Weather Records on 20 October 2009

786 weather records were set or tied worldwide on 20 October 2009. Highest significance: Moccasin Exp STN, US.

Key Facts for 20 October 2009

On 20 October 2009, 786 weather records were set or tied at long-record stations worldwide.
373 were record highs and 239 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 22 monthly and 763 daily.
Moccasin Exp STN set a daily record precipitation of 28.2 mm (1.1 in) on 20 October 2009.
Across 160 earlier years (1806 to 2025) the same calendar date averaged 455 records.

Record Map

786 stations

786 station records on 20 October 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 October 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Moccasin Exp STN	United States	Record daily precipitation	28.2 mm (1.1 in)	76 of 100 (Major)
Valentine	United States	Record daily precipitation	36.8 mm (1.4 in)	70 of 100 (Major)
Cuthbert	United States	Record low minimum temperature	-3.9 C (25.0 F)	54 of 100 (Notable)
Los Otates V	Mexico	Record daily precipitation	84.8 mm (3.3 in)	51 of 100 (Notable)
Huahuapan	Mexico	Record daily precipitation	67.8 mm (2.7 in)	44 of 100 (Notable)
San Luis Acatlan	Mexico	Record low maximum temperature	22.8 C (73.0 F)	44 of 100 (Notable)
Freiburg	Germany	Record low minimum temperature	-4.1 C (24.6 F)	42 of 100 (Notable)
Zuerich/Fluntern	Switzerland	Record low minimum temperature	-1.7 C (28.9 F)	42 of 100 (Notable)
North Lakhimpur	India	Record daily precipitation	26.9 mm (1.1 in)	41 of 100 (Notable)
Ai-Petri	Ukraine	Record high minimum temperature	14.3 C (57.7 F)	41 of 100 (Notable)
Louisville 1 E	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Brockway 3 WSW	United States	Record daily precipitation	31.8 mm (1.3 in)	41 of 100 (Notable)
Siwa	Egypt	Record high minimum temperature	22.0 C (71.6 F)	40 of 100 (Notable)
Borinquen AP	Puerto Rico [United States]	Record high minimum temperature	26.1 C (79.0 F)	40 of 100 (Notable)
Har Kenaan	Israel	Record high minimum temperature	24.5 C (76.1 F)	38 of 100 (Notable)
Talpa de Allende	Mexico	Record daily precipitation	39.4 mm (1.6 in)	38 of 100 (Notable)
San Miguel Chimalapa	Mexico	Record low minimum temperature	1.7 C (35.1 F)	38 of 100 (Notable)
Wetumpka	United States	Record low maximum temperature	17.2 C (63.0 F)	38 of 100 (Notable)
Ohotsk	Russia	Record high minimum temperature	2.8 C (37.0 F)	37 of 100 (Notable)
Potrerillos	Mexico	Record daily precipitation	200.4 mm (7.9 in)	36 of 100 (Notable)
Ft Grant	United States	Record high maximum temperature	33.3 C (91.9 F)	36 of 100 (Notable)
Placerville	United States	Record low maximum temperature	12.8 C (55.0 F)	36 of 100 (Notable)
Wiggins	United States	Record low minimum temperature	-3.9 C (25.0 F)	36 of 100 (Notable)
Elida	United States	Record daily precipitation	47.2 mm (1.9 in)	36 of 100 (Notable)
Aktobe	Kazakhstan	Record high maximum temperature	24.5 C (76.1 F)	35 of 100 (Notable)
