Weather Records on 15 December 1963

670 weather records were set or tied worldwide on 15 December 1963. Highest significance: Piranhas (Marechal Floriano), BR.

Key Facts for 15 December 1963

On 15 December 1963, 670 weather records were set or tied at long-record stations worldwide.
23 were record highs and 493 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 656 daily.
Piranhas (Marechal Floriano) set a monthly record daily precipitation of 119.0 mm (4.7 in) on 15 December 1963.
Across 168 earlier years (1793 to 2025) the same calendar date averaged 454 records.

Record Map

670 stations

670 station records on 15 December 1963 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 December 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Piranhas (Marechal Floriano)	Brazil	Record daily precipitation	119.0 mm (4.7 in)	67 of 100 (Major)
Brownsville	United States	Record daily precipitation	28.7 mm (1.1 in)	50 of 100 (Notable)
Yurecuaro	Mexico	Record daily precipitation	42.4 mm (1.7 in)	45 of 100 (Notable)
Irapuato	Mexico	Record daily precipitation	39.9 mm (1.6 in)	44 of 100 (Notable)
Gudauri	Georgia	Record daily precipitation	25.3 mm (1.0 in)	43 of 100 (Notable)
Blaine	United States	Record daily precipitation	43.9 mm (1.7 in)	42 of 100 (Notable)
Lichtentanne	Germany	Record low maximum temperature	-7.7 C (18.1 F)	40 of 100 (Notable)
Lichtentanne	Germany	Record low minimum temperature	-16.1 C (3.0 F)	39 of 100 (Notable)
Esplanada	Brazil	Record daily precipitation	51.8 mm (2.0 in)	38 of 100 (Notable)
Farmington	United States	Record snow depth	12.7 cm (5.0 in)	37 of 100 (Notable)
Tarome	Australia	Record daily precipitation	64.5 mm (2.5 in)	36 of 100 (Notable)
Villahermosa (Smn)	Mexico	Record daily precipitation	101.9 mm (4.0 in)	36 of 100 (Notable)
Sotchi	Russia	Record daily precipitation	47.2 mm (1.9 in)	36 of 100 (Notable)
Ishpeming	United States	Record daily snowfall	19.1 cm (7.5 in)	36 of 100 (Notable)
Barcelona -Fabra Observatory	Spain	Record low maximum temperature	-1.3 C (29.7 F)	34 of 100 (Routine)
Schriever	United States	Record low maximum temperature	4.4 C (39.9 F)	33 of 100 (Routine)
Tobias Barreto	Brazil	Record daily precipitation	52.1 mm (2.1 in)	32 of 100 (Routine)
Satna	India	Record daily precipitation	29.0 mm (1.1 in)	32 of 100 (Routine)
Schelm	South Africa	Record daily precipitation	55.5 mm (2.2 in)	32 of 100 (Routine)
Col du Grand St-Bernard	Switzerland	Record low minimum temperature	-20.0 C (-4.0 F)	32 of 100 (Routine)
Afogados da Ingazeira (Dnocs)	Brazil	Record daily precipitation	63.8 mm (2.5 in)	31 of 100 (Routine)
Gleichen	Canada	Record daily snowfall	10.2 cm (4.0 in)	31 of 100 (Routine)
Corning	United States	Record low maximum temperature	-16.7 C (1.9 F)	31 of 100 (Routine)
Ironwood	United States	Record daily snowfall	22.9 cm (9.0 in)	31 of 100 (Routine)
Hedley	Canada	Record daily snowfall	10.2 cm (4.0 in)	30 of 100 (Routine)
Bergland Dam	United States	Record daily snowfall	21.6 cm (8.5 in)	30 of 100 (Routine)
