Weather Records on 17 July 1987

1,388 weather records were set or tied worldwide on 17 July 1987. Highest significance: Den Helder-1, NL.

Key Facts for 17 July 1987

On 17 July 1987, 1,388 weather records were set or tied at long-record stations worldwide.
277 were record highs and 557 were record lows, counting maximum and minimum temperature.
By timescale, 18 were all-time records, 81 monthly and 1,289 daily.
Den Helder-1 set a daily record precipitation of 53.1 mm (2.1 in) on 17 July 1987.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 439 records.

Record Map

1,388 stations

1,388 station records on 17 July 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 July 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Den Helder-1	Netherlands	Record daily precipitation	53.1 mm (2.1 in)	79 of 100 (Major)
Cascade 5 S	United States	Record daily precipitation	38.1 mm (1.5 in)	70 of 100 (Major)
Butte Bert Mooney AP	United States	Record daily precipitation	29.0 mm (1.1 in)	70 of 100 (Major)
Goedereede	Netherlands	Record daily precipitation	96.4 mm (3.8 in)	69 of 100 (Major)
Dirksland	Netherlands	Record daily precipitation	88.6 mm (3.5 in)	67 of 100 (Major)
Poortugaal	Netherlands	Record daily precipitation	95.2 mm (3.7 in)	66 of 100 (Major)
De Haukes	Netherlands	Record daily precipitation	75.5 mm (3.0 in)	66 of 100 (Major)
Schagen	Netherlands	Record daily precipitation	86.4 mm (3.4 in)	65 of 100 (Major)
Kirchdorf/Poel	Germany	Record daily precipitation	46.2 mm (1.8 in)	64 of 100 (Major)
West Terschelling	Netherlands	Record daily precipitation	34.0 mm (1.3 in)	64 of 100 (Major)
Greiz-Dolau	Germany	Record daily precipitation	45.9 mm (1.8 in)	63 of 100 (Major)
Obdam	Netherlands	Record daily precipitation	69.3 mm (2.7 in)	63 of 100 (Major)
Blanco	United States	Record daily precipitation	114.3 mm (4.5 in)	63 of 100 (Major)
Hoorn	Netherlands	Record daily precipitation	64.5 mm (2.5 in)	59 of 100 (Notable)
Summer Lake 1 S	United States	Record daily precipitation	41.1 mm (1.6 in)	59 of 100 (Notable)
Bezenchuk	Russia	Record daily precipitation	44.4 mm (1.7 in)	58 of 100 (Notable)
Hye	United States	Record daily precipitation	132.1 mm (5.2 in)	58 of 100 (Notable)
Marnitz	Germany	Record daily precipitation	50.9 mm (2.0 in)	57 of 100 (Notable)
Tahoka	United States	Record daily precipitation	86.4 mm (3.4 in)	57 of 100 (Notable)
Vermillion 2 SE	United States	Record daily precipitation	66.0 mm (2.6 in)	56 of 100 (Notable)
Noordgouwe	Netherlands	Record daily precipitation	58.3 mm (2.3 in)	55 of 100 (Notable)
Imlay	United States	Record low maximum temperature	17.2 C (63.0 F)	55 of 100 (Notable)
West Beemster	Netherlands	Record daily precipitation	74.8 mm (2.9 in)	54 of 100 (Notable)
Stavoren_1	Netherlands	Record daily precipitation	53.5 mm (2.1 in)	54 of 100 (Notable)
Lakeview	United States	Record daily precipitation	39.6 mm (1.6 in)	54 of 100 (Notable)
Klamath Falls 2 SSW	United States	Record daily precipitation	29.0 mm (1.1 in)	54 of 100 (Notable)
