Weather Records on 18 August 1993

706 weather records were set or tied worldwide on 18 August 1993. Highest significance: Moorcroft 3S, US.

Key Facts for 18 August 1993

On 18 August 1993, 706 weather records were set or tied at long-record stations worldwide.
272 were record highs and 264 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 20 monthly and 684 daily.
Moorcroft 3S set an all-time record daily precipitation of 96.5 mm (3.8 in) on 18 August 1993.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 439 records.

Record Map

706 stations

706 station records on 18 August 1993 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 1993: highest significance records shown on the map
Station	Country	Type	Value	Significance
Moorcroft 3S	United States	Record daily precipitation	96.5 mm (3.8 in)	81 of 100 (Exceptional)
Kohala Mis 175.1	United States	Record daily precipitation	89.4 mm (3.5 in)	69 of 100 (Major)
Reboly	Russia	Record daily precipitation	41.2 mm (1.6 in)	61 of 100 (Major)
Mascota (Dge)	Mexico	Record daily precipitation	82.8 mm (3.3 in)	53 of 100 (Notable)
Petrun	Russia	Record daily precipitation	37.0 mm (1.5 in)	51 of 100 (Notable)
Rugozero	Russia	Record daily precipitation	38.0 mm (1.5 in)	50 of 100 (Notable)
Zacualtipan (Smn)	Mexico	Record daily precipitation	120.4 mm (4.7 in)	48 of 100 (Notable)
Gilman	United States	Record daily precipitation	30.2 mm (1.2 in)	48 of 100 (Notable)
Ewing	United States	Record daily precipitation	31.8 mm (1.3 in)	47 of 100 (Notable)
Mascota (Smn)	Mexico	Record daily precipitation	82.8 mm (3.3 in)	46 of 100 (Notable)
Farmington 3NW	United States	Record daily precipitation	50.3 mm (2.0 in)	46 of 100 (Notable)
Bowling Green 1 W	United States	Record daily precipitation	110.5 mm (4.4 in)	44 of 100 (Notable)
Tiririca	Brazil	Record daily precipitation	53.0 mm (2.1 in)	43 of 100 (Notable)
Dover	United States	Record daily precipitation	72.1 mm (2.8 in)	43 of 100 (Notable)
Plauen	Germany	Record low minimum temperature	4.3 C (39.7 F)	42 of 100 (Notable)
Mahackala	Russia	Record low minimum temperature	12.4 C (54.3 F)	42 of 100 (Notable)
South Lyndeboro	United States	Record daily precipitation	53.3 mm (2.1 in)	42 of 100 (Notable)
Rochester Intl AP	United States	Record daily precipitation	51.8 mm (2.0 in)	42 of 100 (Notable)
Inverness 3 SE	United States	Record low minimum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Brassua Dam	United States	Record daily precipitation	36.3 mm (1.4 in)	41 of 100 (Notable)
Kodiak AP	United States	Record daily precipitation	99.6 mm (3.9 in)	41 of 100 (Notable)
Clifton	United States	Record low maximum temperature	29.4 C (84.9 F)	39 of 100 (Notable)
Stratton	United States	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Jackman	United States	Record daily precipitation	39.9 mm (1.6 in)	38 of 100 (Notable)
Carrollton	United States	Record high minimum temperature	23.9 C (75.0 F)	38 of 100 (Notable)
Sofia	Bulgaria	Record high maximum temperature	39.4 C (102.9 F)	37 of 100 (Notable)
Hvar	Croatia	Record high minimum temperature	26.6 C (79.9 F)	36 of 100 (Notable)
Brunswick	United States	Record daily precipitation	58.4 mm (2.3 in)	36 of 100 (Notable)
Rosemount Rsch & Outreach Ctr	United States	Record daily precipitation	62.5 mm (2.5 in)	36 of 100 (Notable)
Young America 1SW	United States	Record daily precipitation	54.9 mm (2.2 in)	36 of 100 (Notable)
Nanchang	China	Record daily precipitation	126.5 mm (5.0 in)	35 of 100 (Notable)
Mora	United States	Record daily precipitation	42.4 mm (1.7 in)	35 of 100 (Notable)
Ellsworth 1E	United States	Record daily precipitation	43.7 mm (1.7 in)	35 of 100 (Notable)
Coloso	Puerto Rico [United States]	Record high maximum temperature	35.0 C (95.0 F)	34 of 100 (Routine)
Alexandria	United States	Record high minimum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Kailua 446	United States	Record high maximum temperature	28.9 C (84.0 F)	33 of 100 (Routine)
Bordeaux-Merignac	France	Record high maximum temperature	34.5 C (94.1 F)	32 of 100 (Routine)
San Bartolo	Mexico	Record low minimum temperature	11.7 C (53.1 F)	32 of 100 (Routine)
Clermont 9 S	United States	Record low minimum temperature	18.9 C (66.0 F)	32 of 100 (Routine)
Lake City	United States	Record daily precipitation	25.4 mm (1.0 in)	32 of 100 (Routine)
Clarkson	United States	Record daily precipitation	34.5 mm (1.4 in)	32 of 100 (Routine)
Banner Elk	United States	Record high minimum temperature	17.2 C (63.0 F)	32 of 100 (Routine)
Dailey 1 SE	United States	Record daily precipitation	41.9 mm (1.6 in)	32 of 100 (Routine)
San Juan Yaee	Mexico	Record low minimum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Ust-Isim	Russia	Record daily precipitation	27.9 mm (1.1 in)	31 of 100 (Routine)
Creston 2 SW	United States	Record daily precipitation	76.7 mm (3.0 in)	31 of 100 (Routine)
Parnu	Estonia	Record low maximum temperature	15.2 C (59.4 F)	30 of 100 (Routine)
Tallinn	Estonia	Record low maximum temperature	13.5 C (56.3 F)	30 of 100 (Routine)
Atlatlahuacan	Mexico	Record daily precipitation	43.9 mm (1.7 in)	30 of 100 (Routine)
Live Oak	United States	Record high maximum temperature	38.3 C (100.9 F)	30 of 100 (Routine)
Gaylord	United States	Record daily precipitation	61.0 mm (2.4 in)	30 of 100 (Routine)
Spencer 6 SSE	United States	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Bridgewater	United States	Record daily precipitation	63.5 mm (2.5 in)	30 of 100 (Routine)
Bernburg/Saale (Nord)	Germany	Record low minimum temperature	6.5 C (43.7 F)	29 of 100 (Routine)
Yurecuaro	Mexico	Record high minimum temperature	18.9 C (66.0 F)	29 of 100 (Routine)
Sanford	United States	Record low minimum temperature	18.3 C (64.9 F)	29 of 100 (Routine)
Haddam	United States	Record daily precipitation	67.3 mm (2.6 in)	29 of 100 (Routine)
Animas 3ESE	United States	Record low maximum temperature	24.4 C (75.9 F)	29 of 100 (Routine)
Dillingham FAA AP	United States	Record daily precipitation	28.7 mm (1.1 in)	29 of 100 (Routine)
Renison Bell	Australia	Record daily precipitation	40.0 mm (1.6 in)	28 of 100 (Routine)

