Weather Records on 9 December 1939

1,030 weather records were set or tied worldwide on 9 December 1939. Highest significance: Yonna, US.

Key Facts for 9 December 1939

On 9 December 1939, 1,030 weather records were set or tied at long-record stations worldwide.
981 were record highs and 10 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 89 monthly and 940 daily.
Yonna set an all-time record daily precipitation of 69.6 mm (2.7 in) on 9 December 1939.
Across 157 earlier years (1796 to 2025) the same calendar date averaged 472 records.

Record Map

1,030 stations

1,030 station records on 9 December 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 December 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Yonna	United States	Record daily precipitation	69.6 mm (2.7 in)	66 of 100 (Major)
Klamath Falls 2 SSW	United States	Record daily precipitation	55.9 mm (2.2 in)	55 of 100 (Notable)
Grants Pass	United States	Record daily precipitation	78.5 mm (3.1 in)	40 of 100 (Notable)
Orleans	United States	Record daily precipitation	93.2 mm (3.7 in)	36 of 100 (Notable)
N Bend SW Oregon Rgnl AP	United States	Record daily precipitation	77.0 mm (3.0 in)	36 of 100 (Notable)
Haenertsburg (Pol)	South Africa	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Nevada City	United States	Record high minimum temperature	11.1 C (52.0 F)	31 of 100 (Routine)
Represa	United States	Record high minimum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record high maximum temperature	13.9 C (57.0 F)	29 of 100 (Routine)
Raton	United States	Record high maximum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
Mayville	United States	Record high minimum temperature	3.9 C (39.0 F)	28 of 100 (Routine)
Fillmore	United States	Record high maximum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Laketown	United States	Record high maximum temperature	16.1 C (61.0 F)	28 of 100 (Routine)
Oroville 1 N	United States	Record high minimum temperature	13.9 C (57.0 F)	27 of 100 (Routine)
Maple Plain	United States	Record high maximum temperature	16.1 C (61.0 F)	27 of 100 (Routine)
Evanston 1 E	United States	Record high maximum temperature	15.6 C (60.1 F)	27 of 100 (Routine)
Plauen	Germany	Record snow depth	18.0 cm (7.1 in)	26 of 100 (Routine)
Dobbins Colgate Foreba	United States	Record high minimum temperature	14.4 C (57.9 F)	26 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record high maximum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
Garsebach Bei Meissen	Germany	Record snow depth	13.0 cm (5.1 in)	25 of 100 (Routine)
Verwoedburg-Mu"Lytteltn"	South Africa	Record daily precipitation	50.0 mm (2.0 in)	25 of 100 (Routine)
Sveg	Sweden	Record low maximum temperature	-25.8 C (-14.4 F)	25 of 100 (Routine)
Auburn	United States	Record high minimum temperature	13.3 C (55.9 F)	25 of 100 (Routine)
Ft Bidwell	United States	Record high minimum temperature	5.6 C (42.1 F)	25 of 100 (Routine)
Twin Falls 2 NNE	United States	Record high minimum temperature	7.2 C (45.0 F)	25 of 100 (Routine)
Fairmont	United States	Record high maximum temperature	18.9 C (66.0 F)	25 of 100 (Routine)
Milbank 4 NW	United States	Record high minimum temperature	4.4 C (39.9 F)	25 of 100 (Routine)
