Weather Records on 20 December 1945

430 weather records were set or tied worldwide on 20 December 1945. Highest significance: Addison, US.

Key Facts for 20 December 1945

On 20 December 1945, 430 weather records were set or tied at long-record stations worldwide.
7 were record highs and 237 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 419 daily.
Addison set a daily record snowfall of 25.4 cm (10.0 in) on 20 December 1945.
Across 163 earlier years (1793 to 2025) the same calendar date averaged 467 records.

Record Map

430 stations

430 station records on 20 December 1945 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 December 1945: highest significance records shown on the map
Station	Country	Type	Value	Significance
Addison	United States	Record daily snowfall	25.4 cm (10.0 in)	47 of 100 (Notable)
Ottawa	United States	Record snow depth	27.9 cm (11.0 in)	44 of 100 (Notable)
Belvidere	United States	Record daily snowfall	17.8 cm (7.0 in)	41 of 100 (Notable)
Wyndham Port	Australia	Record daily precipitation	58.9 mm (2.3 in)	37 of 100 (Notable)
Blue Hill Coop	United States	Record daily snowfall	14.7 cm (5.8 in)	37 of 100 (Notable)
Harkerville (Bos)	South Africa	Record daily precipitation	44.5 mm (1.8 in)	36 of 100 (Notable)
Storrs	United States	Record snow depth	38.1 cm (15.0 in)	35 of 100 (Notable)
Gleichen	Canada	Record daily snowfall	6.4 cm (2.5 in)	34 of 100 (Routine)
Effingham 3SW	United States	Record snow depth	12.7 cm (5.0 in)	34 of 100 (Routine)
Rushville	United States	Record snow depth	27.9 cm (11.0 in)	34 of 100 (Routine)
Gunnedah Pool	Australia	Record low minimum temperature	7.8 C (46.0 F)	32 of 100 (Routine)
Concord	United States	Record daily snowfall	9.7 cm (3.8 in)	32 of 100 (Routine)
Iola	United States	Record snow depth	15.2 cm (6.0 in)	31 of 100 (Routine)
Blue Hill Coop	United States	Record snow depth	35.6 cm (14.0 in)	30 of 100 (Routine)
Waynesville 1 E	United States	Record low minimum temperature	-20.6 C (-5.1 F)	30 of 100 (Routine)
Fairmont	United States	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Columbus	United States	Record snow depth	12.7 cm (5.0 in)	29 of 100 (Routine)
Worcester	United States	Record daily snowfall	8.9 cm (3.5 in)	29 of 100 (Routine)
Lewisburg	United States	Record daily snowfall	20.3 cm (8.0 in)	29 of 100 (Routine)
Philadelphia City	United States	Record snow depth	22.9 cm (9.0 in)	29 of 100 (Routine)
Calliope Post Office	Australia	Record daily precipitation	84.1 mm (3.3 in)	28 of 100 (Routine)
Southampton	Canada	Record daily snowfall	24.1 cm (9.5 in)	28 of 100 (Routine)
Simcoe	Canada	Record low minimum temperature	-26.1 C (-15.0 F)	28 of 100 (Routine)
Hightstown 2 W	United States	Record daily snowfall	5.1 cm (2.0 in)	28 of 100 (Routine)
Paisley	United States	Record low minimum temperature	-23.3 C (-9.9 F)	28 of 100 (Routine)
Williston Sloulin Fld	United States	Record snow depth	15.2 cm (6.0 in)	28 of 100 (Routine)
Hightstown 2 W	United States	Record snow depth	25.4 cm (10.0 in)	27 of 100 (Routine)
