Weather Records on 11 September 1999

1,073 weather records were set or tied worldwide on 11 September 1999. Highest significance: Moosehead, US.

Key Facts for 11 September 1999

On 11 September 1999, 1,073 weather records were set or tied at long-record stations worldwide.
622 were record highs and 165 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 48 monthly and 1,023 daily.
Moosehead set a daily record precipitation of 89.2 mm (3.5 in) on 11 September 1999.
Across 164 earlier years (1809 to 2026) the same calendar date averaged 420 records.

Record Map

1,073 stations

1,073 station records on 11 September 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 September 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Moosehead	United States	Record daily precipitation	89.2 mm (3.5 in)	65 of 100 (Major)
Mobridge 2NNW	United States	Record daily precipitation	41.4 mm (1.6 in)	63 of 100 (Major)
Presque Isle	United States	Record daily precipitation	71.1 mm (2.8 in)	61 of 100 (Major)
Cape Naturaliste	Australia	Record daily precipitation	42.0 mm (1.7 in)	60 of 100 (Major)
Millinocket	United States	Record daily precipitation	59.7 mm (2.4 in)	57 of 100 (Notable)
Franklin	United States	Record daily precipitation	109.2 mm (4.3 in)	56 of 100 (Notable)
Milford	United States	Record daily precipitation	117.6 mm (4.6 in)	56 of 100 (Notable)
Newburyport	United States	Record daily precipitation	102.9 mm (4.1 in)	56 of 100 (Notable)
Fitzwilliam 2 W	United States	Record daily precipitation	74.9 mm (2.9 in)	56 of 100 (Notable)
Ft Kent	United States	Record daily precipitation	67.3 mm (2.6 in)	55 of 100 (Notable)
Seligman	United States	Record daily precipitation	58.9 mm (2.3 in)	54 of 100 (Notable)
Liberal	United States	Record daily precipitation	55.4 mm (2.2 in)	54 of 100 (Notable)
Lakeport 2	United States	Record daily precipitation	94.7 mm (3.7 in)	53 of 100 (Notable)
Greenport Pwr House	United States	Record daily precipitation	85.1 mm (3.4 in)	53 of 100 (Notable)
Pinjarra	Australia	Record daily precipitation	37.6 mm (1.5 in)	52 of 100 (Notable)
Newcastle	United States	Record daily precipitation	85.1 mm (3.4 in)	52 of 100 (Notable)
Hardwick	United States	Record daily precipitation	70.1 mm (2.8 in)	52 of 100 (Notable)
Jamaica Plain	United States	Record daily precipitation	104.6 mm (4.1 in)	52 of 100 (Notable)
Yanchep	Australia	Record daily precipitation	39.2 mm (1.5 in)	51 of 100 (Notable)
Middleboro	United States	Record daily precipitation	44.5 mm (1.8 in)	51 of 100 (Notable)
Izevsk	Russia	Record daily precipitation	46.7 mm (1.8 in)	50 of 100 (Notable)
Belchertown	United States	Record daily precipitation	61.5 mm (2.4 in)	50 of 100 (Notable)
Dwellingup	Australia	Record daily precipitation	51.0 mm (2.0 in)	49 of 100 (Notable)
Newport	United States	Record daily precipitation	48.0 mm (1.9 in)	49 of 100 (Notable)
Brassua Dam	United States	Record daily precipitation	106.9 mm (4.2 in)	48 of 100 (Notable)
Long Falls Dam	United States	Record daily precipitation	55.6 mm (2.2 in)	48 of 100 (Notable)
