Weather Records on 18 December 1966

644 weather records were set or tied worldwide on 18 December 1966. Highest significance: Jeremoabo, BR.

Key Facts for 18 December 1966

On 18 December 1966, 644 weather records were set or tied at long-record stations worldwide.
380 were record highs and 98 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 20 monthly and 621 daily.
Jeremoabo set an all-time record daily precipitation of 150.0 mm (5.9 in) on 18 December 1966.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 479 records.

Record Map

644 stations

644 station records on 18 December 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 December 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Jeremoabo	Brazil	Record daily precipitation	150.0 mm (5.9 in)	58 of 100 (Notable)
Francistown	Botswana	Record daily precipitation	104.2 mm (4.1 in)	51 of 100 (Notable)
Modderrivier (Pol)	South Africa	Record daily precipitation	55.0 mm (2.2 in)	46 of 100 (Notable)
Heritage	South Africa	Record daily precipitation	101.5 mm (4.0 in)	44 of 100 (Notable)
Maristova	Norway	Record daily precipitation	37.5 mm (1.5 in)	43 of 100 (Notable)
Triunfo	Brazil	Record daily precipitation	67.3 mm (2.6 in)	40 of 100 (Notable)
Bokfontein	South Africa	Record daily precipitation	39.0 mm (1.5 in)	40 of 100 (Notable)
Holmogadd A	Sweden	Record daily precipitation	29.2 mm (1.1 in)	40 of 100 (Notable)
Harnosand	Sweden	Record daily precipitation	52.9 mm (2.1 in)	39 of 100 (Notable)
Jacobina	Brazil	Record daily precipitation	63.2 mm (2.5 in)	36 of 100 (Notable)
Kokpekty	Kazakhstan	Record low maximum temperature	-33.0 C (-27.4 F)	35 of 100 (Notable)
Excelsior (Mun)	South Africa	Record daily precipitation	67.0 mm (2.6 in)	35 of 100 (Notable)
Bar Harbor 3 NW	United States	Record high minimum temperature	4.4 C (39.9 F)	35 of 100 (Notable)
Groenvlei (Skl)	South Africa	Record daily precipitation	58.0 mm (2.3 in)	34 of 100 (Routine)
Senhor Do Bonfim	Brazil	Record daily precipitation	68.4 mm (2.7 in)	33 of 100 (Routine)
Verma	Norway	Record daily precipitation	31.9 mm (1.3 in)	33 of 100 (Routine)
Northfield	United States	Record high minimum temperature	1.7 C (35.1 F)	33 of 100 (Routine)
Irara	Brazil	Record daily precipitation	61.1 mm (2.4 in)	32 of 100 (Routine)
McKinley Park	United States	Record daily snowfall	20.3 cm (8.0 in)	32 of 100 (Routine)
Coldwater	United States	Record high maximum temperature	18.3 C (64.9 F)	31 of 100 (Routine)
Setauket Strong	United States	Record high maximum temperature	14.4 C (57.9 F)	31 of 100 (Routine)
Sandy Cape Lighthouse	Australia	Record daily precipitation	37.8 mm (1.5 in)	30 of 100 (Routine)
Glen St Mary 1 W	United States	Record daily precipitation	42.7 mm (1.7 in)	30 of 100 (Routine)
Cooperstown	United States	Record high maximum temperature	11.1 C (52.0 F)	30 of 100 (Routine)
Ogdensburg 4 NE	United States	Record high minimum temperature	2.8 C (37.0 F)	30 of 100 (Routine)
Poughkeepsie	United States	Record high maximum temperature	11.7 C (53.1 F)	30 of 100 (Routine)