Hool	Mexico	Record low maximum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Ixpalino	Mexico	Record daily precipitation	114.8 mm (4.5 in)	35 of 100 (Notable)
Sanalona II	Mexico	Record low maximum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Kislovodsk	Russia	Record high maximum temperature	26.3 C (79.3 F)	35 of 100 (Notable)
Huesca	Spain	Record daily precipitation	26.6 mm (1.0 in)	35 of 100 (Notable)
Lund	United States	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Arroyo Frio	Mexico	Record low maximum temperature	23.3 C (73.9 F)	34 of 100 (Routine)
Ai-Petri	Ukraine	Record high maximum temperature	21.4 C (70.5 F)	34 of 100 (Routine)
McGill	United States	Record daily precipitation	25.4 mm (1.0 in)	34 of 100 (Routine)
Huntingdon	United States	Record low minimum temperature	-7.2 C (19.0 F)	34 of 100 (Routine)
Dimas	Mexico	Record daily precipitation	179.8 mm (7.1 in)	33 of 100 (Routine)
Oberstdorf	Germany	Record low minimum temperature	-7.1 C (19.2 F)	32 of 100 (Routine)
Har Kenaan	Israel	Record high maximum temperature	32.2 C (90.0 F)	32 of 100 (Routine)
Bezenchuk	Russia	Record high maximum temperature	20.2 C (68.4 F)	32 of 100 (Routine)
El-Ton	Russia	Record high maximum temperature	23.7 C (74.7 F)	32 of 100 (Routine)
Orenburg	Russia	Record high maximum temperature	22.7 C (72.9 F)	32 of 100 (Routine)
Sotchi	Russia	Record high minimum temperature	19.1 C (66.4 F)	32 of 100 (Routine)
Hubbard	United States	Record daily precipitation	55.9 mm (2.2 in)	32 of 100 (Routine)
Artesia 6S	United States	Record high maximum temperature	32.8 C (91.0 F)	32 of 100 (Routine)
Goodwell Rsch STN	United States	Record high maximum temperature	33.3 C (91.9 F)	32 of 100 (Routine)
Kosrae	Federated States of Micronesia	Record high maximum temperature	35.0 C (95.0 F)	31 of 100 (Routine)
Kutaisi	Georgia	Record high minimum temperature	21.0 C (69.8 F)	31 of 100 (Routine)
Mittenwald-Buckelwiesen	Germany	Record low minimum temperature	-6.2 C (20.8 F)	31 of 100 (Routine)
Tihosuco	Mexico	Record low minimum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Kurgan	Russia	Record high minimum temperature	7.4 C (45.3 F)	31 of 100 (Routine)
Armavir	Russia	Record high maximum temperature	28.6 C (83.5 F)	31 of 100 (Routine)
Bartlett 1W	United States	Record daily precipitation	28.2 mm (1.1 in)	31 of 100 (Routine)
Muleshoe #1	United States	Record high maximum temperature	32.8 C (91.0 F)	31 of 100 (Routine)
Plainview	United States	Record high maximum temperature	32.2 C (90.0 F)	31 of 100 (Routine)
La Presumida	Mexico	Record low minimum temperature	11.7 C (53.1 F)	30 of 100 (Routine)
Las Tortugas	Mexico	Record daily precipitation	91.9 mm (3.6 in)	30 of 100 (Routine)
Kurgan	Russia	Record high maximum temperature	22.0 C (71.6 F)	30 of 100 (Routine)
Hawaii Vol Np HQ 54	United States	Record high minimum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Uralsk	Kazakhstan	Record high maximum temperature	23.3 C (73.9 F)	29 of 100 (Routine)
Pichucalco (Smn)	Mexico	Record low maximum temperature	22.8 C (73.0 F)	29 of 100 (Routine)

