Weather Records on 20 September 1966

414 weather records were set or tied worldwide on 20 September 1966. Highest significance: Monroe 2 SE, US.

Key Facts for 20 September 1966

On 20 September 1966, 414 weather records were set or tied at long-record stations worldwide.
99 were record highs and 72 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 409 daily.
Monroe 2 SE set a daily record precipitation of 143.0 mm (5.6 in) on 20 September 1966.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 442 records.

Record Map

414 stations

414 station records on 20 September 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Monroe 2 SE	United States	Record daily precipitation	143.0 mm (5.6 in)	53 of 100 (Notable)
Marysville	United States	Record daily precipitation	61.0 mm (2.4 in)	48 of 100 (Notable)
W Manchester 3 WSW	United States	Record daily precipitation	50.5 mm (2.0 in)	48 of 100 (Notable)
Maxwell 3 NW	United States	Record daily precipitation	38.1 mm (1.5 in)	46 of 100 (Notable)
Catawba	United States	Record daily precipitation	78.0 mm (3.1 in)	46 of 100 (Notable)
Charlottesville 2W	United States	Record daily precipitation	78.5 mm (3.1 in)	46 of 100 (Notable)
Kodanand	India	Record daily precipitation	83.1 mm (3.3 in)	45 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	64.8 mm (2.6 in)	45 of 100 (Notable)
Columbia 2SSE	United States	Record daily precipitation	68.6 mm (2.7 in)	45 of 100 (Notable)
Hambantota	Sri Lanka	Record high minimum temperature	26.3 C (79.3 F)	44 of 100 (Notable)
Bowling Green 1 E	United States	Record daily precipitation	78.7 mm (3.1 in)	44 of 100 (Notable)
Udumalpet	India	Record daily precipitation	76.6 mm (3.0 in)	43 of 100 (Notable)
Southport 5 N	United States	Record daily precipitation	101.6 mm (4.0 in)	43 of 100 (Notable)
Culpeper	United States	Record daily precipitation	68.6 mm (2.7 in)	42 of 100 (Notable)
Sidney 2 N	United States	Record daily precipitation	40.9 mm (1.6 in)	40 of 100 (Notable)
Danville 2 SE	United States	Record daily precipitation	65.5 mm (2.6 in)	40 of 100 (Notable)
Louisa	United States	Record daily precipitation	62.7 mm (2.5 in)	39 of 100 (Notable)
Turuvekere	India	Record daily precipitation	88.7 mm (3.5 in)	38 of 100 (Notable)
Versailles	United States	Record daily precipitation	36.3 mm (1.4 in)	37 of 100 (Notable)
Hatteras	United States	Record daily precipitation	66.3 mm (2.6 in)	37 of 100 (Notable)
Chiknayakanihall	India	Record daily precipitation	63.5 mm (2.5 in)	36 of 100 (Notable)
Haveri	India	Record daily precipitation	34.5 mm (1.4 in)	35 of 100 (Notable)
Aravakurichi	India	Record daily precipitation	86.2 mm (3.4 in)	35 of 100 (Notable)
Martinsville 2 SW	United States	Record daily precipitation	67.3 mm (2.6 in)	35 of 100 (Notable)
Sidlaghatta	India	Record daily precipitation	86.4 mm (3.4 in)	34 of 100 (Routine)
Randleman	United States	Record daily precipitation	50.8 mm (2.0 in)	34 of 100 (Routine)
Piqua	United States	Record daily precipitation	33.5 mm (1.3 in)	34 of 100 (Routine)
Kingston	United States	Record daily precipitation	41.9 mm (1.6 in)	34 of 100 (Routine)
Charlottesville 1 W	United States	Record daily precipitation	77.7 mm (3.1 in)	34 of 100 (Routine)
Rocky Mt	United States	Record daily precipitation	61.5 mm (2.4 in)	34 of 100 (Routine)
Karmad	India	Record daily precipitation	67.0 mm (2.6 in)	33 of 100 (Routine)
Arkalgud	India	Record daily precipitation	57.7 mm (2.3 in)	33 of 100 (Routine)
Durham	United Kingdom	Record high maximum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Cambridge City 3 N	United States	Record daily precipitation	47.8 mm (1.9 in)	32 of 100 (Routine)
Pleasant Hill	United States	Record daily precipitation	39.9 mm (1.6 in)	32 of 100 (Routine)
New Canton	United States	Record daily precipitation	70.6 mm (2.8 in)	32 of 100 (Routine)
Halifax Macrossan St	Australia	Record daily precipitation	25.1 mm (1.0 in)	31 of 100 (Routine)
Westernport	United States	Record daily precipitation	45.7 mm (1.8 in)	31 of 100 (Routine)
Port Lincoln (Woolga)	Australia	Record daily precipitation	26.4 mm (1.0 in)	30 of 100 (Routine)
Las Vigas	Mexico	Record daily precipitation	220.0 mm (8.7 in)	30 of 100 (Routine)
Farmland 5 NNW	United States	Record daily precipitation	54.4 mm (2.1 in)	30 of 100 (Routine)
Chestertown	United States	Record low maximum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Woodstock	United States	Record low maximum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Elkin	United States	Record daily precipitation	53.3 mm (2.1 in)	30 of 100 (Routine)
Oakland 1 SE	United States	Record daily precipitation	27.7 mm (1.1 in)	29 of 100 (Routine)
Blair	United States	Record daily precipitation	61.0 mm (2.4 in)	29 of 100 (Routine)
Stony River Dam	United States	Record daily precipitation	47.0 mm (1.9 in)	29 of 100 (Routine)
Dindigul	India	Record daily precipitation	71.0 mm (2.8 in)	28 of 100 (Routine)
Jefferson 2 E	United States	Record daily precipitation	43.4 mm (1.7 in)	28 of 100 (Routine)
Mt Airy 2 W	United States	Record daily precipitation	40.1 mm (1.6 in)	28 of 100 (Routine)
Sumter	United States	Record daily precipitation	66.8 mm (2.6 in)	28 of 100 (Routine)
Chintamani	India	Record daily precipitation	35.6 mm (1.4 in)	27 of 100 (Routine)
Iguala (Smn)	Mexico	Record daily precipitation	71.4 mm (2.8 in)	27 of 100 (Routine)
Arkadelphia 2 N	United States	Record low maximum temperature	24.4 C (75.9 F)	27 of 100 (Routine)
Eaton	United States	Record daily precipitation	81.8 mm (3.2 in)	27 of 100 (Routine)
Gundlupet	India	Record daily precipitation	39.4 mm (1.6 in)	26 of 100 (Routine)
Lake Placid 2 SW	United States	Record daily precipitation	70.4 mm (2.8 in)	26 of 100 (Routine)
Franklin 2 NNE	United States	Record daily precipitation	46.7 mm (1.8 in)	26 of 100 (Routine)
Noblesville River	United States	Record daily precipitation	42.7 mm (1.7 in)	26 of 100 (Routine)
Macon	United States	Record daily precipitation	30.5 mm (1.2 in)	26 of 100 (Routine)

