Weather Records on 18 December 2011

697 weather records were set or tied worldwide on 18 December 2011. Highest significance: Wentworth Post Office, AU.

Key Facts for 18 December 2011

On 18 December 2011, 697 weather records were set or tied at long-record stations worldwide.
230 were record highs and 100 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 26 monthly and 669 daily.
Wentworth Post Office set a daily record precipitation of 72.6 mm (2.9 in) on 18 December 2011.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 478 records.

Record Map

697 stations

697 station records on 18 December 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 December 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Wentworth Post Office	Australia	Record daily precipitation	72.6 mm (2.9 in)	80 of 100 (Exceptional)
Moorook	Australia	Record daily precipitation	58.6 mm (2.3 in)	77 of 100 (Major)
Lake Victoria Storage	Australia	Record daily precipitation	55.2 mm (2.2 in)	75 of 100 (Major)
Renmark Irrigation	Australia	Record daily precipitation	71.0 mm (2.8 in)	70 of 100 (Major)
Pinnaroo	Australia	Record daily precipitation	55.2 mm (2.2 in)	70 of 100 (Major)
Warranooke (Glenorchy)	Australia	Record daily precipitation	37.2 mm (1.5 in)	67 of 100 (Major)
Kingston on Murray	Australia	Record daily precipitation	62.8 mm (2.5 in)	66 of 100 (Major)
Penneshaw	Australia	Record daily precipitation	36.6 mm (1.4 in)	64 of 100 (Major)
Geranium	Australia	Record daily precipitation	49.0 mm (1.9 in)	64 of 100 (Major)
Black Hill	Australia	Record daily precipitation	56.0 mm (2.2 in)	63 of 100 (Major)
Nockatunga Station	Australia	Record daily precipitation	143.0 mm (5.6 in)	63 of 100 (Major)
Murray Lock Number 9	Australia	Record daily precipitation	40.0 mm (1.6 in)	63 of 100 (Major)
Warracknabeal (Earlstan)	Australia	Record daily precipitation	52.0 mm (2.0 in)	63 of 100 (Major)
Parrakie	Australia	Record daily precipitation	46.2 mm (1.8 in)	62 of 100 (Major)
Antwerp	Australia	Record daily precipitation	37.5 mm (1.5 in)	62 of 100 (Major)
Myponga	Australia	Record daily precipitation	29.0 mm (1.1 in)	61 of 100 (Major)
Rainbow (Werrap (Oak-Lea))	Australia	Record daily precipitation	48.6 mm (1.9 in)	61 of 100 (Major)
Loxton (Pyap)	Australia	Record daily precipitation	47.0 mm (1.9 in)	59 of 100 (Notable)
Alawoona (Schells Well)	Australia	Record daily precipitation	44.0 mm (1.7 in)	59 of 100 (Notable)
Beulah	Australia	Record daily precipitation	49.0 mm (1.9 in)	59 of 100 (Notable)
Orroroo (Black Rock)	Australia	Record daily precipitation	47.2 mm (1.9 in)	58 of 100 (Notable)
Two Wells	Australia	Record daily precipitation	32.6 mm (1.3 in)	58 of 100 (Notable)
Taldra	Australia	Record daily precipitation	46.0 mm (1.8 in)	55 of 100 (Notable)
Eromanga - Webber St	Australia	Record daily precipitation	51.0 mm (2.0 in)	55 of 100 (Notable)
Werrimull	Australia	Record daily precipitation	32.0 mm (1.3 in)	55 of 100 (Notable)
Farrell Flat	Australia	Record daily precipitation	82.4 mm (3.2 in)	54 of 100 (Notable)
Whyte-Yarcowie (Gum Park)	Australia	Record daily precipitation	61.8 mm (2.4 in)	54 of 100 (Notable)
