Weather Records on 17 July 2018

750 weather records were set or tied worldwide on 17 July 2018. Highest significance: Mc Cook, US.

Key Facts for 17 July 2018

On 17 July 2018, 750 weather records were set or tied at long-record stations worldwide.
525 were record highs and 37 were record lows, counting maximum and minimum temperature.
By timescale, 20 were all-time records, 13 monthly and 717 daily.
Mc Cook set a daily record precipitation of 74.2 mm (2.9 in) on 17 July 2018.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 443 records.

Record Map

750 stations

750 station records on 17 July 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 July 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mc Cook	United States	Record daily precipitation	74.2 mm (2.9 in)	71 of 100 (Major)
Rajkot	India	Record daily precipitation	189.0 mm (7.4 in)	67 of 100 (Major)
Lankaran	Azerbaijan	Record daily precipitation	99.1 mm (3.9 in)	65 of 100 (Major)
Wallace 2W	United States	Record daily precipitation	66.0 mm (2.6 in)	61 of 100 (Major)
Freeville 1 NE	United States	Record daily precipitation	53.3 mm (2.1 in)	61 of 100 (Major)
Sodankyla AWS	Finland	Record high maximum temperature	31.8 C (89.2 F)	60 of 100 (Major)
Kolhapur	India	Record daily precipitation	93.0 mm (3.7 in)	59 of 100 (Notable)
Danbury	United States	Record daily precipitation	55.4 mm (2.2 in)	57 of 100 (Notable)
Rtiscevo	Russia	Record daily precipitation	35.1 mm (1.4 in)	56 of 100 (Notable)
Khlong Yai	Thailand	Record daily precipitation	435.4 mm (17.1 in)	56 of 100 (Notable)
Whitesville 1N	United States	Record daily precipitation	69.9 mm (2.8 in)	56 of 100 (Notable)
Cortez	United States	Record daily precipitation	41.7 mm (1.6 in)	55 of 100 (Notable)
New Haven Tweed AP	United States	Record daily precipitation	50.0 mm (2.0 in)	55 of 100 (Notable)
Mt Vernon	United States	Record daily precipitation	69.9 mm (2.8 in)	54 of 100 (Notable)
Cattaraugus	United States	Record daily precipitation	36.3 mm (1.4 in)	53 of 100 (Notable)
Trenton Falls	United States	Record daily precipitation	47.0 mm (1.9 in)	53 of 100 (Notable)
Bhaunagar	India	Record daily precipitation	65.0 mm (2.6 in)	52 of 100 (Notable)
Chatsworth 2	United States	Record daily precipitation	138.4 mm (5.4 in)	52 of 100 (Notable)
Boston	United States	Record daily precipitation	68.1 mm (2.7 in)	52 of 100 (Notable)
Rylsk	Russia	Record daily precipitation	56.5 mm (2.2 in)	51 of 100 (Notable)
Manchester AP	United States	Record daily precipitation	80.5 mm (3.2 in)	51 of 100 (Notable)
Moundou	Chad	Record low minimum temperature	17.0 C (62.6 F)	50 of 100 (Notable)
Imperial	United States	Record daily precipitation	41.1 mm (1.6 in)	49 of 100 (Notable)
Cumbres Trestle	United States	Record daily precipitation	33.0 mm (1.3 in)	49 of 100 (Notable)
Hartford Brainard Fld	United States	Record daily precipitation	52.8 mm (2.1 in)	49 of 100 (Notable)
Antichan	France	Record daily precipitation	51.8 mm (2.0 in)	48 of 100 (Notable)
Agate 3 E	United States	Record daily precipitation	48.8 mm (1.9 in)	48 of 100 (Notable)
Sherburne	United States	Record daily precipitation	40.4 mm (1.6 in)	48 of 100 (Notable)
