Weather Records on 7 September 1977

674 weather records were set or tied worldwide on 7 September 1977. Highest significance: Ackerman, US.

Key Facts for 7 September 1977

On 7 September 1977, 674 weather records were set or tied at long-record stations worldwide.
266 were record highs and 43 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 46 monthly and 624 daily.
Ackerman set an all-time record daily precipitation of 222.5 mm (8.8 in) on 7 September 1977.
Across 165 earlier years (1802 to 2026) the same calendar date averaged 449 records.

Record Map

674 stations

674 station records on 7 September 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 7 September 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ackerman	United States	Record daily precipitation	222.5 mm (8.8 in)	60 of 100 (Major)
Major Gercino	Brazil	Record daily precipitation	128.6 mm (5.1 in)	58 of 100 (Notable)
Guntersville	United States	Record daily precipitation	100.8 mm (4.0 in)	57 of 100 (Notable)
Waterville 2	United States	Record daily precipitation	63.5 mm (2.5 in)	56 of 100 (Notable)
Chattanooga AP	United States	Record daily precipitation	161.8 mm (6.4 in)	56 of 100 (Notable)
Alejskaja	Russia	Record daily precipitation	25.4 mm (1.0 in)	54 of 100 (Notable)
Canton 1 SW	United States	Record daily precipitation	111.0 mm (4.4 in)	54 of 100 (Notable)
Knoxville AP	United States	Record daily precipitation	64.0 mm (2.5 in)	54 of 100 (Notable)
Malin Head	Ireland	Record daily precipitation	36.5 mm (1.4 in)	52 of 100 (Notable)
Union	United States	Record daily precipitation	81.3 mm (3.2 in)	52 of 100 (Notable)
Dover	United States	Record daily precipitation	78.7 mm (3.1 in)	50 of 100 (Notable)
Santa Rosa	Brazil	Record daily precipitation	32.2 mm (1.3 in)	48 of 100 (Notable)
Falkville 1 E	United States	Record daily precipitation	74.7 mm (2.9 in)	48 of 100 (Notable)
Chickamauga 2 SW	United States	Record daily precipitation	96.0 mm (3.8 in)	45 of 100 (Notable)
Enka	United States	Record daily precipitation	128.0 mm (5.0 in)	45 of 100 (Notable)
Long Creek	United States	Record daily precipitation	152.4 mm (6.0 in)	45 of 100 (Notable)
Dorado 2 WNW	Puerto Rico [United States]	Record daily precipitation	61.0 mm (2.4 in)	44 of 100 (Notable)
Yajlju	Russia	Record daily precipitation	36.6 mm (1.4 in)	44 of 100 (Notable)
Boaz	United States	Record daily precipitation	105.4 mm (4.1 in)	44 of 100 (Notable)
Joinville (Rvpsc)	Brazil	Record daily precipitation	115.0 mm (4.5 in)	43 of 100 (Notable)
Kondoma	Russia	Record daily precipitation	39.5 mm (1.6 in)	43 of 100 (Notable)
Oneonta	United States	Record daily precipitation	146.1 mm (5.8 in)	43 of 100 (Notable)
Reform	United States	Record daily precipitation	87.6 mm (3.4 in)	43 of 100 (Notable)
Garcia	Brazil	Record daily precipitation	96.2 mm (3.8 in)	42 of 100 (Notable)
Serrana	Brazil	Record daily precipitation	50.0 mm (2.0 in)	42 of 100 (Notable)
Crawford 5 W	United States	Record daily precipitation	77.5 mm (3.1 in)	41 of 100 (Notable)
