Weather Records on 17 August 2025

538 weather records were set or tied worldwide on 17 August 2025. Highest significance: De Smet, US.

Key Facts for 17 August 2025

On 17 August 2025, 538 weather records were set or tied at long-record stations worldwide.
373 were record highs and 74 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 7 monthly and 529 daily.
De Smet set a daily record precipitation of 86.1 mm (3.4 in) on 17 August 2025.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 473 records.

Record Map

538 stations

538 station records on 17 August 2025 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 2025: highest significance records shown on the map
Station	Country	Type	Value	Significance
De Smet	United States	Record daily precipitation	86.1 mm (3.4 in)	80 of 100 (Exceptional)
Ainsworth	United States	Record daily precipitation	70.9 mm (2.8 in)	79 of 100 (Major)
Togwotee Pass	United States	Record daily precipitation	55.9 mm (2.2 in)	61 of 100 (Major)
Decorah	United States	Record daily precipitation	73.7 mm (2.9 in)	57 of 100 (Notable)
Grand Meadow	United States	Record daily precipitation	160.0 mm (6.3 in)	57 of 100 (Notable)
Vinh	Vietnam	Record daily precipitation	266.7 mm (10.5 in)	52 of 100 (Notable)
Moundou	Chad	Record low minimum temperature	16.2 C (61.2 F)	50 of 100 (Notable)
Waseca S Rsch & Outreach Ctr	United States	Record daily precipitation	157.2 mm (6.2 in)	50 of 100 (Notable)
Custer	United States	Record daily precipitation	35.6 mm (1.4 in)	50 of 100 (Notable)
Lamberton SW Rsch & Outreach C	United States	Record daily precipitation	87.9 mm (3.5 in)	48 of 100 (Notable)
Eureka	United States	Record daily precipitation	39.6 mm (1.6 in)	48 of 100 (Notable)
Wallace	United States	Record high minimum temperature	22.2 C (72.0 F)	47 of 100 (Notable)
W Lafayette 6 NW	United States	Record high minimum temperature	26.1 C (79.0 F)	45 of 100 (Notable)
Perpignan	France	Record high minimum temperature	29.2 C (84.6 F)	44 of 100 (Notable)
Emmetsburg	United States	Record high minimum temperature	25.6 C (78.1 F)	44 of 100 (Notable)
Perpignan	France	Record high maximum temperature	39.5 C (103.1 F)	43 of 100 (Notable)
Huesca	Spain	Record high minimum temperature	25.1 C (77.2 F)	43 of 100 (Notable)
Ashland	United States	Record high minimum temperature	17.8 C (64.0 F)	43 of 100 (Notable)
Friendship	United States	Record daily precipitation	41.4 mm (1.6 in)	43 of 100 (Notable)
Canton 4N	United States	Record high minimum temperature	24.4 C (75.9 F)	42 of 100 (Notable)
Huelva	Spain	Record high minimum temperature	25.1 C (77.2 F)	41 of 100 (Notable)
Tracy	United States	Record daily precipitation	98.3 mm (3.9 in)	41 of 100 (Notable)
Hilo Intl AP 87	United States	Record low maximum temperature	25.0 C (77.0 F)	41 of 100 (Notable)
Rochester Intl AP	United States	Record daily precipitation	29.7 mm (1.2 in)	40 of 100 (Notable)
Morris 1NW	United States	Record daily precipitation	46.5 mm (1.8 in)	39 of 100 (Notable)
Winner	United States	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Tortosa - Observatorio del Ebr	Spain	Record high maximum temperature	41.7 C (107.1 F)	38 of 100 (Notable)
Mackay Lost Rvr Rs	United States	Record high minimum temperature	16.1 C (61.0 F)	38 of 100 (Notable)
