Weather Records on 15 August 1977

550 weather records were set or tied worldwide on 15 August 1977. Highest significance: Nikolskoye/Beringa Ostrov, RU.

Key Facts for 15 August 1977

On 15 August 1977, 550 weather records were set or tied at long-record stations worldwide.
165 were record highs and 141 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 10 monthly and 536 daily.
Nikolskoye/Beringa Ostrov set an all-time record high maximum temperature of 22.5 C (72.5 F) on 15 August 1977.
Across 168 earlier years (1793 to 2026) the same calendar date averaged 454 records.

Record Map

550 stations

550 station records on 15 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nikolskoye/Beringa Ostrov	Russia	Record high maximum temperature	22.5 C (72.5 F)	64 of 100 (Major)
Pagosa Springs 1SE	United States	Record daily precipitation	37.1 mm (1.5 in)	64 of 100 (Major)
Windom	United States	Record daily precipitation	84.1 mm (3.3 in)	64 of 100 (Major)
Todos Santos (Dge)	Mexico	Record daily precipitation	156.2 mm (6.1 in)	57 of 100 (Notable)
Sioux Falls	United States	Record daily precipitation	82.0 mm (3.2 in)	55 of 100 (Notable)
San Jose del Cabo	Mexico	Record daily precipitation	142.0 mm (5.6 in)	54 of 100 (Notable)
Buenavista de Loreto	Mexico	Record daily precipitation	59.9 mm (2.4 in)	53 of 100 (Notable)
Gothenburg	United States	Record daily precipitation	52.3 mm (2.1 in)	53 of 100 (Notable)
San Bartolo	Mexico	Record daily precipitation	134.9 mm (5.3 in)	52 of 100 (Notable)
Alexandria	United States	Record daily precipitation	90.9 mm (3.6 in)	52 of 100 (Notable)
Emmetsburg	United States	Record daily precipitation	79.2 mm (3.1 in)	51 of 100 (Notable)
Blayney Post Office	Australia	Record daily precipitation	32.8 mm (1.3 in)	50 of 100 (Notable)
Sanborn	United States	Record daily precipitation	80.0 mm (3.1 in)	50 of 100 (Notable)
Milford 4 NW	United States	Record daily precipitation	72.9 mm (2.9 in)	49 of 100 (Notable)
Vale	United States	Record daily precipitation	38.1 mm (1.5 in)	49 of 100 (Notable)
Pinetop 2E	United States	Record daily precipitation	50.0 mm (2.0 in)	48 of 100 (Notable)
Vallecito Dam	United States	Record daily precipitation	33.8 mm (1.3 in)	48 of 100 (Notable)
Canistota 2 N	United States	Record daily precipitation	88.4 mm (3.5 in)	48 of 100 (Notable)
Zwartrandjes	South Africa	Record daily precipitation	26.0 mm (1.0 in)	46 of 100 (Notable)
Silverton	United States	Record daily precipitation	35.6 mm (1.4 in)	46 of 100 (Notable)
Farmerville	United States	Record daily precipitation	53.3 mm (2.1 in)	46 of 100 (Notable)
Sibley	United States	Record daily precipitation	68.1 mm (2.7 in)	45 of 100 (Notable)
Spencer 1 N	United States	Record daily precipitation	74.9 mm (2.9 in)	45 of 100 (Notable)
Sumter	United States	Record daily precipitation	67.8 mm (2.7 in)	45 of 100 (Notable)
Araruna	Brazil	Record daily precipitation	50.1 mm (2.0 in)	44 of 100 (Notable)
Santiago	Mexico	Record daily precipitation	88.4 mm (3.5 in)	44 of 100 (Notable)
