Weather Records on 18 September 1984

951 weather records were set or tied worldwide on 18 September 1984. Highest significance: Coen Post Office, AU.

Key Facts for 18 September 1984

On 18 September 1984, 951 weather records were set or tied at long-record stations worldwide.
423 were record highs and 279 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 32 monthly and 917 daily.
Coen Post Office set a monthly record daily precipitation of 66.0 mm (2.6 in) on 18 September 1984.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 418 records.

Record Map

951 stations

951 station records on 18 September 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Coen Post Office	Australia	Record daily precipitation	66.0 mm (2.6 in)	71 of 100 (Major)
Levendale	Australia	Record daily precipitation	38.0 mm (1.5 in)	66 of 100 (Major)
Apsley (Parki)	Australia	Record daily precipitation	40.0 mm (1.6 in)	59 of 100 (Notable)
Mayaguez City	Puerto Rico [United States]	Record daily precipitation	134.1 mm (5.3 in)	58 of 100 (Notable)
Vasilevici	Belarus	Record daily precipitation	53.3 mm (2.1 in)	56 of 100 (Notable)
Pilvo	Russia	Record daily precipitation	64.8 mm (2.6 in)	56 of 100 (Notable)
Gyzylarbat	Turkmenistan	Record daily precipitation	27.4 mm (1.1 in)	56 of 100 (Notable)
Melton Mowbray (Lovely Banks)	Australia	Record daily precipitation	30.4 mm (1.2 in)	55 of 100 (Notable)
Zhytomyr	Ukraine	Record daily precipitation	44.0 mm (1.7 in)	53 of 100 (Notable)
Nubeena	Australia	Record daily precipitation	29.0 mm (1.1 in)	52 of 100 (Notable)
Una (Agr)	South Africa	Record daily precipitation	26.0 mm (1.0 in)	52 of 100 (Notable)
Warburton	Australia	Record daily precipitation	53.8 mm (2.1 in)	51 of 100 (Notable)
Brownsville	United States	Record daily precipitation	200.7 mm (7.9 in)	51 of 100 (Notable)
Oenpelli	Australia	Record daily precipitation	49.6 mm (2.0 in)	50 of 100 (Notable)
Ross (Macquarie River)	Australia	Record daily precipitation	34.4 mm (1.4 in)	50 of 100 (Notable)
Timovskoe	Russia	Record daily precipitation	47.2 mm (1.9 in)	50 of 100 (Notable)
Ovruch	Ukraine	Record daily precipitation	63.2 mm (2.5 in)	50 of 100 (Notable)
Miena Dam	Australia	Record daily precipitation	46.2 mm (1.8 in)	49 of 100 (Notable)
Bajkit	Russia	Record daily precipitation	34.2 mm (1.3 in)	49 of 100 (Notable)
Podor	Senegal	Record high minimum temperature	29.2 C (84.6 F)	48 of 100 (Notable)
Federal Pt	United States	Record daily precipitation	100.3 mm (3.9 in)	48 of 100 (Notable)
Harlingen	United States	Record daily precipitation	128.3 mm (5.1 in)	48 of 100 (Notable)
Anglesea	Australia	Record daily precipitation	38.0 mm (1.5 in)	47 of 100 (Notable)
Woodbury (Warringa)	Australia	Record daily precipitation	26.6 mm (1.0 in)	47 of 100 (Notable)
Jacksonville Cecil Fld NAS	United States	Record daily precipitation	87.1 mm (3.4 in)	47 of 100 (Notable)
Bodajbo	Russia	Record daily precipitation	29.6 mm (1.2 in)	46 of 100 (Notable)
Mamakuil	South Africa	Record daily precipitation	30.0 mm (1.2 in)	46 of 100 (Notable)
Jacksonville NAS	United States	Record daily precipitation	131.3 mm (5.2 in)	45 of 100 (Notable)
