Weather Records on 21 October 1999

688 weather records were set or tied worldwide on 21 October 1999. Highest significance: Naalehu 14, US.

Key Facts for 21 October 1999

On 21 October 1999, 688 weather records were set or tied at long-record stations worldwide.
242 were record highs and 280 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 21 monthly and 665 daily.
Naalehu 14 set a daily record precipitation of 77.2 mm (3.0 in) on 21 October 1999.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 418 records.

Record Map

688 stations

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

Weather records on 21 October 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Naalehu 14	United States	Record daily precipitation	77.2 mm (3.0 in)	59 of 100 (Notable)
Ponferrada	Spain	Record daily precipitation	45.3 mm (1.8 in)	55 of 100 (Notable)
Samaria	Mexico	Record daily precipitation	192.8 mm (7.6 in)	52 of 100 (Notable)
Sabancuy	Mexico	Record daily precipitation	99.3 mm (3.9 in)	51 of 100 (Notable)
Paraiso	Mexico	Record daily precipitation	244.1 mm (9.6 in)	51 of 100 (Notable)
Napoopoo 28	United States	Record daily precipitation	43.2 mm (1.7 in)	50 of 100 (Notable)
Apazulco	Mexico	Record low minimum temperature	14.4 C (57.9 F)	48 of 100 (Notable)
Cardenas	Mexico	Record daily precipitation	202.9 mm (8.0 in)	47 of 100 (Notable)
Kapapala Rch 36	United States	Record daily precipitation	96.5 mm (3.8 in)	47 of 100 (Notable)
Kulani Camp 79	United States	Record daily precipitation	67.3 mm (2.6 in)	46 of 100 (Notable)
Hillview	Australia	Record daily precipitation	54.2 mm (2.1 in)	44 of 100 (Notable)
Roma Ciampino	Italy	Record daily precipitation	51.8 mm (2.0 in)	44 of 100 (Notable)
Tasiilaq	Greenland [Denmark]	Record high minimum temperature	5.4 C (41.7 F)	42 of 100 (Notable)
Centro Experimental W-75	Mexico	Record daily precipitation	176.8 mm (7.0 in)	41 of 100 (Notable)
Milan	Italy	Record daily precipitation	68.0 mm (2.7 in)	40 of 100 (Notable)
Tuapse	Russia	Record daily precipitation	52.2 mm (2.1 in)	39 of 100 (Notable)
Archbold Bio STN	United States	Record daily precipitation	48.3 mm (1.9 in)	39 of 100 (Notable)
Carrollton	United States	Record low maximum temperature	15.0 C (59.0 F)	38 of 100 (Notable)
Monticello	United States	Record low minimum temperature	-4.4 C (24.1 F)	38 of 100 (Notable)
Molokai Kaunakakai Molokai AP	United States	Record low maximum temperature	23.9 C (75.0 F)	38 of 100 (Notable)
Rosedale Post Office	Australia	Record daily precipitation	28.4 mm (1.1 in)	36 of 100 (Notable)
Point Lookout Bowls Club	Australia	Record daily precipitation	79.8 mm (3.1 in)	36 of 100 (Notable)
Gondar	Ethiopia	Record daily precipitation	48.0 mm (1.9 in)	36 of 100 (Notable)
Ixcateopan de Tlapa	Mexico	Record daily precipitation	47.8 mm (1.9 in)	36 of 100 (Notable)
Kuching	Malaysia	Record daily precipitation	80.0 mm (3.1 in)	36 of 100 (Notable)
Wickenburg	United States	Record high maximum temperature	35.6 C (96.1 F)	36 of 100 (Notable)
Canal Pt USDA	United States	Record daily precipitation	90.2 mm (3.6 in)	36 of 100 (Notable)
