Weather Records on 17 December 1939

1,126 weather records were set or tied worldwide on 17 December 1939. Highest significance: Susendal, NO.

Key Facts for 17 December 1939

On 17 December 1939, 1,126 weather records were set or tied at long-record stations worldwide.
1,064 were record highs and 3 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 40 monthly and 1,084 daily.
Susendal set a monthly record daily precipitation of 45.0 mm (1.8 in) on 17 December 1939.
Across 160 earlier years (1793 to 2025) the same calendar date averaged 459 records.

Record Map

1,126 stations

1,126 station records on 17 December 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 December 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Susendal	Norway	Record daily precipitation	45.0 mm (1.8 in)	66 of 100 (Major)
Kvikkjokk-Arrenjarka	Sweden	Record daily precipitation	26.7 mm (1.1 in)	61 of 100 (Major)
Gaddede	Sweden	Record daily precipitation	40.2 mm (1.6 in)	55 of 100 (Notable)
Drevja	Norway	Record daily precipitation	71.3 mm (2.8 in)	52 of 100 (Notable)
Tustervatnet	Norway	Record daily precipitation	41.9 mm (1.6 in)	49 of 100 (Notable)
Beiarn	Norway	Record daily precipitation	84.8 mm (3.3 in)	44 of 100 (Notable)
Bundarra Post Office	Australia	Record daily precipitation	81.3 mm (3.2 in)	41 of 100 (Notable)
Crows Nest	Australia	Record daily precipitation	54.6 mm (2.1 in)	38 of 100 (Notable)
Sulitjelma	Norway	Record daily precipitation	42.9 mm (1.7 in)	37 of 100 (Notable)
Dunderlandsdalen	Norway	Record daily precipitation	96.5 mm (3.8 in)	37 of 100 (Notable)
Kapskarmo	Norway	Record daily precipitation	107.7 mm (4.2 in)	33 of 100 (Routine)
Coldwater	United States	Record high maximum temperature	26.1 C (79.0 F)	33 of 100 (Routine)
Santa Fe	United States	Record high maximum temperature	15.6 C (60.1 F)	31 of 100 (Routine)
Norton 9SSE	United States	Record high maximum temperature	25.6 C (78.1 F)	30 of 100 (Routine)
Glenwood Spgs #2	United States	Record high maximum temperature	15.6 C (60.1 F)	29 of 100 (Routine)
Soldier Creek Adm Site	United States	Record high maximum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Medicine Lodge	United States	Record high maximum temperature	26.1 C (79.0 F)	29 of 100 (Routine)
Las Vegas 2 NW	United States	Record high maximum temperature	25.6 C (78.1 F)	29 of 100 (Routine)
Cedaredge	United States	Record high maximum temperature	18.3 C (64.9 F)	28 of 100 (Routine)
Salina	United States	Record high maximum temperature	25.6 C (78.1 F)	28 of 100 (Routine)
Santa Fe	United States	Record high minimum temperature	2.8 C (37.0 F)	28 of 100 (Routine)
Passau-Maierhof	Germany	Record snow depth	18.0 cm (7.1 in)	27 of 100 (Routine)
Steamboat Springs	United States	Record high maximum temperature	12.2 C (54.0 F)	27 of 100 (Routine)
Ames 3 SW	United States	Record high maximum temperature	18.3 C (64.9 F)	27 of 100 (Routine)
Newton	United States	Record high maximum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Imperial	United States	Record high maximum temperature	24.4 C (75.9 F)	27 of 100 (Routine)
Carson City	United States	Record high maximum temperature	21.1 C (70.0 F)	27 of 100 (Routine)
