Weather Records on 11 September 1978

911 weather records were set or tied worldwide on 11 September 1978. Highest significance: Opheim 12 SSE, US.

Key Facts for 11 September 1978

On 11 September 1978, 911 weather records were set or tied at long-record stations worldwide.
326 were record highs and 163 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 17 monthly and 893 daily.
Opheim 12 SSE set an all-time record daily precipitation of 86.6 mm (3.4 in) on 11 September 1978.
Across 164 earlier years (1809 to 2026) the same calendar date averaged 421 records.

Record Map

911 stations

911 station records on 11 September 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 September 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Opheim 12 SSE	United States	Record daily precipitation	86.6 mm (3.4 in)	72 of 100 (Major)
Maple Creek	Canada	Record daily precipitation	49.3 mm (1.9 in)	68 of 100 (Major)
Tonti (Bos)	South Africa	Record daily precipitation	120.0 mm (4.7 in)	64 of 100 (Major)
Medicine Hat A	Canada	Record daily precipitation	61.1 mm (2.4 in)	63 of 100 (Major)
Klintonel	Canada	Record daily precipitation	58.4 mm (2.3 in)	63 of 100 (Major)
Shaunavon	Canada	Record daily precipitation	43.2 mm (1.7 in)	63 of 100 (Major)
Fairfield	United States	Record daily precipitation	52.8 mm (2.1 in)	59 of 100 (Notable)
Cut Bank AP	United States	Record daily precipitation	34.0 mm (1.3 in)	59 of 100 (Notable)
High River	Canada	Record daily precipitation	34.8 mm (1.4 in)	57 of 100 (Notable)
Mountain View	Canada	Record daily precipitation	58.9 mm (2.3 in)	56 of 100 (Notable)
Ishpeming	United States	Record daily precipitation	104.4 mm (4.1 in)	56 of 100 (Notable)
Beaver Mines	Canada	Record daily precipitation	48.3 mm (1.9 in)	54 of 100 (Notable)
Meadville 1 S	United States	Record daily precipitation	56.4 mm (2.2 in)	54 of 100 (Notable)
Worcester	South Africa	Record daily precipitation	30.0 mm (1.2 in)	53 of 100 (Notable)
Flagstaff (Tnk)	South Africa	Record daily precipitation	80.0 mm (3.1 in)	53 of 100 (Notable)
Shelby 2 NW	United States	Record daily precipitation	50.3 mm (2.0 in)	53 of 100 (Notable)
Glasgow	United States	Record daily precipitation	41.4 mm (1.6 in)	53 of 100 (Notable)
Red Deer A	Canada	Record daily precipitation	42.2 mm (1.7 in)	52 of 100 (Notable)
Lethbridge Cda	Canada	Record daily precipitation	45.5 mm (1.8 in)	50 of 100 (Notable)
Pekisko	Canada	Record daily precipitation	47.2 mm (1.9 in)	50 of 100 (Notable)
Beaver Is	United States	Record daily precipitation	41.9 mm (1.6 in)	50 of 100 (Notable)
Toccoa	United States	Record daily precipitation	81.3 mm (3.2 in)	49 of 100 (Notable)
Brooks Ahrc	Canada	Record daily precipitation	38.4 mm (1.5 in)	48 of 100 (Notable)
Gleichen	Canada	Record daily precipitation	27.2 mm (1.1 in)	48 of 100 (Notable)
Gravelbourg	Canada	Record daily precipitation	56.1 mm (2.2 in)	48 of 100 (Notable)
