Weather Records on 18 December 2009

1,253 weather records were set or tied worldwide on 18 December 2009. Highest significance: Napier Downs, AU.

Key Facts for 18 December 2009

On 18 December 2009, 1,253 weather records were set or tied at long-record stations worldwide.
160 were record highs and 582 were record lows, counting maximum and minimum temperature.
By timescale, 7 were all-time records, 46 monthly and 1,200 daily.
Napier Downs set an all-time record daily precipitation of 402.0 mm (15.8 in) on 18 December 2009.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 475 records.

Record Map

1,253 stations

1,253 station records on 18 December 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 December 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Napier Downs	Australia	Record daily precipitation	402.0 mm (15.8 in)	88 of 100 (Exceptional)
Rosman	United States	Record daily snowfall	20.3 cm (8.0 in)	69 of 100 (Major)
Jubilee Downs	Australia	Record daily precipitation	100.0 mm (3.9 in)	66 of 100 (Major)
Eernewoude	Netherlands	Record snow depth	32.0 cm (12.6 in)	66 of 100 (Major)
Blina	Australia	Record daily precipitation	135.0 mm (5.3 in)	65 of 100 (Major)
Charleston Intl AP	United States	Record daily precipitation	80.8 mm (3.2 in)	65 of 100 (Major)
Mount Hart Station	Australia	Record daily precipitation	98.0 mm (3.9 in)	64 of 100 (Major)
Stuart	United States	Record daily precipitation	91.4 mm (3.6 in)	63 of 100 (Major)
Roanoke-Blacksburg Rgnl AP	United States	Record daily snowfall	30.5 cm (12.0 in)	61 of 100 (Major)
Beeac (Post Office)	Australia	Record daily precipitation	26.0 mm (1.0 in)	60 of 100 (Major)
Dwtn Charleston	United States	Record daily precipitation	97.0 mm (3.8 in)	59 of 100 (Notable)
Miami Beach	United States	Record daily precipitation	114.3 mm (4.5 in)	59 of 100 (Notable)
Key W Intl AP	United States	Record daily precipitation	83.3 mm (3.3 in)	58 of 100 (Notable)
Asheville	United States	Record snow depth	27.9 cm (11.0 in)	57 of 100 (Notable)
Pennyroyal Creek	Australia	Record daily precipitation	34.0 mm (1.3 in)	56 of 100 (Notable)
Carlindie	Australia	Record daily precipitation	63.0 mm (2.5 in)	54 of 100 (Notable)
Mirranatwa (Bowacka)	Australia	Record daily precipitation	27.2 mm (1.1 in)	54 of 100 (Notable)
Portland	Australia	Record daily precipitation	29.0 mm (1.1 in)	54 of 100 (Notable)
Warrion	Australia	Record daily precipitation	28.0 mm (1.1 in)	54 of 100 (Notable)
Presa Alvaro Obregon	Mexico	Record daily precipitation	35.8 mm (1.4 in)	54 of 100 (Notable)
Table Rock 4N	United States	Record snow depth	30.5 cm (12.0 in)	54 of 100 (Notable)
Key West NAS	United States	Record daily precipitation	69.8 mm (2.7 in)	54 of 100 (Notable)
Birregurra (Post Office)	Australia	Record daily precipitation	30.4 mm (1.2 in)	53 of 100 (Notable)
Richmond Intl AP	United States	Record daily snowfall	15.2 cm (6.0 in)	53 of 100 (Notable)
Bluefield Mercer Co AP	United States	Record daily snowfall	33.8 cm (13.3 in)	51 of 100 (Notable)
