsilya	Russia	Record daily precipitation	31.4 mm (1.2 in)	41 of 100 (Notable)
Rowena (Bunna Bunna)	Australia	Record daily precipitation	28.0 mm (1.1 in)	40 of 100 (Notable)
Kelvin (Carellan)	Australia	Record daily precipitation	25.0 mm (1.0 in)	40 of 100 (Notable)
Huimin	China	Record daily precipitation	91.1 mm (3.6 in)	40 of 100 (Notable)
Frankfort 2NE	United States	Record daily precipitation	40.6 mm (1.6 in)	40 of 100 (Notable)
Tingha (Crystal Hill)	Australia	Record daily precipitation	38.4 mm (1.5 in)	39 of 100 (Notable)
Gaddede	Sweden	Record low minimum temperature	-1.5 C (29.3 F)	39 of 100 (Notable)
Enosburg Falls	United States	Record high minimum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Inverell Comparison	Australia	Record daily precipitation	35.4 mm (1.4 in)	38 of 100 (Notable)
Bellbrook (East Street)	Australia	Record daily precipitation	33.0 mm (1.3 in)	38 of 100 (Notable)
Kiev	Ukraine	Record low maximum temperature	14.0 C (57.2 F)	38 of 100 (Notable)
Riggins	United States	Record low minimum temperature	5.6 C (42.1 F)	38 of 100 (Notable)
Ellsworth	United States	Record daily precipitation	41.7 mm (1.6 in)	38 of 100 (Notable)
Kalkaska	United States	Record daily precipitation	41.4 mm (1.6 in)	38 of 100 (Notable)
Hooker	United States	Record low minimum temperature	8.9 C (48.0 F)	38 of 100 (Notable)
Hot Springs	United States	Record low minimum temperature	6.1 C (43.0 F)	38 of 100 (Notable)
Griffiss AFB	United States	Record high maximum temperature	35.6 C (96.1 F)	38 of 100 (Notable)
Inverell Research Centre	Australia	Record daily precipitation	43.4 mm (1.7 in)	37 of 100 (Notable)
Villa Purificacion (Dge)	Mexico	Record low minimum temperature	15.0 C (59.0 F)	37 of 100 (Notable)
Kondopoga	Russia	Record daily precipitation	38.4 mm (1.5 in)	37 of 100 (Notable)
Duncan	United States	Record low minimum temperature	8.3 C (46.9 F)	37 of 100 (Notable)
Bellefontaine	United States	Record high minimum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Defiance	United States	Record high minimum temperature	22.8 C (73.0 F)	37 of 100 (Notable)
Dodgeville Wwtp	United States	Record daily precipitation	50.0 mm (2.0 in)	37 of 100 (Notable)
Manilla (Kimberley)	Australia	Record daily precipitation	40.5 mm (1.6 in)	36 of 100 (Notable)
Santa Cruz	Brazil	Record daily precipitation	46.5 mm (1.8 in)	36 of 100 (Notable)
Nikolaevskoe	Russia	Record daily precipitation	34.7 mm (1.4 in)	36 of 100 (Notable)
Mammoth Cave	United States	Record daily precipitation	55.1 mm (2.2 in)	36 of 100 (Notable)
Montpelier	United States	Record high minimum temperature	21.1 C (70.0 F)	36 of 100 (Notable)
Lexington	United States	Record high maximum temperature	35.6 C (96.1 F)	36 of 100 (Notable)
Franklin 2 NE	United States	Record high maximum temperature	35.0 C (95.0 F)	36 of 100 (Notable)
Barraba (Mount Lindsay)	Australia	Record daily precipitation	29.2 mm (1.1 in)	35 of 100 (Notable)
Kolezma	Russia	Record daily precipitation	56.1 mm (2.2 in)	35 of 100 (Notable)
Crowe's Place,Seven	South Africa	Record daily precipitation	25.0 mm (1.0 in)	35 of 100 (Notable)
Lugano	Switzerland	Record high minimum temperature	22.0 C (71.6 F)	35 of 100 (Notable)

Counts by Type and Timescale

1,150 records

Records set or tied on 17 August 1987 by type: Highest daily maximum 257, Lowest daily maximum 110, Highest daily minimum 283, Lowest daily minimum 199, Heaviest daily rainfall 301.

