Weather Records on 18 December 2017

516 weather records were set or tied worldwide on 18 December 2017. Highest significance: Poltava, UA.

Key Facts for 18 December 2017

On 18 December 2017, 516 weather records were set or tied at long-record stations worldwide.
232 were record highs and 58 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 505 daily.
Poltava set a monthly record daily precipitation of 38.1 mm (1.5 in) on 18 December 2017.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 479 records.

Record Map

516 stations

516 station records on 18 December 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 December 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Poltava	Ukraine	Record daily precipitation	38.1 mm (1.5 in)	75 of 100 (Major)
Rosa Brook	Australia	Record daily precipitation	37.0 mm (1.5 in)	74 of 100 (Major)
Libby 32 SSE	United States	Record daily precipitation	47.0 mm (1.9 in)	69 of 100 (Major)
Forest Grove	Australia	Record daily precipitation	30.4 mm (1.2 in)	66 of 100 (Major)
Serpentine	Australia	Record daily precipitation	28.6 mm (1.1 in)	61 of 100 (Major)
Dwellingup	Australia	Record daily precipitation	35.6 mm (1.4 in)	59 of 100 (Notable)
Kursk	Russia	Record daily precipitation	34.9 mm (1.4 in)	58 of 100 (Notable)
Northcliffe	Australia	Record daily precipitation	38.4 mm (1.5 in)	56 of 100 (Notable)
Jarrahdale	Australia	Record daily precipitation	35.6 mm (1.4 in)	53 of 100 (Notable)
Pemberton	Australia	Record daily precipitation	41.1 mm (1.6 in)	50 of 100 (Notable)
Jokkmokk	Sweden	Record snow depth	88.0 cm (34.6 in)	48 of 100 (Notable)
Sequim 2 E	United States	Record daily precipitation	29.0 mm (1.1 in)	48 of 100 (Notable)
Alexandra Bridge	Australia	Record daily precipitation	31.8 mm (1.3 in)	47 of 100 (Notable)
Walters Farm	Australia	Record daily precipitation	37.6 mm (1.5 in)	47 of 100 (Notable)
Mount Helena	Australia	Record daily precipitation	29.0 mm (1.1 in)	46 of 100 (Notable)
Morgan City	United States	Record daily precipitation	70.9 mm (2.8 in)	44 of 100 (Notable)
Kotzebue AP	United States	Record daily snowfall	21.1 cm (8.3 in)	43 of 100 (Notable)
Lake Leschenaultia	Australia	Record daily precipitation	29.0 mm (1.1 in)	42 of 100 (Notable)
Pike Creek	United States	Record daily precipitation	40.6 mm (1.6 in)	42 of 100 (Notable)
Carrollton	United States	Record high minimum temperature	5.0 C (41.0 F)	41 of 100 (Notable)
Wereroa	Australia	Record daily precipitation	27.0 mm (1.1 in)	39 of 100 (Notable)
Chester	United States	Record daily snowfall	10.4 cm (4.1 in)	38 of 100 (Notable)
Mahackala	Russia	Record high minimum temperature	8.8 C (47.8 F)	37 of 100 (Notable)
Thornton 1SSE	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Sedro-Woolley	United States	Record daily precipitation	45.0 mm (1.8 in)	37 of 100 (Notable)
Waldron	United States	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Illalangi	Australia	Record daily precipitation	25.0 mm (1.0 in)	36 of 100 (Notable)
