Weather Records on 20 October 1999

603 weather records were set or tied worldwide on 20 October 1999. Highest significance: Telchaquillo, MX.

Key Facts for 20 October 1999

On 20 October 1999, 603 weather records were set or tied at long-record stations worldwide.
183 were record highs and 299 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 15 monthly and 588 daily.
Telchaquillo set a daily record precipitation of 79.8 mm (3.1 in) on 20 October 1999.
Across 160 earlier years (1806 to 2025) the same calendar date averaged 456 records.

Record Map

603 stations

603 station records on 20 October 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 October 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Telchaquillo	Mexico	Record daily precipitation	79.8 mm (3.1 in)	54 of 100 (Notable)
Qionghai	China	Record daily precipitation	174.8 mm (6.9 in)	49 of 100 (Notable)
Pueblo Nuevo	Mexico	Record daily precipitation	162.6 mm (6.4 in)	48 of 100 (Notable)
Lerma	Mexico	Record daily precipitation	60.5 mm (2.4 in)	46 of 100 (Notable)
Metehara	Ethiopia	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
Milan	Italy	Record low maximum temperature	8.2 C (46.8 F)	43 of 100 (Notable)
Huehuetan	Mexico	Record daily precipitation	105.9 mm (4.2 in)	42 of 100 (Notable)
Cardenas	Mexico	Record daily precipitation	187.5 mm (7.4 in)	42 of 100 (Notable)
Samaria	Mexico	Record daily precipitation	162.1 mm (6.4 in)	42 of 100 (Notable)
Kilauea 1134	United States	Record daily precipitation	46.7 mm (1.8 in)	41 of 100 (Notable)
Tasiilaq	Greenland [Denmark]	Record high minimum temperature	5.3 C (41.5 F)	40 of 100 (Notable)
Pierce 1 E	United States	Record low maximum temperature	17.2 C (63.0 F)	40 of 100 (Notable)
Soria	Spain	Record daily precipitation	26.0 mm (1.0 in)	39 of 100 (Notable)
Mauna Loa Slope Obs 39	United States	Record daily precipitation	28.2 mm (1.1 in)	38 of 100 (Notable)
Gospic	Croatia	Record low maximum temperature	5.1 C (41.2 F)	37 of 100 (Notable)
Beeville 5 NE	United States	Record low maximum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Mana 1026	United States	Record daily precipitation	61.2 mm (2.4 in)	37 of 100 (Notable)
Napoopoo 28	United States	Record daily precipitation	26.7 mm (1.1 in)	37 of 100 (Notable)
Opihihale #2 24.1	United States	Record low maximum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Opihihale #2 24.1	United States	Record daily precipitation	54.1 mm (2.1 in)	37 of 100 (Notable)
Aberdeen	United States	Record low maximum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Cap Cepet	France	Record daily precipitation	84.6 mm (3.3 in)	35 of 100 (Notable)
Naalehu 14	United States	Record high maximum temperature	30.0 C (86.0 F)	35 of 100 (Notable)
Bastia	France	Record daily precipitation	91.2 mm (3.6 in)	34 of 100 (Routine)
Paraiso	Mexico	Record daily precipitation	105.2 mm (4.1 in)	33 of 100 (Routine)
Barcelona -Fabra Observatory	Spain	Record daily precipitation	46.1 mm (1.8 in)	33 of 100 (Routine)