Cdu Katherine Rural Campus	Australia	Record daily precipitation	26.4 mm (1.0 in)	35 of 100 (Notable)
San Andres (Isla)/S	Colombia	Record daily precipitation	333.0 mm (13.1 in)	35 of 100 (Notable)
Desoto City 8 SW	United States	Record daily precipitation	58.4 mm (2.3 in)	35 of 100 (Notable)
McDermitt	United States	Record high maximum temperature	26.7 C (80.1 F)	35 of 100 (Notable)
Jackson	United States	Record daily precipitation	41.4 mm (1.6 in)	35 of 100 (Notable)
Haleakala Rs 338	United States	Record daily precipitation	49.0 mm (1.9 in)	35 of 100 (Notable)
Honaunau 27	United States	Record daily precipitation	43.2 mm (1.7 in)	35 of 100 (Notable)
Westwood Store	Australia	Record daily precipitation	42.0 mm (1.7 in)	34 of 100 (Routine)
Shahat	Libya	Record high minimum temperature	21.0 C (69.8 F)	34 of 100 (Routine)
Sandakan	Malaysia	Record low maximum temperature	27.0 C (80.6 F)	34 of 100 (Routine)
Hamakuapoko 485	United States	Record daily precipitation	31.8 mm (1.3 in)	34 of 100 (Routine)
Hawaii Vol Np HQ 54	United States	Record daily precipitation	57.9 mm (2.3 in)	34 of 100 (Routine)
Millstream	Australia	Record daily precipitation	35.6 mm (1.4 in)	33 of 100 (Routine)
Qinzhou	China	Record daily precipitation	74.9 mm (2.9 in)	33 of 100 (Routine)
Bochil	Mexico	Record low maximum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Lanihau 68.2	United States	Record daily precipitation	61.7 mm (2.4 in)	33 of 100 (Routine)
Euleilah Creek	Australia	Record daily precipitation	38.8 mm (1.5 in)	32 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record high minimum temperature	14.6 C (58.3 F)	32 of 100 (Routine)
Bastia	France	Record daily precipitation	90.8 mm (3.6 in)	32 of 100 (Routine)
San Francisco	Mexico	Record low maximum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Black Rvr Pumps	United States	Record high maximum temperature	32.2 C (90.0 F)	32 of 100 (Routine)
Fort Drum	United States	Record daily precipitation	40.6 mm (1.6 in)	32 of 100 (Routine)
Fairymead Sugar Mill	Australia	Record daily precipitation	25.1 mm (1.0 in)	30 of 100 (Routine)
Cleveland Bowls Club	Australia	Record daily precipitation	50.4 mm (2.0 in)	30 of 100 (Routine)
Tenosique (Smn)	Mexico	Record daily precipitation	52.6 mm (2.1 in)	30 of 100 (Routine)
Big Creek Ph 1	United States	Record high minimum temperature	14.4 C (57.9 F)	30 of 100 (Routine)
Cove 1 E	United States	Record high maximum temperature	24.4 C (75.9 F)	30 of 100 (Routine)
Gold Beach Rs	United States	Record low maximum temperature	7.8 C (46.0 F)	30 of 100 (Routine)
Nanning	China	Record daily precipitation	52.6 mm (2.1 in)	29 of 100 (Routine)
Metalanim	Federated States of Micronesia	Record low minimum temperature	17.2 C (63.0 F)	29 of 100 (Routine)
La Tinaja	Mexico	Record high maximum temperature	28.9 C (84.0 F)	29 of 100 (Routine)
Boquilla Numero Uno	Mexico	Record low maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Dzilam de Bravo	Mexico	Record daily precipitation	73.9 mm (2.9 in)	29 of 100 (Routine)

