Weather Records on 21 December 1999

851 weather records were set or tied worldwide on 21 December 1999. Highest significance: Kenai AP, US.

Key Facts for 21 December 1999

On 21 December 1999, 851 weather records were set or tied at long-record stations worldwide.
265 were record highs and 325 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 33 monthly and 816 daily.
Kenai AP set a daily record precipitation of 47.2 mm (1.9 in) on 21 December 1999.
Across 158 earlier years (1793 to 2025) the same calendar date averaged 487 records.

Record Map

851 stations

851 station records on 21 December 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 December 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kenai AP	United States	Record daily precipitation	47.2 mm (1.9 in)	63 of 100 (Major)
Galway	Ireland	Record daily precipitation	35.9 mm (1.4 in)	56 of 100 (Notable)
Sabancuy	Mexico	Record daily precipitation	94.0 mm (3.7 in)	55 of 100 (Notable)
Sakai	Japan	Record daily precipitation	59.9 mm (2.4 in)	54 of 100 (Notable)
Ixtapa (Cfe)	Mexico	Record daily precipitation	30.0 mm (1.2 in)	54 of 100 (Notable)
Puntilla	United States	Record daily snowfall	22.9 cm (9.0 in)	54 of 100 (Notable)
Valdez WSO	United States	Record daily precipitation	76.7 mm (3.0 in)	54 of 100 (Notable)
Skwentna	United States	Record daily precipitation	94.2 mm (3.7 in)	52 of 100 (Notable)
Skwentna	United States	Record daily snowfall	43.2 cm (17.0 in)	52 of 100 (Notable)
Cooper Lake Project	United States	Record daily precipitation	90.4 mm (3.6 in)	48 of 100 (Notable)
Myklebust I Breim	Norway	Record snow depth	90.0 cm (35.4 in)	47 of 100 (Notable)
Sandane	Norway	Record snow depth	90.0 cm (35.4 in)	47 of 100 (Notable)
Willows 6 W	United States	Record high maximum temperature	23.9 C (75.0 F)	47 of 100 (Notable)
Puente Colgante	Mexico	Record daily precipitation	28.7 mm (1.1 in)	46 of 100 (Notable)
Tonsina	United States	Record daily precipitation	26.4 mm (1.0 in)	44 of 100 (Notable)
Jonuta	Mexico	Record daily precipitation	94.0 mm (3.7 in)	43 of 100 (Notable)
Vik I Sogn III	Norway	Record snow depth	54.0 cm (21.3 in)	43 of 100 (Notable)
Vacaville	United States	Record high maximum temperature	23.9 C (75.0 F)	43 of 100 (Notable)
Davis 2 WSW Exp Farm	United States	Record high maximum temperature	22.8 C (73.0 F)	42 of 100 (Notable)
Talkeetna AP	United States	Record daily precipitation	64.5 mm (2.5 in)	42 of 100 (Notable)
Sarajevo	Bosnia and Herzegovina	Record daily precipitation	42.6 mm (1.7 in)	41 of 100 (Notable)
Quito	Mexico	Record low minimum temperature	-2.2 C (28.0 F)	41 of 100 (Notable)
Kislovodsk	Russia	Record high maximum temperature	23.7 C (74.7 F)	41 of 100 (Notable)
Poltava	Ukraine	Record daily precipitation	25.7 mm (1.0 in)	41 of 100 (Notable)
Meeker	United States	Record daily snowfall	15.2 cm (6.0 in)	41 of 100 (Notable)
Buras	United States	Record daily precipitation	74.9 mm (2.9 in)	41 of 100 (Notable)
Vladikavkaz	Russia	Record high maximum temperature	24.8 C (76.6 F)	40 of 100 (Notable)
Ukiah	United States	Record high maximum temperature	20.0 C (68.0 F)	40 of 100 (Notable)
Brookings	United States	Record high maximum temperature	24.4 C (75.9 F)	40 of 100 (Notable)
McGrath AP	United States	Record daily snowfall	23.1 cm (9.1 in)	40 of 100 (Notable)
