Weather Records on 18 December 1999

923 weather records were set or tied worldwide on 18 December 1999. Highest significance: Brunette Downs, AU.

Key Facts for 18 December 1999

On 18 December 1999, 923 weather records were set or tied at long-record stations worldwide.
208 were record highs and 197 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 24 monthly and 897 daily.
Brunette Downs set a daily record precipitation of 85.0 mm (3.3 in) on 18 December 1999.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 477 records.

Record Map

923 stations

923 station records on 18 December 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 December 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Brunette Downs	Australia	Record daily precipitation	85.0 mm (3.3 in)	66 of 100 (Major)
Kassala	Sudan	Record daily precipitation	59.9 mm (2.4 in)	66 of 100 (Major)
Ufa	Russia	Record daily precipitation	25.3 mm (1.0 in)	55 of 100 (Notable)
Alni	Australia	Record daily precipitation	113.0 mm (4.4 in)	54 of 100 (Notable)
Karlsruhe	Germany	Record daily precipitation	44.4 mm (1.7 in)	54 of 100 (Notable)
Weribone	Australia	Record daily precipitation	50.0 mm (2.0 in)	52 of 100 (Notable)
Katoota	Australia	Record daily precipitation	48.0 mm (1.9 in)	51 of 100 (Notable)
Weinbiet	Germany	Record daily precipitation	48.1 mm (1.9 in)	50 of 100 (Notable)
Bartow 1SE	United States	Record daily precipitation	43.7 mm (1.7 in)	50 of 100 (Notable)
Elderslie	Australia	Record daily precipitation	104.4 mm (4.1 in)	49 of 100 (Notable)
Hattonvale Store	Australia	Record daily precipitation	55.9 mm (2.2 in)	48 of 100 (Notable)
Stuttgart-Stadt	Germany	Record daily precipitation	29.2 mm (1.1 in)	48 of 100 (Notable)
University of Queensland Gatto	Australia	Record daily precipitation	46.4 mm (1.8 in)	47 of 100 (Notable)
Marburg - Warrego Highway	Australia	Record daily precipitation	61.4 mm (2.4 in)	47 of 100 (Notable)
Stuttgart-Schnarrenberg	Germany	Record daily precipitation	30.7 mm (1.2 in)	47 of 100 (Notable)
Eppingen	Germany	Record daily precipitation	43.8 mm (1.7 in)	47 of 100 (Notable)
Vik I Sogn III	Norway	Record snow depth	50.0 cm (19.7 in)	47 of 100 (Notable)
Herbert Vale	Australia	Record daily precipitation	28.8 mm (1.1 in)	46 of 100 (Notable)
Lowood Don St	Australia	Record daily precipitation	35.2 mm (1.4 in)	46 of 100 (Notable)
Redland Bay Qld Uni Farm	Australia	Record daily precipitation	110.2 mm (4.3 in)	46 of 100 (Notable)
Obersulm-Willsbach	Germany	Record daily precipitation	38.0 mm (1.5 in)	46 of 100 (Notable)
Eppingen-Elsenz	Germany	Record daily precipitation	42.3 mm (1.7 in)	45 of 100 (Notable)
Kehl-Odelshofen	Germany	Record daily precipitation	41.5 mm (1.6 in)	45 of 100 (Notable)
Baden-Baden-Geroldsau	Germany	Record daily precipitation	55.7 mm (2.2 in)	45 of 100 (Notable)
Larrimah	Australia	Record daily precipitation	129.4 mm (5.1 in)	44 of 100 (Notable)
Gatton Allan Street	Australia	Record daily precipitation	55.4 mm (2.2 in)	44 of 100 (Notable)
Rosewood Walloon Rd	Australia	Record daily precipitation	56.0 mm (2.2 in)	44 of 100 (Notable)
Melbourne WFO	United States	Record daily precipitation	42.7 mm (1.7 in)	44 of 100 (Notable)
