Weather Records on 17 October 1971

1,053 weather records were set or tied worldwide on 17 October 1971. Highest significance: Lisbon, US.

Key Facts for 17 October 1971

On 17 October 1971, 1,053 weather records were set or tied at long-record stations worldwide.
220 were record highs and 455 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 43 monthly and 1,010 daily.
Lisbon set a daily record precipitation of 47.5 mm (1.9 in) on 17 October 1971.
Across 162 earlier years (1793 to 2025) the same calendar date averaged 436 records.

Record Map

1,053 stations

1,053 station records on 17 October 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 October 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lisbon	United States	Record daily precipitation	47.5 mm (1.9 in)	64 of 100 (Major)
Ada	United States	Record daily precipitation	67.3 mm (2.6 in)	58 of 100 (Notable)
Austin #2	United States	Record snow depth	43.2 cm (17.0 in)	58 of 100 (Notable)
Anadia	Brazil	Record daily precipitation	41.4 mm (1.6 in)	57 of 100 (Notable)
Mahnomen	United States	Record daily precipitation	67.1 mm (2.6 in)	57 of 100 (Notable)
Wilburton 9 ENE	United States	Record daily precipitation	163.8 mm (6.4 in)	55 of 100 (Notable)
Lakeside Rs	United States	Record daily snowfall	15.2 cm (6.0 in)	53 of 100 (Notable)
George W 2 SSW	United States	Record daily precipitation	147.3 mm (5.8 in)	52 of 100 (Notable)
Hawthorne AP	United States	Record low maximum temperature	0.6 C (33.1 F)	51 of 100 (Notable)
Conceicao da Barra	Brazil	Record daily precipitation	116.0 mm (4.6 in)	50 of 100 (Notable)
Baudette	United States	Record daily precipitation	38.1 mm (1.5 in)	50 of 100 (Notable)
Gonvick 2 W	United States	Record daily precipitation	54.6 mm (2.1 in)	50 of 100 (Notable)
Ninette	Canada	Record daily precipitation	30.7 mm (1.2 in)	49 of 100 (Notable)
Oakes	United States	Record daily precipitation	36.8 mm (1.4 in)	49 of 100 (Notable)
Ft Yukon	United States	Record daily snowfall	17.8 cm (7.0 in)	49 of 100 (Notable)
Tambe (Itambe)	Brazil	Record daily precipitation	35.8 mm (1.4 in)	47 of 100 (Notable)
Red Lake Indian Agcy	United States	Record daily precipitation	43.2 mm (1.7 in)	47 of 100 (Notable)
Escada	Brazil	Record daily precipitation	120.0 mm (4.7 in)	46 of 100 (Notable)
Ft Valley	United States	Record snow depth	22.9 cm (9.0 in)	46 of 100 (Notable)
Des Arc	United States	Record daily precipitation	70.1 mm (2.8 in)	45 of 100 (Notable)
Cedaredge	United States	Record daily precipitation	30.0 mm (1.2 in)	45 of 100 (Notable)
Ames	United States	Record daily precipitation	49.0 mm (1.9 in)	44 of 100 (Notable)
Smithville	United States	Record daily precipitation	79.5 mm (3.1 in)	44 of 100 (Notable)
Maceio (Aeroporto)	Brazil	Record daily precipitation	40.0 mm (1.6 in)	43 of 100 (Notable)
Jaransk	Russia	Record daily precipitation	41.7 mm (1.6 in)	43 of 100 (Notable)
Minden	United States	Record snow depth	12.7 cm (5.0 in)	43 of 100 (Notable)
Oenpelli	Australia	Record daily precipitation	67.3 mm (2.6 in)	42 of 100 (Notable)
Mina	United States	Record low maximum temperature	2.2 C (36.0 F)	42 of 100 (Notable)
