Weather Records on 31 August 1977

621 weather records were set or tied worldwide on 31 August 1977. Highest significance: Cumberland, US.

Key Facts for 31 August 1977

On 31 August 1977, 621 weather records were set or tied at long-record stations worldwide.
143 were record highs and 131 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 24 monthly and 594 daily.
Cumberland set a daily record precipitation of 87.6 mm (3.4 in) on 31 August 1977.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 435 records.

Record Map

621 stations

621 station records on 31 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cumberland	United States	Record daily precipitation	87.6 mm (3.4 in)	61 of 100 (Major)
Maple Plain	United States	Record daily precipitation	78.7 mm (3.1 in)	61 of 100 (Major)
Greenfield	United States	Record daily precipitation	76.2 mm (3.0 in)	53 of 100 (Notable)
Eagle Rvr	United States	Record daily precipitation	95.8 mm (3.8 in)	52 of 100 (Notable)
El-Golea	Algeria	Record low minimum temperature	13.4 C (56.1 F)	51 of 100 (Notable)
Seward	United States	Record daily precipitation	117.1 mm (4.6 in)	50 of 100 (Notable)
Mellen 4 NE	United States	Record daily precipitation	94.2 mm (3.7 in)	50 of 100 (Notable)
Alhandra	Brazil	Record daily precipitation	56.3 mm (2.2 in)	49 of 100 (Notable)
Yakabindie	Australia	Record daily precipitation	28.0 mm (1.1 in)	48 of 100 (Notable)
Imuris (Smn)	Mexico	Record daily precipitation	65.3 mm (2.6 in)	48 of 100 (Notable)
Charlevoix	United States	Record daily precipitation	57.2 mm (2.3 in)	48 of 100 (Notable)
Nebraska City 2NW	United States	Record daily precipitation	102.6 mm (4.0 in)	48 of 100 (Notable)
Bad Lauchstadt	Germany	Record daily precipitation	37.1 mm (1.5 in)	47 of 100 (Notable)
Itajobi	Brazil	Record daily precipitation	34.4 mm (1.4 in)	46 of 100 (Notable)
Nueva Casas Grandes	Mexico	Record daily precipitation	51.5 mm (2.0 in)	46 of 100 (Notable)
Nuevo Casas Grandes (Dge)	Mexico	Record daily precipitation	51.3 mm (2.0 in)	46 of 100 (Notable)
Corning	United States	Record daily precipitation	86.4 mm (3.4 in)	46 of 100 (Notable)
Red Oak	United States	Record daily precipitation	88.9 mm (3.5 in)	46 of 100 (Notable)
Sidney 1SSE	United States	Record daily precipitation	105.9 mm (4.2 in)	46 of 100 (Notable)
Greeley	United States	Record daily precipitation	54.9 mm (2.2 in)	45 of 100 (Notable)
Creston 2 SW	United States	Record daily precipitation	69.9 mm (2.8 in)	44 of 100 (Notable)
Georgetown Wtr Wks	United States	Record daily precipitation	56.9 mm (2.2 in)	44 of 100 (Notable)
Cambridge	United States	Record daily precipitation	62.0 mm (2.4 in)	44 of 100 (Notable)
Rest Lake	United States	Record daily precipitation	88.4 mm (3.5 in)	44 of 100 (Notable)
Des Moines Intl AP	United States	Record daily precipitation	71.1 mm (2.8 in)	44 of 100 (Notable)
Coober Pedy (McDouall Peak)	Australia	Record daily precipitation	26.0 mm (1.0 in)	43 of 100 (Notable)
