Weather Records on 23 October 2009

838 weather records were set or tied worldwide on 23 October 2009. Highest significance: Rochester Intl AP, US.

Key Facts for 23 October 2009

On 23 October 2009, 838 weather records were set or tied at long-record stations worldwide.
228 were record highs and 166 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 824 daily.
Rochester Intl AP set a daily record snowfall of 10.7 cm (4.2 in) on 23 October 2009.
Across 160 earlier years (1795 to 2025) the same calendar date averaged 460 records.

Record Map

838 stations

838 station records on 23 October 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 23 October 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rochester Intl AP	United States	Record daily snowfall	10.7 cm (4.2 in)	65 of 100 (Major)
Morris 1NW	United States	Record daily precipitation	67.3 mm (2.6 in)	59 of 100 (Notable)
Logan 1 WNW	United States	Record daily precipitation	47.5 mm (1.9 in)	57 of 100 (Notable)
Don Muang	Thailand	Record daily precipitation	97.3 mm (3.8 in)	56 of 100 (Notable)
Clinton 1SSW	United States	Record daily precipitation	74.9 mm (2.9 in)	55 of 100 (Notable)
Lowell Wwtp	United States	Record daily precipitation	61.0 mm (2.4 in)	55 of 100 (Notable)
Hosston	United States	Record daily precipitation	93.5 mm (3.7 in)	53 of 100 (Notable)
Elgin	United States	Record daily snowfall	5.1 cm (2.0 in)	52 of 100 (Notable)
Osceola	United States	Record daily snowfall	6.4 cm (2.5 in)	52 of 100 (Notable)
Zaragoza	Mexico	Record daily precipitation	30.0 mm (1.2 in)	51 of 100 (Notable)
Hardy	United States	Record daily precipitation	60.5 mm (2.4 in)	51 of 100 (Notable)
Plain Dealing	United States	Record daily precipitation	80.3 mm (3.2 in)	51 of 100 (Notable)
Ft Kent	United States	Record daily snowfall	10.2 cm (4.0 in)	51 of 100 (Notable)
W Pt	United States	Record daily snowfall	5.8 cm (2.3 in)	51 of 100 (Notable)
Arkadelphia 2 N	United States	Record daily precipitation	78.0 mm (3.1 in)	50 of 100 (Notable)
Conway	United States	Record daily precipitation	72.4 mm (2.9 in)	50 of 100 (Notable)
Makaweli 965	United States	Record high minimum temperature	24.4 C (75.9 F)	50 of 100 (Notable)
Carlinville	United States	Record daily precipitation	60.5 mm (2.4 in)	49 of 100 (Notable)
Fairbury Wwtp	United States	Record daily precipitation	70.6 mm (2.8 in)	49 of 100 (Notable)
Kankakee Wwtp	United States	Record daily precipitation	63.5 mm (2.5 in)	49 of 100 (Notable)
Normal 4NE	United States	Record daily precipitation	74.2 mm (2.9 in)	49 of 100 (Notable)
Santa Maria di Leuc	Italy	Record daily precipitation	68.1 mm (2.7 in)	48 of 100 (Notable)
Joliet Brandon Road Lock/Dam	United States	Record daily precipitation	66.0 mm (2.6 in)	48 of 100 (Notable)
Marengo	United States	Record daily precipitation	44.2 mm (1.7 in)	48 of 100 (Notable)
Piper City	United States	Record daily precipitation	61.5 mm (2.4 in)	48 of 100 (Notable)
St Charles Elm Pt	United States	Record daily precipitation	69.1 mm (2.7 in)	48 of 100 (Notable)
