Weather Records on 11 September 1984

888 weather records were set or tied worldwide on 11 September 1984. Highest significance: Wanaaring (Thurloo Downs), AU.

Key Facts for 11 September 1984

On 11 September 1984, 888 weather records were set or tied at long-record stations worldwide.
306 were record highs and 262 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 879 daily.
Wanaaring (Thurloo Downs) set a monthly record daily precipitation of 80.0 mm (3.1 in) on 11 September 1984.
Across 164 earlier years (1809 to 2026) the same calendar date averaged 421 records.

Record Map

888 stations

888 station records on 11 September 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 September 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Wanaaring (Thurloo Downs)	Australia	Record daily precipitation	80.0 mm (3.1 in)	83 of 100 (Exceptional)
Hermann	United States	Record daily precipitation	95.3 mm (3.8 in)	66 of 100 (Major)
Bradshaw Homestead	Australia	Record daily precipitation	32.0 mm (1.3 in)	65 of 100 (Major)
Tenosique (Smn)	Mexico	Record daily precipitation	165.4 mm (6.5 in)	63 of 100 (Major)
Kangiara (Laverstock)	Australia	Record daily precipitation	105.0 mm (4.1 in)	59 of 100 (Notable)
Monroe City	United States	Record daily precipitation	86.4 mm (3.4 in)	59 of 100 (Notable)
Roros	Norway	Record daily precipitation	47.7 mm (1.9 in)	57 of 100 (Notable)
Brockport	United States	Record daily precipitation	57.7 mm (2.3 in)	56 of 100 (Notable)
Powers Lake 1N	United States	Record daily precipitation	38.1 mm (1.5 in)	55 of 100 (Notable)
Tooraweenah (Denham St)	Australia	Record daily precipitation	30.0 mm (1.2 in)	51 of 100 (Notable)
Prairie du Rocher 3 WNW	United States	Record daily precipitation	71.1 mm (2.8 in)	51 of 100 (Notable)
Fort Beaufort	South Africa	Record daily precipitation	80.5 mm (3.2 in)	50 of 100 (Notable)
Arecibo 3 ESE	Puerto Rico [United States]	Record low minimum temperature	16.1 C (61.0 F)	49 of 100 (Notable)
Tevriz	Russia	Record daily precipitation	31.0 mm (1.2 in)	49 of 100 (Notable)
Rushville	United States	Record daily precipitation	78.0 mm (3.1 in)	49 of 100 (Notable)
Golden Pond 8 N	United States	Record daily precipitation	83.8 mm (3.3 in)	48 of 100 (Notable)
Martinsburg	United States	Record daily precipitation	79.8 mm (3.1 in)	48 of 100 (Notable)
Mt Vernon 3 NE	United States	Record daily precipitation	54.6 mm (2.1 in)	47 of 100 (Notable)
Waterloo 6SW	United States	Record daily precipitation	73.2 mm (2.9 in)	46 of 100 (Notable)
Batavia	United States	Record daily precipitation	46.7 mm (1.8 in)	46 of 100 (Notable)
Nariel Creek (Simpson)	Australia	Record daily precipitation	40.0 mm (1.6 in)	45 of 100 (Notable)
Coyame (Cfe)	Mexico	Record daily precipitation	254.8 mm (10.0 in)	43 of 100 (Notable)
Catemaco (Cfe)	Mexico	Record daily precipitation	135.4 mm (5.3 in)	42 of 100 (Notable)
Webster	United States	Record daily precipitation	26.2 mm (1.0 in)	42 of 100 (Notable)
Pacific	United States	Record daily precipitation	45.2 mm (1.8 in)	41 of 100 (Notable)
St Charles Elm Pt	United States	Record daily precipitation	58.4 mm (2.3 in)	41 of 100 (Notable)
Valley Park	United States	Record daily precipitation	67.1 mm (2.6 in)	40 of 100 (Notable)
Jayuya	Puerto Rico [United States]	Record daily precipitation	105.7 mm (4.2 in)	39 of 100 (Notable)
Vandalia	United States	Record daily precipitation	32.3 mm (1.3 in)	39 of 100 (Notable)
Boulia Airport	Australia	Record low maximum temperature	19.0 C (66.2 F)	38 of 100 (Notable)
Ljusnedal	Sweden	Record daily precipitation	32.7 mm (1.3 in)	38 of 100 (Notable)
Manti	United States	Record high minimum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Chester	United States	Record daily precipitation	63.5 mm (2.5 in)	37 of 100 (Notable)
Cook STN	United States	Record daily precipitation	54.4 mm (2.1 in)	37 of 100 (Notable)
Farmington	United States	Record daily precipitation	50.3 mm (2.0 in)	37 of 100 (Notable)
Mummulgum (Bingeebeebra)	Australia	Record daily precipitation	40.0 mm (1.6 in)	36 of 100 (Notable)
Nevada City	United States	Record high minimum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Climax	United States	Record high minimum temperature	5.0 C (41.0 F)	36 of 100 (Notable)
Albion	United States	Record daily precipitation	59.7 mm (2.4 in)	36 of 100 (Notable)
Wymah (Gwandallen)	Australia	Record daily precipitation	30.0 mm (1.2 in)	35 of 100 (Notable)
Tallangatta (Bullioh)	Australia	Record daily precipitation	28.0 mm (1.1 in)	35 of 100 (Notable)
Ft Pierce	United States	Record low minimum temperature	19.4 C (66.9 F)	35 of 100 (Notable)
Liberal	United States	Record high maximum temperature	40.6 C (105.1 F)	35 of 100 (Notable)
Taloga	United States	Record high minimum temperature	23.9 C (75.0 F)	34 of 100 (Routine)
Escalante	United States	Record high minimum temperature	15.0 C (59.0 F)	34 of 100 (Routine)
Dartmouth Reservoir	Australia	Record daily precipitation	27.2 mm (1.1 in)	33 of 100 (Routine)
Willcox	United States	Record daily precipitation	29.2 mm (1.1 in)	33 of 100 (Routine)
Wellington	United States	Record high maximum temperature	41.1 C (106.0 F)	33 of 100 (Routine)
Mitchell 2 N	United States	Record low maximum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Miami	United States	Record high maximum temperature	38.9 C (102.0 F)	33 of 100 (Routine)
Walla Walla Post Office	Australia	Record daily precipitation	25.2 mm (1.0 in)	32 of 100 (Routine)
San Sebastian del Oeste	Mexico	Record low minimum temperature	10.0 C (50.0 F)	32 of 100 (Routine)
Juchitan de Zaragoza	Mexico	Record low minimum temperature	17.8 C (64.0 F)	32 of 100 (Routine)
Nerchinskij Zavod	Russia	Record high minimum temperature	11.9 C (53.4 F)	32 of 100 (Routine)
Myskelasen_D	Sweden	Record daily precipitation	35.2 mm (1.4 in)	32 of 100 (Routine)
Ft Madison	United States	Record daily precipitation	37.1 mm (1.5 in)	32 of 100 (Routine)
Mexico	United States	Record daily precipitation	57.4 mm (2.3 in)	32 of 100 (Routine)
Union	United States	Record daily precipitation	81.0 mm (3.2 in)	32 of 100 (Routine)
Okeene	United States	Record high minimum temperature	25.6 C (78.1 F)	32 of 100 (Routine)
Elberta	United States	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)