Counts by Type and Timescale

414 records

Records set or tied on 20 September 1966 by type: Highest daily maximum 56, Lowest daily maximum 58, Highest daily minimum 43, Lowest daily minimum 14, Heaviest daily rainfall 243.

Records on 20 September 1966 by type
Record type	Records
Highest daily maximum	56
Lowest daily maximum	58
Highest daily minimum	43
Lowest daily minimum	14
Heaviest daily rainfall	243
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1966 by timescale: all-time 0, monthly 5, daily 409.

How Much Records Were Beaten By

346 broken records

Margins by which the 346 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 105.4. Ties are not counted.

Top 20 by Significance

20 September 1966

Top 20 records on 20 September 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1966	Monroe 2 SE, US	daily rain	143.0 mm (5.6 in)	105.4 mm (4.1 in)	23 years	53 of 100 (Notable)
20 September 1966	Marysville, US	daily rain	61.0 mm (2.4 in)	44.0 mm (1.7 in)	24 years	48 of 100 (Notable)
20 September 1966	W Manchester 3 WSW, US	daily rain	50.5 mm (2.0 in)	32.7 mm (1.3 in)	48 years	48 of 100 (Notable)
20 September 1966	Maxwell 3 NW, US	daily rain	38.1 mm (1.5 in)	27.9 mm (1.1 in)	37 years	46 of 100 (Notable)
20 September 1966	Catawba, US	daily rain	78.0 mm (3.1 in)	46.2 mm (1.8 in)	48 years	46 of 100 (Notable)
20 September 1966	Charlottesville 2W, US	daily rain	78.5 mm (3.1 in)	44.2 mm (1.7 in)	48 years	46 of 100 (Notable)
20 September 1966	Kodanand, IN	daily rain	83.1 mm (3.3 in)	31.5 mm (1.2 in)	60 years	45 of 100 (Notable)
20 September 1966	Hillsboro, US	daily rain	64.8 mm (2.6 in)	49.1 mm (1.9 in)	12 years	45 of 100 (Notable)
20 September 1966	Columbia 2SSE, US	daily rain	68.6 mm (2.7 in)	30.5 mm (1.2 in)	66 years	45 of 100 (Notable)
20 September 1966	Hambantota, LK	daily high min	26.3 C (79.3 F)	0.7 C (1.3 F)	93 years	44 of 100 (Notable)
20 September 1966	Bowling Green 1 E, US	daily rain	78.7 mm (3.1 in)	61.2 mm (2.4 in)	12 years	44 of 100 (Notable)
20 September 1966	Udumalpet, IN	monthly rain	76.6 mm (3.0 in)	19.7 mm (0.8 in)	30 years	43 of 100 (Notable)
20 September 1966	Southport 5 N, US	daily rain	101.6 mm (4.0 in)	47.8 mm (1.9 in)	68 years	43 of 100 (Notable)
20 September 1966	Culpeper, US	daily rain	68.6 mm (2.7 in)	38.1 mm (1.5 in)	48 years	42 of 100 (Notable)
20 September 1966	Sidney 2 N, US	daily rain	40.9 mm (1.6 in)	24.4 mm (1.0 in)	43 years	40 of 100 (Notable)
20 September 1966	Danville 2 SE, US	daily rain	65.5 mm (2.6 in)	30.7 mm (1.2 in)	48 years	40 of 100 (Notable)
20 September 1966	Louisa, US	daily rain	62.7 mm (2.5 in)	36.0 mm (1.4 in)	28 years	39 of 100 (Notable)
20 September 1966	Turuvekere, IN	daily rain	88.7 mm (3.5 in)	40.9 mm (1.6 in)	36 years	38 of 100 (Notable)
20 September 1966	Versailles, US	daily rain	36.3 mm (1.4 in)	24.1 mm (0.9 in)	43 years	37 of 100 (Notable)
20 September 1966	Hatteras, US	daily rain	66.3 mm (2.6 in)	25.7 mm (1.0 in)	64 years	37 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

1812 to 1966

Records set or tied on this calendar date in each year from 1812 to 1966. 1966 had 414 records.

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

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 1966-09-20: 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	294
20 to 40	40
40 to 60	9
60 to 80	2
80 to 100	0
100 to 120	1