Weather Records on 21 October 2017

750 weather records were set or tied worldwide on 21 October 2017. Highest significance: Manfred Downs Station, AU.

Key Facts for 21 October 2017

On 21 October 2017, 750 weather records were set or tied at long-record stations worldwide.
355 were record highs and 83 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 23 monthly and 725 daily.
Manfred Downs Station set a monthly record daily precipitation of 112.2 mm (4.4 in) on 21 October 2017.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 418 records.

Record Map

750 stations

750 station records on 21 October 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 October 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Manfred Downs Station	Australia	Record daily precipitation	112.2 mm (4.4 in)	86 of 100 (Exceptional)
Stanley	United States	Record daily snowfall	10.2 cm (4.0 in)	65 of 100 (Major)
Olympia AP	United States	Record daily precipitation	73.9 mm (2.9 in)	62 of 100 (Major)
Stampede Pass	United States	Record daily precipitation	109.5 mm (4.3 in)	62 of 100 (Major)
Stanley	United States	Record snow depth	10.2 cm (4.0 in)	61 of 100 (Major)
Portland Intl AP	United States	Record daily precipitation	54.1 mm (2.1 in)	61 of 100 (Major)
Corona Downs	Australia	Record daily precipitation	44.0 mm (1.7 in)	57 of 100 (Notable)
New Roads 5 NE	United States	Record daily precipitation	152.4 mm (6.0 in)	56 of 100 (Notable)
Lawrence	United States	Record daily precipitation	55.1 mm (2.2 in)	54 of 100 (Notable)
Vernonia #2	United States	Record daily precipitation	62.0 mm (2.4 in)	54 of 100 (Notable)
Trough	United States	Record daily precipitation	55.9 mm (2.2 in)	54 of 100 (Notable)
Gjerstad I Aust-Agder	Norway	Record daily precipitation	80.2 mm (3.2 in)	53 of 100 (Notable)
Potato Hill	United States	Record daily precipitation	71.1 mm (2.8 in)	53 of 100 (Notable)
White Pass E.S.	United States	Record daily precipitation	68.6 mm (2.7 in)	53 of 100 (Notable)
Sheep Canyon	United States	Record daily precipitation	142.2 mm (5.6 in)	53 of 100 (Notable)
Seine Creek	United States	Record daily precipitation	137.2 mm (5.4 in)	53 of 100 (Notable)
Park Creek Ridge	United States	Record daily precipitation	78.7 mm (3.1 in)	52 of 100 (Notable)
Spencer Meadow	United States	Record daily precipitation	106.7 mm (4.2 in)	52 of 100 (Notable)
Cloverdale	United States	Record daily precipitation	80.8 mm (3.2 in)	51 of 100 (Notable)
Aseral	Norway	Record daily precipitation	58.9 mm (2.3 in)	50 of 100 (Notable)
Blewett Pass	United States	Record daily precipitation	63.5 mm (2.5 in)	50 of 100 (Notable)
Red Hill	United States	Record daily precipitation	116.8 mm (4.6 in)	50 of 100 (Notable)
Crowfels Station	Australia	Record daily precipitation	56.0 mm (2.2 in)	49 of 100 (Notable)
Landsburg	United States	Record daily precipitation	51.3 mm (2.0 in)	49 of 100 (Notable)
Morse Lake	United States	Record daily precipitation	78.7 mm (3.1 in)	49 of 100 (Notable)
Greenpoint	United States	Record daily precipitation	94.0 mm (3.7 in)	49 of 100 (Notable)
