Weather Records on 4 December 1939

443 weather records were set or tied worldwide on 4 December 1939. Highest significance: Kentani (Bos), ZA.

Key Facts for 4 December 1939

On 4 December 1939, 443 weather records were set or tied at long-record stations worldwide.
406 were record highs and 6 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 55 monthly and 388 daily.
Kentani (Bos) set a daily record precipitation of 97.5 mm (3.8 in) on 4 December 1939.
Across 166 earlier years (1796 to 2025) the same calendar date averaged 464 records.

Record Map

443 stations

443 station records on 4 December 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 December 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kentani (Bos)	South Africa	Record daily precipitation	97.5 mm (3.8 in)	54 of 100 (Notable)
Olympia Priest Pt Park	United States	Record high maximum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Quatsino	Canada	Record high maximum temperature	14.4 C (57.9 F)	32 of 100 (Routine)
Sedro-Woolley	United States	Record high maximum temperature	22.2 C (72.0 F)	32 of 100 (Routine)
Weston 2 SE	United States	Record high maximum temperature	23.3 C (73.9 F)	31 of 100 (Routine)
Astoria	United States	Record high maximum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Seattle Urban Site	United States	Record high maximum temperature	18.3 C (64.9 F)	29 of 100 (Routine)
Lakeview 2 NNW	United States	Record high maximum temperature	19.4 C (66.9 F)	28 of 100 (Routine)
Highmore	United States	Record high minimum temperature	6.1 C (43.0 F)	28 of 100 (Routine)
Fort Macleod	Canada	Record high maximum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Blaine	United States	Record high maximum temperature	16.7 C (62.1 F)	26 of 100 (Routine)
Rosalia	United States	Record high maximum temperature	15.0 C (59.0 F)	26 of 100 (Routine)
South Pass City	United States	Record high maximum temperature	13.3 C (55.9 F)	26 of 100 (Routine)
Sydney (Observatory Hill)	Australia	Record high maximum temperature	36.6 C (97.9 F)	25 of 100 (Routine)
Indian Head Cda	Canada	Record high maximum temperature	10.0 C (50.0 F)	25 of 100 (Routine)
Sacramento 5 ESE	United States	Record high maximum temperature	18.9 C (66.0 F)	25 of 100 (Routine)
Vancouver Pmo	Canada	Record high maximum temperature	14.4 C (57.9 F)	24 of 100 (Routine)
San Diego Wbo	United States	Record high maximum temperature	26.1 C (79.0 F)	24 of 100 (Routine)
Willapa Harbor	United States	Record high maximum temperature	19.4 C (66.9 F)	24 of 100 (Routine)
Oakley	United States	Record high maximum temperature	22.2 C (72.0 F)	23 of 100 (Routine)
Park City G.C.	United States	Record high maximum temperature	13.9 C (57.0 F)	23 of 100 (Routine)
Tiaro	Australia	Record daily precipitation	49.0 mm (1.9 in)	22 of 100 (Routine)
Ranfurly	Canada	Record high minimum temperature	1.1 C (34.0 F)	22 of 100 (Routine)
Chaplin	Canada	Record high maximum temperature	12.8 C (55.0 F)	22 of 100 (Routine)
Steveston	Canada	Record high maximum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Lacombe Cda	Canada	Record high maximum temperature	15.6 C (60.1 F)	21 of 100 (Routine)
