Weather Records on 20 December 2017

688 weather records were set or tied worldwide on 20 December 2017. Highest significance: Jefferson, US.

Key Facts for 20 December 2017

On 20 December 2017, 688 weather records were set or tied at long-record stations worldwide.
338 were record highs and 42 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 23 monthly and 662 daily.
Jefferson set a daily record precipitation of 107.7 mm (4.2 in) on 20 December 2017.
Across 163 earlier years (1793 to 2025) the same calendar date averaged 466 records.

Record Map

688 stations

688 station records on 20 December 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 December 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Jefferson	United States	Record daily precipitation	107.7 mm (4.2 in)	75 of 100 (Major)
Waihee Vly 482	United States	Record daily precipitation	232.4 mm (9.1 in)	71 of 100 (Major)
Water Valley	United States	Record daily precipitation	80.0 mm (3.1 in)	68 of 100 (Major)
Plain Dealing	United States	Record daily precipitation	119.9 mm (4.7 in)	65 of 100 (Major)
Cleveland	United States	Record daily precipitation	112.8 mm (4.4 in)	65 of 100 (Major)
Hungry Horse Dam	United States	Record daily precipitation	41.4 mm (1.6 in)	65 of 100 (Major)
Adak AP	United States	Record daily precipitation	73.9 mm (2.9 in)	62 of 100 (Major)
Longview	United States	Record daily precipitation	86.4 mm (3.4 in)	59 of 100 (Notable)
Kahului AP	United States	Record daily precipitation	162.6 mm (6.4 in)	57 of 100 (Notable)
Brady 27 ENE (the Knees)	United States	Record daily precipitation	30.7 mm (1.2 in)	56 of 100 (Notable)
Paris	United States	Record daily precipitation	58.9 mm (2.3 in)	56 of 100 (Notable)
Nicholson	Australia	Record daily precipitation	80.4 mm (3.2 in)	53 of 100 (Notable)
Fordyce	United States	Record daily precipitation	109.2 mm (4.3 in)	53 of 100 (Notable)
Coffeeville	United States	Record daily precipitation	87.4 mm (3.4 in)	53 of 100 (Notable)
Rohwer 2 NNE	United States	Record daily precipitation	123.7 mm (4.9 in)	52 of 100 (Notable)
Stuttgart 9 ESE	United States	Record daily precipitation	73.7 mm (2.9 in)	52 of 100 (Notable)
Greenville Kgvl Radio	United States	Record daily precipitation	70.4 mm (2.8 in)	52 of 100 (Notable)
Atlanta	United States	Record daily precipitation	113.8 mm (4.5 in)	51 of 100 (Notable)
Dermott 3 NE	United States	Record daily precipitation	97.8 mm (3.9 in)	50 of 100 (Notable)
Lalbert	Australia	Record daily precipitation	25.4 mm (1.0 in)	48 of 100 (Notable)
Prescott 2 NNW	United States	Record daily precipitation	69.3 mm (2.7 in)	48 of 100 (Notable)
Content 4 NNE	United States	Record daily snowfall	12.7 cm (5.0 in)	48 of 100 (Notable)
Valley Head	United States	Record daily precipitation	56.4 mm (2.2 in)	46 of 100 (Notable)
Springvale	Australia	Record daily precipitation	45.9 mm (1.8 in)	45 of 100 (Notable)
Enid Dam	United States	Record daily precipitation	87.6 mm (3.4 in)	45 of 100 (Notable)
Hawkins	United States	Record daily precipitation	79.2 mm (3.1 in)	45 of 100 (Notable)
