Weather Records on 30 August 1977

665 weather records were set or tied worldwide on 30 August 1977. Highest significance: Minneapolis-St Paul Intl AP, US.

Key Facts for 30 August 1977

On 30 August 1977, 665 weather records were set or tied at long-record stations worldwide.
215 were record highs and 107 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 54 monthly and 609 daily.
Minneapolis-St Paul Intl AP set an all-time record daily precipitation of 184.9 mm (7.3 in) on 30 August 1977.
Across 169 earlier years (1806 to 2026) the same calendar date averaged 422 records.

Record Map

665 stations

665 station records on 30 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Minneapolis-St Paul Intl AP	United States	Record daily precipitation	184.9 mm (7.3 in)	72 of 100 (Major)
Moscow U of I	United States	Record daily precipitation	26.9 mm (1.1 in)	67 of 100 (Major)
Flores (Dnocs)	Brazil	Record daily precipitation	28.2 mm (1.1 in)	61 of 100 (Major)
Melrose	Australia	Record daily precipitation	26.4 mm (1.0 in)	58 of 100 (Notable)
Wonganoo	Australia	Record daily precipitation	26.8 mm (1.1 in)	57 of 100 (Notable)
Grand Is Cntrl NE Rgnl AP	United States	Record daily precipitation	104.6 mm (4.1 in)	57 of 100 (Notable)
Sturt Meadows	Australia	Record daily precipitation	45.5 mm (1.8 in)	55 of 100 (Notable)
Zelinda	Brazil	Record daily precipitation	62.3 mm (2.5 in)	55 of 100 (Notable)
Hillview	Australia	Record daily precipitation	33.4 mm (1.3 in)	54 of 100 (Notable)
Franca	Brazil	Record daily precipitation	68.1 mm (2.7 in)	54 of 100 (Notable)
Leonora	Australia	Record daily precipitation	30.8 mm (1.2 in)	52 of 100 (Notable)
Milton Freewater	United States	Record daily precipitation	36.6 mm (1.4 in)	52 of 100 (Notable)
Pinnacles	Australia	Record daily precipitation	65.0 mm (2.6 in)	51 of 100 (Notable)
Usina Do Chicao	Brazil	Record daily precipitation	51.4 mm (2.0 in)	51 of 100 (Notable)
Bananal (Pcd)	Brazil	Record daily precipitation	102.5 mm (4.0 in)	49 of 100 (Notable)
Murchison Downs	Australia	Record daily precipitation	30.0 mm (1.2 in)	47 of 100 (Notable)
Sandstone	Australia	Record daily precipitation	28.2 mm (1.1 in)	45 of 100 (Notable)
Baependi	Brazil	Record daily precipitation	56.6 mm (2.2 in)	45 of 100 (Notable)
Ribeirao de Sao Joaquim	Brazil	Record daily precipitation	62.2 mm (2.4 in)	45 of 100 (Notable)
Morro Agudo	Brazil	Record daily precipitation	55.5 mm (2.2 in)	45 of 100 (Notable)
Tapiratiba	Brazil	Record daily precipitation	45.3 mm (1.8 in)	45 of 100 (Notable)
Ada	United States	Record daily precipitation	78.0 mm (3.1 in)	45 of 100 (Notable)
Fazenda Santa Cecilia	Brazil	Record daily precipitation	73.4 mm (2.9 in)	44 of 100 (Notable)
Dayton 1 WSW	United States	Record daily precipitation	31.0 mm (1.2 in)	44 of 100 (Notable)
Usina de Varginha	Brazil	Record daily precipitation	72.2 mm (2.8 in)	43 of 100 (Notable)
Barretos	Brazil	Record daily precipitation	50.9 mm (2.0 in)	43 of 100 (Notable)
