Weather Records on 17 August 1999

697 weather records were set or tied worldwide on 17 August 1999. Highest significance: Shenkursk, RU.

Key Facts for 17 August 1999

On 17 August 1999, 697 weather records were set or tied at long-record stations worldwide.
342 were record highs and 205 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 14 monthly and 681 daily.
Shenkursk set a daily record precipitation of 46.7 mm (1.8 in) on 17 August 1999.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 472 records.

Record Map

697 stations

697 station records on 17 August 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Shenkursk	Russia	Record daily precipitation	46.7 mm (1.8 in)	65 of 100 (Major)
N Platte Rgnl AP	United States	Record daily precipitation	52.3 mm (2.1 in)	56 of 100 (Notable)
Alvaro Obregon	Mexico	Record daily precipitation	178.6 mm (7.0 in)	54 of 100 (Notable)
Julesburg	United States	Record daily precipitation	45.0 mm (1.8 in)	54 of 100 (Notable)
Uzhhorod	Ukraine	Record daily precipitation	61.4 mm (2.4 in)	53 of 100 (Notable)
Hastings	United Kingdom	Record daily precipitation	40.5 mm (1.6 in)	52 of 100 (Notable)
Buracica	Brazil	Record daily precipitation	42.5 mm (1.7 in)	51 of 100 (Notable)
Skogfoss	Norway	Record daily precipitation	37.5 mm (1.5 in)	48 of 100 (Notable)
Allende	Mexico	Record high minimum temperature	28.9 C (84.0 F)	47 of 100 (Notable)
Sredhekolymsk	Russia	Record daily precipitation	25.7 mm (1.0 in)	46 of 100 (Notable)
Sumiha	Russia	Record daily precipitation	96.0 mm (3.8 in)	46 of 100 (Notable)
Falls City 7 WSW	United States	Record daily precipitation	113.0 mm (4.4 in)	45 of 100 (Notable)
Chicoasen (Cfe)	Mexico	Record daily precipitation	93.5 mm (3.7 in)	44 of 100 (Notable)
Macuspana (Dge)	Mexico	Record daily precipitation	125.5 mm (4.9 in)	44 of 100 (Notable)
Padun	Russia	Record daily precipitation	30.0 mm (1.2 in)	43 of 100 (Notable)
Jal	United States	Record high minimum temperature	26.7 C (80.1 F)	43 of 100 (Notable)
Yamonho	Mexico	Record daily precipitation	64.8 mm (2.6 in)	41 of 100 (Notable)
Verhnjaja Tojma	Russia	Record daily precipitation	31.0 mm (1.2 in)	41 of 100 (Notable)
Waynesboro	United States	Record low minimum temperature	10.6 C (51.1 F)	41 of 100 (Notable)
Inari Naatamo	Finland	Record daily precipitation	33.1 mm (1.3 in)	40 of 100 (Notable)
La Tinaja	Mexico	Record high maximum temperature	31.7 C (89.1 F)	40 of 100 (Notable)
Veines I Neiden	Norway	Record daily precipitation	32.2 mm (1.3 in)	40 of 100 (Notable)
Linkoeping-Malmslaett	Sweden	Record low minimum temperature	5.1 C (41.2 F)	39 of 100 (Notable)
Mt Pleasant	United States	Record high minimum temperature	26.1 C (79.0 F)	39 of 100 (Notable)
Ica	Russia	Record daily precipitation	34.2 mm (1.3 in)	38 of 100 (Notable)
Lincang	China	Record daily precipitation	67.2 mm (2.6 in)	37 of 100 (Notable)
Carnamah	Australia	Record high minimum temperature	17.5 C (63.5 F)	36 of 100 (Notable)
Northam	Australia	Record high minimum temperature	14.5 C (58.1 F)	36 of 100 (Notable)