Debaltseve	Ukraine	Record daily precipitation	88.9 mm (3.5 in)	42 of 100 (Notable)
Humboldt 3 W	United States	Record daily precipitation	74.7 mm (2.9 in)	42 of 100 (Notable)
Puerto Madero	Mexico	Record low minimum temperature	10.6 C (51.1 F)	40 of 100 (Notable)
Jerome	United States	Record daily precipitation	35.6 mm (1.4 in)	40 of 100 (Notable)
Pinsk	Belarus	Record daily precipitation	26.8 mm (1.1 in)	39 of 100 (Notable)
La Motte (Bos)	South Africa	Record daily precipitation	63.0 mm (2.5 in)	39 of 100 (Notable)
Rawsonville (Pol)	South Africa	Record daily precipitation	73.0 mm (2.9 in)	39 of 100 (Notable)
Tacoma	United States	Record daily precipitation	27.9 mm (1.1 in)	39 of 100 (Notable)
Quincy Mem Brg	United States	Record daily precipitation	73.9 mm (2.9 in)	39 of 100 (Notable)
Le Roy	United States	Record daily precipitation	55.9 mm (2.2 in)	39 of 100 (Notable)
El Molino	Mexico	Record daily precipitation	39.9 mm (1.6 in)	38 of 100 (Notable)
Friend 3E	United States	Record daily precipitation	57.2 mm (2.3 in)	38 of 100 (Notable)
Lagarto	Brazil	Record daily precipitation	31.0 mm (1.2 in)	37 of 100 (Notable)
La Ribera	Mexico	Record daily precipitation	51.1 mm (2.0 in)	35 of 100 (Notable)
Mesa	United States	Record high minimum temperature	28.9 C (84.0 F)	35 of 100 (Notable)
Owensville 3E	United States	Record daily precipitation	66.0 mm (2.6 in)	35 of 100 (Notable)
Cabo San Lucas	Mexico	Record daily precipitation	57.9 mm (2.3 in)	34 of 100 (Routine)
Sheldon	United States	Record daily precipitation	61.0 mm (2.4 in)	34 of 100 (Routine)
Morganton	United States	Record high minimum temperature	23.3 C (73.9 F)	34 of 100 (Routine)
Raymond Terrace Post Office	Australia	Record daily precipitation	30.0 mm (1.2 in)	33 of 100 (Routine)
Primghar	United States	Record daily precipitation	59.7 mm (2.4 in)	33 of 100 (Routine)
Madison	United States	Record daily precipitation	33.5 mm (1.3 in)	33 of 100 (Routine)
Mott	United States	Record low maximum temperature	18.3 C (64.9 F)	33 of 100 (Routine)
Eagle FAA AP	United States	Record high minimum temperature	12.8 C (55.0 F)	33 of 100 (Routine)
Dongara	Australia	Record daily precipitation	25.5 mm (1.0 in)	32 of 100 (Routine)
Izmail	Ukraine	Record daily precipitation	26.5 mm (1.0 in)	32 of 100 (Routine)
Curryville 3 W	United States	Record daily precipitation	30.5 mm (1.2 in)	32 of 100 (Routine)
Jeanerette 5 NW	United States	Record low maximum temperature	30.0 C (86.0 F)	32 of 100 (Routine)
New England	United States	Record low maximum temperature	20.6 C (69.1 F)	32 of 100 (Routine)
Stehekin 4 NW	United States	Record high maximum temperature	37.8 C (100.0 F)	32 of 100 (Routine)
Saint Paul	United States	Record daily precipitation	38.9 mm (1.5 in)	31 of 100 (Routine)
Conasauga 2N	United States	Record daily precipitation	75.2 mm (3.0 in)	31 of 100 (Routine)
Calexico 2 NE	United States	Record daily precipitation	67.6 mm (2.7 in)	30 of 100 (Routine)
Laguna	United States	Record low maximum temperature	23.9 C (75.0 F)	30 of 100 (Routine)

