Weather Records on 15 September 1999

858 weather records were set or tied worldwide on 15 September 1999. Highest significance: Wilmington Intl AP, US.

Key Facts for 15 September 1999

On 15 September 1999, 858 weather records were set or tied at long-record stations worldwide.
339 were record highs and 310 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 20 monthly and 834 daily.
Wilmington Intl AP set an all-time record daily precipitation of 339.9 mm (13.4 in) on 15 September 1999.
Across 170 earlier years (1797 to 2026) the same calendar date averaged 410 records.

Record Map

858 stations

858 station records on 15 September 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 September 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Wilmington Intl AP	United States	Record daily precipitation	339.9 mm (13.4 in)	77 of 100 (Major)
Rocky Mt	United States	Record daily precipitation	157.2 mm (6.2 in)	73 of 100 (Major)
Suffolk Lake Kilby	United States	Record daily precipitation	233.4 mm (9.2 in)	67 of 100 (Major)
McClellanville	United States	Record daily precipitation	260.6 mm (10.3 in)	62 of 100 (Major)
Bastia	France	Record daily precipitation	110.8 mm (4.4 in)	60 of 100 (Major)
Jerome	United States	Record daily precipitation	46.0 mm (1.8 in)	59 of 100 (Notable)
Wilmington 7 N	United States	Record daily precipitation	132.6 mm (5.2 in)	59 of 100 (Notable)
Florence Rgnl AP	United States	Record daily precipitation	94.5 mm (3.7 in)	57 of 100 (Notable)
Kingstree	United States	Record daily precipitation	134.6 mm (5.3 in)	56 of 100 (Notable)
Southport 5 N	United States	Record daily precipitation	146.3 mm (5.8 in)	54 of 100 (Notable)
Lawrenceville 3 E	United States	Record daily precipitation	156.0 mm (6.1 in)	54 of 100 (Notable)
Sanford	United States	Record daily precipitation	94.0 mm (3.7 in)	53 of 100 (Notable)
Lingen	Germany	Record daily precipitation	49.6 mm (2.0 in)	52 of 100 (Notable)
Prescott	United States	Record daily precipitation	27.9 mm (1.1 in)	52 of 100 (Notable)
Walterboro 1 SW	United States	Record daily precipitation	63.8 mm (2.5 in)	51 of 100 (Notable)
Tenosique (Smn)	Mexico	Record low minimum temperature	17.8 C (64.0 F)	49 of 100 (Notable)
Red Springs 1 SE	United States	Record daily precipitation	157.5 mm (6.2 in)	49 of 100 (Notable)
Fuzhou	China	Record daily precipitation	106.7 mm (4.2 in)	48 of 100 (Notable)
Pleasant Valley	United States	Record daily precipitation	44.2 mm (1.7 in)	47 of 100 (Notable)
Walnut Canyon Nm	United States	Record daily precipitation	40.6 mm (1.6 in)	47 of 100 (Notable)
Loris 2 S	United States	Record daily precipitation	105.7 mm (4.2 in)	47 of 100 (Notable)
Hereford	United States	Record daily precipitation	82.8 mm (3.3 in)	47 of 100 (Notable)
Melbourne Regional Office	Australia	Record high minimum temperature	14.1 C (57.4 F)	46 of 100 (Notable)
Chino Valley	United States	Record daily precipitation	41.4 mm (1.6 in)	44 of 100 (Notable)
Trenton	United States	Record daily precipitation	94.2 mm (3.7 in)	44 of 100 (Notable)
Holly Hill	United States	Record daily precipitation	83.8 mm (3.3 in)	43 of 100 (Notable)
