Weather Records on 9 December 1999

774 weather records were set or tied worldwide on 9 December 1999. Highest significance: De Soto, US.

Key Facts for 9 December 1999

On 9 December 1999, 774 weather records were set or tied at long-record stations worldwide.
196 were record highs and 137 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 16 monthly and 755 daily.
De Soto set a daily record precipitation of 72.6 mm (2.9 in) on 9 December 1999.
Across 157 earlier years (1796 to 2025) the same calendar date averaged 474 records.

Record Map

774 stations

774 station records on 9 December 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 December 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
De Soto	United States	Record daily precipitation	72.6 mm (2.9 in)	61 of 100 (Major)
Fazenda Laranjeiras	Brazil	Record daily precipitation	189.2 mm (7.4 in)	54 of 100 (Notable)
Steelville 2 N	United States	Record daily precipitation	52.3 mm (2.1 in)	54 of 100 (Notable)
Emporia ASOS	United States	Record daily precipitation	28.4 mm (1.1 in)	53 of 100 (Notable)
Jayuya	Puerto Rico [United States]	Record daily precipitation	44.7 mm (1.8 in)	52 of 100 (Notable)
Moberly	United States	Record daily precipitation	36.1 mm (1.4 in)	51 of 100 (Notable)
Andrelandia	Brazil	Record daily precipitation	92.6 mm (3.6 in)	50 of 100 (Notable)
Huetamo	Mexico	Record low maximum temperature	21.7 C (71.1 F)	50 of 100 (Notable)
Ibertioga	Brazil	Record daily precipitation	82.5 mm (3.2 in)	47 of 100 (Notable)
Springfield	United States	Record daily precipitation	70.4 mm (2.8 in)	47 of 100 (Notable)
Canyon	United States	Record snow depth	12.7 cm (5.0 in)	46 of 100 (Notable)
Marshall	United States	Record daily precipitation	26.7 mm (1.1 in)	46 of 100 (Notable)
Versailles	United States	Record daily precipitation	53.6 mm (2.1 in)	45 of 100 (Notable)
Ponca City Muni AP	United States	Record daily precipitation	42.9 mm (1.7 in)	45 of 100 (Notable)
Neosho Rapids	United States	Record daily precipitation	29.5 mm (1.2 in)	43 of 100 (Notable)
Ft Scott	United States	Record daily precipitation	30.5 mm (1.2 in)	42 of 100 (Notable)
Hereford	United States	Record daily snowfall	22.9 cm (9.0 in)	42 of 100 (Notable)
Risnes I Fjotland	Norway	Record daily precipitation	34.0 mm (1.3 in)	41 of 100 (Notable)
Aiuruoca	Brazil	Record daily precipitation	93.7 mm (3.7 in)	40 of 100 (Notable)
Ixtapa (Cfe)	Mexico	Record daily precipitation	39.9 mm (1.6 in)	40 of 100 (Notable)
Caledonia	United States	Record high maximum temperature	9.4 C (48.9 F)	40 of 100 (Notable)
Burbank	United States	Record daily precipitation	62.7 mm (2.5 in)	40 of 100 (Notable)
Stillwater 2 W	United States	Record daily precipitation	42.7 mm (1.7 in)	40 of 100 (Notable)
Carvalhos	Brazil	Record daily precipitation	88.9 mm (3.5 in)	39 of 100 (Notable)
Lookeba 1 N	United States	Record daily precipitation	50.8 mm (2.0 in)	39 of 100 (Notable)
Hereford	United States	Record snow depth	22.9 cm (9.0 in)	39 of 100 (Notable)