Dalecarlia Rsvr	United States	Record high minimum temperature	30.6 C (87.1 F)	36 of 100 (Notable)
Rouen - Boos	France	Record daily precipitation	36.8 mm (1.4 in)	35 of 100 (Notable)
Vrouwenpolder	Netherlands	Record daily precipitation	27.1 mm (1.1 in)	35 of 100 (Notable)
Felipe Carrillo Puerto (Dge)	Mexico	Record low maximum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Washington 1 W	United States	Record low minimum temperature	7.8 C (46.0 F)	34 of 100 (Routine)
Little Falls 2NNE	United States	Record low minimum temperature	2.8 C (37.0 F)	34 of 100 (Routine)
Wandering Comparison	Australia	Record high minimum temperature	14.1 C (57.4 F)	33 of 100 (Routine)
San Juan de Aragon	Mexico	Record daily precipitation	37.8 mm (1.5 in)	33 of 100 (Routine)
Bogorodskoe	Russia	Record daily precipitation	25.1 mm (1.0 in)	33 of 100 (Routine)
Kellerberrin	Australia	Record high minimum temperature	13.9 C (57.0 F)	32 of 100 (Routine)
Saint Charles	United States	Record low minimum temperature	10.0 C (50.0 F)	32 of 100 (Routine)
Canaday Steam Plt	United States	Record daily precipitation	38.1 mm (1.5 in)	32 of 100 (Routine)
Talkeetna AP	United States	Record high maximum temperature	26.1 C (79.0 F)	32 of 100 (Routine)
Pinjarra	Australia	Record daily precipitation	37.9 mm (1.5 in)	30 of 100 (Routine)
Ostuta	Mexico	Record daily precipitation	74.2 mm (2.9 in)	30 of 100 (Routine)
Tres Zapotes	Mexico	Record daily precipitation	101.9 mm (4.0 in)	30 of 100 (Routine)
Slapton	United Kingdom	Record daily precipitation	26.3 mm (1.0 in)	30 of 100 (Routine)
El-Golea	Algeria	Record high minimum temperature	33.0 C (91.4 F)	29 of 100 (Routine)
Miyakonojo	Japan	Record low maximum temperature	24.8 C (76.6 F)	29 of 100 (Routine)
Aburatsu	Japan	Record low maximum temperature	26.2 C (79.2 F)	29 of 100 (Routine)
Ejido San Miguel	Mexico	Record low minimum temperature	13.9 C (57.0 F)	29 of 100 (Routine)
Bombana (Cfe)	Mexico	Record daily precipitation	80.3 mm (3.2 in)	29 of 100 (Routine)
Peto (Dge)	Mexico	Record low maximum temperature	27.8 C (82.0 F)	29 of 100 (Routine)
Konotop	Ukraine	Record daily precipitation	30.0 mm (1.2 in)	29 of 100 (Routine)
Zhytomyr	Ukraine	Record daily precipitation	26.9 mm (1.1 in)	29 of 100 (Routine)
Simao	China	Record daily precipitation	65.5 mm (2.6 in)	28 of 100 (Routine)
Chuuk WSO AP	Federated States of Micronesia	Record low minimum temperature	21.1 C (70.0 F)	28 of 100 (Routine)
Cuxhaven	Germany	Record daily precipitation	34.3 mm (1.4 in)	28 of 100 (Routine)
El Barril	Mexico	Record high maximum temperature	44.4 C (111.9 F)	28 of 100 (Routine)
Tlanchinol (Smn)	Mexico	Record daily precipitation	82.3 mm (3.2 in)	28 of 100 (Routine)
Villa Purificacion (Dge)	Mexico	Record high maximum temperature	37.8 C (100.0 F)	28 of 100 (Routine)
Presa Danxho	Mexico	Record low minimum temperature	3.9 C (39.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

697 records

Records set or tied on 17 August 1999 by type: Highest daily maximum 190, Lowest daily maximum 69, Highest daily minimum 152, Lowest daily minimum 136, Heaviest daily rainfall 150.