Boulia Airport	Australia	Record high maximum temperature	39.0 C (102.2 F)	42 of 100 (Notable)
Brocken	Germany	Record high maximum temperature	21.7 C (71.1 F)	42 of 100 (Notable)
Seligman	United States	Record daily precipitation	36.8 mm (1.4 in)	42 of 100 (Notable)
Annapolis Police Brks	United States	Record daily precipitation	52.3 mm (2.1 in)	41 of 100 (Notable)
Clovis 13 N	United States	Record daily precipitation	52.1 mm (2.1 in)	41 of 100 (Notable)
Reading Wb City	United States	Record daily precipitation	37.1 mm (1.5 in)	40 of 100 (Notable)
Zweelo	Netherlands	Record daily precipitation	45.5 mm (1.8 in)	39 of 100 (Notable)
Gisela	United States	Record daily precipitation	45.7 mm (1.8 in)	38 of 100 (Notable)
Asheboro 2 W	United States	Record daily precipitation	54.4 mm (2.1 in)	38 of 100 (Notable)
Canadian	United States	Record low maximum temperature	16.7 C (62.1 F)	38 of 100 (Notable)
Langley AFB	United States	Record daily precipitation	154.9 mm (6.1 in)	37 of 100 (Notable)
Oksoey Fyr	Norway	Record high minimum temperature	14.9 C (58.8 F)	36 of 100 (Notable)
Skovorodino	Russia	Record low maximum temperature	5.2 C (41.4 F)	36 of 100 (Notable)
Khlong Yai	Thailand	Record high minimum temperature	27.2 C (81.0 F)	36 of 100 (Notable)
Manassa	United States	Record low maximum temperature	15.0 C (59.0 F)	36 of 100 (Notable)
Winslow AP	United States	Record low maximum temperature	22.2 C (72.0 F)	36 of 100 (Notable)
New Bern - ASOS	United States	Record daily precipitation	103.9 mm (4.1 in)	36 of 100 (Notable)
Blue Ridge Rs	United States	Record daily precipitation	40.6 mm (1.6 in)	35 of 100 (Notable)
Hamlet	United States	Record daily precipitation	45.5 mm (1.8 in)	35 of 100 (Notable)
Winston Salem Reynolds AP	United States	Record daily precipitation	27.7 mm (1.1 in)	35 of 100 (Notable)
Assateague	United States	Record daily precipitation	48.5 mm (1.9 in)	34 of 100 (Routine)
Greensboro AP	United States	Record daily precipitation	49.3 mm (1.9 in)	34 of 100 (Routine)
Lewiston	United States	Record daily precipitation	156.2 mm (6.1 in)	32 of 100 (Routine)
Georgetown 2 E	United States	Record daily precipitation	49.5 mm (1.9 in)	32 of 100 (Routine)
Atlantic City Marina	United States	Record daily precipitation	25.1 mm (1.0 in)	32 of 100 (Routine)
Charleston Intl AP	United States	Record daily precipitation	99.6 mm (3.9 in)	32 of 100 (Routine)
Miami Beach	United States	Record high maximum temperature	33.9 C (93.0 F)	32 of 100 (Routine)
Wallops Is Nasa Test Facility	United States	Record daily precipitation	56.4 mm (2.2 in)	32 of 100 (Routine)
Onnen	Netherlands	Record daily precipitation	47.1 mm (1.9 in)	31 of 100 (Routine)
Heber (Black Mesa) Rs	United States	Record daily precipitation	31.8 mm (1.3 in)	31 of 100 (Routine)
Waychinicup Downs	Australia	Record daily precipitation	26.0 mm (1.0 in)	30 of 100 (Routine)
Enschede	Netherlands	Record daily precipitation	33.7 mm (1.3 in)	30 of 100 (Routine)
Alpine	United States	Record low maximum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Appomattox	United States	Record daily precipitation	52.1 mm (2.1 in)	30 of 100 (Routine)