Peotone	United States	Record daily precipitation	74.9 mm (2.9 in)	47 of 100 (Notable)
Marble Hill	United States	Record daily precipitation	65.3 mm (2.6 in)	47 of 100 (Notable)
Armadillo de Los Infante	Mexico	Record daily precipitation	47.0 mm (1.9 in)	46 of 100 (Notable)
Edwardsville 2 W	United States	Record daily precipitation	59.7 mm (2.4 in)	46 of 100 (Notable)
Mt Pulaski	United States	Record daily precipitation	57.7 mm (2.3 in)	46 of 100 (Notable)
Ottawa 4SW	United States	Record daily precipitation	53.6 mm (2.1 in)	46 of 100 (Notable)
Park Forest Water	United States	Record daily precipitation	71.4 mm (2.8 in)	46 of 100 (Notable)
David City 4E	United States	Record daily precipitation	42.7 mm (1.7 in)	46 of 100 (Notable)
Olga 2 SE	United States	Record daily precipitation	26.9 mm (1.1 in)	46 of 100 (Notable)
Virden	United States	Record daily precipitation	59.4 mm (2.3 in)	45 of 100 (Notable)
Van Buren 2	United States	Record daily snowfall	14.0 cm (5.5 in)	45 of 100 (Notable)
Wappapello Dam	United States	Record daily precipitation	72.4 mm (2.9 in)	45 of 100 (Notable)
Beaver	United States	Record low maximum temperature	5.6 C (42.1 F)	45 of 100 (Notable)
Onawa 3NW	United States	Record daily precipitation	55.9 mm (2.2 in)	44 of 100 (Notable)
Sac City	United States	Record daily precipitation	41.4 mm (1.6 in)	44 of 100 (Notable)
Benton Harbor AP	United States	Record daily precipitation	55.9 mm (2.2 in)	44 of 100 (Notable)
St Charles 7 SSW	United States	Record daily precipitation	61.5 mm (2.4 in)	44 of 100 (Notable)
W Pt	United States	Record daily precipitation	42.7 mm (1.7 in)	44 of 100 (Notable)
Kincaid 3W	United States	Record daily precipitation	59.9 mm (2.4 in)	43 of 100 (Notable)
Mason City 4SE	United States	Record daily precipitation	61.7 mm (2.4 in)	43 of 100 (Notable)
Logansport Cicott St	United States	Record daily precipitation	42.2 mm (1.7 in)	43 of 100 (Notable)
Burr Oak 4S	United States	Record low maximum temperature	4.4 C (39.9 F)	43 of 100 (Notable)
Doniphan	United States	Record daily precipitation	59.4 mm (2.3 in)	43 of 100 (Notable)
Poplar Bluff	United States	Record daily precipitation	67.3 mm (2.6 in)	43 of 100 (Notable)
Melbourne 5W	United States	Record daily precipitation	69.6 mm (2.7 in)	42 of 100 (Notable)
Knox Wwtp	United States	Record daily precipitation	48.3 mm (1.9 in)	42 of 100 (Notable)
Wakeeney	United States	Record low maximum temperature	4.4 C (39.9 F)	42 of 100 (Notable)
Farmerville	United States	Record daily precipitation	136.7 mm (5.4 in)	42 of 100 (Notable)
Racine Wwtp	United States	Record daily precipitation	48.5 mm (1.9 in)	42 of 100 (Notable)
Hvar	Croatia	Record daily precipitation	60.7 mm (2.4 in)	41 of 100 (Notable)
Greenville 2 NNE	United States	Record daily precipitation	44.2 mm (1.7 in)	41 of 100 (Notable)
Pacific	United States	Record daily precipitation	59.2 mm (2.3 in)	41 of 100 (Notable)
Bradshaw	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Culbertson	United States	Record low maximum temperature	2.2 C (36.0 F)	41 of 100 (Notable)

