Weather Records on 12 September 1977

524 weather records were set or tied worldwide on 12 September 1977. Highest significance: Leavenworth, US.

Key Facts for 12 September 1977

On 12 September 1977, 524 weather records were set or tied at long-record stations worldwide.
121 were record highs and 172 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 13 monthly and 508 daily.
Leavenworth set an all-time record daily precipitation of 177.0 mm (7.0 in) on 12 September 1977.
Across 164 earlier years (1793 to 2026) the same calendar date averaged 413 records.

Record Map

524 stations

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

Weather records on 12 September 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Leavenworth	United States	Record daily precipitation	177.0 mm (7.0 in)	69 of 100 (Major)
Thule	Australia	Record daily precipitation	33.4 mm (1.3 in)	61 of 100 (Major)
Emmett	United States	Record daily precipitation	106.7 mm (4.2 in)	53 of 100 (Notable)
Warrensburg 4NW	United States	Record daily precipitation	104.1 mm (4.1 in)	51 of 100 (Notable)
Narva	Estonia	Record daily precipitation	43.2 mm (1.7 in)	50 of 100 (Notable)
Sweet Springs	United States	Record daily precipitation	96.8 mm (3.8 in)	48 of 100 (Notable)
Clay Ctr 6 ESE	United States	Record daily precipitation	118.1 mm (4.6 in)	46 of 100 (Notable)
Zoseni	Latvia	Record daily precipitation	37.4 mm (1.5 in)	45 of 100 (Notable)
Canistota 2 N	United States	Record daily precipitation	67.8 mm (2.7 in)	45 of 100 (Notable)
Gregory	United States	Record daily precipitation	50.8 mm (2.0 in)	42 of 100 (Notable)
Marion	United States	Record daily precipitation	49.3 mm (1.9 in)	42 of 100 (Notable)
Smithfield	Australia	Record daily precipitation	27.0 mm (1.1 in)	41 of 100 (Notable)
Alexandria	United States	Record daily precipitation	91.4 mm (3.6 in)	40 of 100 (Notable)
Nelson	United States	Record daily precipitation	107.7 mm (4.2 in)	38 of 100 (Notable)
Troicko-Pecherskoe	Russia	Record high minimum temperature	14.2 C (57.6 F)	37 of 100 (Notable)
Stockholm	Sweden	Record low maximum temperature	8.7 C (47.7 F)	37 of 100 (Notable)
Westmoreland	United States	Record daily precipitation	49.5 mm (1.9 in)	37 of 100 (Notable)
Geneva	United States	Record daily precipitation	69.9 mm (2.8 in)	37 of 100 (Notable)
Umea	Sweden	Record low maximum temperature	6.7 C (44.1 F)	36 of 100 (Notable)
Lexington 3E	United States	Record daily precipitation	73.2 mm (2.9 in)	36 of 100 (Notable)
Windsor	United States	Record daily precipitation	70.4 mm (2.8 in)	36 of 100 (Notable)
Chapel Hill 2 W	United States	Record low minimum temperature	7.2 C (45.0 F)	36 of 100 (Notable)
Wewoka 3 SW	United States	Record daily precipitation	75.7 mm (3.0 in)	36 of 100 (Notable)
Faerder Fyr	Norway	Record low minimum temperature	6.0 C (42.8 F)	35 of 100 (Notable)
Ignacio 1 N	United States	Record low maximum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Niobrara	United States	Record daily precipitation	47.0 mm (1.9 in)	35 of 100 (Notable)