Collbran	United States	Record daily precipitation	34.8 mm (1.4 in)	41 of 100 (Notable)
Big Falls	United States	Record daily precipitation	50.8 mm (2.0 in)	41 of 100 (Notable)
Vancouver 4 NNE	United States	Record low minimum temperature	-3.3 C (26.1 F)	41 of 100 (Notable)
Winton Post Office	Australia	Record daily precipitation	25.4 mm (1.0 in)	40 of 100 (Notable)
Boca	United States	Record daily snowfall	7.6 cm (3.0 in)	40 of 100 (Notable)
Plevna	United States	Record daily precipitation	27.9 mm (1.1 in)	40 of 100 (Notable)
Northdale	United States	Record daily precipitation	55.9 mm (2.2 in)	39 of 100 (Notable)
Detroit Lakes 1 NNE	United States	Record daily precipitation	25.9 mm (1.0 in)	39 of 100 (Notable)
Natchez	United States	Record daily precipitation	92.2 mm (3.6 in)	39 of 100 (Notable)
Waynesboro 2 W	United States	Record high minimum temperature	24.4 C (75.9 F)	39 of 100 (Notable)
Niznij Novgorod	Russia	Record daily precipitation	26.9 mm (1.1 in)	38 of 100 (Notable)
Whiteriver 1 SW	United States	Record daily snowfall	5.1 cm (2.0 in)	38 of 100 (Notable)
Muttaburra	Australia	Record daily precipitation	46.2 mm (1.8 in)	37 of 100 (Notable)
Sugartown	United States	Record daily precipitation	62.7 mm (2.5 in)	37 of 100 (Notable)
Austin #2	United States	Record low minimum temperature	-10.6 C (12.9 F)	37 of 100 (Notable)
Monticello 2E	United States	Record daily precipitation	38.1 mm (1.5 in)	37 of 100 (Notable)
Vilnius	Lithuania	Record low minimum temperature	-5.6 C (21.9 F)	36 of 100 (Notable)
Williams	United States	Record daily snowfall	11.4 cm (4.5 in)	36 of 100 (Notable)
Ft Bidwell	United States	Record low maximum temperature	5.6 C (42.1 F)	36 of 100 (Notable)
Dyer 5S	United States	Record low maximum temperature	7.2 C (45.0 F)	36 of 100 (Notable)
McGill	United States	Record low maximum temperature	2.8 C (37.0 F)	36 of 100 (Notable)
Amenia	United States	Record daily precipitation	41.9 mm (1.6 in)	36 of 100 (Notable)
Goliad	United States	Record daily precipitation	64.0 mm (2.5 in)	36 of 100 (Notable)
Port Lavaca 2	United States	Record daily precipitation	82.6 mm (3.3 in)	36 of 100 (Notable)
Ellensburg	United States	Record low minimum temperature	-8.3 C (17.1 F)	36 of 100 (Notable)
Lagoa da Canoa	Brazil	Record daily precipitation	41.0 mm (1.6 in)	35 of 100 (Notable)
Kakabeka Falls	Canada	Record daily precipitation	32.8 mm (1.3 in)	35 of 100 (Notable)
Coalcoman (Smn)	Mexico	Record low maximum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
N Fk Rs	United States	Record low maximum temperature	7.2 C (45.0 F)	35 of 100 (Notable)
Munday	United States	Record daily precipitation	62.2 mm (2.4 in)	35 of 100 (Notable)
Cameron Falls	Canada	Record daily precipitation	27.2 mm (1.1 in)	34 of 100 (Routine)
Cuyamaca	United States	Record daily precipitation	38.4 mm (1.5 in)	34 of 100 (Routine)

Counts by Type and Timescale

1,053 records

Records set or tied on 17 October 1971 by type: Highest daily maximum 23, Lowest daily maximum 255, Highest daily minimum 197, Lowest daily minimum 200, Heaviest daily rainfall 332, Heaviest daily snowfall 31, Deepest snow cover 15.

