Weather Records on 18 December 1986

875 weather records were set or tied worldwide on 18 December 1986. Highest significance: Tuttlingen, DE.

Key Facts for 18 December 1986

On 18 December 1986, 875 weather records were set or tied at long-record stations worldwide.
147 were record highs and 58 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 15 monthly and 859 daily.
Tuttlingen set a daily record precipitation of 35.4 mm (1.4 in) on 18 December 1986.
Across 156 earlier years (1793 to 2025) the same calendar date averaged 477 records.

Record Map

875 stations

875 station records on 18 December 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 December 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tuttlingen	Germany	Record daily precipitation	35.4 mm (1.4 in)	64 of 100 (Major)
Rotan	United States	Record daily precipitation	44.2 mm (1.7 in)	54 of 100 (Notable)
Tulia	United States	Record daily snowfall	14.0 cm (5.5 in)	54 of 100 (Notable)
Crosbyton	United States	Record daily snowfall	7.6 cm (3.0 in)	52 of 100 (Notable)
Tirschenreuth-Lodermuhl	Germany	Record daily precipitation	27.5 mm (1.1 in)	51 of 100 (Notable)
Freudenstadt	Germany	Record daily precipitation	80.0 mm (3.1 in)	50 of 100 (Notable)
Ackerly 4SE	United States	Record daily precipitation	27.2 mm (1.1 in)	50 of 100 (Notable)
Plainview	United States	Record snow depth	10.2 cm (4.0 in)	49 of 100 (Notable)
Stammbach-Querenbach	Germany	Record daily precipitation	34.6 mm (1.4 in)	48 of 100 (Notable)
Waldshut	Germany	Record daily precipitation	60.1 mm (2.4 in)	48 of 100 (Notable)
Brazos	United States	Record daily precipitation	26.9 mm (1.1 in)	48 of 100 (Notable)
Pommelsbrunn	Germany	Record daily precipitation	28.3 mm (1.1 in)	46 of 100 (Notable)
Kreis Biberach Altheim	Germany	Record daily precipitation	26.3 mm (1.0 in)	46 of 100 (Notable)
Eastland	United States	Record daily precipitation	29.5 mm (1.2 in)	46 of 100 (Notable)
Friona	United States	Record daily snowfall	14.0 cm (5.5 in)	46 of 100 (Notable)
Lenorah	United States	Record daily precipitation	29.2 mm (1.1 in)	46 of 100 (Notable)
Olton	United States	Record daily snowfall	11.4 cm (4.5 in)	46 of 100 (Notable)
Plainview	United States	Record daily snowfall	10.2 cm (4.0 in)	46 of 100 (Notable)
Elk	United States	Record daily snowfall	12.7 cm (5.0 in)	45 of 100 (Notable)
Rio Dos Patos	Brazil	Record daily precipitation	60.2 mm (2.4 in)	44 of 100 (Notable)
Ariri	Brazil	Record daily precipitation	111.3 mm (4.4 in)	44 of 100 (Notable)
Heidenheim/Brenz	Germany	Record daily precipitation	30.7 mm (1.2 in)	44 of 100 (Notable)
Nagold	Germany	Record daily precipitation	34.0 mm (1.3 in)	44 of 100 (Notable)
Crailsheim-Alexandersreut	Germany	Record daily precipitation	29.2 mm (1.1 in)	44 of 100 (Notable)
Muleshoe #1	United States	Record daily snowfall	12.7 cm (5.0 in)	44 of 100 (Notable)
Morretes	Brazil	Record daily precipitation	72.0 mm (2.8 in)	43 of 100 (Notable)
Merklingen	Germany	Record daily precipitation	31.2 mm (1.2 in)	43 of 100 (Notable)
Nagoya	Japan	Record daily precipitation	32.5 mm (1.3 in)	43 of 100 (Notable)