Goudveld (Bos)	South Africa	Record daily precipitation	30.2 mm (1.2 in)	26 of 100 (Routine)
Wickenburg	United States	Record low minimum temperature	-12.2 C (10.0 F)	26 of 100 (Routine)
Kokomo 3 WSW	United States	Record snow depth	30.5 cm (12.0 in)	26 of 100 (Routine)
1 WSW Princeton	United States	Record snow depth	10.2 cm (4.0 in)	26 of 100 (Routine)
Covington 8 WNW	United States	Record low maximum temperature	2.8 C (37.0 F)	26 of 100 (Routine)
Lock Haven	United States	Record daily snowfall	16.5 cm (6.5 in)	26 of 100 (Routine)
Newark Liberty Intl AP	United States	Record snow depth	17.8 cm (7.0 in)	26 of 100 (Routine)
Caron	Canada	Record daily snowfall	7.6 cm (3.0 in)	25 of 100 (Routine)
Mahackala	Russia	Record low minimum temperature	-15.9 C (3.4 F)	25 of 100 (Routine)
Lugansk	Ukraine	Record low minimum temperature	-29.4 C (-20.9 F)	25 of 100 (Routine)
Saint Johns	United States	Record low minimum temperature	-23.3 C (-9.9 F)	24 of 100 (Routine)
Greenville	United States	Record snow depth	15.2 cm (6.0 in)	24 of 100 (Routine)
Minot Exp STN	United States	Record snow depth	17.8 cm (7.0 in)	24 of 100 (Routine)
Ny City Cntrl Park	United States	Record snow depth	22.9 cm (9.0 in)	24 of 100 (Routine)
Moose Jaw Chab	Canada	Record daily snowfall	5.3 cm (2.1 in)	23 of 100 (Routine)
Gainesville	United States	Record low minimum temperature	-11.7 C (10.9 F)	23 of 100 (Routine)
Decatur Wtp	United States	Record snow depth	15.2 cm (6.0 in)	23 of 100 (Routine)
Alfred	United States	Record daily snowfall	10.2 cm (4.0 in)	23 of 100 (Routine)
Columbia Wb City	United States	Record snow depth	17.8 cm (7.0 in)	23 of 100 (Routine)
Denman Island	Canada	Record daily snowfall	7.6 cm (3.0 in)	22 of 100 (Routine)
Hillsdown	Canada	Record daily snowfall	10.2 cm (4.0 in)	22 of 100 (Routine)
Medicine Hat A	Canada	Record daily snowfall	8.4 cm (3.3 in)	22 of 100 (Routine)
Taganrog (Lighthouse)	Russia	Record low minimum temperature	-22.5 C (-8.5 F)	22 of 100 (Routine)
Selma	United States	Record low maximum temperature	2.2 C (36.0 F)	22 of 100 (Routine)
Griggsville	United States	Record snow depth	22.9 cm (9.0 in)	22 of 100 (Routine)
Bluffton Wtr Wks	United States	Record low minimum temperature	-22.2 C (-8.0 F)	22 of 100 (Routine)
Rushville	United States	Record snow depth	25.4 cm (10.0 in)	22 of 100 (Routine)
Whitestown	United States	Record snow depth	20.3 cm (8.0 in)	22 of 100 (Routine)
Hart 3 WSW	United States	Record daily snowfall	15.2 cm (6.0 in)	22 of 100 (Routine)
Batesville	United States	Record low maximum temperature	-4.4 C (24.1 F)	22 of 100 (Routine)
Haskinville	United States	Record daily snowfall	7.6 cm (3.0 in)	22 of 100 (Routine)
Port Jervis	United States	Record snow depth	40.6 cm (16.0 in)	22 of 100 (Routine)
Philo	United States	Record snow depth	15.2 cm (6.0 in)	22 of 100 (Routine)

Counts by Type and Timescale

430 records

Records set or tied on 20 December 1945 by type: Highest daily maximum 2, Lowest daily maximum 65, Highest daily minimum 5, Lowest daily minimum 172, Heaviest daily rainfall 61, Heaviest daily snowfall 45, Deepest snow cover 80.