Tully Lake	United States	Record daily precipitation	57.9 mm (2.3 in)	48 of 100 (Notable)
Bristow	United States	Record daily precipitation	80.0 mm (3.1 in)	48 of 100 (Notable)
Kalinga Bowls Club	Australia	Record daily precipitation	40.0 mm (1.6 in)	47 of 100 (Notable)
Middleton	United States	Record daily precipitation	68.6 mm (2.7 in)	47 of 100 (Notable)
Eureka	United States	Record daily precipitation	33.3 mm (1.3 in)	47 of 100 (Notable)
Ipswich	United States	Record daily precipitation	30.5 mm (1.2 in)	47 of 100 (Notable)
Barre Falls Dam	United States	Record daily precipitation	72.6 mm (2.9 in)	46 of 100 (Notable)
McCamey	United States	Record daily precipitation	45.7 mm (1.8 in)	45 of 100 (Notable)
Vestervig	Denmark	Record high maximum temperature	25.1 C (77.2 F)	44 of 100 (Notable)
Bridgton 3 NW	United States	Record daily precipitation	89.9 mm (3.5 in)	44 of 100 (Notable)
Pauls Valley 4 WSW	United States	Record daily precipitation	86.4 mm (3.4 in)	44 of 100 (Notable)
Halmstad	Sweden	Record high maximum temperature	23.0 C (73.4 F)	43 of 100 (Notable)
Oxford	United Kingdom	Record high minimum temperature	18.0 C (64.4 F)	43 of 100 (Notable)
Belfast	United States	Record daily precipitation	51.8 mm (2.0 in)	43 of 100 (Notable)
Buffumville Lake	United States	Record daily precipitation	64.0 mm (2.5 in)	43 of 100 (Notable)
E Wareham	United States	Record daily precipitation	64.5 mm (2.5 in)	43 of 100 (Notable)
Maynard 2	United States	Record daily precipitation	97.8 mm (3.9 in)	43 of 100 (Notable)
Timber Lake	United States	Record daily precipitation	33.3 mm (1.3 in)	43 of 100 (Notable)
West Medway	United States	Record daily precipitation	147.6 mm (5.8 in)	42 of 100 (Notable)
Lake Preston Lodge 2 Comp.	Australia	Record daily precipitation	35.0 mm (1.4 in)	41 of 100 (Notable)
Ware	United States	Record daily precipitation	52.1 mm (2.1 in)	41 of 100 (Notable)
Nashua 2 NNW	United States	Record daily precipitation	66.5 mm (2.6 in)	41 of 100 (Notable)
Gingin	Australia	Record daily precipitation	44.0 mm (1.7 in)	40 of 100 (Notable)
Dublin Phoenix Park	Ireland	Record high minimum temperature	15.2 C (59.4 F)	40 of 100 (Notable)
Den Helder-1	Netherlands	Record high maximum temperature	28.5 C (83.3 F)	40 of 100 (Notable)
Manston	United Kingdom	Record high maximum temperature	28.4 C (83.1 F)	40 of 100 (Notable)
Grafton	United States	Record daily precipitation	64.8 mm (2.6 in)	40 of 100 (Notable)
Lancaster	United States	Record daily precipitation	54.4 mm (2.1 in)	40 of 100 (Notable)
Nhill	Australia	Record low minimum temperature	-1.6 C (29.1 F)	39 of 100 (Notable)
Chilapa (Smn)	Mexico	Record daily precipitation	80.8 mm (3.2 in)	39 of 100 (Notable)
West Souburg	Netherlands	Record high minimum temperature	18.8 C (65.8 F)	39 of 100 (Notable)
Berlin	United States	Record daily precipitation	56.9 mm (2.2 in)	39 of 100 (Notable)
Selby	United States	Record daily precipitation	30.5 mm (1.2 in)	39 of 100 (Notable)
Aparri	Philippines	Record daily precipitation	118.0 mm (4.6 in)	38 of 100 (Notable)

