Weather Records on 7 December 2009

972 weather records were set or tied worldwide on 7 December 2009. Highest significance: Carson City, US.

Key Facts for 7 December 2009

On 7 December 2009, 972 weather records were set or tied at long-record stations worldwide.
265 were record highs and 340 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 31 monthly and 939 daily.
Carson City set a daily record snowfall of 34.3 cm (13.5 in) on 7 December 2009.
Across 157 earlier years (1801 to 2025) the same calendar date averaged 491 records.

Record Map

972 stations

972 station records on 7 December 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 7 December 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Carson City	United States	Record daily snowfall	34.3 cm (13.5 in)	70 of 100 (Major)
Flagstaff AP	United States	Record daily snowfall	51.1 cm (20.1 in)	65 of 100 (Major)
Silverton	United States	Record daily snowfall	39.6 cm (15.6 in)	55 of 100 (Notable)
La Florida	Mexico	Record daily precipitation	41.9 mm (1.6 in)	54 of 100 (Notable)
Mankato	United States	Record daily snowfall	7.6 cm (3.0 in)	53 of 100 (Notable)
Jesus Maria	Mexico	Record daily precipitation	41.1 mm (1.6 in)	52 of 100 (Notable)
Mt Hamilton	United States	Record daily snowfall	16.0 cm (6.3 in)	52 of 100 (Notable)
Nevada City	United States	Record daily snowfall	25.4 cm (10.0 in)	52 of 100 (Notable)
Lovelock	United States	Record daily snowfall	15.2 cm (6.0 in)	51 of 100 (Notable)
Princess Anne	United States	Record daily precipitation	49.3 mm (1.9 in)	50 of 100 (Notable)
Manila	United States	Record daily snowfall	10.2 cm (4.0 in)	50 of 100 (Notable)
Pacific House	United States	Record daily snowfall	52.3 cm (20.6 in)	49 of 100 (Notable)
Deseret	United States	Record daily snowfall	12.7 cm (5.0 in)	48 of 100 (Notable)
Presa Rodriguez	Mexico	Record daily precipitation	59.2 mm (2.3 in)	46 of 100 (Notable)
Motozintla (Smn)	Mexico	Record low minimum temperature	1.7 C (35.1 F)	46 of 100 (Notable)
Mexcaltitan	Mexico	Record daily precipitation	45.0 mm (1.8 in)	46 of 100 (Notable)
Colfax	United States	Record daily snowfall	25.4 cm (10.0 in)	46 of 100 (Notable)
Chama	United States	Record daily snowfall	22.9 cm (9.0 in)	46 of 100 (Notable)
Manti	United States	Record daily snowfall	15.2 cm (6.0 in)	46 of 100 (Notable)
Nephi	United States	Record daily snowfall	22.4 cm (8.8 in)	46 of 100 (Notable)
Quincy	United States	Record daily snowfall	20.3 cm (8.0 in)	45 of 100 (Notable)
Glenbrook	United States	Record snow depth	43.2 cm (17.0 in)	45 of 100 (Notable)
Morgan	United States	Record daily precipitation	40.6 mm (1.6 in)	45 of 100 (Notable)
S Haven	United States	Record daily precipitation	38.1 mm (1.5 in)	44 of 100 (Notable)
Lovelock	United States	Record snow depth	15.2 cm (6.0 in)	44 of 100 (Notable)
Ephraim	United States	Record daily snowfall	9.1 cm (3.6 in)	44 of 100 (Notable)
Scipio	United States	Record daily snowfall	12.7 cm (5.0 in)	44 of 100 (Notable)
