Weather Records on 23 September 1999

1,207 weather records were set or tied worldwide on 23 September 1999. Highest significance: Tenosique (Smn), MX.

Key Facts for 23 September 1999

On 23 September 1999, 1,207 weather records were set or tied at long-record stations worldwide.
545 were record highs and 475 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 26 monthly and 1,181 daily.
Tenosique (Smn) set a daily record low minimum temperature of 16.7 C (62.1 F) on 23 September 1999.
Across 169 earlier years (1793 to 2026) the same calendar date averaged 427 records.

Record Map

1,207 stations

1,207 station records on 23 September 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 23 September 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tenosique (Smn)	Mexico	Record low minimum temperature	16.7 C (62.1 F)	59 of 100 (Notable)
Marechal Floriano (Dnos)	Brazil	Record daily precipitation	72.0 mm (2.8 in)	51 of 100 (Notable)
Satenas	Sweden	Record daily precipitation	29.8 mm (1.2 in)	49 of 100 (Notable)
Fazenda Campo Grande	Brazil	Record daily precipitation	62.0 mm (2.4 in)	48 of 100 (Notable)
Mokpo	Korea, South	Record daily precipitation	130.0 mm (5.1 in)	48 of 100 (Notable)
Cordes	United States	Record daily precipitation	50.8 mm (2.0 in)	48 of 100 (Notable)
Ulleungdo	Korea, South	Record daily precipitation	96.0 mm (3.8 in)	47 of 100 (Notable)
Cuyamaca	United States	Record daily precipitation	47.2 mm (1.9 in)	47 of 100 (Notable)
Natchez	United States	Record low minimum temperature	6.1 C (43.0 F)	46 of 100 (Notable)
Dores Do Manhumirim	Brazil	Record daily precipitation	36.5 mm (1.4 in)	44 of 100 (Notable)
Adin Rs	United States	Record high minimum temperature	10.6 C (51.1 F)	44 of 100 (Notable)
Blackville 3 W	United States	Record low minimum temperature	3.3 C (37.9 F)	44 of 100 (Notable)
Wedgefield	United States	Record low minimum temperature	6.1 C (43.0 F)	44 of 100 (Notable)
Arace (Dnos)	Brazil	Record daily precipitation	32.0 mm (1.3 in)	43 of 100 (Notable)
Kirchdorf/Poel	Germany	Record high minimum temperature	14.5 C (58.1 F)	43 of 100 (Notable)
Kristianstad	Sweden	Record high maximum temperature	21.1 C (70.0 F)	43 of 100 (Notable)
Addison	United States	Record low maximum temperature	10.6 C (51.1 F)	43 of 100 (Notable)
Santa Rosa	Mexico	Record low minimum temperature	13.9 C (57.0 F)	42 of 100 (Notable)
Mtn Pass	United States	Record daily precipitation	40.4 mm (1.6 in)	42 of 100 (Notable)
Donaldsonville 4 SW	United States	Record low minimum temperature	9.4 C (48.9 F)	42 of 100 (Notable)
Yemassee 1 N	United States	Record low minimum temperature	3.9 C (39.0 F)	42 of 100 (Notable)
Covington 8 WNW	United States	Record low minimum temperature	6.7 C (44.1 F)	41 of 100 (Notable)
Saltville 1N	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Marlinton	United States	Record low maximum temperature	13.3 C (55.9 F)	41 of 100 (Notable)
La Vega	Mexico	Record low minimum temperature	10.6 C (51.1 F)	40 of 100 (Notable)
Nordkoster A	Sweden	Record daily precipitation	30.8 mm (1.2 in)	40 of 100 (Notable)