Double Island Point Lighthouse	Australia	Record daily precipitation	58.2 mm (2.3 in)	29 of 100 (Routine)
Ness City	United States	Record high maximum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Norwich	United States	Record high maximum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Parrsboro	Canada	Record high minimum temperature	2.8 C (37.0 F)	28 of 100 (Routine)
Pretoria-New Cemetry	South Africa	Record daily precipitation	35.5 mm (1.4 in)	28 of 100 (Routine)
Weston	United States	Record high minimum temperature	2.2 C (36.0 F)	28 of 100 (Routine)
Grafton	United States	Record high maximum temperature	8.9 C (48.0 F)	28 of 100 (Routine)
Milagres	Brazil	Record daily precipitation	58.4 mm (2.3 in)	27 of 100 (Routine)
Victoria Gonzales Hts	Canada	Record high minimum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Quatsino	Canada	Record high minimum temperature	6.7 C (44.1 F)	27 of 100 (Routine)
Lordsburg 4 SE	United States	Record low minimum temperature	-8.9 C (16.0 F)	27 of 100 (Routine)
Petropavlovsk	Kazakhstan	Record low maximum temperature	-29.8 C (-21.6 F)	26 of 100 (Routine)
La Piedad de Cabadas (Dge)	Mexico	Record low minimum temperature	-1.1 C (30.0 F)	26 of 100 (Routine)
Mayaguez City	Puerto Rico [United States]	Record high minimum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Tatarsk	Russia	Record low minimum temperature	-40.8 C (-41.4 F)	26 of 100 (Routine)
Slavgorod	Russia	Record low maximum temperature	-39.5 C (-39.1 F)	26 of 100 (Routine)
Franklin	United States	Record high maximum temperature	10.6 C (51.1 F)	26 of 100 (Routine)
Plattsburgh AFB	United States	Record high minimum temperature	0.0 C (32.0 F)	26 of 100 (Routine)
Maryborough	Australia	Record daily precipitation	47.5 mm (1.9 in)	25 of 100 (Routine)
Hedley	Canada	Record high minimum temperature	2.8 C (37.0 F)	25 of 100 (Routine)
Swan River	Canada	Record high maximum temperature	0.6 C (33.1 F)	25 of 100 (Routine)
San Luis de la Paz	Mexico	Record low minimum temperature	-2.8 C (27.0 F)	25 of 100 (Routine)
Howard 2SE	United States	Record high maximum temperature	20.6 C (69.1 F)	25 of 100 (Routine)
Beerwah Forest	Australia	Record daily precipitation	51.8 mm (2.0 in)	24 of 100 (Routine)
Ipira (Camisao)	Brazil	Record daily precipitation	58.0 mm (2.3 in)	24 of 100 (Routine)
Steveston	Canada	Record high minimum temperature	8.9 C (48.0 F)	24 of 100 (Routine)
Emerson	Canada	Record daily snowfall	12.7 cm (5.0 in)	24 of 100 (Routine)
Rietfontein (Skl)	South Africa	Record daily precipitation	30.0 mm (1.2 in)	24 of 100 (Routine)
Enzelberg	South Africa	Record daily precipitation	60.0 mm (2.4 in)	24 of 100 (Routine)
Cream Hill	United States	Record high minimum temperature	2.8 C (37.0 F)	24 of 100 (Routine)
Abilene	United States	Record high maximum temperature	17.8 C (64.0 F)	24 of 100 (Routine)
Fall River	United States	Record high minimum temperature	5.6 C (42.1 F)	24 of 100 (Routine)
Dannemora	United States	Record high minimum temperature	1.7 C (35.1 F)	24 of 100 (Routine)
Tupper Lake Sunmount	United States	Record high minimum temperature	0.6 C (33.1 F)	24 of 100 (Routine)

