Weather Records on 20 December 2009

1,502 weather records were set or tied worldwide on 20 December 2009. Highest significance: Indian Mills 2 W, US.

Key Facts for 20 December 2009

On 20 December 2009, 1,502 weather records were set or tied at long-record stations worldwide.
182 were record highs and 597 were record lows, counting maximum and minimum temperature.
By timescale, 20 were all-time records, 171 monthly and 1,311 daily.
Indian Mills 2 W set a monthly record snow depth of 61.0 cm (24.0 in) on 20 December 2009.
Across 163 earlier years (1793 to 2025) the same calendar date averaged 461 records.

Record Map

1,502 stations

1,502 station records on 20 December 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 December 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Indian Mills 2 W	United States	Record snow depth	61.0 cm (24.0 in)	85 of 100 (Exceptional)
Aberdeen Phillips Fld	United States	Record daily snowfall	44.5 cm (17.5 in)	79 of 100 (Major)
Aberdeen Phillips Fld	United States	Record snow depth	48.3 cm (19.0 in)	76 of 100 (Major)
Hammonton 1 NE	United States	Record snow depth	55.9 cm (22.0 in)	72 of 100 (Major)
Seabrook Farms	United States	Record daily snowfall	50.8 cm (20.0 in)	72 of 100 (Major)
Purcellville	United States	Record daily snowfall	40.6 cm (16.0 in)	71 of 100 (Major)
Marlinton	United States	Record snow depth	48.3 cm (19.0 in)	71 of 100 (Major)
Phila Intl AP	United States	Record snow depth	53.3 cm (21.0 in)	71 of 100 (Major)
Washington Reagan Natl AP	United States	Record snow depth	40.6 cm (16.0 in)	71 of 100 (Major)
Romney 1 SW	United States	Record snow depth	45.7 cm (18.0 in)	69 of 100 (Major)
Asheville	United States	Record snow depth	22.9 cm (9.0 in)	69 of 100 (Major)
Vienna	United States	Record snow depth	50.8 cm (20.0 in)	68 of 100 (Major)
Hot Springs	United States	Record snow depth	66.0 cm (26.0 in)	67 of 100 (Major)
Etne	Norway	Record snow depth	80.0 cm (31.5 in)	66 of 100 (Major)
Natl Arboretum Dc	United States	Record snow depth	40.6 cm (16.0 in)	66 of 100 (Major)
Hammonton 1 NE	United States	Record daily snowfall	50.3 cm (19.8 in)	66 of 100 (Major)
Chestertown	United States	Record snow depth	35.6 cm (14.0 in)	65 of 100 (Major)
Plymouth-Kingston	United States	Record snow depth	50.8 cm (20.0 in)	64 of 100 (Major)
Wardensville R M Farm	United States	Record snow depth	45.7 cm (18.0 in)	64 of 100 (Major)
Bjorheim I Ryfylke	Norway	Record snow depth	62.0 cm (24.4 in)	63 of 100 (Major)
Indian Mills 2 W	United States	Record daily snowfall	30.5 cm (12.0 in)	63 of 100 (Major)
Mechanicsville 5 NE	United States	Record snow depth	40.6 cm (16.0 in)	62 of 100 (Major)
Woodstock 2 NE	United States	Record snow depth	48.3 cm (19.0 in)	62 of 100 (Major)
Baltimore-Washington Intl AP	United States	Record snow depth	45.7 cm (18.0 in)	62 of 100 (Major)
Conowingo Dam	United States	Record daily snowfall	33.0 cm (13.0 in)	61 of 100 (Major)
