Weather Records on 20 August 1977

860 weather records were set or tied worldwide on 20 August 1977. Highest significance: Lozova, UA.

Key Facts for 20 August 1977

On 20 August 1977, 860 weather records were set or tied at long-record stations worldwide.
217 were record highs and 451 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 33 monthly and 825 daily.
Lozova set a daily record precipitation of 43.0 mm (1.7 in) on 20 August 1977.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 452 records.

Record Map

860 stations

860 station records on 20 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lozova	Ukraine	Record daily precipitation	43.0 mm (1.7 in)	56 of 100 (Notable)
Antelope	United States	Record daily precipitation	64.3 mm (2.5 in)	53 of 100 (Notable)
Sahuaripa	Mexico	Record daily precipitation	63.8 mm (2.5 in)	52 of 100 (Notable)
Nikopol	Ukraine	Record daily precipitation	42.6 mm (1.7 in)	50 of 100 (Notable)
Greenville Kgvl Radio	United States	Record daily precipitation	71.1 mm (2.8 in)	49 of 100 (Notable)
Brest	Belarus	Record daily precipitation	53.1 mm (2.1 in)	48 of 100 (Notable)
Dallas Hensley Fld NAS	United States	Record daily precipitation	149.9 mm (5.9 in)	48 of 100 (Notable)
Svatove	Ukraine	Record daily precipitation	37.5 mm (1.5 in)	47 of 100 (Notable)
Roosevelt	United States	Record daily precipitation	45.5 mm (1.8 in)	47 of 100 (Notable)
Krasnohrad	Ukraine	Record daily precipitation	29.7 mm (1.2 in)	46 of 100 (Notable)
Walters	United States	Record daily precipitation	82.8 mm (3.3 in)	45 of 100 (Notable)
Bilovodsk	Ukraine	Record daily precipitation	49.6 mm (2.0 in)	44 of 100 (Notable)
Fernandina Beach	United States	Record daily precipitation	96.5 mm (3.8 in)	44 of 100 (Notable)
Javlenka	Kazakhstan	Record daily precipitation	33.4 mm (1.3 in)	43 of 100 (Notable)
Viljujsk	Russia	Record daily precipitation	28.3 mm (1.1 in)	42 of 100 (Notable)
Huntingdon	Canada	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Uppsala_Aut	Sweden	Record low maximum temperature	13.8 C (56.8 F)	41 of 100 (Notable)
Belhaven 1 SE	United States	Record low maximum temperature	21.1 C (70.0 F)	41 of 100 (Notable)
Sosva	Russia	Record daily precipitation	59.9 mm (2.4 in)	40 of 100 (Notable)
Izium	Ukraine	Record daily precipitation	34.1 mm (1.3 in)	40 of 100 (Notable)
Makuschino	Russia	Record daily precipitation	25.3 mm (1.0 in)	39 of 100 (Notable)
Marietta 5SW	United States	Record daily precipitation	96.5 mm (3.8 in)	39 of 100 (Notable)
Port Stanley	Canada	Record low minimum temperature	2.5 C (36.5 F)	38 of 100 (Notable)
Haparanda	Sweden	Record low minimum temperature	1.0 C (33.8 F)	38 of 100 (Notable)
Franklin	United States	Record low maximum temperature	18.3 C (64.9 F)	38 of 100 (Notable)
Weaverville	United States	Record high minimum temperature	15.0 C (59.0 F)	37 of 100 (Notable)
Grayling	United States	Record low minimum temperature	-1.1 C (30.0 F)	37 of 100 (Notable)
Billings	United States	Record daily precipitation	39.6 mm (1.6 in)	37 of 100 (Notable)
Winnemucca AP	United States	Record high minimum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Yakutat AP	United States	Record high maximum temperature	25.0 C (77.0 F)	37 of 100 (Notable)
Lubny	Ukraine	Record daily precipitation	43.2 mm (1.7 in)	36 of 100 (Notable)
Morrison	United States	Record low maximum temperature	16.7 C (62.1 F)	36 of 100 (Notable)
Independence	United States	Record low maximum temperature	16.7 C (62.1 F)	36 of 100 (Notable)
Dallas FAA AP	United States	Record daily precipitation	51.6 mm (2.0 in)	36 of 100 (Notable)
Webbers Falls 5 WSW	United States	Record low maximum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Grapevine Dam	United States	Record daily precipitation	32.8 mm (1.3 in)	35 of 100 (Notable)
Durham	Canada	Record low minimum temperature	1.7 C (35.1 F)	34 of 100 (Routine)
Woodstock	Canada	Record low minimum temperature	3.5 C (38.3 F)	34 of 100 (Routine)
High Springs	United States	Record high minimum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Pontiac Wwtp	United States	Record low minimum temperature	5.0 C (41.0 F)	34 of 100 (Routine)
Liberty 1 NE	United States	Record low minimum temperature	4.4 C (39.9 F)	34 of 100 (Routine)
Crosbyton	United States	Record daily precipitation	49.0 mm (1.9 in)	34 of 100 (Routine)
Elatma	Russia	Record low minimum temperature	2.7 C (36.9 F)	33 of 100 (Routine)
Poretskoye	Russia	Record low maximum temperature	15.2 C (59.4 F)	33 of 100 (Routine)
Bogucar	Russia	Record daily precipitation	36.1 mm (1.4 in)	33 of 100 (Routine)
Akhty	Russia	Record low minimum temperature	7.7 C (45.9 F)	33 of 100 (Routine)
Waycross 4 NE	United States	Record daily precipitation	68.6 mm (2.7 in)	33 of 100 (Routine)
Sandusky	United States	Record low minimum temperature	-3.3 C (26.1 F)	33 of 100 (Routine)
Madill	United States	Record daily precipitation	38.4 mm (1.5 in)	33 of 100 (Routine)
Center	United States	Record daily precipitation	58.9 mm (2.3 in)	33 of 100 (Routine)
Denison Dam	United States	Record daily precipitation	67.1 mm (2.6 in)	33 of 100 (Routine)
Dayton 1 WSW	United States	Record high maximum temperature	39.4 C (102.9 F)	33 of 100 (Routine)
Parnu	Estonia	Record low minimum temperature	4.8 C (40.6 F)	32 of 100 (Routine)
Hamburg Fuhlsbuettel	Germany	Record low maximum temperature	14.9 C (58.8 F)	32 of 100 (Routine)
Zinder	Niger	Record high minimum temperature	26.4 C (79.5 F)	32 of 100 (Routine)
Gavle	Sweden	Record low maximum temperature	13.2 C (55.8 F)	32 of 100 (Routine)
Conway Springs 4SW	United States	Record daily precipitation	63.5 mm (2.5 in)	32 of 100 (Routine)
Amite	United States	Record daily precipitation	46.0 mm (1.8 in)	32 of 100 (Routine)
Charlotte	United States	Record low minimum temperature	2.2 C (36.0 F)	32 of 100 (Routine)
E Tawas	United States	Record low maximum temperature	18.9 C (66.0 F)	32 of 100 (Routine)