Sheboygan	United States	Record high maximum temperature	14.4 C (57.9 F)	25 of 100 (Routine)
Russell	Canada	Record high minimum temperature	-2.2 C (28.0 F)	24 of 100 (Routine)
Represa	United States	Record high maximum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
Montevideo 1SW	United States	Record high maximum temperature	16.7 C (62.1 F)	24 of 100 (Routine)
Beaver City	United States	Record high maximum temperature	23.9 C (75.0 F)	24 of 100 (Routine)
Lisbon	United States	Record high minimum temperature	2.8 C (37.0 F)	24 of 100 (Routine)
Willow City	United States	Record high maximum temperature	13.9 C (57.0 F)	24 of 100 (Routine)
Huron Rgnl AP	United States	Record high maximum temperature	17.8 C (64.0 F)	24 of 100 (Routine)
Crescent City 3 NNW	United States	Record daily precipitation	80.8 mm (3.2 in)	23 of 100 (Routine)
Payette	United States	Record high minimum temperature	6.1 C (43.0 F)	23 of 100 (Routine)
Collegeville St John's	United States	Record high minimum temperature	3.9 C (39.0 F)	23 of 100 (Routine)
Genoa 2 W	United States	Record high maximum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Kimball 2NE	United States	Record high maximum temperature	22.2 C (72.0 F)	23 of 100 (Routine)
La Crosse Wb City	United States	Record high maximum temperature	11.7 C (53.1 F)	23 of 100 (Routine)
Milwaukee Wb City	United States	Record high maximum temperature	13.3 C (55.9 F)	23 of 100 (Routine)
Nogales	United States	Record high minimum temperature	6.7 C (44.1 F)	22 of 100 (Routine)
Idaho City	United States	Record high minimum temperature	3.3 C (37.9 F)	22 of 100 (Routine)
Marengo	United States	Record high maximum temperature	13.9 C (57.0 F)	22 of 100 (Routine)
Sycamore	United States	Record high maximum temperature	14.4 C (57.9 F)	22 of 100 (Routine)
Decorah	United States	Record high maximum temperature	13.9 C (57.0 F)	22 of 100 (Routine)
Newberry-Luce Co Rd Commission	United States	Record high maximum temperature	11.7 C (53.1 F)	22 of 100 (Routine)
New London	United States	Record high maximum temperature	15.0 C (59.0 F)	22 of 100 (Routine)
Santa Fe	United States	Record high minimum temperature	3.3 C (37.9 F)	22 of 100 (Routine)
Towner 2 NE	United States	Record high maximum temperature	16.7 C (62.1 F)	22 of 100 (Routine)
Willow City	United States	Record high minimum temperature	-0.6 C (30.9 F)	22 of 100 (Routine)
Centennial 1NE	United States	Record high maximum temperature	12.8 C (55.0 F)	22 of 100 (Routine)
Laramie	United States	Record high maximum temperature	15.6 C (60.1 F)	22 of 100 (Routine)
Concordia ASOS	United States	Record high maximum temperature	20.6 C (69.1 F)	22 of 100 (Routine)
Scottsbluff W B Heilig Fld AP	United States	Record high maximum temperature	21.1 C (70.0 F)	22 of 100 (Routine)
Qu'appelle	Canada	Record high maximum temperature	8.9 C (48.0 F)	21 of 100 (Routine)
Port Arthur	Canada	Record high maximum temperature	7.8 C (46.0 F)	21 of 100 (Routine)
Tobolsk	Russia	Record high minimum temperature	-4.6 C (23.7 F)	21 of 100 (Routine)
Indio Fire STN	United States	Record high minimum temperature	15.0 C (59.0 F)	21 of 100 (Routine)