Grand Forks Intl AP	United States	Record daily precipitation	59.7 mm (2.4 in)	47 of 100 (Notable)
Harvey Post Office	Australia	Record daily precipitation	43.4 mm (1.7 in)	46 of 100 (Notable)
Foremost	Canada	Record daily precipitation	61.5 mm (2.4 in)	46 of 100 (Notable)
Lethbridge A	Canada	Record daily precipitation	32.2 mm (1.3 in)	46 of 100 (Notable)
Weismain	Germany	Record daily precipitation	43.9 mm (1.7 in)	46 of 100 (Notable)
Cornelia	United States	Record daily precipitation	90.4 mm (3.6 in)	46 of 100 (Notable)
Lame Deer	United States	Record daily precipitation	30.5 mm (1.2 in)	46 of 100 (Notable)
New Salem 5NW	United States	Record daily precipitation	33.5 mm (1.3 in)	46 of 100 (Notable)
Poronajsk	Russia	Record daily precipitation	92.6 mm (3.6 in)	44 of 100 (Notable)
Kanevskaja	Russia	Record daily precipitation	31.5 mm (1.2 in)	44 of 100 (Notable)
Steuben	United States	Record daily precipitation	48.3 mm (1.9 in)	44 of 100 (Notable)
Center 4SE	United States	Record daily precipitation	37.8 mm (1.5 in)	44 of 100 (Notable)
Turner	United States	Record daily precipitation	26.7 mm (1.1 in)	43 of 100 (Notable)
Pierson	Canada	Record daily precipitation	30.7 mm (1.2 in)	42 of 100 (Notable)
Bismarck	United States	Record daily precipitation	34.5 mm (1.4 in)	42 of 100 (Notable)
Margaret River	Australia	Record daily precipitation	37.2 mm (1.5 in)	41 of 100 (Notable)
Port Hope	Canada	Record daily precipitation	45.6 mm (1.8 in)	41 of 100 (Notable)
Old Forge	United States	Record daily precipitation	66.3 mm (2.6 in)	41 of 100 (Notable)
Aneroid	Canada	Record daily precipitation	52.4 mm (2.1 in)	40 of 100 (Notable)
Munising	United States	Record daily precipitation	59.4 mm (2.3 in)	40 of 100 (Notable)
Mott	United States	Record daily precipitation	31.5 mm (1.2 in)	40 of 100 (Notable)
Minot Intl AP	United States	Record daily precipitation	41.9 mm (1.6 in)	40 of 100 (Notable)
Empress	Canada	Record daily precipitation	34.4 mm (1.4 in)	39 of 100 (Notable)
Val-Marie	Canada	Record daily precipitation	36.6 mm (1.4 in)	39 of 100 (Notable)
Chapala	Mexico	Record low minimum temperature	10.0 C (50.0 F)	39 of 100 (Notable)
Sidney	United States	Record daily precipitation	27.2 mm (1.1 in)	39 of 100 (Notable)
Westby	United States	Record daily precipitation	26.7 mm (1.1 in)	39 of 100 (Notable)
Caldwell	Canada	Record daily precipitation	45.7 mm (1.8 in)	38 of 100 (Notable)
Kananaskis	Canada	Record daily precipitation	34.0 mm (1.3 in)	38 of 100 (Notable)
Caron	Canada	Record daily precipitation	31.8 mm (1.3 in)	38 of 100 (Notable)
Divnoe	Russia	Record daily precipitation	27.7 mm (1.1 in)	38 of 100 (Notable)
Silver Lake Brighton	United States	Record snow depth	15.2 cm (6.0 in)	38 of 100 (Notable)
Heart Mtn	United States	Record daily precipitation	25.1 mm (1.0 in)	38 of 100 (Notable)
Lewistown AP	United States	Record daily precipitation	36.3 mm (1.4 in)	38 of 100 (Notable)
Illalangi	Australia	Record daily precipitation	39.0 mm (1.5 in)	37 of 100 (Notable)

