Weather Records on 20 September 1999

923 weather records were set or tied worldwide on 20 September 1999. Highest significance: Pte de la Hague, FR.

Key Facts for 20 September 1999

On 20 September 1999, 923 weather records were set or tied at long-record stations worldwide.
516 were record highs and 283 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 24 monthly and 899 daily.
Pte de la Hague set a daily record precipitation of 37.0 mm (1.5 in) on 20 September 1999.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 439 records.

Record Map

923 stations

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

Weather records on 20 September 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Pte de la Hague	France	Record daily precipitation	37.0 mm (1.5 in)	63 of 100 (Major)
Verona Villafranca	Italy	Record daily precipitation	55.6 mm (2.2 in)	55 of 100 (Notable)
Edisto Beach Sp	United States	Record daily precipitation	99.6 mm (3.9 in)	50 of 100 (Notable)
San Jose de Gracia	Mexico	Record daily precipitation	42.9 mm (1.7 in)	49 of 100 (Notable)
Dunbar	United Kingdom	Record daily precipitation	25.1 mm (1.0 in)	49 of 100 (Notable)
Galway	Ireland	Record daily precipitation	27.1 mm (1.1 in)	46 of 100 (Notable)
Lichtentanne	Germany	Record high maximum temperature	27.0 C (80.6 F)	46 of 100 (Notable)
Ardtalnaig	United Kingdom	Record daily precipitation	53.4 mm (2.1 in)	45 of 100 (Notable)
Sapelo Is	United States	Record daily precipitation	115.6 mm (4.6 in)	45 of 100 (Notable)
Lezay	France	Record daily precipitation	39.6 mm (1.6 in)	44 of 100 (Notable)
Balmoral	United Kingdom	Record daily precipitation	40.0 mm (1.6 in)	44 of 100 (Notable)
Kristianstad	Sweden	Record high minimum temperature	15.0 C (59.0 F)	43 of 100 (Notable)
Bordeaux-Merignac	France	Record daily precipitation	79.0 mm (3.1 in)	42 of 100 (Notable)
Milan	Italy	Record daily precipitation	31.0 mm (1.2 in)	42 of 100 (Notable)
Wetumpka	United States	Record daily precipitation	66.0 mm (2.6 in)	42 of 100 (Notable)
Paso Robles	United States	Record low maximum temperature	19.4 C (66.9 F)	42 of 100 (Notable)
Magdeburg	Germany	Record high minimum temperature	16.4 C (61.5 F)	41 of 100 (Notable)
Cottbus	Germany	Record high minimum temperature	18.0 C (64.4 F)	41 of 100 (Notable)
Anacortes	United States	Record high maximum temperature	27.2 C (81.0 F)	41 of 100 (Notable)
Ciudad Serdan (Smn)	Mexico	Record low minimum temperature	-2.2 C (28.0 F)	40 of 100 (Notable)
Americus	United States	Record low maximum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Hawkinsville	United States	Record low maximum temperature	21.1 C (70.0 F)	40 of 100 (Notable)
Mt Vernon	United States	Record daily precipitation	45.2 mm (1.8 in)	40 of 100 (Notable)
Pte de Chassiron	France	Record daily precipitation	30.6 mm (1.2 in)	37 of 100 (Notable)
Dublin	United States	Record low maximum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Madison	United States	Record daily precipitation	61.0 mm (2.4 in)	36 of 100 (Notable)
Kenton	United States	Record daily precipitation	38.1 mm (1.5 in)	36 of 100 (Notable)
San Saba	United States	Record high maximum temperature	36.1 C (97.0 F)	36 of 100 (Notable)
Dubois	United States	Record low maximum temperature	4.4 C (39.9 F)	36 of 100 (Notable)
Mount Gambier Post Office	Australia	Record low minimum temperature	1.9 C (35.4 F)	35 of 100 (Notable)
Tenosique (Smn)	Mexico	Record low minimum temperature	20.0 C (68.0 F)	35 of 100 (Notable)
Keflavik	Iceland	Record high maximum temperature	16.3 C (61.3 F)	34 of 100 (Routine)
Devils Garden	United States	Record daily precipitation	68.6 mm (2.7 in)	34 of 100 (Routine)
Cuthbert	United States	Record low maximum temperature	22.2 C (72.0 F)	34 of 100 (Routine)
Ajaccio	France	Record daily precipitation	46.4 mm (1.8 in)	33 of 100 (Routine)
Nalut	Libya	Record high maximum temperature	40.0 C (104.0 F)	33 of 100 (Routine)
Tepexpan	Mexico	Record high maximum temperature	32.8 C (91.0 F)	33 of 100 (Routine)
Birr	Ireland	Record daily precipitation	30.4 mm (1.2 in)	32 of 100 (Routine)
Bernburg/Saale (Nord)	Germany	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
Jerecuaro	Mexico	Record low minimum temperature	6.7 C (44.1 F)	32 of 100 (Routine)
Nahunta 6NE	United States	Record daily precipitation	47.0 mm (1.9 in)	32 of 100 (Routine)
Koebenhavn: Landbohojskolen-1	Denmark	Record high minimum temperature	15.8 C (60.4 F)	31 of 100 (Routine)
Hvar	Croatia	Record high minimum temperature	22.2 C (72.0 F)	31 of 100 (Routine)
Ulleungdo	Korea, South	Record daily precipitation	77.0 mm (3.0 in)	31 of 100 (Routine)
Zuara	Libya	Record high minimum temperature	27.0 C (80.6 F)	31 of 100 (Routine)
Presa Tezoyo	Mexico	Record low minimum temperature	0.0 C (32.0 F)	31 of 100 (Routine)
Peon Blanco	Mexico	Record low maximum temperature	13.9 C (57.0 F)	31 of 100 (Routine)
Torungen Fyr	Norway	Record high minimum temperature	14.9 C (58.8 F)	31 of 100 (Routine)
Oksoey Fyr	Norway	Record high minimum temperature	14.5 C (58.1 F)	31 of 100 (Routine)
Postojna	Slovenia	Record daily precipitation	60.0 mm (2.4 in)	31 of 100 (Routine)
Aiken 5SE	United States	Record low maximum temperature	21.7 C (71.1 F)	31 of 100 (Routine)
Blackville 3 W	United States	Record low maximum temperature	21.1 C (70.0 F)	31 of 100 (Routine)
Tranebjerg	Denmark	Record high minimum temperature	15.4 C (59.7 F)	30 of 100 (Routine)
Dzibalchen	Mexico	Record daily precipitation	75.4 mm (3.0 in)	30 of 100 (Routine)
San Martin Chalchicuautla	Mexico	Record low maximum temperature	18.9 C (66.0 F)	30 of 100 (Routine)
Ratece-Planica	Slovenia	Record daily precipitation	60.3 mm (2.4 in)	30 of 100 (Routine)
Braemar	United Kingdom	Record daily precipitation	69.6 mm (2.7 in)	30 of 100 (Routine)
Myakka Rvr Sp	United States	Record daily precipitation	86.9 mm (3.4 in)	30 of 100 (Routine)
Perry	United States	Record daily precipitation	36.6 mm (1.4 in)	30 of 100 (Routine)
Kenton	United States	Record low maximum temperature	11.7 C (53.1 F)	30 of 100 (Routine)