Zinder	Niger	Record daily precipitation	99.1 mm (3.9 in)	53 of 100 (Notable)
Cheyenne 1 WSW	United States	Record daily precipitation	68.1 mm (2.7 in)	53 of 100 (Notable)
Schwerin	Germany	Record daily precipitation	43.4 mm (1.7 in)	52 of 100 (Notable)
Lenzen/Elbe	Germany	Record daily precipitation	42.4 mm (1.7 in)	52 of 100 (Notable)
Sernovodsk	Russia	Record daily precipitation	87.9 mm (3.5 in)	52 of 100 (Notable)
Grouse	United States	Record daily precipitation	40.6 mm (1.6 in)	52 of 100 (Notable)
Roundup	United States	Record daily precipitation	50.5 mm (2.0 in)	52 of 100 (Notable)
Medemblik	Netherlands	Record daily precipitation	46.8 mm (1.8 in)	51 of 100 (Notable)
Window Rock 4 SW	United States	Record daily precipitation	43.7 mm (1.7 in)	51 of 100 (Notable)
May 2SSE	United States	Record daily precipitation	27.9 mm (1.1 in)	51 of 100 (Notable)
Happy Valley Reservoir	Australia	Record daily precipitation	44.2 mm (1.7 in)	50 of 100 (Notable)
Castricum	Netherlands	Record daily precipitation	43.6 mm (1.7 in)	50 of 100 (Notable)
Vlieland_1	Netherlands	Record daily precipitation	28.6 mm (1.1 in)	50 of 100 (Notable)
Tulelake	United States	Record daily precipitation	26.7 mm (1.1 in)	50 of 100 (Notable)
Orovada 3 W	United States	Record low maximum temperature	16.7 C (62.1 F)	50 of 100 (Notable)
Uelzen	Germany	Record daily precipitation	39.4 mm (1.6 in)	49 of 100 (Notable)
Lagunillas	Mexico	Record daily precipitation	72.9 mm (2.9 in)	48 of 100 (Notable)
Plon (See)	Germany	Record daily precipitation	72.1 mm (2.8 in)	47 of 100 (Notable)
De Kooy	Netherlands	Record daily precipitation	49.5 mm (1.9 in)	47 of 100 (Notable)
Glenns Ferry	United States	Record low maximum temperature	18.3 C (64.9 F)	47 of 100 (Notable)
Greensburg	United States	Record low minimum temperature	3.9 C (39.0 F)	47 of 100 (Notable)
Gibson Dam	United States	Record daily precipitation	51.1 mm (2.0 in)	47 of 100 (Notable)
Montello 2NE	United States	Record low maximum temperature	23.9 C (75.0 F)	47 of 100 (Notable)
Crosbyton	United States	Record daily precipitation	62.0 mm (2.4 in)	47 of 100 (Notable)
Darrouzett	United States	Record daily precipitation	71.1 mm (2.8 in)	47 of 100 (Notable)
San Francisco (Smn)	Mexico	Record daily precipitation	38.9 mm (1.5 in)	46 of 100 (Notable)
Jackson	United States	Record daily precipitation	26.7 mm (1.1 in)	46 of 100 (Notable)
Winnemucca AP	United States	Record low maximum temperature	18.9 C (66.0 F)	46 of 100 (Notable)
Great Falls AP	United States	Record daily precipitation	26.2 mm (1.0 in)	46 of 100 (Notable)
Westermarkelsdorf/Fehmarn	Germany	Record daily precipitation	42.0 mm (1.7 in)	45 of 100 (Notable)
Eutin	Germany	Record daily precipitation	64.2 mm (2.5 in)	45 of 100 (Notable)
Flatwillow 4 ENE	United States	Record daily precipitation	36.3 mm (1.4 in)	45 of 100 (Notable)
Sun Rvr 4 S	United States	Record daily precipitation	32.3 mm (1.3 in)	45 of 100 (Notable)
Vernal	United States	Record low maximum temperature	21.7 C (71.1 F)	45 of 100 (Notable)

