Weather Records on 17 October 1966

551 weather records were set or tied worldwide on 17 October 1966. Highest significance: Manassa, US.

Key Facts for 17 October 1966

On 17 October 1966, 551 weather records were set or tied at long-record stations worldwide.
31 were record highs and 351 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 547 daily.
Manassa set a daily record snowfall of 15.2 cm (6.0 in) on 17 October 1966.
Across 162 earlier years (1793 to 2025) the same calendar date averaged 439 records.

Record Map

551 stations

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

Weather records on 17 October 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Manassa	United States	Record daily snowfall	15.2 cm (6.0 in)	58 of 100 (Notable)
Theethandathanam	India	Record daily precipitation	102.0 mm (4.0 in)	50 of 100 (Notable)
Mundo Novo	Brazil	Record daily precipitation	45.6 mm (1.8 in)	45 of 100 (Notable)
Kartaly	Russia	Record daily precipitation	27.3 mm (1.1 in)	43 of 100 (Notable)
Eads	United States	Record daily snowfall	10.2 cm (4.0 in)	43 of 100 (Notable)
Aurora	Brazil	Record daily precipitation	56.3 mm (2.2 in)	42 of 100 (Notable)
Blanca 4 NW	United States	Record daily snowfall	10.2 cm (4.0 in)	42 of 100 (Notable)
Green Rvr	United States	Record low maximum temperature	-5.0 C (23.0 F)	40 of 100 (Notable)
Des Moines	United States	Record daily snowfall	10.2 cm (4.0 in)	39 of 100 (Notable)
Tres Piedras	United States	Record daily snowfall	10.2 cm (4.0 in)	38 of 100 (Notable)
Celaya (Smn)	Mexico	Record daily precipitation	79.5 mm (3.1 in)	37 of 100 (Notable)
Amderma	Russia	Record low maximum temperature	-14.8 C (5.4 F)	37 of 100 (Notable)
Karesuando	Sweden	Record snow depth	35.0 cm (13.8 in)	37 of 100 (Notable)
Springkell	South Africa	Record daily precipitation	42.0 mm (1.7 in)	36 of 100 (Notable)
Cimarron 4 SW	United States	Record daily snowfall	5.1 cm (2.0 in)	36 of 100 (Notable)
Paca-Ata	Kyrgyzstan	Record daily precipitation	45.3 mm (1.8 in)	35 of 100 (Notable)
Cidra 1 E	Puerto Rico [United States]	Record daily precipitation	96.3 mm (3.8 in)	34 of 100 (Routine)
Pretoria-New Cemetry	South Africa	Record daily precipitation	48.0 mm (1.9 in)	34 of 100 (Routine)
Windsor	United States	Record low minimum temperature	-2.8 C (27.0 F)	34 of 100 (Routine)
Thathaiengarpet	India	Record daily precipitation	65.0 mm (2.6 in)	33 of 100 (Routine)
Champagne (Naf)	South Africa	Record daily precipitation	45.5 mm (1.8 in)	33 of 100 (Routine)
Winkelman 6 S	United States	Record low minimum temperature	-0.6 C (30.9 F)	33 of 100 (Routine)
Pocahontas 1	United States	Record low maximum temperature	13.3 C (55.9 F)	33 of 100 (Routine)
Griggsville	United States	Record low maximum temperature	5.6 C (42.1 F)	33 of 100 (Routine)
Somerville 4 NW	United States	Record low maximum temperature	10.6 C (51.1 F)	33 of 100 (Routine)
Te Kowai Exp STN	Australia	Record low minimum temperature	6.1 C (43.0 F)	32 of 100 (Routine)
Aul Turara Ryskulov	Kazakhstan	Record daily precipitation	51.0 mm (2.0 in)	32 of 100 (Routine)