Buena Vista	United States	Record snow depth	33.0 cm (13.0 in)	61 of 100 (Major)
Motozintla (Smn)	Mexico	Record daily precipitation	38.6 mm (1.5 in)	60 of 100 (Major)
Beckley Va Hospital	United States	Record snow depth	43.2 cm (17.0 in)	60 of 100 (Major)
Herwen	Netherlands	Record snow depth	20.0 cm (7.9 in)	58 of 100 (Notable)
Joure	Netherlands	Record snow depth	25.0 cm (9.8 in)	58 of 100 (Notable)
Beltsville	United States	Record snow depth	45.7 cm (18.0 in)	58 of 100 (Notable)
Upper Marlboro 3 NNW	United States	Record snow depth	40.6 cm (16.0 in)	58 of 100 (Notable)
Emmitsburg 2 SE	United States	Record daily snowfall	45.7 cm (18.0 in)	57 of 100 (Notable)
Kerrs Creek 6 WNW	United States	Record snow depth	45.7 cm (18.0 in)	57 of 100 (Notable)
Roebuck Plains	Australia	Record daily precipitation	120.0 mm (4.7 in)	56 of 100 (Notable)
Minaru	Australia	Record daily precipitation	46.0 mm (1.8 in)	56 of 100 (Notable)
Den Burg	Netherlands	Record snow depth	14.0 cm (5.5 in)	56 of 100 (Notable)
Riverhead Rsch Farm	United States	Record daily snowfall	50.8 cm (20.0 in)	55 of 100 (Notable)
Blacksburg Nwso	United States	Record snow depth	33.0 cm (13.0 in)	55 of 100 (Notable)
Emmitsburg 2 SE	United States	Record snow depth	45.7 cm (18.0 in)	54 of 100 (Notable)
Lafayette 1 NE	United States	Record snow depth	33.0 cm (13.0 in)	54 of 100 (Notable)
Lexington	United States	Record snow depth	33.0 cm (13.0 in)	54 of 100 (Notable)
Tye Rvr 1 SE	United States	Record snow depth	40.6 cm (16.0 in)	54 of 100 (Notable)
Country Downs	Australia	Record daily precipitation	144.6 mm (5.7 in)	53 of 100 (Notable)
Onnen	Netherlands	Record snow depth	22.0 cm (8.7 in)	53 of 100 (Notable)
Sneek	Netherlands	Record snow depth	22.0 cm (8.7 in)	53 of 100 (Notable)
Solomons	United States	Record snow depth	27.9 cm (11.0 in)	53 of 100 (Notable)
Corbin	United States	Record daily snowfall	30.5 cm (12.0 in)	53 of 100 (Notable)
Huddleston 4 SW	United States	Record snow depth	30.5 cm (12.0 in)	53 of 100 (Notable)
WFO Sterling	United States	Record snow depth	48.3 cm (19.0 in)	53 of 100 (Notable)
Atlantic City Intl AP	United States	Record snow depth	27.9 cm (11.0 in)	53 of 100 (Notable)
Riverhead Rsch Farm	United States	Record snow depth	50.8 cm (20.0 in)	52 of 100 (Notable)
Bluestone Lake	United States	Record snow depth	38.1 cm (15.0 in)	52 of 100 (Notable)
Clarksburg 1	United States	Record snow depth	33.0 cm (13.0 in)	52 of 100 (Notable)
Zetten	Netherlands	Record snow depth	11.0 cm (4.3 in)	51 of 100 (Notable)
E Wareham	United States	Record daily snowfall	45.7 cm (18.0 in)	51 of 100 (Notable)
Enka	United States	Record daily snowfall	10.2 cm (4.0 in)	51 of 100 (Notable)
Sparta 3.5 SSW	United States	Record snow depth	30.5 cm (12.0 in)	51 of 100 (Notable)
Pulaski 2 E	United States	Record snow depth	27.9 cm (11.0 in)	51 of 100 (Notable)
Glady 1 N	United States	Record daily snowfall	33.0 cm (13.0 in)	51 of 100 (Notable)