Counts by Type and Timescale

786 records

Records set or tied on 20 October 2009 by type: Highest daily maximum 193, Lowest daily maximum 99, Highest daily minimum 180, Lowest daily minimum 140, Heaviest daily rainfall 164, Heaviest daily snowfall 4, Deepest snow cover 6.

Records on 20 October 2009 by type
Record type	Records
Highest daily maximum	193
Lowest daily maximum	99
Highest daily minimum	180
Lowest daily minimum	140
Heaviest daily rainfall	164
Heaviest daily snowfall	4
Deepest snow cover	6

Records on 20 October 2009 by timescale: all-time 1, monthly 22, daily 763.

How Much Records Were Beaten By

626 broken records

Margins by which the 626 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 220.0. Ties are not counted.

Top 20 by Significance

20 October 2009

Top 20 records on 20 October 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 October 2009	Moccasin Exp STN, US	daily rain	28.2 mm (1.1 in)	18.3 mm (0.7 in)	87 years	76 of 100 (Major)
20 October 2009	Valentine, US	daily rain	36.8 mm (1.4 in)	21.8 mm (0.9 in)	76 years	70 of 100 (Major)
20 October 2009	Cuthbert, US	monthly low min	-3.9 C (25.0 F)	2.8 C (5.0 F)	98 years	54 of 100 (Notable)
20 October 2009	Los Otates V, MX	daily rain	84.8 mm (3.3 in)	79.7 mm (3.1 in)	32 years	51 of 100 (Notable)
20 October 2009	Huahuapan, MX	monthly rain	67.8 mm (2.7 in)	19.0 mm (0.7 in)	40 years	44 of 100 (Notable)
20 October 2009	San Luis Acatlan, MX	daily low max	22.8 C (73.0 F)	6.1 C (11.0 F)	44 years	44 of 100 (Notable)
20 October 2009	Freiburg, DE	daily low min	-4.1 C (24.6 F)	0.9 C (1.6 F)	127 years	42 of 100 (Notable)
20 October 2009	Zuerich/Fluntern, CH	daily low min	-1.7 C (28.9 F)	0.7 C (1.3 F)	106 years	42 of 100 (Notable)
20 October 2009	North Lakhimpur, IN	daily rain	26.9 mm (1.1 in)	6.1 mm (0.24 in)	95 years	41 of 100 (Notable)
20 October 2009	Ai-Petri, UA	daily high min	14.3 C (57.7 F)	2.1 C (3.8 F)	91 years	41 of 100 (Notable)
20 October 2009	Louisville 1 E, US	daily low max	17.8 C (64.0 F)	0.5 C (0.9 F)	111 years	41 of 100 (Notable)
20 October 2009	Brockway 3 WSW, US	daily rain	31.8 mm (1.3 in)	20.4 mm (0.8 in)	15 years	41 of 100 (Notable)
20 October 2009	Siwa, EG	daily high min	22.0 C (71.6 F)	1.0 C (1.8 F)	95 years	40 of 100 (Notable)
20 October 2009	Borinquen AP, PR	daily high min	26.1 C (79.0 F)	1.7 C (3.1 F)	60 years	40 of 100 (Notable)
20 October 2009	Har Kenaan, IL	daily high min	24.5 C (76.1 F)	3.4 C (6.1 F)	70 years	38 of 100 (Notable)
20 October 2009	Talpa de Allende, MX	daily rain	39.4 mm (1.6 in)	21.1 mm (0.8 in)	48 years	38 of 100 (Notable)
20 October 2009	San Miguel Chimalapa, MX	daily low min	1.7 C (35.1 F)	8.3 C (14.9 F)	31 years	38 of 100 (Notable)
20 October 2009	Wetumpka, US	daily low max	17.2 C (63.0 F)	1.7 C (3.1 F)	86 years	38 of 100 (Notable)
20 October 2009	Ohotsk, RU	daily high min	2.8 C (37.0 F)	0.3 C (0.5 F)	91 years	37 of 100 (Notable)
20 October 2009	Potrerillos, MX	all-time rain	200.4 mm (7.9 in)	6.1 mm (0.24 in)	35 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

1806 to 2009

Records set or tied on this calendar date in each year from 1806 to 2009. 2009 had 786 records.

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

Records on 10-20 in each year
Year	Records
1806	1
1835	1
1844	1
1846	1
1847	2
1851	1
1852	1
1858	1
1863	2
1864	2
1866	3
1867	1
1868	2
1872	2
1874	2
1875	3
1876	2
1877	1
1878	1
1880	3
1881	2
1884	1
1885	1
1886	1
1887	1
1888	6
1891	4
1892	4
1893	1
1894	3
1895	4
1896	9
1897	2
1898	7
1899	1
1900	8
1901	7
1902	5
1903	9
1904	13
1905	22
1906	28
1907	32
1908	26
1909	17
1910	31
1911	16
1912	6
1913	38
1914	16
1915	20
1916	72
1917	201
1918	34
1919	19
1920	81
1921	68
1922	83
1923	96
1924	182
1925	247
1926	147
1927	283
1928	92
1929	129
1930	672
1931	125
1932	331
1933	675
1934	422
1935	390
1936	370
1937	189
1938	231
1939	367
1940	757
1941	459
1942	152
1943	501
1944	288
1945	363
1946	310
1947	1,494
1948	320
1949	1,084
1950	619
1951	279
1952	520
1953	1,057
1954	262
1955	529
1956	283
1957	440
1958	461
1959	451
1960	671
1961	479
1962	733
1963	765
1964	598
1965	340
1966	857
1967	511
1968	244
1969	607
1970	710
1971	606
1972	1,724
1973	878
1974	1,122
1975	587
1976	1,304
1977	467
1978	508
1979	1,647
1980	350
1981	1,083
1982	1,191
1983	944
1984	1,562
1985	835
1986	823
1987	590
1988	737
1989	2,092
1990	609
1991	971
1992	1,174
1993	1,238
1994	650
1995	703
1996	1,417
1997	949
1998	683
1999	603
2000	737
2001	589
2002	985
2003	1,761
2004	1,861
2005	1,092
2006	1,170
2007	923
2008	477
2009	786
2010	539
2011	785
2012	945
2013	592
2014	851
2015	523
2016	947
2017	602
2018	394
2019	744
2020	1,010
2021	900
2022	834
2023	1,468
2024	707
2025	326

Download the Data

Data for records on 2009-10-20: 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	617
50 to 100	6
100 to 150	1
150 to 200	1
200 to 250	1