Weather Records on 21 December 1946

495 weather records were set or tied worldwide on 21 December 1946. Highest significance: State College, US.

Key Facts for 21 December 1946

On 21 December 1946, 495 weather records were set or tied at long-record stations worldwide.
52 were record highs and 45 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 17 monthly and 478 daily.
State College set a daily record snowfall of 24.1 cm (9.5 in) on 21 December 1946.
Across 158 earlier years (1793 to 2025) the same calendar date averaged 489 records.

Record Map

495 stations

495 station records on 21 December 1946 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 December 1946: highest significance records shown on the map
Station	Country	Type	Value	Significance
State College	United States	Record daily snowfall	24.1 cm (9.5 in)	61 of 100 (Major)
Concord	United States	Record daily precipitation	61.5 mm (2.4 in)	54 of 100 (Notable)
Freehold-Marlboro	United States	Record daily precipitation	68.1 mm (2.7 in)	53 of 100 (Notable)
New Bedford Coop	United States	Record daily precipitation	73.2 mm (2.9 in)	52 of 100 (Notable)
Honohina 137	United States	Record daily precipitation	232.4 mm (9.1 in)	52 of 100 (Notable)
Blue Hill Coop	United States	Record daily precipitation	60.2 mm (2.4 in)	49 of 100 (Notable)
Chazy	United States	Record daily precipitation	26.9 mm (1.1 in)	49 of 100 (Notable)
Lynchburg 7 St Brg	United States	Record daily precipitation	43.7 mm (1.7 in)	49 of 100 (Notable)
Hakalau 142	United States	Record daily precipitation	213.4 mm (8.4 in)	49 of 100 (Notable)
Eastport	United States	Record daily precipitation	57.2 mm (2.3 in)	48 of 100 (Notable)
Rockport 1 ESE	United States	Record daily precipitation	72.4 mm (2.9 in)	48 of 100 (Notable)
Kailua 446	United States	Record daily precipitation	111.8 mm (4.4 in)	48 of 100 (Notable)
Jaguaruana	Brazil	Record daily precipitation	55.5 mm (2.2 in)	46 of 100 (Notable)
Salisbury	United States	Record daily snowfall	22.9 cm (9.0 in)	46 of 100 (Notable)
Fortaleza (Escola Regional)	Brazil	Record daily precipitation	51.2 mm (2.0 in)	45 of 100 (Notable)
Stillwater	Canada	Record daily precipitation	80.0 mm (3.1 in)	45 of 100 (Notable)
Vlaklaagte	South Africa	Record daily precipitation	57.2 mm (2.3 in)	45 of 100 (Notable)
Carlisle	United States	Record daily precipitation	25.4 mm (1.0 in)	45 of 100 (Notable)
Holtwood	United States	Record daily precipitation	37.1 mm (1.5 in)	45 of 100 (Notable)
Sao Joao Do Jaguaribe	Brazil	Record daily precipitation	41.4 mm (1.6 in)	42 of 100 (Notable)
Windsor Kings College	Canada	Record daily precipitation	37.8 mm (1.5 in)	42 of 100 (Notable)
Olaa 92	United States	Record daily precipitation	158.8 mm (6.3 in)	42 of 100 (Notable)
Luis Gomes	Brazil	Record daily precipitation	95.0 mm (3.7 in)	41 of 100 (Notable)
Chinook Cove	Canada	Record daily precipitation	27.9 mm (1.1 in)	41 of 100 (Notable)
Chinook Cove	Canada	Record daily snowfall	27.9 cm (11.0 in)	40 of 100 (Notable)
