Weather Records on 21 December 2009

1,097 weather records were set or tied worldwide on 21 December 2009. Highest significance: Indian Mills 2 W, US.

Key Facts for 21 December 2009

On 21 December 2009, 1,097 weather records were set or tied at long-record stations worldwide.
157 were record highs and 301 were record lows, counting maximum and minimum temperature.
By timescale, 27 were all-time records, 102 monthly and 968 daily.
Indian Mills 2 W set a daily record snow depth of 55.9 cm (22.0 in) on 21 December 2009.
Across 158 earlier years (1793 to 2025) the same calendar date averaged 485 records.

Record Map

1,097 stations

1,097 station records on 21 December 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 December 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Indian Mills 2 W	United States	Record snow depth	55.9 cm (22.0 in)	79 of 100 (Major)
Marlinton	United States	Record snow depth	48.3 cm (19.0 in)	77 of 100 (Major)
Benschop	Netherlands	Record snow depth	23.0 cm (9.1 in)	74 of 100 (Major)
Hammonton 1 NE	United States	Record snow depth	48.3 cm (19.0 in)	73 of 100 (Major)
Wuppertal-Buchenhofen	Germany	Record snow depth	26.0 cm (10.2 in)	69 of 100 (Major)
Tiel	Netherlands	Record snow depth	17.0 cm (6.7 in)	69 of 100 (Major)
Hot Springs	United States	Record snow depth	45.7 cm (18.0 in)	69 of 100 (Major)
Asheville	United States	Record snow depth	20.3 cm (8.0 in)	69 of 100 (Major)
Wijk Bij Duurstede	Netherlands	Record snow depth	17.0 cm (6.7 in)	68 of 100 (Major)
Chatham	United States	Record snow depth	25.4 cm (10.0 in)	68 of 100 (Major)
Phila Intl AP	United States	Record snow depth	45.7 cm (18.0 in)	66 of 100 (Major)
Baltimore-Washington Intl AP	United States	Record snow depth	33.0 cm (13.0 in)	66 of 100 (Major)
Duiven	Netherlands	Record snow depth	16.0 cm (6.3 in)	65 of 100 (Major)
Washington Reagan Natl AP	United States	Record snow depth	33.0 cm (13.0 in)	65 of 100 (Major)
Vleuten	Netherlands	Record snow depth	23.0 cm (9.1 in)	64 of 100 (Major)
Plymouth-Kingston	United States	Record snow depth	45.7 cm (18.0 in)	64 of 100 (Major)
Charlottesville 2W	United States	Record snow depth	43.2 cm (17.0 in)	64 of 100 (Major)
Lemmon	United States	Record daily snowfall	15.2 cm (6.0 in)	63 of 100 (Major)
Woodstock 2 NE	United States	Record snow depth	35.6 cm (14.0 in)	62 of 100 (Major)
Aberdeen Phillips Fld	United States	Record snow depth	35.6 cm (14.0 in)	62 of 100 (Major)
Conowingo Dam	United States	Record daily snowfall	30.5 cm (12.0 in)	61 of 100 (Major)
Varna	Bulgaria	Record daily precipitation	56.1 mm (2.2 in)	59 of 100 (Notable)
Beckley Va Hospital	United States	Record snow depth	40.6 cm (16.0 in)	59 of 100 (Notable)
Joure	Netherlands	Record snow depth	23.0 cm (9.1 in)	58 of 100 (Notable)
Stramproy	Netherlands	Record snow depth	13.0 cm (5.1 in)	58 of 100 (Notable)