Ozernaja	Russia	Record daily precipitation	28.4 mm (1.1 in)	34 of 100 (Routine)
Fairbury 7S	United States	Record daily precipitation	102.9 mm (4.1 in)	34 of 100 (Routine)
Chama	United States	Record high minimum temperature	10.0 C (50.0 F)	33 of 100 (Routine)
Middletown 2 NW	United States	Record low minimum temperature	5.0 C (41.0 F)	33 of 100 (Routine)
Krasnaja Poljana	Russia	Record daily precipitation	68.7 mm (2.7 in)	32 of 100 (Routine)
Olathe 3E	United States	Record daily precipitation	61.0 mm (2.4 in)	32 of 100 (Routine)
Buffalo 2N	United States	Record daily precipitation	58.4 mm (2.3 in)	32 of 100 (Routine)
Bernalillo	United States	Record low maximum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Cherdyn'	Russia	Record high minimum temperature	15.0 C (59.0 F)	31 of 100 (Routine)
Sugarloaf Rsvr	United States	Record low maximum temperature	9.4 C (48.9 F)	31 of 100 (Routine)
Fruitland	United States	Record low maximum temperature	22.8 C (73.0 F)	31 of 100 (Routine)
Ft Duchesne	United States	Record low maximum temperature	12.2 C (54.0 F)	31 of 100 (Routine)
Mistassini Post	Canada	Record low minimum temperature	-2.8 C (27.0 F)	30 of 100 (Routine)
Mormon Flat	United States	Record low maximum temperature	27.2 C (81.0 F)	30 of 100 (Routine)
Crescent City 3 NNW	United States	Record low maximum temperature	13.3 C (55.9 F)	30 of 100 (Routine)
Beatrice	United States	Record daily precipitation	57.4 mm (2.3 in)	30 of 100 (Routine)
Bristow	United States	Record daily precipitation	83.8 mm (3.3 in)	30 of 100 (Routine)
Oksoey Fyr	Norway	Record low minimum temperature	6.1 C (43.0 F)	29 of 100 (Routine)
Hawarden	United States	Record daily precipitation	41.1 mm (1.6 in)	29 of 100 (Routine)
Gustavus	United States	Record daily precipitation	38.6 mm (1.5 in)	29 of 100 (Routine)
La Estanzuela (Eele)	Uruguay	Record daily precipitation	63.0 mm (2.5 in)	29 of 100 (Routine)
Wandering Comparison	Australia	Record low minimum temperature	-2.2 C (28.0 F)	28 of 100 (Routine)
Horton	United States	Record daily precipitation	127.3 mm (5.0 in)	28 of 100 (Routine)
Carrollton	United States	Record daily precipitation	56.9 mm (2.2 in)	28 of 100 (Routine)
Suchiate	Mexico	Record low minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Tonala (Smn)	Mexico	Record high minimum temperature	25.0 C (77.0 F)	27 of 100 (Routine)
Atoyac (Smn)	Mexico	Record low minimum temperature	20.6 C (69.1 F)	27 of 100 (Routine)
W Chester 2 NW	United States	Record low minimum temperature	4.4 C (39.9 F)	27 of 100 (Routine)
Ainsworth	United States	Record daily precipitation	36.3 mm (1.4 in)	26 of 100 (Routine)
Phoenixville 1 E	United States	Record low minimum temperature	1.7 C (35.1 F)	26 of 100 (Routine)
Cabbage Tree Creek	Australia	Record daily precipitation	82.4 mm (3.2 in)	25 of 100 (Routine)
Ulvhall	Sweden	Record low minimum temperature	-2.8 C (27.0 F)	25 of 100 (Routine)
Bonner Springs	United States	Record daily precipitation	119.4 mm (4.7 in)	25 of 100 (Routine)
Holton	United States	Record daily precipitation	104.1 mm (4.1 in)	25 of 100 (Routine)

