Weather Records on 17 October 2009

1,606 weather records were set or tied worldwide on 17 October 2009. Highest significance: Teziutlan, MX.

Key Facts for 17 October 2009

On 17 October 2009, 1,606 weather records were set or tied at long-record stations worldwide.
422 were record highs and 948 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 29 monthly and 1,577 daily.
Teziutlan set a daily record precipitation of 183.9 mm (7.2 in) on 17 October 2009.
Across 162 earlier years (1793 to 2025) the same calendar date averaged 432 records.

Record Map

1,606 stations

1,606 station records on 17 October 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 October 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Teziutlan	Mexico	Record daily precipitation	183.9 mm (7.2 in)	70 of 100 (Major)
Coupeville 1 S	United States	Record daily precipitation	41.4 mm (1.6 in)	70 of 100 (Major)
Martinez de la Torre (Dge)	Mexico	Record daily precipitation	240.0 mm (9.4 in)	60 of 100 (Major)
Tlanchinol (Smn)	Mexico	Record daily precipitation	188.0 mm (7.4 in)	57 of 100 (Notable)
Cuetzalan del Progreso	Mexico	Record daily precipitation	233.9 mm (9.2 in)	56 of 100 (Notable)
Las Animas	Mexico	Record daily precipitation	42.2 mm (1.7 in)	56 of 100 (Notable)
Zacatlan	Mexico	Record daily precipitation	86.9 mm (3.4 in)	55 of 100 (Notable)
Huauchinango	Mexico	Record daily precipitation	100.6 mm (4.0 in)	55 of 100 (Notable)
Requetemu	Mexico	Record daily precipitation	157.0 mm (6.2 in)	55 of 100 (Notable)
Quimixtlan	Mexico	Record daily precipitation	47.8 mm (1.9 in)	53 of 100 (Notable)
Rinconada	Mexico	Record daily precipitation	104.9 mm (4.1 in)	53 of 100 (Notable)
Altotonga	Mexico	Record daily precipitation	206.8 mm (8.1 in)	51 of 100 (Notable)
El Carrizal	Mexico	Record daily precipitation	78.5 mm (3.1 in)	51 of 100 (Notable)
Anacortes	United States	Record daily precipitation	38.4 mm (1.5 in)	51 of 100 (Notable)
W Chester 2 NW	United States	Record low maximum temperature	5.0 C (41.0 F)	50 of 100 (Notable)
Purcellville	United States	Record low maximum temperature	5.6 C (42.1 F)	50 of 100 (Notable)
Whidbey Island NAS	United States	Record daily precipitation	25.9 mm (1.0 in)	50 of 100 (Notable)
Joloapan (Cfe)	Mexico	Record daily precipitation	174.0 mm (6.9 in)	49 of 100 (Notable)
Toms River	United States	Record low maximum temperature	9.4 C (48.9 F)	48 of 100 (Notable)
Addison	United States	Record low maximum temperature	2.2 C (36.0 F)	48 of 100 (Notable)
Elmira	United States	Record low maximum temperature	2.8 C (37.0 F)	48 of 100 (Notable)
Xilitla	Mexico	Record daily precipitation	182.9 mm (7.2 in)	47 of 100 (Notable)
Talladega	United States	Record low maximum temperature	12.8 C (55.0 F)	47 of 100 (Notable)
Everett	United States	Record daily precipitation	38.9 mm (1.5 in)	47 of 100 (Notable)
Santa Maria Chilchotla	Mexico	Record daily precipitation	229.9 mm (9.1 in)	46 of 100 (Notable)
Ixtlan de Juarez	Mexico	Record daily precipitation	65.3 mm (2.6 in)	46 of 100 (Notable)
Santa Maria Jacatepec	Mexico	Record daily precipitation	235.0 mm (9.3 in)	46 of 100 (Notable)
Alcomunga	Mexico	Record daily precipitation	149.9 mm (5.9 in)	46 of 100 (Notable)
