Weather Records on 18 August 2015

880 weather records were set or tied worldwide on 18 August 2015. Highest significance: Lead, US.

Key Facts for 18 August 2015

On 18 August 2015, 880 weather records were set or tied at long-record stations worldwide.
352 were record highs and 265 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 15 monthly and 864 daily.
Lead set a daily record precipitation of 56.6 mm (2.2 in) on 18 August 2015.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 438 records.

Record Map

880 stations

880 station records on 18 August 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lead	United States	Record daily precipitation	56.6 mm (2.2 in)	80 of 100 (Exceptional)
Perm	Russia	Record daily precipitation	43.6 mm (1.7 in)	74 of 100 (Major)
Gadag	India	Record daily precipitation	75.7 mm (3.0 in)	71 of 100 (Major)
Hillston (Cowl Cowl)	Australia	Record daily precipitation	31.0 mm (1.2 in)	70 of 100 (Major)
Manati 2 E	Puerto Rico [United States]	Record low minimum temperature	15.6 C (60.1 F)	66 of 100 (Major)
Bowling Green Wwtp	United States	Record daily precipitation	77.2 mm (3.0 in)	66 of 100 (Major)
Kalaupapa 563	United States	Record daily precipitation	35.8 mm (1.4 in)	64 of 100 (Major)
Harlan	United States	Record daily precipitation	86.9 mm (3.4 in)	62 of 100 (Major)
Huron Rgnl AP	United States	Record daily precipitation	75.4 mm (3.0 in)	62 of 100 (Major)
David City 4E	United States	Record daily precipitation	60.5 mm (2.4 in)	60 of 100 (Major)
Spearfish	United States	Record daily precipitation	55.9 mm (2.2 in)	58 of 100 (Notable)
Newell	United States	Record daily precipitation	34.3 mm (1.4 in)	57 of 100 (Notable)
Varazdin	Croatia	Record daily precipitation	70.7 mm (2.8 in)	56 of 100 (Notable)
Belle Fourche	United States	Record daily precipitation	37.3 mm (1.5 in)	56 of 100 (Notable)
Budapest/Pestszentlorinc	Hungary	Record daily precipitation	66.0 mm (2.6 in)	55 of 100 (Notable)
Cherokee	United States	Record daily precipitation	56.1 mm (2.2 in)	54 of 100 (Notable)
Ridgeway 1 S	United States	Record daily precipitation	45.5 mm (1.8 in)	54 of 100 (Notable)
Waiahole 837	United States	Record daily precipitation	127.0 mm (5.0 in)	54 of 100 (Notable)
Lodgepole	United States	Record low maximum temperature	16.1 C (61.0 F)	53 of 100 (Notable)
Waimanalo Exp F 795.1	United States	Record daily precipitation	29.0 mm (1.1 in)	53 of 100 (Notable)
Canby	United States	Record daily precipitation	94.0 mm (3.7 in)	52 of 100 (Notable)
Lyons	United States	Record daily precipitation	57.2 mm (2.3 in)	51 of 100 (Notable)
Liberal	United States	Record daily precipitation	57.2 mm (2.3 in)	50 of 100 (Notable)
Winfield 2 SW	United States	Record daily precipitation	66.0 mm (2.6 in)	49 of 100 (Notable)
Belltower	United States	Record daily precipitation	43.2 mm (1.7 in)	49 of 100 (Notable)
Madrid	United States	Record low maximum temperature	18.3 C (64.9 F)	49 of 100 (Notable)
Bowdle	United States	Record daily precipitation	33.3 mm (1.3 in)	49 of 100 (Notable)