Banff	Canada	Record high maximum temperature	8.3 C (46.9 F)	21 of 100 (Routine)
Crosby	United States	Record high maximum temperature	12.8 C (55.0 F)	21 of 100 (Routine)
Centralia	United States	Record high minimum temperature	12.8 C (55.0 F)	21 of 100 (Routine)
Snoqualmie Falls	United States	Record high maximum temperature	17.2 C (63.0 F)	21 of 100 (Routine)
Williston Sloulin Fld	United States	Record high maximum temperature	13.9 C (57.0 F)	21 of 100 (Routine)
Victoria Gonzales Hts	Canada	Record high minimum temperature	8.9 C (48.0 F)	20 of 100 (Routine)
St Georges	Canada	Record high maximum temperature	10.6 C (51.1 F)	20 of 100 (Routine)
Ft Collins	United States	Record high maximum temperature	20.6 C (69.1 F)	20 of 100 (Routine)
Gunnison 3SW	United States	Record high maximum temperature	13.9 C (57.0 F)	20 of 100 (Routine)
Cambridge	United States	Record high maximum temperature	12.8 C (55.0 F)	20 of 100 (Routine)
Mtn Home	United States	Record high maximum temperature	16.7 C (62.1 F)	20 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record high maximum temperature	8.3 C (46.9 F)	20 of 100 (Routine)
Chama	United States	Record high maximum temperature	18.9 C (66.0 F)	20 of 100 (Routine)
Riverside 7 SSW	United States	Record high maximum temperature	12.8 C (55.0 F)	20 of 100 (Routine)
New Westminster	Canada	Record high maximum temperature	15.0 C (59.0 F)	19 of 100 (Routine)
Alix	Canada	Record high minimum temperature	3.3 C (37.9 F)	19 of 100 (Routine)
Banff	Canada	Record high minimum temperature	3.3 C (37.9 F)	19 of 100 (Routine)
Dunvegan	Canada	Record high minimum temperature	0.0 C (32.0 F)	19 of 100 (Routine)
Hypoluxo	United States	Record low minimum temperature	2.8 C (37.0 F)	19 of 100 (Routine)
Marianna Sch For Boys	United States	Record low maximum temperature	11.7 C (53.1 F)	19 of 100 (Routine)
Shoshone 1 WNW	United States	Record high maximum temperature	15.0 C (59.0 F)	19 of 100 (Routine)
Wallace	United States	Record high maximum temperature	11.1 C (52.0 F)	19 of 100 (Routine)
Westhope	United States	Record high maximum temperature	16.1 C (61.0 F)	19 of 100 (Routine)
Heber	United States	Record high maximum temperature	16.1 C (61.0 F)	19 of 100 (Routine)
Moose Jaw Chab	Canada	Record high maximum temperature	13.3 C (55.9 F)	18 of 100 (Routine)
Ashton 1N	United States	Record high maximum temperature	13.3 C (55.9 F)	18 of 100 (Routine)
New Meadows Rs	United States	Record high maximum temperature	10.6 C (51.1 F)	18 of 100 (Routine)
Collegeville St John's	United States	Record high maximum temperature	9.4 C (48.9 F)	18 of 100 (Routine)
Malta	United States	Record high maximum temperature	16.7 C (62.1 F)	18 of 100 (Routine)
Miles City	United States	Record high maximum temperature	18.3 C (64.9 F)	18 of 100 (Routine)
Savage	United States	Record high maximum temperature	16.1 C (61.0 F)	18 of 100 (Routine)
Granville	United States	Record high maximum temperature	13.9 C (57.0 F)	18 of 100 (Routine)
Prospect 2 SW	United States	Record high maximum temperature	18.9 C (66.0 F)	18 of 100 (Routine)
Levan	United States	Record high maximum temperature	15.6 C (60.1 F)	18 of 100 (Routine)

