Weather Records on 17 December 1963

531 weather records were set or tied worldwide on 17 December 1963. Highest significance: Eagle Harbor, US.

Key Facts for 17 December 1963

On 17 December 1963, 531 weather records were set or tied at long-record stations worldwide.
31 were record highs and 210 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 9 monthly and 520 daily.
Eagle Harbor set a daily record snowfall of 25.4 cm (10.0 in) on 17 December 1963.
Across 160 earlier years (1793 to 2025) the same calendar date averaged 463 records.

Record Map

531 stations

531 station records on 17 December 1963 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 December 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Eagle Harbor	United States	Record daily snowfall	25.4 cm (10.0 in)	56 of 100 (Notable)
Mount Wilson (Nooroo)	Australia	Record daily precipitation	49.5 mm (1.9 in)	54 of 100 (Notable)
Leura Post Office	Australia	Record daily precipitation	77.2 mm (3.0 in)	52 of 100 (Notable)
Bonfim	Brazil	Record daily precipitation	52.6 mm (2.1 in)	49 of 100 (Notable)
Missoula 6 NW WFO	United States	Record daily snowfall	22.6 cm (8.9 in)	49 of 100 (Notable)
Karkaralinsk	Kazakhstan	Record daily precipitation	52.0 mm (2.0 in)	44 of 100 (Notable)
Botany No.1 Dam	Australia	Record daily precipitation	50.8 mm (2.0 in)	43 of 100 (Notable)
Areia (Ufpb)	Brazil	Record daily precipitation	49.9 mm (2.0 in)	42 of 100 (Notable)
Patu	Brazil	Record daily precipitation	50.0 mm (2.0 in)	41 of 100 (Notable)
Parelhas (Dnocs)	Brazil	Record daily precipitation	66.0 mm (2.6 in)	41 of 100 (Notable)
Caetite	Brazil	Record daily precipitation	80.0 mm (3.1 in)	40 of 100 (Notable)
Katoomba (Murri St)	Australia	Record daily precipitation	63.5 mm (2.5 in)	38 of 100 (Notable)
Oxley Island (Lyndhurst)	Australia	Record daily precipitation	64.0 mm (2.5 in)	37 of 100 (Notable)
Wentworth Falls Post Office	Australia	Record daily precipitation	55.1 mm (2.2 in)	37 of 100 (Notable)
Pio IX (Patrocinio)	Brazil	Record daily precipitation	80.4 mm (3.2 in)	37 of 100 (Notable)
Farmington	United States	Record snow depth	12.7 cm (5.0 in)	37 of 100 (Notable)
Little Hartley (Sheepcombe)	Australia	Record daily precipitation	41.7 mm (1.6 in)	36 of 100 (Notable)
Avon Park 2 W	United States	Record daily precipitation	29.2 mm (1.1 in)	36 of 100 (Notable)
Flores (Dnocs)	Brazil	Record daily precipitation	75.2 mm (3.0 in)	34 of 100 (Routine)
Ashcroft	Canada	Record daily snowfall	11.4 cm (4.5 in)	34 of 100 (Routine)
Lodi	United States	Record low maximum temperature	3.3 C (37.9 F)	34 of 100 (Routine)
Saint Ignatius	United States	Record daily snowfall	16.8 cm (6.6 in)	34 of 100 (Routine)
Muskegon Co AP	United States	Record daily snowfall	37.6 cm (14.8 in)	34 of 100 (Routine)
Stewarts Brook Composite	Australia	Record daily precipitation	34.8 mm (1.4 in)	33 of 100 (Routine)
Col du Grand St-Bernard	Switzerland	Record low minimum temperature	-20.5 C (-4.9 F)	33 of 100 (Routine)
Skaneateles	United States	Record daily snowfall	17.8 cm (7.0 in)	33 of 100 (Routine)
Denman (Palace Street)	Australia	Record daily precipitation	52.8 mm (2.1 in)	32 of 100 (Routine)