Counts by Type and Timescale

838 records

Records set or tied on 23 October 2009 by type: Highest daily maximum 123, Lowest daily maximum 141, Highest daily minimum 105, Lowest daily minimum 25, Heaviest daily rainfall 384, Heaviest daily snowfall 24, Deepest snow cover 36.

Records on 23 October 2009 by type
Record type	Records
Highest daily maximum	123
Lowest daily maximum	141
Highest daily minimum	105
Lowest daily minimum	25
Heaviest daily rainfall	384
Heaviest daily snowfall	24
Deepest snow cover	36

Records on 23 October 2009 by timescale: all-time 0, monthly 14, daily 824.

How Much Records Were Beaten By

685 broken records

Margins by which the 685 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 153.0. Ties are not counted.

Top 20 by Significance

23 October 2009

Top 20 records on 23 October 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 October 2009	Rochester Intl AP, US	daily snowfall	10.7 cm (4.2 in)	8.2 cm (3.2 in)	92 years	65 of 100 (Major)
23 October 2009	Morris 1NW, US	daily rain	67.3 mm (2.6 in)	38.6 mm (1.5 in)	52 years	59 of 100 (Notable)
23 October 2009	Logan 1 WNW, US	daily rain	47.5 mm (1.9 in)	19.1 mm (0.8 in)	103 years	57 of 100 (Notable)
23 October 2009	Don Muang, TH	daily rain	97.3 mm (3.8 in)	66.6 mm (2.6 in)	58 years	56 of 100 (Notable)
23 October 2009	Clinton 1SSW, US	daily rain	74.9 mm (2.9 in)	37.6 mm (1.5 in)	58 years	55 of 100 (Notable)
23 October 2009	Lowell Wwtp, US	daily rain	61.0 mm (2.4 in)	43.7 mm (1.7 in)	36 years	55 of 100 (Notable)
23 October 2009	Hosston, US	daily rain	93.5 mm (3.7 in)	60.5 mm (2.4 in)	52 years	53 of 100 (Notable)
23 October 2009	Elgin, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	96 years	52 of 100 (Notable)
23 October 2009	Osceola, US	daily snowfall	6.4 cm (2.5 in)	6.4 cm (2.5 in)	112 years	52 of 100 (Notable)
23 October 2009	Zaragoza, MX	daily rain	30.0 mm (1.2 in)	26.2 mm (1.0 in)	24 years	51 of 100 (Notable)
23 October 2009	Hardy, US	daily rain	60.5 mm (2.4 in)	17.3 mm (0.7 in)	96 years	51 of 100 (Notable)
23 October 2009	Plain Dealing, US	daily rain	80.3 mm (3.2 in)	26.5 mm (1.0 in)	90 years	51 of 100 (Notable)
23 October 2009	Ft Kent, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	80 years	51 of 100 (Notable)
23 October 2009	W Pt, US	daily snowfall	5.8 cm (2.3 in)	5.8 cm (2.3 in)	118 years	51 of 100 (Notable)
23 October 2009	Arkadelphia 2 N, US	daily rain	78.0 mm (3.1 in)	24.7 mm (1.0 in)	96 years	50 of 100 (Notable)
23 October 2009	Conway, US	daily rain	72.4 mm (2.9 in)	21.6 mm (0.9 in)	96 years	50 of 100 (Notable)
23 October 2009	Makaweli 965, US	daily high min	24.4 C (75.9 F)	1.6 C (2.9 F)	103 years	50 of 100 (Notable)
23 October 2009	Carlinville, US	daily rain	60.5 mm (2.4 in)	25.4 mm (1.0 in)	58 years	49 of 100 (Notable)
23 October 2009	Fairbury Wwtp, US	daily rain	70.6 mm (2.8 in)	59.4 mm (2.3 in)	12 years	49 of 100 (Notable)
23 October 2009	Kankakee Wwtp, US	daily rain	63.5 mm (2.5 in)	52.6 mm (2.1 in)	12 years	49 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 2009

Records set or tied on this calendar date in each year from 1795 to 2009. 2009 had 838 records.

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

Records on 10-23 in each year
Year	Records
1795	1
1802	2
1843	1
1845	1
1850	1
1851	2
1855	1
1859	2
1861	1
1863	1
1865	2
1866	1
1869	3
1871	2
1872	1
1873	2
1876	2
1878	1
1880	7
1881	2
1882	1
1883	1
1885	2
1888	1
1889	2
1890	2
1891	8
1892	3
1893	3
1894	5
1895	4
1896	2
1897	3
1898	5
1899	4
1900	8
1901	7
1902	7
1903	10
1904	7
1905	15
1906	17
1907	5
1908	19
1909	12
1910	6
1911	40
1912	50
1913	38
1914	9
1915	167
1916	290
1917	62
1918	12
1919	42
1920	262
1921	58
1922	38
1923	165
1924	160
1925	191
1926	131
1927	266
1928	120
1929	352
1930	310
1931	353
1932	310
1933	241
1934	333
1935	519
1936	490
1937	816
1938	403
1939	717
1940	304
1941	499
1942	306
1943	446
1944	283
1945	533
1946	258
1947	631
1948	251
1949	432
1950	507
1951	626
1952	432
1953	373
1954	317
1955	266
1956	587
1957	1,266
1958	255
1959	682
1960	341
1961	329
1962	141
1963	1,297
1964	264
1965	330
1966	625
1967	297
1968	175
1969	1,200
1970	617
1971	705
1972	601
1973	712
1974	653
1975	1,028
1976	879
1977	578
1978	570
1979	1,094
1980	584
1981	1,502
1982	1,071
1983	853
1984	1,261
1985	846
1986	968
1987	694
1988	619
1989	1,363
1990	954
1991	1,232
1992	1,176
1993	670
1994	558
1995	1,471
1996	1,396
1997	1,172
1998	1,221
1999	1,011
2000	1,275
2001	1,091
2002	1,868
2003	1,952
2004	1,224
2005	679
2006	1,976
2007	1,673
2008	993
2009	838
2010	683
2011	701
2012	1,017
2013	754
2014	755
2015	760
2016	460
2017	603
2018	322
2019	459
2020	1,777
2021	298
2022	1,342
2023	544
2024	674
2025	343

Download the Data

Data for records on 2009-10-23: 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 20	562
20 to 40	87
40 to 60	24
60 to 80	5
80 to 100	1
100 to 120	3
120 to 140	1
140 to 160	2