Weather Records on 20 December 1964

499 weather records were set or tied worldwide on 20 December 1964. Highest significance: Redmond 2 W, US.

Key Facts for 20 December 1964

On 20 December 1964, 499 weather records were set or tied at long-record stations worldwide.
45 were record highs and 108 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 26 monthly and 473 daily.
Redmond 2 W set a daily record snowfall of 15.2 cm (6.0 in) on 20 December 1964.
Across 163 earlier years (1793 to 2025) the same calendar date averaged 467 records.

Record Map

499 stations

499 station records on 20 December 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 December 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Redmond 2 W	United States	Record daily snowfall	15.2 cm (6.0 in)	60 of 100 (Major)
Three Lynx	United States	Record daily snowfall	45.7 cm (18.0 in)	57 of 100 (Notable)
Three Lynx	United States	Record snow depth	58.4 cm (23.0 in)	57 of 100 (Notable)
Glen Warren	Australia	Record daily precipitation	29.2 mm (1.1 in)	55 of 100 (Notable)
Anatone	United States	Record daily snowfall	25.4 cm (10.0 in)	53 of 100 (Notable)
Haskins Dam	United States	Record daily snowfall	55.9 cm (22.0 in)	51 of 100 (Notable)
Cape St James	Canada	Record daily snowfall	12.7 cm (5.0 in)	50 of 100 (Notable)
Minnedosa	Canada	Record daily snowfall	12.7 cm (5.0 in)	50 of 100 (Notable)
Anatone	United States	Record daily precipitation	38.1 mm (1.5 in)	50 of 100 (Notable)
Everett	United States	Record daily snowfall	11.4 cm (4.5 in)	50 of 100 (Notable)
Forks 1 E	United States	Record snow depth	17.8 cm (7.0 in)	50 of 100 (Notable)
Missoula 6 NW WFO	United States	Record daily snowfall	18.3 cm (7.2 in)	49 of 100 (Notable)
Bend	United States	Record snow depth	27.9 cm (11.0 in)	49 of 100 (Notable)
Birtle	Canada	Record daily snowfall	13.5 cm (5.3 in)	48 of 100 (Notable)
Lake 2 N	United States	Record daily precipitation	26.4 mm (1.0 in)	48 of 100 (Notable)
Grouse	United States	Record daily snowfall	35.6 cm (14.0 in)	45 of 100 (Notable)
Blaine	United States	Record daily snowfall	7.6 cm (3.0 in)	44 of 100 (Notable)
Fossil	United States	Record daily snowfall	15.2 cm (6.0 in)	43 of 100 (Notable)
Milan	Italy	Record high minimum temperature	8.7 C (47.7 F)	42 of 100 (Notable)
Enterprise Rs	United States	Record daily snowfall	14.2 cm (5.6 in)	42 of 100 (Notable)
Ceylon	Canada	Record daily snowfall	7.6 cm (3.0 in)	41 of 100 (Notable)
Soledad de Doblado	Mexico	Record daily precipitation	26.9 mm (1.1 in)	41 of 100 (Notable)
Bend	United States	Record daily snowfall	21.8 cm (8.6 in)	41 of 100 (Notable)
Detroit	United States	Record daily snowfall	17.8 cm (7.0 in)	39 of 100 (Notable)
Russell	Canada	Record daily snowfall	7.6 cm (3.0 in)	37 of 100 (Notable)
Tororo	Uganda	Record daily precipitation	43.1 mm (1.7 in)	37 of 100 (Notable)
Iowa Hill	United States	Record daily precipitation	62.5 mm (2.5 in)	35 of 100 (Notable)
