Weather Records on 17 August 1997

1,544 weather records were set or tied worldwide on 17 August 1997. Highest significance: Delaware, US.

Key Facts for 17 August 1997

On 17 August 1997, 1,544 weather records were set or tied at long-record stations worldwide.
889 were record highs and 322 were record lows, counting maximum and minimum temperature.
By timescale, 15 were all-time records, 62 monthly and 1,467 daily.
Delaware set a daily record precipitation of 74.2 mm (2.9 in) on 17 August 1997.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 467 records.

Record Map

1,544 stations

1,544 station records on 17 August 1997 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 1997: highest significance records shown on the map
Station	Country	Type	Value	Significance
Delaware	United States	Record daily precipitation	74.2 mm (2.9 in)	75 of 100 (Major)
Uppsala_Aut	Sweden	Record daily precipitation	104.4 mm (4.1 in)	70 of 100 (Major)
Centralia	United States	Record daily precipitation	77.5 mm (3.1 in)	67 of 100 (Major)
Waterloo 2 NW	United States	Record daily precipitation	119.4 mm (4.7 in)	66 of 100 (Major)
Pontiac	United States	Record daily precipitation	83.8 mm (3.3 in)	64 of 100 (Major)
Ft Sumner	United States	Record daily precipitation	83.8 mm (3.3 in)	63 of 100 (Major)
Paulding	United States	Record daily precipitation	86.4 mm (3.4 in)	63 of 100 (Major)
McPherson	United States	Record daily precipitation	66.0 mm (2.6 in)	62 of 100 (Major)
Prospect	United States	Record daily precipitation	59.7 mm (2.4 in)	60 of 100 (Major)
Three Rivers	United States	Record daily precipitation	81.8 mm (3.2 in)	56 of 100 (Notable)
Dalyup Park	Australia	Record daily precipitation	29.4 mm (1.2 in)	55 of 100 (Notable)
Milan	Italy	Record daily precipitation	48.2 mm (1.9 in)	55 of 100 (Notable)
Ayutla	Mexico	Record low minimum temperature	11.7 C (53.1 F)	55 of 100 (Notable)
Warren 3 S	United States	Record daily precipitation	66.3 mm (2.6 in)	55 of 100 (Notable)
Weston	United States	Record daily precipitation	62.2 mm (2.4 in)	55 of 100 (Notable)
Defiance	United States	Record daily precipitation	75.4 mm (3.0 in)	54 of 100 (Notable)
Kenton	United States	Record daily precipitation	63.5 mm (2.5 in)	54 of 100 (Notable)
Rantoul	United States	Record daily precipitation	67.6 mm (2.7 in)	54 of 100 (Notable)
Upper Sandusky	United States	Record daily precipitation	41.4 mm (1.6 in)	53 of 100 (Notable)
Monmouth	United States	Record daily precipitation	72.6 mm (2.9 in)	52 of 100 (Notable)
Sherman	United States	Record daily precipitation	78.7 mm (3.1 in)	52 of 100 (Notable)
Im. Poliny Osipenko	Russia	Record daily precipitation	56.8 mm (2.2 in)	51 of 100 (Notable)
Lacon	United States	Record daily precipitation	59.7 mm (2.4 in)	51 of 100 (Notable)
Beverly Stp	United States	Record daily precipitation	38.9 mm (1.5 in)	51 of 100 (Notable)
Ermsdorf	Luxembourg	Record daily precipitation	43.3 mm (1.7 in)	50 of 100 (Notable)
Champaign 3S	United States	Record daily precipitation	75.9 mm (3.0 in)	49 of 100 (Notable)
Monticello	United States	Record high minimum temperature	26.7 C (80.1 F)	48 of 100 (Notable)
Downing	United States	Record daily precipitation	42.2 mm (1.7 in)	48 of 100 (Notable)
El Reno 1 N	United States	Record low minimum temperature	11.1 C (52.0 F)	48 of 100 (Notable)
Creston	United States	Record daily precipitation	56.6 mm (2.2 in)	48 of 100 (Notable)
Arlanda	Sweden	Record daily precipitation	33.6 mm (1.3 in)	46 of 100 (Notable)
Bentley	United States	Record daily precipitation	64.8 mm (2.6 in)	46 of 100 (Notable)
Pana	United States	Record daily precipitation	50.3 mm (2.0 in)	46 of 100 (Notable)
Marysville	United States	Record daily precipitation	42.4 mm (1.7 in)	46 of 100 (Notable)
Renovo	United States	Record daily precipitation	42.7 mm (1.7 in)	46 of 100 (Notable)
Tecolutla	Mexico	Record high maximum temperature	41.7 C (107.1 F)	45 of 100 (Notable)
Biloxi	United States	Record high minimum temperature	28.9 C (84.0 F)	45 of 100 (Notable)
Columbus-Valley Crossing	United States	Record daily precipitation	71.4 mm (2.8 in)	45 of 100 (Notable)
Hot Springs	United States	Record low maximum temperature	17.8 C (64.0 F)	45 of 100 (Notable)
Muhldorf	Germany	Record daily precipitation	47.7 mm (1.9 in)	44 of 100 (Notable)
Schwaigermoos	Germany	Record daily precipitation	44.6 mm (1.8 in)	44 of 100 (Notable)
Lowestoft	United Kingdom	Record high minimum temperature	18.1 C (64.6 F)	44 of 100 (Notable)
Kewanee 1E	United States	Record daily precipitation	71.6 mm (2.8 in)	44 of 100 (Notable)
San Saba	United States	Record high minimum temperature	26.1 C (79.0 F)	44 of 100 (Notable)
Atlantic City Marina	United States	Record high maximum temperature	36.1 C (97.0 F)	44 of 100 (Notable)
Landshut	Germany	Record daily precipitation	36.1 mm (1.4 in)	43 of 100 (Notable)
Piqua	United States	Record daily precipitation	32.5 mm (1.3 in)	43 of 100 (Notable)
Ashland	United States	Record high minimum temperature	24.4 C (75.9 F)	43 of 100 (Notable)
Mt Vernon	United States	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Axtell	United States	Record daily precipitation	68.6 mm (2.7 in)	42 of 100 (Notable)
Hutchinson 1 N	United States	Record low maximum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Claremore 2 ENE	United States	Record daily precipitation	63.5 mm (2.5 in)	42 of 100 (Notable)
Wrixum/Fohr	Germany	Record high maximum temperature	27.0 C (80.6 F)	41 of 100 (Notable)
Altotonga	Mexico	Record low maximum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Ulricehamn	Sweden	Record high minimum temperature	16.8 C (62.2 F)	41 of 100 (Notable)
Ultuna	Sweden	Record daily precipitation	31.5 mm (1.2 in)	41 of 100 (Notable)
Uppsala_Aut	Sweden	Record high maximum temperature	29.0 C (84.2 F)	41 of 100 (Notable)
Algona	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Kanopolis Lake	United States	Record daily precipitation	68.1 mm (2.7 in)	41 of 100 (Notable)
Dalecarlia Rsvr	United States	Record high maximum temperature	40.6 C (105.1 F)	41 of 100 (Notable)