Falls City 2 SSW	United States	Record high maximum temperature	38.9 C (102.0 F)	48 of 100 (Notable)
Cap Cepet	France	Record daily precipitation	27.7 mm (1.1 in)	47 of 100 (Notable)
Mahabaleshwar	India	Record daily precipitation	270.0 mm (10.6 in)	47 of 100 (Notable)
Elizabeth City	United States	Record high minimum temperature	28.9 C (84.0 F)	47 of 100 (Notable)
Prince Gallitzin Sp	United States	Record daily precipitation	50.3 mm (2.0 in)	47 of 100 (Notable)
Brooklet 1 W	United States	Record daily precipitation	75.4 mm (3.0 in)	46 of 100 (Notable)
New London Lock #22	United States	Record daily precipitation	29.0 mm (1.1 in)	46 of 100 (Notable)
Koigorodok	Russia	Record daily precipitation	38.4 mm (1.5 in)	45 of 100 (Notable)
Karlshamn	Sweden	Record high maximum temperature	30.7 C (87.3 F)	45 of 100 (Notable)
Uppsala_Aut	Sweden	Record high maximum temperature	33.4 C (92.1 F)	45 of 100 (Notable)
Canandaigua 3 S	United States	Record daily precipitation	30.0 mm (1.2 in)	45 of 100 (Notable)
Mukdahan	Thailand	Record daily precipitation	137.9 mm (5.4 in)	44 of 100 (Notable)
Sidney 6NNW	United States	Record daily precipitation	48.3 mm (1.9 in)	44 of 100 (Notable)
Bedford Hanscom Fld	United States	Record daily precipitation	48.5 mm (1.9 in)	44 of 100 (Notable)
Baltimore-Washington Intl AP	United States	Record daily precipitation	85.1 mm (3.4 in)	44 of 100 (Notable)
Tribsees	Germany	Record daily precipitation	31.8 mm (1.3 in)	43 of 100 (Notable)
Visby_Flygplats	Sweden	Record high maximum temperature	31.0 C (87.8 F)	43 of 100 (Notable)
Jasper 1 NNW	United States	Record daily precipitation	50.5 mm (2.0 in)	43 of 100 (Notable)
Phoenixville 1 E	United States	Record daily precipitation	66.3 mm (2.6 in)	43 of 100 (Notable)
Worcester	United States	Record daily precipitation	67.8 mm (2.7 in)	43 of 100 (Notable)
Adelaide West Terrace	Australia	Record high minimum temperature	11.7 C (53.1 F)	42 of 100 (Notable)
Ulricehamn	Sweden	Record high minimum temperature	17.6 C (63.7 F)	42 of 100 (Notable)
Kiruna_Flygplats	Sweden	Record high maximum temperature	29.5 C (85.1 F)	42 of 100 (Notable)
Waverly	United States	Record high maximum temperature	37.2 C (99.0 F)	42 of 100 (Notable)
Lima Wwtp	United States	Record daily precipitation	35.8 mm (1.4 in)	42 of 100 (Notable)
Washington Reagan Natl AP	United States	Record daily precipitation	70.9 mm (2.8 in)	42 of 100 (Notable)
Sihccajavri	Norway	Record high maximum temperature	29.2 C (84.6 F)	41 of 100 (Notable)
Tuapse	Russia	Record daily precipitation	86.0 mm (3.4 in)	41 of 100 (Notable)
Allegany Sp	United States	Record daily precipitation	39.6 mm (1.6 in)	41 of 100 (Notable)
Igor I Sikorsky Mem AP	United States	Record daily precipitation	48.8 mm (1.9 in)	41 of 100 (Notable)
Kuusiku	Estonia	Record high maximum temperature	31.7 C (89.1 F)	40 of 100 (Notable)
Savukoski Kk	Finland	Record high maximum temperature	31.5 C (88.7 F)	40 of 100 (Notable)

Counts by Type and Timescale

750 records

Records set or tied on 17 July 2018 by type: Highest daily maximum 298, Lowest daily maximum 18, Highest daily minimum 227, Lowest daily minimum 19, Heaviest daily rainfall 188.

