Weather Records on 15 September 1978

628 weather records were set or tied worldwide on 15 September 1978. Highest significance: Calhoun 2 N, US.

Key Facts for 15 September 1978

On 15 September 1978, 628 weather records were set or tied at long-record stations worldwide.
235 were record highs and 114 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 7 monthly and 620 daily.
Calhoun 2 N set a monthly record daily precipitation of 200.7 mm (7.9 in) on 15 September 1978.
Across 170 earlier years (1797 to 2026) the same calendar date averaged 412 records.

Record Map

628 stations

628 station records on 15 September 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 September 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Calhoun 2 N	United States	Record daily precipitation	200.7 mm (7.9 in)	64 of 100 (Major)
Hart 3 WSW	United States	Record daily precipitation	65.8 mm (2.6 in)	60 of 100 (Major)
Panguitch	United States	Record daily precipitation	36.6 mm (1.4 in)	59 of 100 (Notable)
Baldwin	United States	Record daily precipitation	49.0 mm (1.9 in)	58 of 100 (Notable)
Center	United States	Record daily precipitation	233.7 mm (9.2 in)	49 of 100 (Notable)
Sugozero	Russia	Record daily precipitation	30.2 mm (1.2 in)	47 of 100 (Notable)
Cadillac	United States	Record daily precipitation	43.7 mm (1.7 in)	46 of 100 (Notable)
Mirassol	Brazil	Record daily precipitation	48.3 mm (1.9 in)	44 of 100 (Notable)
Porto Calvo	Brazil	Record daily precipitation	43.4 mm (1.7 in)	44 of 100 (Notable)
Bunbury Post Office	Australia	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
St. Petersburg	Russia	Record daily precipitation	31.8 mm (1.3 in)	43 of 100 (Notable)
Hawthorne AP	United States	Record low maximum temperature	14.4 C (57.9 F)	43 of 100 (Notable)
Henley Park	Australia	Record daily precipitation	27.0 mm (1.1 in)	41 of 100 (Notable)
Barao de Antonina	Brazil	Record daily precipitation	42.5 mm (1.7 in)	41 of 100 (Notable)
Monticello	United States	Record daily precipitation	40.6 mm (1.6 in)	41 of 100 (Notable)
Wooroloo	Australia	Record daily precipitation	36.0 mm (1.4 in)	40 of 100 (Notable)
Hesperia 4 WNW	United States	Record daily precipitation	37.1 mm (1.5 in)	40 of 100 (Notable)
Monroe Rgnl AP	United States	Record daily precipitation	183.6 mm (7.2 in)	40 of 100 (Notable)
Gunlock Ph	United States	Record daily precipitation	30.2 mm (1.2 in)	39 of 100 (Notable)
Salto Do Itarare	Brazil	Record daily precipitation	42.3 mm (1.7 in)	38 of 100 (Notable)
Motozintla (Smn)	Mexico	Record high maximum temperature	34.4 C (93.9 F)	38 of 100 (Notable)
Cartersville	United States	Record daily precipitation	32.0 mm (1.3 in)	38 of 100 (Notable)
Scottville 1 NE	United States	Record daily precipitation	47.8 mm (1.9 in)	38 of 100 (Notable)
Perth Regional Office	Australia	Record daily precipitation	26.4 mm (1.0 in)	37 of 100 (Notable)
Angatuba	Brazil	Record daily precipitation	36.0 mm (1.4 in)	36 of 100 (Notable)
Norwich	United States	Record high maximum temperature	40.0 C (104.0 F)	36 of 100 (Notable)
