Weather Records on 20 December 1984

1,411 weather records were set or tied worldwide on 20 December 1984. Highest significance: Groningen-1, NL.

Key Facts for 20 December 1984

On 20 December 1984, 1,411 weather records were set or tied at long-record stations worldwide.
381 were record highs and 301 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 23 monthly and 1,387 daily.
Groningen-1 set a daily record precipitation of 28.3 mm (1.1 in) on 20 December 1984.
Across 163 earlier years (1793 to 2025) the same calendar date averaged 461 records.

Record Map

1,411 stations

1,411 station records on 20 December 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 December 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Groningen-1	Netherlands	Record daily precipitation	28.3 mm (1.1 in)	63 of 100 (Major)
Bederkesa	Germany	Record daily precipitation	27.7 mm (1.1 in)	62 of 100 (Major)
Castle Dale	United States	Record daily snowfall	19.1 cm (7.5 in)	58 of 100 (Notable)
Dyer 5S	United States	Record daily snowfall	10.2 cm (4.0 in)	54 of 100 (Notable)
Jever	Germany	Record daily precipitation	30.1 mm (1.2 in)	53 of 100 (Notable)
Wilhelmshaven	Germany	Record daily precipitation	33.9 mm (1.3 in)	53 of 100 (Notable)
Tehachapi	United States	Record daily snowfall	35.6 cm (14.0 in)	53 of 100 (Notable)
Plaisance (Mauritiu	Mauritius	Record daily precipitation	150.2 mm (5.9 in)	52 of 100 (Notable)
Finsterwolde	Netherlands	Record daily precipitation	25.4 mm (1.0 in)	52 of 100 (Notable)
Mangochi	Malawi	Record daily precipitation	87.7 mm (3.5 in)	51 of 100 (Notable)
Koosharem	United States	Record daily snowfall	20.3 cm (8.0 in)	51 of 100 (Notable)
Salina	United States	Record snow depth	15.2 cm (6.0 in)	51 of 100 (Notable)
Aurich	Germany	Record daily precipitation	26.0 mm (1.0 in)	50 of 100 (Notable)
Jensen	United States	Record daily snowfall	31.8 cm (12.5 in)	49 of 100 (Notable)
Breona	Australia	Record daily precipitation	58.4 mm (2.3 in)	48 of 100 (Notable)
Muskogee	United States	Record daily precipitation	45.2 mm (1.8 in)	48 of 100 (Notable)
Vernal	United States	Record daily snowfall	25.4 cm (10.0 in)	48 of 100 (Notable)
Veenhuizen (D)	Netherlands	Record daily precipitation	27.1 mm (1.1 in)	47 of 100 (Notable)
Winschoten	Netherlands	Record daily precipitation	25.0 mm (1.0 in)	47 of 100 (Notable)
Pattiway	United States	Record snow depth	20.3 cm (8.0 in)	47 of 100 (Notable)
Makkum	Netherlands	Record daily precipitation	26.5 mm (1.0 in)	44 of 100 (Notable)
Oldeholtpade	Netherlands	Record daily precipitation	27.4 mm (1.1 in)	44 of 100 (Notable)
Deep Springs College	United States	Record daily precipitation	34.8 mm (1.4 in)	44 of 100 (Notable)
Napier Downs	Australia	Record daily precipitation	83.0 mm (3.3 in)	43 of 100 (Notable)
Roden	Netherlands	Record daily precipitation	32.8 mm (1.3 in)	43 of 100 (Notable)
Hatch	United States	Record daily snowfall	17.8 cm (7.0 in)	43 of 100 (Notable)
Deseret	United States	Record daily snowfall	16.5 cm (6.5 in)	42 of 100 (Notable)
Derby Post Office	Australia	Record daily precipitation	31.6 mm (1.2 in)	40 of 100 (Notable)
