Weather Records on 21 December 1984

1,012 weather records were set or tied worldwide on 21 December 1984. Highest significance: Mtn Home 1 NNW, US.

Key Facts for 21 December 1984

On 21 December 1984, 1,012 weather records were set or tied at long-record stations worldwide.
340 were record highs and 183 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 27 monthly and 984 daily.
Mtn Home 1 NNW set a daily record precipitation of 102.6 mm (4.0 in) on 21 December 1984.
Across 158 earlier years (1793 to 2025) the same calendar date averaged 486 records.

Record Map

1,012 stations

1,012 station records on 21 December 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 December 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mtn Home 1 NNW	United States	Record daily precipitation	102.6 mm (4.0 in)	64 of 100 (Major)
Beaver Dam	United States	Record daily precipitation	84.8 mm (3.3 in)	61 of 100 (Major)
Olney 2S	United States	Record daily precipitation	59.2 mm (2.3 in)	57 of 100 (Notable)
Lovelaceville	United States	Record daily precipitation	88.4 mm (3.5 in)	57 of 100 (Notable)
Mount House Station	Australia	Record daily precipitation	110.0 mm (4.3 in)	54 of 100 (Notable)
Siloam Springs	United States	Record daily precipitation	166.6 mm (6.6 in)	54 of 100 (Notable)
Wagoner	United States	Record daily precipitation	54.9 mm (2.2 in)	54 of 100 (Notable)
Mammoth Spring	United States	Record daily precipitation	97.3 mm (3.8 in)	53 of 100 (Notable)
Deep Springs College	United States	Record snow depth	15.2 cm (6.0 in)	53 of 100 (Notable)
Wisconsin Rapids	United States	Record daily snowfall	15.2 cm (6.0 in)	53 of 100 (Notable)
Fayetteville Exp STN	United States	Record daily precipitation	69.9 mm (2.8 in)	52 of 100 (Notable)
Spavinaw	United States	Record daily precipitation	52.8 mm (2.1 in)	52 of 100 (Notable)
Ozark Beach 2 NNE	United States	Record daily precipitation	102.9 mm (4.1 in)	51 of 100 (Notable)
Seligman	United States	Record daily precipitation	92.2 mm (3.6 in)	51 of 100 (Notable)
Salina	United States	Record snow depth	15.2 cm (6.0 in)	51 of 100 (Notable)
Bradshaw Homestead	Australia	Record daily precipitation	84.0 mm (3.3 in)	50 of 100 (Notable)
Tecumseh 1W	United States	Record daily precipitation	103.4 mm (4.1 in)	50 of 100 (Notable)
Paoli	United States	Record daily precipitation	50.8 mm (2.0 in)	49 of 100 (Notable)
Dexter	United States	Record daily precipitation	69.9 mm (2.8 in)	48 of 100 (Notable)
Nephi	United States	Record snow depth	27.9 cm (11.0 in)	47 of 100 (Notable)
Omaha Eppley Airfield	United States	Record daily precipitation	29.5 mm (1.2 in)	47 of 100 (Notable)
N Vernon 2 ESE	United States	Record daily precipitation	54.4 mm (2.1 in)	46 of 100 (Notable)
Vevay	United States	Record daily precipitation	53.6 mm (2.1 in)	46 of 100 (Notable)
Mtn Home C of Eng	United States	Record daily precipitation	92.7 mm (3.6 in)	45 of 100 (Notable)
Qulin	United States	Record daily precipitation	81.5 mm (3.2 in)	45 of 100 (Notable)
Bernie	United States	Record daily precipitation	79.2 mm (3.1 in)	44 of 100 (Notable)
