Weather Records on 18 August 1977

1,112 weather records were set or tied worldwide on 18 August 1977. Highest significance: Laketown, US.

Key Facts for 18 August 1977

On 18 August 1977, 1,112 weather records were set or tied at long-record stations worldwide.
317 were record highs and 515 were record lows, counting maximum and minimum temperature.
By timescale, 7 were all-time records, 55 monthly and 1,050 daily.
Laketown set a monthly record daily precipitation of 62.7 mm (2.5 in) on 18 August 1977.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 437 records.

Record Map

1,112 stations

1,112 station records on 18 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Laketown	United States	Record daily precipitation	62.7 mm (2.5 in)	78 of 100 (Major)
Richmond	United States	Record daily precipitation	82.8 mm (3.3 in)	69 of 100 (Major)
Border 3 N	United States	Record daily precipitation	33.0 mm (1.3 in)	65 of 100 (Major)
Lifton Pumping STN	United States	Record daily precipitation	43.2 mm (1.7 in)	64 of 100 (Major)
Clover Valley	United States	Record daily precipitation	35.3 mm (1.4 in)	61 of 100 (Major)
Logan Utah St UNIV	United States	Record daily precipitation	48.3 mm (1.9 in)	61 of 100 (Major)
Murphy 4ESE	United States	Record daily precipitation	100.3 mm (3.9 in)	60 of 100 (Major)
Natchez	United States	Record daily precipitation	88.1 mm (3.5 in)	56 of 100 (Notable)
Lufkin Angelina Co AP	United States	Record daily precipitation	99.6 mm (3.9 in)	56 of 100 (Notable)
Bakhmaro	Georgia	Record daily precipitation	96.9 mm (3.8 in)	55 of 100 (Notable)
Kleve	Germany	Record daily precipitation	31.7 mm (1.2 in)	55 of 100 (Notable)
Lagarto	Brazil	Record daily precipitation	61.0 mm (2.4 in)	54 of 100 (Notable)
Big Dalton Dam Fc223C	United States	Record daily precipitation	55.4 mm (2.2 in)	54 of 100 (Notable)
Samtredia	Georgia	Record daily precipitation	112.7 mm (4.4 in)	53 of 100 (Notable)
Keda	Georgia	Record daily precipitation	69.5 mm (2.7 in)	53 of 100 (Notable)
Hood Rvr Exp STN	United States	Record high maximum temperature	42.2 C (108.0 F)	51 of 100 (Notable)
Montello 2NE	United States	Record daily precipitation	31.0 mm (1.2 in)	48 of 100 (Notable)
Rawsonville (Pol)	South Africa	Record daily precipitation	65.0 mm (2.6 in)	47 of 100 (Notable)
Lake Providence	United States	Record daily precipitation	58.4 mm (2.3 in)	47 of 100 (Notable)
Arthur 4NW	United States	Record daily precipitation	25.9 mm (1.0 in)	47 of 100 (Notable)
Rogersville 1 NE	United States	Record daily precipitation	84.6 mm (3.3 in)	47 of 100 (Notable)
Copperhill	United States	Record daily precipitation	68.6 mm (2.7 in)	46 of 100 (Notable)
Washington Wwtp 4W	United States	Record daily precipitation	91.4 mm (3.6 in)	45 of 100 (Notable)
Meleiro	Brazil	Record daily precipitation	93.8 mm (3.7 in)	44 of 100 (Notable)
Athens Ben Epps AP	United States	Record daily precipitation	65.5 mm (2.6 in)	44 of 100 (Notable)
Fairmont	United States	Record daily precipitation	37.1 mm (1.5 in)	43 of 100 (Notable)
Tehachapi	United States	Record daily precipitation	28.7 mm (1.1 in)	43 of 100 (Notable)
Corinne	United States	Record daily precipitation	64.0 mm (2.5 in)	43 of 100 (Notable)