Springview 2NW	United States	Record low maximum temperature	-16.1 C (3.0 F)	30 of 100 (Routine)
Franklinville	United States	Record daily snowfall	20.3 cm (8.0 in)	30 of 100 (Routine)
Williston Sloulin Fld	United States	Record low minimum temperature	-33.9 C (-29.0 F)	30 of 100 (Routine)
Olivedos (Sao Francisco)	Brazil	Record daily precipitation	51.2 mm (2.0 in)	29 of 100 (Routine)
Grenfell	Canada	Record low minimum temperature	-34.4 C (-29.9 F)	29 of 100 (Routine)
Arnsberg	Germany	Record low minimum temperature	-16.3 C (2.7 F)	29 of 100 (Routine)
Lamar	United States	Record low maximum temperature	-8.3 C (17.1 F)	29 of 100 (Routine)
Defiance	United States	Record low maximum temperature	-11.7 C (10.9 F)	29 of 100 (Routine)
Olga 2 SE	United States	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Spokane Intl AP	United States	Record daily snowfall	12.2 cm (4.8 in)	29 of 100 (Routine)
Olds	Canada	Record daily snowfall	11.2 cm (4.4 in)	28 of 100 (Routine)
Girona (Antic Institut)	Spain	Record low maximum temperature	0.5 C (32.9 F)	28 of 100 (Routine)
Spicer	United States	Record daily snowfall	5.1 cm (2.0 in)	28 of 100 (Routine)
Winterset 4N	United States	Record low maximum temperature	-16.1 C (3.0 F)	28 of 100 (Routine)
Hoxie	United States	Record low maximum temperature	-10.6 C (12.9 F)	28 of 100 (Routine)
Missoula 6 NW WFO	United States	Record daily snowfall	7.6 cm (3.0 in)	28 of 100 (Routine)
Bernburg/Saale (Nord)	Germany	Record low minimum temperature	-17.6 C (0.3 F)	27 of 100 (Routine)
Sombrerete (Dge)	Mexico	Record low maximum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Antioch Fibrebrd Mills	United States	Record low maximum temperature	3.9 C (39.0 F)	27 of 100 (Routine)
Kern River Ph 1	United States	Record low maximum temperature	4.4 C (39.9 F)	27 of 100 (Routine)
Manistee 3SE	United States	Record daily snowfall	17.8 cm (7.0 in)	27 of 100 (Routine)
Biloxi	United States	Record low maximum temperature	4.4 C (39.9 F)	27 of 100 (Routine)
Poco Das Trincheiras	Brazil	Record daily precipitation	34.2 mm (1.3 in)	26 of 100 (Routine)
Araci	Brazil	Record daily precipitation	78.5 mm (3.1 in)	26 of 100 (Routine)
Cuatro Cienegas (Smn)	Mexico	Record low maximum temperature	5.0 C (41.0 F)	26 of 100 (Routine)
Uman	Ukraine	Record low minimum temperature	-23.9 C (-11.0 F)	26 of 100 (Routine)
Ames 3 SW	United States	Record low maximum temperature	-16.1 C (3.0 F)	26 of 100 (Routine)
Westernport	United States	Record low maximum temperature	-6.7 C (19.9 F)	26 of 100 (Routine)
Detour Village	United States	Record daily snowfall	15.2 cm (6.0 in)	26 of 100 (Routine)
Ipswich	United States	Record low minimum temperature	-30.6 C (-23.1 F)	26 of 100 (Routine)
Northport	United States	Record daily snowfall	14.0 cm (5.5 in)	26 of 100 (Routine)
Huron Rgnl AP	United States	Record low minimum temperature	-30.6 C (-23.1 F)	26 of 100 (Routine)
Euclides da Cunha (Cumbe)	Brazil	Record daily precipitation	36.8 mm (1.4 in)	25 of 100 (Routine)
Lyon - St Exupery	France	Record low maximum temperature	-5.4 C (22.3 F)	25 of 100 (Routine)

