Weather Records on 31 October 2021

469 weather records were set or tied worldwide on 31 October 2021. Highest significance: Alyeska, US.

Key Facts for 31 October 2021

On 31 October 2021, 469 weather records were set or tied at long-record stations worldwide.
215 were record highs and 58 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 11 monthly and 457 daily.
Alyeska set an all-time record daily precipitation of 242.1 mm (9.5 in) on 31 October 2021.
Across 163 earlier years (1805 to 2025) the same calendar date averaged 472 records.

Record Map

469 stations

469 station records on 31 October 2021 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 October 2021: highest significance records shown on the map
Station	Country	Type	Value	Significance
Alyeska	United States	Record daily precipitation	242.1 mm (9.5 in)	78 of 100 (Major)
Madrid - Retiro	Spain	Record daily precipitation	47.7 mm (1.9 in)	67 of 100 (Major)
Belfast	United States	Record daily precipitation	130.8 mm (5.1 in)	67 of 100 (Major)
Myroodah	Australia	Record daily precipitation	27.8 mm (1.1 in)	64 of 100 (Major)
Warren	United States	Record daily precipitation	45.7 mm (1.8 in)	64 of 100 (Major)
Surigao	Philippines	Record daily precipitation	320.8 mm (12.6 in)	62 of 100 (Major)
Lampang	Thailand	Record daily precipitation	63.0 mm (2.5 in)	61 of 100 (Major)
Guba	Azerbaijan	Record daily precipitation	99.3 mm (3.9 in)	59 of 100 (Notable)
Madrid/Getafe	Spain	Record daily precipitation	41.4 mm (1.6 in)	59 of 100 (Notable)
Salamanca Aeropuerto	Spain	Record daily precipitation	30.0 mm (1.2 in)	58 of 100 (Notable)
Salamanca Obs.	Spain	Record daily precipitation	33.5 mm (1.3 in)	58 of 100 (Notable)
Newburyport	United States	Record daily precipitation	87.9 mm (3.5 in)	54 of 100 (Notable)
Dannemora	United States	Record daily precipitation	42.4 mm (1.7 in)	54 of 100 (Notable)
Gardiner	United States	Record daily precipitation	74.9 mm (2.9 in)	52 of 100 (Notable)
Greenland	United States	Record daily precipitation	153.9 mm (6.1 in)	52 of 100 (Notable)
Mount Denison	Australia	Record daily precipitation	40.2 mm (1.6 in)	51 of 100 (Notable)
Elspeet	Netherlands	Record daily precipitation	35.3 mm (1.4 in)	51 of 100 (Notable)
Peru 2 WSW	United States	Record daily precipitation	45.0 mm (1.8 in)	51 of 100 (Notable)
Kedougou	Senegal	Record low minimum temperature	12.8 C (55.0 F)	50 of 100 (Notable)
Greenville Muni AP	United States	Record daily precipitation	52.3 mm (2.1 in)	50 of 100 (Notable)
Haverhill	United States	Record daily precipitation	69.9 mm (2.8 in)	49 of 100 (Notable)
High Mowthorpe	United Kingdom	Record daily precipitation	32.0 mm (1.3 in)	48 of 100 (Notable)
Kennebunkport	United States	Record daily precipitation	133.1 mm (5.2 in)	48 of 100 (Notable)
Madrid/Cuatrovientos	Spain	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Sanford 2 NNW	United States	Record daily precipitation	106.2 mm (4.2 in)	47 of 100 (Notable)
Bangor Intl AP	United States	Record daily precipitation	73.2 mm (2.9 in)	47 of 100 (Notable)