McGill	United States	Record low maximum temperature	12.2 C (54.0 F)	36 of 100 (Notable)
Taquari-Vai	Brazil	Record daily precipitation	43.3 mm (1.7 in)	35 of 100 (Notable)
Harrison 1 NNW	United States	Record daily precipitation	44.7 mm (1.8 in)	35 of 100 (Notable)
Borinquen AP	Puerto Rico [United States]	Record low minimum temperature	19.4 C (66.9 F)	34 of 100 (Routine)
Tihvin	Russia	Record daily precipitation	25.1 mm (1.0 in)	34 of 100 (Routine)
Stuttgart 9 ESE	United States	Record daily precipitation	87.9 mm (3.5 in)	34 of 100 (Routine)
Coldwater	United States	Record high maximum temperature	38.3 C (100.9 F)	34 of 100 (Routine)
Meade	United States	Record high maximum temperature	39.4 C (102.9 F)	34 of 100 (Routine)
Ness City	United States	Record high maximum temperature	38.3 C (100.9 F)	34 of 100 (Routine)
Major Gercino	Brazil	Record daily precipitation	93.2 mm (3.7 in)	33 of 100 (Routine)
Stuttgart	United States	Record daily precipitation	37.8 mm (1.5 in)	33 of 100 (Routine)
Texarkana Webb Fld	United States	Record high minimum temperature	25.6 C (78.1 F)	33 of 100 (Routine)
Usina Quatiara	Brazil	Record daily precipitation	37.2 mm (1.5 in)	32 of 100 (Routine)
Usina Santa Maria	Brazil	Record daily precipitation	36.1 mm (1.4 in)	32 of 100 (Routine)
Turgaj	Kazakhstan	Record high minimum temperature	15.8 C (60.4 F)	32 of 100 (Routine)
Selemdza	Russia	Record daily precipitation	42.1 mm (1.7 in)	32 of 100 (Routine)
Donaldsonville 4 SW	United States	Record high minimum temperature	24.4 C (75.9 F)	32 of 100 (Routine)
Grenada	United States	Record daily precipitation	32.8 mm (1.3 in)	32 of 100 (Routine)
Castle Dale	United States	Record high minimum temperature	13.9 C (57.0 F)	32 of 100 (Routine)
Shemya USAF Base	United States	Record daily precipitation	27.4 mm (1.1 in)	32 of 100 (Routine)
Brusque (Pcd)	Brazil	Record daily precipitation	62.2 mm (2.4 in)	31 of 100 (Routine)
Aracatuba (Emsa)	Brazil	Record daily precipitation	31.5 mm (1.2 in)	31 of 100 (Routine)
New Iberia AP - Acadiana Rgnl	United States	Record high minimum temperature	25.6 C (78.1 F)	31 of 100 (Routine)
Wungong Dam	Australia	Record daily precipitation	27.0 mm (1.1 in)	30 of 100 (Routine)
Richmond Post Office	Australia	Record low minimum temperature	5.3 C (41.5 F)	30 of 100 (Routine)
Panorama	Brazil	Record daily precipitation	33.8 mm (1.3 in)	30 of 100 (Routine)
Riversul	Brazil	Record daily precipitation	30.4 mm (1.2 in)	30 of 100 (Routine)
Samnanger	Norway	Record daily precipitation	82.6 mm (3.3 in)	30 of 100 (Routine)
Nikolskoye/Beringa Ostrov	Russia	Record low maximum temperature	7.9 C (46.2 F)	30 of 100 (Routine)
Castle Rock	United States	Record high maximum temperature	32.8 C (91.0 F)	30 of 100 (Routine)
Minden	United States	Record low maximum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Cafelandia	Brazil	Record daily precipitation	26.7 mm (1.1 in)	29 of 100 (Routine)
Hugoton	United States	Record high maximum temperature	37.8 C (100.0 F)	29 of 100 (Routine)
Russell	United States	Record daily precipitation	40.9 mm (1.6 in)	29 of 100 (Routine)

