Weather Records on 18 December 1991

756 weather records were set or tied worldwide on 18 December 1991. Highest significance: Alamogordo, US.

Key Facts for 18 December 1991

On 18 December 1991, 756 weather records were set or tied at long-record stations worldwide.
226 were record highs and 85 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 10 monthly and 744 daily.
Alamogordo set a monthly record daily precipitation of 58.9 mm (2.3 in) on 18 December 1991.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 478 records.

Record Map

756 stations

756 station records on 18 December 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 December 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Alamogordo	United States	Record daily precipitation	58.9 mm (2.3 in)	72 of 100 (Major)
Pecos Nm	United States	Record daily snowfall	25.4 cm (10.0 in)	64 of 100 (Major)
Real del Monte	Mexico	Record daily precipitation	65.8 mm (2.6 in)	60 of 100 (Major)
San Marcos	United States	Record daily precipitation	92.2 mm (3.6 in)	56 of 100 (Notable)
Bulverde	United States	Record daily precipitation	100.3 mm (3.9 in)	52 of 100 (Notable)
Tilden 4 SSE	United States	Record daily precipitation	39.4 mm (1.6 in)	52 of 100 (Notable)
Gisborne	Australia	Record daily precipitation	25.0 mm (1.0 in)	50 of 100 (Notable)
Ixtlahuacan (Smn)	Mexico	Record daily precipitation	111.3 mm (4.4 in)	50 of 100 (Notable)
Lyons Falls	United States	Record daily snowfall	45.7 cm (18.0 in)	50 of 100 (Notable)
Hartbeespoort Dam (Irr)	South Africa	Record daily precipitation	41.0 mm (1.6 in)	49 of 100 (Notable)
St Arnaud	Australia	Record daily precipitation	25.0 mm (1.0 in)	48 of 100 (Notable)
Ballan	Australia	Record daily precipitation	27.4 mm (1.1 in)	48 of 100 (Notable)
Little River (Mount Rothwell)	Australia	Record daily precipitation	30.0 mm (1.2 in)	48 of 100 (Notable)
Morrisons (Ballark)	Australia	Record daily precipitation	29.2 mm (1.1 in)	47 of 100 (Notable)
Wedderburn (Post Office)	Australia	Record daily precipitation	31.6 mm (1.2 in)	46 of 100 (Notable)
Rio da Cidade	Brazil	Record daily precipitation	90.5 mm (3.6 in)	44 of 100 (Notable)
Forbes (Camp Street)	Australia	Record low maximum temperature	19.5 C (67.1 F)	43 of 100 (Notable)
Bungaree (Kirks Reservoir)	Australia	Record daily precipitation	30.0 mm (1.2 in)	43 of 100 (Notable)
Clunes	Australia	Record daily precipitation	27.0 mm (1.1 in)	43 of 100 (Notable)
Gage	United States	Record daily precipitation	30.5 mm (1.2 in)	43 of 100 (Notable)
Little River	Australia	Record daily precipitation	41.4 mm (1.6 in)	41 of 100 (Notable)
Newton Rigg	United Kingdom	Record daily precipitation	33.9 mm (1.3 in)	40 of 100 (Notable)
Bradford 4SW Rsch 5	United States	Record snow depth	68.6 cm (27.0 in)	40 of 100 (Notable)
Sonora	United States	Record high minimum temperature	11.1 C (52.0 F)	40 of 100 (Notable)
Fischers Store	United States	Record daily precipitation	54.1 mm (2.1 in)	39 of 100 (Notable)
Hico	United States	Record daily precipitation	30.5 mm (1.2 in)	39 of 100 (Notable)
N Creek 5 SE	United States	Record daily snowfall	10.2 cm (4.0 in)	38 of 100 (Notable)
