Weather Records on 15 September 1966

534 weather records were set or tied worldwide on 15 September 1966. Highest significance: Westminster 2 SSE, US.

Key Facts for 15 September 1966

On 15 September 1966, 534 weather records were set or tied at long-record stations worldwide.
58 were record highs and 213 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 6 monthly and 527 daily.
Westminster 2 SSE set a daily record precipitation of 101.1 mm (4.0 in) on 15 September 1966.
Across 170 earlier years (1797 to 2026) the same calendar date averaged 412 records.

Record Map

534 stations

534 station records on 15 September 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 September 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Westminster 2 SSE	United States	Record daily precipitation	101.1 mm (4.0 in)	66 of 100 (Major)
Harpers Ferry River	United States	Record daily precipitation	108.0 mm (4.3 in)	65 of 100 (Major)
Tohatchi 1 ESE	United States	Record daily precipitation	36.8 mm (1.4 in)	57 of 100 (Notable)
Coatesville 1 SW	United States	Record daily precipitation	89.7 mm (3.5 in)	52 of 100 (Notable)
Fredericksburg Np	United States	Record daily precipitation	76.7 mm (3.0 in)	52 of 100 (Notable)
Arendtsville	United States	Record daily precipitation	106.7 mm (4.2 in)	48 of 100 (Notable)
Riverton	United States	Record daily precipitation	59.9 mm (2.4 in)	46 of 100 (Notable)
Lamar Rs	United States	Record daily precipitation	36.8 mm (1.4 in)	44 of 100 (Notable)
Crossroads 2	United States	Record daily precipitation	54.6 mm (2.1 in)	43 of 100 (Notable)
New Bedford Coop	United States	Record daily precipitation	56.9 mm (2.2 in)	42 of 100 (Notable)
Hebgen Dam	United States	Record daily precipitation	54.6 mm (2.1 in)	42 of 100 (Notable)
Canyon	United States	Record daily precipitation	77.7 mm (3.1 in)	41 of 100 (Notable)
Tallandoon Post Office	Australia	Record daily precipitation	51.3 mm (2.0 in)	40 of 100 (Notable)
Crandall Creek	United States	Record daily precipitation	34.3 mm (1.4 in)	40 of 100 (Notable)
Elamang	Australia	Record daily precipitation	39.6 mm (1.6 in)	39 of 100 (Notable)
Bloukrans (Bos)	South Africa	Record daily precipitation	50.0 mm (2.0 in)	39 of 100 (Notable)
Hammonton 1 NE	United States	Record daily precipitation	67.3 mm (2.6 in)	39 of 100 (Notable)
Ormley	Australia	Record daily precipitation	25.9 mm (1.0 in)	38 of 100 (Notable)
Holbrook	United States	Record low minimum temperature	-0.6 C (30.9 F)	38 of 100 (Notable)
Hanover	United States	Record daily precipitation	82.6 mm (3.3 in)	38 of 100 (Notable)
Memphis	United States	Record daily precipitation	69.9 mm (2.8 in)	38 of 100 (Notable)
Winchester 7 SE	United States	Record daily precipitation	72.1 mm (2.8 in)	38 of 100 (Notable)
Girard State Forest	Australia	Record daily precipitation	41.9 mm (1.6 in)	37 of 100 (Notable)
Hico	United States	Record daily precipitation	58.7 mm (2.3 in)	37 of 100 (Notable)
Virginia City	United States	Record daily precipitation	28.4 mm (1.1 in)	36 of 100 (Notable)
Princess Anne	United States	Record daily precipitation	39.9 mm (1.6 in)	35 of 100 (Notable)
Pemberton	United States	Record daily precipitation	71.9 mm (2.8 in)	35 of 100 (Notable)
San Jon	United States	Record daily precipitation	46.7 mm (1.8 in)	35 of 100 (Notable)