El Hongo	Mexico	Record daily precipitation	41.4 mm (1.6 in)	43 of 100 (Notable)
San Juan Peyotan	Mexico	Record daily precipitation	37.3 mm (1.5 in)	43 of 100 (Notable)
Doyle	United States	Record daily snowfall	20.3 cm (8.0 in)	43 of 100 (Notable)
Susanville 2SW	United States	Record daily snowfall	12.7 cm (5.0 in)	43 of 100 (Notable)
Clay Ctr	United States	Record daily snowfall	14.2 cm (5.6 in)	43 of 100 (Notable)
Bloomfield 3 SE	United States	Record daily snowfall	5.1 cm (2.0 in)	43 of 100 (Notable)
Alton	United States	Record daily snowfall	27.9 cm (11.0 in)	43 of 100 (Notable)
Grass Valley #2	United States	Record daily snowfall	20.3 cm (8.0 in)	42 of 100 (Notable)
Idyllwild Fire Dept	United States	Record daily snowfall	25.4 cm (10.0 in)	42 of 100 (Notable)
Blue Hill 4 SW	United States	Record daily snowfall	15.2 cm (6.0 in)	42 of 100 (Notable)
Ephraim	United States	Record snow depth	10.2 cm (4.0 in)	42 of 100 (Notable)
Moroni	United States	Record snow depth	25.4 cm (10.0 in)	42 of 100 (Notable)
Valle de Las Palmas	Mexico	Record daily precipitation	41.4 mm (1.6 in)	41 of 100 (Notable)
San Pedro	Mexico	Record daily precipitation	41.1 mm (1.6 in)	41 of 100 (Notable)
Ojai	United States	Record low maximum temperature	7.8 C (46.0 F)	41 of 100 (Notable)
Grants Pass	United States	Record low minimum temperature	-8.9 C (16.0 F)	41 of 100 (Notable)
Duchesne	United States	Record low maximum temperature	-11.7 C (10.9 F)	41 of 100 (Notable)
San Diego Miramar NAS	United States	Record daily precipitation	55.6 mm (2.2 in)	41 of 100 (Notable)
Crescent City 3 NNW	United States	Record low minimum temperature	-4.4 C (24.1 F)	40 of 100 (Notable)
Crescent Lake Nwr	United States	Record daily snowfall	8.9 cm (3.5 in)	40 of 100 (Notable)
Mina	United States	Record daily snowfall	5.1 cm (2.0 in)	40 of 100 (Notable)
Aztec Ruins Nm	United States	Record daily snowfall	5.1 cm (2.0 in)	40 of 100 (Notable)
Pendleton Dwtn	United States	Record low minimum temperature	-13.3 C (8.1 F)	40 of 100 (Notable)
The Poplars	United States	Record low maximum temperature	-11.7 C (10.9 F)	40 of 100 (Notable)
Galveston Scholes Fld	United States	Record daily precipitation	34.0 mm (1.3 in)	40 of 100 (Notable)
San Miguel Chimalapa	Mexico	Record low minimum temperature	2.8 C (37.0 F)	39 of 100 (Notable)
Auberry 2 NW	United States	Record low minimum temperature	-5.6 C (21.9 F)	39 of 100 (Notable)
Joseph	United States	Record low maximum temperature	-7.2 C (19.0 F)	39 of 100 (Notable)
Ft Duchesne	United States	Record daily snowfall	5.1 cm (2.0 in)	39 of 100 (Notable)
Roseburg Rgnl AP	United States	Record low minimum temperature	-8.2 C (17.2 F)	39 of 100 (Notable)
Altenbern	United States	Record daily snowfall	27.9 cm (11.0 in)	38 of 100 (Notable)
Burlington	United States	Record daily snowfall	5.6 cm (2.2 in)	38 of 100 (Notable)
Beowawe	United States	Record daily snowfall	7.6 cm (3.0 in)	38 of 100 (Notable)