Griffiss AFB	United States	Record low minimum temperature	-19.4 C (-2.9 F)	38 of 100 (Notable)
Luckhoff (Pol)	South Africa	Record daily precipitation	30.0 mm (1.2 in)	37 of 100 (Notable)
Great Sand Dunes Np & Preserve	United States	Record snow depth	43.2 cm (17.0 in)	37 of 100 (Notable)
Madison	United States	Record daily snowfall	20.3 cm (8.0 in)	37 of 100 (Notable)
Orono	United States	Record snow depth	17.8 cm (7.0 in)	37 of 100 (Notable)
Franklinville	United States	Record snow depth	50.8 cm (20.0 in)	37 of 100 (Notable)
Crowell	United States	Record daily precipitation	30.5 mm (1.2 in)	37 of 100 (Notable)
Melbourne Regional Office	Australia	Record low maximum temperature	14.9 C (58.8 F)	36 of 100 (Notable)
Orono	United States	Record low maximum temperature	-11.7 C (10.9 F)	36 of 100 (Notable)
Franklinville	United States	Record daily snowfall	20.3 cm (8.0 in)	36 of 100 (Notable)
Jacksboro	United States	Record daily precipitation	25.4 mm (1.0 in)	36 of 100 (Notable)
Addington	Australia	Record daily precipitation	28.6 mm (1.1 in)	35 of 100 (Notable)
Quitupan	Mexico	Record high maximum temperature	33.9 C (93.0 F)	35 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	25.7 mm (1.0 in)	35 of 100 (Notable)
Wharton	United States	Record daily precipitation	38.1 mm (1.5 in)	35 of 100 (Notable)
Melton Reservoir	Australia	Record daily precipitation	31.6 mm (1.2 in)	34 of 100 (Routine)
Lowestoft	United Kingdom	Record high maximum temperature	12.9 C (55.2 F)	34 of 100 (Routine)
Amherst	United States	Record daily snowfall	7.4 cm (2.9 in)	34 of 100 (Routine)
Hachita 1W	United States	Record high minimum temperature	6.7 C (44.1 F)	33 of 100 (Routine)
Searsburg STN	United States	Record daily snowfall	12.7 cm (5.0 in)	33 of 100 (Routine)
Ballarat Aerodrome	Australia	Record daily precipitation	25.0 mm (1.0 in)	32 of 100 (Routine)
Guayama 1SW	Puerto Rico [United States]	Record high minimum temperature	28.9 C (84.0 F)	32 of 100 (Routine)
San Simon	United States	Record high minimum temperature	7.2 C (45.0 F)	32 of 100 (Routine)
Hope	United States	Record daily snowfall	15.5 cm (6.1 in)	32 of 100 (Routine)
Deniliquin (Wilkinson St)	Australia	Record low maximum temperature	15.7 C (60.3 F)	31 of 100 (Routine)
Fazenda Sao Pedro	Brazil	Record daily precipitation	80.6 mm (3.2 in)	31 of 100 (Routine)
Klagetoh 12 WNW	United States	Record daily snowfall	10.2 cm (4.0 in)	31 of 100 (Routine)
Kalpowar Forestry	Australia	Record daily precipitation	29.0 mm (1.1 in)	30 of 100 (Routine)
Burkes Flat	Australia	Record daily precipitation	26.8 mm (1.1 in)	30 of 100 (Routine)
Meredith (Darra)	Australia	Record daily precipitation	32.2 mm (1.3 in)	30 of 100 (Routine)
Fazenda Sobradinho	Brazil	Record daily precipitation	43.4 mm (1.7 in)	30 of 100 (Routine)
Huixtla	Mexico	Record daily precipitation	32.8 mm (1.3 in)	30 of 100 (Routine)
Grand Marais	United States	Record snow depth	48.3 cm (19.0 in)	30 of 100 (Routine)

Counts by Type and Timescale

756 records

Records set or tied on 18 December 1991 by type: Highest daily maximum 101, Lowest daily maximum 51, Highest daily minimum 125, Lowest daily minimum 34, Heaviest daily rainfall 349, Heaviest daily snowfall 74, Deepest snow cover 22.