Counts by Type and Timescale

706 records

Records set or tied on 18 August 1993 by type: Highest daily maximum 111, Lowest daily maximum 120, Highest daily minimum 161, Lowest daily minimum 144, Heaviest daily rainfall 170.

Records on 18 August 1993 by type
Record type	Records
Highest daily maximum	111
Lowest daily maximum	120
Highest daily minimum	161
Lowest daily minimum	144
Heaviest daily rainfall	170
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 1993 by timescale: all-time 2, monthly 20, daily 684.

How Much Records Were Beaten By

517 broken records

Margins by which the 517 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 95.8. Ties are not counted.

Top 20 by Significance

18 August 1993

Top 20 records on 18 August 1993 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1993	Moorcroft 3S, US	all-time rain	96.5 mm (3.8 in)	20.3 mm (0.8 in)	82 years	81 of 100 (Exceptional)
18 August 1993	Kohala Mis 175.1, US	daily rain	89.4 mm (3.5 in)	62.0 mm (2.4 in)	70 years	69 of 100 (Major)
18 August 1993	Reboly, RU	daily rain	41.2 mm (1.6 in)	24.5 mm (1.0 in)	48 years	61 of 100 (Major)
18 August 1993	Mascota (Dge), MX	daily rain	82.8 mm (3.3 in)	52.6 mm (2.1 in)	30 years	53 of 100 (Notable)
18 August 1993	Petrun, RU	monthly rain	37.0 mm (1.5 in)	7.9 mm (0.31 in)	55 years	51 of 100 (Notable)
18 August 1993	Rugozero, RU	daily rain	38.0 mm (1.5 in)	19.6 mm (0.8 in)	48 years	50 of 100 (Notable)
18 August 1993	Zacualtipan (Smn), MX	daily rain	120.4 mm (4.7 in)	95.8 mm (3.8 in)	12 years	48 of 100 (Notable)
18 August 1993	Gilman, US	daily rain	30.2 mm (1.2 in)	21.8 mm (0.9 in)	82 years	48 of 100 (Notable)
18 August 1993	Ewing, US	daily rain	31.8 mm (1.3 in)	14.0 mm (0.6 in)	90 years	47 of 100 (Notable)
18 August 1993	Mascota (Smn), MX	daily rain	82.8 mm (3.3 in)	37.8 mm (1.5 in)	10 years	46 of 100 (Notable)
18 August 1993	Farmington 3NW, US	daily rain	50.3 mm (2.0 in)	18.5 mm (0.7 in)	79 years	46 of 100 (Notable)
18 August 1993	Bowling Green 1 W, US	daily rain	110.5 mm (4.4 in)	84.3 mm (3.3 in)	2 years	44 of 100 (Notable)
18 August 1993	Tiririca, BR	daily rain	53.0 mm (2.1 in)	36.8 mm (1.4 in)	20 years	43 of 100 (Notable)
18 August 1993	Dover, US	daily rain	72.1 mm (2.8 in)	30.2 mm (1.2 in)	60 years	43 of 100 (Notable)
18 August 1993	Plauen, DE	daily low min	4.3 C (39.7 F)	0.7 C (1.3 F)	109 years	42 of 100 (Notable)
18 August 1993	Mahackala, RU	daily low min	12.4 C (54.3 F)	1.1 C (2.0 F)	94 years	42 of 100 (Notable)
18 August 1993	South Lyndeboro, US	daily rain	53.3 mm (2.1 in)	36.8 mm (1.4 in)	44 years	42 of 100 (Notable)
18 August 1993	Rochester Intl AP, US	daily rain	51.8 mm (2.0 in)	27.9 mm (1.1 in)	39 years	42 of 100 (Notable)
18 August 1993	Inverness 3 SE, US	daily low min	19.4 C (66.9 F)	0.6 C (1.1 F)	92 years	41 of 100 (Notable)
18 August 1993	Brassua Dam, US	daily rain	36.3 mm (1.4 in)	20.0 mm (0.8 in)	48 years	41 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 1993

Records set or tied on this calendar date in each year from 1797 to 1993. 1993 had 706 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 1993-08-18: 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 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 20	487
20 to 40	26
40 to 60	1
60 to 80	1
80 to 100	2