St Charles Elm Pt	United States	Record low maximum temperature	7.2 C (45.0 F)	32 of 100 (Routine)
Ottapalam	India	Record daily precipitation	78.2 mm (3.1 in)	31 of 100 (Routine)
Madha	India	Record daily precipitation	38.1 mm (1.5 in)	31 of 100 (Routine)
Salique (Bos)	South Africa	Record daily precipitation	59.0 mm (2.3 in)	31 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record snow depth	26.0 cm (10.2 in)	31 of 100 (Routine)
Mt Ida 3 SE	United States	Record low maximum temperature	13.9 C (57.0 F)	31 of 100 (Routine)
Red Rvr	United States	Record daily snowfall	15.2 cm (6.0 in)	31 of 100 (Routine)
El Reno 1 N	United States	Record low minimum temperature	0.0 C (32.0 F)	31 of 100 (Routine)
Hot Springs 1 NNE	United States	Record low maximum temperature	14.4 C (57.9 F)	30 of 100 (Routine)
Subiaco	United States	Record low maximum temperature	14.4 C (57.9 F)	30 of 100 (Routine)
Rangely 1E	United States	Record low minimum temperature	-7.8 C (18.0 F)	30 of 100 (Routine)
Houston	United States	Record low minimum temperature	-3.3 C (26.1 F)	30 of 100 (Routine)
Healdton 3 E	United States	Record low maximum temperature	13.9 C (57.0 F)	30 of 100 (Routine)
Salekhard	Russia	Record low minimum temperature	-19.6 C (-3.3 F)	29 of 100 (Routine)
Shelbyville 1 E	United States	Record low maximum temperature	9.4 C (48.9 F)	29 of 100 (Routine)
College Park	United States	Record low maximum temperature	12.8 C (55.0 F)	29 of 100 (Routine)
Ashland	United States	Record low minimum temperature	-3.3 C (26.1 F)	28 of 100 (Routine)
Mt Vernon 3 SW	United States	Record low maximum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Windsor	United States	Record low maximum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Indian Mills 2 W	United States	Record low maximum temperature	12.2 C (54.0 F)	28 of 100 (Routine)
Capulin 6 SSE	United States	Record daily snowfall	7.6 cm (3.0 in)	28 of 100 (Routine)
Stillwater 2 W	United States	Record low minimum temperature	-1.1 C (30.0 F)	28 of 100 (Routine)
Praha-Klementinum	Czech Republic	Record high minimum temperature	13.2 C (55.8 F)	27 of 100 (Routine)
Krugersdorp	South Africa	Record daily precipitation	39.2 mm (1.5 in)	27 of 100 (Routine)
Pretoria-Burgerspark	South Africa	Record daily precipitation	36.5 mm (1.4 in)	27 of 100 (Routine)
Gemsbokfontein	South Africa	Record daily precipitation	36.0 mm (1.4 in)	27 of 100 (Routine)
Sells	United States	Record low minimum temperature	3.9 C (39.0 F)	27 of 100 (Routine)
Searcy	United States	Record low maximum temperature	14.4 C (57.9 F)	27 of 100 (Routine)
Parsons 3 SE	United States	Record low maximum temperature	8.9 C (48.0 F)	27 of 100 (Routine)
Thadikarekonam	India	Record daily precipitation	81.0 mm (3.2 in)	26 of 100 (Routine)
Suolovuopmi	Norway	Record snow depth	35.0 cm (13.8 in)	26 of 100 (Routine)
Amderma	Russia	Record low minimum temperature	-21.2 C (-6.2 F)	26 of 100 (Routine)
Portland	United States	Record low maximum temperature	15.6 C (60.1 F)	26 of 100 (Routine)