Campbell Town Post Office	Australia	Record daily precipitation	28.0 mm (1.1 in)	44 of 100 (Notable)
Zhitckovichi	Belarus	Record daily precipitation	26.2 mm (1.0 in)	44 of 100 (Notable)
Etla	Mexico	Record daily precipitation	65.3 mm (2.6 in)	44 of 100 (Notable)
Campania (the Pines)	Australia	Record daily precipitation	32.6 mm (1.3 in)	43 of 100 (Notable)
Wattle Hill	Australia	Record daily precipitation	65.0 mm (2.6 in)	43 of 100 (Notable)
Ukiah	United States	Record high minimum temperature	21.7 C (71.1 F)	43 of 100 (Notable)
Lilydale	Australia	Record daily precipitation	30.2 mm (1.2 in)	42 of 100 (Notable)
Middleton Post Office	Australia	Record daily precipitation	32.4 mm (1.3 in)	42 of 100 (Notable)
Woodland 1 WNW	United States	Record high minimum temperature	22.8 C (73.0 F)	41 of 100 (Notable)
Virginia City	United States	Record high maximum temperature	28.9 C (84.0 F)	40 of 100 (Notable)
Palmerville	Australia	Record high minimum temperature	22.5 C (72.5 F)	39 of 100 (Notable)
Weabonga (Monomeeth)	Australia	Record daily precipitation	28.0 mm (1.1 in)	39 of 100 (Notable)
Wyelangta	Australia	Record daily precipitation	72.4 mm (2.9 in)	39 of 100 (Notable)
Cape Bruny Lighthouse	Australia	Record daily precipitation	29.4 mm (1.2 in)	39 of 100 (Notable)
Eaglehawk Neck (Jetty Road)	Australia	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Merced	United States	Record high minimum temperature	22.2 C (72.0 F)	39 of 100 (Notable)
Santa Barbara	United States	Record high minimum temperature	20.6 C (69.1 F)	39 of 100 (Notable)
Middlesboro Fire Dept	United States	Record low minimum temperature	3.3 C (37.9 F)	39 of 100 (Notable)
Roxboro 7 ESE	United States	Record low minimum temperature	5.0 C (41.0 F)	39 of 100 (Notable)
Snowville	United States	Record high minimum temperature	13.3 C (55.9 F)	39 of 100 (Notable)
Sacramento 5 ESE	United States	Record high minimum temperature	25.0 C (77.0 F)	39 of 100 (Notable)
Powelltown Dnre	Australia	Record daily precipitation	62.0 mm (2.4 in)	38 of 100 (Notable)
Bothwell (Cluny)	Australia	Record daily precipitation	29.4 mm (1.2 in)	38 of 100 (Notable)
Port Isabel	United States	Record daily precipitation	129.3 mm (5.1 in)	38 of 100 (Notable)
Coupeville 1 S	United States	Record high minimum temperature	13.9 C (57.0 F)	38 of 100 (Notable)
Irkutsk	Russia	Record high maximum temperature	26.3 C (79.3 F)	37 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record daily precipitation	28.9 mm (1.1 in)	37 of 100 (Notable)
Wessington Springs	United States	Record high maximum temperature	34.4 C (93.9 F)	37 of 100 (Notable)
Dover	Australia	Record daily precipitation	37.2 mm (1.5 in)	36 of 100 (Notable)
Bronte Heights	Australia	Record daily precipitation	33.0 mm (1.3 in)	36 of 100 (Notable)
Jacksonville Beach	United States	Record daily precipitation	94.2 mm (3.7 in)	36 of 100 (Notable)
Biloxi	United States	Record low minimum temperature	11.1 C (52.0 F)	36 of 100 (Notable)

Counts by Type and Timescale

951 records

Records set or tied on 18 September 1984 by type: Highest daily maximum 212, Lowest daily maximum 123, Highest daily minimum 211, Lowest daily minimum 156, Heaviest daily rainfall 248, Deepest snow cover 1.