Counts by Type and Timescale

443 records

Records set or tied on 4 December 1939 by type: Highest daily maximum 288, Lowest daily maximum 3, Highest daily minimum 118, Lowest daily minimum 3, Heaviest daily rainfall 29, Heaviest daily snowfall 2.

Records on 4 December 1939 by type
Record type	Records
Highest daily maximum	288
Lowest daily maximum	3
Highest daily minimum	118
Lowest daily minimum	3
Heaviest daily rainfall	29
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 4 December 1939 by timescale: all-time 0, monthly 55, daily 388.

How Much Records Were Beaten By

347 broken records

Margins by which the 347 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.0. Ties are not counted.

Top 20 by Significance

4 December 1939

Top 20 records on 4 December 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 December 1939	Kentani (Bos), ZA	daily rain	97.5 mm (3.8 in)	65.0 mm (2.6 in)	32 years	54 of 100 (Notable)
4 December 1939	Olympia Priest Pt Park, US	daily high max	17.8 C (64.0 F)	3.9 C (7.0 F)	50 years	33 of 100 (Routine)
4 December 1939	Quatsino, CA	monthly high max	14.4 C (57.9 F)	1.6 C (2.9 F)	43 years	32 of 100 (Routine)
4 December 1939	Sedro-Woolley, US	monthly high max	22.2 C (72.0 F)	2.8 C (5.0 F)	38 years	32 of 100 (Routine)
4 December 1939	Weston 2 SE, US	monthly high max	23.3 C (73.9 F)	3.9 C (7.0 F)	38 years	31 of 100 (Routine)
4 December 1939	Astoria, US	monthly high max	17.2 C (63.0 F)	0.5 C (0.9 F)	47 years	30 of 100 (Routine)
4 December 1939	Seattle Urban Site, US	monthly high max	18.3 C (64.9 F)	1.6 C (2.9 F)	38 years	29 of 100 (Routine)
4 December 1939	Lakeview 2 NNW, US	monthly high max	19.4 C (66.9 F)	1.1 C (2.0 F)	39 years	28 of 100 (Routine)
4 December 1939	Highmore, US	monthly high min	6.1 C (43.0 F)	2.8 C (5.0 F)	39 years	28 of 100 (Routine)
4 December 1939	Fort Macleod, CA	daily high max	17.8 C (64.0 F)	3.4 C (6.1 F)	62 years	27 of 100 (Routine)
4 December 1939	Blaine, US	monthly high max	16.7 C (62.1 F)	1.1 C (2.0 F)	32 years	26 of 100 (Routine)
4 December 1939	Rosalia, US	monthly high max	15.0 C (59.0 F)	0.6 C (1.1 F)	38 years	26 of 100 (Routine)
4 December 1939	South Pass City, US	monthly high max	13.3 C (55.9 F)	1.1 C (2.0 F)	34 years	26 of 100 (Routine)
4 December 1939	Sydney (Observatory Hill), AU	daily high max	36.6 C (97.9 F)	2.4 C (4.3 F)	38 years	25 of 100 (Routine)
4 December 1939	Indian Head Cda, CA	monthly high max	10.0 C (50.0 F)	1.1 C (2.0 F)	31 years	25 of 100 (Routine)
4 December 1939	Sacramento 5 ESE, US	daily high max	18.9 C (66.0 F)	0.6 C (1.1 F)	60 years	25 of 100 (Routine)
4 December 1939	Vancouver Pmo, CA	monthly high max	14.4 C (57.9 F)	0.5 C (0.9 F)	32 years	24 of 100 (Routine)
4 December 1939	San Diego Wbo, US	daily high max	26.1 C (79.0 F)	0.5 C (0.9 F)	56 years	24 of 100 (Routine)
4 December 1939	Willapa Harbor, US	daily high max	19.4 C (66.9 F)	3.8 C (6.8 F)	30 years	24 of 100 (Routine)
4 December 1939	Oakley, US	monthly high max	22.2 C (72.0 F)	4.4 C (7.9 F)	5 years	23 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

1796 to 1939

Records set or tied on this calendar date in each year from 1796 to 1939. 1939 had 443 records.

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

Records on 12-04 in each year
Year	Records
1796	2
1797	1
1810	2
1823	1
1829	2
1846	1
1847	1
1849	1
1850	1
1852	3
1854	1
1855	5
1856	2
1858	1
1859	1
1860	1
1861	1
1865	1
1866	1
1867	1
1868	2
1870	3
1872	1
1873	1
1875	2
1876	1
1878	1
1879	7
1882	3
1883	2
1885	1
1886	4
1887	1
1888	1
1889	1
1891	4
1892	9
1896	2
1897	5
1898	9
1899	3
1900	13
1901	7
1902	15
1903	7
1904	6
1905	16
1906	25
1907	5
1908	8
1909	45
1910	7
1911	27
1912	46
1913	59
1914	61
1915	61
1916	95
1917	31
1918	27
1919	94
1920	54
1921	60
1922	72
1923	142
1924	129
1925	266
1926	174
1927	184
1928	143
1929	432
1930	221
1931	411
1932	265
1933	524
1934	149
1935	330
1936	637
1937	148
1938	275
1939	443
1940	600
1941	1,326
1942	450
1943	259
1944	377
1945	332
1946	515
1947	577
1948	504
1949	120
1950	852
1951	583
1952	269
1953	738
1954	689
1955	811
1956	692
1957	350
1958	529
1959	212
1960	628
1961	570
1962	574
1963	285
1964	1,195
1965	590
1966	1,047
1967	428
1968	775
1969	366
1970	933
1971	768
1972	1,973
1973	1,124
1974	651
1975	757
1976	669
1977	654
1978	1,582
1979	943
1980	976
1981	638
1982	2,138
1983	1,284
1984	796
1985	1,239
1986	549
1987	624
1988	764
1989	1,541
1990	1,164
1991	1,178
1992	1,075
1993	708
1994	1,029
1995	972
1996	684
1997	654
1998	2,549
1999	930
2000	895
2001	974
2002	1,478
2003	595
2004	721
2005	1,075
2006	1,510
2007	1,005
2008	652
2009	1,114
2010	1,874
2011	1,252
2012	1,482
2013	1,227
2014	629
2015	428
2016	533
2017	607
2018	563
2019	522
2020	424
2021	942
2022	437
2023	736
2024	590
2025	535

Download the Data

Data for records on 1939-12-04: 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 10	341
10 to 20	2
20 to 30	3
30 to 40	0
40 to 50	0
50 to 60	0
60 to 70	1