Weather Records on 17 August 2015

890 weather records were set or tied worldwide on 17 August 2015. Highest significance: Budapest, HU.

Key Facts for 17 August 2015

On 17 August 2015, 890 weather records were set or tied at long-record stations worldwide.
420 were record highs and 172 were record lows, counting maximum and minimum temperature.
By timescale, 6 were all-time records, 12 monthly and 872 daily.
Budapest set an all-time record daily precipitation of 115.4 mm (4.5 in) on 17 August 2015.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 471 records.

Record Map

890 stations

890 station records on 17 August 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Budapest	Hungary	Record daily precipitation	115.4 mm (4.5 in)	78 of 100 (Major)
Washta	United States	Record daily precipitation	144.0 mm (5.7 in)	77 of 100 (Major)
Le Mars	United States	Record daily precipitation	139.7 mm (5.5 in)	75 of 100 (Major)
Hvar	Croatia	Record daily precipitation	64.9 mm (2.6 in)	72 of 100 (Major)
Soltau	Germany	Record daily precipitation	58.2 mm (2.3 in)	68 of 100 (Major)
Nanchong	China	Record daily precipitation	140.2 mm (5.5 in)	64 of 100 (Major)
Wolfsburg (Sudwest)	Germany	Record daily precipitation	53.7 mm (2.1 in)	63 of 100 (Major)
Harzgerode	Germany	Record daily precipitation	39.9 mm (1.6 in)	62 of 100 (Major)
Mehringen	Germany	Record daily precipitation	39.3 mm (1.5 in)	61 of 100 (Major)
Schierke	Germany	Record daily precipitation	50.1 mm (2.0 in)	60 of 100 (Major)
Nossen	Germany	Record daily precipitation	44.2 mm (1.7 in)	59 of 100 (Notable)
Spencer 1 N	United States	Record daily precipitation	74.4 mm (2.9 in)	59 of 100 (Notable)
Dresden-Strehlen	Germany	Record daily precipitation	51.5 mm (2.0 in)	58 of 100 (Notable)
Quedlinburg	Germany	Record daily precipitation	37.7 mm (1.5 in)	58 of 100 (Notable)
Primghar	United States	Record daily precipitation	81.3 mm (3.2 in)	56 of 100 (Notable)
Centerville 6 SE	United States	Record daily precipitation	43.7 mm (1.7 in)	54 of 100 (Notable)
Bernburg/Saale (Nord)	Germany	Record daily precipitation	28.7 mm (1.1 in)	53 of 100 (Notable)
Cherokee	United States	Record daily precipitation	113.5 mm (4.5 in)	53 of 100 (Notable)
Winterswijk	Netherlands	Record daily precipitation	25.8 mm (1.0 in)	52 of 100 (Notable)
Denekamp	Netherlands	Record daily precipitation	32.9 mm (1.3 in)	52 of 100 (Notable)
Magdeburg	Germany	Record daily precipitation	33.4 mm (1.3 in)	50 of 100 (Notable)
Fichtelberg	Germany	Record daily precipitation	49.9 mm (2.0 in)	50 of 100 (Notable)
Kreileroord	Netherlands	Record daily precipitation	33.3 mm (1.3 in)	50 of 100 (Notable)
Hannover	Germany	Record daily precipitation	38.5 mm (1.5 in)	49 of 100 (Notable)
Leipzig-Schkeuditz	Germany	Record daily precipitation	29.1 mm (1.1 in)	49 of 100 (Notable)
Nordhorn	Germany	Record daily precipitation	29.8 mm (1.2 in)	49 of 100 (Notable)
Milford 4 NW	United States	Record daily precipitation	43.2 mm (1.7 in)	48 of 100 (Notable)
Rapid City Rgnl AP	United States	Record daily precipitation	39.4 mm (1.6 in)	48 of 100 (Notable)