Plashett	Australia	Record daily precipitation	43.2 mm (1.7 in)	32 of 100 (Routine)
Serra Talhada	Brazil	Record daily precipitation	75.8 mm (3.0 in)	32 of 100 (Routine)
Anadia	Brazil	Record daily precipitation	82.0 mm (3.2 in)	32 of 100 (Routine)
Saint Ignatius	United States	Record snow depth	35.6 cm (14.0 in)	32 of 100 (Routine)
Muscle Creek (Clendinning)	Australia	Record daily precipitation	38.6 mm (1.5 in)	31 of 100 (Routine)
Lawson (Wilson Street)	Australia	Record daily precipitation	40.1 mm (1.6 in)	31 of 100 (Routine)
Gresford Post Office	Australia	Record daily precipitation	52.1 mm (2.1 in)	30 of 100 (Routine)
Bilpin (Fern Grove)	Australia	Record daily precipitation	35.3 mm (1.4 in)	30 of 100 (Routine)
Campo Largo	Brazil	Record daily precipitation	80.8 mm (3.2 in)	30 of 100 (Routine)
Lichtentanne	Germany	Record snow depth	18.0 cm (7.1 in)	30 of 100 (Routine)
Rapelje	United States	Record daily snowfall	15.2 cm (6.0 in)	30 of 100 (Routine)
Kings Tablelands	Australia	Record daily precipitation	39.4 mm (1.6 in)	29 of 100 (Routine)
Sarajevo	Bosnia and Herzegovina	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Condeuba	Brazil	Record daily precipitation	108.0 mm (4.3 in)	29 of 100 (Routine)
Denair 3 NNE	United States	Record low maximum temperature	3.3 C (37.9 F)	29 of 100 (Routine)
Galesburg	United States	Record daily snowfall	8.1 cm (3.2 in)	29 of 100 (Routine)
Ogdensburg 4 NE	United States	Record snow depth	15.2 cm (6.0 in)	29 of 100 (Routine)
Beloit	United States	Record daily snowfall	6.4 cm (2.5 in)	29 of 100 (Routine)
Westwold	Canada	Record daily snowfall	10.7 cm (4.2 in)	28 of 100 (Routine)
Markovo	Russia	Record high minimum temperature	-5.5 C (22.1 F)	28 of 100 (Routine)
Fremont	United States	Record daily snowfall	6.4 cm (2.5 in)	28 of 100 (Routine)
Muswellbrook (Lower Hill St)	Australia	Record daily precipitation	33.8 mm (1.3 in)	27 of 100 (Routine)
Daroca	Spain	Record low maximum temperature	-5.0 C (23.0 F)	27 of 100 (Routine)
University	United States	Record low minimum temperature	-11.7 C (10.9 F)	27 of 100 (Routine)
Kirksville	United States	Record snow depth	12.7 cm (5.0 in)	27 of 100 (Routine)
Shelbyville	United States	Record daily snowfall	7.6 cm (3.0 in)	27 of 100 (Routine)
Alliance 1WNW	United States	Record low maximum temperature	-10.6 C (12.9 F)	27 of 100 (Routine)
Mamit Lake	Canada	Record daily snowfall	7.6 cm (3.0 in)	26 of 100 (Routine)
Evergreen	United States	Record low maximum temperature	5.0 C (41.0 F)	26 of 100 (Routine)
Le Grand	United States	Record low maximum temperature	3.9 C (39.0 F)	26 of 100 (Routine)
Pontotoc	United States	Record low minimum temperature	-10.6 C (12.9 F)	26 of 100 (Routine)
Liverpool	Australia	Record daily precipitation	36.8 mm (1.4 in)	25 of 100 (Routine)
Kamloops	Canada	Record daily snowfall	10.2 cm (4.0 in)	25 of 100 (Routine)

Counts by Type and Timescale

531 records

Records set or tied on 17 December 1963 by type: Highest daily maximum 11, Lowest daily maximum 132, Highest daily minimum 20, Lowest daily minimum 78, Heaviest daily rainfall 176, Heaviest daily snowfall 89, Deepest snow cover 25.