Sandpoint Exp STN	United States	Record daily snowfall	27.9 cm (11.0 in)	44 of 100 (Notable)
Moorhead	United States	Record daily precipitation	78.5 mm (3.1 in)	44 of 100 (Notable)
Norris Madison Pwr House	United States	Record daily snowfall	15.2 cm (6.0 in)	44 of 100 (Notable)
Calion L&D	United States	Record daily precipitation	81.3 mm (3.2 in)	43 of 100 (Notable)
Ft Peck Pwr Plt	United States	Record daily snowfall	8.9 cm (3.5 in)	43 of 100 (Notable)
Batesburg	United States	Record high maximum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Helena	United States	Record daily precipitation	63.5 mm (2.5 in)	42 of 100 (Notable)
Newport	United States	Record daily precipitation	42.2 mm (1.7 in)	42 of 100 (Notable)
Newton	United States	Record high minimum temperature	6.1 C (43.0 F)	42 of 100 (Notable)
Mooringsport 1 N	United States	Record daily precipitation	68.6 mm (2.7 in)	42 of 100 (Notable)
Bynum 4 SSE	United States	Record daily snowfall	15.5 cm (6.1 in)	42 of 100 (Notable)
E Glacier	United States	Record daily precipitation	29.0 mm (1.1 in)	42 of 100 (Notable)
Galata 16 SW	United States	Record daily snowfall	11.4 cm (4.5 in)	42 of 100 (Notable)
Chemult	United States	Record daily precipitation	88.9 mm (3.5 in)	42 of 100 (Notable)
Batesburg	United States	Record high minimum temperature	10.6 C (51.1 F)	42 of 100 (Notable)
Northport	United States	Record daily snowfall	15.2 cm (6.0 in)	42 of 100 (Notable)
Avon Park 2 W	United States	Record high maximum temperature	30.0 C (86.0 F)	41 of 100 (Notable)
Joe Pool Lake	United States	Record daily precipitation	80.5 mm (3.2 in)	41 of 100 (Notable)
Mt Pleasant	United States	Record daily precipitation	37.1 mm (1.5 in)	41 of 100 (Notable)
Kilauea 1134	United States	Record low maximum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Poronajsk	Russia	Record low minimum temperature	-31.7 C (-25.1 F)	40 of 100 (Notable)
Saint Bernard	United States	Record daily precipitation	66.0 mm (2.6 in)	40 of 100 (Notable)
Independence	United States	Record high minimum temperature	8.3 C (46.9 F)	40 of 100 (Notable)
Sedan	United States	Record high minimum temperature	8.3 C (46.9 F)	40 of 100 (Notable)
Creston	United States	Record daily snowfall	20.3 cm (8.0 in)	40 of 100 (Notable)
Kelso	United States	Record daily precipitation	111.0 mm (4.4 in)	39 of 100 (Notable)
Eureka 1E	United States	Record high minimum temperature	6.7 C (44.1 F)	39 of 100 (Notable)
Yates Ctr	United States	Record high minimum temperature	6.7 C (44.1 F)	39 of 100 (Notable)
Belzoni	United States	Record daily precipitation	73.7 mm (2.9 in)	39 of 100 (Notable)
Winfield 2 SW	United States	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Bonners Ferry	United States	Record daily precipitation	27.9 mm (1.1 in)	38 of 100 (Notable)
Gilmore Creek	United States	Record daily precipitation	43.2 mm (1.7 in)	38 of 100 (Notable)
Mersa Matruh	Egypt	Record high minimum temperature	17.7 C (63.9 F)	37 of 100 (Notable)
Carthage	United States	Record daily precipitation	82.8 mm (3.3 in)	37 of 100 (Notable)