Clausthal-Zellerfeld	Germany	Record daily precipitation	31.5 mm (1.2 in)	40 of 100 (Notable)
Bizana (Bos)	South Africa	Record daily precipitation	45.5 mm (1.8 in)	40 of 100 (Notable)
San Sebastian - Igueldo	Spain	Record daily precipitation	74.7 mm (2.9 in)	40 of 100 (Notable)
Roxboro 7 ESE	United States	Record high minimum temperature	13.3 C (55.9 F)	40 of 100 (Notable)
Eelde-1	Netherlands	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)
Minersville	United States	Record daily snowfall	16.5 cm (6.5 in)	39 of 100 (Notable)
Warrinilla	Australia	Record daily precipitation	63.0 mm (2.5 in)	38 of 100 (Notable)
Utuado	Puerto Rico [United States]	Record low maximum temperature	23.9 C (75.0 F)	38 of 100 (Notable)
Doyle	United States	Record snow depth	12.7 cm (5.0 in)	38 of 100 (Notable)
Roxboro 7 ESE	United States	Record high maximum temperature	22.2 C (72.0 F)	38 of 100 (Notable)
Bayard	United States	Record daily precipitation	32.5 mm (1.3 in)	38 of 100 (Notable)
Wyndham Port	Australia	Record daily precipitation	86.2 mm (3.4 in)	37 of 100 (Notable)
Villa Ahumada	Mexico	Record high minimum temperature	7.8 C (46.0 F)	37 of 100 (Notable)
Bilbao Aeropuerto	Spain	Record daily precipitation	66.2 mm (2.6 in)	37 of 100 (Notable)
Boras	Sweden	Record daily precipitation	26.1 mm (1.0 in)	37 of 100 (Notable)
Songkhla	Thailand	Record daily precipitation	146.8 mm (5.8 in)	37 of 100 (Notable)
Rifle	United States	Record daily snowfall	25.4 cm (10.0 in)	37 of 100 (Notable)
Ft Bayard 4W	United States	Record high minimum temperature	3.9 C (39.0 F)	37 of 100 (Notable)
Richfield Radio Ksvc	United States	Record daily snowfall	21.3 cm (8.4 in)	37 of 100 (Notable)
Gorredijk	Netherlands	Record daily precipitation	26.0 mm (1.0 in)	36 of 100 (Notable)
Niekerk	Netherlands	Record daily precipitation	25.1 mm (1.0 in)	36 of 100 (Notable)
Danville	United States	Record daily precipitation	45.7 mm (1.8 in)	36 of 100 (Notable)
Deep Springs College	United States	Record snow depth	20.3 cm (8.0 in)	36 of 100 (Notable)
Hillsboro	United States	Record high minimum temperature	5.0 C (41.0 F)	36 of 100 (Notable)
Santuck	United States	Record high minimum temperature	15.6 C (60.1 F)	36 of 100 (Notable)
Packwood	United States	Record daily snowfall	16.5 cm (6.5 in)	36 of 100 (Notable)
Marum	Netherlands	Record daily precipitation	27.5 mm (1.1 in)	35 of 100 (Notable)
Ohotsk	Russia	Record low minimum temperature	-33.5 C (-28.3 F)	35 of 100 (Notable)
Independence	United States	Record daily snowfall	7.6 cm (3.0 in)	35 of 100 (Notable)
Palomar Mtn Obsy	United States	Record daily precipitation	76.2 mm (3.0 in)	35 of 100 (Notable)
Pattiway	United States	Record daily precipitation	34.5 mm (1.4 in)	35 of 100 (Notable)
Portales	United States	Record high minimum temperature	6.7 C (44.1 F)	35 of 100 (Notable)

Counts by Type and Timescale

1,411 records

Records set or tied on 20 December 1984 by type: Highest daily maximum 134, Lowest daily maximum 173, Highest daily minimum 247, Lowest daily minimum 128, Heaviest daily rainfall 604, Heaviest daily snowfall 66, Deepest snow cover 59.