Heilbronn	Germany	Record daily precipitation	36.4 mm (1.4 in)	43 of 100 (Notable)
Oxenford (Oberon Way)	Australia	Record daily precipitation	53.0 mm (2.1 in)	42 of 100 (Notable)
Wallumbilla Post Office	Australia	Record daily precipitation	30.8 mm (1.2 in)	42 of 100 (Notable)
Woodlands	Australia	Record daily precipitation	49.0 mm (1.9 in)	42 of 100 (Notable)
Waghausel-Kirrlach	Germany	Record daily precipitation	36.8 mm (1.4 in)	42 of 100 (Notable)
Coleman	Germany	Record daily precipitation	26.7 mm (1.1 in)	42 of 100 (Notable)
Lake Alfred Exp STN	United States	Record daily precipitation	49.5 mm (1.9 in)	42 of 100 (Notable)
Koolburra	Australia	Record daily precipitation	106.2 mm (4.2 in)	41 of 100 (Notable)
Maroon	Australia	Record daily precipitation	40.0 mm (1.6 in)	41 of 100 (Notable)
Glenaven	Australia	Record daily precipitation	53.4 mm (2.1 in)	41 of 100 (Notable)
Cheriton	Australia	Record daily precipitation	39.2 mm (1.5 in)	41 of 100 (Notable)
Yuleba Garden St	Australia	Record daily precipitation	32.8 mm (1.3 in)	41 of 100 (Notable)
Medeiros Neto	Brazil	Record daily precipitation	68.0 mm (2.7 in)	41 of 100 (Notable)
Grandchester Symes St	Australia	Record daily precipitation	70.0 mm (2.8 in)	40 of 100 (Notable)
Normandy	Australia	Record daily precipitation	44.0 mm (1.7 in)	40 of 100 (Notable)
Airlie	Australia	Record daily precipitation	45.0 mm (1.8 in)	39 of 100 (Notable)
Gundy (Miller St)	Australia	Record daily precipitation	44.2 mm (1.7 in)	39 of 100 (Notable)
Munchen-Nymphenburg	Germany	Record daily precipitation	29.1 mm (1.1 in)	39 of 100 (Notable)
Winton Post Office	Australia	Record daily precipitation	36.2 mm (1.4 in)	38 of 100 (Notable)
Pforzheim-Eutingen	Germany	Record daily precipitation	29.9 mm (1.2 in)	38 of 100 (Notable)
Russleigh	Australia	Record daily precipitation	53.0 mm (2.1 in)	37 of 100 (Notable)
Hannaford Post Office	Australia	Record daily precipitation	41.0 mm (1.6 in)	37 of 100 (Notable)
Itapebi	Brazil	Record daily precipitation	118.4 mm (4.7 in)	37 of 100 (Notable)
Strasbourg-Entzheim	France	Record daily precipitation	26.2 mm (1.0 in)	37 of 100 (Notable)
Ebersberg-Halbing	Germany	Record daily precipitation	29.9 mm (1.2 in)	36 of 100 (Notable)
Dublin	United States	Record daily precipitation	43.2 mm (1.7 in)	36 of 100 (Notable)
Saint Paul Is AP	United States	Record low maximum temperature	-11.1 C (12.0 F)	36 of 100 (Notable)
Moogerah Dam	Australia	Record daily precipitation	55.0 mm (2.2 in)	35 of 100 (Notable)
Toogoolawah Post Office	Australia	Record daily precipitation	35.0 mm (1.4 in)	35 of 100 (Notable)
Tullochard	Australia	Record daily precipitation	42.0 mm (1.7 in)	35 of 100 (Notable)
Rheinau-Memprechtshofen	Germany	Record daily precipitation	47.0 mm (1.9 in)	35 of 100 (Notable)
Wolfach	Germany	Record daily precipitation	56.9 mm (2.2 in)	35 of 100 (Notable)

Counts by Type and Timescale

923 records

Records set or tied on 18 December 1999 by type: Highest daily maximum 99, Lowest daily maximum 81, Highest daily minimum 109, Lowest daily minimum 116, Heaviest daily rainfall 489, Heaviest daily snowfall 5, Deepest snow cover 24.

