Weather Records on 11 August 1977

845 weather records were set or tied worldwide on 11 August 1977. Highest significance: Vysnij Volocek, RU.

Key Facts for 11 August 1977

On 11 August 1977, 845 weather records were set or tied at long-record stations worldwide.
265 were record highs and 270 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 20 monthly and 823 daily.
Vysnij Volocek set a daily record precipitation of 46.2 mm (1.8 in) on 11 August 1977.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 458 records.

Record Map

845 stations

845 station records on 11 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Vysnij Volocek	Russia	Record daily precipitation	46.2 mm (1.8 in)	67 of 100 (Major)
Newton	United States	Record daily precipitation	78.0 mm (3.1 in)	65 of 100 (Major)
Valdaj	Russia	Record daily precipitation	42.2 mm (1.7 in)	59 of 100 (Notable)
Alejskaja	Russia	Record daily precipitation	54.2 mm (2.1 in)	56 of 100 (Notable)
Sedgwick	United States	Record daily precipitation	92.7 mm (3.6 in)	56 of 100 (Notable)
Borovici	Russia	Record daily precipitation	41.0 mm (1.6 in)	55 of 100 (Notable)
Fall Rvr Lake	United States	Record daily precipitation	64.8 mm (2.6 in)	54 of 100 (Notable)
Teterow	Germany	Record daily precipitation	29.3 mm (1.2 in)	53 of 100 (Notable)
Umbarger	United States	Record daily precipitation	96.5 mm (3.8 in)	53 of 100 (Notable)
Kochki	Russia	Record daily precipitation	32.7 mm (1.3 in)	52 of 100 (Notable)
Rzev	Russia	Record daily precipitation	26.4 mm (1.0 in)	46 of 100 (Notable)
Nikolsk	Russia	Record daily precipitation	31.4 mm (1.2 in)	46 of 100 (Notable)
Preston 7 NW	United States	Record daily precipitation	57.7 mm (2.3 in)	46 of 100 (Notable)
New Berlin	United States	Record daily precipitation	52.8 mm (2.1 in)	46 of 100 (Notable)
Puerto Madero	Mexico	Record low maximum temperature	20.6 C (69.1 F)	45 of 100 (Notable)
Hvojnaja	Russia	Record daily precipitation	29.9 mm (1.2 in)	45 of 100 (Notable)
Intake	South Africa	Record daily precipitation	37.5 mm (1.5 in)	45 of 100 (Notable)
Eureka 1E	United States	Record daily precipitation	90.2 mm (3.6 in)	45 of 100 (Notable)
Muzi	Russia	Record daily precipitation	51.1 mm (2.0 in)	44 of 100 (Notable)
Barrett Meadows	Australia	Record daily precipitation	46.6 mm (1.8 in)	43 of 100 (Notable)
Maine-Sorda	Niger	Record daily precipitation	90.5 mm (3.6 in)	43 of 100 (Notable)
Sharon Springs	United States	Record daily precipitation	67.8 mm (2.7 in)	43 of 100 (Notable)
Springview 2NW	United States	Record low maximum temperature	13.3 C (55.9 F)	43 of 100 (Notable)
Deniliquin (Wilkinson St)	Australia	Record high maximum temperature	25.8 C (78.4 F)	42 of 100 (Notable)
Augusta	United States	Record daily precipitation	101.6 mm (4.0 in)	42 of 100 (Notable)
Mt Hope	United States	Record daily precipitation	46.2 mm (1.8 in)	42 of 100 (Notable)
Villa de Chiapilla	Mexico	Record daily precipitation	70.9 mm (2.8 in)	41 of 100 (Notable)