Counts by Type and Timescale

911 records

Records set or tied on 11 September 1978 by type: Highest daily maximum 106, Lowest daily maximum 123, Highest daily minimum 220, Lowest daily minimum 40, Heaviest daily rainfall 415, Heaviest daily snowfall 4, Deepest snow cover 3.

Records on 11 September 1978 by type
Record type	Records
Highest daily maximum	106
Lowest daily maximum	123
Highest daily minimum	220
Lowest daily minimum	40
Heaviest daily rainfall	415
Heaviest daily snowfall	4
Deepest snow cover	3

Records on 11 September 1978 by timescale: all-time 1, monthly 17, daily 893.

How Much Records Were Beaten By

754 broken records

Margins by which the 754 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 152.0. Ties are not counted.

Top 20 by Significance

11 September 1978

Top 20 records on 11 September 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 September 1978	Opheim 12 SSE, US	all-time rain	86.6 mm (3.4 in)	24.1 mm (0.9 in)	32 years	72 of 100 (Major)
11 September 1978	Maple Creek, CA	daily rain	49.3 mm (1.9 in)	23.1 mm (0.9 in)	87 years	68 of 100 (Major)
11 September 1978	Tonti (Bos), ZA	daily rain	120.0 mm (4.7 in)	102.2 mm (4.0 in)	63 years	64 of 100 (Major)
11 September 1978	Medicine Hat A, CA	daily rain	61.1 mm (2.4 in)	44.1 mm (1.7 in)	48 years	63 of 100 (Major)
11 September 1978	Klintonel, CA	daily rain	58.4 mm (2.3 in)	48.2 mm (1.9 in)	56 years	63 of 100 (Major)
11 September 1978	Shaunavon, CA	daily rain	43.2 mm (1.7 in)	33.8 mm (1.3 in)	56 years	63 of 100 (Major)
11 September 1978	Fairfield, US	daily rain	52.8 mm (2.1 in)	44.7 mm (1.8 in)	47 years	59 of 100 (Notable)
11 September 1978	Cut Bank AP, US	daily rain	34.0 mm (1.3 in)	23.8 mm (0.9 in)	52 years	59 of 100 (Notable)
11 September 1978	High River, CA	daily rain	34.8 mm (1.4 in)	23.9 mm (0.9 in)	71 years	57 of 100 (Notable)
11 September 1978	Mountain View, CA	daily rain	58.9 mm (2.3 in)	31.5 mm (1.2 in)	63 years	56 of 100 (Notable)
11 September 1978	Ishpeming, US	monthly rain	104.4 mm (4.1 in)	21.6 mm (0.9 in)	56 years	56 of 100 (Notable)
11 September 1978	Beaver Mines, CA	daily rain	48.3 mm (1.9 in)	34.6 mm (1.4 in)	27 years	54 of 100 (Notable)
11 September 1978	Meadville 1 S, US	daily rain	56.4 mm (2.2 in)	37.3 mm (1.5 in)	32 years	54 of 100 (Notable)
11 September 1978	Worcester, ZA	daily rain	30.0 mm (1.2 in)	13.0 mm (0.5 in)	90 years	53 of 100 (Notable)
11 September 1978	Flagstaff (Tnk), ZA	daily rain	80.0 mm (3.1 in)	63.0 mm (2.5 in)	20 years	53 of 100 (Notable)
11 September 1978	Shelby 2 NW, US	daily rain	50.3 mm (2.0 in)	37.6 mm (1.5 in)	84 years	53 of 100 (Notable)
11 September 1978	Glasgow, US	monthly rain	41.4 mm (1.6 in)	16.5 mm (0.6 in)	17 years	53 of 100 (Notable)
11 September 1978	Red Deer A, CA	daily rain	42.2 mm (1.7 in)	20.9 mm (0.8 in)	39 years	52 of 100 (Notable)
11 September 1978	Lethbridge Cda, CA	daily rain	45.5 mm (1.8 in)	30.3 mm (1.2 in)	11 years	50 of 100 (Notable)
11 September 1978	Pekisko, CA	daily rain	47.2 mm (1.9 in)	33.0 mm (1.3 in)	15 years	50 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

1809 to 1978

Records set or tied on this calendar date in each year from 1809 to 1978. 1978 had 911 records.

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

Records on 09-11 in each year
Year	Records
1809	1
1814	3
1818	1
1830	1
1836	1
1838	3
1839	1
1848	1
1850	1
1851	1
1854	2
1858	1
1860	2
1861	1
1863	2
1865	3
1866	1
1874	2
1876	1
1877	1
1879	1
1880	1
1882	4
1883	2
1884	1
1886	1
1888	2
1889	4
1890	2
1891	2
1892	1
1893	4
1894	2
1895	4
1896	1
1897	3
1898	3
1899	5
1900	1
1901	3
1902	15
1903	13
1904	4
1905	5
1906	10
1907	9
1908	20
1909	12
1910	19
1911	9
1912	25
1913	22
1914	52
1915	160
1916	17
1917	88
1918	62
1919	52
1920	158
1921	52
1922	78
1923	44
1924	290
1925	260
1926	137
1927	300
1928	127
1929	206
1930	136
1931	868
1932	210
1933	276
1934	144
1935	410
1936	567
1937	324
1938	288
1939	561
1940	891
1941	210
1942	234
1943	335
1944	446
1945	341
1946	262
1947	611
1948	424
1949	450
1950	462
1951	247
1952	549
1953	392
1954	363
1955	479
1956	539
1957	470
1958	748
1959	488
1960	423
1961	524
1962	480
1963	359
1964	1,195
1965	414
1966	392
1967	478
1968	835
1969	685
1970	474
1971	464
1972	507
1973	612
1974	430
1975	644
1976	920
1977	406
1978	911
1979	596
1980	474
1981	347
1982	862
1983	1,243
1984	888
1985	844
1986	1,221
1987	595
1988	1,019
1989	1,301
1990	840
1991	843
1992	672
1993	809
1994	713
1995	619
1996	1,030
1997	808
1998	1,821
1999	1,073
2000	1,469
2001	826
2002	1,059
2003	1,022
2004	740
2005	1,163
2006	1,132
2007	947
2008	916
2009	774
2010	965
2011	1,051
2012	687
2013	1,207
2014	1,100
2015	683
2016	677
2017	916
2018	763
2019	806
2020	1,235
2021	851
2022	617
2023	1,034
2024	889
2025	917
2026	615

Download the Data

Data for records on 1978-09-11: 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	698
20 to 40	43
40 to 60	9
60 to 80	1
80 to 100	0
100 to 120	2
120 to 140	0
140 to 160	1