Counts by Type and Timescale

858 records

Records set or tied on 15 September 1999 by type: Highest daily maximum 200, Lowest daily maximum 153, Highest daily minimum 139, Lowest daily minimum 157, Heaviest daily rainfall 209.

Records on 15 September 1999 by type
Record type	Records
Highest daily maximum	200
Lowest daily maximum	153
Highest daily minimum	139
Lowest daily minimum	157
Heaviest daily rainfall	209
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 September 1999 by timescale: all-time 4, monthly 20, daily 834.

How Much Records Were Beaten By

691 broken records

Margins by which the 691 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 149.7. Ties are not counted.

Top 20 by Significance

15 September 1999

Top 20 records on 15 September 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 September 1999	Wilmington Intl AP, US	all-time rain	339.9 mm (13.4 in)	149.7 mm (5.9 in)	40 years	77 of 100 (Major)
15 September 1999	Rocky Mt, US	daily rain	157.2 mm (6.2 in)	106.4 mm (4.2 in)	81 years	73 of 100 (Major)
15 September 1999	Suffolk Lake Kilby, US	all-time rain	233.4 mm (9.2 in)	74.6 mm (2.9 in)	17 years	67 of 100 (Major)
15 September 1999	McClellanville, US	all-time rain	260.6 mm (10.3 in)	71.4 mm (2.8 in)	8 years	62 of 100 (Major)
15 September 1999	Bastia, FR	daily rain	110.8 mm (4.4 in)	90.7 mm (3.6 in)	50 years	60 of 100 (Major)
15 September 1999	Jerome, US	daily rain	46.0 mm (1.8 in)	25.2 mm (1.0 in)	85 years	59 of 100 (Notable)
15 September 1999	Wilmington 7 N, US	daily rain	132.6 mm (5.2 in)	108.2 mm (4.3 in)	48 years	59 of 100 (Notable)
15 September 1999	Florence Rgnl AP, US	daily rain	94.5 mm (3.7 in)	72.9 mm (2.9 in)	40 years	57 of 100 (Notable)
15 September 1999	Kingstree, US	daily rain	134.6 mm (5.3 in)	55.9 mm (2.2 in)	66 years	56 of 100 (Notable)
15 September 1999	Southport 5 N, US	daily rain	146.3 mm (5.8 in)	58.9 mm (2.3 in)	81 years	54 of 100 (Notable)
15 September 1999	Lawrenceville 3 E, US	daily rain	156.0 mm (6.1 in)	71.7 mm (2.8 in)	22 years	54 of 100 (Notable)
15 September 1999	Sanford, US	daily rain	94.0 mm (3.7 in)	65.3 mm (2.6 in)	40 years	53 of 100 (Notable)
15 September 1999	Lingen, DE	daily rain	49.6 mm (2.0 in)	22.6 mm (0.9 in)	30 years	52 of 100 (Notable)
15 September 1999	Prescott, US	daily rain	27.9 mm (1.1 in)	14.7 mm (0.6 in)	96 years	52 of 100 (Notable)
15 September 1999	Walterboro 1 SW, US	daily rain	63.8 mm (2.5 in)	29.8 mm (1.2 in)	96 years	51 of 100 (Notable)
15 September 1999	Tenosique (Smn), MX	daily low min	17.8 C (64.0 F)	2.2 C (4.0 F)	77 years	49 of 100 (Notable)
15 September 1999	Red Springs 1 SE, US	daily rain	157.5 mm (6.2 in)	118.6 mm (4.7 in)	1 year	49 of 100 (Notable)
15 September 1999	Fuzhou, CN	daily rain	106.7 mm (4.2 in)	75.1 mm (3.0 in)	38 years	48 of 100 (Notable)
15 September 1999	Pleasant Valley, US	daily rain	44.2 mm (1.7 in)	36.3 mm (1.4 in)	34 years	47 of 100 (Notable)
15 September 1999	Walnut Canyon Nm, US	daily rain	40.6 mm (1.6 in)	32.2 mm (1.3 in)	2 years	47 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

1797 to 1999

Records set or tied on this calendar date in each year from 1797 to 1999. 1999 had 858 records.

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

Records on 09-15 in each year
Year	Records
1797	1
1803	1
1806	2
1810	1
1816	1
1818	1
1823	2
1833	1
1836	1
1837	2
1839	1
1841	1
1848	1
1850	1
1851	1
1854	2
1856	1
1857	1
1859	1
1864	1
1865	2
1866	1
1867	2
1868	1
1869	1
1872	1
1873	2
1876	2
1877	2
1880	1
1881	1
1882	6
1884	3
1885	4
1886	2
1887	3
1888	1
1889	5
1890	1
1894	4
1895	1
1897	1
1898	3
1899	3
1900	1
1901	12
1902	7
1903	31
1904	30
1905	16
1906	6
1907	7
1908	16
1909	16
1910	2
1911	40
1912	64
1913	43
1914	18
1915	94
1916	44
1917	50
1918	50
1919	52
1920	164
1921	122
1922	53
1923	193
1924	103
1925	112
1926	134
1927	539
1928	86
1929	99
1930	235
1931	422
1932	295
1933	322
1934	351
1935	463
1936	460
1937	337
1938	247
1939	1,098
1940	181
1941	276
1942	278
1943	360
1944	396
1945	418
1946	411
1947	621
1948	557
1949	523
1950	750
1951	283
1952	455
1953	400
1954	518
1955	532
1956	646
1957	449
1958	294
1959	844
1960	410
1961	586
1962	557
1963	455
1964	839
1965	614
1966	534
1967	578
1968	429
1969	362
1970	1,157
1971	598
1972	356
1973	774
1974	386
1975	739
1976	667
1977	400
1978	628
1979	1,022
1980	563
1981	613
1982	1,315
1983	756
1984	766
1985	764
1986	928
1987	719
1988	818
1989	955
1990	911
1991	1,165
1992	919
1993	2,227
1994	1,363
1995	723
1996	1,212
1997	1,177
1998	1,768
1999	858
2000	1,175
2001	837
2002	1,212
2003	855
2004	893
2005	1,123
2006	1,042
2007	946
2008	1,153
2009	773
2010	913
2011	1,170
2012	568
2013	854
2014	443
2015	997
2016	988
2017	825
2018	874
2019	538
2020	785
2021	467
2022	392
2023	507
2024	681
2025	503
2026	779

Download the Data

Data for records on 1999-09-15: 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	648
20 to 40	20
40 to 60	9
60 to 80	8
80 to 100	2
100 to 120	3
120 to 140	0
140 to 160	1