Spring Grove	United States	Record daily precipitation	65.0 mm (2.6 in)	35 of 100 (Notable)
York Haven	United States	Record daily precipitation	58.9 mm (2.3 in)	35 of 100 (Notable)
Plainview	United States	Record daily precipitation	28.4 mm (1.1 in)	35 of 100 (Notable)
Witelsbos (Bos)	South Africa	Record daily precipitation	60.4 mm (2.4 in)	34 of 100 (Routine)
Clifton	United States	Record daily precipitation	50.8 mm (2.0 in)	34 of 100 (Routine)
Guntersville	United States	Record daily precipitation	32.8 mm (1.3 in)	33 of 100 (Routine)
Laurel 3 W	United States	Record daily precipitation	107.7 mm (4.2 in)	33 of 100 (Routine)
Freehold-Marlboro	United States	Record daily precipitation	50.0 mm (2.0 in)	33 of 100 (Routine)
Quanah 2 SW	United States	Record daily precipitation	38.4 mm (1.5 in)	33 of 100 (Routine)
Rantoul	United States	Record daily precipitation	39.4 mm (1.6 in)	33 of 100 (Routine)
Dubois Exp STN	United States	Record daily precipitation	28.4 mm (1.1 in)	32 of 100 (Routine)
Cumberland	United States	Record low maximum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
George School	United States	Record daily precipitation	69.3 mm (2.7 in)	32 of 100 (Routine)
Bethanga Lower	Australia	Record daily precipitation	36.3 mm (1.4 in)	31 of 100 (Routine)
Kinglake	Australia	Record daily precipitation	27.9 mm (1.1 in)	31 of 100 (Routine)
Storrs	United States	Record daily precipitation	25.4 mm (1.0 in)	31 of 100 (Routine)
American Falls 6 NE	United States	Record low maximum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Syracuse 1NE	United States	Record low maximum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Livingston	United States	Record daily precipitation	27.2 mm (1.1 in)	31 of 100 (Routine)
Norris Madison Pwr House	United States	Record daily precipitation	31.8 mm (1.3 in)	31 of 100 (Routine)
Long Branch-Oakhurst	United States	Record daily precipitation	65.0 mm (2.6 in)	31 of 100 (Routine)
West Grove 1 SE	United States	Record daily precipitation	78.7 mm (3.1 in)	31 of 100 (Routine)
Natashquan A	Canada	Record daily precipitation	37.6 mm (1.5 in)	30 of 100 (Routine)
Douglas Smelter	United States	Record low maximum temperature	23.9 C (75.0 F)	30 of 100 (Routine)
Beaver Dam	United States	Record daily precipitation	31.0 mm (1.2 in)	30 of 100 (Routine)
Greenville 2 W	United States	Record daily precipitation	33.5 mm (1.3 in)	30 of 100 (Routine)
Hyannis	United States	Record daily precipitation	53.3 mm (2.1 in)	30 of 100 (Routine)
Hightstown 2 W	United States	Record daily precipitation	34.5 mm (1.4 in)	30 of 100 (Routine)
Conshohocken	United States	Record daily precipitation	81.3 mm (3.2 in)	30 of 100 (Routine)
Newport River	United States	Record daily precipitation	61.2 mm (2.4 in)	30 of 100 (Routine)
Purcellville	United States	Record daily precipitation	46.7 mm (1.8 in)	30 of 100 (Routine)
Portage Wwtp	United States	Record low minimum temperature	-0.6 C (30.9 F)	30 of 100 (Routine)

Counts by Type and Timescale

534 records

Records set or tied on 15 September 1966 by type: Highest daily maximum 21, Lowest daily maximum 144, Highest daily minimum 37, Lowest daily minimum 69, Heaviest daily rainfall 259, Heaviest daily snowfall 3, Deepest snow cover 1.