Counts by Type and Timescale

670 records

Records set or tied on 15 December 1963 by type: Highest daily maximum 14, Lowest daily maximum 337, Highest daily minimum 9, Lowest daily minimum 156, Heaviest daily rainfall 95, Heaviest daily snowfall 45, Deepest snow cover 14.

Records on 15 December 1963 by type
Record type	Records
Highest daily maximum	14
Lowest daily maximum	337
Highest daily minimum	9
Lowest daily minimum	156
Heaviest daily rainfall	95
Heaviest daily snowfall	45
Deepest snow cover	14

Records on 15 December 1963 by timescale: all-time 0, monthly 14, daily 656.

How Much Records Were Beaten By

515 broken records

Margins by which the 515 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 115.0. Ties are not counted.

Top 20 by Significance

15 December 1963

Top 20 records on 15 December 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 December 1963	Piranhas (Marechal Floriano), BR	monthly rain	119.0 mm (4.7 in)	53.0 mm (2.1 in)	50 years	67 of 100 (Major)
15 December 1963	Brownsville, US	daily rain	28.7 mm (1.1 in)	26.2 mm (1.0 in)	44 years	50 of 100 (Notable)
15 December 1963	Yurecuaro, MX	daily rain	42.4 mm (1.7 in)	30.2 mm (1.2 in)	37 years	45 of 100 (Notable)
15 December 1963	Irapuato, MX	monthly rain	39.9 mm (1.6 in)	12.5 mm (0.5 in)	37 years	44 of 100 (Notable)
15 December 1963	Gudauri, GE	daily rain	25.3 mm (1.0 in)	15.3 mm (0.6 in)	70 years	43 of 100 (Notable)
15 December 1963	Blaine, US	daily rain	43.9 mm (1.7 in)	21.0 mm (0.8 in)	40 years	42 of 100 (Notable)
15 December 1963	Lichtentanne, DE	daily low max	-7.7 C (18.1 F)	2.7 C (4.9 F)	83 years	40 of 100 (Notable)
15 December 1963	Lichtentanne, DE	daily low min	-16.1 C (3.0 F)	2.7 C (4.9 F)	83 years	39 of 100 (Notable)
15 December 1963	Esplanada, BR	daily rain	51.8 mm (2.0 in)	35.8 mm (1.4 in)	10 years	38 of 100 (Notable)
15 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)
15 December 1963	Tarome, AU	daily rain	64.5 mm (2.5 in)	47.2 mm (1.9 in)	8 years	36 of 100 (Notable)
15 December 1963	Villahermosa (Smn), MX	daily rain	101.9 mm (4.0 in)	60.0 mm (2.4 in)	17 years	36 of 100 (Notable)
15 December 1963	Sotchi, RU	daily rain	47.2 mm (1.9 in)	6.2 mm (0.24 in)	82 years	36 of 100 (Notable)
15 December 1963	Ishpeming, US	daily snowfall	19.1 cm (7.5 in)	11.5 cm (4.5 in)	29 years	36 of 100 (Notable)
15 December 1963	Barcelona -Fabra Observatory, ES	daily low max	-1.3 C (29.7 F)	5.8 C (10.4 F)	37 years	34 of 100 (Routine)
15 December 1963	Schriever, US	daily low max	4.4 C (39.9 F)	3.9 C (7.0 F)	64 years	33 of 100 (Routine)
15 December 1963	Tobias Barreto, BR	daily rain	52.1 mm (2.1 in)	18.8 mm (0.7 in)	48 years	32 of 100 (Routine)
15 December 1963	Satna, IN	monthly rain	29.0 mm (1.1 in)	5.4 mm (0.21 in)	25 years	32 of 100 (Routine)
15 December 1963	Schelm, ZA	daily rain	55.5 mm (2.2 in)	34.7 mm (1.4 in)	29 years	32 of 100 (Routine)
15 December 1963	Col du Grand St-Bernard, CH	daily low min	-20.0 C (-4.0 F)	1.8 C (3.2 F)	63 years	32 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 670 records.

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

Records on 12-15 in each year
Year	Records
1793	1
1796	1
1798	1
1800	1
1808	3
1810	1
1814	3
1815	1
1825	1
1831	1
1840	2
1844	2
1846	3
1847	1
1854	3
1859	2
1863	1
1864	1
1866	1
1867	2
1868	1
1869	1
1870	1
1873	1
1874	1
1878	4
1879	2
1880	2
1881	3
1882	2
1883	1
1885	1
1886	1
1889	3
1890	1
1891	2
1892	4
1893	1
1894	4
1895	1
1896	5
1897	2
1899	12
1900	5
1901	21
1902	3
1903	7
1904	9
1905	6
1906	9
1907	10
1908	5
1909	5
1910	4
1911	23
1912	42
1913	13
1914	239
1915	180
1916	40
1917	40
1918	54
1919	28
1920	35
1921	26
1922	65
1923	132
1924	358
1925	187
1926	226
1927	235
1928	388
1929	500
1930	160
1931	284
1932	385
1933	796
1934	199
1935	140
1936	286
1937	310
1938	100
1939	637
1940	464
1941	373
1942	385
1943	486
1944	281
1945	420
1946	521
1947	634
1948	1,239
1949	135
1950	292
1951	962
1952	367
1953	270
1954	413
1955	371
1956	531
1957	304
1958	531
1959	560
1960	313
1961	883
1962	979
1963	670
1964	371
1965	759
1966	275
1967	948
1968	510
1969	352
1970	215
1971	1,739
1972	1,159
1973	615
1974	511
1975	1,230
1976	349
1977	963
1978	499
1979	560
1980	1,085
1981	1,243
1982	831
1983	1,229
1984	1,397
1985	1,077
1986	502
1987	1,740
1988	519
1989	2,753
1990	846
1991	636
1992	1,263
1993	734
1994	676
1995	848
1996	727
1997	1,521
1998	1,216
1999	621
2000	1,154
2001	1,026
2002	831
2003	846
2004	795
2005	953
2006	1,491
2007	973
2008	1,789
2009	930
2010	1,705
2011	780
2012	1,058
2013	701
2014	1,045
2015	1,398
2016	1,024
2017	332
2018	539
2019	547
2020	400
2021	1,182
2022	1,057
2023	794
2024	369
2025	2,115

Download the Data

Data for records on 1963-12-15: 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 20	474
20 to 40	21
40 to 60	5
60 to 80	9
80 to 100	3
100 to 120	3