Woomera Aerodrome	Australia	Record high maximum temperature	45.5 C (113.9 F)	36 of 100 (Notable)
Gildford	United States	Record daily snowfall	5.1 cm (2.0 in)	35 of 100 (Notable)
Milton Freewater	United States	Record high minimum temperature	7.8 C (46.0 F)	35 of 100 (Notable)
Williston Sloulin Fld	United States	Record high minimum temperature	-1.0 C (30.2 F)	35 of 100 (Notable)
Berezovo	Russia	Record high minimum temperature	-4.1 C (24.6 F)	34 of 100 (Routine)
Derbent	Russia	Record high minimum temperature	8.3 C (46.9 F)	34 of 100 (Routine)
Torrevieja	Spain	Record low minimum temperature	0.7 C (33.3 F)	34 of 100 (Routine)
Manistee 3SE	United States	Record high maximum temperature	13.3 C (55.9 F)	34 of 100 (Routine)
Ferguson Valley	Australia	Record daily precipitation	27.0 mm (1.1 in)	33 of 100 (Routine)
Budennovsk	Russia	Record high minimum temperature	5.6 C (42.1 F)	33 of 100 (Routine)
Hoopeston	United States	Record high minimum temperature	3.9 C (39.0 F)	33 of 100 (Routine)
La Harpe	United States	Record high minimum temperature	3.9 C (39.0 F)	33 of 100 (Routine)
Slidell	United States	Record daily precipitation	77.0 mm (3.0 in)	33 of 100 (Routine)
Burlington Muni AP	United States	Record high minimum temperature	4.4 C (39.9 F)	33 of 100 (Routine)
Stampede Pass	United States	Record daily precipitation	54.6 mm (2.1 in)	33 of 100 (Routine)
Oodnadatta Airport	Australia	Record high maximum temperature	47.1 C (116.8 F)	32 of 100 (Routine)
Kyancutta	Australia	Record high minimum temperature	24.0 C (75.2 F)	32 of 100 (Routine)
Tazovskoe	Russia	Record high minimum temperature	-6.2 C (20.8 F)	32 of 100 (Routine)
Ponyri	Russia	Record daily precipitation	27.7 mm (1.1 in)	32 of 100 (Routine)
Lubny	Ukraine	Record daily precipitation	28.2 mm (1.1 in)	31 of 100 (Routine)
Abita Springs Fire Twr	United States	Record daily precipitation	76.2 mm (3.0 in)	31 of 100 (Routine)
Kraft Creek	United States	Record daily precipitation	33.0 mm (1.3 in)	31 of 100 (Routine)
Sandusky	United States	Record high minimum temperature	3.3 C (37.9 F)	31 of 100 (Routine)
Monroe City	United States	Record high minimum temperature	5.6 C (42.1 F)	30 of 100 (Routine)
Saverton L&D 22	United States	Record high minimum temperature	6.1 C (43.0 F)	30 of 100 (Routine)
Vandalia	United States	Record high minimum temperature	4.4 C (39.9 F)	30 of 100 (Routine)
One Tree Bridge (Hazelmere)	Australia	Record daily precipitation	31.4 mm (1.2 in)	29 of 100 (Routine)
Marianna Muni AP	United States	Record high minimum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Marshall	United States	Record high minimum temperature	5.6 C (42.1 F)	29 of 100 (Routine)
Karragullen North	Australia	Record daily precipitation	29.2 mm (1.1 in)	28 of 100 (Routine)
Har Kenaan	Israel	Record high maximum temperature	20.2 C (68.4 F)	28 of 100 (Routine)
Krasnaja Poljana	Russia	Record high minimum temperature	7.1 C (44.8 F)	28 of 100 (Routine)
Kirksville Rgnl AP	United States	Record high minimum temperature	4.4 C (39.9 F)	28 of 100 (Routine)