Records on 15 September 1966 by type
Record type	Records
Highest daily maximum	21
Lowest daily maximum	144
Highest daily minimum	37
Lowest daily minimum	69
Heaviest daily rainfall	259
Heaviest daily snowfall	3
Deepest snow cover	1

Records on 15 September 1966 by timescale: all-time 1, monthly 6, daily 527.

How Much Records Were Beaten By

453 broken records

Margins by which the 453 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 82.8. Ties are not counted.

Top 20 by Significance

15 September 1966

Top 20 records on 15 September 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 September 1966	Westminster 2 SSE, US	daily rain	101.1 mm (4.0 in)	72.4 mm (2.9 in)	65 years	66 of 100 (Major)
15 September 1966	Harpers Ferry River, US	daily rain	108.0 mm (4.3 in)	73.5 mm (2.9 in)	61 years	65 of 100 (Major)
15 September 1966	Tohatchi 1 ESE, US	daily rain	36.8 mm (1.4 in)	26.6 mm (1.0 in)	43 years	57 of 100 (Notable)
15 September 1966	Coatesville 1 SW, US	daily rain	89.7 mm (3.5 in)	42.7 mm (1.7 in)	61 years	52 of 100 (Notable)
15 September 1966	Fredericksburg Np, US	daily rain	76.7 mm (3.0 in)	42.7 mm (1.7 in)	61 years	52 of 100 (Notable)
15 September 1966	Arendtsville, US	daily rain	106.7 mm (4.2 in)	82.8 mm (3.3 in)	15 years	48 of 100 (Notable)
15 September 1966	Riverton, US	daily rain	59.9 mm (2.4 in)	28.7 mm (1.1 in)	61 years	46 of 100 (Notable)
15 September 1966	Lamar Rs, US	monthly rain	36.8 mm (1.4 in)	8.9 mm (0.35 in)	42 years	44 of 100 (Notable)
15 September 1966	Crossroads 2, US	daily rain	54.6 mm (2.1 in)	41.9 mm (1.6 in)	27 years	43 of 100 (Notable)
15 September 1966	New Bedford Coop, US	daily rain	56.9 mm (2.2 in)	26.9 mm (1.1 in)	61 years	42 of 100 (Notable)
15 September 1966	Hebgen Dam, US	all-time rain	54.6 mm (2.1 in)	6.3 mm (0.25 in)	20 years	42 of 100 (Notable)
15 September 1966	Canyon, US	daily rain	77.7 mm (3.1 in)	33.2 mm (1.3 in)	43 years	41 of 100 (Notable)
15 September 1966	Tallandoon Post Office, AU	daily rain	51.3 mm (2.0 in)	18.3 mm (0.7 in)	53 years	40 of 100 (Notable)
15 September 1966	Crandall Creek, US	daily rain	34.3 mm (1.4 in)	22.1 mm (0.9 in)	8 years	40 of 100 (Notable)
15 September 1966	Elamang, AU	daily rain	39.6 mm (1.6 in)	22.6 mm (0.9 in)	4 years	39 of 100 (Notable)
15 September 1966	Bloukrans (Bos), ZA	daily rain	50.0 mm (2.0 in)	13.2 mm (0.5 in)	81 years	39 of 100 (Notable)
15 September 1966	Hammonton 1 NE, US	daily rain	67.3 mm (2.6 in)	47.0 mm (1.9 in)	21 years	39 of 100 (Notable)
15 September 1966	Ormley, AU	daily rain	25.9 mm (1.0 in)	13.7 mm (0.5 in)	31 years	38 of 100 (Notable)
15 September 1966	Holbrook, US	daily low min	-0.6 C (30.9 F)	3.9 C (7.0 F)	71 years	38 of 100 (Notable)
15 September 1966	Hanover, US	daily rain	82.6 mm (3.3 in)	25.4 mm (1.0 in)	49 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 1966

Records set or tied on this calendar date in each year from 1797 to 1966. 1966 had 534 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 1966-09-15: 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 20	412
20 to 40	30
40 to 60	7
60 to 80	3
80 to 100	1