Oldebroek	Netherlands	Record daily precipitation	27.7 mm (1.1 in)	46 of 100 (Notable)
Elburg	Netherlands	Record daily precipitation	26.2 mm (1.0 in)	44 of 100 (Notable)
Newport	United States	Record daily precipitation	33.3 mm (1.3 in)	43 of 100 (Notable)
Saint Johnsbury	United States	Record daily precipitation	39.9 mm (1.6 in)	43 of 100 (Notable)
Berlin	United States	Record daily precipitation	50.8 mm (2.0 in)	42 of 100 (Notable)
Mt Washington	United States	Record daily precipitation	83.1 mm (3.3 in)	41 of 100 (Notable)
Waterville Trtmt Plt	United States	Record daily precipitation	61.2 mm (2.4 in)	40 of 100 (Notable)
Lakeport 2	United States	Record daily precipitation	55.9 mm (2.2 in)	40 of 100 (Notable)
Freiburg	Germany	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)
Otter Brook Lake	United States	Record daily precipitation	32.0 mm (1.3 in)	39 of 100 (Notable)
Nenana Muni AP	United States	Record high maximum temperature	11.1 C (52.0 F)	39 of 100 (Notable)
Lingling	China	Record daily precipitation	53.8 mm (2.1 in)	38 of 100 (Notable)
Ijsselmuiden	Netherlands	Record daily precipitation	29.5 mm (1.2 in)	38 of 100 (Notable)
Maliye_Karmakuly	Russia	Record high maximum temperature	7.1 C (44.8 F)	38 of 100 (Notable)
Durham	United States	Record daily precipitation	86.6 mm (3.4 in)	38 of 100 (Notable)
Newark	United States	Record daily precipitation	34.8 mm (1.4 in)	38 of 100 (Notable)
Lunteren	Netherlands	Record daily precipitation	34.5 mm (1.4 in)	37 of 100 (Notable)
Surigao	Philippines	Record low minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Corinna	United States	Record daily precipitation	64.3 mm (2.5 in)	37 of 100 (Notable)
Sarapul	Russia	Record high minimum temperature	6.3 C (43.3 F)	36 of 100 (Notable)
Karesuando	Sweden	Record snow depth	45.0 cm (17.7 in)	36 of 100 (Notable)
Franklin Falls Dam	United States	Record daily precipitation	57.9 mm (2.3 in)	36 of 100 (Notable)
Nenana Muni AP	United States	Record high minimum temperature	3.9 C (39.0 F)	36 of 100 (Notable)
Buenos Aires Observ	Argentina	Record high maximum temperature	31.0 C (87.8 F)	35 of 100 (Notable)
Albacete Los Llanos	Spain	Record high minimum temperature	14.8 C (58.6 F)	35 of 100 (Notable)
Newcastle	United States	Record daily precipitation	64.3 mm (2.5 in)	35 of 100 (Notable)
Middleton	United States	Record daily precipitation	63.0 mm (2.5 in)	34 of 100 (Routine)
Epping	United States	Record daily precipitation	63.0 mm (2.5 in)	34 of 100 (Routine)
Whitehall	United States	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Kamenskoe	Russia	Record low minimum temperature	-32.5 C (-26.5 F)	33 of 100 (Routine)
Elizabethtown	United States	Record daily precipitation	35.1 mm (1.4 in)	33 of 100 (Routine)
Main Bay	United States	Record daily precipitation	181.1 mm (7.1 in)	33 of 100 (Routine)
Mt. Alyeska	United States	Record daily precipitation	94.0 mm (3.7 in)	33 of 100 (Routine)
Cooper Lake	United States	Record daily precipitation	50.8 mm (2.0 in)	33 of 100 (Routine)