Enid	United States	Record high maximum temperature	25.0 C (77.0 F)	27 of 100 (Routine)
Sotchi	Russia	Record daily precipitation	74.3 mm (2.9 in)	26 of 100 (Routine)
Prescott	United States	Record high maximum temperature	23.3 C (73.9 F)	26 of 100 (Routine)
Cuyamaca	United States	Record high maximum temperature	22.8 C (73.0 F)	26 of 100 (Routine)
Norwich	United States	Record high maximum temperature	22.8 C (73.0 F)	26 of 100 (Routine)
Sedan	United States	Record high maximum temperature	25.0 C (77.0 F)	26 of 100 (Routine)
Loup City	United States	Record high maximum temperature	22.8 C (73.0 F)	26 of 100 (Routine)
Madrid	United States	Record high maximum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Cloud Chief 2 SE	United States	Record high maximum temperature	28.3 C (82.9 F)	26 of 100 (Routine)
Stillwater 2 W	United States	Record high maximum temperature	24.4 C (75.9 F)	26 of 100 (Routine)
Loa	United States	Record high maximum temperature	16.1 C (61.0 F)	26 of 100 (Routine)
Scottsbluff W B Heilig Fld AP	United States	Record high maximum temperature	21.1 C (70.0 F)	26 of 100 (Routine)
Krambach (Bellevue)	Australia	Record daily precipitation	38.9 mm (1.5 in)	25 of 100 (Routine)
Toronto	Canada	Record high minimum temperature	3.3 C (37.9 F)	25 of 100 (Routine)
Ft Morgan	United States	Record high maximum temperature	23.3 C (73.9 F)	25 of 100 (Routine)
Holyoke	United States	Record high maximum temperature	23.9 C (75.0 F)	25 of 100 (Routine)
Horton	United States	Record high maximum temperature	21.7 C (71.1 F)	25 of 100 (Routine)
Hutchinson River	United States	Record high maximum temperature	25.6 C (78.1 F)	25 of 100 (Routine)
Austin #2	United States	Record high minimum temperature	2.8 C (37.0 F)	25 of 100 (Routine)
Ft Collins	United States	Record high maximum temperature	20.6 C (69.1 F)	24 of 100 (Routine)
Mackay Lost Rvr Rs	United States	Record high maximum temperature	12.8 C (55.0 F)	24 of 100 (Routine)
Emporia 1 S	United States	Record high maximum temperature	23.3 C (73.9 F)	24 of 100 (Routine)
Jetmore	United States	Record high maximum temperature	26.1 C (79.0 F)	24 of 100 (Routine)
Larned	United States	Record high maximum temperature	26.7 C (80.1 F)	24 of 100 (Routine)
Saint Francis	United States	Record high maximum temperature	25.0 C (77.0 F)	24 of 100 (Routine)
Trenton	United States	Record high maximum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
Fairbury 7S	United States	Record high maximum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
Nebraska City 1 NW	United States	Record high maximum temperature	22.2 C (72.0 F)	24 of 100 (Routine)
Waukomis	United States	Record high maximum temperature	24.4 C (75.9 F)	24 of 100 (Routine)
Vale	United States	Record high maximum temperature	13.3 C (55.9 F)	24 of 100 (Routine)
Milwaukee Wb City	United States	Record high maximum temperature	10.6 C (51.1 F)	24 of 100 (Routine)
Bedford 2 SE	United States	Record high maximum temperature	12.2 C (54.0 F)	24 of 100 (Routine)
Thermopolis	United States	Record high maximum temperature	18.3 C (64.9 F)	24 of 100 (Routine)