Counts by Type and Timescale

551 records

Records set or tied on 17 October 1966 by type: Highest daily maximum 5, Lowest daily maximum 236, Highest daily minimum 26, Lowest daily minimum 115, Heaviest daily rainfall 140, Heaviest daily snowfall 19, Deepest snow cover 10.

Records on 17 October 1966 by type
Record type	Records
Highest daily maximum	5
Lowest daily maximum	236
Highest daily minimum	26
Lowest daily minimum	115
Heaviest daily rainfall	140
Heaviest daily snowfall	19
Deepest snow cover	10

Records on 17 October 1966 by timescale: all-time 0, monthly 4, daily 547.

How Much Records Were Beaten By

443 broken records

Margins by which the 443 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 180.0. Ties are not counted.

Top 20 by Significance

17 October 1966

Top 20 records on 17 October 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 October 1966	Manassa, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	72 years	58 of 100 (Notable)
17 October 1966	Theethandathanam, IN	daily rain	102.0 mm (4.0 in)	63.1 mm (2.5 in)	43 years	50 of 100 (Notable)
17 October 1966	Mundo Novo, BR	daily rain	45.6 mm (1.8 in)	35.6 mm (1.4 in)	24 years	45 of 100 (Notable)
17 October 1966	Kartaly, RU	daily rain	27.3 mm (1.1 in)	23.9 mm (0.9 in)	3 years	43 of 100 (Notable)
17 October 1966	Eads, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	59 years	43 of 100 (Notable)
17 October 1966	Aurora, BR	daily rain	56.3 mm (2.2 in)	29.9 mm (1.2 in)	43 years	42 of 100 (Notable)
17 October 1966	Blanca 4 NW, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	56 years	42 of 100 (Notable)
17 October 1966	Green Rvr, US	daily low max	-5.0 C (23.0 F)	10.0 C (18.0 F)	57 years	40 of 100 (Notable)
17 October 1966	Des Moines, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	49 years	39 of 100 (Notable)
17 October 1966	Tres Piedras, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	60 years	38 of 100 (Notable)
17 October 1966	Celaya (Smn), MX	monthly rain	79.5 mm (3.1 in)	12.2 mm (0.5 in)	36 years	37 of 100 (Notable)
17 October 1966	Amderma, RU	daily low max	-14.8 C (5.4 F)	9.7 C (17.5 F)	24 years	37 of 100 (Notable)
17 October 1966	Karesuando, SE	daily snow depth	35.0 cm (13.8 in)	18.0 cm (7.1 in)	0 years	37 of 100 (Notable)
17 October 1966	Springkell, ZA	daily rain	42.0 mm (1.7 in)	26.5 mm (1.0 in)	24 years	36 of 100 (Notable)
17 October 1966	Cimarron 4 SW, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	61 years	36 of 100 (Notable)
17 October 1966	Paca-Ata, KG	daily rain	45.3 mm (1.8 in)	23.0 mm (0.9 in)	0 years	35 of 100 (Notable)
17 October 1966	Cidra 1 E, PR	daily rain	96.3 mm (3.8 in)	39.9 mm (1.6 in)	17 years	34 of 100 (Routine)
17 October 1966	Pretoria-New Cemetry, ZA	daily rain	48.0 mm (1.9 in)	24.4 mm (1.0 in)	21 years	34 of 100 (Routine)
17 October 1966	Windsor, US	daily low min	-2.8 C (27.0 F)	3.9 C (7.0 F)	67 years	34 of 100 (Routine)
17 October 1966	Thathaiengarpet, IN	daily rain	65.0 mm (2.6 in)	25.9 mm (1.0 in)	49 years	33 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

1793 to 1966

Records set or tied on this calendar date in each year from 1793 to 1966. 1966 had 551 records.

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

Records on 10-17 in each year
Year	Records
1793	1
1796	2
1808	2
1810	1
1811	1
1817	1
1820	1
1830	1
1836	1
1844	1
1845	1
1868	1
1869	2
1870	1
1872	1
1874	1
1875	1
1876	3
1877	1
1878	1
1879	7
1881	1
1882	1
1883	1
1884	2
1885	2
1886	1
1889	1
1890	3
1891	2
1892	6
1893	5
1894	2
1895	1
1897	3
1898	6
1899	3
1900	3
1901	3
1902	4
1903	9
1904	17
1905	12
1906	3
1907	16
1908	46
1909	18
1910	13
1911	24
1912	12
1913	26
1914	72
1915	7
1916	81
1917	29
1918	20
1919	34
1920	82
1921	64
1922	60
1923	149
1924	81
1925	324
1926	153
1927	163
1928	530
1929	119
1930	441
1931	431
1932	345
1933	190
1934	262
1935	337
1936	338
1937	865
1938	710
1939	424
1940	580
1941	194
1942	349
1943	1,173
1944	415
1945	289
1946	437
1947	744
1948	724
1949	442
1950	809
1951	274
1952	474
1953	463
1954	579
1955	562
1956	353
1957	245
1958	415
1959	403
1960	432
1961	525
1962	350
1963	513
1964	492
1965	920
1966	551
1967	576
1968	929
1969	714
1970	815
1971	1,053
1972	866
1973	542
1974	1,055
1975	605
1976	1,381
1977	1,060
1978	583
1979	468
1980	1,366
1981	555
1982	575
1983	526
1984	1,551
1985	585
1986	354
1987	828
1988	827
1989	1,163
1990	1,109
1991	1,352
1992	1,384
1993	1,001
1994	1,306
1995	1,076
1996	987
1997	1,114
1998	1,455
1999	815
2000	461
2001	878
2002	992
2003	764
2004	935
2005	643
2006	1,506
2007	690
2008	467
2009	1,606
2010	625
2011	734
2012	550
2013	516
2014	530
2015	843
2016	1,559
2017	743
2018	1,163
2019	504
2020	889
2021	294
2022	964
2023	544
2024	994
2025	363

Download the Data

Data for records on 1966-10-17: 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).

Margin	Records
0 to 25	410
25 to 50	19
50 to 75	4
75 to 100	2
100 to 125	6
125 to 150	0
150 to 175	1
175 to 200	1