Keithville	United States	Record daily precipitation	64.0 mm (2.5 in)	42 of 100 (Notable)
House	United States	Record daily precipitation	65.5 mm (2.6 in)	42 of 100 (Notable)
Hambantota	Sri Lanka	Record low maximum temperature	27.0 C (80.6 F)	41 of 100 (Notable)
Hattiesburg 5SW	United States	Record daily precipitation	84.6 mm (3.3 in)	41 of 100 (Notable)
Fayetteville (Pwc)	United States	Record daily precipitation	68.3 mm (2.7 in)	41 of 100 (Notable)
Ruston la Tech	United States	Record daily precipitation	38.6 mm (1.5 in)	40 of 100 (Notable)
Eureka	United States	Record daily precipitation	39.4 mm (1.6 in)	39 of 100 (Notable)
Quincy	United States	Record high minimum temperature	20.6 C (69.1 F)	38 of 100 (Notable)
Forder 8 S	United States	Record daily precipitation	41.1 mm (1.6 in)	38 of 100 (Notable)
Poplar Bluff	United States	Record low maximum temperature	25.0 C (77.0 F)	38 of 100 (Notable)
Bear River Refuge	United States	Record daily precipitation	36.3 mm (1.4 in)	38 of 100 (Notable)
Bancroft	Canada	Record low maximum temperature	17.2 C (63.0 F)	37 of 100 (Notable)
Asmara	Eritrea	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Claremont Pomona Clg	United States	Record low maximum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Nevada City	United States	Record high minimum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Gorodovikovsk	Russia	Record daily precipitation	32.5 mm (1.3 in)	36 of 100 (Notable)
Dry Canyon Rsvr	United States	Record daily precipitation	35.6 mm (1.4 in)	36 of 100 (Notable)
Haiwee	United States	Record low maximum temperature	18.9 C (66.0 F)	36 of 100 (Notable)
Ruby Lake Nwr	United States	Record daily precipitation	40.9 mm (1.6 in)	36 of 100 (Notable)
Walhalla	United States	Record low maximum temperature	22.8 C (73.0 F)	36 of 100 (Notable)
Gilmer 4 WNW	United States	Record daily precipitation	75.7 mm (3.0 in)	36 of 100 (Notable)
Welland	Canada	Record low maximum temperature	20.0 C (68.0 F)	35 of 100 (Notable)
Cambridge Galt Moe	Canada	Record low maximum temperature	18.5 C (65.3 F)	35 of 100 (Notable)
Timasevskaja	Russia	Record daily precipitation	61.8 mm (2.4 in)	35 of 100 (Notable)
Brinkley	United States	Record low maximum temperature	27.8 C (82.0 F)	35 of 100 (Notable)
Pacoima Dam Fc33A-E	United States	Record daily precipitation	48.3 mm (1.9 in)	35 of 100 (Notable)
Stillmore	United States	Record daily precipitation	43.2 mm (1.7 in)	35 of 100 (Notable)
Independence	United States	Record low minimum temperature	5.6 C (42.1 F)	35 of 100 (Notable)
Greensburg	United States	Record low maximum temperature	25.0 C (77.0 F)	35 of 100 (Notable)
Woodstock	Canada	Record low maximum temperature	18.0 C (64.4 F)	34 of 100 (Routine)
Gisela	United States	Record daily precipitation	49.0 mm (1.9 in)	34 of 100 (Routine)
Indio Fire STN	United States	Record low maximum temperature	31.7 C (89.1 F)	34 of 100 (Routine)

Counts by Type and Timescale

1,112 records

Records set or tied on 18 August 1977 by type: Highest daily maximum 150, Lowest daily maximum 295, Highest daily minimum 167, Lowest daily minimum 220, Heaviest daily rainfall 280.

