Weather Records on 11 September 1987

595 weather records were set or tied worldwide on 11 September 1987. Highest significance: Aparan, AM.

Key Facts for 11 September 1987

On 11 September 1987, 595 weather records were set or tied at long-record stations worldwide.
214 were record highs and 137 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 19 monthly and 574 daily.
Aparan set a daily record precipitation of 41.7 mm (1.6 in) on 11 September 1987.
Across 164 earlier years (1809 to 2026) the same calendar date averaged 422 records.

Record Map

595 stations

595 station records on 11 September 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 September 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Aparan	Armenia	Record daily precipitation	41.7 mm (1.6 in)	52 of 100 (Notable)
Oestersund-Froesoen	Sweden	Record daily precipitation	37.1 mm (1.5 in)	50 of 100 (Notable)
Santa Cruz Das Palmeiras	Brazil	Record daily precipitation	52.6 mm (2.1 in)	49 of 100 (Notable)
Kilauea 1134	United States	Record daily precipitation	46.5 mm (1.8 in)	47 of 100 (Notable)
Guaicara	Brazil	Record daily precipitation	56.4 mm (2.2 in)	46 of 100 (Notable)
Krasnyj Kut	Russia	Record daily precipitation	26.9 mm (1.1 in)	46 of 100 (Notable)
Marlinton	United States	Record daily precipitation	35.1 mm (1.4 in)	46 of 100 (Notable)
Hawaii Vol Np HQ 54	United States	Record daily precipitation	39.4 mm (1.6 in)	46 of 100 (Notable)
Kroksjo	Sweden	Record daily precipitation	38.0 mm (1.5 in)	45 of 100 (Notable)
Honolulu Intl AP	United States	Record daily precipitation	26.4 mm (1.0 in)	43 of 100 (Notable)
Dutch Harbor	United States	Record low minimum temperature	0.6 C (33.1 F)	41 of 100 (Notable)
Meridian Key Fld	United States	Record daily precipitation	55.4 mm (2.2 in)	39 of 100 (Notable)
Lagoa Branca	Brazil	Record daily precipitation	35.5 mm (1.4 in)	38 of 100 (Notable)
Vallbo	Sweden	Record daily precipitation	25.5 mm (1.0 in)	38 of 100 (Notable)
Capivari	Brazil	Record daily precipitation	41.6 mm (1.6 in)	37 of 100 (Notable)
Guantanamo Bay NAS	Cuba	Record high minimum temperature	27.2 C (81.0 F)	37 of 100 (Notable)
Munsvattnet	Sweden	Record daily precipitation	29.3 mm (1.2 in)	37 of 100 (Notable)
Patterson	United States	Record daily precipitation	63.2 mm (2.5 in)	37 of 100 (Notable)
Princeville Rch 1117	United States	Record daily precipitation	47.0 mm (1.9 in)	37 of 100 (Notable)
Guaxupe Aneel/Cesp	Brazil	Record daily precipitation	36.5 mm (1.4 in)	36 of 100 (Notable)
Stephan 2 NW	United States	Record low maximum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Indaiatuba	Brazil	Record daily precipitation	39.6 mm (1.6 in)	34 of 100 (Routine)
Coloso	Puerto Rico [United States]	Record daily precipitation	77.5 mm (3.1 in)	34 of 100 (Routine)
Ulan-Ude	Russia	Record high minimum temperature	11.0 C (51.8 F)	33 of 100 (Routine)
Hangzhou	China	Record daily precipitation	81.7 mm (3.2 in)	32 of 100 (Routine)
Cuernavaca (Dge)	Mexico	Record high minimum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Arkabutla Dam	United States	Record daily precipitation	48.3 mm (1.9 in)	32 of 100 (Routine)
Van Vleet	United States	Record daily precipitation	100.1 mm (3.9 in)	32 of 100 (Routine)