Counts by Type and Timescale

644 records

Records set or tied on 18 December 1966 by type: Highest daily maximum 169, Lowest daily maximum 46, Highest daily minimum 211, Lowest daily minimum 52, Heaviest daily rainfall 155, Heaviest daily snowfall 9, Deepest snow cover 2.

Records on 18 December 1966 by type
Record type	Records
Highest daily maximum	169
Lowest daily maximum	46
Highest daily minimum	211
Lowest daily minimum	52
Heaviest daily rainfall	155
Heaviest daily snowfall	9
Deepest snow cover	2

Records on 18 December 1966 by timescale: all-time 3, monthly 20, daily 621.

How Much Records Were Beaten By

505 broken records

Margins by which the 505 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 152.0. Ties are not counted.

Top 20 by Significance

18 December 1966

Top 20 records on 18 December 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 1966	Jeremoabo, BR	all-time rain	150.0 mm (5.9 in)	46.8 mm (1.8 in)	2 years	58 of 100 (Notable)
18 December 1966	Francistown, BW	monthly rain	104.2 mm (4.1 in)	36.1 mm (1.4 in)	25 years	51 of 100 (Notable)
18 December 1966	Modderrivier (Pol), ZA	daily rain	55.0 mm (2.2 in)	44.1 mm (1.7 in)	16 years	46 of 100 (Notable)
18 December 1966	Heritage, ZA	all-time rain	101.5 mm (4.0 in)	12.1 mm (0.5 in)	32 years	44 of 100 (Notable)
18 December 1966	Maristova, NO	monthly rain	37.5 mm (1.5 in)	10.2 mm (0.4 in)	8 years	43 of 100 (Notable)
18 December 1966	Triunfo, BR	daily rain	67.3 mm (2.6 in)	56.8 mm (2.2 in)	12 years	40 of 100 (Notable)
18 December 1966	Bokfontein, ZA	daily rain	39.0 mm (1.5 in)	23.3 mm (0.9 in)	45 years	40 of 100 (Notable)
18 December 1966	Holmogadd A, SE	monthly rain	29.2 mm (1.1 in)	3.9 mm (0.15 in)	41 years	40 of 100 (Notable)
18 December 1966	Harnosand, SE	monthly rain	52.9 mm (2.1 in)	9.9 mm (0.39 in)	4 years	39 of 100 (Notable)
18 December 1966	Jacobina, BR	daily rain	63.2 mm (2.5 in)	41.9 mm (1.6 in)	20 years	36 of 100 (Notable)
18 December 1966	Kokpekty, KZ	daily low max	-33.0 C (-27.4 F)	9.1 C (16.4 F)	55 years	35 of 100 (Notable)
18 December 1966	Excelsior (Mun), ZA	daily rain	67.0 mm (2.6 in)	34.5 mm (1.4 in)	5 years	35 of 100 (Notable)
18 December 1966	Bar Harbor 3 NW, US	daily high min	4.4 C (39.9 F)	5.5 C (9.9 F)	66 years	35 of 100 (Notable)
18 December 1966	Groenvlei (Skl), ZA	daily rain	58.0 mm (2.3 in)	35.1 mm (1.4 in)	20 years	34 of 100 (Routine)
18 December 1966	Senhor Do Bonfim, BR	daily rain	68.4 mm (2.7 in)	30.7 mm (1.2 in)	28 years	33 of 100 (Routine)
18 December 1966	Verma, NO	daily rain	31.9 mm (1.3 in)	7.0 mm (0.28 in)	61 years	33 of 100 (Routine)
18 December 1966	Northfield, US	daily high min	1.7 C (35.1 F)	1.7 C (3.1 F)	76 years	33 of 100 (Routine)
18 December 1966	Irara, BR	daily rain	61.1 mm (2.4 in)	39.7 mm (1.6 in)	12 years	32 of 100 (Routine)
18 December 1966	McKinley Park, US	daily snowfall	20.3 cm (8.0 in)	15.2 cm (6.0 in)	24 years	32 of 100 (Routine)
18 December 1966	Coldwater, US	daily high max	18.3 C (64.9 F)	2.2 C (4.0 F)	72 years	31 of 100 (Routine)

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 1966

Records set or tied on this calendar date in each year from 1793 to 1966. 1966 had 644 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 1966-12-18: 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 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 20	479
20 to 40	19
40 to 60	4
60 to 80	2
80 to 100	0
100 to 120	0
120 to 140	0
140 to 160	1