Counts by Type and Timescale

1,073 records

Records set or tied on 11 September 1999 by type: Highest daily maximum 363, Lowest daily maximum 53, Highest daily minimum 259, Lowest daily minimum 112, Heaviest daily rainfall 286.

Records on 11 September 1999 by type
Record type	Records
Highest daily maximum	363
Lowest daily maximum	53
Highest daily minimum	259
Lowest daily minimum	112
Heaviest daily rainfall	286
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 September 1999 by timescale: all-time 2, monthly 48, daily 1,023.

How Much Records Were Beaten By

887 broken records

Margins by which the 887 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 97.8. Ties are not counted.

Top 20 by Significance

11 September 1999

Top 20 records on 11 September 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 September 1999	Moosehead, US	daily rain	89.2 mm (3.5 in)	61.0 mm (2.4 in)	60 years	65 of 100 (Major)
11 September 1999	Mobridge 2NNW, US	daily rain	41.4 mm (1.6 in)	30.5 mm (1.2 in)	66 years	63 of 100 (Major)
11 September 1999	Presque Isle, US	daily rain	71.1 mm (2.8 in)	34.5 mm (1.4 in)	60 years	61 of 100 (Major)
11 September 1999	Cape Naturaliste, AU	daily rain	42.0 mm (1.7 in)	20.9 mm (0.8 in)	44 years	60 of 100 (Major)
11 September 1999	Millinocket, US	daily rain	59.7 mm (2.4 in)	38.1 mm (1.5 in)	61 years	57 of 100 (Notable)
11 September 1999	Franklin, US	daily rain	109.2 mm (4.3 in)	83.5 mm (3.3 in)	30 years	56 of 100 (Notable)
11 September 1999	Milford, US	daily rain	117.6 mm (4.6 in)	97.8 mm (3.9 in)	22 years	56 of 100 (Notable)
11 September 1999	Newburyport, US	daily rain	102.9 mm (4.1 in)	74.2 mm (2.9 in)	22 years	56 of 100 (Notable)
11 September 1999	Fitzwilliam 2 W, US	daily rain	74.9 mm (2.9 in)	50.3 mm (2.0 in)	44 years	56 of 100 (Notable)
11 September 1999	Ft Kent, US	daily rain	67.3 mm (2.6 in)	32.5 mm (1.3 in)	44 years	55 of 100 (Notable)
11 September 1999	Seligman, US	daily rain	58.9 mm (2.3 in)	45.4 mm (1.8 in)	16 years	54 of 100 (Notable)
11 September 1999	Liberal, US	daily rain	55.4 mm (2.2 in)	22.4 mm (0.9 in)	86 years	54 of 100 (Notable)
11 September 1999	Lakeport 2, US	daily rain	94.7 mm (3.7 in)	62.2 mm (2.4 in)	22 years	53 of 100 (Notable)
11 September 1999	Greenport Pwr House, US	daily rain	85.1 mm (3.4 in)	57.7 mm (2.3 in)	30 years	53 of 100 (Notable)
11 September 1999	Pinjarra, AU	daily rain	37.6 mm (1.5 in)	14.2 mm (0.6 in)	81 years	52 of 100 (Notable)
11 September 1999	Newcastle, US	daily rain	85.1 mm (3.4 in)	71.6 mm (2.8 in)	30 years	52 of 100 (Notable)
11 September 1999	Hardwick, US	daily rain	70.1 mm (2.8 in)	38.6 mm (1.5 in)	72 years	52 of 100 (Notable)
11 September 1999	Jamaica Plain, US	daily rain	104.6 mm (4.1 in)	87.3 mm (3.4 in)	30 years	52 of 100 (Notable)
11 September 1999	Yanchep, AU	daily rain	39.2 mm (1.5 in)	18.1 mm (0.7 in)	64 years	51 of 100 (Notable)
11 September 1999	Middleboro, US	daily rain	44.5 mm (1.8 in)	20.4 mm (0.8 in)	99 years	51 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

1809 to 1999

Records set or tied on this calendar date in each year from 1809 to 1999. 1999 had 1,073 records.

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

Records on 09-11 in each year
Year	Records
1809	1
1814	3
1818	1
1830	1
1836	1
1838	3
1839	1
1848	1
1850	1
1851	1
1854	2
1858	1
1860	2
1861	1
1863	2
1865	3
1866	1
1874	2
1876	1
1877	1
1879	1
1880	1
1882	4
1883	2
1884	1
1886	1
1888	2
1889	4
1890	2
1891	2
1892	1
1893	4
1894	2
1895	4
1896	1
1897	3
1898	3
1899	5
1900	1
1901	3
1902	15
1903	13
1904	4
1905	5
1906	10
1907	9
1908	20
1909	12
1910	19
1911	9
1912	25
1913	22
1914	52
1915	160
1916	17
1917	88
1918	62
1919	52
1920	158
1921	52
1922	78
1923	44
1924	290
1925	260
1926	137
1927	300
1928	127
1929	206
1930	136
1931	868
1932	210
1933	276
1934	144
1935	410
1936	567
1937	324
1938	288
1939	561
1940	891
1941	210
1942	234
1943	335
1944	446
1945	341
1946	262
1947	611
1948	424
1949	450
1950	462
1951	247
1952	549
1953	392
1954	363
1955	479
1956	539
1957	470
1958	748
1959	488
1960	423
1961	524
1962	480
1963	359
1964	1,195
1965	414
1966	392
1967	478
1968	835
1969	685
1970	474
1971	464
1972	507
1973	612
1974	430
1975	644
1976	920
1977	406
1978	911
1979	596
1980	474
1981	347
1982	862
1983	1,243
1984	888
1985	844
1986	1,221
1987	595
1988	1,019
1989	1,301
1990	840
1991	843
1992	672
1993	809
1994	713
1995	619
1996	1,030
1997	808
1998	1,821
1999	1,073
2000	1,469
2001	826
2002	1,059
2003	1,022
2004	740
2005	1,163
2006	1,132
2007	947
2008	916
2009	774
2010	965
2011	1,051
2012	687
2013	1,207
2014	1,100
2015	683
2016	677
2017	916
2018	763
2019	806
2020	1,235
2021	851
2022	617
2023	1,034
2024	889
2025	917
2026	615

Download the Data

Data for records on 1999-09-11: 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	817
20 to 40	50
40 to 60	12
60 to 80	5
80 to 100	3