Counts by Type and Timescale

469 records

Records set or tied on 31 October 2021 by type: Highest daily maximum 76, Lowest daily maximum 16, Highest daily minimum 139, Lowest daily minimum 42, Heaviest daily rainfall 193, Heaviest daily snowfall 1, Deepest snow cover 2.

Records on 31 October 2021 by type
Record type	Records
Highest daily maximum	76
Lowest daily maximum	16
Highest daily minimum	139
Lowest daily minimum	42
Heaviest daily rainfall	193
Heaviest daily snowfall	1
Deepest snow cover	2

Records on 31 October 2021 by timescale: all-time 1, monthly 11, daily 457.

How Much Records Were Beaten By

408 broken records

Margins by which the 408 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 181.9. Ties are not counted.

Top 20 by Significance

31 October 2021

Top 20 records on 31 October 2021 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 October 2021	Alyeska, US	all-time rain	242.1 mm (9.5 in)	65.6 mm (2.6 in)	51 years	78 of 100 (Major)
31 October 2021	Madrid - Retiro, ES	daily rain	47.7 mm (1.9 in)	26.4 mm (1.0 in)	78 years	67 of 100 (Major)
31 October 2021	Belfast, US	daily rain	130.8 mm (5.1 in)	78.2 mm (3.1 in)	59 years	67 of 100 (Major)
31 October 2021	Myroodah, AU	daily rain	27.8 mm (1.1 in)	22.0 mm (0.9 in)	104 years	64 of 100 (Major)
31 October 2021	Warren, US	daily rain	45.7 mm (1.8 in)	20.8 mm (0.8 in)	102 years	64 of 100 (Major)
31 October 2021	Surigao, PH	monthly rain	320.8 mm (12.6 in)	181.9 mm (7.2 in)	23 years	62 of 100 (Major)
31 October 2021	Lampang, TH	daily rain	63.0 mm (2.5 in)	52.5 mm (2.1 in)	47 years	61 of 100 (Major)
31 October 2021	Guba, AZ	daily rain	99.3 mm (3.9 in)	87.9 mm (3.5 in)	36 years	59 of 100 (Notable)
31 October 2021	Madrid/Getafe, ES	daily rain	41.4 mm (1.6 in)	24.7 mm (1.0 in)	52 years	59 of 100 (Notable)
31 October 2021	Salamanca Aeropuerto, ES	daily rain	30.0 mm (1.2 in)	22.3 mm (0.9 in)	52 years	58 of 100 (Notable)
31 October 2021	Salamanca Obs., ES	daily rain	33.5 mm (1.3 in)	27.7 mm (1.1 in)	46 years	58 of 100 (Notable)
31 October 2021	Newburyport, US	daily rain	87.9 mm (3.5 in)	37.1 mm (1.5 in)	82 years	54 of 100 (Notable)
31 October 2021	Dannemora, US	daily rain	42.4 mm (1.7 in)	12.9 mm (0.5 in)	103 years	54 of 100 (Notable)
31 October 2021	Gardiner, US	daily rain	74.9 mm (2.9 in)	35.3 mm (1.4 in)	66 years	52 of 100 (Notable)
31 October 2021	Greenland, US	daily rain	153.9 mm (6.1 in)	134.6 mm (5.3 in)	28 years	52 of 100 (Notable)
31 October 2021	Mount Denison, AU	daily rain	40.2 mm (1.6 in)	21.1 mm (0.8 in)	55 years	51 of 100 (Notable)
31 October 2021	Elspeet, NL	daily rain	35.3 mm (1.4 in)	21.2 mm (0.8 in)	23 years	51 of 100 (Notable)
31 October 2021	Peru 2 WSW, US	daily rain	45.0 mm (1.8 in)	25.2 mm (1.0 in)	66 years	51 of 100 (Notable)
31 October 2021	Kedougou, SN	monthly low min	12.8 C (55.0 F)	4.5 C (8.1 F)	23 years	50 of 100 (Notable)
31 October 2021	Greenville Muni AP, US	daily rain	52.3 mm (2.1 in)	19.5 mm (0.8 in)	82 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

1805 to 2021

Records set or tied on this calendar date in each year from 1805 to 2021. 2021 had 469 records.

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

Records on 10-31 in each year
Year	Records
1805	1
1811	2
1828	1
1836	1
1838	1
1839	1
1841	1
1845	1
1847	2
1848	1
1852	2
1856	1
1865	1
1868	1
1869	3
1873	2
1875	2
1876	1
1877	1
1878	1
1879	1
1880	1
1881	6
1883	1
1884	3
1886	1
1887	2
1888	3
1889	5
1891	3
1892	4
1893	3
1894	5
1895	4
1896	10
1897	1
1898	5
1899	4
1900	5
1901	4
1902	5
1903	5
1904	7
1905	21
1906	38
1907	22
1908	13
1909	15
1910	18
1911	32
1912	14
1913	39
1914	33
1915	11
1916	72
1917	67
1918	72
1919	112
1920	63
1921	22
1922	72
1923	359
1924	244
1925	405
1926	153
1927	183
1928	120
1929	234
1930	240
1931	178
1932	260
1933	796
1934	410
1935	981
1936	307
1937	335
1938	399
1939	415
1940	248
1941	536
1942	578
1943	213
1944	611
1945	287
1946	530
1947	371
1948	695
1949	831
1950	1,237
1951	527
1952	393
1953	303
1954	460
1955	427
1956	1,086
1957	392
1958	314
1959	484
1960	296
1961	511
1962	344
1963	631
1964	538
1965	340
1966	630
1967	748
1968	605
1969	531
1970	412
1971	992
1972	1,234
1973	581
1974	1,192
1975	827
1976	655
1977	616
1978	538
1979	1,130
1980	657
1981	497
1982	560
1983	782
1984	1,054
1985	632
1986	396
1987	1,002
1988	1,058
1989	857
1990	990
1991	3,294
1992	1,324
1993	2,926
1994	1,004
1995	1,051
1996	1,074
1997	1,553
1998	1,410
1999	997
2000	1,114
2001	1,218
2002	1,613
2003	1,167
2004	870
2005	1,048
2006	842
2007	613
2008	1,256
2009	1,030
2010	931
2011	746
2012	884
2013	623
2014	547
2015	691
2016	1,012
2017	437
2018	414
2019	2,501
2020	542
2021	469
2022	497
2023	960
2024	1,133
2025	314

Download the Data

Data for records on 2021-10-31: 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	378
25 to 50	21
50 to 75	4
75 to 100	2
100 to 125	1
125 to 150	1
150 to 175	0
175 to 200	1