Wells	United States	Record high minimum temperature	12.8 C (55.0 F)	40 of 100 (Notable)
Hamburg Fuhlsbuettel	Germany	Record high minimum temperature	15.1 C (59.2 F)	39 of 100 (Notable)
Gyzylarbat	Turkmenistan	Record low maximum temperature	17.5 C (63.5 F)	39 of 100 (Notable)
Kalispell Glacier AP	United States	Record high maximum temperature	30.0 C (86.0 F)	39 of 100 (Notable)
Heppner	United States	Record high maximum temperature	32.8 C (91.0 F)	39 of 100 (Notable)
Walnut Grove	United States	Record daily precipitation	52.1 mm (2.1 in)	38 of 100 (Notable)
Marion	United States	Record low minimum temperature	-1.7 C (28.9 F)	38 of 100 (Notable)
Garrafao (Dnos)	Brazil	Record daily precipitation	39.3 mm (1.5 in)	37 of 100 (Notable)
Monticello	United States	Record low minimum temperature	5.6 C (42.1 F)	37 of 100 (Notable)
Kershaw 1SW	United States	Record low minimum temperature	3.9 C (39.0 F)	37 of 100 (Notable)
Sarpsborg	Norway	Record daily precipitation	28.0 mm (1.1 in)	36 of 100 (Notable)
Waynesboro 2 W	United States	Record low minimum temperature	3.9 C (39.0 F)	36 of 100 (Notable)
Lakeview	United States	Record high minimum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Greeneville Exp STN	United States	Record low minimum temperature	-2.2 C (28.0 F)	36 of 100 (Notable)
Louisville 1 E	United States	Record low minimum temperature	6.7 C (44.1 F)	35 of 100 (Notable)
Calhoun 2 N	United States	Record low minimum temperature	4.4 C (39.9 F)	35 of 100 (Notable)
Philippi	United States	Record low maximum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Amite	United States	Record low minimum temperature	6.1 C (43.0 F)	34 of 100 (Routine)
Saltville 1N	United States	Record low minimum temperature	0.6 C (33.1 F)	34 of 100 (Routine)
Bremen-Seefahrtschule	Germany	Record high minimum temperature	14.5 C (58.1 F)	33 of 100 (Routine)
Union de Tula	Mexico	Record low minimum temperature	10.6 C (51.1 F)	33 of 100 (Routine)
Faerder Fyr	Norway	Record daily precipitation	29.3 mm (1.2 in)	33 of 100 (Routine)
Talladega	United States	Record low minimum temperature	3.3 C (37.9 F)	33 of 100 (Routine)
Pilot Rock 1 SE	United States	Record high maximum temperature	33.3 C (91.9 F)	33 of 100 (Routine)
Neshaminy Falls	United States	Record low maximum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Lewisburg Exp STN	United States	Record low minimum temperature	0.6 C (33.1 F)	33 of 100 (Routine)
Quito	Mexico	Record low minimum temperature	13.9 C (57.0 F)	32 of 100 (Routine)
Huetamo	Mexico	Record low maximum temperature	28.9 C (84.0 F)	32 of 100 (Routine)
Santiago Undameo	Mexico	Record low minimum temperature	5.0 C (41.0 F)	32 of 100 (Routine)
Hawley 1 E	United States	Record low maximum temperature	10.0 C (50.0 F)	32 of 100 (Routine)
Tenango de Doria	Mexico	Record high maximum temperature	31.7 C (89.1 F)	31 of 100 (Routine)
Cuixtla	Mexico	Record low minimum temperature	12.8 C (55.0 F)	31 of 100 (Routine)
El Zapote	Mexico	Record high minimum temperature	27.2 C (81.0 F)	31 of 100 (Routine)
Hoburg	Sweden	Record high maximum temperature	19.2 C (66.6 F)	31 of 100 (Routine)

