Weather Records on 17 October 2020

889 weather records were set or tied worldwide on 17 October 2020. Highest significance: Custer, US.

Key Facts for 17 October 2020

On 17 October 2020, 889 weather records were set or tied at long-record stations worldwide.
389 were record highs and 195 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 882 daily.
Custer set a daily record snow depth of 17.8 cm (7.0 in) on 17 October 2020.
Across 162 earlier years (1793 to 2025) the same calendar date averaged 437 records.

Record Map

889 stations

889 station records on 17 October 2020 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 October 2020: highest significance records shown on the map
Station	Country	Type	Value	Significance
Custer	United States	Record snow depth	17.8 cm (7.0 in)	76 of 100 (Major)
Ft Benton	United States	Record daily snowfall	11.2 cm (4.4 in)	64 of 100 (Major)
Choteau	United States	Record daily snowfall	19.1 cm (7.5 in)	60 of 100 (Major)
Medford	United States	Record daily snowfall	5.1 cm (2.0 in)	59 of 100 (Notable)
Conrad	United States	Record snow depth	10.2 cm (4.0 in)	55 of 100 (Notable)
N Fk Elk Creek	United States	Record daily precipitation	33.0 mm (1.3 in)	55 of 100 (Notable)
Lubrecht Flume	United States	Record daily precipitation	27.9 mm (1.1 in)	55 of 100 (Notable)
Wallace	United States	Record daily precipitation	35.6 mm (1.4 in)	54 of 100 (Notable)
Ft Benton	United States	Record snow depth	10.2 cm (4.0 in)	54 of 100 (Notable)
Purdum	United States	Record daily snowfall	8.9 cm (3.5 in)	52 of 100 (Notable)
Helena AP ASOS	United States	Record daily snowfall	16.8 cm (6.6 in)	52 of 100 (Notable)
Sun Rvr 4 S	United States	Record daily snowfall	8.9 cm (3.5 in)	51 of 100 (Notable)
Grand Rapids Forestry Lab	United States	Record daily snowfall	7.1 cm (2.8 in)	50 of 100 (Notable)
Rocker Peak	United States	Record daily precipitation	25.4 mm (1.0 in)	48 of 100 (Notable)
Brimson 2S	United States	Record daily snowfall	7.6 cm (3.0 in)	47 of 100 (Notable)
Purdum	United States	Record snow depth	10.2 cm (4.0 in)	47 of 100 (Notable)
Manila	United States	Record high minimum temperature	11.1 C (52.0 F)	47 of 100 (Notable)
Big Timber	United States	Record snow depth	10.2 cm (4.0 in)	46 of 100 (Notable)
Melville 4 W	United States	Record daily snowfall	20.6 cm (8.1 in)	46 of 100 (Notable)
First Connecticut Lake	United States	Record daily snowfall	12.7 cm (5.0 in)	46 of 100 (Notable)
Jefferson	United States	Record snow depth	10.2 cm (4.0 in)	46 of 100 (Notable)
Mukdahan	Thailand	Record daily precipitation	75.2 mm (3.0 in)	45 of 100 (Notable)
Jackman	United States	Record daily precipitation	42.2 mm (1.7 in)	45 of 100 (Notable)
Adel	United States	Record low maximum temperature	-3.9 C (25.0 F)	45 of 100 (Notable)
Bynum 4 SSE	United States	Record daily snowfall	9.4 cm (3.7 in)	45 of 100 (Notable)
Trubcevsk	Russia	Record daily precipitation	27.9 mm (1.1 in)	42 of 100 (Notable)
Orland	United States	Record high minimum temperature	21.1 C (70.0 F)	42 of 100 (Notable)
Choteau	United States	Record snow depth	20.3 cm (8.0 in)	42 of 100 (Notable)
Great Falls AP	United States	Record daily snowfall	10.7 cm (4.2 in)	42 of 100 (Notable)
Napa State Hospital	United States	Record high maximum temperature	35.6 C (96.1 F)	41 of 100 (Notable)
San Jose	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Casey	United States	Record low minimum temperature	-1.7 C (28.9 F)	41 of 100 (Notable)
Cle Elum	United States	Record high minimum temperature	8.9 C (48.0 F)	41 of 100 (Notable)
Dayton	United States	Record snow depth	22.9 cm (9.0 in)	41 of 100 (Notable)
Evanston 1 E	United States	Record high minimum temperature	5.6 C (42.1 F)	41 of 100 (Notable)
Pendleton	United States	Record high minimum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Eastman 1 W	United States	Record high minimum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Weston 1 E	United States	Record daily snowfall	7.6 cm (3.0 in)	40 of 100 (Notable)
Dupuyer Creek	United States	Record daily precipitation	27.9 mm (1.1 in)	40 of 100 (Notable)
Billings Intl AP	United States	Record daily snowfall	13.2 cm (5.2 in)	40 of 100 (Notable)
Port Blair	India	Record daily precipitation	43.9 mm (1.7 in)	39 of 100 (Notable)
Kiev	Ukraine	Record daily precipitation	42.9 mm (1.7 in)	39 of 100 (Notable)
Hardin	United States	Record daily snowfall	7.6 cm (3.0 in)	39 of 100 (Notable)
Roebling	United States	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Saint Johnsbury	United States	Record daily precipitation	37.8 mm (1.5 in)	39 of 100 (Notable)
Juncos 1 SE	Puerto Rico [United States]	Record daily precipitation	57.2 mm (2.3 in)	38 of 100 (Notable)
First Connecticut Lake	United States	Record snow depth	12.7 cm (5.0 in)	38 of 100 (Notable)
Shell	United States	Record daily snowfall	7.1 cm (2.8 in)	38 of 100 (Notable)
Graton	United States	Record high maximum temperature	37.2 C (99.0 F)	37 of 100 (Notable)
Colebrook 3SW	United States	Record daily snowfall	6.6 cm (2.6 in)	37 of 100 (Notable)
Jefferson	United States	Record daily snowfall	9.9 cm (3.9 in)	37 of 100 (Notable)
Bay City Wtr Wks	United States	Record low maximum temperature	18.9 C (66.0 F)	37 of 100 (Notable)
Torrevieja	Spain	Record low minimum temperature	9.9 C (49.8 F)	36 of 100 (Notable)
Sucker Creek	United States	Record daily precipitation	27.9 mm (1.1 in)	35 of 100 (Notable)
Baker City AP	United States	Record high minimum temperature	8.9 C (48.0 F)	35 of 100 (Notable)
Greenfield	United States	Record low minimum temperature	-6.7 C (19.9 F)	34 of 100 (Routine)
Boulder	United States	Record low maximum temperature	-2.2 C (28.0 F)	34 of 100 (Routine)
Ellensburg Bowers Fld	United States	Record high minimum temperature	9.4 C (48.9 F)	34 of 100 (Routine)
Pearce - Sunsites	United States	Record high maximum temperature	32.8 C (91.0 F)	33 of 100 (Routine)
Tombstone	United States	Record high maximum temperature	34.4 C (93.9 F)	33 of 100 (Routine)