Kennewick	United States	Record daily precipitation	28.2 mm (1.1 in)	43 of 100 (Notable)
Kuranda Railway Station	Australia	Record daily precipitation	31.0 mm (1.2 in)	42 of 100 (Notable)
Santa Isabel Do Rio Preto	Brazil	Record daily precipitation	53.1 mm (2.1 in)	42 of 100 (Notable)
Vila Carmem	Brazil	Record daily precipitation	65.1 mm (2.6 in)	42 of 100 (Notable)
Excame	Mexico	Record daily precipitation	57.2 mm (2.3 in)	42 of 100 (Notable)
Usina Couro Do Cervo	Brazil	Record daily precipitation	58.0 mm (2.3 in)	41 of 100 (Notable)
Ituverava	Brazil	Record daily precipitation	27.7 mm (1.1 in)	41 of 100 (Notable)
Usina Chibarro (Cpfl)	Brazil	Record daily precipitation	39.8 mm (1.6 in)	41 of 100 (Notable)
Berkeley	United States	Record high minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Electron Headworks	United States	Record daily precipitation	31.2 mm (1.2 in)	41 of 100 (Notable)
Hatton 9 SE	United States	Record daily precipitation	25.1 mm (1.0 in)	41 of 100 (Notable)
Yakabindie	Australia	Record daily precipitation	35.4 mm (1.4 in)	40 of 100 (Notable)
Sydney (Observatory Hill)	Australia	Record high maximum temperature	28.3 C (82.9 F)	40 of 100 (Notable)
Aiuruoca	Brazil	Record daily precipitation	65.0 mm (2.6 in)	39 of 100 (Notable)
Porto Tiradentes	Brazil	Record daily precipitation	47.2 mm (1.9 in)	38 of 100 (Notable)
Usina Gaviao Peixoto (Cpfl)	Brazil	Record daily precipitation	34.1 mm (1.3 in)	38 of 100 (Notable)
Booylgoo Spring	Australia	Record daily precipitation	33.6 mm (1.3 in)	37 of 100 (Notable)
Santa Rita Do Jacutinga	Brazil	Record daily precipitation	64.0 mm (2.5 in)	37 of 100 (Notable)
Colina	Brazil	Record daily precipitation	60.9 mm (2.4 in)	37 of 100 (Notable)
Galeana	Mexico	Record high minimum temperature	23.9 C (75.0 F)	37 of 100 (Notable)
Sveg	Sweden	Record high minimum temperature	13.0 C (55.4 F)	37 of 100 (Notable)
Kelso	United States	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Cogla Downs	Australia	Record daily precipitation	25.0 mm (1.0 in)	36 of 100 (Notable)
Albacete Los Llanos	Spain	Record low minimum temperature	6.0 C (42.8 F)	36 of 100 (Notable)
Jefferson City Wtp	United States	Record daily precipitation	50.8 mm (2.0 in)	36 of 100 (Notable)
Luminarias	Brazil	Record daily precipitation	51.2 mm (2.0 in)	35 of 100 (Notable)
Natividade da Serra	Brazil	Record daily precipitation	26.0 mm (1.0 in)	35 of 100 (Notable)
Fazenda Agulhas Negras	Brazil	Record daily precipitation	30.0 mm (1.2 in)	34 of 100 (Routine)
Yeelirrie	Australia	Record daily precipitation	41.2 mm (1.6 in)	33 of 100 (Routine)
Itumirim	Brazil	Record daily precipitation	37.0 mm (1.5 in)	33 of 100 (Routine)
Fazenda Cascata	Brazil	Record daily precipitation	38.7 mm (1.5 in)	33 of 100 (Routine)
Melitopol	Ukraine	Record daily precipitation	34.8 mm (1.4 in)	33 of 100 (Routine)
Park Falls Dnr HQ	United States	Record daily precipitation	45.2 mm (1.8 in)	33 of 100 (Routine)
Three Rivers	Australia	Record daily precipitation	30.2 mm (1.2 in)	32 of 100 (Routine)