Japaratuba	Brazil	Record daily precipitation	37.0 mm (1.5 in)	40 of 100 (Notable)
Cordova 2 ENE	United States	Record daily precipitation	86.4 mm (3.4 in)	40 of 100 (Notable)
Majors Creek (the Old School)	Australia	Record daily precipitation	47.4 mm (1.9 in)	39 of 100 (Notable)
Cravinhos	Brazil	Record daily precipitation	65.7 mm (2.6 in)	39 of 100 (Notable)
Kosciusko	United States	Record daily precipitation	62.2 mm (2.4 in)	39 of 100 (Notable)
Louisville	United States	Record daily precipitation	189.7 mm (7.5 in)	39 of 100 (Notable)
Elrod	United States	Record daily precipitation	91.4 mm (3.6 in)	38 of 100 (Notable)
Dungowan Station	Australia	Record daily precipitation	30.0 mm (1.2 in)	37 of 100 (Notable)
Luiz Alves	Brazil	Record daily precipitation	59.3 mm (2.3 in)	37 of 100 (Notable)
Canton 4N	United States	Record daily precipitation	31.2 mm (1.2 in)	35 of 100 (Notable)
Altinopolis	Brazil	Record daily precipitation	42.9 mm (1.7 in)	34 of 100 (Routine)
Cartwright	Canada	Record daily precipitation	44.2 mm (1.7 in)	34 of 100 (Routine)
Ponce 4 E	Puerto Rico [United States]	Record low maximum temperature	27.8 C (82.0 F)	34 of 100 (Routine)
Saint Bernard	United States	Record daily precipitation	116.8 mm (4.6 in)	34 of 100 (Routine)
Tuscaloosa Oliver Dam	United States	Record daily precipitation	130.0 mm (5.1 in)	34 of 100 (Routine)
W Blocton	United States	Record daily precipitation	127.0 mm (5.0 in)	34 of 100 (Routine)
Highlands	United States	Record daily precipitation	127.8 mm (5.0 in)	34 of 100 (Routine)
Itapebi	Brazil	Record daily precipitation	28.2 mm (1.1 in)	33 of 100 (Routine)
Colina	Brazil	Record daily precipitation	37.3 mm (1.5 in)	33 of 100 (Routine)
Fazenda Guaxupe	Brazil	Record daily precipitation	25.0 mm (1.0 in)	33 of 100 (Routine)
Ft Payne	United States	Record daily precipitation	55.9 mm (2.2 in)	33 of 100 (Routine)
Columbus 4 ESE	United States	Record daily precipitation	71.9 mm (2.8 in)	33 of 100 (Routine)
Edinburg	United States	Record daily precipitation	68.6 mm (2.7 in)	33 of 100 (Routine)
Wamsutter	United States	Record high maximum temperature	30.6 C (87.1 F)	33 of 100 (Routine)
Usina Esmeril (Cpfl) B4-005	Brazil	Record daily precipitation	56.4 mm (2.2 in)	32 of 100 (Routine)
Batatais	Brazil	Record daily precipitation	43.0 mm (1.7 in)	32 of 100 (Routine)
Comercio	Brazil	Record daily precipitation	30.0 mm (1.2 in)	32 of 100 (Routine)
Zerbst	Germany	Record high minimum temperature	16.4 C (61.5 F)	32 of 100 (Routine)
Fajardo	Puerto Rico [United States]	Record daily precipitation	75.2 mm (3.0 in)	32 of 100 (Routine)
Ermakovskoe	Russia	Record daily precipitation	27.0 mm (1.1 in)	32 of 100 (Routine)
Clayton	United States	Record daily precipitation	62.0 mm (2.4 in)	32 of 100 (Routine)
Garden City	United States	Record daily precipitation	107.4 mm (4.2 in)	32 of 100 (Routine)
Gorgas 2 ENE	United States	Record daily precipitation	66.0 mm (2.6 in)	32 of 100 (Routine)
Haleyville	United States	Record daily precipitation	55.1 mm (2.2 in)	32 of 100 (Routine)

