Weather Records on 17 December 1966

516 weather records were set or tied worldwide on 17 December 1966. Highest significance: Sviland, NO.

Key Facts for 17 December 1966

On 17 December 1966, 516 weather records were set or tied at long-record stations worldwide.
259 were record highs and 88 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 13 monthly and 499 daily.
Sviland set a daily record precipitation of 76.7 mm (3.0 in) on 17 December 1966.
Across 160 earlier years (1793 to 2025) the same calendar date averaged 463 records.

Record Map

516 stations

516 station records on 17 December 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 December 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sviland	Norway	Record daily precipitation	76.7 mm (3.0 in)	65 of 100 (Major)
Bultfontein (Skl)	South Africa	Record daily precipitation	68.0 mm (2.7 in)	56 of 100 (Notable)
Geilo	Norway	Record daily precipitation	33.1 mm (1.3 in)	54 of 100 (Notable)
Ovre Sirdal	Norway	Record daily precipitation	62.5 mm (2.5 in)	54 of 100 (Notable)
Clifton Vale	South Africa	Record daily precipitation	100.5 mm (4.0 in)	50 of 100 (Notable)
Soyland I Gjesdal	Norway	Record daily precipitation	80.8 mm (3.2 in)	48 of 100 (Notable)
Sogndal - Selseng	Norway	Record daily precipitation	61.2 mm (2.4 in)	48 of 100 (Notable)
Bakke	Norway	Record daily precipitation	80.4 mm (3.2 in)	47 of 100 (Notable)
Beito	Norway	Record daily precipitation	30.0 mm (1.2 in)	46 of 100 (Notable)
Sand I Ryfylke II	Norway	Record daily precipitation	115.1 mm (4.5 in)	46 of 100 (Notable)
Lillydale	South Africa	Record daily precipitation	60.0 mm (2.4 in)	46 of 100 (Notable)
Stave Falls	Canada	Record daily precipitation	102.6 mm (4.0 in)	45 of 100 (Notable)
Boverdal	Norway	Record daily precipitation	29.8 mm (1.2 in)	45 of 100 (Notable)
Hovlandsdal	Norway	Record daily precipitation	137.5 mm (5.4 in)	45 of 100 (Notable)
Hafslo	Norway	Record daily precipitation	57.1 mm (2.2 in)	43 of 100 (Notable)
Myklebust I Breim	Norway	Record daily precipitation	70.4 mm (2.8 in)	43 of 100 (Notable)
Zwartruggens (Pol)	South Africa	Record daily precipitation	60.0 mm (2.4 in)	40 of 100 (Notable)
Alouette Lake	Canada	Record daily precipitation	114.8 mm (4.5 in)	39 of 100 (Notable)
Lysebotn	Norway	Record daily precipitation	117.3 mm (4.6 in)	39 of 100 (Notable)
Insizwa (Bos)	South Africa	Record daily precipitation	48.0 mm (1.9 in)	39 of 100 (Notable)
Hamelfontein	South Africa	Record daily precipitation	39.5 mm (1.6 in)	39 of 100 (Notable)
Donkerhoek-Rainhill	South Africa	Record daily precipitation	54.0 mm (2.1 in)	36 of 100 (Notable)
Atikokan Cli	Canada	Record daily snowfall	10.2 cm (4.0 in)	34 of 100 (Routine)
Bulken	Norway	Record daily precipitation	60.6 mm (2.4 in)	34 of 100 (Routine)
Garibaldi	Canada	Record daily precipitation	67.6 mm (2.7 in)	33 of 100 (Routine)
Pemberton Meadows	Canada	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Ignace	Canada	Record daily snowfall	12.7 cm (5.0 in)	31 of 100 (Routine)