Records on 18 December 1991 by type
Record type	Records
Highest daily maximum	101
Lowest daily maximum	51
Highest daily minimum	125
Lowest daily minimum	34
Heaviest daily rainfall	349
Heaviest daily snowfall	74
Deepest snow cover	22

Records on 18 December 1991 by timescale: all-time 2, monthly 10, daily 744.

How Much Records Were Beaten By

660 broken records

Margins by which the 660 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 280.0. Ties are not counted.

Top 20 by Significance

18 December 1991

Top 20 records on 18 December 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 1991	Alamogordo, US	monthly rain	58.9 mm (2.3 in)	22.1 mm (0.9 in)	49 years	72 of 100 (Major)
18 December 1991	Pecos Nm, US	daily snowfall	25.4 cm (10.0 in)	25.4 cm (10.0 in)	74 years	64 of 100 (Major)
18 December 1991	Real del Monte, MX	daily rain	65.8 mm (2.6 in)	55.9 mm (2.2 in)	50 years	60 of 100 (Major)
18 December 1991	San Marcos, US	daily rain	92.2 mm (3.6 in)	75.7 mm (3.0 in)	25 years	56 of 100 (Notable)
18 December 1991	Bulverde, US	daily rain	100.3 mm (3.9 in)	84.3 mm (3.3 in)	25 years	52 of 100 (Notable)
18 December 1991	Tilden 4 SSE, US	daily rain	39.4 mm (1.6 in)	32.5 mm (1.3 in)	25 years	52 of 100 (Notable)
18 December 1991	Gisborne, AU	daily rain	25.0 mm (1.0 in)	9.5 mm (0.37 in)	103 years	50 of 100 (Notable)
18 December 1991	Ixtlahuacan (Smn), MX	monthly rain	111.3 mm (4.4 in)	45.5 mm (1.8 in)	28 years	50 of 100 (Notable)
18 December 1991	Lyons Falls, US	daily snowfall	45.7 cm (18.0 in)	25.4 cm (10.0 in)	36 years	50 of 100 (Notable)
18 December 1991	Hartbeespoort Dam (Irr), ZA	daily rain	41.0 mm (1.6 in)	21.7 mm (0.9 in)	77 years	49 of 100 (Notable)
18 December 1991	St Arnaud, AU	daily rain	25.0 mm (1.0 in)	5.9 mm (0.23 in)	103 years	48 of 100 (Notable)
18 December 1991	Ballan, AU	daily rain	27.4 mm (1.1 in)	7.3 mm (0.29 in)	109 years	48 of 100 (Notable)
18 December 1991	Little River (Mount Rothwell), AU	daily rain	30.0 mm (1.2 in)	12.7 mm (0.5 in)	88 years	48 of 100 (Notable)
18 December 1991	Morrisons (Ballark), AU	daily rain	29.2 mm (1.1 in)	18.0 mm (0.7 in)	53 years	47 of 100 (Notable)
18 December 1991	Wedderburn (Post Office), AU	daily rain	31.6 mm (1.2 in)	9.0 mm (0.35 in)	88 years	46 of 100 (Notable)
18 December 1991	Rio da Cidade, BR	daily rain	90.5 mm (3.6 in)	49.5 mm (1.9 in)	32 years	44 of 100 (Notable)
18 December 1991	Forbes (Camp Street), AU	daily low max	19.5 C (67.1 F)	1.6 C (2.9 F)	113 years	43 of 100 (Notable)
18 December 1991	Bungaree (Kirks Reservoir), AU	daily rain	30.0 mm (1.2 in)	3.3 mm (0.13 in)	103 years	43 of 100 (Notable)
18 December 1991	Clunes, AU	daily rain	27.0 mm (1.1 in)	16.6 mm (0.7 in)	54 years	43 of 100 (Notable)
18 December 1991	Gage, US	daily rain	30.5 mm (1.2 in)	7.6 mm (0.30 in)	76 years	43 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 1991

Records set or tied on this calendar date in each year from 1793 to 1991. 1991 had 756 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 1991-12-18: 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	620
50 to 100	28
100 to 150	4
150 to 200	5
200 to 250	0
250 to 300	3