Counts by Type and Timescale

889 records

Records set or tied on 17 October 2020 by type: Highest daily maximum 172, Lowest daily maximum 97, Highest daily minimum 217, Lowest daily minimum 98, Heaviest daily rainfall 161, Heaviest daily snowfall 81, Deepest snow cover 63.

Records on 17 October 2020 by type
Record type	Records
Highest daily maximum	172
Lowest daily maximum	97
Highest daily minimum	217
Lowest daily minimum	98
Heaviest daily rainfall	161
Heaviest daily snowfall	81
Deepest snow cover	63

Records on 17 October 2020 by timescale: all-time 0, monthly 7, daily 882.

How Much Records Were Beaten By

717 broken records

Margins by which the 717 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 206.0. Ties are not counted.

Top 20 by Significance

17 October 2020

Top 20 records on 17 October 2020 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 October 2020	Custer, US	daily snow depth	17.8 cm (7.0 in)	17.8 cm (7.0 in)	94 years	76 of 100 (Major)
17 October 2020	Ft Benton, US	daily snowfall	11.2 cm (4.4 in)	11.2 cm (4.4 in)	120 years	64 of 100 (Major)
17 October 2020	Choteau, US	daily snowfall	19.1 cm (7.5 in)	11.5 cm (4.5 in)	90 years	60 of 100 (Major)
17 October 2020	Medford, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	125 years	59 of 100 (Notable)
17 October 2020	Conrad, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	109 years	55 of 100 (Notable)
17 October 2020	N Fk Elk Creek, US	daily rain	33.0 mm (1.3 in)	22.8 mm (0.9 in)	38 years	55 of 100 (Notable)
17 October 2020	Lubrecht Flume, US	daily rain	27.9 mm (1.1 in)	20.3 mm (0.8 in)	38 years	55 of 100 (Notable)
17 October 2020	Wallace, US	daily rain	35.6 mm (1.4 in)	19.1 mm (0.8 in)	73 years	54 of 100 (Notable)
17 October 2020	Ft Benton, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	72 years	54 of 100 (Notable)
17 October 2020	Purdum, US	daily snowfall	8.9 cm (3.5 in)	8.9 cm (3.5 in)	116 years	52 of 100 (Notable)
17 October 2020	Helena AP ASOS, US	daily snowfall	16.8 cm (6.6 in)	14.3 cm (5.6 in)	14 years	52 of 100 (Notable)
17 October 2020	Sun Rvr 4 S, US	daily snowfall	8.9 cm (3.5 in)	7.6 cm (3.0 in)	71 years	51 of 100 (Notable)
17 October 2020	Grand Rapids Forestry Lab, US	daily snowfall	7.1 cm (2.8 in)	7.1 cm (2.8 in)	72 years	50 of 100 (Notable)
17 October 2020	Rocker Peak, US	daily rain	25.4 mm (1.0 in)	15.2 mm (0.6 in)	40 years	48 of 100 (Notable)
17 October 2020	Brimson 2S, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	72 years	47 of 100 (Notable)
17 October 2020	Purdum, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	72 years	47 of 100 (Notable)
17 October 2020	Manila, US	daily high min	11.1 C (52.0 F)	3.3 C (5.9 F)	105 years	47 of 100 (Notable)
17 October 2020	Big Timber, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	81 years	46 of 100 (Notable)
17 October 2020	Melville 4 W, US	daily snowfall	20.6 cm (8.1 in)	20.6 cm (8.1 in)	60 years	46 of 100 (Notable)
17 October 2020	First Connecticut Lake, US	daily snowfall	12.7 cm (5.0 in)	11.4 cm (4.5 in)	25 years	46 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 2020

Records set or tied on this calendar date in each year from 1793 to 2020. 2020 had 889 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 2020-10-17: 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	667
50 to 100	36
100 to 150	10
150 to 200	2
200 to 250	2