Counts by Type and Timescale

972 records

Records set or tied on 7 December 2009 by type: Highest daily maximum 111, Lowest daily maximum 205, Highest daily minimum 154, Lowest daily minimum 135, Heaviest daily rainfall 168, Heaviest daily snowfall 139, Deepest snow cover 60.

Records on 7 December 2009 by type
Record type	Records
Highest daily maximum	111
Lowest daily maximum	205
Highest daily minimum	154
Lowest daily minimum	135
Heaviest daily rainfall	168
Heaviest daily snowfall	139
Deepest snow cover	60

Records on 7 December 2009 by timescale: all-time 2, monthly 31, daily 939.

How Much Records Were Beaten By

733 broken records

Margins by which the 733 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 384.0. Ties are not counted.

Top 20 by Significance

7 December 2009

Top 20 records on 7 December 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 December 2009	Carson City, US	daily snowfall	34.3 cm (13.5 in)	30.5 cm (12.0 in)	67 years	70 of 100 (Major)
7 December 2009	Flagstaff AP, US	daily snowfall	51.1 cm (20.1 in)	38.4 cm (15.1 in)	52 years	65 of 100 (Major)
7 December 2009	Silverton, US	daily snowfall	39.6 cm (15.6 in)	21.8 cm (8.6 in)	52 years	55 of 100 (Notable)
7 December 2009	La Florida, MX	daily rain	41.9 mm (1.6 in)	32.5 mm (1.3 in)	40 years	54 of 100 (Notable)
7 December 2009	Mankato, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	100 years	53 of 100 (Notable)
7 December 2009	Jesus Maria, MX	daily rain	41.1 mm (1.6 in)	38.8 mm (1.5 in)	40 years	52 of 100 (Notable)
7 December 2009	Mt Hamilton, US	daily snowfall	16.0 cm (6.3 in)	16.0 cm (6.3 in)	60 years	52 of 100 (Notable)
7 December 2009	Nevada City, US	daily snowfall	25.4 cm (10.0 in)	10.2 cm (4.0 in)	87 years	52 of 100 (Notable)
7 December 2009	Lovelock, US	daily snowfall	15.2 cm (6.0 in)	6.3 cm (2.5 in)	90 years	51 of 100 (Notable)
7 December 2009	Princess Anne, US	daily rain	49.3 mm (1.9 in)	10.4 mm (0.4 in)	100 years	50 of 100 (Notable)
7 December 2009	Manila, US	daily snowfall	10.2 cm (4.0 in)	5.1 cm (2.0 in)	98 years	50 of 100 (Notable)
7 December 2009	Pacific House, US	monthly snowfall	52.3 cm (20.6 in)	14.2 cm (5.6 in)	60 years	49 of 100 (Notable)
7 December 2009	Deseret, US	daily snowfall	12.7 cm (5.0 in)	5.1 cm (2.0 in)	87 years	48 of 100 (Notable)
7 December 2009	Presa Rodriguez, MX	daily rain	59.2 mm (2.3 in)	32.3 mm (1.3 in)	16 years	46 of 100 (Notable)
7 December 2009	Motozintla (Smn), MX	daily low min	1.7 C (35.1 F)	3.9 C (7.0 F)	86 years	46 of 100 (Notable)
7 December 2009	Mexcaltitan, MX	daily rain	45.0 mm (1.8 in)	45.0 mm (1.8 in)	40 years	46 of 100 (Notable)
7 December 2009	Colfax, US	daily snowfall	25.4 cm (10.0 in)	17.8 cm (7.0 in)	36 years	46 of 100 (Notable)
7 December 2009	Chama, US	daily snowfall	22.9 cm (9.0 in)	5.1 cm (2.0 in)	114 years	46 of 100 (Notable)
7 December 2009	Manti, US	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	63 years	46 of 100 (Notable)
7 December 2009	Nephi, US	daily snowfall	22.4 cm (8.8 in)	9.7 cm (3.8 in)	62 years	46 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

1801 to 2009

Records set or tied on this calendar date in each year from 1801 to 2009. 2009 had 972 records.

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

Records on 12-07 in each year
Year	Records
1801	1
1805	1
1812	2
1815	1
1825	2
1832	1
1836	1
1839	1
1844	4
1848	3
1852	1
1856	3
1863	1
1866	1
1868	5
1871	5
1875	6
1879	5
1881	1
1884	2
1885	1
1889	1
1890	2
1891	3
1892	1
1893	5
1894	1
1895	1
1896	8
1897	4
1898	10
1899	3
1900	2
1901	9
1902	16
1903	9
1904	7
1905	3
1906	21
1907	4
1908	24
1909	21
1910	26
1911	7
1912	21
1913	19
1914	32
1915	53
1916	36
1917	52
1918	30
1919	38
1920	81
1921	39
1922	272
1923	128
1924	374
1925	119
1926	372
1927	404
1928	105
1929	146
1930	534
1931	180
1932	555
1933	130
1934	274
1935	270
1936	602
1937	890
1938	279
1939	780
1940	145
1941	139
1942	526
1943	199
1944	357
1945	240
1946	855
1947	240
1948	320
1949	187
1950	1,472
1951	1,751
1952	447
1953	673
1954	445
1955	195
1956	1,358
1957	589
1958	831
1959	539
1960	561
1961	206
1962	642
1963	436
1964	467
1965	476
1966	1,047
1967	386
1968	461
1969	952
1970	724
1971	854
1972	2,239
1973	448
1974	508
1975	404
1976	1,037
1977	1,369
1978	1,882
1979	827
1980	1,314
1981	896
1982	542
1983	957
1984	957
1985	922
1986	1,126
1987	866
1988	582
1989	675
1990	744
1991	698
1992	906
1993	544
1994	1,772
1995	912
1996	1,152
1997	818
1998	2,384
1999	674
2000	1,085
2001	743
2002	917
2003	1,184
2004	1,096
2005	1,433
2006	1,246
2007	1,402
2008	833
2009	972
2010	1,405
2011	1,507
2012	643
2013	2,119
2014	479
2015	1,079
2016	389
2017	508
2018	558
2019	447
2020	597
2021	547
2022	579
2023	952
2024	712
2025	665

Download the Data

Data for records on 2009-12-07: 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	665
50 to 100	42
100 to 150	14
150 to 200	6
200 to 250	3
250 to 300	0
300 to 350	2
350 to 400	1