Lubbock	United States	Record daily snowfall	17.8 cm (7.0 in)	39 of 100 (Notable)
Crookwell Post Office	Australia	Record daily precipitation	60.0 mm (2.4 in)	38 of 100 (Notable)
Finca Hamburgo	Mexico	Record low minimum temperature	11.7 C (53.1 F)	38 of 100 (Notable)
Perry	United States	Record daily precipitation	47.5 mm (1.9 in)	38 of 100 (Notable)
Vichy Rolla Natl AP	United States	Record daily precipitation	48.0 mm (1.9 in)	38 of 100 (Notable)
Coyame (Cfe)	Mexico	Record daily precipitation	251.2 mm (9.9 in)	37 of 100 (Notable)
Peck 4 SSW	United States	Record daily precipitation	31.8 mm (1.3 in)	37 of 100 (Notable)
Wingate	United States	Record daily precipitation	31.2 mm (1.2 in)	37 of 100 (Notable)
Marshall	United States	Record daily precipitation	33.0 mm (1.3 in)	36 of 100 (Notable)
Ralston	United States	Record daily precipitation	38.1 mm (1.5 in)	36 of 100 (Notable)
Olton	United States	Record daily snowfall	10.2 cm (4.0 in)	36 of 100 (Notable)
Wichita	United States	Record daily precipitation	26.7 mm (1.1 in)	36 of 100 (Notable)
Rosalia 1NW	United States	Record daily precipitation	25.4 mm (1.0 in)	35 of 100 (Notable)
Thrall 3SSE	United States	Record daily precipitation	31.2 mm (1.2 in)	35 of 100 (Notable)
Vandalia	United States	Record daily precipitation	30.5 mm (1.2 in)	34 of 100 (Routine)
Dimmitt	United States	Record snow depth	10.2 cm (4.0 in)	34 of 100 (Routine)
Omak 4 N	United States	Record daily snowfall	17.8 cm (7.0 in)	34 of 100 (Routine)
Curtin Springs	Australia	Record daily precipitation	25.0 mm (1.0 in)	33 of 100 (Routine)
Roosevelt	United States	Record daily precipitation	44.7 mm (1.8 in)	33 of 100 (Routine)
Fazenda Paraiba	Brazil	Record daily precipitation	146.1 mm (5.8 in)	32 of 100 (Routine)
Caplinger Mills	United States	Record daily precipitation	31.8 mm (1.3 in)	32 of 100 (Routine)
Unity	United States	Record daily snowfall	10.2 cm (4.0 in)	32 of 100 (Routine)
Canyon	United States	Record daily snowfall	12.7 cm (5.0 in)	32 of 100 (Routine)
Usina Do Chicao	Brazil	Record daily precipitation	70.2 mm (2.8 in)	31 of 100 (Routine)
Santa Rita Tlahuapan	Mexico	Record low maximum temperature	10.6 C (51.1 F)	31 of 100 (Routine)
Cassoday 2SE	United States	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Oxford	United States	Record daily precipitation	31.0 mm (1.2 in)	31 of 100 (Routine)
Friona	United States	Record daily snowfall	16.5 cm (6.5 in)	31 of 100 (Routine)
Tubbul (Keiraville)	Australia	Record daily precipitation	36.0 mm (1.4 in)	30 of 100 (Routine)
Crescent 5WSW	United States	Record daily precipitation	60.2 mm (2.4 in)	30 of 100 (Routine)
Mauston 1 SE	United States	Record high maximum temperature	12.8 C (55.0 F)	30 of 100 (Routine)
Baependi	Brazil	Record daily precipitation	69.0 mm (2.7 in)	29 of 100 (Routine)
La Concha	Mexico	Record low minimum temperature	8.9 C (48.0 F)	29 of 100 (Routine)
Shawneetown Old Town	United States	Record daily precipitation	38.9 mm (1.5 in)	29 of 100 (Routine)