Counts by Type and Timescale

860 records

Records set or tied on 20 August 1977 by type: Highest daily maximum 112, Lowest daily maximum 265, Highest daily minimum 105, Lowest daily minimum 186, Heaviest daily rainfall 192.

Records on 20 August 1977 by type
Record type	Records
Highest daily maximum	112
Lowest daily maximum	265
Highest daily minimum	105
Lowest daily minimum	186
Heaviest daily rainfall	192
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 1977 by timescale: all-time 2, monthly 33, daily 825.

How Much Records Were Beaten By

670 broken records

Margins by which the 670 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 142.5. Ties are not counted.

Top 20 by Significance

20 August 1977

Top 20 records on 20 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 1977	Lozova, UA	daily rain	43.0 mm (1.7 in)	38.0 mm (1.5 in)	40 years	56 of 100 (Notable)
20 August 1977	Antelope, US	daily rain	64.3 mm (2.5 in)	45.0 mm (1.8 in)	58 years	53 of 100 (Notable)
20 August 1977	Sahuaripa, MX	daily rain	63.8 mm (2.5 in)	42.5 mm (1.7 in)	31 years	52 of 100 (Notable)
20 August 1977	Nikopol, UA	daily rain	42.6 mm (1.7 in)	37.5 mm (1.5 in)	28 years	50 of 100 (Notable)
20 August 1977	Greenville Kgvl Radio, US	daily rain	71.1 mm (2.8 in)	44.9 mm (1.8 in)	54 years	49 of 100 (Notable)
20 August 1977	Brest, BY	daily rain	53.1 mm (2.1 in)	40.5 mm (1.6 in)	16 years	48 of 100 (Notable)
20 August 1977	Dallas Hensley Fld NAS, US	daily rain	149.9 mm (5.9 in)	142.5 mm (5.6 in)	19 years	48 of 100 (Notable)
20 August 1977	Svatove, UA	daily rain	37.5 mm (1.5 in)	29.5 mm (1.2 in)	32 years	47 of 100 (Notable)
20 August 1977	Roosevelt, US	daily rain	45.5 mm (1.8 in)	45.5 mm (1.8 in)	32 years	47 of 100 (Notable)
20 August 1977	Krasnohrad, UA	daily rain	29.7 mm (1.2 in)	20.1 mm (0.8 in)	36 years	46 of 100 (Notable)
20 August 1977	Walters, US	daily rain	82.8 mm (3.3 in)	57.4 mm (2.3 in)	16 years	45 of 100 (Notable)
20 August 1977	Bilovodsk, UA	monthly rain	49.6 mm (2.0 in)	17.4 mm (0.7 in)	4 years	44 of 100 (Notable)
20 August 1977	Fernandina Beach, US	daily rain	96.5 mm (3.8 in)	49.3 mm (1.9 in)	48 years	44 of 100 (Notable)
20 August 1977	Javlenka, KZ	daily rain	33.4 mm (1.3 in)	21.4 mm (0.8 in)	16 years	43 of 100 (Notable)
20 August 1977	Viljujsk, RU	daily rain	28.3 mm (1.1 in)	13.3 mm (0.5 in)	50 years	42 of 100 (Notable)
20 August 1977	Huntingdon, CA	daily low max	17.8 C (64.0 F)	0.5 C (0.9 F)	100 years	41 of 100 (Notable)
20 August 1977	Uppsala_Aut, SE	daily low max	13.8 C (56.8 F)	0.5 C (0.9 F)	125 years	41 of 100 (Notable)
20 August 1977	Belhaven 1 SE, US	daily low max	21.1 C (70.0 F)	5.0 C (9.0 F)	59 years	41 of 100 (Notable)
20 August 1977	Sosva, RU	monthly rain	59.9 mm (2.4 in)	11.4 mm (0.4 in)	35 years	40 of 100 (Notable)
20 August 1977	Izium, UA	daily rain	34.1 mm (1.3 in)	24.9 mm (1.0 in)	15 years	40 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 860 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 1977-08-20: 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	640
20 to 40	20
40 to 60	9
60 to 80	0
80 to 100	0
100 to 120	0
120 to 140	0
140 to 160	1