Weather Records on 17 October 1970

815 weather records were set or tied worldwide on 17 October 1970. Highest significance: Harrington Harbour, CA.

Key Facts for 17 October 1970

On 17 October 1970, 815 weather records were set or tied at long-record stations worldwide.
42 were record highs and 687 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 13 monthly and 802 daily.
Harrington Harbour set a daily record precipitation of 55.1 mm (2.2 in) on 17 October 1970.
Across 162 earlier years (1793 to 2025) the same calendar date averaged 437 records.

Record Map

815 stations

815 station records on 17 October 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 October 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Harrington Harbour	Canada	Record daily precipitation	55.1 mm (2.2 in)	54 of 100 (Notable)
Skaneateles	United States	Record daily snowfall	15.2 cm (6.0 in)	52 of 100 (Notable)
Windhoek	Namibia	Record daily precipitation	39.0 mm (1.5 in)	51 of 100 (Notable)
Ste Rose du Degelis	Canada	Record daily snowfall	16.0 cm (6.3 in)	46 of 100 (Notable)
Port Hastings	Canada	Record daily precipitation	45.2 mm (1.8 in)	43 of 100 (Notable)
Atlantic City Marina	United States	Record low maximum temperature	8.3 C (46.9 F)	43 of 100 (Notable)
Colorado City	United States	Record low maximum temperature	10.0 C (50.0 F)	42 of 100 (Notable)
Grindstone Island	Canada	Record daily precipitation	36.3 mm (1.4 in)	41 of 100 (Notable)
Causapscal	Canada	Record daily snowfall	18.3 cm (7.2 in)	40 of 100 (Notable)
Pearl	United States	Record low maximum temperature	7.2 C (45.0 F)	40 of 100 (Notable)
Taunton	United States	Record low maximum temperature	5.0 C (41.0 F)	39 of 100 (Notable)
Cortland	United States	Record daily snowfall	5.1 cm (2.0 in)	39 of 100 (Notable)
Raleigh State UNIV	United States	Record low minimum temperature	0.0 C (32.0 F)	39 of 100 (Notable)
Ny City Cntrl Park	United States	Record low maximum temperature	8.3 C (46.9 F)	39 of 100 (Notable)
La Pocatiere Cda	Canada	Record daily snowfall	15.2 cm (6.0 in)	38 of 100 (Notable)
Kuzhithurai	India	Record daily precipitation	106.7 mm (4.2 in)	38 of 100 (Notable)
Nashua 2 NNW	United States	Record low maximum temperature	6.1 C (43.0 F)	38 of 100 (Notable)
Sloan 3 S	United States	Record low maximum temperature	14.4 C (57.9 F)	38 of 100 (Notable)
Crosbyton	United States	Record low maximum temperature	5.0 C (41.0 F)	38 of 100 (Notable)
Marlin	United States	Record low maximum temperature	17.2 C (63.0 F)	37 of 100 (Notable)
Seminole	United States	Record low maximum temperature	5.0 C (41.0 F)	37 of 100 (Notable)
Chilliwack	Canada	Record low minimum temperature	0.0 C (32.0 F)	36 of 100 (Notable)
St Andrews	Canada	Record low maximum temperature	4.4 C (39.9 F)	36 of 100 (Notable)
Smithfield	United States	Record low maximum temperature	14.4 C (57.9 F)	36 of 100 (Notable)
Lamesa 1 SSE	United States	Record low maximum temperature	5.6 C (42.1 F)	36 of 100 (Notable)
Lowell	United States	Record low maximum temperature	6.7 C (44.1 F)	35 of 100 (Notable)
Leitchfield 2 N	United States	Record low minimum temperature	-1.7 C (28.9 F)	34 of 100 (Routine)
Brockton	United States	Record low maximum temperature	6.1 C (43.0 F)	34 of 100 (Routine)
Fall River	United States	Record low maximum temperature	6.7 C (44.1 F)	34 of 100 (Routine)
Jal	United States	Record low maximum temperature	8.9 C (48.0 F)	34 of 100 (Routine)
Gettysburg	United States	Record low maximum temperature	11.1 C (52.0 F)	34 of 100 (Routine)
Georgetown 2 E	United States	Record low maximum temperature	17.2 C (63.0 F)	34 of 100 (Routine)
Buckhannon	United States	Record low minimum temperature	-5.0 C (23.0 F)	34 of 100 (Routine)
North Bay	Canada	Record low minimum temperature	-5.6 C (21.9 F)	33 of 100 (Routine)
Hudugur	India	Record daily precipitation	89.1 mm (3.5 in)	33 of 100 (Routine)
Florence	United States	Record low minimum temperature	-0.6 C (30.9 F)	33 of 100 (Routine)
Prescott 2 NNW	United States	Record low maximum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
New Bedford Coop	United States	Record low maximum temperature	7.2 C (45.0 F)	33 of 100 (Routine)
Hightstown 2 W	United States	Record low maximum temperature	8.9 C (48.0 F)	33 of 100 (Routine)
Ballinger 2 NW	United States	Record low maximum temperature	11.1 C (52.0 F)	33 of 100 (Routine)
Brownwood 2NE	United States	Record low maximum temperature	12.2 C (54.0 F)	33 of 100 (Routine)
Cream Hill	United States	Record low maximum temperature	7.8 C (46.0 F)	32 of 100 (Routine)
Hanover	United States	Record low maximum temperature	6.1 C (43.0 F)	32 of 100 (Routine)
Newport News Press Bld	United States	Record low maximum temperature	14.4 C (57.9 F)	32 of 100 (Routine)
Wytheville	United States	Record low minimum temperature	-3.9 C (25.0 F)	32 of 100 (Routine)
Harnosand	Sweden	Record high maximum temperature	16.0 C (60.8 F)	31 of 100 (Routine)
Bar Harbor 3 NW	United States	Record low maximum temperature	5.6 C (42.1 F)	31 of 100 (Routine)
Durham	United States	Record low maximum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Jornada Exp Range	United States	Record low maximum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Fayetteville (Pwc)	United States	Record low maximum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Raleigh State UNIV	United States	Record low maximum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Kaufman 3 SE	United States	Record low maximum temperature	15.0 C (59.0 F)	31 of 100 (Routine)
Marathon	United States	Record low maximum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Moorefield 1 SSE	United States	Record low maximum temperature	12.2 C (54.0 F)	31 of 100 (Routine)
Tarnaby	Sweden	Record high minimum temperature	7.0 C (44.6 F)	30 of 100 (Routine)
Mt Sterling	United States	Record low minimum temperature	-1.1 C (30.0 F)	30 of 100 (Routine)
Cloudcroft	United States	Record low maximum temperature	4.4 C (39.9 F)	30 of 100 (Routine)
Ephrata	United States	Record low maximum temperature	10.0 C (50.0 F)	30 of 100 (Routine)
Kingston	United States	Record low maximum temperature	9.4 C (48.9 F)	30 of 100 (Routine)
Coleman	United States	Record low maximum temperature	13.9 C (57.0 F)	30 of 100 (Routine)