Counts by Type and Timescale

688 records

Records set or tied on 20 December 2017 by type: Highest daily maximum 162, Lowest daily maximum 26, Highest daily minimum 176, Lowest daily minimum 16, Heaviest daily rainfall 253, Heaviest daily snowfall 46, Deepest snow cover 9.

Records on 20 December 2017 by type
Record type	Records
Highest daily maximum	162
Lowest daily maximum	26
Highest daily minimum	176
Lowest daily minimum	16
Heaviest daily rainfall	253
Heaviest daily snowfall	46
Deepest snow cover	9

Records on 20 December 2017 by timescale: all-time 3, monthly 23, daily 662.

How Much Records Were Beaten By

586 broken records

Margins by which the 586 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 310.0. Ties are not counted.

Top 20 by Significance

20 December 2017

Top 20 records on 20 December 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 December 2017	Jefferson, US	daily rain	107.7 mm (4.2 in)	69.6 mm (2.7 in)	112 years	75 of 100 (Major)
20 December 2017	Waihee Vly 482, US	monthly rain	232.4 mm (9.1 in)	69.8 mm (2.7 in)	62 years	71 of 100 (Major)
20 December 2017	Water Valley, US	daily rain	80.0 mm (3.1 in)	54.6 mm (2.1 in)	96 years	68 of 100 (Major)
20 December 2017	Plain Dealing, US	daily rain	119.9 mm (4.7 in)	52.6 mm (2.1 in)	91 years	65 of 100 (Major)
20 December 2017	Cleveland, US	daily rain	112.8 mm (4.4 in)	81.8 mm (3.2 in)	50 years	65 of 100 (Major)
20 December 2017	Hungry Horse Dam, US	daily rain	41.4 mm (1.6 in)	24.9 mm (1.0 in)	64 years	65 of 100 (Major)
20 December 2017	Adak AP, US	daily rain	73.9 mm (2.9 in)	41.6 mm (1.6 in)	55 years	62 of 100 (Major)
20 December 2017	Longview, US	daily rain	86.4 mm (3.4 in)	35.6 mm (1.4 in)	94 years	59 of 100 (Notable)
20 December 2017	Kahului AP, US	all-time rain	162.6 mm (6.4 in)	14.8 mm (0.6 in)	61 years	57 of 100 (Notable)
20 December 2017	Brady 27 ENE (the Knees), US	monthly rain	30.7 mm (1.2 in)	16.2 mm (0.6 in)	10 years	56 of 100 (Notable)
20 December 2017	Paris, US	daily rain	58.9 mm (2.3 in)	29.2 mm (1.1 in)	106 years	56 of 100 (Notable)
20 December 2017	Nicholson, AU	daily rain	80.4 mm (3.2 in)	55.4 mm (2.2 in)	15 years	53 of 100 (Notable)
20 December 2017	Fordyce, US	daily rain	109.2 mm (4.3 in)	66.5 mm (2.6 in)	24 years	53 of 100 (Notable)
20 December 2017	Coffeeville, US	daily rain	87.4 mm (3.4 in)	61.2 mm (2.4 in)	40 years	53 of 100 (Notable)
20 December 2017	Rohwer 2 NNE, US	daily rain	123.7 mm (4.9 in)	89.4 mm (3.5 in)	24 years	52 of 100 (Notable)
20 December 2017	Stuttgart 9 ESE, US	daily rain	73.7 mm (2.9 in)	52.1 mm (2.1 in)	44 years	52 of 100 (Notable)
20 December 2017	Greenville Kgvl Radio, US	daily rain	70.4 mm (2.8 in)	19.6 mm (0.8 in)	106 years	52 of 100 (Notable)
20 December 2017	Atlanta, US	daily rain	113.8 mm (4.5 in)	65.0 mm (2.6 in)	24 years	51 of 100 (Notable)
20 December 2017	Dermott 3 NE, US	daily rain	97.8 mm (3.9 in)	71.1 mm (2.8 in)	24 years	50 of 100 (Notable)
20 December 2017	Lalbert, AU	daily rain	25.4 mm (1.0 in)	17.0 mm (0.7 in)	48 years	48 of 100 (Notable)

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 2017

Records set or tied on this calendar date in each year from 1793 to 2017. 2017 had 688 records.

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

Records on 12-20 in each year
Year	Records
1793	1
1795	1
1804	1
1805	2
1808	1
1815	1
1828	1
1837	1
1846	1
1855	8
1858	1
1860	1
1866	1
1867	1
1868	1
1869	1
1871	2
1874	3
1875	1
1877	2
1878	1
1879	1
1880	1
1881	1
1882	1
1884	4
1885	1
1886	4
1889	4
1890	2
1891	2
1892	1
1894	2
1895	8
1896	1
1897	4
1898	2
1899	1
1900	7
1901	8
1902	14
1903	17
1904	9
1905	5
1906	5
1907	11
1908	5
1909	22
1910	17
1911	24
1912	27
1913	7
1914	43
1915	18
1916	45
1917	33
1918	18
1919	25
1920	22
1921	101
1922	88
1923	215
1924	332
1925	96
1926	163
1927	200
1928	93
1929	256
1930	67
1931	536
1932	170
1933	492
1934	265
1935	152
1936	416
1937	181
1938	240
1939	308
1940	965
1941	633
1942	817
1943	193
1944	340
1945	430
1946	327
1947	385
1948	345
1949	1,141
1950	758
1951	926
1952	394
1953	385
1954	416
1955	726
1956	471
1957	1,354
1958	382
1959	142
1960	354
1961	369
1962	475
1963	875
1964	499
1965	353
1966	555
1967	1,370
1968	482
1969	514
1970	518
1971	441
1972	448
1973	1,184
1974	328
1975	610
1976	382
1977	484
1978	910
1979	600
1980	667
1981	1,681
1982	712
1983	2,995
1984	1,411
1985	1,035
1986	321
1987	1,179
1988	760
1989	1,812
1990	1,885
1991	1,172
1992	1,134
1993	1,266
1994	813
1995	1,128
1996	1,448
1997	651
1998	1,110
1999	938
2000	1,150
2001	523
2002	943
2003	1,315
2004	836
2005	515
2006	1,387
2007	986
2008	1,356
2009	1,502
2010	2,055
2011	846
2012	1,131
2013	584
2014	524
2015	1,238
2016	603
2017	688
2018	592
2019	731
2020	554
2021	442
2022	567
2023	1,242
2024	897
2025	1,166

Download the Data

Data for records on 2017-12-20: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 50	547
50 to 100	31
100 to 150	7
150 to 200	0
200 to 250	0
250 to 300	0
300 to 350	1