Jornada Exp Range	United States	Record high minimum temperature	21.1 C (70.0 F)	38 of 100 (Notable)
Orlando Sanford AP	United States	Record daily precipitation	46.2 mm (1.8 in)	38 of 100 (Notable)
Zamora	Spain	Record high minimum temperature	21.8 C (71.2 F)	37 of 100 (Notable)
Sendai	Japan	Record high minimum temperature	26.8 C (80.2 F)	36 of 100 (Notable)
Sobolevo	Russia	Record daily precipitation	33.0 mm (1.3 in)	36 of 100 (Notable)
Zamora	Spain	Record high maximum temperature	39.1 C (102.4 F)	36 of 100 (Notable)
Montpellier-Aeroport	France	Record high maximum temperature	37.9 C (100.2 F)	35 of 100 (Notable)
Markovo	Russia	Record high minimum temperature	12.3 C (54.1 F)	35 of 100 (Notable)
Valladolid (Villanubla)	Spain	Record high maximum temperature	37.9 C (100.2 F)	35 of 100 (Notable)
White Sands Natl Mon	United States	Record high minimum temperature	23.3 C (73.9 F)	35 of 100 (Notable)
Beira	Mozambique	Record low minimum temperature	10.1 C (50.2 F)	34 of 100 (Routine)
Adjuntas 2 NW	Puerto Rico [United States]	Record daily precipitation	52.8 mm (2.1 in)	34 of 100 (Routine)
Marre-Sale	Russia	Record high maximum temperature	23.2 C (73.8 F)	34 of 100 (Routine)
Jerez de la Frontera	Spain	Record high maximum temperature	45.8 C (114.4 F)	34 of 100 (Routine)
Reus/Aeropuerto	Spain	Record high maximum temperature	39.7 C (103.5 F)	34 of 100 (Routine)
Rota NAS	Spain	Record high minimum temperature	25.0 C (77.0 F)	34 of 100 (Routine)
Stuttgart 9 ESE	United States	Record high minimum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Moore Haven Lock 1	United States	Record high minimum temperature	26.1 C (79.0 F)	34 of 100 (Routine)
Fargo 17 NE	United States	Record daily precipitation	70.6 mm (2.8 in)	34 of 100 (Routine)
Barcelona/Aeropuerto	Spain	Record high maximum temperature	35.6 C (96.1 F)	33 of 100 (Routine)
Burgos-Villafria	Spain	Record high maximum temperature	38.2 C (100.8 F)	33 of 100 (Routine)
Huelva	Spain	Record high maximum temperature	42.4 C (108.3 F)	33 of 100 (Routine)
Glad Valley 2 W	United States	Record daily precipitation	35.1 mm (1.4 in)	33 of 100 (Routine)
Cumberland	United States	Record daily precipitation	45.2 mm (1.8 in)	33 of 100 (Routine)
Montpellier-Aeroport	France	Record high minimum temperature	25.8 C (78.4 F)	32 of 100 (Routine)
Magaria	Niger	Record low maximum temperature	26.0 C (78.8 F)	32 of 100 (Routine)
Saint Francis	United States	Record high minimum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Maurine 12SW	United States	Record daily precipitation	27.9 mm (1.1 in)	32 of 100 (Routine)
Elfin Cove	United States	Record high maximum temperature	20.6 C (69.1 F)	32 of 100 (Routine)
Lexington Kelly Fld	United States	Record high minimum temperature	22.2 C (72.0 F)	32 of 100 (Routine)
San Juan L M Marin Intl AP	Puerto Rico [United States]	Record low maximum temperature	28.9 C (84.0 F)	31 of 100 (Routine)
Alicante	Spain	Record high maximum temperature	38.5 C (101.3 F)	31 of 100 (Routine)

Counts by Type and Timescale

538 records

Records set or tied on 17 August 2025 by type: Highest daily maximum 130, Lowest daily maximum 38, Highest daily minimum 243, Lowest daily minimum 36, Heaviest daily rainfall 91.