Counts by Type and Timescale

665 records

Records set or tied on 30 August 1977 by type: Highest daily maximum 66, Lowest daily maximum 62, Highest daily minimum 149, Lowest daily minimum 45, Heaviest daily rainfall 343.

Records on 30 August 1977 by type
Record type	Records
Highest daily maximum	66
Lowest daily maximum	62
Highest daily minimum	149
Lowest daily minimum	45
Heaviest daily rainfall	343
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 August 1977 by timescale: all-time 2, monthly 54, daily 609.

How Much Records Were Beaten By

539 broken records

Margins by which the 539 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 81.5. Ties are not counted.

Top 20 by Significance

30 August 1977

Top 20 records on 30 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 August 1977	Minneapolis-St Paul Intl AP, US	all-time rain	184.9 mm (7.3 in)	81.5 mm (3.2 in)	28 years	72 of 100 (Major)
30 August 1977	Moscow U of I, US	daily rain	26.9 mm (1.1 in)	20.5 mm (0.8 in)	79 years	67 of 100 (Major)
30 August 1977	Flores (Dnocs), BR	daily rain	28.2 mm (1.1 in)	24.8 mm (1.0 in)	64 years	61 of 100 (Major)
30 August 1977	Melrose, AU	daily rain	26.4 mm (1.0 in)	22.8 mm (0.9 in)	46 years	58 of 100 (Notable)
30 August 1977	Wonganoo, AU	daily rain	26.8 mm (1.1 in)	25.5 mm (1.0 in)	44 years	57 of 100 (Notable)
30 August 1977	Grand Is Cntrl NE Rgnl AP, US	monthly rain	104.6 mm (4.1 in)	46.7 mm (1.8 in)	12 years	57 of 100 (Notable)
30 August 1977	Sturt Meadows, AU	daily rain	45.5 mm (1.8 in)	38.1 mm (1.5 in)	28 years	55 of 100 (Notable)
30 August 1977	Zelinda, BR	monthly rain	62.3 mm (2.5 in)	25.9 mm (1.0 in)	15 years	55 of 100 (Notable)
30 August 1977	Hillview, AU	daily rain	33.4 mm (1.3 in)	23.2 mm (0.9 in)	46 years	54 of 100 (Notable)
30 August 1977	Franca, BR	monthly rain	68.1 mm (2.7 in)	34.7 mm (1.4 in)	1 year	54 of 100 (Notable)
30 August 1977	Leonora, AU	daily rain	30.8 mm (1.2 in)	25.0 mm (1.0 in)	16 years	52 of 100 (Notable)
30 August 1977	Milton Freewater, US	monthly rain	36.6 mm (1.4 in)	12.5 mm (0.5 in)	14 years	52 of 100 (Notable)
30 August 1977	Pinnacles, AU	monthly rain	65.0 mm (2.6 in)	21.3 mm (0.8 in)	19 years	51 of 100 (Notable)
30 August 1977	Usina Do Chicao, BR	monthly rain	51.4 mm (2.0 in)	24.4 mm (1.0 in)	1 year	51 of 100 (Notable)
30 August 1977	Bananal (Pcd), BR	monthly rain	102.5 mm (4.0 in)	30.5 mm (1.2 in)	20 years	49 of 100 (Notable)
30 August 1977	Murchison Downs, AU	daily rain	30.0 mm (1.2 in)	20.1 mm (0.8 in)	46 years	47 of 100 (Notable)
30 August 1977	Sandstone, AU	daily rain	28.2 mm (1.1 in)	15.8 mm (0.6 in)	28 years	45 of 100 (Notable)
30 August 1977	Baependi, BR	monthly rain	56.6 mm (2.2 in)	25.5 mm (1.0 in)	1 year	45 of 100 (Notable)
30 August 1977	Ribeirao de Sao Joaquim, BR	monthly rain	62.2 mm (2.4 in)	23.2 mm (0.9 in)	15 years	45 of 100 (Notable)
30 August 1977	Morro Agudo, BR	daily rain	55.5 mm (2.2 in)	47.6 mm (1.9 in)	7 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

1806 to 1977

Records set or tied on this calendar date in each year from 1806 to 1977. 1977 had 665 records.

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

Records on 08-30 in each year
Year	Records
1806	1
1807	4
1813	1
1814	2
1827	1
1829	1
1835	1
1838	1
1839	1
1845	4
1850	1
1851	2
1855	1
1857	1
1859	1
1864	2
1867	1
1869	1
1870	2
1874	1
1875	2
1876	1
1877	2
1878	1
1880	4
1881	2
1882	1
1884	1
1885	5
1886	7
1887	1
1888	1
1889	2
1890	5
1891	1
1892	3
1893	3
1894	2
1895	1
1896	1
1897	3
1898	3
1899	2
1900	6
1901	8
1902	12
1903	19
1904	13
1905	23
1906	29
1907	8
1908	10
1909	37
1910	15
1911	41
1912	60
1913	22
1914	23
1915	47
1916	17
1917	50
1918	45
1919	17
1920	78
1921	100
1922	65
1923	61
1924	283
1925	167
1926	173
1927	109
1928	327
1929	208
1930	245
1931	192
1932	1,102
1933	274
1934	519
1935	476
1936	191
1937	418
1938	233
1939	401
1940	346
1941	422
1942	385
1943	487
1944	491
1945	455
1946	545
1947	599
1948	519
1949	240
1950	481
1951	1,091
1952	316
1953	1,124
1954	516
1955	417
1956	479
1957	321
1958	363
1959	546
1960	356
1961	573
1962	387
1963	442
1964	422
1965	1,118
1966	500
1967	536
1968	729
1969	522
1970	423
1971	443
1972	579
1973	646
1974	838
1975	664
1976	679
1977	665
1978	825
1979	517
1980	572
1981	684
1982	770
1983	696
1984	1,127
1985	629
1986	1,768
1987	638
1988	881
1989	791
1990	983
1991	938
1992	1,697
1993	1,200
1994	601
1995	940
1996	1,385
1997	960
1998	1,278
1999	864
2000	1,189
2001	750
2002	801
2003	1,226
2004	1,087
2005	1,500
2006	989
2007	1,300
2008	678
2009	1,251
2010	1,552
2011	994
2012	1,087
2013	644
2014	558
2015	1,074
2016	552
2017	924
2018	616
2019	755
2020	671
2021	429
2022	1,077
2023	651
2024	912
2025	324
2026	733

Download the Data

Data for records on 1977-08-30: 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	497
20 to 40	37
40 to 60	4
60 to 80	0
80 to 100	1