Inga	Brazil	Record daily precipitation	28.0 mm (1.1 in)	43 of 100 (Notable)
Ojo de Agua	Mexico	Record low minimum temperature	10.6 C (51.1 F)	43 of 100 (Notable)
Lyons	United States	Record daily precipitation	69.3 mm (2.7 in)	43 of 100 (Notable)
Buritizal	Brazil	Record daily precipitation	52.6 mm (2.1 in)	42 of 100 (Notable)
Hastings Dam 2	United States	Record daily precipitation	80.8 mm (3.2 in)	42 of 100 (Notable)
Bloomer	United States	Record daily precipitation	100.1 mm (3.9 in)	42 of 100 (Notable)
Rainbow Rsvr Tomahawk	United States	Record daily precipitation	65.3 mm (2.6 in)	42 of 100 (Notable)
Ravenna	United States	Record daily precipitation	52.8 mm (2.1 in)	41 of 100 (Notable)
Flambeau Rsvr	United States	Record daily precipitation	83.8 mm (3.3 in)	41 of 100 (Notable)
Solon Springs	United States	Record daily precipitation	127.3 mm (5.0 in)	41 of 100 (Notable)
Timbauba	Brazil	Record daily precipitation	26.8 mm (1.1 in)	39 of 100 (Notable)
New London	United States	Record daily precipitation	96.3 mm (3.8 in)	39 of 100 (Notable)
River Falls	United States	Record daily precipitation	118.6 mm (4.7 in)	39 of 100 (Notable)
Sturt Meadows	Australia	Record daily precipitation	33.0 mm (1.3 in)	38 of 100 (Notable)
Winterset 4N	United States	Record daily precipitation	62.5 mm (2.5 in)	38 of 100 (Notable)
York	United States	Record daily precipitation	97.8 mm (3.9 in)	38 of 100 (Notable)
Dayville	United States	Record low maximum temperature	16.1 C (61.0 F)	38 of 100 (Notable)
Long Lake Dam	United States	Record daily precipitation	91.4 mm (3.6 in)	38 of 100 (Notable)
Sugar Camp	United States	Record daily precipitation	68.6 mm (2.7 in)	38 of 100 (Notable)
Bad Kosen	Germany	Record daily precipitation	33.3 mm (1.3 in)	37 of 100 (Notable)
Ericson 8 WNW	United States	Record daily precipitation	55.9 mm (2.2 in)	37 of 100 (Notable)
Gresham 3W	United States	Record daily precipitation	96.0 mm (3.8 in)	37 of 100 (Notable)
Gospic	Croatia	Record high minimum temperature	16.7 C (62.1 F)	36 of 100 (Notable)
Stambaugh 2SSE	United States	Record daily precipitation	71.4 mm (2.8 in)	36 of 100 (Notable)
David City 4E	United States	Record daily precipitation	102.9 mm (4.1 in)	36 of 100 (Notable)
Raymond 2E	United States	Record daily precipitation	80.0 mm (3.1 in)	36 of 100 (Notable)
Ellsworth 1E	United States	Record daily precipitation	99.6 mm (3.9 in)	36 of 100 (Notable)
Ironwood	United States	Record daily precipitation	70.4 mm (2.8 in)	35 of 100 (Notable)
Bradshaw	United States	Record daily precipitation	97.5 mm (3.8 in)	35 of 100 (Notable)
Wahoo	United States	Record daily precipitation	85.1 mm (3.4 in)	35 of 100 (Notable)
Rhinelander	United States	Record daily precipitation	67.6 mm (2.7 in)	35 of 100 (Notable)
Grand Marais	United States	Record daily precipitation	66.3 mm (2.6 in)	34 of 100 (Routine)
Milaca	United States	Record daily precipitation	72.9 mm (2.9 in)	34 of 100 (Routine)
Longmire Rainier Nps	United States	Record low maximum temperature	7.2 C (45.0 F)	34 of 100 (Routine)