Kulani Camp 79	United States	Record low maximum temperature	4.4 C (39.9 F)	43 of 100 (Notable)
Glens Falls AP	United States	Record daily snowfall	37.6 cm (14.8 in)	43 of 100 (Notable)
Kr. Ostalb Gschwend	Germany	Record daily precipitation	38.1 mm (1.5 in)	42 of 100 (Notable)
Hamamatsu	Japan	Record daily precipitation	55.5 mm (2.2 in)	42 of 100 (Notable)
Kobe	Japan	Record daily precipitation	38.0 mm (1.5 in)	42 of 100 (Notable)
Gjerstad I Aust-Agder	Norway	Record daily precipitation	42.8 mm (1.7 in)	42 of 100 (Notable)
Jayton	United States	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Ellwangen-Rindelbach	Germany	Record daily precipitation	27.3 mm (1.1 in)	41 of 100 (Notable)
Kaisersbach-Cronhutte	Germany	Record daily precipitation	30.6 mm (1.2 in)	41 of 100 (Notable)
Mauth-Finsterau	Germany	Record daily precipitation	56.2 mm (2.2 in)	41 of 100 (Notable)
Laguna	United States	Record daily snowfall	10.2 cm (4.0 in)	41 of 100 (Notable)
Midland 4 ENE	United States	Record daily precipitation	27.9 mm (1.1 in)	41 of 100 (Notable)
Windhoek	Namibia	Record daily precipitation	27.0 mm (1.1 in)	41 of 100 (Notable)
Donaueschingen	Germany	Record daily precipitation	26.3 mm (1.0 in)	40 of 100 (Notable)
Teuschnitz	Germany	Record daily precipitation	33.4 mm (1.3 in)	40 of 100 (Notable)
Grandfalls 3SSE	United States	Record daily precipitation	28.4 mm (1.1 in)	40 of 100 (Notable)
Morton	United States	Record daily snowfall	10.2 cm (4.0 in)	40 of 100 (Notable)
Titisee-Neustadt-Langenordnach	Germany	Record daily precipitation	43.8 mm (1.7 in)	39 of 100 (Notable)
Kr. Neckar-Odenwald Buchen	Germany	Record daily precipitation	33.5 mm (1.3 in)	38 of 100 (Notable)
Ft Sumner	United States	Record daily snowfall	11.4 cm (4.5 in)	38 of 100 (Notable)
Canyon	United States	Record daily snowfall	10.2 cm (4.0 in)	38 of 100 (Notable)
Hereford	United States	Record daily snowfall	8.9 cm (3.5 in)	38 of 100 (Notable)
Silverton	United States	Record daily snowfall	10.2 cm (4.0 in)	38 of 100 (Notable)
Kempten	Germany	Record daily precipitation	37.5 mm (1.5 in)	37 of 100 (Notable)
Tahoka	United States	Record daily snowfall	5.1 cm (2.0 in)	37 of 100 (Notable)
Corupa (Hansa)	Brazil	Record daily precipitation	76.5 mm (3.0 in)	36 of 100 (Notable)
Oderen	France	Record daily precipitation	76.0 mm (3.0 in)	36 of 100 (Notable)
Geroda-Platz	Germany	Record daily precipitation	25.2 mm (1.0 in)	36 of 100 (Notable)
Oberviechtach	Germany	Record daily precipitation	27.1 mm (1.1 in)	36 of 100 (Notable)
Water Valley	United States	Record daily precipitation	26.2 mm (1.0 in)	36 of 100 (Notable)
Schwabisch Hall-Bibersfeld	Germany	Record daily precipitation	27.4 mm (1.1 in)	35 of 100 (Notable)
Hartford-Bradley Intl AP	United States	Record daily precipitation	49.5 mm (1.9 in)	35 of 100 (Notable)

Counts by Type and Timescale

875 records

Records set or tied on 18 December 1986 by type: Highest daily maximum 66, Lowest daily maximum 32, Highest daily minimum 81, Lowest daily minimum 26, Heaviest daily rainfall 584, Heaviest daily snowfall 62, Deepest snow cover 24.