Chico UNIV Farm	United States	Record high maximum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Sacramento 5 ESE	United States	Record high maximum temperature	18.9 C (66.0 F)	39 of 100 (Notable)
Zoh Laguna	Mexico	Record daily precipitation	36.8 mm (1.4 in)	38 of 100 (Notable)
Macuspana (Dge)	Mexico	Record daily precipitation	103.4 mm (4.1 in)	38 of 100 (Notable)
Hovlandsdal	Norway	Record snow depth	53.0 cm (20.9 in)	38 of 100 (Notable)
Henichesk	Ukraine	Record high maximum temperature	12.6 C (54.7 F)	38 of 100 (Notable)
Healdsburg	United States	Record high maximum temperature	24.4 C (75.9 F)	38 of 100 (Notable)
Orland	United States	Record high maximum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Villa de Chiapilla	Mexico	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Union de San Antonio	Mexico	Record high maximum temperature	32.8 C (91.0 F)	37 of 100 (Notable)
Skei I Jolster	Norway	Record snow depth	83.0 cm (32.7 in)	37 of 100 (Notable)
Clearlake 4 SE	United States	Record high maximum temperature	23.9 C (75.0 F)	37 of 100 (Notable)
Gulkana AP	United States	Record high maximum temperature	9.4 C (48.9 F)	37 of 100 (Notable)
Fukui	Japan	Record daily precipitation	53.8 mm (2.1 in)	36 of 100 (Notable)
Rochford 2 WNW	United States	Record daily snowfall	8.9 cm (3.5 in)	35 of 100 (Notable)
Inhambupe	Brazil	Record daily precipitation	48.0 mm (1.9 in)	34 of 100 (Routine)
Valentia Observatory	Ireland	Record daily precipitation	35.9 mm (1.4 in)	34 of 100 (Routine)
Ahuacatlan	Mexico	Record low minimum temperature	1.7 C (35.1 F)	34 of 100 (Routine)
Sulak	Russia	Record high maximum temperature	8.6 C (47.5 F)	34 of 100 (Routine)
Bute: Rothesay	United Kingdom	Record daily precipitation	46.4 mm (1.8 in)	34 of 100 (Routine)
Lugansk	Ukraine	Record high maximum temperature	10.4 C (50.7 F)	34 of 100 (Routine)
San Jeronimito	Mexico	Record low minimum temperature	10.0 C (50.0 F)	33 of 100 (Routine)
Union de Tula	Mexico	Record low minimum temperature	-1.1 C (30.0 F)	33 of 100 (Routine)
El-Ton	Russia	Record high maximum temperature	6.4 C (43.5 F)	33 of 100 (Routine)
Benmore: Younger Botanic Garde	United Kingdom	Record daily precipitation	76.8 mm (3.0 in)	33 of 100 (Routine)
Graton	United States	Record high maximum temperature	21.7 C (71.1 F)	33 of 100 (Routine)
St Francisville	United States	Record daily precipitation	31.8 mm (1.3 in)	33 of 100 (Routine)
Matanuska Exp Farm	United States	Record daily snowfall	20.3 cm (8.0 in)	33 of 100 (Routine)
King Salmon	United States	Record daily snowfall	8.4 cm (3.3 in)	33 of 100 (Routine)
Seward AP	United States	Record daily precipitation	86.4 mm (3.4 in)	33 of 100 (Routine)

Counts by Type and Timescale

851 records

Records set or tied on 21 December 1999 by type: Highest daily maximum 163, Lowest daily maximum 94, Highest daily minimum 102, Lowest daily minimum 231, Heaviest daily rainfall 159, Heaviest daily snowfall 48, Deepest snow cover 54.

Records on 21 December 1999 by type
Record type	Records
Highest daily maximum	163
Lowest daily maximum	94
Highest daily minimum	102
Lowest daily minimum	231
Heaviest daily rainfall	159
Heaviest daily snowfall	48
Deepest snow cover	54

Records on 21 December 1999 by timescale: all-time 2, monthly 33, daily 816.

