Weather Records on 12 August 1977

747 weather records were set or tied worldwide on 12 August 1977. Highest significance: Animas 3ESE, US.

Key Facts for 12 August 1977

On 12 August 1977, 747 weather records were set or tied at long-record stations worldwide.
280 were record highs and 227 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 23 monthly and 722 daily.
Animas 3ESE set an all-time record daily precipitation of 103.4 mm (4.1 in) on 12 August 1977.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 446 records.

Record Map

747 stations

747 station records on 12 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Animas 3ESE	United States	Record daily precipitation	103.4 mm (4.1 in)	61 of 100 (Major)
Homestead Exp STN	United States	Record daily precipitation	94.0 mm (3.7 in)	57 of 100 (Notable)
Scottsburg	United States	Record daily precipitation	67.1 mm (2.6 in)	57 of 100 (Notable)
Artesia 6S	United States	Record daily precipitation	58.4 mm (2.3 in)	57 of 100 (Notable)
Matiwa (B0S)	South Africa	Record daily precipitation	78.0 mm (3.1 in)	50 of 100 (Notable)
Miami Beach	United States	Record daily precipitation	58.7 mm (2.3 in)	49 of 100 (Notable)
Piaxtla	Mexico	Record daily precipitation	79.8 mm (3.1 in)	48 of 100 (Notable)
Herford	Germany	Record daily precipitation	40.0 mm (1.6 in)	47 of 100 (Notable)
Nurburg	Germany	Record daily precipitation	49.7 mm (2.0 in)	46 of 100 (Notable)
Longville	United States	Record daily precipitation	83.1 mm (3.3 in)	46 of 100 (Notable)
Chardon	United States	Record daily precipitation	94.0 mm (3.7 in)	46 of 100 (Notable)
Durant	United States	Record daily precipitation	82.6 mm (3.3 in)	46 of 100 (Notable)
Hope	United States	Record daily precipitation	40.9 mm (1.6 in)	45 of 100 (Notable)
Uppsala_Aut	Sweden	Record low maximum temperature	13.9 C (57.0 F)	43 of 100 (Notable)
Madison Sewage Plt	United States	Record daily precipitation	61.2 mm (2.4 in)	43 of 100 (Notable)
Vevay	United States	Record daily precipitation	54.6 mm (2.1 in)	43 of 100 (Notable)
Sarapul	Russia	Record daily precipitation	49.0 mm (1.9 in)	41 of 100 (Notable)
Carlsbad	United States	Record daily precipitation	34.0 mm (1.3 in)	41 of 100 (Notable)
Edwardsport Pwr Plt	United States	Record daily precipitation	67.3 mm (2.6 in)	40 of 100 (Notable)
Williams 3 SW	United States	Record daily precipitation	68.6 mm (2.7 in)	39 of 100 (Notable)
Falmouth	United States	Record daily precipitation	56.1 mm (2.2 in)	37 of 100 (Notable)
Van Wert 1 S	United States	Record daily precipitation	42.4 mm (1.7 in)	37 of 100 (Notable)
Annapolis 3 SW	United States	Record daily precipitation	60.2 mm (2.4 in)	36 of 100 (Notable)
Reynolds	United States	Record daily precipitation	81.3 mm (3.2 in)	36 of 100 (Notable)
Ft Benton	United States	Record low minimum temperature	1.7 C (35.1 F)	36 of 100 (Notable)
Mutual	United States	Record low maximum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
Hillsboro	United States	Record high minimum temperature	23.3 C (73.9 F)	36 of 100 (Notable)