Aue	Germany	Record daily precipitation	34.4 mm (1.4 in)	47 of 100 (Notable)
Ocna Sugatag	Romania	Record daily precipitation	52.8 mm (2.1 in)	47 of 100 (Notable)
Sioux Ctr 2 SE	United States	Record daily precipitation	77.0 mm (3.0 in)	47 of 100 (Notable)
Lichtentanne	Germany	Record daily precipitation	25.1 mm (1.0 in)	46 of 100 (Notable)
Colfax	United States	Record high maximum temperature	40.6 C (105.1 F)	46 of 100 (Notable)
Garsebach Bei Meissen	Germany	Record daily precipitation	46.7 mm (1.8 in)	45 of 100 (Notable)
Nienburg	Germany	Record daily precipitation	27.6 mm (1.1 in)	45 of 100 (Notable)
Zinnwald-Georgenfeld	Germany	Record daily precipitation	52.9 mm (2.1 in)	45 of 100 (Notable)
Stavoren_1	Netherlands	Record daily precipitation	34.3 mm (1.4 in)	45 of 100 (Notable)
Dresden-Hosterwitz	Germany	Record daily precipitation	46.0 mm (1.8 in)	44 of 100 (Notable)
Marienberg	Germany	Record daily precipitation	44.3 mm (1.7 in)	44 of 100 (Notable)
Mojave	United States	Record high maximum temperature	42.8 C (109.0 F)	44 of 100 (Notable)
Ewing	United States	Record low maximum temperature	17.8 C (64.0 F)	44 of 100 (Notable)
Wernigerode	Germany	Record daily precipitation	27.8 mm (1.1 in)	43 of 100 (Notable)
Hurbanovo	Slovakia	Record daily precipitation	90.2 mm (3.6 in)	43 of 100 (Notable)
Richmond	United States	Record high maximum temperature	33.9 C (93.0 F)	43 of 100 (Notable)
Beaver City	United States	Record low maximum temperature	21.7 C (71.1 F)	43 of 100 (Notable)
Marion	United States	Record daily precipitation	50.5 mm (2.0 in)	43 of 100 (Notable)
Kewaunee	United States	Record high minimum temperature	21.7 C (71.1 F)	43 of 100 (Notable)
Marienberg-Reitzenhain	Germany	Record daily precipitation	38.5 mm (1.5 in)	42 of 100 (Notable)
Medemblik	Netherlands	Record daily precipitation	35.3 mm (1.4 in)	42 of 100 (Notable)
De Kooy	Netherlands	Record daily precipitation	36.7 mm (1.4 in)	42 of 100 (Notable)
Sibiu	Romania	Record daily precipitation	36.4 mm (1.4 in)	42 of 100 (Notable)
Oelrichs	United States	Record low maximum temperature	21.7 C (71.1 F)	42 of 100 (Notable)
Yokkaichi	Japan	Record daily precipitation	142.0 mm (5.6 in)	41 of 100 (Notable)
Schagen	Netherlands	Record daily precipitation	39.6 mm (1.6 in)	41 of 100 (Notable)
Cheboygan	United States	Record high minimum temperature	21.1 C (70.0 F)	41 of 100 (Notable)
Minatare Dam (Usbr)	United States	Record low maximum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Waikiki 717.2	United States	Record high maximum temperature	34.4 C (93.9 F)	41 of 100 (Notable)
Celle (Stadt)	Germany	Record daily precipitation	32.8 mm (1.3 in)	40 of 100 (Notable)
Chemnitz	Germany	Record daily precipitation	26.4 mm (1.0 in)	40 of 100 (Notable)
Dubrovnik	Croatia	Record daily precipitation	82.5 mm (3.2 in)	40 of 100 (Notable)

Counts by Type and Timescale

890 records

Records set or tied on 17 August 2015 by type: Highest daily maximum 177, Lowest daily maximum 142, Highest daily minimum 243, Lowest daily minimum 30, Heaviest daily rainfall 298.