Records on 20 December 1945 by type
Record type	Records
Highest daily maximum	2
Lowest daily maximum	65
Highest daily minimum	5
Lowest daily minimum	172
Heaviest daily rainfall	61
Heaviest daily snowfall	45
Deepest snow cover	80

Records on 20 December 1945 by timescale: all-time 1, monthly 10, daily 419.

How Much Records Were Beaten By

325 broken records

Margins by which the 325 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 279.0. Ties are not counted.

Top 20 by Significance

20 December 1945

Top 20 records on 20 December 1945 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 December 1945	Addison, US	daily snowfall	25.4 cm (10.0 in)	17.8 cm (7.0 in)	39 years	47 of 100 (Notable)
20 December 1945	Ottawa, US	daily snow depth	27.9 cm (11.0 in)	27.9 cm (11.0 in)	44 years	44 of 100 (Notable)
20 December 1945	Belvidere, US	daily snowfall	17.8 cm (7.0 in)	16.5 cm (6.5 in)	40 years	41 of 100 (Notable)
20 December 1945	Wyndham Port, AU	daily rain	58.9 mm (2.3 in)	31.7 mm (1.2 in)	34 years	37 of 100 (Notable)
20 December 1945	Blue Hill Coop, US	daily snowfall	14.7 cm (5.8 in)	9.6 cm (3.8 in)	52 years	37 of 100 (Notable)
20 December 1945	Harkerville (Bos), ZA	daily rain	44.5 mm (1.8 in)	28.0 mm (1.1 in)	8 years	36 of 100 (Notable)
20 December 1945	Storrs, US	monthly snow depth	38.1 cm (15.0 in)	10.2 cm (4.0 in)	18 years	35 of 100 (Notable)
20 December 1945	Gleichen, CA	daily snowfall	6.4 cm (2.5 in)	6.4 cm (2.5 in)	42 years	34 of 100 (Routine)
20 December 1945	Effingham 3SW, US	daily snow depth	12.7 cm (5.0 in)	7.6 cm (3.0 in)	31 years	34 of 100 (Routine)
20 December 1945	Rushville, US	daily snow depth	27.9 cm (11.0 in)	12.7 cm (5.0 in)	11 years	34 of 100 (Routine)
20 December 1945	Gunnedah Pool, AU	daily low min	7.8 C (46.0 F)	2.5 C (4.5 F)	65 years	32 of 100 (Routine)
20 December 1945	Concord, US	daily snowfall	9.7 cm (3.8 in)	7.2 cm (2.8 in)	46 years	32 of 100 (Routine)
20 December 1945	Iola, US	daily snow depth	15.2 cm (6.0 in)	7.6 cm (3.0 in)	31 years	31 of 100 (Routine)
20 December 1945	Blue Hill Coop, US	daily snow depth	35.6 cm (14.0 in)	10.2 cm (4.0 in)	40 years	30 of 100 (Routine)
20 December 1945	Waynesville 1 E, US	monthly low min	-20.6 C (-5.1 F)	0.6 C (1.1 F)	50 years	30 of 100 (Routine)
20 December 1945	Fairmont, US	daily rain	33.0 mm (1.3 in)	17.8 mm (0.7 in)	6 years	30 of 100 (Routine)
20 December 1945	Columbus, US	daily snow depth	12.7 cm (5.0 in)	12.7 cm (5.0 in)	44 years	29 of 100 (Routine)
20 December 1945	Worcester, US	daily snowfall	8.9 cm (3.5 in)	5.1 cm (2.0 in)	46 years	29 of 100 (Routine)
20 December 1945	Lewisburg, US	daily snowfall	20.3 cm (8.0 in)	12.7 cm (5.0 in)	15 years	29 of 100 (Routine)
20 December 1945	Philadelphia City, US	daily snow depth	22.9 cm (9.0 in)	7.7 cm (3.0 in)	40 years	29 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 1945

Records set or tied on this calendar date in each year from 1793 to 1945. 1945 had 430 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 1945-12-20: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 50	273
50 to 100	37
100 to 150	11
150 to 200	3
200 to 250	0
250 to 300	1