Records on 18 December 1986 by type
Record type	Records
Highest daily maximum	66
Lowest daily maximum	32
Highest daily minimum	81
Lowest daily minimum	26
Heaviest daily rainfall	584
Heaviest daily snowfall	62
Deepest snow cover	24

Records on 18 December 1986 by timescale: all-time 1, monthly 15, daily 859.

How Much Records Were Beaten By

781 broken records

Margins by which the 781 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 191.0. Ties are not counted.

Top 20 by Significance

18 December 1986

Top 20 records on 18 December 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 1986	Tuttlingen, DE	daily rain	35.4 mm (1.4 in)	20.5 mm (0.8 in)	51 years	64 of 100 (Major)
18 December 1986	Rotan, US	daily rain	44.2 mm (1.7 in)	38.4 mm (1.5 in)	29 years	54 of 100 (Notable)
18 December 1986	Tulia, US	daily snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	37 years	54 of 100 (Notable)
18 December 1986	Crosbyton, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	90 years	52 of 100 (Notable)
18 December 1986	Tirschenreuth-Lodermuhl, DE	daily rain	27.5 mm (1.1 in)	20.0 mm (0.8 in)	24 years	51 of 100 (Notable)
18 December 1986	Freudenstadt, DE	daily rain	80.0 mm (3.1 in)	53.6 mm (2.1 in)	24 years	50 of 100 (Notable)
18 December 1986	Ackerly 4SE, US	daily rain	27.2 mm (1.1 in)	24.7 mm (1.0 in)	29 years	50 of 100 (Notable)
18 December 1986	Plainview, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	77 years	49 of 100 (Notable)
18 December 1986	Stammbach-Querenbach, DE	daily rain	34.6 mm (1.4 in)	22.9 mm (0.9 in)	36 years	48 of 100 (Notable)
18 December 1986	Waldshut, DE	daily rain	60.1 mm (2.4 in)	37.1 mm (1.5 in)	16 years	48 of 100 (Notable)
18 December 1986	Brazos, US	daily rain	26.9 mm (1.1 in)	21.6 mm (0.9 in)	76 years	48 of 100 (Notable)
18 December 1986	Pommelsbrunn, DE	daily rain	28.3 mm (1.1 in)	7.4 mm (0.29 in)	84 years	46 of 100 (Notable)
18 December 1986	Kreis Biberach Altheim, DE	daily rain	26.3 mm (1.0 in)	14.9 mm (0.6 in)	16 years	46 of 100 (Notable)
18 December 1986	Eastland, US	daily rain	29.5 mm (1.2 in)	25.7 mm (1.0 in)	37 years	46 of 100 (Notable)
18 December 1986	Friona, US	daily snowfall	14.0 cm (5.5 in)	11.5 cm (4.5 in)	56 years	46 of 100 (Notable)
18 December 1986	Lenorah, US	daily rain	29.2 mm (1.1 in)	26.2 mm (1.0 in)	21 years	46 of 100 (Notable)
18 December 1986	Olton, US	daily snowfall	11.4 cm (4.5 in)	11.4 cm (4.5 in)	57 years	46 of 100 (Notable)
18 December 1986	Plainview, US	daily snowfall	10.2 cm (4.0 in)	7.7 cm (3.0 in)	76 years	46 of 100 (Notable)
18 December 1986	Elk, US	daily snowfall	12.7 cm (5.0 in)	7.6 cm (3.0 in)	87 years	45 of 100 (Notable)
18 December 1986	Rio Dos Patos, BR	daily rain	60.2 mm (2.4 in)	40.8 mm (1.6 in)	32 years	44 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 1986

Records set or tied on this calendar date in each year from 1793 to 1986. 1986 had 875 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 1986-12-18: 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 25	686
25 to 50	42
50 to 75	26
75 to 100	15
100 to 125	7
125 to 150	3
150 to 175	1
175 to 200	1