Counts by Type and Timescale

628 records

Records set or tied on 15 September 1978 by type: Highest daily maximum 85, Lowest daily maximum 65, Highest daily minimum 150, Lowest daily minimum 49, Heaviest daily rainfall 276, Heaviest daily snowfall 2, Deepest snow cover 1.

Records on 15 September 1978 by type
Record type	Records
Highest daily maximum	85
Lowest daily maximum	65
Highest daily minimum	150
Lowest daily minimum	49
Heaviest daily rainfall	276
Heaviest daily snowfall	2
Deepest snow cover	1

Records on 15 September 1978 by timescale: all-time 1, monthly 7, daily 620.

How Much Records Were Beaten By

481 broken records

Margins by which the 481 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 300.0. Ties are not counted.

Top 20 by Significance

15 September 1978

Top 20 records on 15 September 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 September 1978	Calhoun 2 N, US	monthly rain	200.7 mm (7.9 in)	99.1 mm (3.9 in)	21 years	64 of 100 (Major)
15 September 1978	Hart 3 WSW, US	daily rain	65.8 mm (2.6 in)	44.5 mm (1.8 in)	49 years	60 of 100 (Major)
15 September 1978	Panguitch, US	daily rain	36.6 mm (1.4 in)	21.9 mm (0.9 in)	73 years	59 of 100 (Notable)
15 September 1978	Baldwin, US	daily rain	49.0 mm (1.9 in)	29.9 mm (1.2 in)	76 years	58 of 100 (Notable)
15 September 1978	Center, US	monthly rain	233.7 mm (9.2 in)	68.6 mm (2.7 in)	0 years	49 of 100 (Notable)
15 September 1978	Sugozero, RU	daily rain	30.2 mm (1.2 in)	17.8 mm (0.7 in)	31 years	47 of 100 (Notable)
15 September 1978	Cadillac, US	daily rain	43.7 mm (1.7 in)	32.8 mm (1.3 in)	20 years	46 of 100 (Notable)
15 September 1978	Mirassol, BR	daily rain	48.3 mm (1.9 in)	33.6 mm (1.3 in)	36 years	44 of 100 (Notable)
15 September 1978	Porto Calvo, BR	daily rain	43.4 mm (1.7 in)	22.8 mm (0.9 in)	39 years	44 of 100 (Notable)
15 September 1978	Bunbury Post Office, AU	daily rain	29.0 mm (1.1 in)	9.7 mm (0.38 in)	60 years	43 of 100 (Notable)
15 September 1978	St. Petersburg, RU	daily rain	31.8 mm (1.3 in)	12.0 mm (0.5 in)	31 years	43 of 100 (Notable)
15 September 1978	Hawthorne AP, US	daily low max	14.4 C (57.9 F)	3.9 C (7.0 F)	88 years	43 of 100 (Notable)
15 September 1978	Henley Park, AU	daily rain	27.0 mm (1.1 in)	13.0 mm (0.5 in)	56 years	41 of 100 (Notable)
15 September 1978	Barao de Antonina, BR	daily rain	42.5 mm (1.7 in)	33.7 mm (1.3 in)	24 years	41 of 100 (Notable)
15 September 1978	Monticello, US	daily rain	40.6 mm (1.6 in)	24.3 mm (1.0 in)	64 years	41 of 100 (Notable)
15 September 1978	Wooroloo, AU	daily rain	36.0 mm (1.4 in)	18.2 mm (0.7 in)	35 years	40 of 100 (Notable)
15 September 1978	Hesperia 4 WNW, US	daily rain	37.1 mm (1.5 in)	9.4 mm (0.37 in)	82 years	40 of 100 (Notable)
15 September 1978	Monroe Rgnl AP, US	all-time rain	183.6 mm (7.2 in)	13.9 mm (0.5 in)	28 years	40 of 100 (Notable)
15 September 1978	Gunlock Ph, US	daily rain	30.2 mm (1.2 in)	25.6 mm (1.0 in)	16 years	39 of 100 (Notable)
15 September 1978	Salto Do Itarare, BR	daily rain	42.3 mm (1.7 in)	31.5 mm (1.2 in)	25 years	38 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

1797 to 1978

Records set or tied on this calendar date in each year from 1797 to 1978. 1978 had 628 records.

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

Records on 09-15 in each year
Year	Records
1797	1
1803	1
1806	2
1810	1
1816	1
1818	1
1823	2
1833	1
1836	1
1837	2
1839	1
1841	1
1848	1
1850	1
1851	1
1854	2
1856	1
1857	1
1859	1
1864	1
1865	2
1866	1
1867	2
1868	1
1869	1
1872	1
1873	2
1876	2
1877	2
1880	1
1881	1
1882	6
1884	3
1885	4
1886	2
1887	3
1888	1
1889	5
1890	1
1894	4
1895	1
1897	1
1898	3
1899	3
1900	1
1901	12
1902	7
1903	31
1904	30
1905	16
1906	6
1907	7
1908	16
1909	16
1910	2
1911	40
1912	64
1913	43
1914	18
1915	94
1916	44
1917	50
1918	50
1919	52
1920	164
1921	122
1922	53
1923	193
1924	103
1925	112
1926	134
1927	539
1928	86
1929	99
1930	235
1931	422
1932	295
1933	322
1934	351
1935	463
1936	460
1937	337
1938	247
1939	1,098
1940	181
1941	276
1942	278
1943	360
1944	396
1945	418
1946	411
1947	621
1948	557
1949	523
1950	750
1951	283
1952	455
1953	400
1954	518
1955	532
1956	646
1957	449
1958	294
1959	844
1960	410
1961	586
1962	557
1963	455
1964	839
1965	614
1966	534
1967	578
1968	429
1969	362
1970	1,157
1971	598
1972	356
1973	774
1974	386
1975	739
1976	667
1977	400
1978	628
1979	1,022
1980	563
1981	613
1982	1,315
1983	756
1984	766
1985	764
1986	928
1987	719
1988	818
1989	955
1990	911
1991	1,165
1992	919
1993	2,227
1994	1,363
1995	723
1996	1,212
1997	1,177
1998	1,768
1999	858
2000	1,175
2001	837
2002	1,212
2003	855
2004	893
2005	1,123
2006	1,042
2007	946
2008	1,153
2009	773
2010	913
2011	1,170
2012	568
2013	854
2014	443
2015	997
2016	988
2017	825
2018	874
2019	538
2020	785
2021	467
2022	392
2023	507
2024	681
2025	503
2026	779

Download the Data

Data for records on 1978-09-15: 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 50	476
50 to 100	4
100 to 150	0
150 to 200	0
200 to 250	0
250 to 300	1