Danville Rgnl AP	United States	Record daily snowfall	13.5 cm (5.3 in)	51 of 100 (Notable)
Asheville	United States	Record daily snowfall	30.7 cm (12.1 in)	50 of 100 (Notable)
Tilburg	Netherlands	Record snow depth	12.0 cm (4.7 in)	49 of 100 (Notable)
Asheville	United States	Record daily precipitation	53.3 mm (2.1 in)	49 of 100 (Notable)
Emden-Wolthusen	Germany	Record snow depth	17.0 cm (6.7 in)	48 of 100 (Notable)
Nes (Ameland)	Netherlands	Record snow depth	14.0 cm (5.5 in)	48 of 100 (Notable)
Schagen	Netherlands	Record snow depth	12.0 cm (4.7 in)	47 of 100 (Notable)
Southport 5 N	United States	Record daily precipitation	52.1 mm (2.1 in)	47 of 100 (Notable)
Newport 1 NW	United States	Record daily snowfall	7.6 cm (3.0 in)	47 of 100 (Notable)
Camballin	Australia	Record daily precipitation	93.0 mm (3.7 in)	46 of 100 (Notable)
Forrest State Forest	Australia	Record daily precipitation	27.4 mm (1.1 in)	46 of 100 (Notable)
Union Juarez	Mexico	Record daily precipitation	49.8 mm (2.0 in)	46 of 100 (Notable)
Theda	Australia	Record daily precipitation	101.0 mm (4.0 in)	45 of 100 (Notable)
Madison	United States	Record snow depth	27.9 cm (11.0 in)	45 of 100 (Notable)
Gorredijk	Netherlands	Record snow depth	23.0 cm (9.1 in)	44 of 100 (Notable)
Thorsby Exp STN	United States	Record daily precipitation	66.5 mm (2.6 in)	44 of 100 (Notable)
Anna Paulowna	Netherlands	Record snow depth	12.0 cm (4.7 in)	42 of 100 (Notable)
Lemmer (Gemaal Buma)	Netherlands	Record snow depth	20.0 cm (7.9 in)	42 of 100 (Notable)
Evergreen	United States	Record daily precipitation	49.3 mm (1.9 in)	42 of 100 (Notable)
Melvin	United States	Record daily precipitation	107.2 mm (4.2 in)	42 of 100 (Notable)
Knoxville	United States	Record snow depth	35.6 cm (14.0 in)	42 of 100 (Notable)
W Palm Beach Intl AP	United States	Record daily precipitation	48.5 mm (1.9 in)	42 of 100 (Notable)
Bristol AP	United States	Record daily snowfall	16.3 cm (6.4 in)	42 of 100 (Notable)
Cranbrook (Cranbrook House)	Australia	Record daily precipitation	33.0 mm (1.3 in)	41 of 100 (Notable)
Chaam	Netherlands	Record snow depth	12.0 cm (4.7 in)	41 of 100 (Notable)
Ufa	Russia	Record low minimum temperature	-37.0 C (-34.6 F)	41 of 100 (Notable)
Parnu	Estonia	Record low minimum temperature	-21.8 C (-7.2 F)	40 of 100 (Notable)
Norderney	Germany	Record snow depth	17.0 cm (6.7 in)	40 of 100 (Notable)
Atotonilco El Alto	Mexico	Record low maximum temperature	11.7 C (53.1 F)	40 of 100 (Notable)
Joure	Netherlands	Record snow depth	31.0 cm (12.2 in)	40 of 100 (Notable)
Highland Home	United States	Record daily precipitation	38.1 mm (1.5 in)	40 of 100 (Notable)
Thomasville	United States	Record daily precipitation	77.5 mm (3.1 in)	40 of 100 (Notable)
Shubuta	United States	Record daily precipitation	90.2 mm (3.6 in)	40 of 100 (Notable)
Asheville AP	United States	Record daily precipitation	48.8 mm (1.9 in)	40 of 100 (Notable)
Lynchburg Rgnl AP	United States	Record daily snowfall	20.8 cm (8.2 in)	40 of 100 (Notable)