Counts by Type and Timescale

1,207 records

Records set or tied on 23 September 1999 by type: Highest daily maximum 178, Lowest daily maximum 102, Highest daily minimum 367, Lowest daily minimum 373, Heaviest daily rainfall 187.

Records on 23 September 1999 by type
Record type	Records
Highest daily maximum	178
Lowest daily maximum	102
Highest daily minimum	367
Lowest daily minimum	373
Heaviest daily rainfall	187
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 23 September 1999 by timescale: all-time 0, monthly 26, daily 1,181.

How Much Records Were Beaten By

911 broken records

Margins by which the 911 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 83.0. Ties are not counted.

Top 20 by Significance

23 September 1999

Top 20 records on 23 September 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 September 1999	Tenosique (Smn), MX	daily low min	16.7 C (62.1 F)	3.3 C (5.9 F)	77 years	59 of 100 (Notable)
23 September 1999	Marechal Floriano (Dnos), BR	daily rain	72.0 mm (2.8 in)	48.0 mm (1.9 in)	20 years	51 of 100 (Notable)
23 September 1999	Satenas, SE	daily rain	29.8 mm (1.2 in)	24.2 mm (1.0 in)	25 years	49 of 100 (Notable)
23 September 1999	Fazenda Campo Grande, BR	daily rain	62.0 mm (2.4 in)	39.2 mm (1.5 in)	36 years	48 of 100 (Notable)
23 September 1999	Mokpo, KR	daily rain	130.0 mm (5.1 in)	83.0 mm (3.3 in)	40 years	48 of 100 (Notable)
23 September 1999	Cordes, US	daily rain	50.8 mm (2.0 in)	32.0 mm (1.3 in)	56 years	48 of 100 (Notable)
23 September 1999	Ulleungdo, KR	daily rain	96.0 mm (3.8 in)	71.0 mm (2.8 in)	44 years	47 of 100 (Notable)
23 September 1999	Cuyamaca, US	daily rain	47.2 mm (1.9 in)	16.7 mm (0.7 in)	90 years	47 of 100 (Notable)
23 September 1999	Natchez, US	daily low min	6.1 C (43.0 F)	2.2 C (4.0 F)	101 years	46 of 100 (Notable)
23 September 1999	Dores Do Manhumirim, BR	daily rain	36.5 mm (1.4 in)	27.5 mm (1.1 in)	12 years	44 of 100 (Notable)
23 September 1999	Adin Rs, US	daily high min	10.6 C (51.1 F)	1.7 C (3.1 F)	104 years	44 of 100 (Notable)
23 September 1999	Blackville 3 W, US	daily low min	3.3 C (37.9 F)	3.4 C (6.1 F)	85 years	44 of 100 (Notable)
23 September 1999	Wedgefield, US	daily low min	6.1 C (43.0 F)	5.6 C (10.1 F)	72 years	44 of 100 (Notable)
23 September 1999	Arace (Dnos), BR	daily rain	32.0 mm (1.3 in)	23.0 mm (0.9 in)	30 years	43 of 100 (Notable)
23 September 1999	Kirchdorf/Poel, DE	daily high min	14.5 C (58.1 F)	0.9 C (1.6 F)	106 years	43 of 100 (Notable)
23 September 1999	Kristianstad, SE	daily high max	21.1 C (70.0 F)	1.1 C (2.0 F)	103 years	43 of 100 (Notable)
23 September 1999	Addison, US	daily low max	10.6 C (51.1 F)	1.6 C (2.9 F)	102 years	43 of 100 (Notable)
23 September 1999	Santa Rosa, MX	daily low min	13.9 C (57.0 F)	4.4 C (7.9 F)	16 years	42 of 100 (Notable)
23 September 1999	Mtn Pass, US	daily rain	40.4 mm (1.6 in)	37.9 mm (1.5 in)	6 years	42 of 100 (Notable)
23 September 1999	Donaldsonville 4 SW, US	daily low min	9.4 C (48.9 F)	1.2 C (2.2 F)	99 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 1,207 records.

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

Records on 09-23 in each year
Year	Records
1793	1
1796	1
1799	1
1804	1
1832	1
1835	1
1838	1
1842	3
1843	1
1845	2
1848	1
1849	1
1850	1
1851	2
1854	3
1855	1
1859	2
1864	1
1865	1
1866	1
1868	1
1871	1
1872	1
1874	1
1875	1
1876	1
1877	1
1881	4
1882	2
1885	1
1886	1
1887	1
1888	1
1889	3
1890	2
1891	1
1892	2
1893	4
1895	9
1896	5
1897	1
1898	2
1899	4
1900	4
1901	2
1902	6
1903	7
1904	19
1905	6
1906	6
1907	19
1908	19
1909	15
1910	8
1911	11
1912	15
1913	22
1914	29
1915	25
1916	324
1917	56
1918	34
1919	40
1920	44
1921	47
1922	34
1923	74
1924	194
1925	223
1926	459
1927	247
1928	382
1929	198
1930	472
1931	600
1932	383
1933	281
1934	361
1935	239
1936	377
1937	557
1938	389
1939	279
1940	374
1941	490
1942	557
1943	322
1944	381
1945	652
1946	623
1947	803
1948	259
1949	496
1950	267
1951	462
1952	432
1953	271
1954	324
1955	852
1956	299
1957	539
1958	641
1959	307
1960	470
1961	670
1962	344
1963	568
1964	322
1965	783
1966	528
1967	341
1968	481
1969	450
1970	1,457
1971	578
1972	461
1973	674
1974	1,543
1975	1,038
1976	463
1977	616
1978	500
1979	586
1980	1,037
1981	717
1982	775
1983	1,744
1984	1,121
1985	924
1986	740
1987	1,077
1988	653
1989	1,376
1990	702
1991	519
1992	976
1993	983
1994	1,140
1995	1,868
1996	809
1997	1,060
1998	1,326
1999	1,207
2000	2,026
2001	790
2002	930
2003	1,243
2004	986
2005	1,207
2006	1,509
2007	1,153
2008	835
2009	1,201
2010	1,360
2011	666
2012	785
2013	573
2014	595
2015	587
2016	774
2017	1,371
2018	693
2019	565
2020	618
2021	602
2022	551
2023	812
2024	499
2025	449
2026	384

Download the Data

Data for records on 1999-09-23: 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	894
20 to 40	14
40 to 60	1
60 to 80	1
80 to 100	1