Records on 17 August 1999 by type
Record type	Records
Highest daily maximum	190
Lowest daily maximum	69
Highest daily minimum	152
Lowest daily minimum	136
Heaviest daily rainfall	150
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 1999 by timescale: all-time 2, monthly 14, daily 681.

How Much Records Were Beaten By

483 broken records

Margins by which the 483 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 102.1. Ties are not counted.

Top 20 by Significance

17 August 1999

Top 20 records on 17 August 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 1999	Shenkursk, RU	daily rain	46.7 mm (1.8 in)	27.4 mm (1.1 in)	52 years	65 of 100 (Major)
17 August 1999	N Platte Rgnl AP, US	daily rain	52.3 mm (2.1 in)	38.6 mm (1.5 in)	44 years	56 of 100 (Notable)
17 August 1999	Alvaro Obregon, MX	monthly rain	178.6 mm (7.0 in)	67.6 mm (2.7 in)	4 years	54 of 100 (Notable)
17 August 1999	Julesburg, US	daily rain	45.0 mm (1.8 in)	32.8 mm (1.3 in)	49 years	54 of 100 (Notable)
17 August 1999	Uzhhorod, UA	daily rain	61.4 mm (2.4 in)	38.6 mm (1.5 in)	29 years	53 of 100 (Notable)
17 August 1999	Hastings, GB	daily rain	40.5 mm (1.6 in)	26.0 mm (1.0 in)	36 years	52 of 100 (Notable)
17 August 1999	Buracica, BR	daily rain	42.5 mm (1.7 in)	27.5 mm (1.1 in)	26 years	51 of 100 (Notable)
17 August 1999	Skogfoss, NO	daily rain	37.5 mm (1.5 in)	27.9 mm (1.1 in)	17 years	48 of 100 (Notable)
17 August 1999	Allende, MX	daily high min	28.9 C (84.0 F)	6.1 C (11.0 F)	18 years	47 of 100 (Notable)
17 August 1999	Sredhekolymsk, RU	daily rain	25.7 mm (1.0 in)	16.9 mm (0.7 in)	12 years	46 of 100 (Notable)
17 August 1999	Sumiha, RU	all-time rain	96.0 mm (3.8 in)	5.1 mm (0.20 in)	48 years	46 of 100 (Notable)
17 August 1999	Falls City 7 WSW, US	daily rain	113.0 mm (4.4 in)	102.1 mm (4.0 in)	0 years	45 of 100 (Notable)
17 August 1999	Chicoasen (Cfe), MX	daily rain	93.5 mm (3.7 in)	58.7 mm (2.3 in)	4 years	44 of 100 (Notable)
17 August 1999	Macuspana (Dge), MX	daily rain	125.5 mm (4.9 in)	50.1 mm (2.0 in)	48 years	44 of 100 (Notable)
17 August 1999	Padun, RU	daily rain	30.0 mm (1.2 in)	18.9 mm (0.7 in)	52 years	43 of 100 (Notable)
17 August 1999	Jal, US	daily high min	26.7 C (80.1 F)	5.0 C (9.0 F)	42 years	43 of 100 (Notable)
17 August 1999	Yamonho, MX	daily rain	64.8 mm (2.6 in)	50.8 mm (2.0 in)	17 years	41 of 100 (Notable)
17 August 1999	Verhnjaja Tojma, RU	daily rain	31.0 mm (1.2 in)	23.4 mm (0.9 in)	9 years	41 of 100 (Notable)
17 August 1999	Waynesboro, US	daily low min	10.6 C (51.1 F)	0.5 C (0.9 F)	101 years	41 of 100 (Notable)
17 August 1999	Inari Naatamo, FI	daily rain	33.1 mm (1.3 in)	17.6 mm (0.7 in)	9 years	40 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 1999

Records set or tied on this calendar date in each year from 1797 to 1999. 1999 had 697 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 1999-08-17: 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 20	455
20 to 40	21
40 to 60	4
60 to 80	2
80 to 100	0
100 to 120	1