Cuthbert	United States	Record low minimum temperature	12.8 C (55.0 F)	48 of 100 (Notable)
Iroquois	United States	Record daily precipitation	71.6 mm (2.8 in)	48 of 100 (Notable)
Ravenna	United States	Record low maximum temperature	17.8 C (64.0 F)	47 of 100 (Notable)
Franklin Sewage Plt	United States	Record low maximum temperature	22.2 C (72.0 F)	47 of 100 (Notable)
Watertown Rgnl AP	United States	Record daily precipitation	78.2 mm (3.1 in)	47 of 100 (Notable)
Debrecen	Hungary	Record daily precipitation	37.1 mm (1.5 in)	46 of 100 (Notable)
Glazov	Russia	Record daily precipitation	27.9 mm (1.1 in)	46 of 100 (Notable)
Pali Golf Course 788.1	United States	Record daily precipitation	46.2 mm (1.8 in)	46 of 100 (Notable)
Huron Rgnl AP	United States	Record low maximum temperature	15.0 C (59.0 F)	46 of 100 (Notable)
Ibiza/Escodola	Spain	Record daily precipitation	36.0 mm (1.4 in)	45 of 100 (Notable)
Ofunato	Japan	Record daily precipitation	97.0 mm (3.8 in)	44 of 100 (Notable)
Vernon	United States	Record daily precipitation	73.7 mm (2.9 in)	44 of 100 (Notable)
Purdum	United States	Record low maximum temperature	15.6 C (60.1 F)	44 of 100 (Notable)
Springerville	United States	Record high minimum temperature	17.8 C (64.0 F)	43 of 100 (Notable)
Collegeville St John's	United States	Record low minimum temperature	5.6 C (42.1 F)	43 of 100 (Notable)
Minden	United States	Record low maximum temperature	18.3 C (64.9 F)	43 of 100 (Notable)
Oelrichs	United States	Record low maximum temperature	14.4 C (57.9 F)	43 of 100 (Notable)
Upton	United States	Record daily precipitation	27.2 mm (1.1 in)	43 of 100 (Notable)
Pelican	United States	Record daily precipitation	143.8 mm (5.7 in)	43 of 100 (Notable)
Verhoture	Russia	Record daily precipitation	37.7 mm (1.5 in)	42 of 100 (Notable)
Julesburg	United States	Record low maximum temperature	16.7 C (62.1 F)	42 of 100 (Notable)
Morris 1NW	United States	Record daily precipitation	50.3 mm (2.0 in)	42 of 100 (Notable)
Pascagoula 3 NE	United States	Record low maximum temperature	28.3 C (82.9 F)	42 of 100 (Notable)
Roundup	United States	Record low maximum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Ewing	United States	Record low maximum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Minatare Dam (Usbr)	United States	Record low maximum temperature	16.7 C (62.1 F)	42 of 100 (Notable)
Wessington Springs	United States	Record low maximum temperature	19.4 C (66.9 F)	42 of 100 (Notable)
Hanford 1 S	United States	Record high maximum temperature	42.2 C (108.0 F)	41 of 100 (Notable)
Melstone	United States	Record low maximum temperature	18.9 C (66.0 F)	41 of 100 (Notable)
Ft Robinson	United States	Record low maximum temperature	13.9 C (57.0 F)	41 of 100 (Notable)
Belle Fourche	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Wessington 2SE	United States	Record daily precipitation	78.7 mm (3.1 in)	41 of 100 (Notable)
Leusi	Russia	Record daily precipitation	34.8 mm (1.4 in)	40 of 100 (Notable)