How Much Records Were Beaten By

695 broken records

Margins by which the 695 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 470.0. Ties are not counted.

Top 20 by Significance

21 December 1999

Top 20 records on 21 December 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 December 1999	Kenai AP, US	daily rain	47.2 mm (1.9 in)	40.8 mm (1.6 in)	45 years	63 of 100 (Major)
21 December 1999	Galway, IE	daily rain	35.9 mm (1.4 in)	8.4 mm (0.33 in)	110 years	56 of 100 (Notable)
21 December 1999	Sabancuy, MX	daily rain	94.0 mm (3.7 in)	89.2 mm (3.5 in)	38 years	55 of 100 (Notable)
21 December 1999	Sakai, JP	daily rain	59.9 mm (2.4 in)	35.1 mm (1.4 in)	40 years	54 of 100 (Notable)
21 December 1999	Ixtapa (Cfe), MX	daily rain	30.0 mm (1.2 in)	30.0 mm (1.2 in)	37 years	54 of 100 (Notable)
21 December 1999	Puntilla, US	daily snowfall	22.9 cm (9.0 in)	16.0 cm (6.3 in)	38 years	54 of 100 (Notable)
21 December 1999	Valdez WSO, US	daily rain	76.7 mm (3.0 in)	38.6 mm (1.5 in)	56 years	54 of 100 (Notable)
21 December 1999	Skwentna, US	monthly rain	94.2 mm (3.7 in)	23.1 mm (0.9 in)	28 years	52 of 100 (Notable)
21 December 1999	Skwentna, US	daily snowfall	43.2 cm (17.0 in)	31.8 cm (12.5 in)	45 years	52 of 100 (Notable)
21 December 1999	Cooper Lake Project, US	daily rain	90.4 mm (3.6 in)	63.5 mm (2.5 in)	13 years	48 of 100 (Notable)
21 December 1999	Myklebust I Breim, NO	daily snow depth	90.0 cm (35.4 in)	23.0 cm (9.1 in)	76 years	47 of 100 (Notable)
21 December 1999	Sandane, NO	daily snow depth	90.0 cm (35.4 in)	47.0 cm (18.5 in)	17 years	47 of 100 (Notable)
21 December 1999	Willows 6 W, US	daily high max	23.9 C (75.0 F)	5.6 C (10.1 F)	84 years	47 of 100 (Notable)
21 December 1999	Puente Colgante, MX	daily rain	28.7 mm (1.1 in)	28.7 mm (1.1 in)	48 years	46 of 100 (Notable)
21 December 1999	Tonsina, US	daily rain	26.4 mm (1.0 in)	19.8 mm (0.8 in)	5 years	44 of 100 (Notable)
21 December 1999	Jonuta, MX	daily rain	94.0 mm (3.7 in)	70.1 mm (2.8 in)	21 years	43 of 100 (Notable)
21 December 1999	Vik I Sogn III, NO	daily snow depth	54.0 cm (21.3 in)	10.0 cm (3.9 in)	80 years	43 of 100 (Notable)
21 December 1999	Vacaville, US	daily high max	23.9 C (75.0 F)	5.0 C (9.0 F)	69 years	43 of 100 (Notable)
21 December 1999	Davis 2 WSW Exp Farm, US	daily high max	22.8 C (73.0 F)	5.0 C (9.0 F)	69 years	42 of 100 (Notable)
21 December 1999	Talkeetna AP, US	monthly rain	64.5 mm (2.5 in)	9.6 mm (0.38 in)	31 years	42 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 1999

Records set or tied on this calendar date in each year from 1793 to 1999. 1999 had 851 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 1999-12-21: 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).

Histogram of margins by which records were beaten on 21 December 1999
Margin	Records
0 to 100	680
100 to 200	8
200 to 300	4
300 to 400	2
400 to 500	1