Counts by Type and Timescale

524 records

Records set or tied on 12 September 1977 by type: Highest daily maximum 41, Lowest daily maximum 79, Highest daily minimum 80, Lowest daily minimum 93, Heaviest daily rainfall 227, Deepest snow cover 4.

Records on 12 September 1977 by type
Record type	Records
Highest daily maximum	41
Lowest daily maximum	79
Highest daily minimum	80
Lowest daily minimum	93
Heaviest daily rainfall	227
Heaviest daily snowfall	0
Deepest snow cover	4

Records on 12 September 1977 by timescale: all-time 3, monthly 13, daily 508.

How Much Records Were Beaten By

418 broken records

Margins by which the 418 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

12 September 1977

Top 20 records on 12 September 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 September 1977	Leavenworth, US	all-time rain	177.0 mm (7.0 in)	54.3 mm (2.1 in)	31 years	69 of 100 (Major)
12 September 1977	Thule, AU	daily rain	33.4 mm (1.3 in)	22.5 mm (0.9 in)	76 years	61 of 100 (Major)
12 September 1977	Emmett, US	daily rain	106.7 mm (4.2 in)	53.1 mm (2.1 in)	51 years	53 of 100 (Notable)
12 September 1977	Warrensburg 4NW, US	daily rain	104.1 mm (4.1 in)	65.7 mm (2.6 in)	28 years	51 of 100 (Notable)
12 September 1977	Narva, EE	daily rain	43.2 mm (1.7 in)	16.1 mm (0.6 in)	46 years	50 of 100 (Notable)
12 September 1977	Sweet Springs, US	daily rain	96.8 mm (3.8 in)	67.6 mm (2.7 in)	32 years	48 of 100 (Notable)
12 September 1977	Clay Ctr 6 ESE, US	all-time rain	118.1 mm (4.6 in)	4.6 mm (0.18 in)	57 years	46 of 100 (Notable)
12 September 1977	Zoseni, LV	daily rain	37.4 mm (1.5 in)	22.5 mm (0.9 in)	7 years	45 of 100 (Notable)
12 September 1977	Canistota 2 N, US	daily rain	67.8 mm (2.7 in)	35.5 mm (1.4 in)	48 years	45 of 100 (Notable)
12 September 1977	Gregory, US	daily rain	50.8 mm (2.0 in)	29.0 mm (1.1 in)	26 years	42 of 100 (Notable)
12 September 1977	Marion, US	daily rain	49.3 mm (1.9 in)	20.1 mm (0.8 in)	71 years	42 of 100 (Notable)
12 September 1977	Smithfield, AU	daily rain	27.0 mm (1.1 in)	7.9 mm (0.31 in)	60 years	41 of 100 (Notable)
12 September 1977	Alexandria, US	monthly rain	91.4 mm (3.6 in)	12.7 mm (0.5 in)	42 years	40 of 100 (Notable)
12 September 1977	Nelson, US	daily rain	107.7 mm (4.2 in)	44.2 mm (1.7 in)	16 years	38 of 100 (Notable)
12 September 1977	Troicko-Pecherskoe, RU	monthly high min	14.2 C (57.6 F)	0.4 C (0.7 F)	62 years	37 of 100 (Notable)
12 September 1977	Stockholm, SE	daily low max	8.7 C (47.7 F)	0.8 C (1.4 F)	87 years	37 of 100 (Notable)
12 September 1977	Westmoreland, US	daily rain	49.5 mm (1.9 in)	34.8 mm (1.4 in)	32 years	37 of 100 (Notable)
12 September 1977	Geneva, US	daily rain	69.9 mm (2.8 in)	34.8 mm (1.4 in)	26 years	37 of 100 (Notable)
12 September 1977	Umea, SE	daily low max	6.7 C (44.1 F)	0.8 C (1.4 F)	83 years	36 of 100 (Notable)
12 September 1977	Lexington 3E, US	daily rain	73.2 mm (2.9 in)	8.9 mm (0.35 in)	78 years	36 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 524 records.

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

Records on 09-12 in each year
Year	Records
1793	2
1809	1
1813	1
1814	2
1834	1
1837	2
1839	1
1847	1
1848	1
1854	4
1859	2
1860	2
1865	2
1866	1
1867	1
1868	2
1869	1
1872	2
1876	1
1878	1
1880	1
1881	1
1882	1
1884	2
1885	2
1886	1
1887	2
1888	2
1889	1
1891	4
1892	1
1893	4
1894	1
1895	5
1896	2
1897	3
1898	3
1899	4
1900	1
1901	5
1902	11
1903	18
1904	7
1905	8
1906	24
1907	11
1908	12
1909	11
1910	4
1911	15
1912	20
1913	12
1914	49
1915	71
1916	21
1917	231
1918	42
1919	69
1920	49
1921	60
1922	136
1923	33
1924	177
1925	443
1926	89
1927	339
1928	155
1929	118
1930	198
1931	648
1932	199
1933	360
1934	176
1935	441
1936	515
1937	318
1938	332
1939	702
1940	891
1941	172
1942	337
1943	544
1944	393
1945	414
1946	302
1947	596
1948	292
1949	512
1950	578
1951	399
1952	575
1953	515
1954	313
1955	457
1956	389
1957	727
1958	783
1959	536
1960	772
1961	750
1962	407
1963	466
1964	836
1965	459
1966	416
1967	510
1968	428
1969	558
1970	619
1971	593
1972	430
1973	588
1974	575
1975	1,102
1976	539
1977	524
1978	952
1979	765
1980	511
1981	424
1982	993
1983	915
1984	700
1985	876
1986	787
1987	686
1988	997
1989	1,313
1990	1,001
1991	672
1992	767
1993	798
1994	550
1995	532
1996	1,014
1997	737
1998	1,770
1999	938
2000	1,188
2001	797
2002	883
2003	830
2004	653
2005	1,032
2006	963
2007	776
2008	1,213
2009	876
2010	939
2011	988
2012	639
2013	1,066
2014	1,374
2015	704
2016	748
2017	1,114
2018	595
2019	884
2020	566
2021	513
2022	739
2023	844
2024	1,009
2025	433
2026	627

Download the Data

Data for records on 1977-09-12: 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	354
10 to 20	35
20 to 30	10
30 to 40	10
40 to 50	3
50 to 60	4
60 to 70	2