Weather Records on 17 September 1966

523 weather records were set or tied worldwide on 17 September 1966. Highest significance: Sibasa, ZA.

Key Facts for 17 September 1966

On 17 September 1966, 523 weather records were set or tied at long-record stations worldwide.
59 were record highs and 188 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 9 monthly and 513 daily.
Sibasa set a monthly record daily precipitation of 82.0 mm (3.2 in) on 17 September 1966.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 422 records.

Record Map

523 stations

523 station records on 17 September 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sibasa	South Africa	Record daily precipitation	82.0 mm (3.2 in)	64 of 100 (Major)
Ghanzi	Botswana	Record daily precipitation	29.0 mm (1.1 in)	61 of 100 (Major)
Bordertown	Australia	Record daily precipitation	37.6 mm (1.5 in)	58 of 100 (Notable)
New Norfolk	Australia	Record daily precipitation	30.0 mm (1.2 in)	55 of 100 (Notable)
Mantova	Italy	Record daily precipitation	64.2 mm (2.5 in)	55 of 100 (Notable)
Pesaro	Italy	Record daily precipitation	133.6 mm (5.3 in)	55 of 100 (Notable)
Weltevrede	South Africa	Record daily precipitation	35.0 mm (1.4 in)	51 of 100 (Notable)
Tshakhuma	South Africa	Record daily precipitation	80.5 mm (3.2 in)	48 of 100 (Notable)
Interlaken	Australia	Record daily precipitation	39.4 mm (1.6 in)	47 of 100 (Notable)
Vryburg (Pol)	South Africa	Record daily precipitation	25.0 mm (1.0 in)	47 of 100 (Notable)
Berkeley	United States	Record low minimum temperature	5.6 C (42.1 F)	46 of 100 (Notable)
Wolseley	Australia	Record daily precipitation	25.1 mm (1.0 in)	44 of 100 (Notable)
Rossarden (Aberfoyle)	Australia	Record daily precipitation	50.3 mm (2.0 in)	44 of 100 (Notable)
Mathinna (Fingal Road)	Australia	Record daily precipitation	51.1 mm (2.0 in)	44 of 100 (Notable)
Swan Island Lighthouse	Australia	Record daily precipitation	34.3 mm (1.4 in)	44 of 100 (Notable)
Bordertown (Karrawirra)	Australia	Record daily precipitation	33.3 mm (1.3 in)	42 of 100 (Notable)
Serviceton	Australia	Record daily precipitation	27.7 mm (1.1 in)	42 of 100 (Notable)
Ravenshill	South Africa	Record daily precipitation	46.5 mm (1.8 in)	42 of 100 (Notable)
Supa	India	Record daily precipitation	55.9 mm (2.2 in)	41 of 100 (Notable)
Mazapa	Mexico	Record daily precipitation	38.9 mm (1.5 in)	41 of 100 (Notable)
Rienzi	South Africa	Record daily precipitation	34.8 mm (1.4 in)	41 of 100 (Notable)
Oatlands Post Office	Australia	Record daily precipitation	28.7 mm (1.1 in)	40 of 100 (Notable)
Edenville (Mun)	South Africa	Record daily precipitation	36.5 mm (1.4 in)	40 of 100 (Notable)
Lake Leake (Elizabeth River)	Australia	Record daily precipitation	47.0 mm (1.9 in)	39 of 100 (Notable)
Kodanand	India	Record daily precipitation	59.9 mm (2.4 in)	38 of 100 (Notable)
Leeuspruit Wes	South Africa	Record daily precipitation	40.0 mm (1.6 in)	38 of 100 (Notable)
St Marys (Cullenswood)	Australia	Record daily precipitation	76.5 mm (3.0 in)	36 of 100 (Notable)