Southport 5 N	United States	Record low maximum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Warragul	Australia	Record daily precipitation	41.3 mm (1.6 in)	31 of 100 (Routine)
Elias Fausto	Brazil	Record daily precipitation	37.4 mm (1.5 in)	31 of 100 (Routine)
Willard 4 SW	United States	Record high minimum temperature	25.6 C (78.1 F)	31 of 100 (Routine)
Lindoia	Brazil	Record daily precipitation	31.4 mm (1.2 in)	30 of 100 (Routine)
Chuuk WSO AP	Federated States of Micronesia	Record high minimum temperature	26.7 C (80.1 F)	30 of 100 (Routine)
Palo Verde	Mexico	Record high maximum temperature	30.6 C (87.1 F)	30 of 100 (Routine)
Longview	United States	Record daily precipitation	46.5 mm (1.8 in)	30 of 100 (Routine)
La Villita	Mexico	Record high maximum temperature	32.8 C (91.0 F)	29 of 100 (Routine)
Kassler	United States	Record low minimum temperature	1.7 C (35.1 F)	29 of 100 (Routine)
Statesville 2 NNE	United States	Record daily precipitation	46.7 mm (1.8 in)	29 of 100 (Routine)
Fazenda Vista Redonda	Brazil	Record daily precipitation	29.0 mm (1.1 in)	28 of 100 (Routine)
Jarpstrommen	Sweden	Record daily precipitation	36.4 mm (1.4 in)	28 of 100 (Routine)
Storberg	Sweden	Record daily precipitation	28.6 mm (1.1 in)	28 of 100 (Routine)
Catawba	United States	Record daily precipitation	38.6 mm (1.5 in)	28 of 100 (Routine)
Capivari	Brazil	Record daily precipitation	39.0 mm (1.5 in)	27 of 100 (Routine)
Promissao	Brazil	Record daily precipitation	26.0 mm (1.0 in)	27 of 100 (Routine)
Malinaltepec (Cfe)	Mexico	Record high maximum temperature	32.8 C (91.0 F)	27 of 100 (Routine)
Serra Negra	Brazil	Record daily precipitation	51.2 mm (2.0 in)	26 of 100 (Routine)
Buenavista de Loreto	Mexico	Record high maximum temperature	43.9 C (111.0 F)	26 of 100 (Routine)
Presa Valerio Trujano	Mexico	Record daily precipitation	45.7 mm (1.8 in)	26 of 100 (Routine)
Magdalena	Mexico	Record high minimum temperature	20.0 C (68.0 F)	26 of 100 (Routine)
Huetamo	Mexico	Record high maximum temperature	41.7 C (107.1 F)	26 of 100 (Routine)
Puente San Isidro	Mexico	Record high maximum temperature	28.9 C (84.0 F)	26 of 100 (Routine)
Tilzapotla	Mexico	Record daily precipitation	46.0 mm (1.8 in)	26 of 100 (Routine)
Enid	United States	Record high minimum temperature	25.6 C (78.1 F)	26 of 100 (Routine)
Lockhart	United States	Record daily precipitation	27.2 mm (1.1 in)	26 of 100 (Routine)
Koloko Rsvr 1137	United States	Record daily precipitation	31.5 mm (1.2 in)	26 of 100 (Routine)
San Antonio Sur	Mexico	Record low minimum temperature	18.9 C (66.0 F)	25 of 100 (Routine)
San Ignacio	Mexico	Record high maximum temperature	43.9 C (111.0 F)	25 of 100 (Routine)
El Tintero	Mexico	Record high maximum temperature	35.0 C (95.0 F)	25 of 100 (Routine)
Bavertrask	Sweden	Record daily precipitation	30.1 mm (1.2 in)	25 of 100 (Routine)

Counts by Type and Timescale

595 records

Records set or tied on 11 September 1987 by type: Highest daily maximum 125, Lowest daily maximum 49, Highest daily minimum 89, Lowest daily minimum 88, Heaviest daily rainfall 243, Heaviest daily snowfall 1.

Records on 11 September 1987 by type
Record type	Records
Highest daily maximum	125
Lowest daily maximum	49
Highest daily minimum	89
Lowest daily minimum	88
Heaviest daily rainfall	243
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 11 September 1987 by timescale: all-time 2, monthly 19, daily 574.