Pogranichnyj	Russia	Record low minimum temperature	9.1 C (48.4 F)	35 of 100 (Notable)
Warrensburg 4NW	United States	Record low maximum temperature	20.6 C (69.1 F)	35 of 100 (Notable)
Anacortes	United States	Record high minimum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Walgett Council Depot	Australia	Record high minimum temperature	15.2 C (59.4 F)	34 of 100 (Routine)
Coleman	Canada	Record daily precipitation	27.4 mm (1.1 in)	34 of 100 (Routine)
Griggsville	United States	Record low minimum temperature	10.6 C (51.1 F)	34 of 100 (Routine)
Vincennes 4 E	United States	Record daily precipitation	75.7 mm (3.0 in)	34 of 100 (Routine)
Arcadia	United States	Record daily precipitation	71.6 mm (2.8 in)	34 of 100 (Routine)
Mimbres 4NNW	United States	Record daily precipitation	48.8 mm (1.9 in)	34 of 100 (Routine)
Bolivar	United States	Record daily precipitation	32.5 mm (1.3 in)	34 of 100 (Routine)
Middletown 2 NW	United States	Record high maximum temperature	31.1 C (88.0 F)	34 of 100 (Routine)
Setauket Strong	United States	Record high minimum temperature	23.3 C (73.9 F)	34 of 100 (Routine)
Enid	United States	Record low maximum temperature	25.0 C (77.0 F)	34 of 100 (Routine)
Haleakala Exp Farm 434	United States	Record daily precipitation	48.8 mm (1.9 in)	34 of 100 (Routine)
Williamstown	United States	Record daily precipitation	79.2 mm (3.1 in)	33 of 100 (Routine)
Jeanerette 5 NW	United States	Record daily precipitation	32.0 mm (1.3 in)	33 of 100 (Routine)
Orenburg	Russia	Record high minimum temperature	23.0 C (73.4 F)	32 of 100 (Routine)
Vasteras-Hasslo	Sweden	Record low maximum temperature	15.0 C (59.0 F)	32 of 100 (Routine)
Waterdale	United States	Record low maximum temperature	18.3 C (64.9 F)	32 of 100 (Routine)
Bison 3NW	United States	Record low maximum temperature	22.2 C (72.0 F)	32 of 100 (Routine)
Van Buren 1 NE	United States	Record daily precipitation	72.4 mm (2.9 in)	32 of 100 (Routine)
Big Timber	United States	Record low minimum temperature	3.9 C (39.0 F)	32 of 100 (Routine)
Los Alamos	United States	Record low maximum temperature	16.1 C (61.0 F)	32 of 100 (Routine)
Kleve	Germany	Record daily precipitation	25.9 mm (1.0 in)	31 of 100 (Routine)
Seesen	Germany	Record daily precipitation	33.6 mm (1.3 in)	31 of 100 (Routine)
Roosevelt 1 S	United States	Record low minimum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Boulder	United States	Record low minimum temperature	9.4 C (48.9 F)	31 of 100 (Routine)
Angola	United States	Record low minimum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Carthage	United States	Record daily precipitation	37.8 mm (1.5 in)	31 of 100 (Routine)
Vaughn	United States	Record low maximum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Goodwell Rsch STN	United States	Record low maximum temperature	21.7 C (71.1 F)	31 of 100 (Routine)
Beckum-Unterberg	Germany	Record daily precipitation	35.7 mm (1.4 in)	30 of 100 (Routine)
Puerto Madero	Mexico	Record low minimum temperature	13.9 C (57.0 F)	30 of 100 (Routine)

