Weather Records on 30 December 1939

237 weather records were set or tied worldwide on 30 December 1939. Highest significance: Yarmouth, CA.

Key Facts for 30 December 1939

On 30 December 1939, 237 weather records were set or tied at long-record stations worldwide.
63 were record highs and 65 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 5 monthly and 231 daily.
Yarmouth set a daily record snowfall of 38.6 cm (15.2 in) on 30 December 1939.
Across 154 earlier years (1799 to 2025) the same calendar date averaged 497 records.

Record Map

237 stations

237 station records on 30 December 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 December 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Yarmouth	Canada	Record daily snowfall	38.6 cm (15.2 in)	57 of 100 (Notable)
Rolla Missouri S&T	United States	Record snow depth	15.2 cm (6.0 in)	41 of 100 (Notable)
Portland	United States	Record daily snowfall	18.8 cm (7.4 in)	40 of 100 (Notable)
Kremsmuenster	Austria	Record low maximum temperature	-15.6 C (3.9 F)	36 of 100 (Notable)
Saint John	Canada	Record daily snowfall	25.4 cm (10.0 in)	35 of 100 (Notable)
Kjahta	Russia	Record high minimum temperature	-10.2 C (13.6 F)	34 of 100 (Routine)
Parry Sound	Canada	Record daily snowfall	17.8 cm (7.0 in)	33 of 100 (Routine)
Yarmouth	Canada	Record daily precipitation	38.6 mm (1.5 in)	33 of 100 (Routine)
Nurnberg	Germany	Record low minimum temperature	-22.8 C (-9.0 F)	33 of 100 (Routine)
Eulolo Station	Australia	Record daily precipitation	39.1 mm (1.5 in)	32 of 100 (Routine)
Kremsmuenster	Austria	Record low minimum temperature	-21.0 C (-5.8 F)	32 of 100 (Routine)
Salzburg	Austria	Record low minimum temperature	-22.8 C (-9.0 F)	31 of 100 (Routine)
Stuttgart-Stadt	Germany	Record low minimum temperature	-25.8 C (-14.4 F)	31 of 100 (Routine)
Hypoluxo	United States	Record daily precipitation	43.4 mm (1.7 in)	31 of 100 (Routine)
Concord	United States	Record daily snowfall	7.9 cm (3.1 in)	31 of 100 (Routine)
Karlsruhe	Germany	Record low minimum temperature	-21.5 C (-6.7 F)	30 of 100 (Routine)
Munchen-Nymphenburg	Germany	Record low minimum temperature	-21.1 C (-6.0 F)	30 of 100 (Routine)
Dalhart Exp STN	United States	Record snow depth	17.8 cm (7.0 in)	30 of 100 (Routine)
Greifswald	Germany	Record snow depth	16.0 cm (6.3 in)	29 of 100 (Routine)
Hvar	Croatia	Record low minimum temperature	-2.4 C (27.7 F)	29 of 100 (Routine)
Griggsville	United States	Record snow depth	25.4 cm (10.0 in)	29 of 100 (Routine)
Hohenpeissenberg	Germany	Record low minimum temperature	-20.4 C (-4.7 F)	28 of 100 (Routine)
Augsburg (Sankt Stephan)	Germany	Record low minimum temperature	-20.9 C (-5.6 F)	28 of 100 (Routine)
Nerchinskij Zavod	Russia	Record high minimum temperature	-17.5 C (0.5 F)	28 of 100 (Routine)
Clayton Muni Air Pk	United States	Record snow depth	20.3 cm (8.0 in)	28 of 100 (Routine)
Danville	United States	Record snow depth	12.7 cm (5.0 in)	27 of 100 (Routine)
