Weather Records on 21 September 1966

565 weather records were set or tied worldwide on 21 September 1966. Highest significance: Hassan Obsy, IN.

Key Facts for 21 September 1966

On 21 September 1966, 565 weather records were set or tied at long-record stations worldwide.
181 were record highs and 134 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 556 daily.
Hassan Obsy set a daily record precipitation of 90.4 mm (3.6 in) on 21 September 1966.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 450 records.

Record Map

565 stations

565 station records on 21 September 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hassan Obsy	India	Record daily precipitation	90.4 mm (3.6 in)	64 of 100 (Major)
Lyndoch (Pewsey Vale)	Australia	Record daily precipitation	47.2 mm (1.9 in)	54 of 100 (Notable)
Newark Liberty Intl AP	United States	Record daily precipitation	119.6 mm (4.7 in)	53 of 100 (Notable)
Athens 5 NW	United States	Record daily precipitation	90.2 mm (3.6 in)	49 of 100 (Notable)
Ashbourne	Australia	Record daily precipitation	29.5 mm (1.2 in)	46 of 100 (Notable)
Ashland	United States	Record daily precipitation	66.0 mm (2.6 in)	46 of 100 (Notable)
Bloomfield	Canada	Record daily precipitation	45.0 mm (1.8 in)	44 of 100 (Notable)
Cape May 2 NW	United States	Record daily precipitation	77.7 mm (3.1 in)	43 of 100 (Notable)
Sattur	India	Record daily precipitation	65.0 mm (2.6 in)	41 of 100 (Notable)
Plainfield	United States	Record daily precipitation	135.4 mm (5.3 in)	40 of 100 (Notable)
Vardoe	Norway	Record low minimum temperature	-3.8 C (25.2 F)	39 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record high minimum temperature	6.6 C (43.9 F)	39 of 100 (Notable)
Ny City Cntrl Park	United States	Record daily precipitation	140.7 mm (5.5 in)	38 of 100 (Notable)
Cheraw	United States	Record daily precipitation	78.2 mm (3.1 in)	37 of 100 (Notable)
Aberdeen	United States	Record low maximum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Brockport	United States	Record daily precipitation	38.4 mm (1.5 in)	36 of 100 (Notable)
Ust-Umalta	Russia	Record daily precipitation	40.8 mm (1.6 in)	35 of 100 (Notable)
Mackay Lost Rvr Rs	United States	Record high minimum temperature	12.2 C (54.0 F)	33 of 100 (Routine)
Powhatan	United States	Record daily precipitation	59.2 mm (2.3 in)	33 of 100 (Routine)
Port Hastings	Canada	Record low minimum temperature	1.1 C (34.0 F)	32 of 100 (Routine)
Muzi	Russia	Record daily precipitation	27.4 mm (1.1 in)	32 of 100 (Routine)
Sierraville Rs	United States	Record high minimum temperature	12.2 C (54.0 F)	32 of 100 (Routine)
Aleksandrovsk-Sahalinskij	Russia	Record high minimum temperature	14.0 C (57.2 F)	31 of 100 (Routine)
Big Meadows	United States	Record daily precipitation	85.1 mm (3.4 in)	31 of 100 (Routine)
Belleville	Canada	Record daily precipitation	41.7 mm (1.6 in)	30 of 100 (Routine)
Nargund	India	Record daily precipitation	45.2 mm (1.8 in)	30 of 100 (Routine)