Records on 17 July 2018 by type
Record type	Records
Highest daily maximum	298
Lowest daily maximum	18
Highest daily minimum	227
Lowest daily minimum	19
Heaviest daily rainfall	188
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 2018 by timescale: all-time 20, monthly 13, daily 717.

How Much Records Were Beaten By

616 broken records

Margins by which the 616 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 290.7. Ties are not counted.

Top 20 by Significance

17 July 2018

Top 20 records on 17 July 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 2018	Mc Cook, US	daily rain	74.2 mm (2.9 in)	41.7 mm (1.6 in)	100 years	71 of 100 (Major)
17 July 2018	Rajkot, IN	daily rain	189.0 mm (7.4 in)	124.7 mm (4.9 in)	64 years	67 of 100 (Major)
17 July 2018	Lankaran, AZ	monthly rain	99.1 mm (3.9 in)	15.6 mm (0.6 in)	118 years	65 of 100 (Major)
17 July 2018	Wallace 2W, US	daily rain	66.0 mm (2.6 in)	44.4 mm (1.7 in)	45 years	61 of 100 (Major)
17 July 2018	Freeville 1 NE, US	daily rain	53.3 mm (2.1 in)	32.2 mm (1.3 in)	67 years	61 of 100 (Major)
17 July 2018	Sodankyla AWS, FI	all-time high max	31.8 C (89.2 F)	0.1 C (0.2 F)	104 years	60 of 100 (Major)
17 July 2018	Kolhapur, IN	daily rain	93.0 mm (3.7 in)	42.2 mm (1.7 in)	92 years	59 of 100 (Notable)
17 July 2018	Danbury, US	daily rain	55.4 mm (2.2 in)	41.4 mm (1.6 in)	76 years	57 of 100 (Notable)
17 July 2018	Rtiscevo, RU	daily rain	35.1 mm (1.4 in)	24.6 mm (1.0 in)	28 years	56 of 100 (Notable)
17 July 2018	Khlong Yai, TH	daily rain	435.4 mm (17.1 in)	290.7 mm (11.4 in)	35 years	56 of 100 (Notable)
17 July 2018	Whitesville 1N, US	daily rain	69.9 mm (2.8 in)	39.9 mm (1.6 in)	40 years	56 of 100 (Notable)
17 July 2018	Cortez, US	monthly rain	41.7 mm (1.6 in)	2.8 mm (0.11 in)	106 years	55 of 100 (Notable)
17 July 2018	New Haven Tweed AP, US	daily rain	50.0 mm (2.0 in)	35.0 mm (1.4 in)	68 years	55 of 100 (Notable)
17 July 2018	Mt Vernon, US	daily rain	69.9 mm (2.8 in)	31.8 mm (1.3 in)	76 years	54 of 100 (Notable)
17 July 2018	Cattaraugus, US	daily rain	36.3 mm (1.4 in)	31.7 mm (1.2 in)	49 years	53 of 100 (Notable)
17 July 2018	Trenton Falls, US	daily rain	47.0 mm (1.9 in)	16.8 mm (0.7 in)	107 years	53 of 100 (Notable)
17 July 2018	Bhaunagar, IN	daily rain	65.0 mm (2.6 in)	29.4 mm (1.2 in)	105 years	52 of 100 (Notable)
17 July 2018	Chatsworth 2, US	monthly rain	138.4 mm (5.4 in)	45.9 mm (1.8 in)	16 years	52 of 100 (Notable)
17 July 2018	Boston, US	daily rain	68.1 mm (2.7 in)	39.7 mm (1.6 in)	28 years	52 of 100 (Notable)
17 July 2018	Rylsk, RU	daily rain	56.5 mm (2.2 in)	34.6 mm (1.4 in)	20 years	51 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 2018

Records set or tied on this calendar date in each year from 1793 to 2018. 2018 had 750 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 2018-07-17: 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 50	610
50 to 100	4
100 to 150	1
150 to 200	0
200 to 250	0
250 to 300	1