Counts by Type and Timescale

550 records

Records set or tied on 15 August 1977 by type: Highest daily maximum 47, Lowest daily maximum 93, Highest daily minimum 118, Lowest daily minimum 48, Heaviest daily rainfall 244.

Records on 15 August 1977 by type
Record type	Records
Highest daily maximum	47
Lowest daily maximum	93
Highest daily minimum	118
Lowest daily minimum	48
Heaviest daily rainfall	244
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 August 1977 by timescale: all-time 4, monthly 10, daily 536.

How Much Records Were Beaten By

443 broken records

Margins by which the 443 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 134.9. Ties are not counted.

Top 20 by Significance

15 August 1977

Top 20 records on 15 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 August 1977	Nikolskoye/Beringa Ostrov, RU	all-time high max	22.5 C (72.5 F)	2.5 C (4.5 F)	78 years	64 of 100 (Major)
15 August 1977	Pagosa Springs 1SE, US	daily rain	37.1 mm (1.5 in)	23.9 mm (0.9 in)	68 years	64 of 100 (Major)
15 August 1977	Windom, US	daily rain	84.1 mm (3.3 in)	57.7 mm (2.3 in)	59 years	64 of 100 (Major)
15 August 1977	Todos Santos (Dge), MX	all-time rain	156.2 mm (6.1 in)	26.4 mm (1.0 in)	27 years	57 of 100 (Notable)
15 August 1977	Sioux Falls, US	daily rain	82.0 mm (3.2 in)	57.6 mm (2.3 in)	43 years	55 of 100 (Notable)
15 August 1977	San Jose del Cabo, MX	daily rain	142.0 mm (5.6 in)	134.9 mm (5.3 in)	32 years	54 of 100 (Notable)
15 August 1977	Buenavista de Loreto, MX	daily rain	59.9 mm (2.4 in)	59.9 mm (2.4 in)	36 years	53 of 100 (Notable)
15 August 1977	Gothenburg, US	daily rain	52.3 mm (2.1 in)	28.7 mm (1.1 in)	74 years	53 of 100 (Notable)
15 August 1977	San Bartolo, MX	daily rain	134.9 mm (5.3 in)	97.1 mm (3.8 in)	32 years	52 of 100 (Notable)
15 August 1977	Alexandria, US	monthly rain	90.9 mm (3.6 in)	12.2 mm (0.5 in)	82 years	52 of 100 (Notable)
15 August 1977	Emmetsburg, US	daily rain	79.2 mm (3.1 in)	66.5 mm (2.6 in)	11 years	51 of 100 (Notable)
15 August 1977	Blayney Post Office, AU	daily rain	32.8 mm (1.3 in)	11.7 mm (0.5 in)	90 years	50 of 100 (Notable)
15 August 1977	Sanborn, US	daily rain	80.0 mm (3.1 in)	45.5 mm (1.8 in)	52 years	50 of 100 (Notable)
15 August 1977	Milford 4 NW, US	daily rain	72.9 mm (2.9 in)	49.8 mm (2.0 in)	24 years	49 of 100 (Notable)
15 August 1977	Vale, US	daily rain	38.1 mm (1.5 in)	19.0 mm (0.7 in)	67 years	49 of 100 (Notable)
15 August 1977	Pinetop 2E, US	daily rain	50.0 mm (2.0 in)	34.0 mm (1.3 in)	23 years	48 of 100 (Notable)
15 August 1977	Vallecito Dam, US	daily rain	33.8 mm (1.3 in)	24.9 mm (1.0 in)	23 years	48 of 100 (Notable)
15 August 1977	Canistota 2 N, US	daily rain	88.4 mm (3.5 in)	67.1 mm (2.6 in)	11 years	48 of 100 (Notable)
15 August 1977	Zwartrandjes, ZA	monthly rain	26.0 mm (1.0 in)	9.5 mm (0.37 in)	25 years	46 of 100 (Notable)
15 August 1977	Silverton, US	daily rain	35.6 mm (1.4 in)	19.1 mm (0.8 in)	7 years	46 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 1977

Records set or tied on this calendar date in each year from 1793 to 1977. 1977 had 550 records.

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

Records on 08-15 in each year
Year	Records
1793	2
1802	1
1805	1
1812	1
1821	1
1838	2
1839	1
1841	1
1844	1
1845	3
1852	1
1854	1
1856	1
1858	1
1861	3
1867	1
1868	2
1869	1
1873	2
1875	1
1876	2
1877	1
1878	1
1879	1
1880	3
1881	2
1882	2
1883	1
1884	2
1885	3
1886	1
1887	1
1888	3
1890	2
1891	2
1892	3
1893	3
1895	1
1896	9
1897	3
1898	1
1899	2
1900	6
1901	5
1902	10
1903	5
1904	17
1905	26
1906	8
1907	14
1908	15
1909	30
1910	16
1911	26
1912	34
1913	42
1914	11
1915	26
1916	223
1917	32
1918	23
1919	22
1920	59
1921	55
1922	86
1923	116
1924	220
1925	91
1926	115
1927	223
1928	271
1929	586
1930	274
1931	351
1932	368
1933	268
1934	992
1935	414
1936	867
1937	574
1938	681
1939	450
1940	372
1941	289
1942	377
1943	426
1944	610
1945	433
1946	285
1947	559
1948	366
1949	559
1950	317
1951	597
1952	596
1953	449
1954	481
1955	539
1956	390
1957	355
1958	1,092
1959	515
1960	417
1961	704
1962	1,052
1963	972
1964	1,185
1965	535
1966	340
1967	687
1968	1,002
1969	583
1970	382
1971	899
1972	613
1973	499
1974	512
1975	490
1976	1,345
1977	550
1978	841
1979	1,788
1980	745
1981	588
1982	479
1983	955
1984	622
1985	915
1986	1,283
1987	1,098
1988	1,479
1989	495
1990	758
1991	778
1992	1,638
1993	831
1994	1,073
1995	1,298
1996	929
1997	927
1998	861
1999	956
2000	932
2001	1,254
2002	1,307
2003	1,248
2004	1,424
2005	1,067
2006	923
2007	1,317
2008	964
2009	1,038
2010	1,622
2011	770
2012	654
2013	711
2014	583
2015	759
2016	707
2017	532
2018	328
2019	435
2020	1,327
2021	900
2022	692
2023	1,414
2024	729
2025	772
2026	975

Download the Data

Data for records on 1977-08-15: 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	404
20 to 40	25
40 to 60	9
60 to 80	3
80 to 100	1
100 to 120	0
120 to 140	1