Colchester 2 W	United States	Record low maximum temperature	12.8 C (55.0 F)	30 of 100 (Routine)
Chestertown	United States	Record daily precipitation	58.2 mm (2.3 in)	30 of 100 (Routine)
Elizabeth	United States	Record low maximum temperature	15.6 C (60.1 F)	30 of 100 (Routine)
Siler City 2 N	United States	Record daily precipitation	52.8 mm (2.1 in)	30 of 100 (Routine)
Disraeli	Canada	Record daily precipitation	37.3 mm (1.5 in)	29 of 100 (Routine)
Miraj Obsy	India	Record daily precipitation	45.0 mm (1.8 in)	29 of 100 (Routine)
Tiruchengode	India	Record daily precipitation	79.1 mm (3.1 in)	29 of 100 (Routine)
Oswego	United States	Record daily precipitation	43.2 mm (1.7 in)	29 of 100 (Routine)
Warsaw 2 NW	United States	Record daily precipitation	63.0 mm (2.5 in)	29 of 100 (Routine)
Laurel 3 W	United States	Record daily precipitation	40.6 mm (1.6 in)	28 of 100 (Routine)
Keene	United States	Record low maximum temperature	13.9 C (57.0 F)	28 of 100 (Routine)
Stafford	United States	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Bennington 2 NNW	United States	Record low maximum temperature	12.8 C (55.0 F)	28 of 100 (Routine)
Rochester Gtr Intl	United States	Record daily precipitation	33.8 mm (1.3 in)	28 of 100 (Routine)
Willunga	Australia	Record daily precipitation	28.4 mm (1.1 in)	27 of 100 (Routine)
Isla Perez	Mexico	Record high maximum temperature	37.8 C (100.0 F)	27 of 100 (Routine)
Easton	United States	Record daily precipitation	57.2 mm (2.3 in)	27 of 100 (Routine)
Hightstown 2 W	United States	Record daily precipitation	132.1 mm (5.2 in)	27 of 100 (Routine)
Lockport 2SE	United States	Record daily precipitation	29.5 mm (1.2 in)	27 of 100 (Routine)
Griffiss AFB	United States	Record low maximum temperature	10.6 C (51.1 F)	27 of 100 (Routine)
Mount Compass	Australia	Record daily precipitation	35.8 mm (1.4 in)	26 of 100 (Routine)
Mudigere	India	Record daily precipitation	38.1 mm (1.5 in)	26 of 100 (Routine)
Tromso	Norway	Record snow depth	10.0 cm (3.9 in)	26 of 100 (Routine)
Virginia City	United States	Record high minimum temperature	10.0 C (50.0 F)	26 of 100 (Routine)
Cooperstown	United States	Record high minimum temperature	11.7 C (53.1 F)	26 of 100 (Routine)
Fillmore	United States	Record high minimum temperature	18.3 C (64.9 F)	26 of 100 (Routine)
Winchester 7 SE	United States	Record daily precipitation	42.7 mm (1.7 in)	26 of 100 (Routine)
Koppa(Balgadi)	India	Record daily precipitation	50.8 mm (2.0 in)	25 of 100 (Routine)
Arhara	Russia	Record daily precipitation	27.4 mm (1.1 in)	25 of 100 (Routine)
Oolitic Purdue Ex Fm	United States	Record daily precipitation	29.7 mm (1.2 in)	25 of 100 (Routine)
Millington 1 SE	United States	Record daily precipitation	64.8 mm (2.6 in)	25 of 100 (Routine)
Choteau	United States	Record high maximum temperature	31.1 C (88.0 F)	25 of 100 (Routine)
Alta 1 NNW	United States	Record high minimum temperature	8.9 C (48.0 F)	25 of 100 (Routine)
Hampshire (Neena Road)	Australia	Record daily precipitation	29.2 mm (1.1 in)	24 of 100 (Routine)