Actopan	Mexico	Record daily precipitation	74.7 mm (2.9 in)	46 of 100 (Notable)
El Raudal	Mexico	Record daily precipitation	141.5 mm (5.6 in)	46 of 100 (Notable)
Merced	United States	Record high minimum temperature	16.1 C (61.0 F)	46 of 100 (Notable)
Papantla	Mexico	Record daily precipitation	104.6 mm (4.1 in)	45 of 100 (Notable)
Louisville	United States	Record low maximum temperature	12.2 C (54.0 F)	45 of 100 (Notable)
Freehold-Marlboro	United States	Record low maximum temperature	8.9 C (48.0 F)	45 of 100 (Notable)
Liberty 1 NE	United States	Record low maximum temperature	3.9 C (39.0 F)	45 of 100 (Notable)
Huntingdon	United States	Record low maximum temperature	3.3 C (37.9 F)	45 of 100 (Notable)
Santiago Choapan	Mexico	Record daily precipitation	108.0 mm (4.3 in)	44 of 100 (Notable)
El Diamante	Mexico	Record daily precipitation	87.1 mm (3.4 in)	44 of 100 (Notable)
Sihuapan	Mexico	Record daily precipitation	187.7 mm (7.4 in)	44 of 100 (Notable)
Clanton	United States	Record low maximum temperature	12.8 C (55.0 F)	44 of 100 (Notable)
Dover	United States	Record low maximum temperature	8.9 C (48.0 F)	44 of 100 (Notable)
Sedro-Woolley	United States	Record daily precipitation	66.3 mm (2.6 in)	44 of 100 (Notable)
San Sebastian Tlacotepec de D	Mexico	Record daily precipitation	111.8 mm (4.4 in)	43 of 100 (Notable)
Loma Fina	Mexico	Record daily precipitation	59.9 mm (2.4 in)	43 of 100 (Notable)
Manlio Fabio Altamiramo	Mexico	Record daily precipitation	79.8 mm (3.1 in)	43 of 100 (Notable)
Nashville 1 E	United States	Record low maximum temperature	7.8 C (46.0 F)	43 of 100 (Notable)
Covington 8 WNW	United States	Record low maximum temperature	17.8 C (64.0 F)	43 of 100 (Notable)
Potosi 4 SW	United States	Record low maximum temperature	7.2 C (45.0 F)	43 of 100 (Notable)
Capuluaque (Cfe)	Mexico	Record daily precipitation	88.1 mm (3.5 in)	42 of 100 (Notable)
Windsor	United States	Record low maximum temperature	7.8 C (46.0 F)	42 of 100 (Notable)
Booneville	United States	Record low maximum temperature	12.2 C (54.0 F)	42 of 100 (Notable)
Waverly	United States	Record low maximum temperature	5.6 C (42.1 F)	42 of 100 (Notable)
Wellsboro 4 SW	United States	Record snow depth	10.2 cm (4.0 in)	42 of 100 (Notable)
Donnybrook	Australia	Record high maximum temperature	35.3 C (95.5 F)	41 of 100 (Notable)
Ixtepeji	Mexico	Record daily precipitation	30.0 mm (1.2 in)	41 of 100 (Notable)
Papaloapan	Mexico	Record daily precipitation	96.8 mm (3.8 in)	41 of 100 (Notable)
Ixhuatlan del Cafe	Mexico	Record daily precipitation	65.8 mm (2.6 in)	41 of 100 (Notable)
Misantla	Mexico	Record daily precipitation	186.9 mm (7.4 in)	41 of 100 (Notable)
Tres Zapotes	Mexico	Record daily precipitation	147.8 mm (5.8 in)	41 of 100 (Notable)
Moultrie 2 ESE	United States	Record low maximum temperature	14.4 C (57.9 F)	41 of 100 (Notable)

Counts by Type and Timescale

1,606 records

Records set or tied on 17 October 2009 by type: Highest daily maximum 215, Lowest daily maximum 836, Highest daily minimum 207, Lowest daily minimum 112, Heaviest daily rainfall 201, Heaviest daily snowfall 13, Deepest snow cover 22.