Royal Oak 2 SSW	United States	Record snow depth	25.4 cm (10.0 in)	58 of 100 (Notable)
Buena Vista	United States	Record snow depth	30.5 cm (12.0 in)	58 of 100 (Notable)
Somerset	United States	Record snow depth	38.1 cm (15.0 in)	58 of 100 (Notable)
Vienna	United States	Record snow depth	33.0 cm (13.0 in)	58 of 100 (Notable)
Clarksburg 1	United States	Record snow depth	30.5 cm (12.0 in)	58 of 100 (Notable)
Natl Arboretum Dc	United States	Record snow depth	35.6 cm (14.0 in)	57 of 100 (Notable)
Bridgehampton	United States	Record snow depth	45.7 cm (18.0 in)	57 of 100 (Notable)
Warrenton 3 SE	United States	Record snow depth	45.7 cm (18.0 in)	56 of 100 (Notable)
Megen	Netherlands	Record snow depth	20.0 cm (7.9 in)	55 of 100 (Notable)
Dover	United States	Record snow depth	33.0 cm (13.0 in)	55 of 100 (Notable)
Covington Fltr Plt	United States	Record snow depth	38.1 cm (15.0 in)	55 of 100 (Notable)
Gassaway	United States	Record snow depth	35.6 cm (14.0 in)	55 of 100 (Notable)
Tonisvorst	Germany	Record snow depth	15.0 cm (5.9 in)	54 of 100 (Notable)
Zundert	Netherlands	Record snow depth	20.0 cm (7.9 in)	54 of 100 (Notable)
Gouda	Netherlands	Record snow depth	20.0 cm (7.9 in)	54 of 100 (Notable)
Herwen	Netherlands	Record snow depth	18.0 cm (7.1 in)	54 of 100 (Notable)
Wardensville R M Farm	United States	Record snow depth	35.6 cm (14.0 in)	54 of 100 (Notable)
Lemmer (Gemaal Buma)	Netherlands	Record snow depth	20.0 cm (7.9 in)	53 of 100 (Notable)
Herbayum	Netherlands	Record snow depth	13.0 cm (5.1 in)	53 of 100 (Notable)
Sneek	Netherlands	Record snow depth	22.0 cm (8.7 in)	53 of 100 (Notable)
Numansdorp	Netherlands	Record snow depth	12.0 cm (4.7 in)	52 of 100 (Notable)
Beltsville	United States	Record snow depth	40.6 cm (16.0 in)	52 of 100 (Notable)
Savage	United States	Record daily snowfall	8.9 cm (3.5 in)	52 of 100 (Notable)
Octoraro Lake	United States	Record snow depth	30.5 cm (12.0 in)	52 of 100 (Notable)
Piedmont Rsch STN	United States	Record snow depth	43.2 cm (17.0 in)	52 of 100 (Notable)
Bluestone Lake	United States	Record snow depth	35.6 cm (14.0 in)	52 of 100 (Notable)
Beckley Raleigh Co AP	United States	Record snow depth	50.8 cm (20.0 in)	52 of 100 (Notable)
Esbeek	Netherlands	Record snow depth	17.0 cm (6.7 in)	51 of 100 (Notable)
Aalsmeer	Netherlands	Record snow depth	14.0 cm (5.5 in)	51 of 100 (Notable)
Oosterbeek	Netherlands	Record snow depth	28.0 cm (11.0 in)	51 of 100 (Notable)
Chariton 1 E	United States	Record daily snowfall	12.7 cm (5.0 in)	51 of 100 (Notable)
Riverhead Rsch Farm	United States	Record snow depth	40.6 cm (16.0 in)	51 of 100 (Notable)
New Park	United States	Record snow depth	30.5 cm (12.0 in)	51 of 100 (Notable)
Klundert	Netherlands	Record snow depth	11.0 cm (4.3 in)	50 of 100 (Notable)
Weert	Netherlands	Record snow depth	10.0 cm (3.9 in)	50 of 100 (Notable)