Records on 18 December 1999 by type
Record type	Records
Highest daily maximum	99
Lowest daily maximum	81
Highest daily minimum	109
Lowest daily minimum	116
Heaviest daily rainfall	489
Heaviest daily snowfall	5
Deepest snow cover	24

Records on 18 December 1999 by timescale: all-time 2, monthly 24, daily 897.

How Much Records Were Beaten By

784 broken records

Margins by which the 784 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 260.0. Ties are not counted.

Top 20 by Significance

18 December 1999

Top 20 records on 18 December 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 1999	Brunette Downs, AU	daily rain	85.0 mm (3.3 in)	61.9 mm (2.4 in)	54 years	66 of 100 (Major)
18 December 1999	Kassala, SD	monthly rain	59.9 mm (2.4 in)	59.9 mm (2.4 in)	42 years	66 of 100 (Major)
18 December 1999	Ufa, RU	daily rain	25.3 mm (1.0 in)	11.0 mm (0.4 in)	44 years	55 of 100 (Notable)
18 December 1999	Alni, AU	daily rain	113.0 mm (4.4 in)	86.4 mm (3.4 in)	21 years	54 of 100 (Notable)
18 December 1999	Karlsruhe, DE	daily rain	44.4 mm (1.7 in)	7.9 mm (0.31 in)	118 years	54 of 100 (Notable)
18 December 1999	Weribone, AU	daily rain	50.0 mm (2.0 in)	33.0 mm (1.3 in)	72 years	52 of 100 (Notable)
18 December 1999	Katoota, AU	daily rain	48.0 mm (1.9 in)	42.9 mm (1.7 in)	37 years	51 of 100 (Notable)
18 December 1999	Weinbiet, DE	monthly rain	48.1 mm (1.9 in)	11.9 mm (0.5 in)	5 years	50 of 100 (Notable)
18 December 1999	Bartow 1SE, US	daily rain	43.7 mm (1.7 in)	19.6 mm (0.8 in)	88 years	50 of 100 (Notable)
18 December 1999	Elderslie, AU	monthly rain	104.4 mm (4.1 in)	21.8 mm (0.9 in)	49 years	49 of 100 (Notable)
18 December 1999	Hattonvale Store, AU	daily rain	55.9 mm (2.2 in)	29.0 mm (1.1 in)	68 years	48 of 100 (Notable)
18 December 1999	Stuttgart-Stadt, DE	daily rain	29.2 mm (1.1 in)	9.3 mm (0.37 in)	50 years	48 of 100 (Notable)
18 December 1999	University of Queensland Gatto, AU	daily rain	46.4 mm (1.8 in)	14.9 mm (0.6 in)	92 years	47 of 100 (Notable)
18 December 1999	Marburg - Warrego Highway, AU	daily rain	61.4 mm (2.4 in)	25.1 mm (1.0 in)	70 years	47 of 100 (Notable)
18 December 1999	Stuttgart-Schnarrenberg, DE	daily rain	30.7 mm (1.2 in)	19.3 mm (0.8 in)	12 years	47 of 100 (Notable)
18 December 1999	Eppingen, DE	daily rain	43.8 mm (1.7 in)	20.3 mm (0.8 in)	12 years	47 of 100 (Notable)
18 December 1999	Vik I Sogn III, NO	daily snow depth	50.0 cm (19.7 in)	14.0 cm (5.5 in)	80 years	47 of 100 (Notable)
18 December 1999	Herbert Vale, AU	daily rain	28.8 mm (1.1 in)	14.6 mm (0.6 in)	92 years	46 of 100 (Notable)
18 December 1999	Lowood Don St, AU	daily rain	35.2 mm (1.4 in)	9.0 mm (0.35 in)	102 years	46 of 100 (Notable)
18 December 1999	Redland Bay Qld Uni Farm, AU	daily rain	110.2 mm (4.3 in)	72.0 mm (2.8 in)	16 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

1793 to 1999

Records set or tied on this calendar date in each year from 1793 to 1999. 1999 had 923 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 1999-12-18: 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	765
50 to 100	10
100 to 150	6
150 to 200	1
200 to 250	1
250 to 300	1