How Much Records Were Beaten By

443 broken records

Margins by which the 443 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 44.7. Ties are not counted.

Top 20 by Significance

11 September 1987

Top 20 records on 11 September 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 September 1987	Aparan, AM	daily rain	41.7 mm (1.6 in)	28.6 mm (1.1 in)	32 years	52 of 100 (Notable)
11 September 1987	Oestersund-Froesoen, SE	daily rain	37.1 mm (1.5 in)	21.1 mm (0.8 in)	0 years	50 of 100 (Notable)
11 September 1987	Santa Cruz Das Palmeiras, BR	daily rain	52.6 mm (2.1 in)	40.4 mm (1.6 in)	45 years	49 of 100 (Notable)
11 September 1987	Kilauea 1134, US	daily rain	46.5 mm (1.8 in)	13.5 mm (0.5 in)	80 years	47 of 100 (Notable)
11 September 1987	Guaicara, BR	daily rain	56.4 mm (2.2 in)	31.3 mm (1.2 in)	40 years	46 of 100 (Notable)
11 September 1987	Krasnyj Kut, RU	daily rain	26.9 mm (1.1 in)	16.4 mm (0.6 in)	30 years	46 of 100 (Notable)
11 September 1987	Marlinton, US	daily rain	35.1 mm (1.4 in)	17.1 mm (0.7 in)	76 years	46 of 100 (Notable)
11 September 1987	Hawaii Vol Np HQ 54, US	daily rain	39.4 mm (1.6 in)	29.2 mm (1.1 in)	36 years	46 of 100 (Notable)
11 September 1987	Kroksjo, SE	daily rain	38.0 mm (1.5 in)	20.0 mm (0.8 in)	14 years	45 of 100 (Notable)
11 September 1987	Honolulu Intl AP, US	daily rain	26.4 mm (1.0 in)	13.4 mm (0.5 in)	40 years	43 of 100 (Notable)
11 September 1987	Dutch Harbor, US	daily low min	0.6 C (33.1 F)	3.3 C (5.9 F)	70 years	41 of 100 (Notable)
11 September 1987	Meridian Key Fld, US	daily rain	55.4 mm (2.2 in)	41.4 mm (1.6 in)	40 years	39 of 100 (Notable)
11 September 1987	Lagoa Branca, BR	daily rain	35.5 mm (1.4 in)	23.9 mm (0.9 in)	45 years	38 of 100 (Notable)
11 September 1987	Vallbo, SE	daily rain	25.5 mm (1.0 in)	14.5 mm (0.6 in)	4 years	38 of 100 (Notable)
11 September 1987	Capivari, BR	daily rain	41.6 mm (1.6 in)	28.2 mm (1.1 in)	30 years	37 of 100 (Notable)
11 September 1987	Guantanamo Bay NAS, CU	daily high min	27.2 C (81.0 F)	2.2 C (4.0 F)	37 years	37 of 100 (Notable)
11 September 1987	Munsvattnet, SE	daily rain	29.3 mm (1.2 in)	15.8 mm (0.6 in)	8 years	37 of 100 (Notable)
11 September 1987	Patterson, US	daily rain	63.2 mm (2.5 in)	44.7 mm (1.8 in)	16 years	37 of 100 (Notable)
11 September 1987	Princeville Rch 1117, US	daily rain	47.0 mm (1.9 in)	21.1 mm (0.8 in)	36 years	37 of 100 (Notable)
11 September 1987	Guaxupe Aneel/Cesp, BR	daily rain	36.5 mm (1.4 in)	13.5 mm (0.5 in)	70 years	36 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 1987

Records set or tied on this calendar date in each year from 1809 to 1987. 1987 had 595 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 1987-09-11: 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).

Histogram of margins by which records were beaten on 11 September 1987
Margin	Records
0 to 10	366
10 to 20	51
20 to 30	17
30 to 40	6
40 to 50	3