Oxnard	United States	Record daily precipitation	113.0 mm (4.4 in)	35 of 100 (Notable)
Manistique Wwtp	United States	Record daily snowfall	31.0 cm (12.2 in)	35 of 100 (Notable)
Portland Rfc City	United States	Record snow depth	17.8 cm (7.0 in)	35 of 100 (Notable)
Cascade 5 S	United States	Record daily snowfall	9.7 cm (3.8 in)	34 of 100 (Routine)
East Anaconda	United States	Record daily snowfall	20.3 cm (8.0 in)	34 of 100 (Routine)
Lake Yellowstone	United States	Record daily snowfall	38.1 cm (15.0 in)	34 of 100 (Routine)
Hana 354	United States	Record daily precipitation	108.0 mm (4.3 in)	34 of 100 (Routine)
Manjimup	Australia	Record daily precipitation	31.8 mm (1.3 in)	33 of 100 (Routine)
Superior	United States	Record daily snowfall	15.2 cm (6.0 in)	33 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record low minimum temperature	5.8 C (42.4 F)	32 of 100 (Routine)
Calgary Int'l A	Canada	Record low maximum temperature	-25.0 C (-13.0 F)	32 of 100 (Routine)
Medicine Hat A	Canada	Record low maximum temperature	-21.7 C (-7.1 F)	32 of 100 (Routine)
Whitewood	Canada	Record daily snowfall	7.6 cm (3.0 in)	32 of 100 (Routine)
Illawarra	South Africa	Record daily precipitation	46.0 mm (1.8 in)	32 of 100 (Routine)
Hood Rvr Exp STN	United States	Record daily snowfall	30.5 cm (12.0 in)	32 of 100 (Routine)
Kalama 5 ENE	United States	Record daily snowfall	7.6 cm (3.0 in)	32 of 100 (Routine)
Drummonds	Australia	Record daily precipitation	48.3 mm (1.9 in)	31 of 100 (Routine)
Ojai	United States	Record daily precipitation	78.7 mm (3.1 in)	30 of 100 (Routine)
Lind 3 NE	United States	Record snow depth	22.9 cm (9.0 in)	30 of 100 (Routine)
Ventura	United States	Record daily precipitation	62.7 mm (2.5 in)	29 of 100 (Routine)
Grenfell	Canada	Record daily snowfall	5.1 cm (2.0 in)	28 of 100 (Routine)
Garden Valley	United States	Record high maximum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Vernonia	United States	Record low maximum temperature	1.1 C (34.0 F)	28 of 100 (Routine)
Mount Stuart	Australia	Record daily precipitation	29.0 mm (1.1 in)	27 of 100 (Routine)
Mbarara	Uganda	Record daily precipitation	26.7 mm (1.1 in)	27 of 100 (Routine)
Rockport 1 ESE	United States	Record daily snowfall	10.2 cm (4.0 in)	27 of 100 (Routine)
Boonton 1 SE	United States	Record daily snowfall	6.4 cm (2.5 in)	27 of 100 (Routine)
Hood Rvr Exp STN	United States	Record snow depth	35.6 cm (14.0 in)	27 of 100 (Routine)
Milton Freewater	United States	Record daily snowfall	7.6 cm (3.0 in)	27 of 100 (Routine)
Prospect 2 SW	United States	Record daily precipitation	35.1 mm (1.4 in)	27 of 100 (Routine)
Three Lynx	United States	Record low minimum temperature	-7.8 C (18.0 F)	27 of 100 (Routine)
Gleichen	Canada	Record low maximum temperature	-26.7 C (-16.1 F)	26 of 100 (Routine)
Telluride 4WNW	United States	Record snow depth	48.3 cm (19.0 in)	26 of 100 (Routine)