Counts by Type and Timescale

923 records

Records set or tied on 20 September 1999 by type: Highest daily maximum 192, Lowest daily maximum 141, Highest daily minimum 324, Lowest daily minimum 142, Heaviest daily rainfall 124.

Records on 20 September 1999 by type
Record type	Records
Highest daily maximum	192
Lowest daily maximum	141
Highest daily minimum	324
Lowest daily minimum	142
Heaviest daily rainfall	124
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1999 by timescale: all-time 0, monthly 24, daily 899.

How Much Records Were Beaten By

723 broken records

Margins by which the 723 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 104.7. Ties are not counted.

Top 20 by Significance

20 September 1999

Top 20 records on 20 September 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1999	Pte de la Hague, FR	daily rain	37.0 mm (1.5 in)	15.0 mm (0.6 in)	116 years	63 of 100 (Major)
20 September 1999	Verona Villafranca, IT	daily rain	55.6 mm (2.2 in)	50.8 mm (2.0 in)	38 years	55 of 100 (Notable)
20 September 1999	Edisto Beach Sp, US	daily rain	99.6 mm (3.9 in)	79.3 mm (3.1 in)	41 years	50 of 100 (Notable)
20 September 1999	San Jose de Gracia, MX	daily rain	42.9 mm (1.7 in)	40.6 mm (1.6 in)	36 years	49 of 100 (Notable)
20 September 1999	Dunbar, GB	daily rain	25.1 mm (1.0 in)	18.0 mm (0.7 in)	32 years	49 of 100 (Notable)
20 September 1999	Galway, IE	daily rain	27.1 mm (1.1 in)	4.2 mm (0.17 in)	97 years	46 of 100 (Notable)
20 September 1999	Lichtentanne, DE	daily high max	27.0 C (80.6 F)	3.0 C (5.4 F)	123 years	46 of 100 (Notable)
20 September 1999	Ardtalnaig, GB	daily rain	53.4 mm (2.1 in)	30.3 mm (1.2 in)	13 years	45 of 100 (Notable)
20 September 1999	Sapelo Is, US	daily rain	115.6 mm (4.6 in)	104.7 mm (4.1 in)	5 years	45 of 100 (Notable)
20 September 1999	Lezay, FR	daily rain	39.6 mm (1.6 in)	17.0 mm (0.7 in)	56 years	44 of 100 (Notable)
20 September 1999	Balmoral, GB	daily rain	40.0 mm (1.6 in)	23.2 mm (0.9 in)	13 years	44 of 100 (Notable)
20 September 1999	Kristianstad, SE	daily high min	15.0 C (59.0 F)	1.0 C (1.8 F)	105 years	43 of 100 (Notable)
20 September 1999	Bordeaux-Merignac, FR	monthly rain	79.0 mm (3.1 in)	20.0 mm (0.8 in)	2 years	42 of 100 (Notable)
20 September 1999	Milan, IT	daily rain	31.0 mm (1.2 in)	3.3 mm (0.13 in)	126 years	42 of 100 (Notable)
20 September 1999	Wetumpka, US	daily rain	66.0 mm (2.6 in)	39.8 mm (1.6 in)	45 years	42 of 100 (Notable)
20 September 1999	Paso Robles, US	daily low max	19.4 C (66.9 F)	1.2 C (2.2 F)	102 years	42 of 100 (Notable)
20 September 1999	Magdeburg, DE	daily high min	16.4 C (61.5 F)	0.5 C (0.9 F)	107 years	41 of 100 (Notable)
20 September 1999	Cottbus, DE	daily high min	18.0 C (64.4 F)	2.5 C (4.5 F)	81 years	41 of 100 (Notable)
20 September 1999	Anacortes, US	daily high max	27.2 C (81.0 F)	2.8 C (5.0 F)	77 years	41 of 100 (Notable)
20 September 1999	Ciudad Serdan (Smn), MX	monthly low min	-2.2 C (28.0 F)	2.2 C (4.0 F)	50 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

1812 to 1999

Records set or tied on this calendar date in each year from 1812 to 1999. 1999 had 923 records.

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

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 1999-09-20: 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 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 20	695
20 to 40	23
40 to 60	3
60 to 80	1
80 to 100	0
100 to 120	1