Counts by Type and Timescale

565 records

Records set or tied on 21 September 1966 by type: Highest daily maximum 119, Lowest daily maximum 108, Highest daily minimum 62, Lowest daily minimum 26, Heaviest daily rainfall 248, Deepest snow cover 2.

Records on 21 September 1966 by type
Record type	Records
Highest daily maximum	119
Lowest daily maximum	108
Highest daily minimum	62
Lowest daily minimum	26
Heaviest daily rainfall	248
Heaviest daily snowfall	0
Deepest snow cover	2

Records on 21 September 1966 by timescale: all-time 0, monthly 9, daily 556.

How Much Records Were Beaten By

461 broken records

Margins by which the 461 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 100.0. Ties are not counted.

Top 20 by Significance

21 September 1966

Top 20 records on 21 September 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1966	Hassan Obsy, IN	daily rain	90.4 mm (3.6 in)	45.9 mm (1.8 in)	63 years	64 of 100 (Major)
21 September 1966	Lyndoch (Pewsey Vale), AU	daily rain	47.2 mm (1.9 in)	17.7 mm (0.7 in)	79 years	54 of 100 (Notable)
21 September 1966	Newark Liberty Intl AP, US	daily rain	119.6 mm (4.7 in)	63.7 mm (2.5 in)	28 years	53 of 100 (Notable)
21 September 1966	Athens 5 NW, US	daily rain	90.2 mm (3.6 in)	55.7 mm (2.2 in)	8 years	49 of 100 (Notable)
21 September 1966	Ashbourne, AU	daily rain	29.5 mm (1.2 in)	12.0 mm (0.5 in)	79 years	46 of 100 (Notable)
21 September 1966	Ashland, US	daily rain	66.0 mm (2.6 in)	34.0 mm (1.3 in)	52 years	46 of 100 (Notable)
21 September 1966	Bloomfield, CA	daily rain	45.0 mm (1.8 in)	19.6 mm (0.8 in)	52 years	44 of 100 (Notable)
21 September 1966	Cape May 2 NW, US	daily rain	77.7 mm (3.1 in)	54.1 mm (2.1 in)	12 years	43 of 100 (Notable)
21 September 1966	Sattur, IN	daily rain	65.0 mm (2.6 in)	26.4 mm (1.0 in)	48 years	41 of 100 (Notable)
21 September 1966	Plainfield, US	monthly rain	135.4 mm (5.3 in)	10.9 mm (0.4 in)	61 years	40 of 100 (Notable)
21 September 1966	Vardoe, NO	daily low min	-3.8 C (25.2 F)	3.8 C (6.8 F)	64 years	39 of 100 (Notable)
21 September 1966	Col du Grand St-Bernard, CH	daily high min	6.6 C (43.9 F)	0.8 C (1.4 F)	92 years	39 of 100 (Notable)
21 September 1966	Ny City Cntrl Park, US	daily rain	140.7 mm (5.5 in)	37.8 mm (1.5 in)	28 years	38 of 100 (Notable)
21 September 1966	Cheraw, US	daily rain	78.2 mm (3.1 in)	28.9 mm (1.1 in)	51 years	37 of 100 (Notable)
21 September 1966	Aberdeen, US	daily low max	17.8 C (64.0 F)	3.9 C (7.0 F)	66 years	36 of 100 (Notable)
21 September 1966	Brockport, US	daily rain	38.4 mm (1.5 in)	14.5 mm (0.6 in)	44 years	36 of 100 (Notable)
21 September 1966	Ust-Umalta, RU	daily rain	40.8 mm (1.6 in)	22.4 mm (0.9 in)	17 years	35 of 100 (Notable)
21 September 1966	Mackay Lost Rvr Rs, US	daily high min	12.2 C (54.0 F)	5.5 C (9.9 F)	44 years	33 of 100 (Routine)
21 September 1966	Powhatan, US	daily rain	59.2 mm (2.3 in)	40.1 mm (1.6 in)	8 years	33 of 100 (Routine)
21 September 1966	Port Hastings, CA	daily low min	1.1 C (34.0 F)	1.1 C (2.0 F)	70 years	32 of 100 (Routine)

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

1805 to 1966

Records set or tied on this calendar date in each year from 1805 to 1966. 1966 had 565 records.

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

Records on 09-21 in each year
Year	Records
1805	1
1812	1
1825	2
1840	1
1841	1
1842	1
1848	1
1854	1
1856	2
1868	1
1872	2
1873	1
1877	1
1878	1
1881	1
1882	1
1884	1
1886	1
1888	2
1889	1
1891	10
1892	1
1893	10
1894	2
1895	3
1896	2
1897	6
1898	6
1899	3
1900	2
1901	5
1902	5
1903	8
1904	20
1905	12
1906	17
1907	10
1908	17
1909	10
1910	8
1911	18
1912	26
1913	37
1914	29
1915	34
1916	48
1917	28
1918	43
1919	54
1920	29
1921	64
1922	35
1923	232
1924	291
1925	278
1926	178
1927	165
1928	81
1929	232
1930	82
1931	681
1932	242
1933	193
1934	492
1935	199
1936	329
1937	487
1938	508
1939	308
1940	908
1941	416
1942	291
1943	407
1944	413
1945	507
1946	176
1947	534
1948	301
1949	298
1950	334
1951	241
1952	430
1953	382
1954	453
1955	752
1956	1,100
1957	366
1958	588
1959	513
1960	418
1961	441
1962	1,085
1963	306
1964	374
1965	1,088
1966	565
1967	577
1968	790
1969	593
1970	708
1971	645
1972	599
1973	421
1974	652
1975	528
1976	694
1977	918
1978	818
1979	736
1980	990
1981	696
1982	1,484
1983	2,207
1984	707
1985	796
1986	671
1987	965
1988	557
1989	1,002
1990	716
1991	1,021
1992	752
1993	911
1994	713
1995	2,002
1996	1,233
1997	1,112
1998	1,481
1999	1,025
2000	884
2001	718
2002	696
2003	959
2004	888
2005	1,143
2006	920
2007	742
2008	740
2009	715
2010	1,290
2011	542
2012	595
2013	769
2014	716
2015	565
2016	989
2017	1,178
2018	1,051
2019	833
2020	580
2021	465
2022	1,049
2023	783
2024	470
2025	588
2026	469

Download the Data

Data for records on 1966-09-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 20	437
20 to 40	17
40 to 60	5
60 to 80	1
80 to 100	1