Weather Records on 21 October 2015

493 weather records were set or tied worldwide on 21 October 2015. Highest significance: Ovruch, UA.

Key Facts for 21 October 2015

On 21 October 2015, 493 weather records were set or tied at long-record stations worldwide.
284 were record highs and 53 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 9 monthly and 483 daily.
Ovruch set a daily record precipitation of 35.1 mm (1.4 in) on 21 October 2015.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 419 records.

Record Map

493 stations

493 station records on 21 October 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 October 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ovruch	Ukraine	Record daily precipitation	35.1 mm (1.4 in)	58 of 100 (Notable)
Las Palmas de Gran Canaria/Gan	Spain	Record daily precipitation	61.0 mm (2.4 in)	53 of 100 (Notable)
Dilia	United States	Record daily precipitation	58.4 mm (2.3 in)	51 of 100 (Notable)
Zhitckovichi	Belarus	Record daily precipitation	30.0 mm (1.2 in)	48 of 100 (Notable)
Duchesne	United States	Record high minimum temperature	7.8 C (46.0 F)	46 of 100 (Notable)
Iowa City	United States	Record daily precipitation	45.2 mm (1.8 in)	45 of 100 (Notable)
Santa Fe Co Muni AP	United States	Record daily precipitation	39.4 mm (1.6 in)	45 of 100 (Notable)
Hugoton	United States	Record daily precipitation	59.9 mm (2.4 in)	43 of 100 (Notable)
Raton Muni Crews Fld AP	United States	Record daily precipitation	41.1 mm (1.6 in)	43 of 100 (Notable)
Odesa	Ukraine	Record daily precipitation	27.2 mm (1.1 in)	41 of 100 (Notable)
Orland	United States	Record high minimum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Chama	United States	Record daily precipitation	35.3 mm (1.4 in)	41 of 100 (Notable)
San Marcos	United States	Record high maximum temperature	36.1 C (97.0 F)	41 of 100 (Notable)
Tobolsk	Russia	Record low maximum temperature	-7.3 C (18.9 F)	40 of 100 (Notable)
Akjoujt	Mauritania	Record low maximum temperature	30.0 C (86.0 F)	39 of 100 (Notable)
Beloit	United States	Record high minimum temperature	15.6 C (60.1 F)	39 of 100 (Notable)
Boys Rch	United States	Record daily precipitation	123.4 mm (4.9 in)	38 of 100 (Notable)
Villanueva	United States	Record daily precipitation	31.8 mm (1.3 in)	37 of 100 (Notable)
Boulder	United States	Record daily precipitation	26.2 mm (1.0 in)	36 of 100 (Notable)
Jerome	United States	Record high minimum temperature	8.9 C (48.0 F)	36 of 100 (Notable)
Greeley	United States	Record high maximum temperature	28.9 C (84.0 F)	36 of 100 (Notable)
Winters	United States	Record high minimum temperature	19.4 C (66.9 F)	35 of 100 (Notable)
Bailey	United States	Record high minimum temperature	3.3 C (37.9 F)	35 of 100 (Notable)
Mozyr	Belarus	Record daily precipitation	27.9 mm (1.1 in)	34 of 100 (Routine)
Ft Morgan	United States	Record high minimum temperature	8.3 C (46.9 F)	34 of 100 (Routine)
Aztec Ruins Nm	United States	Record high minimum temperature	8.3 C (46.9 F)	34 of 100 (Routine)
Hereford	United States	Record high minimum temperature	12.2 C (54.0 F)	34 of 100 (Routine)
Lookout Mountain	United States	Record daily precipitation	25.4 mm (1.0 in)	34 of 100 (Routine)
Clovis 13 N	United States	Record daily precipitation	75.7 mm (3.0 in)	32 of 100 (Routine)
Silverton	United States	Record daily precipitation	40.6 mm (1.6 in)	32 of 100 (Routine)
Red River Pass #2	United States	Record daily precipitation	25.4 mm (1.0 in)	32 of 100 (Routine)
Myton	United States	Record high minimum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Copeland Lake	United States	Record daily precipitation	27.9 mm (1.1 in)	31 of 100 (Routine)
Slutsk	Belarus	Record daily precipitation	38.1 mm (1.5 in)	30 of 100 (Routine)
Nyngan Airport	Australia	Record high minimum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Essendon Airport	Australia	Record high minimum temperature	17.0 C (62.6 F)	29 of 100 (Routine)
Kurgan	Russia	Record low minimum temperature	-13.9 C (7.0 F)	29 of 100 (Routine)
Gallegos Peak	United States	Record daily precipitation	45.7 mm (1.8 in)	29 of 100 (Routine)
Laverton Raaf	Australia	Record high minimum temperature	16.8 C (62.2 F)	28 of 100 (Routine)
Majuro Wbas AP	Marshall Islands	Record low maximum temperature	27.5 C (81.5 F)	28 of 100 (Routine)
Troitsk	Russia	Record low maximum temperature	-3.4 C (25.9 F)	28 of 100 (Routine)
Trinidad	United States	Record daily precipitation	44.7 mm (1.8 in)	28 of 100 (Routine)
Lincoln 1 SE	United States	Record high minimum temperature	17.8 C (64.0 F)	28 of 100 (Routine)
Ness City	United States	Record high minimum temperature	13.3 C (55.9 F)	28 of 100 (Routine)
Sidney Muni AP	United States	Record high minimum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Roosevelt Roads	Puerto Rico [United States]	Record high maximum temperature	32.8 C (91.0 F)	27 of 100 (Routine)
Coal Creek Canyon	United States	Record daily precipitation	28.2 mm (1.1 in)	27 of 100 (Routine)
Cedar Bluff Dam	United States	Record high minimum temperature	14.4 C (57.9 F)	27 of 100 (Routine)
Paakea 350	United States	Record daily precipitation	109.2 mm (4.3 in)	27 of 100 (Routine)
Quemazon	United States	Record daily precipitation	33.0 mm (1.3 in)	27 of 100 (Routine)
Verkhneuralsk	Russia	Record low maximum temperature	-2.7 C (27.1 F)	26 of 100 (Routine)
Ellsworth	United States	Record high minimum temperature	16.7 C (62.1 F)	26 of 100 (Routine)
Garden City Exp STN	United States	Record high minimum temperature	13.9 C (57.0 F)	26 of 100 (Routine)
Gatesville	United States	Record high minimum temperature	26.1 C (79.0 F)	26 of 100 (Routine)
Hobart Muni AP	United States	Record high minimum temperature	17.8 C (64.0 F)	26 of 100 (Routine)
Sydney Airport AMO	Australia	Record high minimum temperature	19.0 C (66.2 F)	25 of 100 (Routine)
Cobija	Bolivia	Record high minimum temperature	25.0 C (77.0 F)	25 of 100 (Routine)
Indore	India	Record high minimum temperature	22.0 C (71.6 F)	25 of 100 (Routine)
Magueyes Is	Puerto Rico [United States]	Record high minimum temperature	26.1 C (79.0 F)	25 of 100 (Routine)
Ziguinchor	Senegal	Record low minimum temperature	17.0 C (62.6 F)	25 of 100 (Routine)