Minlaton (Eversley)	Australia	Record daily precipitation	48.8 mm (1.9 in)	54 of 100 (Notable)
Tanunda	Australia	Record daily precipitation	54.0 mm (2.1 in)	54 of 100 (Notable)
Coomandook	Australia	Record daily precipitation	32.4 mm (1.3 in)	54 of 100 (Notable)
Purnong (Claypans)	Australia	Record daily precipitation	60.0 mm (2.4 in)	53 of 100 (Notable)
Euston (Sunnyside)	Australia	Record daily precipitation	48.0 mm (1.9 in)	53 of 100 (Notable)
Drung Drung	Australia	Record daily precipitation	34.6 mm (1.4 in)	53 of 100 (Notable)
White Cliffs (Kayrunnera)	Australia	Record daily precipitation	50.0 mm (2.0 in)	52 of 100 (Notable)
Lyndoch	Australia	Record daily precipitation	38.6 mm (1.5 in)	51 of 100 (Notable)
Warracknabeal (Ailsa)	Australia	Record daily precipitation	35.0 mm (1.4 in)	51 of 100 (Notable)
Murtoa	Australia	Record daily precipitation	38.0 mm (1.5 in)	51 of 100 (Notable)
Lyrup	Australia	Record daily precipitation	54.6 mm (2.1 in)	50 of 100 (Notable)
Whyte Yarcowie	Australia	Record daily precipitation	85.0 mm (3.3 in)	49 of 100 (Notable)
Manoora (Cooinda)	Australia	Record daily precipitation	87.2 mm (3.4 in)	49 of 100 (Notable)
Rosedale (Turretfield Research	Australia	Record daily precipitation	34.4 mm (1.4 in)	49 of 100 (Notable)
Point Pass	Australia	Record daily precipitation	77.4 mm (3.0 in)	49 of 100 (Notable)
Coorabulka	Australia	Record daily precipitation	42.0 mm (1.7 in)	49 of 100 (Notable)
Oodla Wirra	Australia	Record daily precipitation	41.0 mm (1.6 in)	48 of 100 (Notable)
Cradock (Yednalue)	Australia	Record daily precipitation	29.6 mm (1.2 in)	48 of 100 (Notable)
Keyneton	Australia	Record daily precipitation	55.4 mm (2.2 in)	48 of 100 (Notable)
Paringa Lock V	Australia	Record daily precipitation	70.0 mm (2.8 in)	48 of 100 (Notable)
Tottington	Australia	Record daily precipitation	27.2 mm (1.1 in)	48 of 100 (Notable)
Bealiba	Australia	Record daily precipitation	34.0 mm (1.3 in)	48 of 100 (Notable)
Donegal 2 NW	United States	Record daily precipitation	50.8 mm (2.0 in)	48 of 100 (Notable)
Carrieton	Australia	Record daily precipitation	34.4 mm (1.4 in)	47 of 100 (Notable)
Caliph	Australia	Record daily precipitation	47.2 mm (1.9 in)	47 of 100 (Notable)
Longerenong	Australia	Record daily precipitation	45.0 mm (1.8 in)	47 of 100 (Notable)
Bower	Australia	Record daily precipitation	67.0 mm (2.6 in)	46 of 100 (Notable)
Nildottie	Australia	Record daily precipitation	49.0 mm (1.9 in)	46 of 100 (Notable)
Paruna	Australia	Record daily precipitation	40.2 mm (1.6 in)	46 of 100 (Notable)
Mildura Airport	Australia	Record daily precipitation	58.0 mm (2.3 in)	46 of 100 (Notable)
Wirrabara Forest	Australia	Record daily precipitation	48.8 mm (1.9 in)	45 of 100 (Notable)
Caltowie	Australia	Record daily precipitation	49.4 mm (1.9 in)	45 of 100 (Notable)
Clare (Calcannia)	Australia	Record daily precipitation	92.4 mm (3.6 in)	45 of 100 (Notable)

Counts by Type and Timescale

697 records

Records set or tied on 18 December 2011 by type: Highest daily maximum 119, Lowest daily maximum 64, Highest daily minimum 111, Lowest daily minimum 36, Heaviest daily rainfall 362, Heaviest daily snowfall 2, Deepest snow cover 3.