Counts by Type and Timescale

747 records

Records set or tied on 12 August 1977 by type: Highest daily maximum 139, Lowest daily maximum 156, Highest daily minimum 141, Lowest daily minimum 71, Heaviest daily rainfall 240.

Records on 12 August 1977 by type
Record type	Records
Highest daily maximum	139
Lowest daily maximum	156
Highest daily minimum	141
Lowest daily minimum	71
Heaviest daily rainfall	240
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 August 1977 by timescale: all-time 2, monthly 23, daily 722.

How Much Records Were Beaten By

558 broken records

Margins by which the 558 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.1. Ties are not counted.

Top 20 by Significance

12 August 1977

Top 20 records on 12 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 August 1977	Animas 3ESE, US	all-time rain	103.4 mm (4.1 in)	28.7 mm (1.1 in)	25 years	61 of 100 (Major)
12 August 1977	Homestead Exp STN, US	daily rain	94.0 mm (3.7 in)	62.5 mm (2.5 in)	36 years	57 of 100 (Notable)
12 August 1977	Scottsburg, US	daily rain	67.1 mm (2.6 in)	39.9 mm (1.6 in)	64 years	57 of 100 (Notable)
12 August 1977	Artesia 6S, US	daily rain	58.4 mm (2.3 in)	45.7 mm (1.8 in)	36 years	57 of 100 (Notable)
12 August 1977	Matiwa (B0S), ZA	daily rain	78.0 mm (3.1 in)	60.0 mm (2.4 in)	23 years	50 of 100 (Notable)
12 August 1977	Miami Beach, US	daily rain	58.7 mm (2.3 in)	47.8 mm (1.9 in)	48 years	49 of 100 (Notable)
12 August 1977	Piaxtla, MX	daily rain	79.8 mm (3.1 in)	45.0 mm (1.8 in)	32 years	48 of 100 (Notable)
12 August 1977	Herford, DE	daily rain	40.0 mm (1.6 in)	30.2 mm (1.2 in)	12 years	47 of 100 (Notable)
12 August 1977	Nurburg, DE	daily rain	49.7 mm (2.0 in)	33.8 mm (1.3 in)	12 years	46 of 100 (Notable)
12 August 1977	Longville, US	daily rain	83.1 mm (3.3 in)	65.1 mm (2.6 in)	11 years	46 of 100 (Notable)
12 August 1977	Chardon, US	daily rain	94.0 mm (3.7 in)	54.1 mm (2.1 in)	12 years	46 of 100 (Notable)
12 August 1977	Durant, US	daily rain	82.6 mm (3.3 in)	47.0 mm (1.9 in)	44 years	46 of 100 (Notable)
12 August 1977	Hope, US	daily rain	40.9 mm (1.6 in)	39.1 mm (1.5 in)	36 years	45 of 100 (Notable)
12 August 1977	Uppsala_Aut, SE	daily low max	13.9 C (57.0 F)	1.3 C (2.3 F)	112 years	43 of 100 (Notable)
12 August 1977	Madison Sewage Plt, US	daily rain	61.2 mm (2.4 in)	23.4 mm (0.9 in)	56 years	43 of 100 (Notable)
12 August 1977	Vevay, US	daily rain	54.6 mm (2.1 in)	21.6 mm (0.9 in)	64 years	43 of 100 (Notable)
12 August 1977	Sarapul, RU	monthly rain	49.0 mm (1.9 in)	10.5 mm (0.4 in)	27 years	41 of 100 (Notable)
12 August 1977	Carlsbad, US	daily rain	34.0 mm (1.3 in)	22.1 mm (0.9 in)	62 years	41 of 100 (Notable)
12 August 1977	Edwardsport Pwr Plt, US	daily rain	67.3 mm (2.6 in)	30.0 mm (1.2 in)	52 years	40 of 100 (Notable)
12 August 1977	Williams 3 SW, US	daily rain	68.6 mm (2.7 in)	41.4 mm (1.6 in)	40 years	39 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 747 records.

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

Records on 08-12 in each year
Year	Records
1793	1
1796	1
1811	2
1814	1
1815	1
1825	1
1843	1
1851	1
1854	1
1855	2
1856	1
1861	1
1864	3
1865	1
1867	1
1868	1
1871	2
1872	1
1873	1
1874	2
1875	3
1876	2
1879	1
1881	2
1883	1
1884	1
1885	1
1887	2
1888	2
1889	4
1890	4
1891	4
1892	2
1893	1
1894	1
1895	6
1896	2
1897	4
1898	1
1899	10
1900	1
1901	5
1902	9
1903	14
1904	13
1905	16
1906	8
1907	8
1908	31
1909	42
1910	16
1911	33
1912	40
1913	39
1914	26
1915	46
1916	31
1917	134
1918	37
1919	42
1920	26
1921	174
1922	71
1923	89
1924	267
1925	150
1926	154
1927	145
1928	173
1929	276
1930	501
1931	708
1932	418
1933	271
1934	471
1935	408
1936	591
1937	356
1938	237
1939	282
1940	545
1941	481
1942	257
1943	523
1944	595
1945	295
1946	655
1947	729
1948	384
1949	469
1950	442
1951	357
1952	533
1953	227
1954	969
1955	590
1956	265
1957	384
1958	406
1959	388
1960	707
1961	381
1962	466
1963	559
1964	1,346
1965	977
1966	777
1967	1,135
1968	444
1969	629
1970	422
1971	486
1972	473
1973	442
1974	560
1975	593
1976	495
1977	747
1978	571
1979	1,192
1980	692
1981	665
1982	789
1983	923
1984	665
1985	935
1986	615
1987	935
1988	1,518
1989	827
1990	727
1991	726
1992	1,134
1993	936
1994	861
1995	1,654
1996	1,336
1997	1,363
1998	1,215
1999	1,325
2000	741
2001	855
2002	1,345
2003	1,752
2004	1,872
2005	1,085
2006	874
2007	1,209
2008	970
2009	814
2010	1,907
2011	903
2012	910
2013	427
2014	787
2015	757
2016	1,290
2017	533
2018	571
2019	695
2020	730
2021	980
2022	616
2023	779
2024	659
2025	639
2026	849

Download the Data

Data for records on 1977-08-12: 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	479
10 to 20	41
20 to 30	18
30 to 40	10
40 to 50	6
50 to 60	1
60 to 70	3