Counts by Type and Timescale

1,126 records

Records set or tied on 17 December 1939 by type: Highest daily maximum 666, Lowest daily maximum 3, Highest daily minimum 398, Heaviest daily rainfall 55, Heaviest daily snowfall 1, Deepest snow cover 3.

Records on 17 December 1939 by type
Record type	Records
Highest daily maximum	666
Lowest daily maximum	3
Highest daily minimum	398
Lowest daily minimum	0
Heaviest daily rainfall	55
Heaviest daily snowfall	1
Deepest snow cover	3

Records on 17 December 1939 by timescale: all-time 2, monthly 40, daily 1,084.

How Much Records Were Beaten By

953 broken records

Margins by which the 953 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 55.6. Ties are not counted.

Top 20 by Significance

17 December 1939

Top 20 records on 17 December 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 December 1939	Susendal, NO	monthly rain	45.0 mm (1.8 in)	19.5 mm (0.8 in)	40 years	66 of 100 (Major)
17 December 1939	Kvikkjokk-Arrenjarka, SE	monthly rain	26.7 mm (1.1 in)	10.2 mm (0.4 in)	24 years	61 of 100 (Major)
17 December 1939	Gaddede, SE	monthly rain	40.2 mm (1.6 in)	20.3 mm (0.8 in)	9 years	55 of 100 (Notable)
17 December 1939	Drevja, NO	daily rain	71.3 mm (2.8 in)	44.9 mm (1.8 in)	32 years	52 of 100 (Notable)
17 December 1939	Tustervatnet, NO	daily rain	41.9 mm (1.6 in)	19.9 mm (0.8 in)	38 years	49 of 100 (Notable)
17 December 1939	Beiarn, NO	daily rain	84.8 mm (3.3 in)	55.6 mm (2.2 in)	5 years	44 of 100 (Notable)
17 December 1939	Bundarra Post Office, AU	daily rain	81.3 mm (3.2 in)	25.4 mm (1.0 in)	51 years	41 of 100 (Notable)
17 December 1939	Crows Nest, AU	daily rain	54.6 mm (2.1 in)	25.1 mm (1.0 in)	44 years	38 of 100 (Notable)
17 December 1939	Sulitjelma, NO	daily rain	42.9 mm (1.7 in)	20.5 mm (0.8 in)	34 years	37 of 100 (Notable)
17 December 1939	Dunderlandsdalen, NO	all-time rain	96.5 mm (3.8 in)	6.0 mm (0.24 in)	27 years	37 of 100 (Notable)
17 December 1939	Kapskarmo, NO	all-time rain	107.7 mm (4.2 in)	0.2 mm (0.01 in)	32 years	33 of 100 (Routine)
17 December 1939	Coldwater, US	daily high max	26.1 C (79.0 F)	11.1 C (20.0 F)	45 years	33 of 100 (Routine)
17 December 1939	Santa Fe, US	daily high max	15.6 C (60.1 F)	4.5 C (8.1 F)	54 years	31 of 100 (Routine)
17 December 1939	Norton 9SSE, US	daily high max	25.6 C (78.1 F)	12.3 C (22.1 F)	36 years	30 of 100 (Routine)
17 December 1939	Glenwood Spgs #2, US	daily high max	15.6 C (60.1 F)	5.6 C (10.1 F)	45 years	29 of 100 (Routine)
17 December 1939	Soldier Creek Adm Site, US	daily high max	16.1 C (61.0 F)	7.2 C (13.0 F)	33 years	29 of 100 (Routine)
17 December 1939	Medicine Lodge, US	daily high max	26.1 C (79.0 F)	10.0 C (18.0 F)	38 years	29 of 100 (Routine)
17 December 1939	Las Vegas 2 NW, US	daily high max	25.6 C (78.1 F)	7.3 C (13.1 F)	44 years	29 of 100 (Routine)
17 December 1939	Cedaredge, US	daily high max	18.3 C (64.9 F)	6.6 C (11.9 F)	38 years	28 of 100 (Routine)
17 December 1939	Salina, US	daily high max	25.6 C (78.1 F)	9.5 C (17.1 F)	38 years	28 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 1939

Records set or tied on this calendar date in each year from 1793 to 1939. 1939 had 1,126 records.

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

Records on 12-17 in each year
Year	Records
1793	2
1796	1
1806	2
1808	2
1814	1
1815	1
1839	1
1845	1
1846	4
1847	1
1848	1
1859	3
1866	1
1867	1
1868	1
1869	2
1873	2
1876	3
1877	2
1878	1
1879	2
1881	2
1885	1
1886	1
1888	2
1889	2
1890	4
1892	4
1893	2
1894	4
1895	3
1896	4
1897	4
1898	2
1899	1
1900	6
1901	5
1902	47
1903	2
1904	14
1905	2
1906	17
1907	9
1908	13
1909	5
1910	37
1911	12
1912	15
1913	21
1914	17
1915	31
1916	21
1917	21
1918	21
1919	109
1920	97
1921	94
1922	120
1923	170
1924	505
1925	79
1926	172
1927	143
1928	359
1929	221
1930	362
1931	217
1932	684
1933	710
1934	200
1935	87
1936	504
1937	379
1938	118
1939	1,126
1940	248
1941	261
1942	507
1943	444
1944	189
1945	621
1946	207
1947	258
1948	316
1949	296
1950	294
1951	773
1952	277
1953	283
1954	409
1955	419
1956	448
1957	686
1958	540
1959	548
1960	492
1961	911
1962	676
1963	531
1964	1,239
1965	482
1966	516
1967	1,121
1968	338
1969	238
1970	820
1971	781
1972	601
1973	1,016
1974	390
1975	474
1976	507
1977	1,024
1978	710
1979	951
1980	1,116
1981	1,354
1982	569
1983	1,264
1984	1,618
1985	1,210
1986	743
1987	1,191
1988	481
1989	2,905
1990	866
1991	577
1992	1,461
1993	761
1994	685
1995	956
1996	1,212
1997	1,279
1998	695
1999	901
2000	1,566
2001	1,262
2002	858
2003	751
2004	554
2005	806
2006	1,307
2007	1,100
2008	1,354
2009	926
2010	1,405
2011	430
2012	942
2013	718
2014	370
2015	1,378
2016	1,521
2017	408
2018	498
2019	917
2020	768
2021	908
2022	595
2023	931
2024	560
2025	1,198

Download the Data

Data for records on 1939-12-17: 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).

Histogram of margins by which records were beaten on 17 December 1939
Margin	Records
0 to 10	923
10 to 20	21
20 to 30	5
30 to 40	1
40 to 50	1
50 to 60	2