Rtiscevo	Russia	Record daily precipitation	29.2 mm (1.1 in)	41 of 100 (Notable)
Wellington	United States	Record daily precipitation	57.4 mm (2.3 in)	41 of 100 (Notable)
Cameron	United States	Record daily precipitation	108.0 mm (4.3 in)	41 of 100 (Notable)
Leoti	United States	Record daily precipitation	35.1 mm (1.4 in)	40 of 100 (Notable)
Arteaga (Smn)	Mexico	Record daily precipitation	39.9 mm (1.6 in)	39 of 100 (Notable)
Howard 2SE	United States	Record daily precipitation	66.0 mm (2.6 in)	39 of 100 (Notable)
Cureton Rch	United States	Record daily precipitation	53.8 mm (2.1 in)	39 of 100 (Notable)
Paysandu	Uruguay	Record daily precipitation	68.0 mm (2.7 in)	39 of 100 (Notable)
Winfield 3NE	United States	Record daily precipitation	52.3 mm (2.1 in)	38 of 100 (Notable)
Sullivan	United States	Record daily precipitation	78.5 mm (3.1 in)	38 of 100 (Notable)
Martinsdale 3 NNW	United States	Record low minimum temperature	-1.1 C (30.0 F)	38 of 100 (Notable)
Hemlock	United States	Record daily precipitation	29.2 mm (1.1 in)	38 of 100 (Notable)
Findlay Wpcc	United States	Record daily precipitation	49.3 mm (1.9 in)	38 of 100 (Notable)
Reydon 2SSE	United States	Record daily precipitation	44.5 mm (1.8 in)	38 of 100 (Notable)
Youngs Siding	Australia	Record daily precipitation	34.2 mm (1.3 in)	37 of 100 (Notable)
Nikorcminda	Georgia	Record daily precipitation	37.6 mm (1.5 in)	37 of 100 (Notable)
Steelville 2 N	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Adelaide West Terrace	Australia	Record high minimum temperature	15.8 C (60.4 F)	36 of 100 (Notable)
Iola 1 W	United States	Record daily precipitation	57.2 mm (2.3 in)	36 of 100 (Notable)
Lafayette Springs	United States	Record daily precipitation	64.5 mm (2.5 in)	36 of 100 (Notable)
Tomsk	Russia	Record daily precipitation	38.2 mm (1.5 in)	35 of 100 (Notable)
Parsons 2 NW	United States	Record daily precipitation	67.6 mm (2.7 in)	35 of 100 (Notable)
Manchester 4 W	United States	Record daily precipitation	63.5 mm (2.5 in)	35 of 100 (Notable)
Porter 2 E	United States	Record daily precipitation	52.3 mm (2.1 in)	35 of 100 (Notable)
Tohatchi 1 ESE	United States	Record daily precipitation	48.3 mm (1.9 in)	35 of 100 (Notable)
Panhandle	United States	Record daily precipitation	47.2 mm (1.9 in)	35 of 100 (Notable)
Blackdown	South Africa	Record daily precipitation	40.0 mm (1.6 in)	34 of 100 (Routine)
Notinsila (Bos)	South Africa	Record daily precipitation	48.0 mm (1.9 in)	34 of 100 (Routine)
Hudson	United States	Record daily precipitation	29.5 mm (1.2 in)	34 of 100 (Routine)
Creighton	United States	Record low minimum temperature	4.4 C (39.9 F)	34 of 100 (Routine)
House	United States	Record daily precipitation	102.9 mm (4.1 in)	34 of 100 (Routine)
Rogersville 1 NE	United States	Record daily precipitation	30.5 mm (1.2 in)	34 of 100 (Routine)
Canon City	United States	Record low minimum temperature	8.3 C (46.9 F)	33 of 100 (Routine)

