Weather Records on 18 September 1983

936 weather records were set or tied worldwide on 18 September 1983. Highest significance: Port Angeles, US.

Key Facts for 18 September 1983

On 18 September 1983, 936 weather records were set or tied at long-record stations worldwide.
295 were record highs and 159 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 22 monthly and 913 daily.
Port Angeles set a daily record precipitation of 30.5 mm (1.2 in) on 18 September 1983.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 418 records.

Record Map

936 stations

936 station records on 18 September 1983 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1983: highest significance records shown on the map
Station	Country	Type	Value	Significance
Port Angeles	United States	Record daily precipitation	30.5 mm (1.2 in)	59 of 100 (Notable)
Sarutaia (US.Boa Vista-Clfsc)	Brazil	Record daily precipitation	60.7 mm (2.4 in)	56 of 100 (Notable)
Pesaro	Italy	Record daily precipitation	116.2 mm (4.6 in)	56 of 100 (Notable)
Oestersund-Froesoen	Sweden	Record daily precipitation	37.1 mm (1.5 in)	56 of 100 (Notable)
Muskegon Co AP	United States	Record daily precipitation	67.8 mm (2.7 in)	56 of 100 (Notable)
Santa Rita Do Jacutinga	Brazil	Record daily precipitation	39.0 mm (1.5 in)	54 of 100 (Notable)
Kent City 2 SW	United States	Record daily precipitation	72.4 mm (2.9 in)	53 of 100 (Notable)
Central Michigan UNIV	United States	Record daily precipitation	44.5 mm (1.8 in)	53 of 100 (Notable)
Queluz (Centro Saude)	Brazil	Record daily precipitation	37.8 mm (1.5 in)	52 of 100 (Notable)
Mtn View 91	United States	Record low maximum temperature	17.8 C (64.0 F)	51 of 100 (Notable)
Sao Francisco da Corredeira	Brazil	Record daily precipitation	60.8 mm (2.4 in)	50 of 100 (Notable)
Aracaiba (Capoeiras)	Brazil	Record daily precipitation	57.9 mm (2.3 in)	49 of 100 (Notable)
Luminarias	Brazil	Record daily precipitation	53.4 mm (2.1 in)	48 of 100 (Notable)
Avare	Brazil	Record daily precipitation	52.5 mm (2.1 in)	48 of 100 (Notable)
Gladwin	United States	Record daily precipitation	41.4 mm (1.6 in)	48 of 100 (Notable)
Walterhall	Australia	Record daily precipitation	80.0 mm (3.1 in)	47 of 100 (Notable)
Fazenda Sao Gabriel	Brazil	Record daily precipitation	40.0 mm (1.6 in)	47 of 100 (Notable)
Greenville 2 NNE	United States	Record daily precipitation	71.6 mm (2.8 in)	47 of 100 (Notable)
Saginaw Mbs Intl AP	United States	Record daily precipitation	36.1 mm (1.4 in)	47 of 100 (Notable)
Mount Jukes	Australia	Record daily precipitation	37.0 mm (1.5 in)	45 of 100 (Notable)
Piraju	Brazil	Record daily precipitation	46.8 mm (1.8 in)	45 of 100 (Notable)
Santa Sofia	Brazil	Record daily precipitation	54.1 mm (2.1 in)	45 of 100 (Notable)
Ft Logan 4 ESE	United States	Record daily snowfall	5.1 cm (2.0 in)	45 of 100 (Notable)
Usina Do Chicao	Brazil	Record daily precipitation	64.1 mm (2.5 in)	44 of 100 (Notable)
Altinopolis	Brazil	Record daily precipitation	57.8 mm (2.3 in)	44 of 100 (Notable)