Counts by Type and Timescale

1,544 records

Records set or tied on 17 August 1997 by type: Highest daily maximum 307, Lowest daily maximum 214, Highest daily minimum 582, Lowest daily minimum 108, Heaviest daily rainfall 333.

Records on 17 August 1997 by type
Record type	Records
Highest daily maximum	307
Lowest daily maximum	214
Highest daily minimum	582
Lowest daily minimum	108
Heaviest daily rainfall	333
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 1997 by timescale: all-time 15, monthly 62, daily 1,467.

How Much Records Were Beaten By

1,121 broken records

Margins by which the 1,121 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.7. Ties are not counted.

Top 20 by Significance

17 August 1997

Top 20 records on 17 August 1997 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 1997	Delaware, US	daily rain	74.2 mm (2.9 in)	49.6 mm (2.0 in)	86 years	75 of 100 (Major)
17 August 1997	Uppsala_Aut, SE	all-time rain	104.4 mm (4.1 in)	44.0 mm (1.7 in)	0 years	70 of 100 (Major)
17 August 1997	Centralia, US	daily rain	77.5 mm (3.1 in)	48.5 mm (1.9 in)	87 years	67 of 100 (Major)
17 August 1997	Waterloo 2 NW, US	monthly rain	119.4 mm (4.7 in)	44.0 mm (1.7 in)	46 years	66 of 100 (Major)
17 August 1997	Pontiac, US	daily rain	83.8 mm (3.3 in)	55.4 mm (2.2 in)	51 years	64 of 100 (Major)
17 August 1997	Ft Sumner, US	daily rain	83.8 mm (3.3 in)	40.6 mm (1.6 in)	87 years	63 of 100 (Major)
17 August 1997	Paulding, US	monthly rain	86.4 mm (3.4 in)	21.9 mm (0.9 in)	71 years	63 of 100 (Major)
17 August 1997	McPherson, US	daily rain	66.0 mm (2.6 in)	35.0 mm (1.4 in)	94 years	62 of 100 (Major)
17 August 1997	Prospect, US	daily rain	59.7 mm (2.4 in)	45.5 mm (1.8 in)	55 years	60 of 100 (Major)
17 August 1997	Three Rivers, US	daily rain	81.8 mm (3.2 in)	54.9 mm (2.2 in)	23 years	56 of 100 (Notable)
17 August 1997	Dalyup Park, AU	daily rain	29.4 mm (1.2 in)	15.2 mm (0.6 in)	80 years	55 of 100 (Notable)
17 August 1997	Milan, IT	daily rain	48.2 mm (1.9 in)	24.2 mm (1.0 in)	102 years	55 of 100 (Notable)
17 August 1997	Ayutla, MX	daily low min	11.7 C (53.1 F)	6.1 C (11.0 F)	36 years	55 of 100 (Notable)
17 August 1997	Warren 3 S, US	daily rain	66.3 mm (2.6 in)	33.3 mm (1.3 in)	51 years	55 of 100 (Notable)
17 August 1997	Weston, US	daily rain	62.2 mm (2.4 in)	31.7 mm (1.2 in)	71 years	55 of 100 (Notable)
17 August 1997	Defiance, US	daily rain	75.4 mm (3.0 in)	40.6 mm (1.6 in)	23 years	54 of 100 (Notable)
17 August 1997	Kenton, US	daily rain	63.5 mm (2.5 in)	33.8 mm (1.3 in)	48 years	54 of 100 (Notable)
17 August 1997	Rantoul, US	daily rain	67.6 mm (2.7 in)	25.9 mm (1.0 in)	96 years	54 of 100 (Notable)
17 August 1997	Upper Sandusky, US	daily rain	41.4 mm (1.6 in)	19.8 mm (0.8 in)	88 years	53 of 100 (Notable)
17 August 1997	Monmouth, US	daily rain	72.6 mm (2.9 in)	36.5 mm (1.4 in)	58 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 1997

Records set or tied on this calendar date in each year from 1797 to 1997. 1997 had 1,544 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 1997-08-17: 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	950
10 to 20	91
20 to 30	41
30 to 40	21
40 to 50	13
50 to 60	4
60 to 70	1