Counts by Type and Timescale

493 records

Records set or tied on 21 October 2015 by type: Highest daily maximum 68, Lowest daily maximum 31, Highest daily minimum 216, Lowest daily minimum 22, Heaviest daily rainfall 156.

Records on 21 October 2015 by type
Record type	Records
Highest daily maximum	68
Lowest daily maximum	31
Highest daily minimum	216
Lowest daily minimum	22
Heaviest daily rainfall	156
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 October 2015 by timescale: all-time 1, monthly 9, daily 483.

How Much Records Were Beaten By

401 broken records

Margins by which the 401 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.0. Ties are not counted.

Top 20 by Significance

21 October 2015

Top 20 records on 21 October 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 2015	Ovruch, UA	daily rain	35.1 mm (1.4 in)	22.9 mm (0.9 in)	34 years	58 of 100 (Notable)
21 October 2015	Las Palmas de Gran Canaria/Gan, ES	daily rain	61.0 mm (2.4 in)	60.0 mm (2.4 in)	30 years	53 of 100 (Notable)
21 October 2015	Dilia, US	daily rain	58.4 mm (2.3 in)	39.3 mm (1.5 in)	30 years	51 of 100 (Notable)
21 October 2015	Zhitckovichi, BY	daily rain	30.0 mm (1.2 in)	11.1 mm (0.4 in)	64 years	48 of 100 (Notable)
21 October 2015	Duchesne, US	daily high min	7.8 C (46.0 F)	2.8 C (5.0 F)	101 years	46 of 100 (Notable)
21 October 2015	Iowa City, US	daily rain	45.2 mm (1.8 in)	18.0 mm (0.7 in)	65 years	45 of 100 (Notable)
21 October 2015	Santa Fe Co Muni AP, US	monthly rain	39.4 mm (1.6 in)	4.9 mm (0.19 in)	71 years	45 of 100 (Notable)
21 October 2015	Hugoton, US	daily rain	59.9 mm (2.4 in)	18.0 mm (0.7 in)	61 years	43 of 100 (Notable)
21 October 2015	Raton Muni Crews Fld AP, US	daily rain	41.1 mm (1.6 in)	28.4 mm (1.1 in)	4 years	43 of 100 (Notable)
21 October 2015	Odesa, UA	daily rain	27.2 mm (1.1 in)	18.8 mm (0.7 in)	16 years	41 of 100 (Notable)
21 October 2015	Orland, US	daily high min	17.8 C (64.0 F)	0.6 C (1.1 F)	101 years	41 of 100 (Notable)
21 October 2015	Chama, US	daily rain	35.3 mm (1.4 in)	17.0 mm (0.7 in)	36 years	41 of 100 (Notable)
21 October 2015	San Marcos, US	daily high max	36.1 C (97.0 F)	1.7 C (3.1 F)	93 years	41 of 100 (Notable)
21 October 2015	Tobolsk, RU	daily low max	-7.3 C (18.9 F)	0.2 C (0.4 F)	100 years	40 of 100 (Notable)
21 October 2015	Akjoujt, MR	daily low max	30.0 C (86.0 F)	3.8 C (6.8 F)	66 years	39 of 100 (Notable)
21 October 2015	Beloit, US	daily high min	15.6 C (60.1 F)	0.6 C (1.1 F)	94 years	39 of 100 (Notable)
21 October 2015	Boys Rch, US	all-time rain	123.4 mm (4.9 in)	9.1 mm (0.36 in)	25 years	38 of 100 (Notable)
21 October 2015	Villanueva, US	daily rain	31.8 mm (1.3 in)	12.7 mm (0.5 in)	57 years	37 of 100 (Notable)
21 October 2015	Boulder, US	daily rain	26.2 mm (1.0 in)	6.4 mm (0.25 in)	64 years	36 of 100 (Notable)
21 October 2015	Jerome, US	daily high min	8.9 C (48.0 F)	1.1 C (2.0 F)	80 years	36 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 2015

Records set or tied on this calendar date in each year from 1795 to 2015. 2015 had 493 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 2015-10-21: 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 10	369
10 to 20	25
20 to 30	3
30 to 40	2
40 to 50	0
50 to 60	0
60 to 70	2