Records on 17 October 2009 by type
Record type	Records
Highest daily maximum	215
Lowest daily maximum	836
Highest daily minimum	207
Lowest daily minimum	112
Heaviest daily rainfall	201
Heaviest daily snowfall	13
Deepest snow cover	22

Records on 17 October 2009 by timescale: all-time 0, monthly 29, daily 1,577.

How Much Records Were Beaten By

1,291 broken records

Margins by which the 1,291 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 180.6. Ties are not counted.

Top 20 by Significance

17 October 2009

Top 20 records on 17 October 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 October 2009	Teziutlan, MX	daily rain	183.9 mm (7.2 in)	126.2 mm (5.0 in)	74 years	70 of 100 (Major)
17 October 2009	Coupeville 1 S, US	monthly rain	41.4 mm (1.6 in)	11.9 mm (0.5 in)	82 years	70 of 100 (Major)
17 October 2009	Martinez de la Torre (Dge), MX	daily rain	240.0 mm (9.4 in)	180.6 mm (7.1 in)	52 years	60 of 100 (Major)
17 October 2009	Tlanchinol (Smn), MX	daily rain	188.0 mm (7.4 in)	106.7 mm (4.2 in)	60 years	57 of 100 (Notable)
17 October 2009	Cuetzalan del Progreso, MX	daily rain	233.9 mm (9.2 in)	123.9 mm (4.9 in)	74 years	56 of 100 (Notable)
17 October 2009	Las Animas, MX	daily rain	42.2 mm (1.7 in)	36.4 mm (1.4 in)	51 years	56 of 100 (Notable)
17 October 2009	Zacatlan, MX	daily rain	86.9 mm (3.4 in)	61.2 mm (2.4 in)	34 years	55 of 100 (Notable)
17 October 2009	Huauchinango, MX	daily rain	100.6 mm (4.0 in)	54.1 mm (2.1 in)	80 years	55 of 100 (Notable)
17 October 2009	Requetemu, MX	daily rain	157.0 mm (6.2 in)	128.6 mm (5.1 in)	34 years	55 of 100 (Notable)
17 October 2009	Quimixtlan, MX	daily rain	47.8 mm (1.9 in)	32.3 mm (1.3 in)	32 years	53 of 100 (Notable)
17 October 2009	Rinconada, MX	daily rain	104.9 mm (4.1 in)	90.9 mm (3.6 in)	19 years	53 of 100 (Notable)
17 October 2009	Altotonga, MX	monthly rain	206.8 mm (8.1 in)	61.5 mm (2.4 in)	2 years	51 of 100 (Notable)
17 October 2009	El Carrizal, MX	daily rain	78.5 mm (3.1 in)	71.1 mm (2.8 in)	26 years	51 of 100 (Notable)
17 October 2009	Anacortes, US	daily rain	38.4 mm (1.5 in)	11.0 mm (0.4 in)	79 years	51 of 100 (Notable)
17 October 2009	W Chester 2 NW, US	daily low max	5.0 C (41.0 F)	5.0 C (9.0 F)	113 years	50 of 100 (Notable)
17 October 2009	Purcellville, US	daily low max	5.6 C (42.1 F)	5.5 C (9.9 F)	108 years	50 of 100 (Notable)
17 October 2009	Whidbey Island NAS, US	daily rain	25.9 mm (1.0 in)	13.5 mm (0.5 in)	52 years	50 of 100 (Notable)
17 October 2009	Joloapan (Cfe), MX	daily rain	174.0 mm (6.9 in)	126.2 mm (5.0 in)	34 years	49 of 100 (Notable)
17 October 2009	Toms River, US	daily low max	9.4 C (48.9 F)	3.9 C (7.0 F)	110 years	48 of 100 (Notable)
17 October 2009	Addison, US	daily low max	2.2 C (36.0 F)	5.0 C (9.0 F)	107 years	48 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 2009

Records set or tied on this calendar date in each year from 1793 to 2009. 2009 had 1,606 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 2009-10-17: 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 25	1,198
25 to 50	43
50 to 75	20
75 to 100	15
100 to 125	7
125 to 150	5
150 to 175	2
175 to 200	1