Counts by Type and Timescale

774 records

Records set or tied on 9 December 1999 by type: Highest daily maximum 97, Lowest daily maximum 34, Highest daily minimum 99, Lowest daily minimum 103, Heaviest daily rainfall 399, Heaviest daily snowfall 25, Deepest snow cover 17.

Records on 9 December 1999 by type
Record type	Records
Highest daily maximum	97
Lowest daily maximum	34
Highest daily minimum	99
Lowest daily minimum	103
Heaviest daily rainfall	399
Heaviest daily snowfall	25
Deepest snow cover	17

Records on 9 December 1999 by timescale: all-time 3, monthly 16, daily 755.

How Much Records Were Beaten By

647 broken records

Margins by which the 647 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 178.0. Ties are not counted.

Top 20 by Significance

9 December 1999

Top 20 records on 9 December 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 December 1999	De Soto, US	daily rain	72.6 mm (2.9 in)	49.0 mm (1.9 in)	42 years	61 of 100 (Major)
9 December 1999	Fazenda Laranjeiras, BR	all-time rain	189.2 mm (7.4 in)	44.8 mm (1.8 in)	14 years	54 of 100 (Notable)
9 December 1999	Steelville 2 N, US	daily rain	52.3 mm (2.1 in)	38.8 mm (1.5 in)	42 years	54 of 100 (Notable)
9 December 1999	Emporia ASOS, US	daily rain	28.4 mm (1.1 in)	24.6 mm (1.0 in)	26 years	53 of 100 (Notable)
9 December 1999	Jayuya, PR	daily rain	44.7 mm (1.8 in)	29.5 mm (1.2 in)	60 years	52 of 100 (Notable)
9 December 1999	Moberly, US	daily rain	36.1 mm (1.4 in)	27.5 mm (1.1 in)	56 years	51 of 100 (Notable)
9 December 1999	Andrelandia, BR	daily rain	92.6 mm (3.6 in)	58.2 mm (2.3 in)	30 years	50 of 100 (Notable)
9 December 1999	Huetamo, MX	daily low max	21.7 C (71.1 F)	6.6 C (11.9 F)	73 years	50 of 100 (Notable)
9 December 1999	Ibertioga, BR	daily rain	82.5 mm (3.2 in)	49.7 mm (2.0 in)	28 years	47 of 100 (Notable)
9 December 1999	Springfield, US	daily rain	70.4 mm (2.8 in)	31.0 mm (1.2 in)	52 years	47 of 100 (Notable)
9 December 1999	Canyon, US	daily snow depth	12.7 cm (5.0 in)	12.7 cm (5.0 in)	76 years	46 of 100 (Notable)
9 December 1999	Marshall, US	daily rain	26.7 mm (1.1 in)	8.7 mm (0.34 in)	88 years	46 of 100 (Notable)
9 December 1999	Versailles, US	daily rain	53.6 mm (2.1 in)	30.2 mm (1.2 in)	28 years	45 of 100 (Notable)
9 December 1999	Ponca City Muni AP, US	daily rain	42.9 mm (1.7 in)	36.0 mm (1.4 in)	6 years	45 of 100 (Notable)
9 December 1999	Neosho Rapids, US	daily rain	29.5 mm (1.2 in)	17.3 mm (0.7 in)	56 years	43 of 100 (Notable)
9 December 1999	Ft Scott, US	daily rain	30.5 mm (1.2 in)	7.1 mm (0.28 in)	88 years	42 of 100 (Notable)
9 December 1999	Hereford, US	daily snowfall	22.9 cm (9.0 in)	10.2 cm (4.0 in)	56 years	42 of 100 (Notable)
9 December 1999	Risnes I Fjotland, NO	daily rain	34.0 mm (1.3 in)	1.7 mm (0.07 in)	100 years	41 of 100 (Notable)
9 December 1999	Aiuruoca, BR	daily rain	93.7 mm (3.7 in)	40.5 mm (1.6 in)	46 years	40 of 100 (Notable)
9 December 1999	Ixtapa (Cfe), MX	monthly rain	39.9 mm (1.6 in)	12.0 mm (0.5 in)	27 years	40 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

1796 to 1999

Records set or tied on this calendar date in each year from 1796 to 1999. 1999 had 774 records.

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

Records on 12-09 in each year
Year	Records
1796	1
1820	1
1825	3
1831	1
1844	1
1856	1
1860	1
1862	1
1867	2
1868	1
1869	1
1871	3
1872	1
1873	2
1876	2
1878	4
1879	9
1880	1
1882	3
1883	1
1885	2
1886	2
1887	1
1889	1
1891	3
1893	1
1894	1
1895	3
1896	1
1897	4
1898	3
1899	5
1900	1
1901	4
1902	18
1903	7
1904	2
1905	9
1906	15
1907	28
1908	5
1909	18
1910	36
1911	31
1912	18
1913	37
1914	57
1915	139
1916	366
1917	106
1918	40
1919	58
1920	221
1921	58
1922	311
1923	203
1924	164
1925	93
1926	113
1927	356
1928	110
1929	192
1930	211
1931	434
1932	339
1933	250
1934	364
1935	263
1936	143
1937	348
1938	329
1939	1,030
1940	251
1941	144
1942	370
1943	496
1944	327
1945	178
1946	1,308
1947	303
1948	278
1949	299
1950	382
1951	849
1952	553
1953	347
1954	226
1955	352
1956	672
1957	565
1958	678
1959	217
1960	426
1961	818
1962	377
1963	642
1964	547
1965	706
1966	968
1967	639
1968	482
1969	347
1970	987
1971	655
1972	1,776
1973	679
1974	629
1975	668
1976	868
1977	1,548
1978	2,060
1979	693
1980	760
1981	748
1982	589
1983	664
1984	588
1985	1,074
1986	658
1987	1,007
1988	939
1989	1,270
1990	844
1991	878
1992	791
1993	912
1994	1,071
1995	1,247
1996	946
1997	1,214
1998	769
1999	774
2000	920
2001	505
2002	1,052
2003	824
2004	1,108
2005	1,714
2006	1,718
2007	1,124
2008	1,052
2009	2,442
2010	1,726
2011	496
2012	753
2013	1,018
2014	510
2015	1,054
2016	679
2017	715
2018	626
2019	614
2020	571
2021	674
2022	666
2023	907
2024	422
2025	1,602

Download the Data

Data for records on 1999-12-09: 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	601
25 to 50	26
50 to 75	12
75 to 100	1
100 to 125	3
125 to 150	2
150 to 175	1
175 to 200	1