Counts by Type and Timescale

845 records

Records set or tied on 11 August 1977 by type: Highest daily maximum 127, Lowest daily maximum 112, Highest daily minimum 138, Lowest daily minimum 158, Heaviest daily rainfall 310.

Records on 11 August 1977 by type
Record type	Records
Highest daily maximum	127
Lowest daily maximum	112
Highest daily minimum	138
Lowest daily minimum	158
Heaviest daily rainfall	310
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 August 1977 by timescale: all-time 2, monthly 20, daily 823.

How Much Records Were Beaten By

677 broken records

Margins by which the 677 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 80.8. Ties are not counted.

Top 20 by Significance

11 August 1977

Top 20 records on 11 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 August 1977	Vysnij Volocek, RU	daily rain	46.2 mm (1.8 in)	24.5 mm (1.0 in)	64 years	67 of 100 (Major)
11 August 1977	Newton, US	daily rain	78.0 mm (3.1 in)	59.2 mm (2.3 in)	76 years	65 of 100 (Major)
11 August 1977	Valdaj, RU	daily rain	42.2 mm (1.7 in)	22.8 mm (0.9 in)	48 years	59 of 100 (Notable)
11 August 1977	Alejskaja, RU	monthly rain	54.2 mm (2.1 in)	21.2 mm (0.8 in)	11 years	56 of 100 (Notable)
11 August 1977	Sedgwick, US	daily rain	92.7 mm (3.6 in)	64.3 mm (2.5 in)	44 years	56 of 100 (Notable)
11 August 1977	Borovici, RU	daily rain	41.0 mm (1.6 in)	24.3 mm (1.0 in)	36 years	55 of 100 (Notable)
11 August 1977	Fall Rvr Lake, US	daily rain	64.8 mm (2.6 in)	51.8 mm (2.0 in)	28 years	54 of 100 (Notable)
11 August 1977	Teterow, DE	daily rain	29.3 mm (1.2 in)	19.1 mm (0.8 in)	56 years	53 of 100 (Notable)
11 August 1977	Umbarger, US	daily rain	96.5 mm (3.8 in)	80.8 mm (3.2 in)	35 years	53 of 100 (Notable)
11 August 1977	Kochki, RU	daily rain	32.7 mm (1.3 in)	24.0 mm (0.9 in)	36 years	52 of 100 (Notable)
11 August 1977	Rzev, RU	daily rain	26.4 mm (1.0 in)	23.4 mm (0.9 in)	32 years	46 of 100 (Notable)
11 August 1977	Nikolsk, RU	daily rain	31.4 mm (1.2 in)	23.5 mm (0.9 in)	24 years	46 of 100 (Notable)
11 August 1977	Preston 7 NW, US	daily rain	57.7 mm (2.3 in)	52.4 mm (2.1 in)	27 years	46 of 100 (Notable)
11 August 1977	New Berlin, US	daily rain	52.8 mm (2.1 in)	22.1 mm (0.9 in)	63 years	46 of 100 (Notable)
11 August 1977	Puerto Madero, MX	daily low max	20.6 C (69.1 F)	9.4 C (16.9 F)	8 years	45 of 100 (Notable)
11 August 1977	Hvojnaja, RU	daily rain	29.9 mm (1.2 in)	18.8 mm (0.7 in)	32 years	45 of 100 (Notable)
11 August 1977	Intake, ZA	daily rain	37.5 mm (1.5 in)	23.8 mm (0.9 in)	52 years	45 of 100 (Notable)
11 August 1977	Eureka 1E, US	monthly rain	90.2 mm (3.6 in)	5.1 mm (0.20 in)	81 years	45 of 100 (Notable)
11 August 1977	Muzi, RU	daily rain	51.1 mm (2.0 in)	28.9 mm (1.1 in)	2 years	44 of 100 (Notable)
11 August 1977	Barrett Meadows, AU	daily rain	46.6 mm (1.8 in)	23.0 mm (0.9 in)	15 years	43 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 845 records.

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

Records on 08-11 in each year
Year	Records
1793	1
1796	1
1811	1
1815	2
1838	1
1839	1
1841	1
1851	1
1855	1
1858	1
1861	2
1862	1
1863	1
1864	6
1865	1
1866	6
1869	4
1871	1
1875	1
1879	2
1881	1
1883	1
1885	1
1888	1
1889	4
1890	4
1891	1
1892	4
1893	1
1894	1
1895	2
1896	5
1897	3
1898	2
1899	3
1900	4
1901	4
1902	13
1903	12
1904	19
1905	9
1906	6
1907	8
1908	10
1909	41
1910	9
1911	24
1912	46
1913	43
1914	26
1915	27
1916	64
1917	217
1918	29
1919	18
1920	54
1921	201
1922	98
1923	80
1924	149
1925	219
1926	140
1927	190
1928	174
1929	354
1930	471
1931	453
1932	281
1933	416
1934	620
1935	499
1936	541
1937	356
1938	315
1939	389
1940	359
1941	807
1942	390
1943	345
1944	936
1945	401
1946	419
1947	709
1948	306
1949	471
1950	320
1951	296
1952	417
1953	283
1954	536
1955	319
1956	457
1957	305
1958	494
1959	337
1960	461
1961	429
1962	662
1963	493
1964	677
1965	793
1966	1,037
1967	1,071
1968	619
1969	533
1970	526
1971	711
1972	823
1973	451
1974	596
1975	753
1976	529
1977	845
1978	433
1979	797
1980	929
1981	645
1982	1,232
1983	1,095
1984	822
1985	804
1986	563
1987	885
1988	1,119
1989	983
1990	760
1991	822
1992	928
1993	840
1994	1,173
1995	1,324
1996	1,147
1997	1,512
1998	1,232
1999	1,152
2000	924
2001	811
2002	1,152
2003	1,601
2004	1,478
2005	1,031
2006	896
2007	1,428
2008	945
2009	836
2010	2,289
2011	1,106
2012	953
2013	470
2014	556
2015	696
2016	1,340
2017	619
2018	861
2019	758
2020	688
2021	834
2022	661
2023	757
2024	643
2025	722
2026	765

Download the Data

Data for records on 1977-08-11: 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	618
20 to 40	46
40 to 60	11
60 to 80	1
80 to 100	1