Records on 18 August 1977 by type
Record type	Records
Highest daily maximum	150
Lowest daily maximum	295
Highest daily minimum	167
Lowest daily minimum	220
Heaviest daily rainfall	280
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 1977 by timescale: all-time 7, monthly 55, daily 1,050.

How Much Records Were Beaten By

844 broken records

Margins by which the 844 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 100.0. Ties are not counted.

Top 20 by Significance

18 August 1977

Top 20 records on 18 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1977	Laketown, US	monthly rain	62.7 mm (2.5 in)	34.8 mm (1.4 in)	70 years	78 of 100 (Major)
18 August 1977	Richmond, US	all-time rain	82.8 mm (3.3 in)	22.6 mm (0.9 in)	13 years	69 of 100 (Major)
18 August 1977	Border 3 N, US	daily rain	33.0 mm (1.3 in)	20.3 mm (0.8 in)	71 years	65 of 100 (Major)
18 August 1977	Lifton Pumping STN, US	monthly rain	43.2 mm (1.7 in)	18.6 mm (0.7 in)	30 years	64 of 100 (Major)
18 August 1977	Clover Valley, US	monthly rain	35.3 mm (1.4 in)	11.4 mm (0.4 in)	63 years	61 of 100 (Major)
18 August 1977	Logan Utah St UNIV, US	monthly rain	48.3 mm (1.9 in)	13.0 mm (0.5 in)	70 years	61 of 100 (Major)
18 August 1977	Murphy 4ESE, US	daily rain	100.3 mm (3.9 in)	41.9 mm (1.6 in)	70 years	60 of 100 (Major)
18 August 1977	Natchez, US	daily rain	88.1 mm (3.5 in)	37.3 mm (1.5 in)	79 years	56 of 100 (Notable)
18 August 1977	Lufkin Angelina Co AP, US	daily rain	99.6 mm (3.9 in)	48.8 mm (1.9 in)	62 years	56 of 100 (Notable)
18 August 1977	Bakhmaro, GE	monthly rain	96.9 mm (3.8 in)	27.0 mm (1.1 in)	40 years	55 of 100 (Notable)
18 August 1977	Kleve, DE	daily rain	31.7 mm (1.2 in)	17.7 mm (0.7 in)	70 years	55 of 100 (Notable)
18 August 1977	Lagarto, BR	monthly rain	61.0 mm (2.4 in)	13.2 mm (0.5 in)	55 years	54 of 100 (Notable)
18 August 1977	Big Dalton Dam Fc223C, US	monthly rain	55.4 mm (2.2 in)	35.8 mm (1.4 in)	0 years	54 of 100 (Notable)
18 August 1977	Samtredia, GE	daily rain	112.7 mm (4.4 in)	100.0 mm (3.9 in)	32 years	53 of 100 (Notable)
18 August 1977	Keda, GE	daily rain	69.5 mm (2.7 in)	48.6 mm (1.9 in)	32 years	53 of 100 (Notable)
18 August 1977	Hood Rvr Exp STN, US	all-time high max	42.2 C (108.0 F)	1.1 C (2.0 F)	71 years	51 of 100 (Notable)
18 August 1977	Montello 2NE, US	monthly rain	31.0 mm (1.2 in)	5.3 mm (0.21 in)	67 years	48 of 100 (Notable)
18 August 1977	Rawsonville (Pol), ZA	daily rain	65.0 mm (2.6 in)	39.6 mm (1.6 in)	52 years	47 of 100 (Notable)
18 August 1977	Lake Providence, US	daily rain	58.4 mm (2.3 in)	42.1 mm (1.7 in)	51 years	47 of 100 (Notable)
18 August 1977	Arthur 4NW, US	daily rain	25.9 mm (1.0 in)	19.0 mm (0.7 in)	12 years	47 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 1977

Records set or tied on this calendar date in each year from 1797 to 1977. 1977 had 1,112 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 1977-08-18: 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 20	802
20 to 40	31
40 to 60	10
60 to 80	0
80 to 100	1