Weather Records on 6 December 1939

918 weather records were set or tied worldwide on 6 December 1939. Highest significance: Praha-Klementinum, CZ.

Key Facts for 6 December 1939

On 6 December 1939, 918 weather records were set or tied at long-record stations worldwide.
864 were record highs and 13 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 336 monthly and 582 daily.
Praha-Klementinum set a monthly record daily precipitation of 43.5 mm (1.7 in) on 6 December 1939.
Across 164 earlier years (1804 to 2025) the same calendar date averaged 481 records.

Record Map

918 stations

918 station records on 6 December 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 6 December 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Praha-Klementinum	Czech Republic	Record daily precipitation	43.5 mm (1.7 in)	70 of 100 (Major)
Weissenburg	Germany	Record daily precipitation	32.8 mm (1.3 in)	57 of 100 (Notable)
Gorlitz	Germany	Record daily precipitation	35.9 mm (1.4 in)	51 of 100 (Notable)
Garsebach Bei Meissen	Germany	Record daily precipitation	34.8 mm (1.4 in)	37 of 100 (Notable)
Bad Muskau	Germany	Record daily precipitation	27.3 mm (1.1 in)	33 of 100 (Routine)
Lawrence	United States	Record high maximum temperature	24.4 C (75.9 F)	33 of 100 (Routine)
Aberdeen	United States	Record high maximum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Huron Rgnl AP	United States	Record high maximum temperature	21.7 C (71.1 F)	32 of 100 (Routine)
Ames 3 SW	United States	Record high maximum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Ulysses 3NE	United States	Record high maximum temperature	30.0 C (86.0 F)	31 of 100 (Routine)
Lincoln UNIV Pwr Plt	United States	Record high maximum temperature	23.9 C (75.0 F)	31 of 100 (Routine)
St Cloud State Clg	United States	Record high maximum temperature	17.2 C (63.0 F)	31 of 100 (Routine)
Hohenpeissenberg	Germany	Record daily precipitation	36.1 mm (1.4 in)	30 of 100 (Routine)
Atlantic 1 NE	United States	Record high maximum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Indianola 1SW	United States	Record high maximum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Jefferson	United States	Record high maximum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Hays 1 S	United States	Record high maximum temperature	28.3 C (82.9 F)	30 of 100 (Routine)
Milaca	United States	Record high maximum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Milan 1NW	United States	Record high maximum temperature	22.8 C (73.0 F)	30 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record high maximum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Lexington 3E	United States	Record high maximum temperature	23.3 C (73.9 F)	30 of 100 (Routine)
Augsburg (Sankt Stephan)	Germany	Record daily precipitation	33.1 mm (1.3 in)	29 of 100 (Routine)
Denison	United States	Record high maximum temperature	20.6 C (69.1 F)	29 of 100 (Routine)
Hampton	United States	Record high maximum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Iowa Falls	United States	Record high maximum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Burlington	United States	Record high maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Crookston NW Exp STN	United States	Record high maximum temperature	11.1 C (52.0 F)	29 of 100 (Routine)
Hartington	United States	Record high maximum temperature	22.2 C (72.0 F)	29 of 100 (Routine)
Ipswich	United States	Record high maximum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Winnemucca AP	United States	Record high maximum temperature	16.7 C (62.1 F)	29 of 100 (Routine)
Fichtelberg	Germany	Record daily precipitation	31.5 mm (1.2 in)	28 of 100 (Routine)
Plauen	Germany	Record daily precipitation	30.7 mm (1.2 in)	28 of 100 (Routine)
Decorah	United States	Record high maximum temperature	14.4 C (57.9 F)	28 of 100 (Routine)
Glenwood 3SW	United States	Record high maximum temperature	22.2 C (72.0 F)	28 of 100 (Routine)
Ottumwa 1 WSW	United States	Record high maximum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Emporia 1 S	United States	Record high maximum temperature	25.0 C (77.0 F)	28 of 100 (Routine)
Garden City	United States	Record high maximum temperature	26.1 C (79.0 F)	28 of 100 (Routine)
Larned	United States	Record high maximum temperature	27.8 C (82.0 F)	28 of 100 (Routine)
Beardsley	United States	Record high maximum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
Ravenna	United States	Record high maximum temperature	27.8 C (82.0 F)	28 of 100 (Routine)
Saint Paul	United States	Record high maximum temperature	27.2 C (81.0 F)	28 of 100 (Routine)
Milbank 4 NW	United States	Record high maximum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
Levan	United States	Record high maximum temperature	18.3 C (64.9 F)	28 of 100 (Routine)
Fond du Lac Wwtp	United States	Record high maximum temperature	14.4 C (57.9 F)	28 of 100 (Routine)
Two Buttes	United States	Record high maximum temperature	27.2 C (81.0 F)	27 of 100 (Routine)
Wray	United States	Record high maximum temperature	25.0 C (77.0 F)	27 of 100 (Routine)
Atchison	United States	Record high maximum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Tribune 1W	United States	Record high maximum temperature	25.6 C (78.1 F)	27 of 100 (Routine)
Imperial	United States	Record high maximum temperature	26.1 C (79.0 F)	27 of 100 (Routine)
Lexington	United States	Record high maximum temperature	25.0 C (77.0 F)	27 of 100 (Routine)
Madrid	United States	Record high maximum temperature	25.0 C (77.0 F)	27 of 100 (Routine)
Tecumseh 1S	United States	Record high maximum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Fullerton 1 ESE	United States	Record high maximum temperature	20.0 C (68.0 F)	27 of 100 (Routine)
Lisbon	United States	Record high maximum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Park River	United States	Record high minimum temperature	3.3 C (37.9 F)	27 of 100 (Routine)
Cheyenne Wells 2NE	United States	Record high maximum temperature	31.1 C (88.0 F)	26 of 100 (Routine)
Boone	United States	Record high maximum temperature	22.2 C (72.0 F)	26 of 100 (Routine)
Sibley	United States	Record high maximum temperature	18.9 C (66.0 F)	26 of 100 (Routine)
Leavenworth	United States	Record high maximum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Minneapolis	United States	Record high maximum temperature	27.8 C (82.0 F)	26 of 100 (Routine)