Counts by Type and Timescale

688 records

Records set or tied on 21 October 1999 by type: Highest daily maximum 150, Lowest daily maximum 128, Highest daily minimum 92, Lowest daily minimum 152, Heaviest daily rainfall 163, Heaviest daily snowfall 1, Deepest snow cover 2.

Records on 21 October 1999 by type
Record type	Records
Highest daily maximum	150
Lowest daily maximum	128
Highest daily minimum	92
Lowest daily minimum	152
Heaviest daily rainfall	163
Heaviest daily snowfall	1
Deepest snow cover	2

Records on 21 October 1999 by timescale: all-time 2, monthly 21, daily 665.

How Much Records Were Beaten By

517 broken records

Margins by which the 517 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 118.1. Ties are not counted.

Top 20 by Significance

21 October 1999

Top 20 records on 21 October 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1999	Naalehu 14, US	daily rain	77.2 mm (3.0 in)	37.8 mm (1.5 in)	80 years	59 of 100 (Notable)
21 October 1999	Ponferrada, ES	daily rain	45.3 mm (1.8 in)	32.2 mm (1.3 in)	38 years	55 of 100 (Notable)
21 October 1999	Samaria, MX	daily rain	192.8 mm (7.6 in)	111.0 mm (4.4 in)	33 years	52 of 100 (Notable)
21 October 1999	Sabancuy, MX	daily rain	99.3 mm (3.9 in)	63.5 mm (2.5 in)	33 years	51 of 100 (Notable)
21 October 1999	Paraiso, MX	all-time rain	244.1 mm (9.6 in)	44.2 mm (1.7 in)	42 years	51 of 100 (Notable)
21 October 1999	Napoopoo 28, US	daily rain	43.2 mm (1.7 in)	19.6 mm (0.8 in)	78 years	50 of 100 (Notable)
21 October 1999	Apazulco, MX	daily low min	14.4 C (57.9 F)	5.0 C (9.0 F)	24 years	48 of 100 (Notable)
21 October 1999	Cardenas, MX	daily rain	202.9 mm (8.0 in)	118.1 mm (4.6 in)	25 years	47 of 100 (Notable)
21 October 1999	Kapapala Rch 36, US	daily rain	96.5 mm (3.8 in)	79.2 mm (3.1 in)	14 years	47 of 100 (Notable)
21 October 1999	Kulani Camp 79, US	daily rain	67.3 mm (2.6 in)	29.2 mm (1.1 in)	46 years	46 of 100 (Notable)
21 October 1999	Hillview, AU	daily rain	54.2 mm (2.1 in)	43.4 mm (1.7 in)	24 years	44 of 100 (Notable)
21 October 1999	Roma Ciampino, IT	daily rain	51.8 mm (2.0 in)	35.8 mm (1.4 in)	41 years	44 of 100 (Notable)
21 October 1999	Tasiilaq, GL	daily high min	5.4 C (41.7 F)	1.6 C (2.9 F)	93 years	42 of 100 (Notable)
21 October 1999	Centro Experimental W-75, MX	daily rain	176.8 mm (7.0 in)	89.4 mm (3.5 in)	33 years	41 of 100 (Notable)
21 October 1999	Milan, IT	daily rain	68.0 mm (2.7 in)	0.6 mm (0.02 in)	107 years	40 of 100 (Notable)
21 October 1999	Tuapse, RU	daily rain	52.2 mm (2.1 in)	26.1 mm (1.0 in)	44 years	39 of 100 (Notable)
21 October 1999	Archbold Bio STN, US	daily rain	48.3 mm (1.9 in)	43.0 mm (1.7 in)	28 years	39 of 100 (Notable)
21 October 1999	Carrollton, US	daily low max	15.0 C (59.0 F)	0.6 C (1.1 F)	93 years	38 of 100 (Notable)
21 October 1999	Monticello, US	daily low min	-4.4 C (24.1 F)	3.3 C (5.9 F)	81 years	38 of 100 (Notable)
21 October 1999	Molokai Kaunakakai Molokai AP, US	daily low max	23.9 C (75.0 F)	2.8 C (5.0 F)	46 years	38 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

1795 to 1999

Records set or tied on this calendar date in each year from 1795 to 1999. 1999 had 688 records.

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

Records on 10-21 in each year
Year	Records
1795	1
1802	2
1805	1
1808	1
1810	1
1834	1
1835	1
1840	1
1845	1
1847	1
1850	1
1851	2
1854	1
1859	1
1863	1
1864	1
1866	3
1867	1
1868	3
1869	2
1871	1
1872	1
1873	1
1874	1
1876	4
1877	2
1878	1
1880	3
1881	1
1883	1
1886	1
1888	2
1889	2
1890	3
1891	6
1892	6
1893	1
1894	1
1895	2
1896	5
1898	6
1899	3
1900	2
1901	9
1902	2
1903	3
1904	30
1905	15
1906	11
1907	35
1908	35
1909	19
1910	21
1911	10
1912	18
1913	59
1914	35
1915	43
1916	70
1917	208
1918	18
1919	102
1920	149
1921	58
1922	78
1923	81
1924	389
1925	150
1926	77
1927	187
1928	78
1929	200
1930	492
1931	217
1932	165
1933	733
1934	407
1935	707
1936	407
1937	132
1938	121
1939	491
1940	537
1941	644
1942	258
1943	421
1944	367
1945	538
1946	297
1947	977
1948	266
1949	1,015
1950	438
1951	382
1952	848
1953	1,579
1954	279
1955	481
1956	276
1957	511
1958	322
1959	410
1960	408
1961	553
1962	359
1963	725
1964	457
1965	465
1966	425
1967	472
1968	174
1969	881
1970	548
1971	498
1972	813
1973	464
1974	866
1975	509
1976	1,467
1977	451
1978	616
1979	1,958
1980	378
1981	667
1982	870
1983	786
1984	1,872
1985	776
1986	814
1987	852
1988	696
1989	1,668
1990	807
1991	877
1992	1,095
1993	845
1994	670
1995	1,120
1996	1,581
1997	915
1998	711
1999	688
2000	771
2001	610
2002	1,241
2003	2,066
2004	1,674
2005	949
2006	1,057
2007	916
2008	610
2009	713
2010	710
2011	662
2012	703
2013	440
2014	716
2015	493
2016	734
2017	750
2018	440
2019	757
2020	1,135
2021	574
2022	629
2023	890
2024	1,138
2025	364

Download the Data

Data for records on 1999-10-21: 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 20	475
20 to 40	31
40 to 60	5
60 to 80	3
80 to 100	1
100 to 120	2