Counts by Type and Timescale

674 records

Records set or tied on 7 September 1977 by type: Highest daily maximum 126, Lowest daily maximum 26, Highest daily minimum 140, Lowest daily minimum 17, Heaviest daily rainfall 365.

Records on 7 September 1977 by type
Record type	Records
Highest daily maximum	126
Lowest daily maximum	26
Highest daily minimum	140
Lowest daily minimum	17
Heaviest daily rainfall	365
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 7 September 1977 by timescale: all-time 4, monthly 46, daily 624.

How Much Records Were Beaten By

525 broken records

Margins by which the 525 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 92.7. Ties are not counted.

Top 20 by Significance

7 September 1977

Top 20 records on 7 September 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 September 1977	Ackerman, US	all-time rain	222.5 mm (8.8 in)	54.4 mm (2.1 in)	4 years	60 of 100 (Major)
7 September 1977	Major Gercino, BR	monthly rain	128.6 mm (5.1 in)	66.0 mm (2.6 in)	19 years	58 of 100 (Notable)
7 September 1977	Guntersville, US	daily rain	100.8 mm (4.0 in)	92.7 mm (3.6 in)	34 years	57 of 100 (Notable)
7 September 1977	Waterville 2, US	daily rain	63.5 mm (2.5 in)	50.8 mm (2.0 in)	40 years	56 of 100 (Notable)
7 September 1977	Chattanooga AP, US	all-time rain	161.8 mm (6.4 in)	38.6 mm (1.5 in)	34 years	56 of 100 (Notable)
7 September 1977	Alejskaja, RU	daily rain	25.4 mm (1.0 in)	17.2 mm (0.7 in)	35 years	54 of 100 (Notable)
7 September 1977	Canton 1 SW, US	monthly rain	111.0 mm (4.4 in)	46.5 mm (1.8 in)	1 year	54 of 100 (Notable)
7 September 1977	Knoxville AP, US	daily rain	64.0 mm (2.5 in)	46.2 mm (1.8 in)	27 years	54 of 100 (Notable)
7 September 1977	Malin Head, IE	daily rain	36.5 mm (1.4 in)	12.4 mm (0.5 in)	68 years	52 of 100 (Notable)
7 September 1977	Union, US	daily rain	81.3 mm (3.2 in)	55.4 mm (2.2 in)	32 years	52 of 100 (Notable)
7 September 1977	Dover, US	daily rain	78.7 mm (3.1 in)	33.2 mm (1.3 in)	81 years	50 of 100 (Notable)
7 September 1977	Santa Rosa, BR	monthly rain	32.2 mm (1.3 in)	15.0 mm (0.6 in)	5 years	48 of 100 (Notable)
7 September 1977	Falkville 1 E, US	daily rain	74.7 mm (2.9 in)	62.5 mm (2.5 in)	30 years	48 of 100 (Notable)
7 September 1977	Chickamauga 2 SW, US	daily rain	96.0 mm (3.8 in)	73.9 mm (2.9 in)	2 years	45 of 100 (Notable)
7 September 1977	Enka, US	all-time rain	128.0 mm (5.0 in)	13.4 mm (0.5 in)	40 years	45 of 100 (Notable)
7 September 1977	Long Creek, US	monthly rain	152.4 mm (6.0 in)	41.1 mm (1.6 in)	28 years	45 of 100 (Notable)
7 September 1977	Dorado 2 WNW, PR	daily rain	61.0 mm (2.4 in)	39.2 mm (1.5 in)	30 years	44 of 100 (Notable)
7 September 1977	Yajlju, RU	daily rain	36.6 mm (1.4 in)	19.4 mm (0.8 in)	44 years	44 of 100 (Notable)
7 September 1977	Boaz, US	daily rain	105.4 mm (4.1 in)	69.1 mm (2.7 in)	2 years	44 of 100 (Notable)
7 September 1977	Joinville (Rvpsc), BR	monthly rain	115.0 mm (4.5 in)	27.4 mm (1.1 in)	0 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

1802 to 1977

Records set or tied on this calendar date in each year from 1802 to 1977. 1977 had 674 records.

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

Records on 09-07 in each year
Year	Records
1802	2
1814	2
1816	1
1833	1
1845	2
1847	1
1848	1
1850	1
1852	1
1856	1
1859	1
1860	2
1861	1
1864	2
1865	3
1868	1
1870	1
1871	4
1872	3
1873	1
1877	4
1878	1
1879	1
1881	2
1882	1
1883	2
1886	1
1887	3
1888	1
1889	1
1890	2
1891	7
1892	3
1894	8
1895	7
1896	1
1897	2
1898	8
1899	3
1900	1
1901	6
1902	3
1903	7
1904	8
1905	20
1906	8
1907	5
1908	26
1909	11
1910	15
1911	20
1912	39
1913	20
1914	29
1915	28
1916	39
1917	44
1918	35
1919	184
1920	375
1921	80
1922	98
1923	125
1924	232
1925	303
1926	117
1927	147
1928	130
1929	355
1930	108
1931	400
1932	478
1933	287
1934	566
1935	275
1936	370
1937	260
1938	348
1939	634
1940	226
1941	451
1942	415
1943	591
1944	519
1945	482
1946	356
1947	625
1948	353
1949	705
1950	704
1951	342
1952	301
1953	446
1954	390
1955	405
1956	752
1957	498
1958	570
1959	583
1960	763
1961	312
1962	729
1963	448
1964	463
1965	672
1966	365
1967	535
1968	417
1969	696
1970	917
1971	648
1972	534
1973	674
1974	709
1975	423
1976	763
1977	674
1978	1,165
1979	583
1980	613
1981	622
1982	684
1983	1,235
1984	1,396
1985	1,459
1986	1,062
1987	956
1988	1,266
1989	553
1990	900
1991	957
1992	1,257
1993	720
1994	523
1995	1,093
1996	982
1997	799
1998	1,262
1999	1,087
2000	1,320
2001	1,068
2002	1,169
2003	768
2004	865
2005	708
2006	1,105
2007	1,171
2008	1,210
2009	713
2010	1,147
2011	1,452
2012	699
2013	981
2014	491
2015	637
2016	868
2017	966
2018	723
2019	743
2020	1,352
2021	794
2022	2,096
2023	1,116
2024	1,216
2025	711
2026	760

Download the Data

Data for records on 1977-09-07: 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 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 20	447
20 to 40	56
40 to 60	17
60 to 80	4
80 to 100	1