Records on 17 August 2025 by type
Record type	Records
Highest daily maximum	130
Lowest daily maximum	38
Highest daily minimum	243
Lowest daily minimum	36
Heaviest daily rainfall	91
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 2025 by timescale: all-time 2, monthly 7, daily 529.

How Much Records Were Beaten By

415 broken records

Margins by which the 415 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 217.7. Ties are not counted.

Top 20 by Significance

17 August 2025

Top 20 records on 17 August 2025 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 2025	De Smet, US	daily rain	86.1 mm (3.4 in)	58.2 mm (2.3 in)	112 years	80 of 100 (Exceptional)
17 August 2025	Ainsworth, US	daily rain	70.9 mm (2.8 in)	50.3 mm (2.0 in)	99 years	79 of 100 (Major)
17 August 2025	Togwotee Pass, US	all-time rain	55.9 mm (2.2 in)	12.7 mm (0.5 in)	39 years	61 of 100 (Major)
17 August 2025	Decorah, US	daily rain	73.7 mm (2.9 in)	33.3 mm (1.3 in)	87 years	57 of 100 (Notable)
17 August 2025	Grand Meadow, US	daily rain	160.0 mm (6.3 in)	120.9 mm (4.8 in)	24 years	57 of 100 (Notable)
17 August 2025	Vinh, VN	daily rain	266.7 mm (10.5 in)	217.7 mm (8.6 in)	28 years	52 of 100 (Notable)
17 August 2025	Moundou, TD	daily low min	16.2 C (61.2 F)	2.8 C (5.0 F)	60 years	50 of 100 (Notable)
17 August 2025	Waseca S Rsch & Outreach Ctr, US	monthly rain	157.2 mm (6.2 in)	20.0 mm (0.8 in)	62 years	50 of 100 (Notable)
17 August 2025	Custer, US	daily rain	35.6 mm (1.4 in)	10.5 mm (0.4 in)	112 years	50 of 100 (Notable)
17 August 2025	Lamberton SW Rsch & Outreach C, US	daily rain	87.9 mm (3.5 in)	48.8 mm (1.9 in)	8 years	48 of 100 (Notable)
17 August 2025	Eureka, US	daily rain	39.6 mm (1.6 in)	14.2 mm (0.6 in)	84 years	48 of 100 (Notable)
17 August 2025	Wallace, US	daily high min	22.2 C (72.0 F)	2.2 C (4.0 F)	116 years	47 of 100 (Notable)
17 August 2025	W Lafayette 6 NW, US	daily high min	26.1 C (79.0 F)	2.2 C (4.0 F)	112 years	45 of 100 (Notable)
17 August 2025	Perpignan, FR	daily high min	29.2 C (84.6 F)	3.2 C (5.8 F)	76 years	44 of 100 (Notable)
17 August 2025	Emmetsburg, US	monthly high min	25.6 C (78.1 F)	0.6 C (1.1 F)	76 years	44 of 100 (Notable)
17 August 2025	Perpignan, FR	daily high max	39.5 C (103.1 F)	3.5 C (6.3 F)	76 years	43 of 100 (Notable)
17 August 2025	Huesca, ES	daily high min	25.1 C (77.2 F)	3.5 C (6.3 F)	82 years	43 of 100 (Notable)
17 August 2025	Ashland, US	daily high min	17.8 C (64.0 F)	1.1 C (2.0 F)	124 years	43 of 100 (Notable)
17 August 2025	Friendship, US	daily rain	41.4 mm (1.6 in)	19.8 mm (0.8 in)	76 years	43 of 100 (Notable)
17 August 2025	Canton 4N, US	daily high min	24.4 C (75.9 F)	0.5 C (0.9 F)	129 years	42 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 2025

Records set or tied on this calendar date in each year from 1797 to 2025. 2025 had 538 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 2025-08-17: 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 50	411
50 to 100	2
100 to 150	1
150 to 200	0
200 to 250	1