Records on 20 December 1984 by type
Record type	Records
Highest daily maximum	134
Lowest daily maximum	173
Highest daily minimum	247
Lowest daily minimum	128
Heaviest daily rainfall	604
Heaviest daily snowfall	66
Deepest snow cover	59

Records on 20 December 1984 by timescale: all-time 1, monthly 23, daily 1,387.

How Much Records Were Beaten By

1,208 broken records

Margins by which the 1,208 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 254.0. Ties are not counted.

Top 20 by Significance

20 December 1984

Top 20 records on 20 December 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 December 1984	Groningen-1, NL	daily rain	28.3 mm (1.1 in)	14.3 mm (0.6 in)	58 years	63 of 100 (Major)
20 December 1984	Bederkesa, DE	daily rain	27.7 mm (1.1 in)	16.0 mm (0.6 in)	59 years	62 of 100 (Major)
20 December 1984	Castle Dale, US	daily snowfall	19.1 cm (7.5 in)	14.0 cm (5.5 in)	64 years	58 of 100 (Notable)
20 December 1984	Dyer 5S, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	81 years	54 of 100 (Notable)
20 December 1984	Jever, DE	daily rain	30.1 mm (1.2 in)	21.2 mm (0.8 in)	32 years	53 of 100 (Notable)
20 December 1984	Wilhelmshaven, DE	daily rain	33.9 mm (1.3 in)	25.2 mm (1.0 in)	32 years	53 of 100 (Notable)
20 December 1984	Tehachapi, US	monthly snowfall	35.6 cm (14.0 in)	5.1 cm (2.0 in)	90 years	53 of 100 (Notable)
20 December 1984	Plaisance (Mauritiu, MU	daily rain	150.2 mm (5.9 in)	103.7 mm (4.1 in)	31 years	52 of 100 (Notable)
20 December 1984	Finsterwolde, NL	daily rain	25.4 mm (1.0 in)	17.3 mm (0.7 in)	30 years	52 of 100 (Notable)
20 December 1984	Mangochi, MW	daily rain	87.7 mm (3.5 in)	44.5 mm (1.8 in)	35 years	51 of 100 (Notable)
20 December 1984	Koosharem, US	daily snowfall	20.3 cm (8.0 in)	15.2 cm (6.0 in)	64 years	51 of 100 (Notable)
20 December 1984	Salina, US	daily snow depth	15.2 cm (6.0 in)	15.2 cm (6.0 in)	61 years	51 of 100 (Notable)
20 December 1984	Aurich, DE	daily rain	26.0 mm (1.0 in)	16.3 mm (0.6 in)	32 years	50 of 100 (Notable)
20 December 1984	Jensen, US	daily snowfall	31.8 cm (12.5 in)	21.6 cm (8.5 in)	16 years	49 of 100 (Notable)
20 December 1984	Breona, AU	daily rain	58.4 mm (2.3 in)	40.6 mm (1.6 in)	34 years	48 of 100 (Notable)
20 December 1984	Muskogee, US	daily rain	45.2 mm (1.8 in)	21.1 mm (0.8 in)	79 years	48 of 100 (Notable)
20 December 1984	Vernal, US	daily snowfall	25.4 cm (10.0 in)	15.2 cm (6.0 in)	41 years	48 of 100 (Notable)
20 December 1984	Veenhuizen (D), NL	daily rain	27.1 mm (1.1 in)	20.5 mm (0.8 in)	16 years	47 of 100 (Notable)
20 December 1984	Winschoten, NL	daily rain	25.0 mm (1.0 in)	16.5 mm (0.6 in)	30 years	47 of 100 (Notable)
20 December 1984	Pattiway, US	daily snow depth	20.3 cm (8.0 in)	12.7 cm (5.0 in)	66 years	47 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 1984

Records set or tied on this calendar date in each year from 1793 to 1984. 1984 had 1,411 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 1984-12-20: 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	1,159
50 to 100	32
100 to 150	12
150 to 200	3
200 to 250	1
250 to 300	1