Mud Ridge	United States	Record daily precipitation	78.7 mm (3.1 in)	49 of 100 (Notable)
Lyman Lake	United States	Record daily precipitation	68.6 mm (2.7 in)	48 of 100 (Notable)
Sasse Ridge	United States	Record daily precipitation	83.8 mm (3.3 in)	48 of 100 (Notable)
Moran 5WNW	United States	Record daily snowfall	16.5 cm (6.5 in)	47 of 100 (Notable)
June Lake	United States	Record daily precipitation	160.0 mm (6.3 in)	47 of 100 (Notable)
Mykland	Norway	Record daily precipitation	72.1 mm (2.8 in)	46 of 100 (Notable)
Nelaug	Norway	Record daily precipitation	84.7 mm (3.3 in)	45 of 100 (Notable)
Hayward Rs	United States	Record high minimum temperature	14.4 C (57.9 F)	45 of 100 (Notable)
Clear Lake	United States	Record daily precipitation	53.3 mm (2.1 in)	45 of 100 (Notable)
Osage	United States	Record high minimum temperature	16.1 C (61.0 F)	44 of 100 (Notable)
Cloquet	United States	Record high minimum temperature	13.9 C (57.0 F)	44 of 100 (Notable)
Mora	United States	Record high minimum temperature	15.6 C (60.1 F)	44 of 100 (Notable)
Decorah	United States	Record high minimum temperature	16.1 C (61.0 F)	42 of 100 (Notable)
Otis 2 NE	United States	Record daily precipitation	72.9 mm (2.9 in)	42 of 100 (Notable)
Daly Lake	United States	Record daily precipitation	78.7 mm (3.1 in)	42 of 100 (Notable)
Warroo Station	Australia	Record daily precipitation	43.0 mm (1.7 in)	41 of 100 (Notable)
Spirit Lake	United States	Record high minimum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Vermillion 2 SE	United States	Record high minimum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Brule Rs	United States	Record high minimum temperature	12.2 C (54.0 F)	41 of 100 (Notable)
Stampede Pass	United States	Record daily precipitation	106.7 mm (4.2 in)	41 of 100 (Notable)
Pigtail Peak	United States	Record daily precipitation	73.7 mm (2.9 in)	41 of 100 (Notable)
Green Hills	Australia	Record daily precipitation	28.4 mm (1.1 in)	40 of 100 (Notable)
Freystadt-Oberndorf	Germany	Record daily precipitation	26.1 mm (1.0 in)	40 of 100 (Notable)
Harrison	United States	Record high minimum temperature	18.3 C (64.9 F)	40 of 100 (Notable)
Rison	United States	Record high minimum temperature	16.7 C (62.1 F)	40 of 100 (Notable)
Arbuckle Mtn	United States	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Lone Pine	United States	Record daily precipitation	81.3 mm (3.2 in)	40 of 100 (Notable)
Hancock Houghton Co AP	United States	Record high minimum temperature	16.1 C (61.0 F)	40 of 100 (Notable)
Bogarella	Australia	Record daily precipitation	27.0 mm (1.1 in)	39 of 100 (Notable)
The Channon	Australia	Record daily precipitation	30.0 mm (1.2 in)	39 of 100 (Notable)
Weaverville	United States	Record low maximum temperature	10.0 C (50.0 F)	39 of 100 (Notable)
Hays 1 S	United States	Record high minimum temperature	14.4 C (57.9 F)	39 of 100 (Notable)
Naselle 2 ENE	United States	Record daily precipitation	130.8 mm (5.1 in)	39 of 100 (Notable)
Kansas City Intl AP	United States	Record daily precipitation	67.3 mm (2.6 in)	39 of 100 (Notable)