Puxico 1 SE	United States	Record daily precipitation	61.2 mm (2.4 in)	44 of 100 (Notable)
Danner	United States	Record daily precipitation	26.4 mm (1.0 in)	44 of 100 (Notable)
Pryor	United States	Record daily precipitation	32.5 mm (1.3 in)	43 of 100 (Notable)
Cairo 3N	United States	Record daily precipitation	81.0 mm (3.2 in)	43 of 100 (Notable)
Berryville 6 NW	United States	Record daily precipitation	127.8 mm (5.0 in)	41 of 100 (Notable)
Seymour 3NW	United States	Record high minimum temperature	8.9 C (48.0 F)	41 of 100 (Notable)
Henderson 8 SSW	United States	Record daily precipitation	66.0 mm (2.6 in)	40 of 100 (Notable)
Rest Lake	United States	Record daily snowfall	29.0 cm (11.4 in)	40 of 100 (Notable)
Eutin	Germany	Record daily precipitation	25.5 mm (1.0 in)	39 of 100 (Notable)
Galena	United States	Record daily precipitation	64.3 mm (2.5 in)	39 of 100 (Notable)
Minchumina	United States	Record daily snowfall	15.2 cm (6.0 in)	39 of 100 (Notable)
Bundaberg Post Office	Australia	Record high maximum temperature	34.9 C (94.8 F)	38 of 100 (Notable)
Corning	United States	Record daily precipitation	70.1 mm (2.8 in)	38 of 100 (Notable)
Fairmont	United States	Record low minimum temperature	-8.9 C (16.0 F)	38 of 100 (Notable)
Castle Rock	United States	Record high minimum temperature	3.9 C (39.0 F)	38 of 100 (Notable)
Ashton 1N	United States	Record daily snowfall	17.8 cm (7.0 in)	38 of 100 (Notable)
Madison Sewage Plt	United States	Record daily precipitation	51.6 mm (2.0 in)	38 of 100 (Notable)
Salem	United States	Record daily precipitation	52.1 mm (2.1 in)	38 of 100 (Notable)
Mtn Grove 2 N	United States	Record daily precipitation	58.4 mm (2.3 in)	38 of 100 (Notable)
Bonneville Dam	United States	Record daily snowfall	18.5 cm (7.3 in)	38 of 100 (Notable)
Eureka Springs 3 WNW	United States	Record daily precipitation	118.9 mm (4.7 in)	37 of 100 (Notable)
Saint Francis	United States	Record daily precipitation	65.5 mm (2.6 in)	37 of 100 (Notable)
Healdton 3 E	United States	Record high minimum temperature	9.4 C (48.9 F)	37 of 100 (Notable)
Okeene	United States	Record high minimum temperature	7.2 C (45.0 F)	37 of 100 (Notable)
Oak City	United States	Record snow depth	20.3 cm (8.0 in)	37 of 100 (Notable)
Gage AP	United States	Record high minimum temperature	4.4 C (39.9 F)	37 of 100 (Notable)
Greenville 2 W	United States	Record daily precipitation	69.9 mm (2.8 in)	36 of 100 (Notable)
Roxboro 7 ESE	United States	Record high maximum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Roxboro 7 ESE	United States	Record high minimum temperature	10.6 C (51.1 F)	36 of 100 (Notable)
Calvin	United States	Record daily precipitation	27.7 mm (1.1 in)	36 of 100 (Notable)
Cradle Valley (Waldheim)	Australia	Record daily precipitation	59.8 mm (2.4 in)	35 of 100 (Notable)
Poplar Bluff	United States	Record daily precipitation	53.8 mm (2.1 in)	35 of 100 (Notable)
Peebles	United States	Record daily precipitation	43.7 mm (1.7 in)	35 of 100 (Notable)
Graham	United States	Record high minimum temperature	10.0 C (50.0 F)	35 of 100 (Notable)