Counts by Type and Timescale

918 records

Records set or tied on 6 December 1939 by type: Highest daily maximum 695, Lowest daily maximum 3, Highest daily minimum 169, Lowest daily minimum 10, Heaviest daily rainfall 41.

Records on 6 December 1939 by type
Record type	Records
Highest daily maximum	695
Lowest daily maximum	3
Highest daily minimum	169
Lowest daily minimum	10
Heaviest daily rainfall	41
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 6 December 1939 by timescale: all-time 0, monthly 336, daily 582.

How Much Records Were Beaten By

780 broken records

Margins by which the 780 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 19.6. Ties are not counted.

Top 20 by Significance

6 December 1939

Top 20 records on 6 December 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
6 December 1939	Praha-Klementinum, CZ	monthly rain	43.5 mm (1.7 in)	6.3 mm (0.25 in)	101 years	70 of 100 (Major)
6 December 1939	Weissenburg, DE	daily rain	32.8 mm (1.3 in)	19.6 mm (0.8 in)	38 years	57 of 100 (Notable)
6 December 1939	Gorlitz, DE	monthly rain	35.9 mm (1.4 in)	10.5 mm (0.4 in)	17 years	51 of 100 (Notable)
6 December 1939	Garsebach Bei Meissen, DE	monthly rain	34.8 mm (1.4 in)	6.5 mm (0.26 in)	16 years	37 of 100 (Notable)
6 December 1939	Bad Muskau, DE	monthly rain	27.3 mm (1.1 in)	4.1 mm (0.16 in)	17 years	33 of 100 (Routine)
6 December 1939	Lawrence, US	monthly high max	24.4 C (75.9 F)	2.2 C (4.0 F)	44 years	33 of 100 (Routine)
6 December 1939	Aberdeen, US	monthly high max	20.6 C (69.1 F)	5.0 C (9.0 F)	45 years	33 of 100 (Routine)
6 December 1939	Huron Rgnl AP, US	monthly high max	21.7 C (71.1 F)	3.4 C (6.1 F)	44 years	32 of 100 (Routine)
6 December 1939	Ames 3 SW, US	monthly high max	18.9 C (66.0 F)	2.8 C (5.0 F)	44 years	31 of 100 (Routine)
6 December 1939	Ulysses 3NE, US	monthly high max	30.0 C (86.0 F)	4.4 C (7.9 F)	38 years	31 of 100 (Routine)
6 December 1939	Lincoln UNIV Pwr Plt, US	monthly high max	23.9 C (75.0 F)	0.6 C (1.1 F)	56 years	31 of 100 (Routine)
6 December 1939	St Cloud State Clg, US	monthly high max	17.2 C (63.0 F)	5.0 C (9.0 F)	34 years	31 of 100 (Routine)
6 December 1939	Hohenpeissenberg, DE	daily rain	36.1 mm (1.4 in)	4.7 mm (0.19 in)	39 years	30 of 100 (Routine)
6 December 1939	Atlantic 1 NE, US	monthly high max	20.6 C (69.1 F)	2.3 C (4.1 F)	44 years	30 of 100 (Routine)
6 December 1939	Indianola 1SW, US	monthly high max	21.1 C (70.0 F)	2.2 C (4.0 F)	44 years	30 of 100 (Routine)