Digby	Canada	Record daily precipitation	70.4 mm (2.8 in)	40 of 100 (Notable)
Truro Nsac	Canada	Record daily precipitation	36.8 mm (1.4 in)	40 of 100 (Notable)
Hammonton 1 NE	United States	Record daily precipitation	40.4 mm (1.6 in)	40 of 100 (Notable)
Hyannis	United States	Record daily precipitation	59.7 mm (2.4 in)	39 of 100 (Notable)
Quakertown	United States	Record daily precipitation	35.1 mm (1.4 in)	39 of 100 (Notable)
Senador Pompeu	Brazil	Record daily precipitation	48.0 mm (1.9 in)	38 of 100 (Notable)
Iguatu	Brazil	Record daily precipitation	75.2 mm (3.0 in)	38 of 100 (Notable)
Plymouth-Kingston	United States	Record daily precipitation	62.2 mm (2.4 in)	38 of 100 (Notable)
Taunton	United States	Record daily precipitation	58.4 mm (2.3 in)	38 of 100 (Notable)
Worcester	United States	Record daily precipitation	50.8 mm (2.0 in)	38 of 100 (Notable)
Auburn	United States	Record daily snowfall	18.5 cm (7.3 in)	38 of 100 (Notable)
Gouldsboro	United States	Record daily precipitation	27.9 mm (1.1 in)	38 of 100 (Notable)
Lock Haven	United States	Record daily precipitation	27.2 mm (1.1 in)	38 of 100 (Notable)
Phoenixville 1 E	United States	Record daily precipitation	35.6 mm (1.4 in)	38 of 100 (Notable)
Araruna	Brazil	Record daily precipitation	32.3 mm (1.3 in)	37 of 100 (Notable)
Lewiston	United States	Record daily precipitation	42.9 mm (1.7 in)	37 of 100 (Notable)
Itaporanga (Misericordia)	Brazil	Record daily precipitation	48.4 mm (1.9 in)	36 of 100 (Notable)
Serra Talhada	Brazil	Record daily precipitation	50.6 mm (2.0 in)	36 of 100 (Notable)
Randfontein (Gm)	South Africa	Record daily precipitation	56.9 mm (2.2 in)	36 of 100 (Notable)
Moores Hill	United States	Record daily snowfall	10.2 cm (4.0 in)	36 of 100 (Notable)
Brockton	United States	Record daily precipitation	48.3 mm (1.9 in)	36 of 100 (Notable)
Hightstown 2 W	United States	Record daily precipitation	55.6 mm (2.2 in)	36 of 100 (Notable)
Neshaminy Falls	United States	Record daily precipitation	44.5 mm (1.8 in)	36 of 100 (Notable)
Pottstown	United States	Record daily precipitation	38.9 mm (1.5 in)	36 of 100 (Notable)
Columbia 2SSE	United States	Record daily precipitation	28.7 mm (1.1 in)	36 of 100 (Notable)
Patu	Brazil	Record daily precipitation	95.0 mm (3.7 in)	35 of 100 (Notable)
Lawrence	United States	Record daily precipitation	47.5 mm (1.9 in)	35 of 100 (Notable)
Papaikou 144.1	United States	Record daily precipitation	189.2 mm (7.4 in)	35 of 100 (Notable)
Jaguaribe	Brazil	Record daily precipitation	101.0 mm (4.0 in)	34 of 100 (Routine)
Rumford	United States	Record daily precipitation	35.6 mm (1.4 in)	34 of 100 (Routine)
Towson	United States	Record daily precipitation	40.6 mm (1.6 in)	34 of 100 (Routine)
Indian Mills 2 W	United States	Record daily precipitation	48.3 mm (1.9 in)	34 of 100 (Routine)
Albany	United States	Record daily precipitation	26.7 mm (1.1 in)	34 of 100 (Routine)
Lima Wwtp	United States	Record daily snowfall	12.7 cm (5.0 in)	34 of 100 (Routine)
Lucan	Canada	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)