Counts by Type and Timescale

1,012 records

Records set or tied on 21 December 1984 by type: Highest daily maximum 114, Lowest daily maximum 118, Highest daily minimum 226, Lowest daily minimum 65, Heaviest daily rainfall 369, Heaviest daily snowfall 67, Deepest snow cover 53.

Records on 21 December 1984 by type
Record type	Records
Highest daily maximum	114
Lowest daily maximum	118
Highest daily minimum	226
Lowest daily minimum	65
Heaviest daily rainfall	369
Heaviest daily snowfall	67
Deepest snow cover	53

Records on 21 December 1984 by timescale: all-time 1, monthly 27, daily 984.

How Much Records Were Beaten By

831 broken records

Margins by which the 831 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 177.0. Ties are not counted.

Top 20 by Significance

21 December 1984

Top 20 records on 21 December 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 December 1984	Mtn Home 1 NNW, US	daily rain	102.6 mm (4.0 in)	63.2 mm (2.5 in)	64 years	64 of 100 (Major)
21 December 1984	Beaver Dam, US	daily rain	84.8 mm (3.3 in)	46.7 mm (1.8 in)	58 years	61 of 100 (Major)
21 December 1984	Olney 2S, US	daily rain	59.2 mm (2.3 in)	31.3 mm (1.2 in)	66 years	57 of 100 (Notable)
21 December 1984	Lovelaceville, US	daily rain	88.4 mm (3.5 in)	48.0 mm (1.9 in)	58 years	57 of 100 (Notable)
21 December 1984	Mount House Station, AU	daily rain	110.0 mm (4.3 in)	73.9 mm (2.9 in)	27 years	54 of 100 (Notable)
21 December 1984	Siloam Springs, US	monthly rain	166.6 mm (6.6 in)	101.8 mm (4.0 in)	2 years	54 of 100 (Notable)
21 December 1984	Wagoner, US	daily rain	54.9 mm (2.2 in)	25.7 mm (1.0 in)	77 years	54 of 100 (Notable)
21 December 1984	Mammoth Spring, US	daily rain	97.3 mm (3.8 in)	52.8 mm (2.1 in)	64 years	53 of 100 (Notable)
21 December 1984	Deep Springs College, US	daily snow depth	15.2 cm (6.0 in)	15.2 cm (6.0 in)	36 years	53 of 100 (Notable)
21 December 1984	Wisconsin Rapids, US	daily snowfall	15.2 cm (6.0 in)	9.9 cm (3.9 in)	70 years	53 of 100 (Notable)
21 December 1984	Fayetteville Exp STN, US	daily rain	69.9 mm (2.8 in)	51.6 mm (2.0 in)	17 years	52 of 100 (Notable)
21 December 1984	Spavinaw, US	daily rain	52.8 mm (2.1 in)	33.7 mm (1.3 in)	61 years	52 of 100 (Notable)
21 December 1984	Ozark Beach 2 NNE, US	daily rain	102.9 mm (4.1 in)	70.9 mm (2.8 in)	17 years	51 of 100 (Notable)
21 December 1984	Seligman, US	daily rain	92.2 mm (3.6 in)	59.2 mm (2.3 in)	17 years	51 of 100 (Notable)
21 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)
21 December 1984	Bradshaw Homestead, AU	daily rain	84.0 mm (3.3 in)	46.9 mm (1.8 in)	61 years	50 of 100 (Notable)
21 December 1984	Tecumseh 1W, US	daily rain	103.4 mm (4.1 in)	78.8 mm (3.1 in)	22 years	50 of 100 (Notable)
21 December 1984	Paoli, US	daily rain	50.8 mm (2.0 in)	19.6 mm (0.8 in)	79 years	49 of 100 (Notable)
21 December 1984	Dexter, US	daily rain	69.9 mm (2.8 in)	36.4 mm (1.4 in)	58 years	48 of 100 (Notable)
21 December 1984	Nephi, US	daily snow depth	27.9 cm (11.0 in)	17.7 cm (7.0 in)	43 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 1,012 records.

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

Records on 12-21 in each year
Year	Records
1793	1
1794	1
1799	1
1801	2
1808	3
1825	1
1828	1
1839	1
1846	1
1850	1
1855	7
1859	1
1860	1
1868	1
1870	1
1871	2
1874	2
1875	3
1876	1
1877	1
1878	1
1879	1
1880	1
1884	1
1886	3
1889	1
1890	4
1893	4
1894	1
1895	5
1896	3
1897	3
1898	1
1900	8
1901	15
1902	5
1903	25
1904	3
1905	15
1906	15
1907	17
1908	19
1909	20
1910	29
1911	36
1912	23
1913	11
1914	107
1915	43
1916	40
1917	18
1918	41
1919	57
1920	30
1921	104
1922	34
1923	323
1924	377
1925	120
1926	178
1927	147
1928	70
1929	156
1930	66
1931	556
1932	150
1933	581
1934	230
1935	398
1936	323
1937	189
1938	145
1939	140
1940	622
1941	651
1942	968
1943	148
1944	762
1945	396
1946	495
1947	700
1948	297
1949	1,281
1950	504
1951	1,061
1952	197
1953	256
1954	444
1955	888
1956	672
1957	846
1958	516
1959	272
1960	585
1961	254
1962	563
1963	1,137
1964	613
1965	247
1966	400
1967	1,923
1968	818
1969	828
1970	547
1971	680
1972	651
1973	1,292
1974	374
1975	548
1976	446
1977	470
1978	517
1979	558
1980	726
1981	1,476
1982	702
1983	3,324
1984	1,012
1985	979
1986	404
1987	775
1988	717
1989	3,203
1990	2,701
1991	1,125
1992	751
1993	967
1994	793
1995	878
1996	1,114
1997	810
1998	1,142
1999	851
2000	944
2001	650
2002	579
2003	1,103
2004	675
2005	606
2006	1,443
2007	946
2008	1,062
2009	1,097
2010	2,039
2011	653
2012	759
2013	1,029
2014	878
2015	1,173
2016	543
2017	459
2018	742
2019	755
2020	965
2021	323
2022	528
2023	1,170
2024	778
2025	1,099

Download the Data

Data for records on 1984-12-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 25	714
25 to 50	68
50 to 75	25
75 to 100	9
100 to 125	5
125 to 150	5
150 to 175	4
175 to 200	1