Crescent City 3 NNW	United States	Record low maximum temperature	10.0 C (50.0 F)	33 of 100 (Routine)
Wyndham	Australia	Record low maximum temperature	28.4 C (83.1 F)	32 of 100 (Routine)
Khon Kaen	Thailand	Record low maximum temperature	22.7 C (72.9 F)	32 of 100 (Routine)
McCloud	United States	Record high maximum temperature	28.3 C (82.9 F)	32 of 100 (Routine)
Brookings	United States	Record low maximum temperature	9.4 C (48.9 F)	32 of 100 (Routine)
Honolulu Intl AP	United States	Record low maximum temperature	25.6 C (78.1 F)	32 of 100 (Routine)
Kimberley Res.Station	Australia	Record daily precipitation	37.2 mm (1.5 in)	31 of 100 (Routine)
Liberec	Czech Republic	Record low minimum temperature	-5.9 C (21.4 F)	31 of 100 (Routine)
Barcelos	Portugal	Record daily precipitation	83.0 mm (3.3 in)	31 of 100 (Routine)
Almeria/Aeropuerto	Spain	Record daily precipitation	29.7 mm (1.2 in)	31 of 100 (Routine)
Port Alsworth	United States	Record snow depth	15.2 cm (6.0 in)	31 of 100 (Routine)
Kemoo Camp 8 855	United States	Record daily precipitation	78.7 mm (3.1 in)	31 of 100 (Routine)
Niu Ridge 1035	United States	Record daily precipitation	47.0 mm (1.9 in)	31 of 100 (Routine)
Telpatlan	Mexico	Record daily precipitation	26.9 mm (1.1 in)	30 of 100 (Routine)
Pervomajskoe	Russia	Record high maximum temperature	14.4 C (57.9 F)	30 of 100 (Routine)
Tustin Irvine Rch	United States	Record high maximum temperature	38.3 C (100.9 F)	30 of 100 (Routine)
Port Orford #2	United States	Record low minimum temperature	-1.1 C (30.0 F)	30 of 100 (Routine)
El Socorro	Mexico	Record low minimum temperature	2.8 C (37.0 F)	29 of 100 (Routine)
San Juan Chamula	Mexico	Record high maximum temperature	28.9 C (84.0 F)	29 of 100 (Routine)
Minusinsk	Russia	Record high maximum temperature	17.7 C (63.9 F)	29 of 100 (Routine)
Phrae	Thailand	Record low maximum temperature	27.0 C (80.6 F)	29 of 100 (Routine)
Udon Thani	Thailand	Record low maximum temperature	22.7 C (72.9 F)	29 of 100 (Routine)
Estacada 2 SE	United States	Record high maximum temperature	27.2 C (81.0 F)	29 of 100 (Routine)
Encinal	United States	Record low maximum temperature	13.3 C (55.9 F)	29 of 100 (Routine)
Hilo Intl AP 87	United States	Record low maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Poza Rica	Mexico	Record low maximum temperature	20.6 C (69.1 F)	28 of 100 (Routine)
Chicxulub Puerto	Mexico	Record daily precipitation	41.9 mm (1.6 in)	28 of 100 (Routine)
Moron de la Frontera	Spain	Record daily precipitation	44.6 mm (1.8 in)	28 of 100 (Routine)
Santa Paula	United States	Record high maximum temperature	36.7 C (98.1 F)	28 of 100 (Routine)
Colstrip	United States	Record high minimum temperature	11.1 C (52.0 F)	28 of 100 (Routine)
Port Angeles	United States	Record high maximum temperature	19.4 C (66.9 F)	28 of 100 (Routine)
Waialua 847	United States	Record low maximum temperature	21.7 C (71.1 F)	28 of 100 (Routine)
Jimma	Ethiopia	Record low maximum temperature	23.0 C (73.4 F)	27 of 100 (Routine)
Tula	Mexico	Record low maximum temperature	13.9 C (57.0 F)	27 of 100 (Routine)