Shannon Hec	Australia	Record daily precipitation	33.3 mm (1.3 in)	36 of 100 (Notable)
Alouette Lake	Canada	Record daily precipitation	46.2 mm (1.8 in)	36 of 100 (Notable)
Vryburg	South Africa	Record daily precipitation	59.3 mm (2.3 in)	36 of 100 (Notable)
Fort William	Australia	Record daily precipitation	36.8 mm (1.4 in)	34 of 100 (Routine)
Forbes (Camp Street)	Australia	Record low maximum temperature	12.2 C (54.0 F)	32 of 100 (Routine)
Moorina (Frome Dam)	Australia	Record daily precipitation	58.4 mm (2.3 in)	32 of 100 (Routine)
Alta Lake 2	Canada	Record daily precipitation	33.5 mm (1.3 in)	32 of 100 (Routine)
Rocco	South Africa	Record daily precipitation	29.2 mm (1.1 in)	32 of 100 (Routine)
Sulphur Springs	United States	Record low maximum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Falls City Brenner Fld	United States	Record daily precipitation	40.6 mm (1.6 in)	32 of 100 (Routine)
Strathbogie	Australia	Record daily precipitation	38.1 mm (1.5 in)	31 of 100 (Routine)
Stave Falls	Canada	Record daily precipitation	40.1 mm (1.6 in)	30 of 100 (Routine)
Hassan Obsy	India	Record daily precipitation	54.2 mm (2.1 in)	30 of 100 (Routine)
Roodepoort	South Africa	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Wexford	South Africa	Record daily precipitation	31.5 mm (1.2 in)	30 of 100 (Routine)
Alexandria	United States	Record low maximum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Rocky Mt	United States	Record low minimum temperature	3.3 C (37.9 F)	30 of 100 (Routine)
Leuctra	South Africa	Record daily precipitation	27.5 mm (1.1 in)	29 of 100 (Routine)
Schoongezicht	South Africa	Record daily precipitation	25.0 mm (1.0 in)	29 of 100 (Routine)
Calhoun 2 N	United States	Record low maximum temperature	21.1 C (70.0 F)	29 of 100 (Routine)
Raleigh State UNIV	United States	Record low minimum temperature	7.8 C (46.0 F)	29 of 100 (Routine)
Anadarko 3 E	United States	Record low maximum temperature	21.1 C (70.0 F)	29 of 100 (Routine)
Padthaway (Marcollat)	Australia	Record daily precipitation	35.6 mm (1.4 in)	28 of 100 (Routine)
Whitemark	Australia	Record daily precipitation	25.9 mm (1.0 in)	28 of 100 (Routine)
Tunnel Camp	Canada	Record daily precipitation	52.1 mm (2.1 in)	28 of 100 (Routine)
Chinnar	India	Record daily precipitation	37.1 mm (1.5 in)	28 of 100 (Routine)
Witbankfontein	South Africa	Record daily precipitation	26.7 mm (1.1 in)	28 of 100 (Routine)
Plain Dealing	United States	Record low maximum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Birch Tree	United States	Record low minimum temperature	2.8 C (37.0 F)	28 of 100 (Routine)
Durham	United States	Record low minimum temperature	4.4 C (39.9 F)	28 of 100 (Routine)
Nacogdoches	United States	Record low maximum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Clearwater	United States	Record daily precipitation	41.9 mm (1.6 in)	28 of 100 (Routine)
Goldsboro 4 SE	United States	Record low minimum temperature	6.1 C (43.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