Counts by Type and Timescale

815 records

Records set or tied on 17 October 1970 by type: Highest daily maximum 17, Lowest daily maximum 430, Highest daily minimum 25, Lowest daily minimum 257, Heaviest daily rainfall 53, Heaviest daily snowfall 30, Deepest snow cover 3.

Records on 17 October 1970 by type
Record type	Records
Highest daily maximum	17
Lowest daily maximum	430
Highest daily minimum	25
Lowest daily minimum	257
Heaviest daily rainfall	53
Heaviest daily snowfall	30
Deepest snow cover	3

Records on 17 October 1970 by timescale: all-time 0, monthly 13, daily 802.

How Much Records Were Beaten By

641 broken records

Margins by which the 641 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 160.0. Ties are not counted.

Top 20 by Significance

17 October 1970

Top 20 records on 17 October 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 October 1970	Harrington Harbour, CA	daily rain	55.1 mm (2.2 in)	30.2 mm (1.2 in)	51 years	54 of 100 (Notable)
17 October 1970	Skaneateles, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	51 years	52 of 100 (Notable)
17 October 1970	Windhoek, NA	monthly rain	39.0 mm (1.5 in)	13.0 mm (0.5 in)	45 years	51 of 100 (Notable)
17 October 1970	Ste Rose du Degelis, CA	daily snowfall	16.0 cm (6.3 in)	16.0 cm (6.3 in)	36 years	46 of 100 (Notable)
17 October 1970	Port Hastings, CA	daily rain	45.2 mm (1.8 in)	17.3 mm (0.7 in)	75 years	43 of 100 (Notable)
17 October 1970	Atlantic City Marina, US	daily low max	8.3 C (46.9 F)	3.4 C (6.1 F)	86 years	43 of 100 (Notable)
17 October 1970	Colorado City, US	daily low max	10.0 C (50.0 F)	8.3 C (14.9 F)	63 years	42 of 100 (Notable)
17 October 1970	Grindstone Island, CA	daily rain	36.3 mm (1.4 in)	23.3 mm (0.9 in)	11 years	41 of 100 (Notable)
17 October 1970	Causapscal, CA	daily snowfall	18.3 cm (7.2 in)	15.8 cm (6.2 in)	31 years	40 of 100 (Notable)
17 October 1970	Pearl, US	daily low max	7.2 C (45.0 F)	9.5 C (17.1 F)	53 years	40 of 100 (Notable)
17 October 1970	Taunton, US	daily low max	5.0 C (41.0 F)	5.6 C (10.1 F)	71 years	39 of 100 (Notable)
17 October 1970	Cortland, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	73 years	39 of 100 (Notable)
17 October 1970	Raleigh State UNIV, US	daily low min	0.0 C (32.0 F)	4.4 C (7.9 F)	76 years	39 of 100 (Notable)
17 October 1970	Ny City Cntrl Park, US	daily low max	8.3 C (46.9 F)	1.7 C (3.1 F)	86 years	39 of 100 (Notable)
17 October 1970	La Pocatiere Cda, CA	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	53 years	38 of 100 (Notable)
17 October 1970	Kuzhithurai, IN	daily rain	106.7 mm (4.2 in)	32.3 mm (1.3 in)	53 years	38 of 100 (Notable)
17 October 1970	Nashua 2 NNW, US	daily low max	6.1 C (43.0 F)	2.8 C (5.0 F)	83 years	38 of 100 (Notable)
17 October 1970	Sloan 3 S, US	daily low max	14.4 C (57.9 F)	3.4 C (6.1 F)	76 years	38 of 100 (Notable)
17 October 1970	Crosbyton, US	daily low max	5.0 C (41.0 F)	5.6 C (10.1 F)	74 years	38 of 100 (Notable)
17 October 1970	Marlin, US	daily low max	17.2 C (63.0 F)	5.0 C (9.0 F)	67 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

1793 to 1970

Records set or tied on this calendar date in each year from 1793 to 1970. 1970 had 815 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 1970-10-17: 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 20	618
20 to 40	16
40 to 60	2
60 to 80	2
80 to 100	0
100 to 120	0
120 to 140	0
140 to 160	3