Counts by Type and Timescale

1,502 records

Records set or tied on 20 December 2009 by type: Highest daily maximum 88, Lowest daily maximum 259, Highest daily minimum 94, Lowest daily minimum 338, Heaviest daily rainfall 223, Heaviest daily snowfall 135, Deepest snow cover 365.

Records on 20 December 2009 by type
Record type	Records
Highest daily maximum	88
Lowest daily maximum	259
Highest daily minimum	94
Lowest daily minimum	338
Heaviest daily rainfall	223
Heaviest daily snowfall	135
Deepest snow cover	365

Records on 20 December 2009 by timescale: all-time 20, monthly 171, daily 1,311.

How Much Records Were Beaten By

1,272 broken records

Margins by which the 1,272 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 305.0. Ties are not counted.

Top 20 by Significance

20 December 2009

Top 20 records on 20 December 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 December 2009	Indian Mills 2 W, US	monthly snow depth	61.0 cm (24.0 in)	25.4 cm (10.0 in)	105 years	85 of 100 (Exceptional)
20 December 2009	Aberdeen Phillips Fld, US	monthly snowfall	44.5 cm (17.5 in)	19.1 cm (7.5 in)	77 years	79 of 100 (Major)
20 December 2009	Aberdeen Phillips Fld, US	monthly snow depth	48.3 cm (19.0 in)	20.4 cm (8.0 in)	77 years	76 of 100 (Major)
20 December 2009	Hammonton 1 NE, US	all-time snow depth	55.9 cm (22.0 in)	10.2 cm (4.0 in)	101 years	72 of 100 (Major)
20 December 2009	Seabrook Farms, US	all-time snowfall	50.8 cm (20.0 in)	22.9 cm (9.0 in)	22 years	72 of 100 (Major)
20 December 2009	Purcellville, US	monthly snowfall	40.6 cm (16.0 in)	12.7 cm (5.0 in)	105 years	71 of 100 (Major)
20 December 2009	Marlinton, US	daily snow depth	48.3 cm (19.0 in)	22.9 cm (9.0 in)	92 years	71 of 100 (Major)
20 December 2009	Phila Intl AP, US	monthly snow depth	53.3 cm (21.0 in)	22.8 cm (9.0 in)	49 years	71 of 100 (Major)
20 December 2009	Washington Reagan Natl AP, US	monthly snow depth	40.6 cm (16.0 in)	20.3 cm (8.0 in)	52 years	71 of 100 (Major)
20 December 2009	Romney 1 SW, US	daily snow depth	45.7 cm (18.0 in)	30.5 cm (12.0 in)	67 years	69 of 100 (Major)
20 December 2009	Asheville, US	daily snow depth	22.9 cm (9.0 in)	12.7 cm (5.0 in)	79 years	69 of 100 (Major)
20 December 2009	Vienna, US	monthly snow depth	50.8 cm (20.0 in)	20.3 cm (8.0 in)	49 years	68 of 100 (Major)
20 December 2009	Hot Springs, US	all-time snow depth	66.0 cm (26.0 in)	10.1 cm (4.0 in)	69 years	67 of 100 (Major)
20 December 2009	Etne, NO	all-time snow depth	80.0 cm (31.5 in)	22.0 cm (8.7 in)	22 years	66 of 100 (Major)
20 December 2009	Natl Arboretum Dc, US	monthly snow depth	40.6 cm (16.0 in)	22.8 cm (9.0 in)	36 years	66 of 100 (Major)
20 December 2009	Hammonton 1 NE, US	all-time snowfall	50.3 cm (19.8 in)	4.6 cm (1.8 in)	101 years	66 of 100 (Major)
20 December 2009	Chestertown, US	daily snow depth	35.6 cm (14.0 in)	22.9 cm (9.0 in)	67 years	65 of 100 (Major)
20 December 2009	Plymouth-Kingston, US	monthly snow depth	50.8 cm (20.0 in)	22.9 cm (9.0 in)	28 years	64 of 100 (Major)
20 December 2009	Wardensville R M Farm, US	daily snow depth	45.7 cm (18.0 in)	30.5 cm (12.0 in)	58 years	64 of 100 (Major)
20 December 2009	Bjorheim I Ryfylke, NO	all-time snow depth	62.0 cm (24.4 in)	15.0 cm (5.9 in)	47 years	63 of 100 (Major)

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 1,502 records.

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

Records on 12-20 in each year
Year	Records
1793	1
1795	1
1804	1
1805	2
1808	1
1815	1
1828	1
1837	1
1846	1
1855	8
1858	1
1860	1
1866	1
1867	1
1868	1
1869	1
1871	2
1874	3
1875	1
1877	2
1878	1
1879	1
1880	1
1881	1
1882	1
1884	4
1885	1
1886	4
1889	4
1890	2
1891	2
1892	1
1894	2
1895	8
1896	1
1897	4
1898	2
1899	1
1900	7
1901	8
1902	14
1903	17
1904	9
1905	5
1906	5
1907	11
1908	5
1909	22
1910	17
1911	24
1912	27
1913	7
1914	43
1915	18
1916	45
1917	33
1918	18
1919	25
1920	22
1921	101
1922	88
1923	215
1924	332
1925	96
1926	163
1927	200
1928	93
1929	256
1930	67
1931	536
1932	170
1933	492
1934	265
1935	152
1936	416
1937	181
1938	240
1939	308
1940	965
1941	633
1942	817
1943	193
1944	340
1945	430
1946	327
1947	385
1948	345
1949	1,141
1950	758
1951	926
1952	394
1953	385
1954	416
1955	726
1956	471
1957	1,354
1958	382
1959	142
1960	354
1961	369
1962	475
1963	875
1964	499
1965	353
1966	555
1967	1,370
1968	482
1969	514
1970	518
1971	441
1972	448
1973	1,184
1974	328
1975	610
1976	382
1977	484
1978	910
1979	600
1980	667
1981	1,681
1982	712
1983	2,995
1984	1,411
1985	1,035
1986	321
1987	1,179
1988	760
1989	1,812
1990	1,885
1991	1,172
1992	1,134
1993	1,266
1994	813
1995	1,128
1996	1,448
1997	651
1998	1,110
1999	938
2000	1,150
2001	523
2002	943
2003	1,315
2004	836
2005	515
2006	1,387
2007	986
2008	1,356
2009	1,502
2010	2,055
2011	846
2012	1,131
2013	584
2014	524
2015	1,238
2016	603
2017	688
2018	592
2019	731
2020	554
2021	442
2022	567
2023	1,242
2024	897
2025	1,166

Download the Data

Data for records on 2009-12-20: 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	1,014
50 to 100	119
100 to 150	60
150 to 200	35
200 to 250	29
250 to 300	11
300 to 350	4