Counts by Type and Timescale

499 records

Records set or tied on 20 December 1964 by type: Highest daily maximum 16, Lowest daily maximum 75, Highest daily minimum 29, Lowest daily minimum 33, Heaviest daily rainfall 166, Heaviest daily snowfall 147, Deepest snow cover 33.

Records on 20 December 1964 by type
Record type	Records
Highest daily maximum	16
Lowest daily maximum	75
Highest daily minimum	29
Lowest daily minimum	33
Heaviest daily rainfall	166
Heaviest daily snowfall	147
Deepest snow cover	33

Records on 20 December 1964 by timescale: all-time 0, monthly 26, daily 473.

How Much Records Were Beaten By

404 broken records

Margins by which the 404 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 331.0. Ties are not counted.

Top 20 by Significance

20 December 1964

Top 20 records on 20 December 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 December 1964	Redmond 2 W, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	53 years	60 of 100 (Major)
20 December 1964	Three Lynx, US	monthly snowfall	45.7 cm (18.0 in)	22.8 cm (9.0 in)	12 years	57 of 100 (Notable)
20 December 1964	Three Lynx, US	monthly snow depth	58.4 cm (23.0 in)	25.4 cm (10.0 in)	12 years	57 of 100 (Notable)
20 December 1964	Glen Warren, AU	daily rain	29.2 mm (1.1 in)	23.4 mm (0.9 in)	39 years	55 of 100 (Notable)
20 December 1964	Anatone, US	daily snowfall	25.4 cm (10.0 in)	17.8 cm (7.0 in)	48 years	53 of 100 (Notable)
20 December 1964	Haskins Dam, US	monthly snowfall	55.9 cm (22.0 in)	22.9 cm (9.0 in)	0 years	51 of 100 (Notable)
20 December 1964	Cape St James, CA	monthly snowfall	12.7 cm (5.0 in)	5.1 cm (2.0 in)	31 years	50 of 100 (Notable)
20 December 1964	Minnedosa, CA	daily snowfall	12.7 cm (5.0 in)	6.3 cm (2.5 in)	61 years	50 of 100 (Notable)
20 December 1964	Anatone, US	daily rain	38.1 mm (1.5 in)	27.9 mm (1.1 in)	31 years	50 of 100 (Notable)
20 December 1964	Everett, US	daily snowfall	11.4 cm (4.5 in)	11.4 cm (4.5 in)	48 years	50 of 100 (Notable)
20 December 1964	Forks 1 E, US	daily snow depth	17.8 cm (7.0 in)	17.8 cm (7.0 in)	33 years	50 of 100 (Notable)
20 December 1964	Missoula 6 NW WFO, US	daily snowfall	18.3 cm (7.2 in)	8.1 cm (3.2 in)	66 years	49 of 100 (Notable)
20 December 1964	Bend, US	daily snow depth	27.9 cm (11.0 in)	17.7 cm (7.0 in)	57 years	49 of 100 (Notable)
20 December 1964	Birtle, CA	daily snowfall	13.5 cm (5.3 in)	11.0 cm (4.3 in)	9 years	48 of 100 (Notable)
20 December 1964	Lake 2 N, US	monthly rain	26.4 mm (1.0 in)	7.9 mm (0.31 in)	35 years	48 of 100 (Notable)
20 December 1964	Grouse, US	daily snowfall	35.6 cm (14.0 in)	33.1 cm (13.0 in)	9 years	45 of 100 (Notable)
20 December 1964	Blaine, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	66 years	44 of 100 (Notable)
20 December 1964	Fossil, US	daily snowfall	15.2 cm (6.0 in)	13.2 cm (5.2 in)	19 years	43 of 100 (Notable)
20 December 1964	Milan, IT	daily high min	8.7 C (47.7 F)	0.9 C (1.6 F)	170 years	42 of 100 (Notable)
20 December 1964	Enterprise Rs, US	daily snowfall	14.2 cm (5.6 in)	9.6 cm (3.8 in)	20 years	42 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 1964

Records set or tied on this calendar date in each year from 1793 to 1964. 1964 had 499 records.

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

Records on 12-20 in each year
Year	Records
1793	1
1795	1
1804	1
1805	2
1808	1
1815	1
1828	1
1837	1
1846	1
1855	8
1858	1
1860	1
1866	1
1867	1
1868	1
1869	1
1871	2
1874	3
1875	1
1877	2
1878	1
1879	1
1880	1
1881	1
1882	1
1884	4
1885	1
1886	4
1889	4
1890	2
1891	2
1892	1
1894	2
1895	8
1896	1
1897	4
1898	2
1899	1
1900	7
1901	8
1902	14
1903	17
1904	9
1905	5
1906	5
1907	11
1908	5
1909	22
1910	17
1911	24
1912	27
1913	7
1914	43
1915	18
1916	45
1917	33
1918	18
1919	25
1920	22
1921	101
1922	88
1923	215
1924	332
1925	96
1926	163
1927	200
1928	93
1929	256
1930	67
1931	536
1932	170
1933	492
1934	265
1935	152
1936	416
1937	181
1938	240
1939	308
1940	965
1941	633
1942	817
1943	193
1944	340
1945	430
1946	327
1947	385
1948	345
1949	1,141
1950	758
1951	926
1952	394
1953	385
1954	416
1955	726
1956	471
1957	1,354
1958	382
1959	142
1960	354
1961	369
1962	475
1963	875
1964	499
1965	353
1966	555
1967	1,370
1968	482
1969	514
1970	518
1971	441
1972	448
1973	1,184
1974	328
1975	610
1976	382
1977	484
1978	910
1979	600
1980	667
1981	1,681
1982	712
1983	2,995
1984	1,411
1985	1,035
1986	321
1987	1,179
1988	760
1989	1,812
1990	1,885
1991	1,172
1992	1,134
1993	1,266
1994	813
1995	1,128
1996	1,448
1997	651
1998	1,110
1999	938
2000	1,150
2001	523
2002	943
2003	1,315
2004	836
2005	515
2006	1,387
2007	986
2008	1,356
2009	1,502
2010	2,055
2011	846
2012	1,131
2013	584
2014	524
2015	1,238
2016	603
2017	688
2018	592
2019	731
2020	554
2021	442
2022	567
2023	1,242
2024	897
2025	1,166

Download the Data

Data for records on 1964-12-20: 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	349
50 to 100	36
100 to 150	8
150 to 200	7
200 to 250	2
250 to 300	1
300 to 350	1