Counts by Type and Timescale

516 records

Records set or tied on 18 December 2017 by type: Highest daily maximum 64, Lowest daily maximum 21, Highest daily minimum 168, Lowest daily minimum 37, Heaviest daily rainfall 206, Heaviest daily snowfall 10, Deepest snow cover 10.

Records on 18 December 2017 by type
Record type	Records
Highest daily maximum	64
Lowest daily maximum	21
Highest daily minimum	168
Lowest daily minimum	37
Heaviest daily rainfall	206
Heaviest daily snowfall	10
Deepest snow cover	10

Records on 18 December 2017 by timescale: all-time 0, monthly 11, daily 505.

How Much Records Were Beaten By

452 broken records

Margins by which the 452 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 140.0. Ties are not counted.

Top 20 by Significance

18 December 2017

Top 20 records on 18 December 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 2017	Poltava, UA	monthly rain	38.1 mm (1.5 in)	11.2 mm (0.4 in)	81 years	75 of 100 (Major)
18 December 2017	Rosa Brook, AU	daily rain	37.0 mm (1.5 in)	22.3 mm (0.9 in)	86 years	74 of 100 (Major)
18 December 2017	Libby 32 SSE, US	daily rain	47.0 mm (1.9 in)	29.7 mm (1.2 in)	66 years	69 of 100 (Major)
18 December 2017	Forest Grove, AU	daily rain	30.4 mm (1.2 in)	19.0 mm (0.7 in)	86 years	66 of 100 (Major)
18 December 2017	Serpentine, AU	daily rain	28.6 mm (1.1 in)	18.4 mm (0.7 in)	80 years	61 of 100 (Major)
18 December 2017	Dwellingup, AU	daily rain	35.6 mm (1.4 in)	19.9 mm (0.8 in)	80 years	59 of 100 (Notable)
18 December 2017	Kursk, RU	monthly rain	34.9 mm (1.4 in)	3.4 mm (0.13 in)	99 years	58 of 100 (Notable)
18 December 2017	Northcliffe, AU	daily rain	38.4 mm (1.5 in)	24.0 mm (0.9 in)	32 years	56 of 100 (Notable)
18 December 2017	Jarrahdale, AU	daily rain	35.6 mm (1.4 in)	14.0 mm (0.6 in)	80 years	53 of 100 (Notable)
18 December 2017	Pemberton, AU	daily rain	41.1 mm (1.6 in)	23.9 mm (0.9 in)	14 years	50 of 100 (Notable)
18 December 2017	Jokkmokk, SE	daily snow depth	88.0 cm (34.6 in)	14.0 cm (5.5 in)	104 years	48 of 100 (Notable)
18 December 2017	Sequim 2 E, US	daily rain	29.0 mm (1.1 in)	18.6 mm (0.7 in)	27 years	48 of 100 (Notable)
18 December 2017	Alexandra Bridge, AU	daily rain	31.8 mm (1.3 in)	27.8 mm (1.1 in)	10 years	47 of 100 (Notable)
18 December 2017	Walters Farm, AU	daily rain	37.6 mm (1.5 in)	32.4 mm (1.3 in)	10 years	47 of 100 (Notable)
18 December 2017	Mount Helena, AU	daily rain	29.0 mm (1.1 in)	23.8 mm (0.9 in)	10 years	46 of 100 (Notable)
18 December 2017	Morgan City, US	daily rain	70.9 mm (2.8 in)	18.8 mm (0.7 in)	86 years	44 of 100 (Notable)
18 December 2017	Kotzebue AP, US	daily snowfall	21.1 cm (8.3 in)	8.1 cm (3.2 in)	19 years	43 of 100 (Notable)
18 December 2017	Lake Leschenaultia, AU	daily rain	29.0 mm (1.1 in)	22.2 mm (0.9 in)	10 years	42 of 100 (Notable)
18 December 2017	Pike Creek, US	daily rain	40.6 mm (1.6 in)	22.8 mm (0.9 in)	18 years	42 of 100 (Notable)
18 December 2017	Carrollton, US	daily high min	5.0 C (41.0 F)	1.1 C (2.0 F)	116 years	41 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 516 records.

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

Records on 12-18 in each year
Year	Records
1793	1
1796	1
1805	1
1814	1
1825	1
1846	1
1849	1
1852	2
1858	1
1859	4
1862	2
1864	1
1868	1
1873	1
1875	1
1876	2
1878	1
1881	2
1882	1
1884	2
1886	1
1887	1
1888	1
1889	4
1890	5
1892	4
1894	8
1895	1
1897	4
1898	9
1899	3
1900	2
1901	6
1902	33
1903	11
1904	25
1905	3
1906	21
1907	15
1908	16
1909	18
1910	19
1911	9
1912	33
1913	38
1914	20
1915	28
1916	57
1917	62
1918	21
1919	117
1920	77
1921	123
1922	108
1923	378
1924	480
1925	74
1926	173
1927	151
1928	165
1929	366
1930	230
1931	360
1932	353
1933	506
1934	209
1935	138
1936	466
1937	459
1938	185
1939	900
1940	242
1941	213
1942	281
1943	419
1944	191
1945	598
1946	199
1947	266
1948	354
1949	561
1950	289
1951	867
1952	450
1953	373
1954	507
1955	611
1956	333
1957	901
1958	524
1959	477
1960	477
1961	885
1962	759
1963	571
1964	840
1965	402
1966	644
1967	1,105
1968	488
1969	376
1970	502
1971	387
1972	375
1973	1,008
1974	229
1975	625
1976	459
1977	992
1978	946
1979	1,087
1980	772
1981	1,362
1982	537
1983	2,014
1984	1,439
1985	1,384
1986	875
1987	1,505
1988	1,061
1989	1,818
1990	1,367
1991	756
1992	1,045
1993	697
1994	643
1995	1,065
1996	1,833
1997	1,195
1998	863
1999	923
2000	1,572
2001	906
2002	1,437
2003	987
2004	506
2005	987
2006	1,167
2007	746
2008	1,014
2009	1,253
2010	1,322
2011	697
2012	729
2013	513
2014	556
2015	1,254
2016	1,821
2017	516
2018	464
2019	679
2020	326
2021	762
2022	536
2023	1,293
2024	780
2025	994

Download the Data

Data for records on 2017-12-18: 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 20	424
20 to 40	22
40 to 60	2
60 to 80	0
80 to 100	2
100 to 120	1
120 to 140	1