Blue Hill Coop	United States	Record daily snowfall	15.0 cm (5.9 in)	27 of 100 (Routine)
Graz	Austria	Record low maximum temperature	-10.8 C (12.6 F)	26 of 100 (Routine)
Irkutsk	Russia	Record high minimum temperature	-8.7 C (16.3 F)	26 of 100 (Routine)
Lowestoft	United Kingdom	Record low minimum temperature	-6.1 C (21.0 F)	25 of 100 (Routine)
Rushville	United States	Record snow depth	12.7 cm (5.0 in)	25 of 100 (Routine)
Bremerton	United States	Record daily precipitation	50.8 mm (2.0 in)	25 of 100 (Routine)
Chemnitz	Germany	Record snow depth	20.0 cm (7.9 in)	24 of 100 (Routine)
Weissenburg	Germany	Record low minimum temperature	-24.1 C (-11.4 F)	24 of 100 (Routine)
Hvar	Croatia	Record low maximum temperature	0.6 C (33.1 F)	24 of 100 (Routine)
Salzburg	Austria	Record low maximum temperature	-11.4 C (11.5 F)	23 of 100 (Routine)
Innsbruck	Austria	Record low minimum temperature	-17.0 C (1.4 F)	23 of 100 (Routine)
Leipzig-Holzhausen	Germany	Record low minimum temperature	-17.5 C (0.5 F)	23 of 100 (Routine)
Babuskin	Russia	Record high minimum temperature	-4.0 C (24.8 F)	23 of 100 (Routine)
Borzja	Russia	Record high minimum temperature	-13.0 C (8.6 F)	23 of 100 (Routine)
Ljubljana Bezigrad	Slovenia	Record low minimum temperature	-19.0 C (-2.2 F)	23 of 100 (Routine)
Olney 2S	United States	Record snow depth	12.7 cm (5.0 in)	23 of 100 (Routine)
Innsbruck	Austria	Record low maximum temperature	-10.5 C (13.1 F)	22 of 100 (Routine)
Blagovescensk	Russia	Record high minimum temperature	-13.9 C (7.0 F)	22 of 100 (Routine)
Mt Vernon	United States	Record snow depth	12.7 cm (5.0 in)	22 of 100 (Routine)
Logan 1 WNW	United States	Record snow depth	127.0 cm (50.0 in)	22 of 100 (Routine)
Ord River	Australia	Record daily precipitation	38.1 mm (1.5 in)	21 of 100 (Routine)
Moncton	Canada	Record daily snowfall	17.8 cm (7.0 in)	21 of 100 (Routine)
Heinersreuth-Vollhof	Germany	Record low minimum temperature	-24.0 C (-11.2 F)	21 of 100 (Routine)
Plauen	Germany	Record low minimum temperature	-19.5 C (-3.1 F)	21 of 100 (Routine)
Gospic	Croatia	Record low minimum temperature	-16.4 C (2.5 F)	21 of 100 (Routine)
Ljubljana Bezigrad	Slovenia	Record low maximum temperature	-9.6 C (14.7 F)	21 of 100 (Routine)
Cuyamaca	United States	Record high maximum temperature	20.0 C (68.0 F)	21 of 100 (Routine)
La Ctr	United States	Record daily precipitation	46.2 mm (1.8 in)	21 of 100 (Routine)
Port Germein (Telowie)	Australia	Record daily precipitation	2.3 mm (0.09 in)	20 of 100 (Routine)
Pelee Island	Canada	Record daily snowfall	2.5 cm (1.0 in)	20 of 100 (Routine)
Parry Sound	Canada	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Du Quoin 4 SE	United States	Record snow depth	7.6 cm (3.0 in)	20 of 100 (Routine)
Kaiserslautern	Germany	Record low minimum temperature	-22.2 C (-8.0 F)	20 of 100 (Routine)
Regensburg	Germany	Record low minimum temperature	-27.2 C (-17.0 F)	20 of 100 (Routine)