Records on 17 August 2015 by type
Record type	Records
Highest daily maximum	177
Lowest daily maximum	142
Highest daily minimum	243
Lowest daily minimum	30
Heaviest daily rainfall	298
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 2015 by timescale: all-time 6, monthly 12, daily 872.

How Much Records Were Beaten By

729 broken records

Margins by which the 729 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 102.9. Ties are not counted.

Top 20 by Significance

17 August 2015

Top 20 records on 17 August 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 2015	Budapest, HU	all-time rain	115.4 mm (4.5 in)	21.5 mm (0.8 in)	78 years	78 of 100 (Major)
17 August 2015	Washta, US	all-time rain	144.0 mm (5.7 in)	26.4 mm (1.0 in)	88 years	77 of 100 (Major)
17 August 2015	Le Mars, US	daily rain	139.7 mm (5.5 in)	102.9 mm (4.1 in)	84 years	75 of 100 (Major)
17 August 2015	Hvar, HR	daily rain	64.9 mm (2.6 in)	45.1 mm (1.8 in)	143 years	72 of 100 (Major)
17 August 2015	Soltau, DE	daily rain	58.2 mm (2.3 in)	25.4 mm (1.0 in)	66 years	68 of 100 (Major)
17 August 2015	Nanchong, CN	daily rain	140.2 mm (5.5 in)	86.4 mm (3.4 in)	62 years	64 of 100 (Major)
17 August 2015	Wolfsburg (Sudwest), DE	daily rain	53.7 mm (2.1 in)	35.3 mm (1.4 in)	52 years	63 of 100 (Major)
17 August 2015	Harzgerode, DE	daily rain	39.9 mm (1.6 in)	26.9 mm (1.1 in)	52 years	62 of 100 (Major)
17 August 2015	Mehringen, DE	daily rain	39.3 mm (1.5 in)	24.8 mm (1.0 in)	52 years	61 of 100 (Major)
17 August 2015	Schierke, DE	daily rain	50.1 mm (2.0 in)	29.1 mm (1.1 in)	34 years	60 of 100 (Major)
17 August 2015	Nossen, DE	daily rain	44.2 mm (1.7 in)	14.9 mm (0.6 in)	101 years	59 of 100 (Notable)
17 August 2015	Spencer 1 N, US	daily rain	74.4 mm (2.9 in)	37.3 mm (1.5 in)	77 years	59 of 100 (Notable)
17 August 2015	Dresden-Strehlen, DE	daily rain	51.5 mm (2.0 in)	24.3 mm (1.0 in)	69 years	58 of 100 (Notable)
17 August 2015	Quedlinburg, DE	daily rain	37.7 mm (1.5 in)	23.4 mm (0.9 in)	52 years	58 of 100 (Notable)
17 August 2015	Primghar, US	daily rain	81.3 mm (3.2 in)	28.7 mm (1.1 in)	117 years	56 of 100 (Notable)
17 August 2015	Centerville 6 SE, US	daily rain	43.7 mm (1.7 in)	16.5 mm (0.6 in)	115 years	54 of 100 (Notable)
17 August 2015	Bernburg/Saale (Nord), DE	daily rain	28.7 mm (1.1 in)	9.0 mm (0.35 in)	112 years	53 of 100 (Notable)
17 August 2015	Cherokee, US	daily rain	113.5 mm (4.5 in)	64.0 mm (2.5 in)	14 years	53 of 100 (Notable)
17 August 2015	Winterswijk, NL	daily rain	25.8 mm (1.0 in)	7.6 mm (0.30 in)	106 years	52 of 100 (Notable)
17 August 2015	Denekamp, NL	daily rain	32.9 mm (1.3 in)	7.9 mm (0.31 in)	106 years	52 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 2015

Records set or tied on this calendar date in each year from 1797 to 2015. 2015 had 890 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 2015-08-17: 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	682
20 to 40	38
40 to 60	5
60 to 80	2
80 to 100	1
100 to 120	1