Records on 18 December 2011 by type
Record type	Records
Highest daily maximum	119
Lowest daily maximum	64
Highest daily minimum	111
Lowest daily minimum	36
Heaviest daily rainfall	362
Heaviest daily snowfall	2
Deepest snow cover	3

Records on 18 December 2011 by timescale: all-time 2, monthly 26, daily 669.

How Much Records Were Beaten By

579 broken records

Margins by which the 579 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 83.0. Ties are not counted.

Top 20 by Significance

18 December 2011

Top 20 records on 18 December 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 2011	Wentworth Post Office, AU	daily rain	72.6 mm (2.9 in)	43.6 mm (1.7 in)	104 years	80 of 100 (Exceptional)
18 December 2011	Moorook, AU	daily rain	58.6 mm (2.3 in)	33.2 mm (1.3 in)	104 years	77 of 100 (Major)
18 December 2011	Lake Victoria Storage, AU	daily rain	55.2 mm (2.2 in)	48.3 mm (1.9 in)	88 years	75 of 100 (Major)
18 December 2011	Renmark Irrigation, AU	daily rain	71.0 mm (2.8 in)	54.7 mm (2.2 in)	68 years	70 of 100 (Major)
18 December 2011	Pinnaroo, AU	daily rain	55.2 mm (2.2 in)	28.5 mm (1.1 in)	68 years	70 of 100 (Major)
18 December 2011	Warranooke (Glenorchy), AU	daily rain	37.2 mm (1.5 in)	23.7 mm (0.9 in)	108 years	67 of 100 (Major)
18 December 2011	Kingston on Murray, AU	daily rain	62.8 mm (2.5 in)	32.8 mm (1.3 in)	74 years	66 of 100 (Major)
18 December 2011	Penneshaw, AU	daily rain	36.6 mm (1.4 in)	15.8 mm (0.6 in)	88 years	64 of 100 (Major)
18 December 2011	Geranium, AU	daily rain	49.0 mm (1.9 in)	27.9 mm (1.1 in)	68 years	64 of 100 (Major)
18 December 2011	Black Hill, AU	daily rain	56.0 mm (2.2 in)	34.7 mm (1.4 in)	68 years	63 of 100 (Major)
18 December 2011	Nockatunga Station, AU	monthly rain	143.0 mm (5.6 in)	83.0 mm (3.3 in)	12 years	63 of 100 (Major)
18 December 2011	Murray Lock Number 9, AU	daily rain	40.0 mm (1.6 in)	31.4 mm (1.2 in)	68 years	63 of 100 (Major)
18 December 2011	Warracknabeal (Earlstan), AU	daily rain	52.0 mm (2.0 in)	40.3 mm (1.6 in)	44 years	63 of 100 (Major)
18 December 2011	Parrakie, AU	daily rain	46.2 mm (1.8 in)	24.1 mm (0.9 in)	68 years	62 of 100 (Major)
18 December 2011	Antwerp, AU	daily rain	37.5 mm (1.5 in)	16.9 mm (0.7 in)	108 years	62 of 100 (Major)
18 December 2011	Myponga, AU	daily rain	29.0 mm (1.1 in)	18.3 mm (0.7 in)	88 years	61 of 100 (Major)
18 December 2011	Rainbow (Werrap (Oak-Lea)), AU	daily rain	48.6 mm (1.9 in)	26.2 mm (1.0 in)	74 years	61 of 100 (Major)
18 December 2011	Loxton (Pyap), AU	daily rain	47.0 mm (1.9 in)	25.9 mm (1.0 in)	68 years	59 of 100 (Notable)
18 December 2011	Alawoona (Schells Well), AU	daily rain	44.0 mm (1.7 in)	21.9 mm (0.9 in)	68 years	59 of 100 (Notable)
18 December 2011	Beulah, AU	daily rain	49.0 mm (1.9 in)	30.2 mm (1.2 in)	74 years	59 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 2011

Records set or tied on this calendar date in each year from 1793 to 2011. 2011 had 697 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 2011-12-18: 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 20	509
20 to 40	56
40 to 60	12
60 to 80	1
80 to 100	1