Records on 17 December 1963 by type
Record type	Records
Highest daily maximum	11
Lowest daily maximum	132
Highest daily minimum	20
Lowest daily minimum	78
Heaviest daily rainfall	176
Heaviest daily snowfall	89
Deepest snow cover	25

Records on 17 December 1963 by timescale: all-time 2, monthly 9, daily 520.

How Much Records Were Beaten By

412 broken records

Margins by which the 412 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 175.0. Ties are not counted.

Top 20 by Significance

17 December 1963

Top 20 records on 17 December 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 December 1963	Eagle Harbor, US	daily snowfall	25.4 cm (10.0 in)	15.2 cm (6.0 in)	48 years	56 of 100 (Notable)
17 December 1963	Mount Wilson (Nooroo), AU	daily rain	49.5 mm (1.9 in)	31.7 mm (1.2 in)	75 years	54 of 100 (Notable)
17 December 1963	Leura Post Office, AU	daily rain	77.2 mm (3.0 in)	56.4 mm (2.2 in)	36 years	52 of 100 (Notable)
17 December 1963	Bonfim, BR	daily rain	52.6 mm (2.1 in)	39.6 mm (1.6 in)	45 years	49 of 100 (Notable)
17 December 1963	Missoula 6 NW WFO, US	daily snowfall	22.6 cm (8.9 in)	17.5 cm (6.9 in)	8 years	49 of 100 (Notable)
17 December 1963	Karkaralinsk, KZ	daily rain	52.0 mm (2.0 in)	20.0 mm (0.8 in)	48 years	44 of 100 (Notable)
17 December 1963	Botany No.1 Dam, AU	daily rain	50.8 mm (2.0 in)	29.0 mm (1.1 in)	48 years	43 of 100 (Notable)
17 December 1963	Areia (Ufpb), BR	monthly rain	49.9 mm (2.0 in)	14.9 mm (0.6 in)	22 years	42 of 100 (Notable)
17 December 1963	Patu, BR	daily rain	50.0 mm (2.0 in)	45.4 mm (1.8 in)	45 years	41 of 100 (Notable)
17 December 1963	Parelhas (Dnocs), BR	daily rain	66.0 mm (2.6 in)	52.6 mm (2.1 in)	10 years	41 of 100 (Notable)
17 December 1963	Caetite, BR	daily rain	80.0 mm (3.1 in)	34.3 mm (1.4 in)	49 years	40 of 100 (Notable)
17 December 1963	Katoomba (Murri St), AU	daily rain	63.5 mm (2.5 in)	20.8 mm (0.8 in)	60 years	38 of 100 (Notable)
17 December 1963	Oxley Island (Lyndhurst), AU	daily rain	64.0 mm (2.5 in)	43.7 mm (1.7 in)	30 years	37 of 100 (Notable)
17 December 1963	Wentworth Falls Post Office, AU	daily rain	55.1 mm (2.2 in)	22.1 mm (0.9 in)	60 years	37 of 100 (Notable)
17 December 1963	Pio IX (Patrocinio), BR	monthly rain	80.4 mm (3.2 in)	12.4 mm (0.5 in)	48 years	37 of 100 (Notable)
17 December 1963	Farmington, US	daily snow depth	12.7 cm (5.0 in)	7.6 cm (3.0 in)	30 years	37 of 100 (Notable)
17 December 1963	Little Hartley (Sheepcombe), AU	daily rain	41.7 mm (1.6 in)	14.5 mm (0.6 in)	60 years	36 of 100 (Notable)
17 December 1963	Avon Park 2 W, US	daily rain	29.2 mm (1.1 in)	21.1 mm (0.8 in)	36 years	36 of 100 (Notable)
17 December 1963	Flores (Dnocs), BR	daily rain	75.2 mm (3.0 in)	44.1 mm (1.7 in)	16 years	34 of 100 (Routine)
17 December 1963	Ashcroft, CA	daily snowfall	11.4 cm (4.5 in)	6.1 cm (2.4 in)	50 years	34 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 1963

Records set or tied on this calendar date in each year from 1793 to 1963. 1963 had 531 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 1963-12-17: 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	355
25 to 50	33
50 to 75	13
75 to 100	6
100 to 125	3
125 to 150	0
150 to 175	2