Smithfield (Mun)	South Africa	Record daily precipitation	58.0 mm (2.3 in)	31 of 100 (Routine)
Kroonplaats	South Africa	Record daily precipitation	38.5 mm (1.5 in)	30 of 100 (Routine)
Brockport	United States	Record high maximum temperature	15.6 C (60.1 F)	30 of 100 (Routine)
Vik I Sogn III	Norway	Record daily precipitation	42.0 mm (1.7 in)	29 of 100 (Routine)
Hughenden	South Africa	Record daily precipitation	28.5 mm (1.1 in)	29 of 100 (Routine)
Leeuwfontein	South Africa	Record daily precipitation	46.0 mm (1.8 in)	29 of 100 (Routine)
Westfield 2 SSE	United States	Record high maximum temperature	9.4 C (48.9 F)	29 of 100 (Routine)
Gloria	Brazil	Record daily precipitation	83.5 mm (3.3 in)	28 of 100 (Routine)
Hornindal	Norway	Record daily precipitation	44.2 mm (1.7 in)	28 of 100 (Routine)
Ekaterinburg	Russia	Record low maximum temperature	-29.4 C (-20.9 F)	28 of 100 (Routine)
Twyfelspoort	South Africa	Record daily precipitation	36.5 mm (1.4 in)	28 of 100 (Routine)
Northwood	United States	Record high minimum temperature	0.6 C (33.1 F)	28 of 100 (Routine)
Zumbrota	United States	Record high minimum temperature	0.0 C (32.0 F)	28 of 100 (Routine)
Oconto 4 W	United States	Record high minimum temperature	1.1 C (34.0 F)	28 of 100 (Routine)
Victoria Gonzales Hts	Canada	Record high minimum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Achinsk	Russia	Record low maximum temperature	-42.1 C (-43.8 F)	27 of 100 (Routine)
Harnosand	Sweden	Record daily precipitation	30.3 mm (1.2 in)	27 of 100 (Routine)
Farmington 3NW	United States	Record high minimum temperature	-0.6 C (30.9 F)	27 of 100 (Routine)
Cowichan Bay Cherry Point	Canada	Record high maximum temperature	12.2 C (54.0 F)	26 of 100 (Routine)
Roodepoort	South Africa	Record daily precipitation	28.5 mm (1.1 in)	26 of 100 (Routine)
Nylsvley	South Africa	Record daily precipitation	32.5 mm (1.3 in)	26 of 100 (Routine)
Salique (Bos)	South Africa	Record daily precipitation	89.5 mm (3.5 in)	26 of 100 (Routine)
Marshalltown	United States	Record high minimum temperature	1.1 C (34.0 F)	26 of 100 (Routine)
Osage	United States	Record high minimum temperature	0.0 C (32.0 F)	26 of 100 (Routine)
Ft Meade	United States	Record high minimum temperature	3.3 C (37.9 F)	26 of 100 (Routine)
Coupeville 1 S	United States	Record high minimum temperature	8.9 C (48.0 F)	26 of 100 (Routine)
Kokpekty	Kazakhstan	Record low maximum temperature	-29.0 C (-20.2 F)	25 of 100 (Routine)
Tisul	Russia	Record low maximum temperature	-41.8 C (-43.2 F)	25 of 100 (Routine)
Grundy Ctr	United States	Record high minimum temperature	1.7 C (35.1 F)	25 of 100 (Routine)
New Hampton	United States	Record high minimum temperature	0.6 C (33.1 F)	25 of 100 (Routine)
Windom	United States	Record high minimum temperature	-0.6 C (30.9 F)	25 of 100 (Routine)
James Island	Canada	Record high minimum temperature	8.9 C (48.0 F)	24 of 100 (Routine)
Etne	Norway	Record daily precipitation	55.8 mm (2.2 in)	24 of 100 (Routine)