523 records

Records set or tied on 17 September 1966 by type: Highest daily maximum 14, Lowest daily maximum 85, Highest daily minimum 45, Lowest daily minimum 103, Heaviest daily rainfall 276.

Records on 17 September 1966 by type
Record type	Records
Highest daily maximum	14
Lowest daily maximum	85
Highest daily minimum	45
Lowest daily minimum	103
Heaviest daily rainfall	276
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 September 1966 by timescale: all-time 1, monthly 9, daily 513.

How Much Records Were Beaten By

439 broken records

Margins by which the 439 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 50.5. Ties are not counted.

Top 20 by Significance

17 September 1966

Top 20 records on 17 September 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1966	Sibasa, ZA	monthly rain	82.0 mm (3.2 in)	27.4 mm (1.1 in)	59 years	64 of 100 (Major)
17 September 1966	Ghanzi, BW	monthly rain	29.0 mm (1.1 in)	18.1 mm (0.7 in)	25 years	61 of 100 (Major)
17 September 1966	Bordertown, AU	daily rain	37.6 mm (1.5 in)	22.6 mm (0.9 in)	36 years	58 of 100 (Notable)
17 September 1966	New Norfolk, AU	daily rain	30.0 mm (1.2 in)	15.5 mm (0.6 in)	27 years	55 of 100 (Notable)
17 September 1966	Mantova, IT	daily rain	64.2 mm (2.5 in)	30.0 mm (1.2 in)	55 years	55 of 100 (Notable)
17 September 1966	Pesaro, IT	all-time rain	133.6 mm (5.3 in)	3.8 mm (0.15 in)	81 years	55 of 100 (Notable)
17 September 1966	Weltevrede, ZA	daily rain	35.0 mm (1.4 in)	35.0 mm (1.4 in)	52 years	51 of 100 (Notable)
17 September 1966	Tshakhuma, ZA	daily rain	80.5 mm (3.2 in)	50.5 mm (2.0 in)	9 years	48 of 100 (Notable)
17 September 1966	Interlaken, AU	daily rain	39.4 mm (1.6 in)	21.6 mm (0.9 in)	5 years	47 of 100 (Notable)
17 September 1966	Vryburg (Pol), ZA	daily rain	25.0 mm (1.0 in)	20.4 mm (0.8 in)	52 years	47 of 100 (Notable)
17 September 1966	Berkeley, US	daily low min	5.6 C (42.1 F)	3.8 C (6.8 F)	60 years	46 of 100 (Notable)
17 September 1966	Wolseley, AU	daily rain	25.1 mm (1.0 in)	9.4 mm (0.37 in)	69 years	44 of 100 (Notable)
17 September 1966	Rossarden (Aberfoyle), AU	daily rain	50.3 mm (2.0 in)	26.4 mm (1.0 in)	23 years	44 of 100 (Notable)
17 September 1966	Mathinna (Fingal Road), AU	daily rain	51.1 mm (2.0 in)	19.3 mm (0.8 in)	44 years	44 of 100 (Notable)
17 September 1966	Swan Island Lighthouse, AU	daily rain	34.3 mm (1.4 in)	11.4 mm (0.4 in)	44 years	44 of 100 (Notable)
17 September 1966	Bordertown (Karrawirra), AU	daily rain	33.3 mm (1.3 in)	16.0 mm (0.6 in)	32 years	42 of 100 (Notable)
17 September 1966	Serviceton, AU	daily rain	27.7 mm (1.1 in)	14.0 mm (0.6 in)	31 years	42 of 100 (Notable)
17 September 1966	Ravenshill, ZA	daily rain	46.5 mm (1.8 in)	27.9 mm (1.1 in)	9 years	42 of 100 (Notable)
17 September 1966	Supa, IN	daily rain	55.9 mm (2.2 in)	29.5 mm (1.2 in)	39 years	41 of 100 (Notable)
17 September 1966	Mazapa, MX	daily rain	38.9 mm (1.5 in)	25.4 mm (1.0 in)	23 years	41 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

1796 to 1966

Records set or tied on this calendar date in each year from 1796 to 1966. 1966 had 523 records.

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

Records on 09-17 in each year
Year	Records
1796	1
1797	1
1805	1
1833	1
1834	1
1837	2
1845	1
1847	3
1848	1
1850	1
1851	2
1853	2
1854	2
1859	1
1862	1
1867	1
1870	1
1871	1
1872	1
1873	1
1874	1
1875	1
1877	1
1881	1
1882	2
1884	3
1885	3
1886	6
1888	2
1889	8
1891	1
1893	3
1894	1
1895	4
1896	9
1897	4
1898	7
1899	1
1900	4
1901	5
1902	5
1903	28
1904	2
1905	17
1906	10
1907	15
1908	13
1909	7
1910	38
1911	15
1912	17
1913	28
1914	38
1915	48
1916	40
1917	255
1918	41
1919	21
1920	40
1921	66
1922	47
1923	159
1924	80
1925	338
1926	154
1927	420
1928	78
1929	168
1930	147
1931	564
1932	425
1933	415
1934	246
1935	321
1936	219
1937	463
1938	363
1939	294
1940	326
1941	328
1942	581
1943	513
1944	403
1945	614
1946	620
1947	680
1948	630
1949	292
1950	412
1951	359
1952	263
1953	344
1954	449
1955	649
1956	437
1957	405
1958	806
1959	1,210
1960	385
1961	657
1962	432
1963	297
1964	559
1965	1,394
1966	523
1967	331
1968	691
1969	352
1970	412
1971	898
1972	556
1973	638
1974	491
1975	478
1976	636
1977	641
1978	764
1979	804
1980	794
1981	1,155
1982	606
1983	862
1984	1,006
1985	448
1986	1,314
1987	926
1988	982
1989	863
1990	650
1991	1,407
1992	686
1993	950
1994	986
1995	1,145
1996	1,342
1997	1,057
1998	1,137
1999	1,102
2000	1,318
2001	895
2002	1,025
2003	586
2004	872
2005	1,042
2006	1,344
2007	752
2008	886
2009	871
2010	907
2011	1,116
2012	597
2013	1,253
2014	571
2015	953
2016	707
2017	455
2018	899
2019	774
2020	651
2021	345
2022	313
2023	646
2024	954
2025	634
2026	968

Download the Data

Data for records on 1966-09-17: 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).