Counts by Type and Timescale

880 records

Records set or tied on 18 August 2015 by type: Highest daily maximum 186, Lowest daily maximum 206, Highest daily minimum 166, Lowest daily minimum 59, Heaviest daily rainfall 263.

Records on 18 August 2015 by type
Record type	Records
Highest daily maximum	186
Lowest daily maximum	206
Highest daily minimum	166
Lowest daily minimum	59
Heaviest daily rainfall	263
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 2015 by timescale: all-time 1, monthly 15, daily 864.

How Much Records Were Beaten By

726 broken records

Margins by which the 726 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 73.2. Ties are not counted.

Top 20 by Significance

18 August 2015

Top 20 records on 18 August 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 2015	Lead, US	daily rain	56.6 mm (2.2 in)	39.1 mm (1.5 in)	102 years	80 of 100 (Exceptional)
18 August 2015	Perm, RU	daily rain	43.6 mm (1.7 in)	21.8 mm (0.9 in)	129 years	74 of 100 (Major)
18 August 2015	Gadag, IN	daily rain	75.7 mm (3.0 in)	57.4 mm (2.3 in)	76 years	71 of 100 (Major)
18 August 2015	Hillston (Cowl Cowl), AU	daily rain	31.0 mm (1.2 in)	21.3 mm (0.8 in)	108 years	70 of 100 (Major)
18 August 2015	Manati 2 E, PR	daily low min	15.6 C (60.1 F)	3.8 C (6.8 F)	84 years	66 of 100 (Major)
18 August 2015	Bowling Green Wwtp, US	daily rain	77.2 mm (3.0 in)	30.2 mm (1.2 in)	113 years	66 of 100 (Major)
18 August 2015	Kalaupapa 563, US	daily rain	35.8 mm (1.4 in)	25.4 mm (1.0 in)	81 years	64 of 100 (Major)
18 August 2015	Harlan, US	daily rain	86.9 mm (3.4 in)	46.3 mm (1.8 in)	77 years	62 of 100 (Major)
18 August 2015	Huron Rgnl AP, US	daily rain	75.4 mm (3.0 in)	22.3 mm (0.9 in)	110 years	62 of 100 (Major)
18 August 2015	David City 4E, US	daily rain	60.5 mm (2.4 in)	30.0 mm (1.2 in)	109 years	60 of 100 (Major)
18 August 2015	Spearfish, US	daily rain	55.9 mm (2.2 in)	31.5 mm (1.2 in)	42 years	58 of 100 (Notable)
18 August 2015	Newell, US	daily rain	34.3 mm (1.4 in)	21.9 mm (0.9 in)	58 years	57 of 100 (Notable)
18 August 2015	Varazdin, HR	daily rain	70.7 mm (2.8 in)	38.5 mm (1.5 in)	61 years	56 of 100 (Notable)
18 August 2015	Belle Fourche, US	daily rain	37.3 mm (1.5 in)	21.0 mm (0.8 in)	65 years	56 of 100 (Notable)
18 August 2015	Budapest/Pestszentlorinc, HU	daily rain	66.0 mm (2.6 in)	58.9 mm (2.3 in)	36 years	55 of 100 (Notable)
18 August 2015	Cherokee, US	daily rain	56.1 mm (2.2 in)	32.7 mm (1.3 in)	77 years	54 of 100 (Notable)
18 August 2015	Ridgeway 1 S, US	daily rain	45.5 mm (1.8 in)	29.5 mm (1.2 in)	57 years	54 of 100 (Notable)
18 August 2015	Waiahole 837, US	daily rain	127.0 mm (5.0 in)	61.7 mm (2.4 in)	48 years	54 of 100 (Notable)
18 August 2015	Lodgepole, US	daily low max	16.1 C (61.0 F)	5.6 C (10.1 F)	118 years	53 of 100 (Notable)
18 August 2015	Waimanalo Exp F 795.1, US	daily rain	29.0 mm (1.1 in)	25.4 mm (1.0 in)	32 years	53 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 880 records.

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

Records on 08-18 in each year
Year	Records
1797	2
1805	1
1816	1
1827	1
1829	1
1830	1
1833	1
1841	1
1844	1
1845	3
1846	1
1847	1
1849	1
1851	1
1852	1
1853	1
1854	2
1855	1
1856	1
1861	1
1864	2
1866	1
1868	2
1869	1
1870	2
1872	1
1873	1
1875	3
1876	1
1878	1
1879	2
1883	3
1885	3
1886	3
1887	3
1888	2
1889	1
1890	1
1891	2
1892	6
1893	4
1894	4
1895	1
1898	4
1899	6
1900	2
1901	10
1902	8
1903	6
1904	8
1905	10
1906	40
1907	7
1908	21
1909	24
1910	16
1911	11
1912	21
1913	43
1914	37
1915	60
1916	71
1917	70
1918	53
1919	34
1920	51
1921	39
1922	129
1923	90
1924	225
1925	300
1926	168
1927	269
1928	141
1929	181
1930	150
1931	241
1932	382
1933	431
1934	638
1935	424
1936	766
1937	308
1938	243
1939	381
1940	434
1941	467
1942	333
1943	738
1944	325
1945	400
1946	416
1947	958
1948	315
1949	393
1950	683
1951	355
1952	405
1953	323
1954	622
1955	795
1956	580
1957	380
1958	580
1959	537
1960	599
1961	415
1962	428
1963	760
1964	443
1965	525
1966	573
1967	623
1968	795
1969	530
1970	597
1971	381
1972	493
1973	734
1974	639
1975	844
1976	917
1977	1,112
1978	854
1979	1,309
1980	771
1981	1,386
1982	563
1983	1,420
1984	600
1985	765
1986	861
1987	1,609
1988	1,351
1989	952
1990	920
1991	533
1992	1,497
1993	706
1994	1,027
1995	1,882
1996	760
1997	1,191
1998	923
1999	888
2000	1,183
2001	1,036
2002	1,306
2003	860
2004	1,050
2005	865
2006	842
2007	1,116
2008	1,265
2009	839
2010	1,167
2011	1,239
2012	1,247
2013	752
2014	751
2015	880
2016	704
2017	565
2018	462
2019	615
2020	1,541
2021	1,118
2022	1,237
2023	1,094
2024	696
2025	455
2026	545

Download the Data

Data for records on 2015-08-18: 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	621
10 to 20	54
20 to 30	25
30 to 40	17
40 to 50	3
50 to 60	3
60 to 70	1
70 to 80	2