Guaicara	Brazil	Record daily precipitation	55.1 mm (2.2 in)	44 of 100 (Notable)
Penapolis	Brazil	Record daily precipitation	53.1 mm (2.1 in)	44 of 100 (Notable)
Taboas	Brazil	Record daily precipitation	27.6 mm (1.1 in)	43 of 100 (Notable)
Conservatoria	Brazil	Record daily precipitation	46.4 mm (1.8 in)	42 of 100 (Notable)
Iporanga	Brazil	Record daily precipitation	57.2 mm (2.3 in)	42 of 100 (Notable)
Fazenda Chantebled	Brazil	Record daily precipitation	47.9 mm (1.9 in)	42 of 100 (Notable)
Promissao	Brazil	Record daily precipitation	57.9 mm (2.3 in)	42 of 100 (Notable)
Bauru (Pdv)	Brazil	Record daily precipitation	49.6 mm (2.0 in)	42 of 100 (Notable)
Servico Social de Menores	Brazil	Record daily precipitation	46.9 mm (1.8 in)	42 of 100 (Notable)
Urupes	Brazil	Record daily precipitation	35.1 mm (1.4 in)	41 of 100 (Notable)
Fazenda Vista Redonda	Brazil	Record daily precipitation	43.2 mm (1.7 in)	41 of 100 (Notable)
Yibin	China	Record daily precipitation	66.9 mm (2.6 in)	41 of 100 (Notable)
Hart 3 WSW	United States	Record daily precipitation	52.1 mm (2.1 in)	41 of 100 (Notable)
Wowan Post Office	Australia	Record daily precipitation	41.0 mm (1.6 in)	40 of 100 (Notable)
Fernao Dias	Brazil	Record daily precipitation	53.0 mm (2.1 in)	40 of 100 (Notable)
Port Hastings	Canada	Record daily precipitation	59.2 mm (2.3 in)	40 of 100 (Notable)
Summerside A	Canada	Record daily precipitation	42.6 mm (1.7 in)	40 of 100 (Notable)
Usina Avanhandava (Cpfl)	Brazil	Record daily precipitation	42.1 mm (1.7 in)	39 of 100 (Notable)
Fazenda Sao Luiz	Brazil	Record daily precipitation	50.2 mm (2.0 in)	39 of 100 (Notable)
Maleny Denning Rd	Australia	Record daily precipitation	40.0 mm (1.6 in)	38 of 100 (Notable)
Dulacca Truck Stop	Australia	Record daily precipitation	44.0 mm (1.7 in)	38 of 100 (Notable)
Candido Rodrigues	Brazil	Record daily precipitation	53.4 mm (2.1 in)	38 of 100 (Notable)
Mendonca	Brazil	Record daily precipitation	50.2 mm (2.0 in)	38 of 100 (Notable)
Macucos	Brazil	Record daily precipitation	50.0 mm (2.0 in)	38 of 100 (Notable)
San Bernardo	Mexico	Record daily precipitation	44.2 mm (1.7 in)	38 of 100 (Notable)
Paso de San Antonio	Mexico	Record daily precipitation	140.0 mm (5.5 in)	38 of 100 (Notable)
Strathmuir	Australia	Record daily precipitation	31.4 mm (1.2 in)	37 of 100 (Notable)
Angatuba	Brazil	Record daily precipitation	56.9 mm (2.2 in)	37 of 100 (Notable)
Porto Ermidao (Faz.Harmonia)	Brazil	Record daily precipitation	45.5 mm (1.8 in)	37 of 100 (Notable)
Fazenda Lajeadinho	Brazil	Record daily precipitation	64.1 mm (2.5 in)	37 of 100 (Notable)
Luz (Estacao)	Brazil	Record daily precipitation	42.9 mm (1.7 in)	37 of 100 (Notable)
Engenheiro Hermilo	Brazil	Record daily precipitation	46.2 mm (1.8 in)	37 of 100 (Notable)
Lawrence	United States	Record high minimum temperature	23.9 C (75.0 F)	37 of 100 (Notable)
Tewantin Post Office	Australia	Record daily precipitation	53.1 mm (2.1 in)	36 of 100 (Notable)
Agudos	Brazil	Record daily precipitation	53.8 mm (2.1 in)	36 of 100 (Notable)