Counts by Type and Timescale

1,030 records

Records set or tied on 9 December 1939 by type: Highest daily maximum 640, Lowest daily maximum 6, Highest daily minimum 341, Lowest daily minimum 4, Heaviest daily rainfall 33, Heaviest daily snowfall 2, Deepest snow cover 4.

Records on 9 December 1939 by type
Record type	Records
Highest daily maximum	640
Lowest daily maximum	6
Highest daily minimum	341
Lowest daily minimum	4
Heaviest daily rainfall	33
Heaviest daily snowfall	2
Deepest snow cover	4

Records on 9 December 1939 by timescale: all-time 1, monthly 89, daily 940.

How Much Records Were Beaten By

845 broken records

Margins by which the 845 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 80.0. Ties are not counted.

Top 20 by Significance

9 December 1939

Top 20 records on 9 December 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 December 1939	Yonna, US	all-time rain	69.6 mm (2.7 in)	21.1 mm (0.8 in)	11 years	66 of 100 (Major)
9 December 1939	Klamath Falls 2 SSW, US	monthly rain	55.9 mm (2.2 in)	17.8 mm (0.7 in)	37 years	55 of 100 (Notable)
9 December 1939	Grants Pass, US	monthly rain	78.5 mm (3.1 in)	17.3 mm (0.7 in)	34 years	40 of 100 (Notable)
9 December 1939	Orleans, US	daily rain	93.2 mm (3.7 in)	45.2 mm (1.8 in)	10 years	36 of 100 (Notable)
9 December 1939	N Bend SW Oregon Rgnl AP, US	daily rain	77.0 mm (3.0 in)	40.2 mm (1.6 in)	9 years	36 of 100 (Notable)
9 December 1939	Haenertsburg (Pol), ZA	daily rain	50.8 mm (2.0 in)	36.8 mm (1.4 in)	13 years	31 of 100 (Routine)
9 December 1939	Nevada City, US	monthly high min	11.1 C (52.0 F)	1.7 C (3.1 F)	46 years	31 of 100 (Routine)
9 December 1939	Represa, US	monthly high min	17.8 C (64.0 F)	3.4 C (6.1 F)	25 years	31 of 100 (Routine)
9 December 1939	Dublin Phoenix Park, IE	daily high max	13.9 C (57.0 F)	0.5 C (0.9 F)	70 years	29 of 100 (Routine)
9 December 1939	Raton, US	monthly high max	22.8 C (73.0 F)	0.6 C (1.1 F)	43 years	28 of 100 (Routine)
9 December 1939	Mayville, US	monthly high min	3.9 C (39.0 F)	2.8 C (5.0 F)	39 years	28 of 100 (Routine)
9 December 1939	Fillmore, US	monthly high max	20.0 C (68.0 F)	0.6 C (1.1 F)	46 years	28 of 100 (Routine)
9 December 1939	Laketown, US	monthly high max	16.1 C (61.0 F)	1.7 C (3.1 F)	38 years	28 of 100 (Routine)
9 December 1939	Oroville 1 N, US	monthly high min	13.9 C (57.0 F)	0.6 C (1.1 F)	42 years	27 of 100 (Routine)
9 December 1939	Maple Plain, US	daily high max	16.1 C (61.0 F)	7.8 C (14.0 F)	41 years	27 of 100 (Routine)
9 December 1939	Evanston 1 E, US	daily high max	15.6 C (60.1 F)	6.2 C (11.2 F)	36 years	27 of 100 (Routine)
9 December 1939	Plauen, DE	daily snow depth	18.0 cm (7.1 in)	8.0 cm (3.1 in)	20 years	26 of 100 (Routine)
9 December 1939	Dobbins Colgate Foreba, US	monthly high min	14.4 C (57.9 F)	1.1 C (2.0 F)	36 years	26 of 100 (Routine)
9 December 1939	Morris W Cntrl Rsch & Outreach, US	daily high max	15.6 C (60.1 F)	5.0 C (9.0 F)	50 years	26 of 100 (Routine)
9 December 1939	Garsebach Bei Meissen, DE	daily snow depth	13.0 cm (5.1 in)	7.0 cm (2.8 in)	16 years	25 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 1,030 records.

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

Records on 12-09 in each year
Year	Records
1796	1
1820	1
1825	3
1831	1
1844	1
1856	1
1860	1
1862	1
1867	2
1868	1
1869	1
1871	3
1872	1
1873	2
1876	2
1878	4
1879	9
1880	1
1882	3
1883	1
1885	2
1886	2
1887	1
1889	1
1891	3
1893	1
1894	1
1895	3
1896	1
1897	4
1898	3
1899	5
1900	1
1901	4
1902	18
1903	7
1904	2
1905	9
1906	15
1907	28
1908	5
1909	18
1910	36
1911	31
1912	18
1913	37
1914	57
1915	139
1916	366
1917	106
1918	40
1919	58
1920	221
1921	58
1922	311
1923	203
1924	164
1925	93
1926	113
1927	356
1928	110
1929	192
1930	211
1931	434
1932	339
1933	250
1934	364
1935	263
1936	143
1937	348
1938	329
1939	1,030
1940	251
1941	144
1942	370
1943	496
1944	327
1945	178
1946	1,308
1947	303
1948	278
1949	299
1950	382
1951	849
1952	553
1953	347
1954	226
1955	352
1956	672
1957	565
1958	678
1959	217
1960	426
1961	818
1962	377
1963	642
1964	547
1965	706
1966	968
1967	639
1968	482
1969	347
1970	987
1971	655
1972	1,776
1973	679
1974	629
1975	668
1976	868
1977	1,548
1978	2,060
1979	693
1980	760
1981	748
1982	589
1983	664
1984	588
1985	1,074
1986	658
1987	1,007
1988	939
1989	1,270
1990	844
1991	878
1992	791
1993	912
1994	1,071
1995	1,247
1996	946
1997	1,214
1998	769
1999	774
2000	920
2001	505
2002	1,052
2003	824
2004	1,108
2005	1,714
2006	1,718
2007	1,124
2008	1,052
2009	2,442
2010	1,726
2011	496
2012	753
2013	1,018
2014	510
2015	1,054
2016	679
2017	715
2018	626
2019	614
2020	571
2021	674
2022	666
2023	907
2024	422
2025	1,602

Download the Data

Data for records on 1939-12-09: 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	830
10 to 20	5
20 to 30	2
30 to 40	3
40 to 50	2
50 to 60	0
60 to 70	1
70 to 80	2