Counts by Type and Timescale

495 records

Records set or tied on 21 December 1946 by type: Highest daily maximum 31, Lowest daily maximum 21, Highest daily minimum 21, Lowest daily minimum 24, Heaviest daily rainfall 308, Heaviest daily snowfall 87, Deepest snow cover 3.

Records on 21 December 1946 by type
Record type	Records
Highest daily maximum	31
Lowest daily maximum	21
Highest daily minimum	21
Lowest daily minimum	24
Heaviest daily rainfall	308
Heaviest daily snowfall	87
Deepest snow cover	3

Records on 21 December 1946 by timescale: all-time 0, monthly 17, daily 478.

How Much Records Were Beaten By

436 broken records

Margins by which the 436 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 194.0. Ties are not counted.

Top 20 by Significance

21 December 1946

Top 20 records on 21 December 1946 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 December 1946	State College, US	daily snowfall	24.1 cm (9.5 in)	17.7 cm (7.0 in)	58 years	61 of 100 (Major)
21 December 1946	Concord, US	daily rain	61.5 mm (2.4 in)	37.6 mm (1.5 in)	40 years	54 of 100 (Notable)
21 December 1946	Freehold-Marlboro, US	daily rain	68.1 mm (2.7 in)	29.5 mm (1.2 in)	67 years	53 of 100 (Notable)
21 December 1946	New Bedford Coop, US	daily rain	73.2 mm (2.9 in)	41.4 mm (1.6 in)	40 years	52 of 100 (Notable)
21 December 1946	Honohina 137, US	daily rain	232.4 mm (9.1 in)	194.0 mm (7.6 in)	29 years	52 of 100 (Notable)
21 December 1946	Blue Hill Coop, US	daily rain	60.2 mm (2.4 in)	36.3 mm (1.4 in)	32 years	49 of 100 (Notable)
21 December 1946	Chazy, US	daily rain	26.9 mm (1.1 in)	19.3 mm (0.8 in)	44 years	49 of 100 (Notable)
21 December 1946	Lynchburg 7 St Brg, US	daily rain	43.7 mm (1.7 in)	31.5 mm (1.2 in)	32 years	49 of 100 (Notable)
21 December 1946	Hakalau 142, US	daily rain	213.4 mm (8.4 in)	134.7 mm (5.3 in)	19 years	49 of 100 (Notable)
21 December 1946	Eastport, US	monthly rain	57.2 mm (2.3 in)	17.1 mm (0.7 in)	34 years	48 of 100 (Notable)
21 December 1946	Rockport 1 ESE, US	daily rain	72.4 mm (2.9 in)	39.4 mm (1.6 in)	44 years	48 of 100 (Notable)
21 December 1946	Kailua 446, US	daily rain	111.8 mm (4.4 in)	68.4 mm (2.7 in)	40 years	48 of 100 (Notable)
21 December 1946	Jaguaruana, BR	daily rain	55.5 mm (2.2 in)	53.1 mm (2.1 in)	12 years	46 of 100 (Notable)
21 December 1946	Salisbury, US	daily snowfall	22.9 cm (9.0 in)	15.3 cm (6.0 in)	32 years	46 of 100 (Notable)
21 December 1946	Fortaleza (Escola Regional), BR	daily rain	51.2 mm (2.0 in)	44.5 mm (1.8 in)	24 years	45 of 100 (Notable)
21 December 1946	Stillwater, CA	daily rain	80.0 mm (3.1 in)	52.6 mm (2.1 in)	7 years	45 of 100 (Notable)
21 December 1946	Vlaklaagte, ZA	daily rain	57.2 mm (2.3 in)	39.4 mm (1.6 in)	36 years	45 of 100 (Notable)
21 December 1946	Carlisle, US	daily rain	25.4 mm (1.0 in)	6.3 mm (0.25 in)	97 years	45 of 100 (Notable)
21 December 1946	Holtwood, US	daily rain	37.1 mm (1.5 in)	26.9 mm (1.1 in)	32 years	45 of 100 (Notable)
21 December 1946	Sao Joao Do Jaguaribe, BR	daily rain	41.4 mm (1.6 in)	41.4 mm (1.6 in)	35 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 1946

Records set or tied on this calendar date in each year from 1793 to 1946. 1946 had 495 records.

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

Records on 12-21 in each year
Year	Records
1793	1
1794	1
1799	1
1801	2
1808	3
1825	1
1828	1
1839	1
1846	1
1850	1
1855	7
1859	1
1860	1
1868	1
1870	1
1871	2
1874	2
1875	3
1876	1
1877	1
1878	1
1879	1
1880	1
1884	1
1886	3
1889	1
1890	4
1893	4
1894	1
1895	5
1896	3
1897	3
1898	1
1900	8
1901	15
1902	5
1903	25
1904	3
1905	15
1906	15
1907	17
1908	19
1909	20
1910	29
1911	36
1912	23
1913	11
1914	107
1915	43
1916	40
1917	18
1918	41
1919	57
1920	30
1921	104
1922	34
1923	323
1924	377
1925	120
1926	178
1927	147
1928	70
1929	156
1930	66
1931	556
1932	150
1933	581
1934	230
1935	398
1936	323
1937	189
1938	145
1939	140
1940	622
1941	651
1942	968
1943	148
1944	762
1945	396
1946	495
1947	700
1948	297
1949	1,281
1950	504
1951	1,061
1952	197
1953	256
1954	444
1955	888
1956	672
1957	846
1958	516
1959	272
1960	585
1961	254
1962	563
1963	1,137
1964	613
1965	247
1966	400
1967	1,923
1968	818
1969	828
1970	547
1971	680
1972	651
1973	1,292
1974	374
1975	548
1976	446
1977	470
1978	517
1979	558
1980	726
1981	1,476
1982	702
1983	3,324
1984	1,012
1985	979
1986	404
1987	775
1988	717
1989	3,203
1990	2,701
1991	1,125
1992	751
1993	967
1994	793
1995	878
1996	1,114
1997	810
1998	1,142
1999	851
2000	944
2001	650
2002	579
2003	1,103
2004	675
2005	606
2006	1,443
2007	946
2008	1,062
2009	1,097
2010	2,039
2011	653
2012	759
2013	1,029
2014	878
2015	1,173
2016	543
2017	459
2018	742
2019	755
2020	965
2021	323
2022	528
2023	1,170
2024	778
2025	1,099

Download the Data

Data for records on 1946-12-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 25	338
25 to 50	61
50 to 75	16
75 to 100	10
100 to 125	6
125 to 150	1
150 to 175	2
175 to 200	2