Counts by Type and Timescale

603 records

Records set or tied on 20 October 1999 by type: Highest daily maximum 111, Lowest daily maximum 176, Highest daily minimum 72, Lowest daily minimum 123, Heaviest daily rainfall 120, Deepest snow cover 1.

Records on 20 October 1999 by type
Record type	Records
Highest daily maximum	111
Lowest daily maximum	176
Highest daily minimum	72
Lowest daily minimum	123
Heaviest daily rainfall	120
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 20 October 1999 by timescale: all-time 0, monthly 15, daily 588.

How Much Records Were Beaten By

466 broken records

Margins by which the 466 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 139.3. Ties are not counted.

Top 20 by Significance

20 October 1999

Top 20 records on 20 October 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 October 1999	Telchaquillo, MX	daily rain	79.8 mm (3.1 in)	68.9 mm (2.7 in)	33 years	54 of 100 (Notable)
20 October 1999	Qionghai, CN	daily rain	174.8 mm (6.9 in)	139.3 mm (5.5 in)	18 years	49 of 100 (Notable)
20 October 1999	Pueblo Nuevo, MX	daily rain	162.6 mm (6.4 in)	97.6 mm (3.8 in)	25 years	48 of 100 (Notable)
20 October 1999	Lerma, MX	daily rain	60.5 mm (2.4 in)	39.2 mm (1.5 in)	4 years	46 of 100 (Notable)
20 October 1999	Metehara, ET	daily rain	29.0 mm (1.1 in)	26.0 mm (1.0 in)	20 years	43 of 100 (Notable)
20 October 1999	Milan, IT	daily low max	8.2 C (46.8 F)	1.2 C (2.2 F)	220 years	43 of 100 (Notable)
20 October 1999	Huehuetan, MX	daily rain	105.9 mm (4.2 in)	74.9 mm (2.9 in)	8 years	42 of 100 (Notable)
20 October 1999	Cardenas, MX	daily rain	187.5 mm (7.4 in)	93.5 mm (3.7 in)	34 years	42 of 100 (Notable)
20 October 1999	Samaria, MX	daily rain	162.1 mm (6.4 in)	91.2 mm (3.6 in)	25 years	42 of 100 (Notable)
20 October 1999	Kilauea 1134, US	daily rain	46.7 mm (1.8 in)	17.5 mm (0.7 in)	62 years	41 of 100 (Notable)
20 October 1999	Tasiilaq, GL	daily high min	5.3 C (41.5 F)	1.9 C (3.4 F)	84 years	40 of 100 (Notable)
20 October 1999	Pierce 1 E, US	daily low max	17.2 C (63.0 F)	1.7 C (3.1 F)	92 years	40 of 100 (Notable)
20 October 1999	Soria, ES	daily rain	26.0 mm (1.0 in)	13.8 mm (0.5 in)	44 years	39 of 100 (Notable)
20 October 1999	Mauna Loa Slope Obs 39, US	daily rain	28.2 mm (1.1 in)	15.2 mm (0.6 in)	41 years	38 of 100 (Notable)
20 October 1999	Gospic, HR	daily low max	5.1 C (41.2 F)	0.4 C (0.7 F)	90 years	37 of 100 (Notable)
20 October 1999	Beeville 5 NE, US	daily low max	17.8 C (64.0 F)	0.5 C (0.9 F)	88 years	37 of 100 (Notable)
20 October 1999	Mana 1026, US	daily rain	61.2 mm (2.4 in)	17.5 mm (0.7 in)	62 years	37 of 100 (Notable)
20 October 1999	Napoopoo 28, US	daily rain	26.7 mm (1.1 in)	8.9 mm (0.35 in)	69 years	37 of 100 (Notable)
20 October 1999	Opihihale #2 24.1, US	monthly low max	20.0 C (68.0 F)	1.7 C (3.1 F)	40 years	37 of 100 (Notable)
20 October 1999	Opihihale #2 24.1, US	daily rain	54.1 mm (2.1 in)	31.7 mm (1.2 in)	12 years	37 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

1806 to 1999

Records set or tied on this calendar date in each year from 1806 to 1999. 1999 had 603 records.

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

Records on 10-20 in each year
Year	Records
1806	1
1835	1
1844	1
1846	1
1847	2
1851	1
1852	1
1858	1
1863	2
1864	2
1866	3
1867	1
1868	2
1872	2
1874	2
1875	3
1876	2
1877	1
1878	1
1880	3
1881	2
1884	1
1885	1
1886	1
1887	1
1888	6
1891	4
1892	4
1893	1
1894	3
1895	4
1896	9
1897	2
1898	7
1899	1
1900	8
1901	7
1902	5
1903	9
1904	13
1905	22
1906	28
1907	32
1908	26
1909	17
1910	31
1911	16
1912	6
1913	38
1914	16
1915	20
1916	72
1917	201
1918	34
1919	19
1920	81
1921	68
1922	83
1923	96
1924	182
1925	247
1926	147
1927	283
1928	92
1929	129
1930	672
1931	125
1932	331
1933	675
1934	422
1935	390
1936	370
1937	189
1938	231
1939	367
1940	757
1941	459
1942	152
1943	501
1944	288
1945	363
1946	310
1947	1,494
1948	320
1949	1,084
1950	619
1951	279
1952	520
1953	1,057
1954	262
1955	529
1956	283
1957	440
1958	461
1959	451
1960	671
1961	479
1962	733
1963	765
1964	598
1965	340
1966	857
1967	511
1968	244
1969	607
1970	710
1971	606
1972	1,724
1973	878
1974	1,122
1975	587
1976	1,304
1977	467
1978	508
1979	1,647
1980	350
1981	1,083
1982	1,191
1983	944
1984	1,562
1985	835
1986	823
1987	590
1988	737
1989	2,092
1990	609
1991	971
1992	1,174
1993	1,238
1994	650
1995	703
1996	1,417
1997	949
1998	683
1999	603
2000	737
2001	589
2002	985
2003	1,761
2004	1,861
2005	1,092
2006	1,170
2007	923
2008	477
2009	786
2010	539
2011	785
2012	945
2013	592
2014	851
2015	523
2016	947
2017	602
2018	394
2019	744
2020	1,010
2021	900
2022	834
2023	1,468
2024	707
2025	326

Download the Data

Data for records on 1999-10-20: 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 20	438
20 to 40	18
40 to 60	3
60 to 80	2
80 to 100	3
100 to 120	1
120 to 140	1