Records on 18 September 1984 by type
Record type	Records
Highest daily maximum	212
Lowest daily maximum	123
Highest daily minimum	211
Lowest daily minimum	156
Heaviest daily rainfall	248
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 18 September 1984 by timescale: all-time 2, monthly 32, daily 917.

How Much Records Were Beaten By

725 broken records

Margins by which the 725 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 141.8. Ties are not counted.

Top 20 by Significance

18 September 1984

Top 20 records on 18 September 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1984	Coen Post Office, AU	monthly rain	66.0 mm (2.6 in)	47.5 mm (1.9 in)	41 years	71 of 100 (Major)
18 September 1984	Levendale, AU	daily rain	38.0 mm (1.5 in)	28.6 mm (1.1 in)	64 years	66 of 100 (Major)
18 September 1984	Apsley (Parki), AU	daily rain	40.0 mm (1.6 in)	26.3 mm (1.0 in)	42 years	59 of 100 (Notable)
18 September 1984	Mayaguez City, PR	daily rain	134.1 mm (5.3 in)	79.5 mm (3.1 in)	36 years	58 of 100 (Notable)
18 September 1984	Vasilevici, BY	monthly rain	53.3 mm (2.1 in)	8.3 mm (0.33 in)	75 years	56 of 100 (Notable)
18 September 1984	Pilvo, RU	daily rain	64.8 mm (2.6 in)	41.8 mm (1.6 in)	40 years	56 of 100 (Notable)
18 September 1984	Gyzylarbat, TM	daily rain	27.4 mm (1.1 in)	18.2 mm (0.7 in)	52 years	56 of 100 (Notable)
18 September 1984	Melton Mowbray (Lovely Banks), AU	daily rain	30.4 mm (1.2 in)	18.2 mm (0.7 in)	41 years	55 of 100 (Notable)
18 September 1984	Zhytomyr, UA	daily rain	44.0 mm (1.7 in)	35.1 mm (1.4 in)	33 years	53 of 100 (Notable)
18 September 1984	Nubeena, AU	daily rain	29.0 mm (1.1 in)	14.3 mm (0.6 in)	64 years	52 of 100 (Notable)
18 September 1984	Una (Agr), ZA	daily rain	26.0 mm (1.0 in)	26.0 mm (1.0 in)	64 years	52 of 100 (Notable)
18 September 1984	Warburton, AU	daily rain	53.8 mm (2.1 in)	22.3 mm (0.9 in)	72 years	51 of 100 (Notable)
18 September 1984	Brownsville, US	daily rain	200.7 mm (7.9 in)	141.8 mm (5.6 in)	13 years	51 of 100 (Notable)
18 September 1984	Oenpelli, AU	monthly rain	49.6 mm (2.0 in)	18.6 mm (0.7 in)	36 years	50 of 100 (Notable)
18 September 1984	Ross (Macquarie River), AU	monthly rain	34.4 mm (1.4 in)	6.5 mm (0.26 in)	66 years	50 of 100 (Notable)
18 September 1984	Timovskoe, RU	daily rain	47.2 mm (1.9 in)	19.0 mm (0.7 in)	60 years	50 of 100 (Notable)
18 September 1984	Ovruch, UA	monthly rain	63.2 mm (2.5 in)	21.9 mm (0.9 in)	1 year	50 of 100 (Notable)
18 September 1984	Miena Dam, AU	monthly rain	46.2 mm (1.8 in)	3.8 mm (0.15 in)	79 years	49 of 100 (Notable)
18 September 1984	Bajkit, RU	daily rain	34.2 mm (1.3 in)	21.3 mm (0.8 in)	19 years	49 of 100 (Notable)
18 September 1984	Podor, SN	daily high min	29.2 C (84.6 F)	1.6 C (2.9 F)	124 years	48 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 1984

Records set or tied on this calendar date in each year from 1803 to 1984. 1984 had 951 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 1984-09-18: 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 20	691
20 to 40	24
40 to 60	4
60 to 80	3
80 to 100	1
100 to 120	1
120 to 140	0
140 to 160	1