Records on 17 August 1987 by type
Record type	Records
Highest daily maximum	257
Lowest daily maximum	110
Highest daily minimum	283
Lowest daily minimum	199
Heaviest daily rainfall	301
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 1987 by timescale: all-time 5, monthly 28, daily 1,117.

How Much Records Were Beaten By

841 broken records

Margins by which the 841 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.9. Ties are not counted.

Top 20 by Significance

17 August 1987

Top 20 records on 17 August 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 1987	Poona, IN	monthly rain	142.0 mm (5.6 in)	33.3 mm (1.3 in)	31 years	66 of 100 (Major)
17 August 1987	Dynevor Downs, AU	monthly rain	60.0 mm (2.4 in)	18.1 mm (0.7 in)	78 years	65 of 100 (Major)
17 August 1987	Mungindi Post Office, AU	daily rain	38.0 mm (1.5 in)	26.8 mm (1.1 in)	85 years	65 of 100 (Major)
17 August 1987	Warrabah, AU	monthly rain	82.0 mm (3.2 in)	31.2 mm (1.2 in)	43 years	64 of 100 (Major)
17 August 1987	Boggabri (Milchengowrie), AU	daily rain	34.0 mm (1.3 in)	21.3 mm (0.8 in)	85 years	62 of 100 (Major)
17 August 1987	Kurrowah, AU	daily rain	47.0 mm (1.9 in)	29.2 mm (1.1 in)	53 years	54 of 100 (Notable)
17 August 1987	Bonshaw (Campbell St), AU	daily rain	45.0 mm (1.8 in)	37.4 mm (1.5 in)	14 years	53 of 100 (Notable)
17 August 1987	Coolesha, AU	monthly rain	51.5 mm (2.0 in)	13.9 mm (0.5 in)	61 years	52 of 100 (Notable)
17 August 1987	Pjalica, RU	daily rain	39.6 mm (1.6 in)	24.9 mm (1.0 in)	37 years	52 of 100 (Notable)
17 August 1987	Dunmore State Forest, AU	daily rain	49.2 mm (1.9 in)	38.3 mm (1.5 in)	21 years	50 of 100 (Notable)
17 August 1987	Leichardt Farms, AU	daily rain	34.0 mm (1.3 in)	26.6 mm (1.0 in)	32 years	48 of 100 (Notable)
17 August 1987	Vergemont, AU	daily rain	40.1 mm (1.6 in)	34.1 mm (1.3 in)	4 years	48 of 100 (Notable)
17 August 1987	Cotonou, BJ	daily rain	43.9 mm (1.7 in)	40.2 mm (1.6 in)	36 years	47 of 100 (Notable)
17 August 1987	Ak-Terk, KG	daily rain	39.5 mm (1.6 in)	35.9 mm (1.4 in)	29 years	47 of 100 (Notable)
17 August 1987	Sakon Nakhon, TH	daily rain	125.0 mm (4.9 in)	71.6 mm (2.8 in)	21 years	47 of 100 (Notable)
17 August 1987	Columba, AU	daily rain	48.0 mm (1.9 in)	33.0 mm (1.3 in)	14 years	46 of 100 (Notable)
17 August 1987	Raznavolok, RU	daily rain	42.2 mm (1.7 in)	31.3 mm (1.2 in)	4 years	46 of 100 (Notable)
17 August 1987	Victoria Hill, AU	daily rain	33.0 mm (1.3 in)	14.2 mm (0.6 in)	68 years	44 of 100 (Notable)
17 August 1987	Khon Kaen, TH	daily rain	87.9 mm (3.5 in)	50.3 mm (2.0 in)	29 years	44 of 100 (Notable)
17 August 1987	Condamine Plains, AU	daily rain	46.6 mm (1.8 in)	27.8 mm (1.1 in)	14 years	43 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 1987

Records set or tied on this calendar date in each year from 1797 to 1987. 1987 had 1,150 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 1987-08-17: 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	744
10 to 20	49
20 to 30	26
30 to 40	17
40 to 50	1
50 to 60	2
60 to 70	0
70 to 80	2