Counts by Type and Timescale

1,253 records

Records set or tied on 18 December 2009 by type: Highest daily maximum 64, Lowest daily maximum 345, Highest daily minimum 96, Lowest daily minimum 237, Heaviest daily rainfall 303, Heaviest daily snowfall 28, Deepest snow cover 180.

Records on 18 December 2009 by type
Record type	Records
Highest daily maximum	64
Lowest daily maximum	345
Highest daily minimum	96
Lowest daily minimum	237
Heaviest daily rainfall	303
Heaviest daily snowfall	28
Deepest snow cover	180

Records on 18 December 2009 by timescale: all-time 7, monthly 46, daily 1,200.

How Much Records Were Beaten By

1,097 broken records

Margins by which the 1,097 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 279.0. Ties are not counted.

Top 20 by Significance

18 December 2009

Top 20 records on 18 December 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 2009	Napier Downs, AU	all-time rain	402.0 mm (15.8 in)	146.2 mm (5.8 in)	63 years	88 of 100 (Exceptional)
18 December 2009	Rosman, US	daily snowfall	20.3 cm (8.0 in)	20.3 cm (8.0 in)	74 years	69 of 100 (Major)
18 December 2009	Jubilee Downs, AU	daily rain	100.0 mm (3.9 in)	79.7 mm (3.1 in)	68 years	66 of 100 (Major)
18 December 2009	Eernewoude, NL	all-time snow depth	32.0 cm (12.6 in)	9.0 cm (3.5 in)	41 years	66 of 100 (Major)
18 December 2009	Blina, AU	daily rain	135.0 mm (5.3 in)	104.5 mm (4.1 in)	63 years	65 of 100 (Major)
18 December 2009	Charleston Intl AP, US	daily rain	80.8 mm (3.2 in)	56.7 mm (2.2 in)	60 years	65 of 100 (Major)
18 December 2009	Mount Hart Station, AU	daily rain	98.0 mm (3.9 in)	63.5 mm (2.5 in)	83 years	64 of 100 (Major)
18 December 2009	Stuart, US	daily rain	91.4 mm (3.6 in)	65.7 mm (2.6 in)	55 years	63 of 100 (Major)
18 December 2009	Roanoke-Blacksburg Rgnl AP, US	daily snowfall	30.5 cm (12.0 in)	25.7 cm (10.1 in)	58 years	61 of 100 (Major)
18 December 2009	Beeac (Post Office), AU	daily rain	26.0 mm (1.0 in)	17.9 mm (0.7 in)	90 years	60 of 100 (Major)
18 December 2009	Dwtn Charleston, US	monthly rain	97.0 mm (3.8 in)	10.6 mm (0.4 in)	113 years	59 of 100 (Notable)
18 December 2009	Miami Beach, US	monthly rain	114.3 mm (4.5 in)	31.7 mm (1.2 in)	37 years	59 of 100 (Notable)
18 December 2009	Key W Intl AP, US	daily rain	83.3 mm (3.3 in)	71.1 mm (2.8 in)	43 years	58 of 100 (Notable)
18 December 2009	Asheville, US	monthly snow depth	27.9 cm (11.0 in)	5.0 cm (2.0 in)	79 years	57 of 100 (Notable)
18 December 2009	Pennyroyal Creek, AU	daily rain	34.0 mm (1.3 in)	12.7 mm (0.5 in)	107 years	56 of 100 (Notable)
18 December 2009	Carlindie, AU	daily rain	63.0 mm (2.5 in)	48.5 mm (1.9 in)	47 years	54 of 100 (Notable)
18 December 2009	Mirranatwa (Bowacka), AU	daily rain	27.2 mm (1.1 in)	12.0 mm (0.5 in)	107 years	54 of 100 (Notable)
18 December 2009	Portland, AU	daily rain	29.0 mm (1.1 in)	15.5 mm (0.6 in)	58 years	54 of 100 (Notable)
18 December 2009	Warrion, AU	daily rain	28.0 mm (1.1 in)	10.7 mm (0.4 in)	107 years	54 of 100 (Notable)
18 December 2009	Presa Alvaro Obregon, MX	monthly rain	35.8 mm (1.4 in)	8.9 mm (0.35 in)	68 years	54 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 1,253 records.

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

Records on 12-18 in each year
Year	Records
1793	1
1796	1
1805	1
1814	1
1825	1
1846	1
1849	1
1852	2
1858	1
1859	4
1862	2
1864	1
1868	1
1873	1
1875	1
1876	2
1878	1
1881	2
1882	1
1884	2
1886	1
1887	1
1888	1
1889	4
1890	5
1892	4
1894	8
1895	1
1897	4
1898	9
1899	3
1900	2
1901	6
1902	33
1903	11
1904	25
1905	3
1906	21
1907	15
1908	16
1909	18
1910	19
1911	9
1912	33
1913	38
1914	20
1915	28
1916	57
1917	62
1918	21
1919	117
1920	77
1921	123
1922	108
1923	378
1924	480
1925	74
1926	173
1927	151
1928	165
1929	366
1930	230
1931	360
1932	353
1933	506
1934	209
1935	138
1936	466
1937	459
1938	185
1939	900
1940	242
1941	213
1942	281
1943	419
1944	191
1945	598
1946	199
1947	266
1948	354
1949	561
1950	289
1951	867
1952	450
1953	373
1954	507
1955	611
1956	333
1957	901
1958	524
1959	477
1960	477
1961	885
1962	759
1963	571
1964	840
1965	402
1966	644
1967	1,105
1968	488
1969	376
1970	502
1971	387
1972	375
1973	1,008
1974	229
1975	625
1976	459
1977	992
1978	946
1979	1,087
1980	772
1981	1,362
1982	537
1983	2,014
1984	1,439
1985	1,384
1986	875
1987	1,505
1988	1,061
1989	1,818
1990	1,367
1991	756
1992	1,045
1993	697
1994	643
1995	1,065
1996	1,833
1997	1,195
1998	863
1999	923
2000	1,572
2001	906
2002	1,437
2003	987
2004	506
2005	987
2006	1,167
2007	746
2008	1,014
2009	1,253
2010	1,322
2011	697
2012	729
2013	513
2014	556
2015	1,254
2016	1,821
2017	516
2018	464
2019	679
2020	326
2021	762
2022	536
2023	1,293
2024	780
2025	994

Download the Data

Data for records on 2009-12-18: 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	1,021
50 to 100	55
100 to 150	14
150 to 200	4
200 to 250	1
250 to 300	2