Counts by Type and Timescale

750 records

Records set or tied on 21 October 2017 by type: Highest daily maximum 119, Lowest daily maximum 71, Highest daily minimum 236, Lowest daily minimum 12, Heaviest daily rainfall 290, Heaviest daily snowfall 13, Deepest snow cover 9.

Records on 21 October 2017 by type
Record type	Records
Highest daily maximum	119
Lowest daily maximum	71
Highest daily minimum	236
Lowest daily minimum	12
Heaviest daily rainfall	290
Heaviest daily snowfall	13
Deepest snow cover	9

Records on 21 October 2017 by timescale: all-time 2, monthly 23, daily 725.

How Much Records Were Beaten By

605 broken records

Margins by which the 605 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 158.0. Ties are not counted.

Top 20 by Significance

21 October 2017

Top 20 records on 21 October 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 2017	Manfred Downs Station, AU	monthly rain	112.2 mm (4.4 in)	58.9 mm (2.3 in)	87 years	86 of 100 (Exceptional)
21 October 2017	Stanley, US	daily snowfall	10.2 cm (4.0 in)	9.4 cm (3.7 in)	96 years	65 of 100 (Major)
21 October 2017	Olympia AP, US	daily rain	73.9 mm (2.9 in)	43.2 mm (1.7 in)	51 years	62 of 100 (Major)
21 October 2017	Stampede Pass, US	daily rain	109.5 mm (4.3 in)	60.0 mm (2.4 in)	50 years	62 of 100 (Major)
21 October 2017	Stanley, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	96 years	61 of 100 (Major)
21 October 2017	Portland Intl AP, US	daily rain	54.1 mm (2.1 in)	26.2 mm (1.0 in)	66 years	61 of 100 (Major)
21 October 2017	Corona Downs, AU	daily rain	44.0 mm (1.7 in)	22.4 mm (0.9 in)	96 years	57 of 100 (Notable)
21 October 2017	New Roads 5 NE, US	daily rain	152.4 mm (6.0 in)	129.5 mm (5.1 in)	32 years	56 of 100 (Notable)
21 October 2017	Lawrence, US	daily rain	55.1 mm (2.2 in)	19.5 mm (0.8 in)	142 years	54 of 100 (Notable)
21 October 2017	Vernonia #2, US	daily rain	62.0 mm (2.4 in)	44.2 mm (1.7 in)	32 years	54 of 100 (Notable)
21 October 2017	Trough, US	daily rain	55.9 mm (2.2 in)	45.7 mm (1.8 in)	35 years	54 of 100 (Notable)
21 October 2017	Gjerstad I Aust-Agder, NO	daily rain	80.2 mm (3.2 in)	18.4 mm (0.7 in)	104 years	53 of 100 (Notable)
21 October 2017	Potato Hill, US	daily rain	71.1 mm (2.8 in)	50.8 mm (2.0 in)	35 years	53 of 100 (Notable)
21 October 2017	White Pass E.S., US	daily rain	68.6 mm (2.7 in)	43.2 mm (1.7 in)	34 years	53 of 100 (Notable)
21 October 2017	Sheep Canyon, US	daily rain	142.2 mm (5.6 in)	101.6 mm (4.0 in)	34 years	53 of 100 (Notable)
21 October 2017	Seine Creek, US	daily rain	137.2 mm (5.4 in)	88.9 mm (3.5 in)	35 years	53 of 100 (Notable)
21 October 2017	Park Creek Ridge, US	daily rain	78.7 mm (3.1 in)	55.8 mm (2.2 in)	35 years	52 of 100 (Notable)
21 October 2017	Spencer Meadow, US	daily rain	106.7 mm (4.2 in)	76.2 mm (3.0 in)	32 years	52 of 100 (Notable)
21 October 2017	Cloverdale, US	daily rain	80.8 mm (3.2 in)	51.6 mm (2.0 in)	20 years	51 of 100 (Notable)
21 October 2017	Aseral, NO	daily rain	58.9 mm (2.3 in)	12.9 mm (0.5 in)	104 years	50 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

1795 to 2017

Records set or tied on this calendar date in each year from 1795 to 2017. 2017 had 750 records.

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

Records on 10-21 in each year
Year	Records
1795	1
1802	2
1805	1
1808	1
1810	1
1834	1
1835	1
1840	1
1845	1
1847	1
1850	1
1851	2
1854	1
1859	1
1863	1
1864	1
1866	3
1867	1
1868	3
1869	2
1871	1
1872	1
1873	1
1874	1
1876	4
1877	2
1878	1
1880	3
1881	1
1883	1
1886	1
1888	2
1889	2
1890	3
1891	6
1892	6
1893	1
1894	1
1895	2
1896	5
1898	6
1899	3
1900	2
1901	9
1902	2
1903	3
1904	30
1905	15
1906	11
1907	35
1908	35
1909	19
1910	21
1911	10
1912	18
1913	59
1914	35
1915	43
1916	70
1917	208
1918	18
1919	102
1920	149
1921	58
1922	78
1923	81
1924	389
1925	150
1926	77
1927	187
1928	78
1929	200
1930	492
1931	217
1932	165
1933	733
1934	407
1935	707
1936	407
1937	132
1938	121
1939	491
1940	537
1941	644
1942	258
1943	421
1944	367
1945	538
1946	297
1947	977
1948	266
1949	1,015
1950	438
1951	382
1952	848
1953	1,579
1954	279
1955	481
1956	276
1957	511
1958	322
1959	410
1960	408
1961	553
1962	359
1963	725
1964	457
1965	465
1966	425
1967	472
1968	174
1969	881
1970	548
1971	498
1972	813
1973	464
1974	866
1975	509
1976	1,467
1977	451
1978	616
1979	1,958
1980	378
1981	667
1982	870
1983	786
1984	1,872
1985	776
1986	814
1987	852
1988	696
1989	1,668
1990	807
1991	877
1992	1,095
1993	845
1994	670
1995	1,120
1996	1,581
1997	915
1998	711
1999	688
2000	771
2001	610
2002	1,241
2003	2,066
2004	1,674
2005	949
2006	1,057
2007	916
2008	610
2009	713
2010	710
2011	662
2012	703
2013	440
2014	716
2015	493
2016	734
2017	750
2018	440
2019	757
2020	1,135
2021	574
2022	629
2023	890
2024	1,138
2025	364

Download the Data

Data for records on 2017-10-21: 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Margin	Records
0 to 20	519
20 to 40	40
40 to 60	28
60 to 80	7
80 to 100	4
100 to 120	3
120 to 140	3
140 to 160	1