Counts by Type and Timescale

237 records

Records set or tied on 30 December 1939 by type: Highest daily maximum 20, Lowest daily maximum 21, Highest daily minimum 43, Lowest daily minimum 44, Heaviest daily rainfall 42, Heaviest daily snowfall 26, Deepest snow cover 41.

Records on 30 December 1939 by type
Record type	Records
Highest daily maximum	20
Lowest daily maximum	21
Highest daily minimum	43
Lowest daily minimum	44
Heaviest daily rainfall	42
Heaviest daily snowfall	26
Deepest snow cover	41

Records on 30 December 1939 by timescale: all-time 1, monthly 5, daily 231.

How Much Records Were Beaten By

187 broken records

Margins by which the 187 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1016.0. Ties are not counted.

Top 20 by Significance

30 December 1939

Top 20 records on 30 December 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 December 1939	Yarmouth, CA	daily snowfall	38.6 cm (15.2 in)	25.4 cm (10.0 in)	36 years	57 of 100 (Notable)
30 December 1939	Rolla Missouri S&T, US	daily snow depth	15.2 cm (6.0 in)	10.1 cm (4.0 in)	29 years	41 of 100 (Notable)
30 December 1939	Portland, US	daily snowfall	18.8 cm (7.4 in)	12.7 cm (5.0 in)	41 years	40 of 100 (Notable)
30 December 1939	Kremsmuenster, AT	daily low max	-15.6 C (3.9 F)	7.2 C (13.0 F)	46 years	36 of 100 (Notable)
30 December 1939	Saint John, CA	daily snowfall	25.4 cm (10.0 in)	6.3 cm (2.5 in)	62 years	35 of 100 (Notable)
30 December 1939	Kjahta, RU	daily high min	-10.2 C (13.6 F)	9.6 C (17.3 F)	43 years	34 of 100 (Routine)
30 December 1939	Parry Sound, CA	daily snowfall	17.8 cm (7.0 in)	6.4 cm (2.5 in)	58 years	33 of 100 (Routine)
30 December 1939	Yarmouth, CA	daily rain	38.6 mm (1.5 in)	13.2 mm (0.5 in)	37 years	33 of 100 (Routine)
30 December 1939	Nurnberg, DE	daily low min	-22.8 C (-9.0 F)	6.6 C (11.9 F)	51 years	33 of 100 (Routine)
30 December 1939	Eulolo Station, AU	daily rain	39.1 mm (1.5 in)	29.2 mm (1.1 in)	18 years	32 of 100 (Routine)
30 December 1939	Kremsmuenster, AT	daily low min	-21.0 C (-5.8 F)	5.7 C (10.3 F)	48 years	32 of 100 (Routine)
30 December 1939	Salzburg, AT	daily low min	-22.8 C (-9.0 F)	6.0 C (10.8 F)	45 years	31 of 100 (Routine)
30 December 1939	Stuttgart-Stadt, DE	all-time low min	-25.8 C (-14.4 F)	2.1 C (3.8 F)	10 years	31 of 100 (Routine)
30 December 1939	Hypoluxo, US	daily rain	43.4 mm (1.7 in)	30.7 mm (1.2 in)	2 years	31 of 100 (Routine)
30 December 1939	Concord, US	daily snowfall	7.9 cm (3.1 in)	2.8 cm (1.1 in)	68 years	31 of 100 (Routine)
30 December 1939	Karlsruhe, DE	daily low min	-21.5 C (-6.7 F)	5.0 C (9.0 F)	51 years	30 of 100 (Routine)
30 December 1939	Munchen-Nymphenburg, DE	daily low min	-21.1 C (-6.0 F)	5.3 C (9.5 F)	48 years	30 of 100 (Routine)
30 December 1939	Dalhart Exp STN, US	daily snow depth	17.8 cm (7.0 in)	17.8 cm (7.0 in)	33 years	30 of 100 (Routine)
30 December 1939	Greifswald, DE	daily snow depth	16.0 cm (6.3 in)	7.0 cm (2.8 in)	33 years	29 of 100 (Routine)
30 December 1939	Hvar, HR	daily low min	-2.4 C (27.7 F)	3.0 C (5.4 F)	51 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

1799 to 1939

Records set or tied on this calendar date in each year from 1799 to 1939. 1939 had 237 records.

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

Records on 12-30 in each year
Year	Records
1799	2
1835	1
1850	1
1853	1
1856	1
1859	1
1863	1
1868	1
1870	4
1872	3
1874	2
1875	2
1876	3
1878	1
1880	5
1881	3
1882	3
1884	2
1888	2
1889	2
1890	7
1891	1
1892	1
1893	3
1895	6
1896	3
1897	7
1898	6
1899	3
1900	5
1901	8
1902	2
1903	8
1904	12
1905	10
1906	11
1907	26
1908	17
1909	13
1910	18
1911	20
1912	37
1913	32
1914	47
1915	62
1916	45
1917	217
1918	25
1919	82
1920	84
1921	111
1922	227
1923	223
1924	65
1925	184
1926	63
1927	290
1928	31
1929	382
1930	71
1931	509
1932	407
1933	279
1934	206
1935	202
1936	931
1937	234
1938	208
1939	237
1940	397
1941	149
1942	584
1943	165
1944	137
1945	251
1946	584
1947	317
1948	760
1949	206
1950	479
1951	955
1952	334
1953	399
1954	538
1955	254
1956	556
1957	443
1958	525
1959	216
1960	345
1961	389
1962	671
1963	567
1964	537
1965	1,122
1966	403
1967	760
1968	1,391
1969	817
1970	571
1971	1,122
1972	1,052
1973	1,262
1974	564
1975	703
1976	981
1977	795
1978	1,930
1979	427
1980	1,560
1981	684
1982	630
1983	2,765
1984	1,834
1985	568
1986	852
1987	1,270
1988	755
1989	528
1990	3,065
1991	525
1992	1,210
1993	865
1994	642
1995	1,455
1996	1,620
1997	1,384
1998	801
1999	838
2000	1,377
2001	651
2002	1,034
2003	661
2004	974
2005	928
2006	1,779
2007	748
2008	653
2009	933
2010	1,200
2011	782
2012	676
2013	642
2014	660
2015	820
2016	706
2017	1,324
2018	284
2019	1,131
2020	604
2021	1,455
2022	909
2023	726
2024	638
2025	325

Download the Data

Data for records on 1939-12-30: 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 200	185
200 to 400	1
400 to 600	0
600 to 800	0
800 to 1000	0
1000 to 1200	1