Counts by Type and Timescale

1,388 records

Records set or tied on 17 July 1987 by type: Highest daily maximum 100, Lowest daily maximum 327, Highest daily minimum 177, Lowest daily minimum 230, Heaviest daily rainfall 554.

Records on 17 July 1987 by type
Record type	Records
Highest daily maximum	100
Lowest daily maximum	327
Highest daily minimum	177
Lowest daily minimum	230
Heaviest daily rainfall	554
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 1987 by timescale: all-time 18, monthly 81, daily 1,289.

How Much Records Were Beaten By

1,128 broken records

Margins by which the 1,128 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 114.5. Ties are not counted.

Top 20 by Significance

17 July 1987

Top 20 records on 17 July 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 1987	Den Helder-1, NL	daily rain	53.1 mm (2.1 in)	35.5 mm (1.4 in)	96 years	79 of 100 (Major)
17 July 1987	Cascade 5 S, US	daily rain	38.1 mm (1.5 in)	25.9 mm (1.0 in)	72 years	70 of 100 (Major)
17 July 1987	Butte Bert Mooney AP, US	daily rain	29.0 mm (1.1 in)	17.6 mm (0.7 in)	84 years	70 of 100 (Major)
17 July 1987	Goedereede, NL	all-time rain	96.4 mm (3.8 in)	41.0 mm (1.6 in)	23 years	69 of 100 (Major)
17 July 1987	Dirksland, NL	all-time rain	88.6 mm (3.5 in)	34.1 mm (1.3 in)	14 years	67 of 100 (Major)
17 July 1987	Poortugaal, NL	all-time rain	95.2 mm (3.7 in)	29.5 mm (1.2 in)	12 years	66 of 100 (Major)
17 July 1987	De Haukes, NL	all-time rain	75.5 mm (3.0 in)	23.5 mm (0.9 in)	26 years	66 of 100 (Major)
17 July 1987	Schagen, NL	all-time rain	86.4 mm (3.4 in)	28.0 mm (1.1 in)	8 years	65 of 100 (Major)
17 July 1987	Kirchdorf/Poel, DE	daily rain	46.2 mm (1.8 in)	16.2 mm (0.6 in)	97 years	64 of 100 (Major)
17 July 1987	West Terschelling, NL	daily rain	34.0 mm (1.3 in)	14.8 mm (0.6 in)	106 years	64 of 100 (Major)
17 July 1987	Greiz-Dolau, DE	daily rain	45.9 mm (1.8 in)	22.9 mm (0.9 in)	87 years	63 of 100 (Major)
17 July 1987	Obdam, NL	all-time rain	69.3 mm (2.7 in)	31.8 mm (1.3 in)	1 year	63 of 100 (Major)
17 July 1987	Blanco, US	daily rain	114.3 mm (4.5 in)	73.2 mm (2.9 in)	50 years	63 of 100 (Major)
17 July 1987	Hoorn, NL	daily rain	64.5 mm (2.5 in)	40.5 mm (1.6 in)	32 years	59 of 100 (Notable)
17 July 1987	Summer Lake 1 S, US	monthly rain	41.1 mm (1.6 in)	18.0 mm (0.7 in)	26 years	59 of 100 (Notable)
17 July 1987	Bezenchuk, RU	daily rain	44.4 mm (1.7 in)	26.9 mm (1.1 in)	42 years	58 of 100 (Notable)
17 July 1987	Hye, US	monthly rain	132.1 mm (5.2 in)	61.0 mm (2.4 in)	14 years	58 of 100 (Notable)
17 July 1987	Marnitz, DE	daily rain	50.9 mm (2.0 in)	20.9 mm (0.8 in)	72 years	57 of 100 (Notable)
17 July 1987	Tahoka, US	daily rain	86.4 mm (3.4 in)	69.6 mm (2.7 in)	33 years	57 of 100 (Notable)
17 July 1987	Vermillion 2 SE, US	daily rain	66.0 mm (2.6 in)	30.7 mm (1.2 in)	84 years	56 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

1793 to 1987

Records set or tied on this calendar date in each year from 1793 to 1987. 1987 had 1,388 records.

Counts for years before the ledger starts come from the same station rules.

Records on 07-17 in each year
Year	Records
1793	1
1798	1
1799	1
1801	2
1802	1
1821	1
1827	1
1833	1
1840	1
1842	1
1845	2
1852	1
1862	1
1863	1
1865	2
1866	1
1871	1
1874	1
1875	2
1877	1
1880	1
1881	2
1882	2
1883	5
1884	1
1887	1
1888	2
1889	4
1890	4
1892	5
1893	3
1894	4
1895	1
1896	3
1897	1
1898	2
1899	4
1900	4
1901	6
1902	6
1903	13
1904	4
1905	9
1906	13
1907	12
1908	32
1909	16
1910	8
1911	52
1912	13
1913	26
1914	67
1915	71
1916	27
1917	62
1918	41
1919	45
1920	50
1921	120
1922	206
1923	105
1924	165
1925	275
1926	251
1927	118
1928	116
1929	154
1930	366
1931	492
1932	293
1933	216
1934	438
1935	245
1936	815
1937	313
1938	303
1939	540
1940	319
1941	386
1942	522
1943	321
1944	236
1945	681
1946	523
1947	505
1948	278
1949	405
1950	645
1951	356
1952	772
1953	557
1954	517
1955	512
1956	608
1957	298
1958	693
1959	631
1960	324
1961	408
1962	421
1963	223
1964	481
1965	753
1966	454
1967	965
1968	707
1969	741
1970	486
1971	790
1972	634
1973	680
1974	691
1975	775
1976	1,041
1977	764
1978	794
1979	642
1980	1,137
1981	628
1982	850
1983	1,120
1984	875
1985	483
1986	1,214
1987	1,388
1988	1,239
1989	1,289
1990	953
1991	763
1992	1,055
1993	956
1994	631
1995	917
1996	911
1997	816
1998	1,031
1999	925
2000	1,166
2001	916
2002	995
2003	1,396
2004	908
2005	1,184
2006	1,509
2007	1,218
2008	508
2009	1,218
2010	965
2011	1,101
2012	934
2013	819
2014	1,456
2015	831
2016	679
2017	398
2018	750
2019	477
2020	515
2021	625
2022	791
2023	1,060
2024	814
2025	966
2026	860

Download the Data

Data for records on 1987-07-17: 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	1,061
20 to 40	54
40 to 60	8
60 to 80	4
80 to 100	0
100 to 120	1