Counts by Type and Timescale

1,097 records

Records set or tied on 21 December 2009 by type: Highest daily maximum 66, Lowest daily maximum 168, Highest daily minimum 91, Lowest daily minimum 133, Heaviest daily rainfall 155, Heaviest daily snowfall 54, Deepest snow cover 430.

Records on 21 December 2009 by type
Record type	Records
Highest daily maximum	66
Lowest daily maximum	168
Highest daily minimum	91
Lowest daily minimum	133
Heaviest daily rainfall	155
Heaviest daily snowfall	54
Deepest snow cover	430

Records on 21 December 2009 by timescale: all-time 27, monthly 102, daily 968.

How Much Records Were Beaten By

887 broken records

Margins by which the 887 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 381.0. Ties are not counted.

Top 20 by Significance

21 December 2009

Top 20 records on 21 December 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 December 2009	Indian Mills 2 W, US	daily snow depth	55.9 cm (22.0 in)	28.0 cm (11.0 in)	104 years	79 of 100 (Major)
21 December 2009	Marlinton, US	daily snow depth	48.3 cm (19.0 in)	28.0 cm (11.0 in)	92 years	77 of 100 (Major)
21 December 2009	Benschop, NL	all-time snow depth	23.0 cm (9.1 in)	8.0 cm (3.1 in)	53 years	74 of 100 (Major)
21 December 2009	Hammonton 1 NE, US	daily snow depth	48.3 cm (19.0 in)	38.1 cm (15.0 in)	76 years	73 of 100 (Major)
21 December 2009	Wuppertal-Buchenhofen, DE	monthly snow depth	26.0 cm (10.2 in)	11.0 cm (4.3 in)	57 years	69 of 100 (Major)
21 December 2009	Tiel, NL	monthly snow depth	17.0 cm (6.7 in)	9.0 cm (3.5 in)	46 years	69 of 100 (Major)
21 December 2009	Hot Springs, US	daily snow depth	45.7 cm (18.0 in)	35.5 cm (14.0 in)	64 years	69 of 100 (Major)
21 December 2009	Asheville, US	daily snow depth	20.3 cm (8.0 in)	12.7 cm (5.0 in)	79 years	69 of 100 (Major)
21 December 2009	Wijk Bij Duurstede, NL	monthly snow depth	17.0 cm (6.7 in)	9.0 cm (3.5 in)	46 years	68 of 100 (Major)
21 December 2009	Chatham, US	daily snow depth	25.4 cm (10.0 in)	22.9 cm (9.0 in)	67 years	68 of 100 (Major)
21 December 2009	Phila Intl AP, US	daily snow depth	45.7 cm (18.0 in)	27.9 cm (11.0 in)	64 years	66 of 100 (Major)
21 December 2009	Baltimore-Washington Intl AP, US	daily snow depth	33.0 cm (13.0 in)	20.3 cm (8.0 in)	64 years	66 of 100 (Major)
21 December 2009	Duiven, NL	monthly snow depth	16.0 cm (6.3 in)	8.0 cm (3.1 in)	46 years	65 of 100 (Major)
21 December 2009	Washington Reagan Natl AP, US	daily snow depth	33.0 cm (13.0 in)	20.3 cm (8.0 in)	64 years	65 of 100 (Major)
21 December 2009	Vleuten, NL	all-time snow depth	23.0 cm (9.1 in)	8.0 cm (3.1 in)	53 years	64 of 100 (Major)
21 December 2009	Plymouth-Kingston, US	daily snow depth	45.7 cm (18.0 in)	25.4 cm (10.0 in)	55 years	64 of 100 (Major)
21 December 2009	Charlottesville 2W, US	daily snow depth	43.2 cm (17.0 in)	30.5 cm (12.0 in)	47 years	64 of 100 (Major)
21 December 2009	Lemmon, US	daily snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	91 years	63 of 100 (Major)
21 December 2009	Woodstock 2 NE, US	daily snow depth	35.6 cm (14.0 in)	20.4 cm (8.0 in)	58 years	62 of 100 (Major)
21 December 2009	Aberdeen Phillips Fld, US	daily snow depth	35.6 cm (14.0 in)	17.8 cm (7.0 in)	76 years	62 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 1,097 records.

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

Records on 12-21 in each year
Year	Records
1793	1
1794	1
1799	1
1801	2
1808	3
1825	1
1828	1
1839	1
1846	1
1850	1
1855	7
1859	1
1860	1
1868	1
1870	1
1871	2
1874	2
1875	3
1876	1
1877	1
1878	1
1879	1
1880	1
1884	1
1886	3
1889	1
1890	4
1893	4
1894	1
1895	5
1896	3
1897	3
1898	1
1900	8
1901	15
1902	5
1903	25
1904	3
1905	15
1906	15
1907	17
1908	19
1909	20
1910	29
1911	36
1912	23
1913	11
1914	107
1915	43
1916	40
1917	18
1918	41
1919	57
1920	30
1921	104
1922	34
1923	323
1924	377
1925	120
1926	178
1927	147
1928	70
1929	156
1930	66
1931	556
1932	150
1933	581
1934	230
1935	398
1936	323
1937	189
1938	145
1939	140
1940	622
1941	651
1942	968
1943	148
1944	762
1945	396
1946	495
1947	700
1948	297
1949	1,281
1950	504
1951	1,061
1952	197
1953	256
1954	444
1955	888
1956	672
1957	846
1958	516
1959	272
1960	585
1961	254
1962	563
1963	1,137
1964	613
1965	247
1966	400
1967	1,923
1968	818
1969	828
1970	547
1971	680
1972	651
1973	1,292
1974	374
1975	548
1976	446
1977	470
1978	517
1979	558
1980	726
1981	1,476
1982	702
1983	3,324
1984	1,012
1985	979
1986	404
1987	775
1988	717
1989	3,203
1990	2,701
1991	1,125
1992	751
1993	967
1994	793
1995	878
1996	1,114
1997	810
1998	1,142
1999	851
2000	944
2001	650
2002	579
2003	1,103
2004	675
2005	606
2006	1,443
2007	946
2008	1,062
2009	1,097
2010	2,039
2011	653
2012	759
2013	1,029
2014	878
2015	1,173
2016	543
2017	459
2018	742
2019	755
2020	965
2021	323
2022	528
2023	1,170
2024	778
2025	1,100

Download the Data

Data for records on 2009-12-21: 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 2026-10-17 (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	645
50 to 100	126
100 to 150	48
150 to 200	27
200 to 250	16
250 to 300	13
300 to 350	8
350 to 400	4