Counts by Type and Timescale

936 records

Records set or tied on 18 September 1983 by type: Highest daily maximum 120, Lowest daily maximum 106, Highest daily minimum 175, Lowest daily minimum 53, Heaviest daily rainfall 463, Heaviest daily snowfall 11, Deepest snow cover 8.

Records on 18 September 1983 by type
Record type	Records
Highest daily maximum	120
Lowest daily maximum	106
Highest daily minimum	175
Lowest daily minimum	53
Heaviest daily rainfall	463
Heaviest daily snowfall	11
Deepest snow cover	8

Records on 18 September 1983 by timescale: all-time 1, monthly 22, daily 913.

How Much Records Were Beaten By

759 broken records

Margins by which the 759 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 79.0. Ties are not counted.

Top 20 by Significance

18 September 1983

Top 20 records on 18 September 1983 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1983	Port Angeles, US	daily rain	30.5 mm (1.2 in)	22.9 mm (0.9 in)	48 years	59 of 100 (Notable)
18 September 1983	Sarutaia (US.Boa Vista-Clfsc), BR	daily rain	60.7 mm (2.4 in)	47.2 mm (1.9 in)	44 years	56 of 100 (Notable)
18 September 1983	Pesaro, IT	daily rain	116.2 mm (4.6 in)	79.0 mm (3.1 in)	22 years	56 of 100 (Notable)
18 September 1983	Oestersund-Froesoen, SE	daily rain	37.1 mm (1.5 in)	17.5 mm (0.7 in)	36 years	56 of 100 (Notable)
18 September 1983	Muskegon Co AP, US	daily rain	67.8 mm (2.7 in)	44.7 mm (1.8 in)	30 years	56 of 100 (Notable)
18 September 1983	Santa Rita Do Jacutinga, BR	daily rain	39.0 mm (1.5 in)	28.2 mm (1.1 in)	46 years	54 of 100 (Notable)
18 September 1983	Kent City 2 SW, US	daily rain	72.4 mm (2.9 in)	37.3 mm (1.5 in)	56 years	53 of 100 (Notable)
18 September 1983	Central Michigan UNIV, US	daily rain	44.5 mm (1.8 in)	22.4 mm (0.9 in)	83 years	53 of 100 (Notable)
18 September 1983	Queluz (Centro Saude), BR	daily rain	37.8 mm (1.5 in)	34.8 mm (1.4 in)	30 years	52 of 100 (Notable)
18 September 1983	Mtn View 91, US	monthly low max	17.8 C (64.0 F)	2.2 C (4.0 F)	76 years	51 of 100 (Notable)
18 September 1983	Sao Francisco da Corredeira, BR	daily rain	60.8 mm (2.4 in)	38.1 mm (1.5 in)	40 years	50 of 100 (Notable)
18 September 1983	Aracaiba (Capoeiras), BR	daily rain	57.9 mm (2.3 in)	45.0 mm (1.8 in)	20 years	49 of 100 (Notable)
18 September 1983	Luminarias, BR	daily rain	53.4 mm (2.1 in)	35.1 mm (1.4 in)	30 years	48 of 100 (Notable)
18 September 1983	Avare, BR	daily rain	52.5 mm (2.1 in)	36.3 mm (1.4 in)	44 years	48 of 100 (Notable)
18 September 1983	Gladwin, US	daily rain	41.4 mm (1.6 in)	18.5 mm (0.7 in)	78 years	48 of 100 (Notable)
18 September 1983	Walterhall, AU	monthly rain	80.0 mm (3.1 in)	10.9 mm (0.4 in)	65 years	47 of 100 (Notable)
18 September 1983	Fazenda Sao Gabriel, BR	daily rain	40.0 mm (1.6 in)	33.0 mm (1.3 in)	30 years	47 of 100 (Notable)
18 September 1983	Greenville 2 NNE, US	daily rain	71.6 mm (2.8 in)	40.6 mm (1.6 in)	10 years	47 of 100 (Notable)
18 September 1983	Saginaw Mbs Intl AP, US	daily rain	36.1 mm (1.4 in)	14.3 mm (0.6 in)	83 years	47 of 100 (Notable)
18 September 1983	Mount Jukes, AU	daily rain	37.0 mm (1.5 in)	27.6 mm (1.1 in)	42 years	45 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

1803 to 1983

Records set or tied on this calendar date in each year from 1803 to 1983. 1983 had 936 records.

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

Records on 09-18 in each year
Year	Records
1803	1
1811	1
1814	1
1819	1
1829	1
1832	1
1834	1
1835	1
1837	2
1847	2
1848	1
1849	1
1851	4
1859	1
1861	1
1865	1
1869	1
1871	1
1875	1
1876	2
1877	1
1879	1
1880	1
1881	1
1882	1
1885	1
1886	4
1889	6
1890	1
1891	1
1893	4
1894	2
1895	2
1896	4
1897	3
1898	5
1899	3
1900	2
1901	10
1902	8
1903	58
1904	6
1905	22
1906	16
1907	4
1908	11
1909	17
1910	5
1911	8
1912	43
1913	44
1914	56
1915	41
1916	58
1917	99
1918	57
1919	48
1920	56
1921	213
1922	45
1923	114
1924	62
1925	269
1926	205
1927	189
1928	114
1929	309
1930	124
1931	429
1932	226
1933	370
1934	188
1935	281
1936	155
1937	422
1938	373
1939	190
1940	402
1941	318
1942	1,001
1943	624
1944	503
1945	732
1946	576
1947	927
1948	427
1949	356
1950	370
1951	320
1952	340
1953	245
1954	446
1955	672
1956	587
1957	429
1958	491
1959	829
1960	351
1961	478
1962	360
1963	453
1964	282
1965	1,172
1966	498
1967	357
1968	763
1969	424
1970	377
1971	1,245
1972	691
1973	593
1974	559
1975	976
1976	615
1977	619
1978	1,162
1979	709
1980	652
1981	1,671
1982	603
1983	936
1984	951
1985	636
1986	730
1987	1,244
1988	997
1989	778
1990	904
1991	1,377
1992	821
1993	747
1994	852
1995	935
1996	1,237
1997	935
1998	1,038
1999	583
2000	1,146
2001	993
2002	828
2003	815
2004	1,027
2005	781
2006	1,309
2007	670
2008	697
2009	692
2010	1,040
2011	1,050
2012	922
2013	666
2014	682
2015	934
2016	893
2017	518
2018	1,200
2019	768
2020	682
2021	582
2022	613
2023	639
2024	687
2025	471
2026	864

Download the Data

Data for records on 1983-09-18: 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 10	546
10 to 20	108
20 to 30	51
30 to 40	26
40 to 50	16
50 to 60	9
60 to 70	0
70 to 80	3