6 December 1939	Jefferson, US	monthly high max	21.1 C (70.0 F)	2.2 C (4.0 F)	44 years	30 of 100 (Routine)
6 December 1939	Hays 1 S, US	monthly high max	28.3 C (82.9 F)	2.7 C (4.9 F)	44 years	30 of 100 (Routine)
6 December 1939	Milaca, US	monthly high max	17.2 C (63.0 F)	4.4 C (7.9 F)	34 years	30 of 100 (Routine)
6 December 1939	Milan 1NW, US	monthly high max	22.8 C (73.0 F)	7.2 C (13.0 F)	25 years	30 of 100 (Routine)
6 December 1939	Morris W Cntrl Rsch & Outreach, US	monthly high max	20.6 C (69.1 F)	8.4 C (15.1 F)	15 years	30 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

1804 to 1939

Records set or tied on this calendar date in each year from 1804 to 1939. 1939 had 918 records.

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

Records on 12-06 in each year
Year	Records
1804	1
1822	1
1825	1
1827	1
1829	2
1832	1
1836	1
1839	1
1840	1
1841	1
1842	1
1844	2
1848	1
1856	2
1859	1
1860	2
1861	1
1862	1
1865	1
1866	1
1868	7
1871	1
1872	1
1875	3
1876	1
1879	5
1880	1
1884	2
1886	3
1888	2
1889	1
1890	1
1891	8
1893	2
1895	3
1896	2
1897	1
1898	4
1899	7
1900	6
1901	5
1902	19
1903	7
1904	13
1905	4
1906	23
1907	10
1908	18
1909	26
1910	35
1911	9
1912	109
1913	14
1914	11
1915	63
1916	25
1917	22
1918	34
1919	30
1920	259
1921	20
1922	150
1923	145
1924	159
1925	189
1926	308
1927	107
1928	98
1929	92
1930	481
1931	178
1932	363
1933	346
1934	185
1935	283
1936	524
1937	958
1938	267
1939	918
1940	264
1941	231
1942	509
1943	378
1944	203
1945	241
1946	657
1947	178
1948	396
1949	137
1950	1,419
1951	1,591
1952	229
1953	533
1954	455
1955	345
1956	1,633
1957	362
1958	640
1959	379
1960	707
1961	197
1962	916
1963	391
1964	597
1965	420
1966	1,013
1967	310
1968	356
1969	810
1970	558
1971	545
1972	2,565
1973	482
1974	549
1975	637
1976	643
1977	1,480
1978	969
1979	809
1980	1,108
1981	937
1982	1,277
1983	1,232
1984	1,245
1985	1,087
1986	695
1987	978
1988	660
1989	798
1990	800
1991	743
1992	1,622
1993	485
1994	1,467
1995	1,456
1996	1,093
1997	953
1998	2,750
1999	1,079
2000	1,230
2001	1,520
2002	1,576
2003	1,303
2004	699
2005	1,233
2006	1,097
2007	1,538
2008	913
2009	866
2010	1,364
2011	1,327
2012	848
2013	2,182
2014	615
2015	768
2016	575
2017	402
2018	469
2019	374
2020	549
2021	676
2022	432
2023	1,271
2024	620
2025	640

Download the Data

Data for records on 1939-12-06: 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 3	452
3 to 5	222
5 to 8	87
8 to 10	15
10 to 13	2
13 to 15	0
15 to 18	1
18 to 20	1