Counts by Type and Timescale

621 records

Records set or tied on 31 August 1977 by type: Highest daily maximum 31, Lowest daily maximum 69, Highest daily minimum 112, Lowest daily minimum 62, Heaviest daily rainfall 346, Heaviest daily snowfall 1.

Records on 31 August 1977 by type
Record type	Records
Highest daily maximum	31
Lowest daily maximum	69
Highest daily minimum	112
Lowest daily minimum	62
Heaviest daily rainfall	346
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 31 August 1977 by timescale: all-time 3, monthly 24, daily 594.

How Much Records Were Beaten By

520 broken records

Margins by which the 520 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 67.6. Ties are not counted.

Top 20 by Significance

31 August 1977

Top 20 records on 31 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 1977	Cumberland, US	daily rain	87.6 mm (3.4 in)	59.4 mm (2.3 in)	47 years	61 of 100 (Major)
31 August 1977	Maple Plain, US	daily rain	78.7 mm (3.1 in)	39.3 mm (1.5 in)	79 years	61 of 100 (Major)
31 August 1977	Greenfield, US	daily rain	76.2 mm (3.0 in)	37.1 mm (1.5 in)	75 years	53 of 100 (Notable)
31 August 1977	Eagle Rvr, US	daily rain	95.8 mm (3.8 in)	62.3 mm (2.5 in)	32 years	52 of 100 (Notable)
31 August 1977	El-Golea, DZ	monthly low min	13.4 C (56.1 F)	2.6 C (4.7 F)	83 years	51 of 100 (Notable)
31 August 1977	Seward, US	daily rain	117.1 mm (4.6 in)	67.6 mm (2.7 in)	8 years	50 of 100 (Notable)
31 August 1977	Mellen 4 NE, US	daily rain	94.2 mm (3.7 in)	48.2 mm (1.9 in)	40 years	50 of 100 (Notable)
31 August 1977	Alhandra, BR	daily rain	56.3 mm (2.2 in)	46.3 mm (1.8 in)	19 years	49 of 100 (Notable)
31 August 1977	Yakabindie, AU	daily rain	28.0 mm (1.1 in)	19.4 mm (0.8 in)	20 years	48 of 100 (Notable)
31 August 1977	Imuris (Smn), MX	daily rain	65.3 mm (2.6 in)	45.5 mm (1.8 in)	28 years	48 of 100 (Notable)
31 August 1977	Charlevoix, US	daily rain	57.2 mm (2.3 in)	28.0 mm (1.1 in)	39 years	48 of 100 (Notable)
31 August 1977	Nebraska City 2NW, US	daily rain	102.6 mm (4.0 in)	65.8 mm (2.6 in)	15 years	48 of 100 (Notable)
31 August 1977	Bad Lauchstadt, DE	daily rain	37.1 mm (1.5 in)	19.1 mm (0.8 in)	46 years	47 of 100 (Notable)
31 August 1977	Itajobi, BR	daily rain	34.4 mm (1.4 in)	31.2 mm (1.2 in)	11 years	46 of 100 (Notable)
31 August 1977	Nueva Casas Grandes, MX	daily rain	51.5 mm (2.0 in)	39.0 mm (1.5 in)	10 years	46 of 100 (Notable)
31 August 1977	Nuevo Casas Grandes (Dge), MX	daily rain	51.3 mm (2.0 in)	38.9 mm (1.5 in)	10 years	46 of 100 (Notable)
31 August 1977	Corning, US	daily rain	86.4 mm (3.4 in)	43.7 mm (1.7 in)	39 years	46 of 100 (Notable)
31 August 1977	Red Oak, US	daily rain	88.9 mm (3.5 in)	52.6 mm (2.1 in)	15 years	46 of 100 (Notable)
31 August 1977	Sidney 1SSE, US	daily rain	105.9 mm (4.2 in)	46.5 mm (1.8 in)	15 years	46 of 100 (Notable)
31 August 1977	Greeley, US	daily rain	54.9 mm (2.2 in)	25.2 mm (1.0 in)	68 years	45 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

1796 to 1977

Records set or tied on this calendar date in each year from 1796 to 1977. 1977 had 621 records.

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

Records on 08-31 in each year
Year	Records
1796	1
1806	1
1807	2
1813	1
1814	1
1816	1
1827	1
1836	1
1846	1
1849	1
1851	1
1856	2
1858	1
1859	1
1860	1
1861	1
1863	1
1867	1
1869	1
1873	1
1875	1
1876	1
1877	2
1879	2
1881	3
1882	2
1885	1
1886	5
1887	1
1889	1
1890	2
1892	3
1893	1
1894	1
1895	1
1896	1
1897	5
1898	10
1899	4
1900	3
1901	5
1902	5
1903	16
1904	13
1905	8
1906	47
1907	6
1908	12
1909	39
1910	20
1911	31
1912	34
1913	40
1914	23
1915	71
1916	7
1917	60
1918	58
1919	25
1920	46
1921	86
1922	58
1923	63
1924	232
1925	111
1926	148
1927	103
1928	201
1929	300
1930	243
1931	192
1932	807
1933	424
1934	381
1935	540
1936	226
1937	508
1938	324
1939	296
1940	400
1941	528
1942	422
1943	650
1944	638
1945	572
1946	545
1947	473
1948	367
1949	409
1950	662
1951	910
1952	388
1953	1,054
1954	633
1955	539
1956	734
1957	317
1958	417
1959	496
1960	366
1961	625
1962	432
1963	415
1964	591
1965	886
1966	830
1967	952
1968	562
1969	474
1970	558
1971	326
1972	287
1973	793
1974	587
1975	658
1976	732
1977	621
1978	891
1979	400
1980	701
1981	692
1982	586
1983	788
1984	866
1985	854
1986	1,218
1987	836
1988	570
1989	622
1990	966
1991	848
1992	1,274
1993	1,286
1994	1,139
1995	1,077
1996	1,451
1997	943
1998	1,163
1999	988
2000	1,545
2001	944
2002	852
2003	1,232
2004	963
2005	1,782
2006	1,147
2007	1,110
2008	870
2009	1,224
2010	1,490
2011	994
2012	932
2013	771
2014	458
2015	1,074
2016	599
2017	596
2018	366
2019	781
2020	737
2021	553
2022	1,191
2023	600
2024	766
2025	307
2026	595

Download the Data

Data for records on 1977-08-31: 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	398
10 to 20	73
20 to 30	10
30 to 40	18
40 to 50	14
50 to 60	3
60 to 70	4