Counts by Type and Timescale

516 records

Records set or tied on 17 December 1966 by type: Highest daily maximum 57, Lowest daily maximum 40, Highest daily minimum 202, Lowest daily minimum 48, Heaviest daily rainfall 155, Heaviest daily snowfall 7, Deepest snow cover 7.

Records on 17 December 1966 by type
Record type	Records
Highest daily maximum	57
Lowest daily maximum	40
Highest daily minimum	202
Lowest daily minimum	48
Heaviest daily rainfall	155
Heaviest daily snowfall	7
Deepest snow cover	7

Records on 17 December 1966 by timescale: all-time 4, monthly 13, daily 499.

How Much Records Were Beaten By

398 broken records

Margins by which the 398 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 180.0. Ties are not counted.

Top 20 by Significance

17 December 1966

Top 20 records on 17 December 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 December 1966	Sviland, NO	daily rain	76.7 mm (3.0 in)	46.5 mm (1.8 in)	61 years	65 of 100 (Major)
17 December 1966	Bultfontein (Skl), ZA	daily rain	68.0 mm (2.7 in)	47.7 mm (1.9 in)	52 years	56 of 100 (Notable)
17 December 1966	Geilo, NO	daily rain	33.1 mm (1.3 in)	15.0 mm (0.6 in)	33 years	54 of 100 (Notable)
17 December 1966	Ovre Sirdal, NO	daily rain	62.5 mm (2.5 in)	48.6 mm (1.9 in)	36 years	54 of 100 (Notable)
17 December 1966	Clifton Vale, ZA	all-time rain	100.5 mm (4.0 in)	23.5 mm (0.9 in)	9 years	50 of 100 (Notable)
17 December 1966	Soyland I Gjesdal, NO	daily rain	80.8 mm (3.2 in)	34.8 mm (1.4 in)	55 years	48 of 100 (Notable)
17 December 1966	Sogndal - Selseng, NO	monthly rain	61.2 mm (2.4 in)	10.4 mm (0.4 in)	68 years	48 of 100 (Notable)
17 December 1966	Bakke, NO	daily rain	80.4 mm (3.2 in)	33.1 mm (1.3 in)	55 years	47 of 100 (Notable)
17 December 1966	Beito, NO	daily rain	30.0 mm (1.2 in)	13.2 mm (0.5 in)	20 years	46 of 100 (Notable)
17 December 1966	Sand I Ryfylke II, NO	daily rain	115.1 mm (4.5 in)	49.0 mm (1.9 in)	33 years	46 of 100 (Notable)
17 December 1966	Lillydale, ZA	daily rain	60.0 mm (2.4 in)	40.9 mm (1.6 in)	13 years	46 of 100 (Notable)
17 December 1966	Stave Falls, CA	daily rain	102.6 mm (4.0 in)	39.4 mm (1.6 in)	47 years	45 of 100 (Notable)
17 December 1966	Boverdal, NO	daily rain	29.8 mm (1.2 in)	14.4 mm (0.6 in)	0 years	45 of 100 (Notable)
17 December 1966	Hovlandsdal, NO	daily rain	137.5 mm (5.4 in)	38.7 mm (1.5 in)	65 years	45 of 100 (Notable)
17 December 1966	Hafslo, NO	daily rain	57.1 mm (2.2 in)	26.1 mm (1.0 in)	12 years	43 of 100 (Notable)
17 December 1966	Myklebust I Breim, NO	monthly rain	70.4 mm (2.8 in)	8.7 mm (0.34 in)	61 years	43 of 100 (Notable)
17 December 1966	Zwartruggens (Pol), ZA	daily rain	60.0 mm (2.4 in)	26.2 mm (1.0 in)	52 years	40 of 100 (Notable)
17 December 1966	Alouette Lake, CA	daily rain	114.8 mm (4.5 in)	45.2 mm (1.8 in)	35 years	39 of 100 (Notable)
17 December 1966	Lysebotn, NO	daily rain	117.3 mm (4.6 in)	34.9 mm (1.4 in)	33 years	39 of 100 (Notable)
17 December 1966	Insizwa (Bos), ZA	daily rain	48.0 mm (1.9 in)	25.6 mm (1.0 in)	36 years	39 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 1966

Records set or tied on this calendar date in each year from 1793 to 1966. 1966 had 516 records.

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

Records on 12-17 in each year
Year	Records
1793	2
1796	1
1806	2
1808	2
1814	1
1815	1
1839	1
1845	1
1846	4
1847	1
1848	1
1859	3
1866	1
1867	1
1868	1
1869	2
1873	2
1876	3
1877	2
1878	1
1879	2
1881	2
1885	1
1886	1
1888	2
1889	2
1890	4
1892	4
1893	2
1894	4
1895	3
1896	4
1897	4
1898	2
1899	1
1900	6
1901	5
1902	47
1903	2
1904	14
1905	2
1906	17
1907	9
1908	13
1909	5
1910	37
1911	12
1912	15
1913	21
1914	17
1915	31
1916	21
1917	21
1918	21
1919	109
1920	97
1921	94
1922	120
1923	170
1924	505
1925	79
1926	172
1927	143
1928	359
1929	221
1930	362
1931	217
1932	684
1933	710
1934	200
1935	87
1936	504
1937	379
1938	118
1939	1,126
1940	248
1941	261
1942	507
1943	444
1944	189
1945	621
1946	207
1947	258
1948	316
1949	296
1950	294
1951	773
1952	277
1953	283
1954	409
1955	419
1956	448
1957	686
1958	540
1959	548
1960	492
1961	911
1962	676
1963	531
1964	1,239
1965	482
1966	516
1967	1,121
1968	338
1969	238
1970	820
1971	781
1972	601
1973	1,016
1974	390
1975	474
1976	507
1977	1,024
1978	710
1979	951
1980	1,116
1981	1,354
1982	569
1983	1,264
1984	1,618
1985	1,210
1986	743
1987	1,191
1988	481
1989	2,905
1990	866
1991	577
1992	1,461
1993	761
1994	685
1995	956
1996	1,212
1997	1,279
1998	695
1999	901
2000	1,566
2001	1,262
2002	858
2003	751
2004	554
2005	806
2006	1,307
2007	1,100
2008	1,354
2009	926
2010	1,405
2011	430
2012	942
2013	718
2014	370
2015	1,378
2016	1,521
2017	408
2018	498
2019	917
2020	768
2021	908
2022	595
2023	931
2024	560
2025	1,198

Download the Data

Data for records on 1966-12-17: 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 25	370
25 to 50	23
50 to 75	4
75 to 100	0
100 to 125	0
125 to 150	0
150 to 175	0
175 to 200	1