Records on 17 October 1971 by type
Record type	Records
Highest daily maximum	23
Lowest daily maximum	255
Highest daily minimum	197
Lowest daily minimum	200
Heaviest daily rainfall	332
Heaviest daily snowfall	31
Deepest snow cover	15

Records on 17 October 1971 by timescale: all-time 0, monthly 43, daily 1,010.

How Much Records Were Beaten By

881 broken records

Margins by which the 881 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 229.0. Ties are not counted.

Top 20 by Significance

17 October 1971

Top 20 records on 17 October 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 October 1971	Lisbon, US	daily rain	47.5 mm (1.9 in)	41.4 mm (1.6 in)	65 years	64 of 100 (Major)
17 October 1971	Ada, US	monthly rain	67.3 mm (2.6 in)	19.0 mm (0.7 in)	45 years	58 of 100 (Notable)
17 October 1971	Austin #2, US	monthly snow depth	43.2 cm (17.0 in)	22.9 cm (9.0 in)	0 years	58 of 100 (Notable)
17 October 1971	Anadia, BR	daily rain	41.4 mm (1.6 in)	32.3 mm (1.3 in)	41 years	57 of 100 (Notable)
17 October 1971	Mahnomen, US	monthly rain	67.1 mm (2.6 in)	23.9 mm (0.9 in)	36 years	57 of 100 (Notable)
17 October 1971	Wilburton 9 ENE, US	monthly rain	163.8 mm (6.4 in)	69.3 mm (2.7 in)	2 years	55 of 100 (Notable)
17 October 1971	Lakeside Rs, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	58 years	53 of 100 (Notable)
17 October 1971	George W 2 SSW, US	monthly rain	147.3 mm (5.8 in)	44.4 mm (1.7 in)	45 years	52 of 100 (Notable)
17 October 1971	Hawthorne AP, US	monthly low max	0.6 C (33.1 F)	5.0 C (9.0 F)	81 years	51 of 100 (Notable)
17 October 1971	Conceicao da Barra, BR	daily rain	116.0 mm (4.6 in)	70.1 mm (2.8 in)	22 years	50 of 100 (Notable)
17 October 1971	Baudette, US	daily rain	38.1 mm (1.5 in)	21.3 mm (0.8 in)	53 years	50 of 100 (Notable)
17 October 1971	Gonvick 2 W, US	daily rain	54.6 mm (2.1 in)	42.7 mm (1.7 in)	17 years	50 of 100 (Notable)
17 October 1971	Ninette, CA	daily rain	30.7 mm (1.2 in)	15.2 mm (0.6 in)	53 years	49 of 100 (Notable)
17 October 1971	Oakes, US	daily rain	36.8 mm (1.4 in)	31.0 mm (1.2 in)	17 years	49 of 100 (Notable)
17 October 1971	Ft Yukon, US	daily snowfall	17.8 cm (7.0 in)	10.2 cm (4.0 in)	34 years	49 of 100 (Notable)
17 October 1971	Tambe (Itambe), BR	daily rain	35.8 mm (1.4 in)	27.0 mm (1.1 in)	4 years	47 of 100 (Notable)
17 October 1971	Red Lake Indian Agcy, US	daily rain	43.2 mm (1.7 in)	35.1 mm (1.4 in)	2 years	47 of 100 (Notable)
17 October 1971	Escada, BR	monthly rain	120.0 mm (4.7 in)	16.2 mm (0.6 in)	31 years	46 of 100 (Notable)
17 October 1971	Ft Valley, US	daily snow depth	22.9 cm (9.0 in)	22.9 cm (9.0 in)	61 years	46 of 100 (Notable)
17 October 1971	Des Arc, US	daily rain	70.1 mm (2.8 in)	56.6 mm (2.2 in)	22 years	45 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 1971

Records set or tied on this calendar date in each year from 1793 to 1971. 1971 had 1,053 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 1971-10-17: 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 50	858
50 to 100	16
100 to 150	4
150 to 200	1
200 to 250	2