Counts by Type and Timescale

888 records

Records set or tied on 11 September 1984 by type: Highest daily maximum 129, Lowest daily maximum 197, Highest daily minimum 177, Lowest daily minimum 65, Heaviest daily rainfall 319, Heaviest daily snowfall 1.

Records on 11 September 1984 by type
Record type	Records
Highest daily maximum	129
Lowest daily maximum	197
Highest daily minimum	177
Lowest daily minimum	65
Heaviest daily rainfall	319
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 11 September 1984 by timescale: all-time 0, monthly 9, daily 879.

How Much Records Were Beaten By

731 broken records

Margins by which the 731 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 185.2. Ties are not counted.

Top 20 by Significance

11 September 1984

Top 20 records on 11 September 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 September 1984	Wanaaring (Thurloo Downs), AU	monthly rain	80.0 mm (3.1 in)	43.2 mm (1.7 in)	80 years	83 of 100 (Exceptional)
11 September 1984	Hermann, US	daily rain	95.3 mm (3.8 in)	49.6 mm (2.0 in)	91 years	66 of 100 (Major)
11 September 1984	Bradshaw Homestead, AU	daily rain	32.0 mm (1.3 in)	32.0 mm (1.3 in)	85 years	65 of 100 (Major)
11 September 1984	Tenosique (Smn), MX	daily rain	165.4 mm (6.5 in)	95.5 mm (3.8 in)	57 years	63 of 100 (Major)
11 September 1984	Kangiara (Laverstock), AU	monthly rain	105.0 mm (4.1 in)	41.0 mm (1.6 in)	3 years	59 of 100 (Notable)
11 September 1984	Monroe City, US	daily rain	86.4 mm (3.4 in)	43.2 mm (1.7 in)	83 years	59 of 100 (Notable)
11 September 1984	Roros, NO	daily rain	47.7 mm (1.9 in)	17.4 mm (0.7 in)	28 years	57 of 100 (Notable)
11 September 1984	Brockport, US	daily rain	57.7 mm (2.3 in)	38.1 mm (1.5 in)	29 years	56 of 100 (Notable)
11 September 1984	Powers Lake 1N, US	daily rain	38.1 mm (1.5 in)	31.7 mm (1.2 in)	63 years	55 of 100 (Notable)
11 September 1984	Tooraweenah (Denham St), AU	daily rain	30.0 mm (1.2 in)	19.3 mm (0.8 in)	70 years	51 of 100 (Notable)
11 September 1984	Prairie du Rocher 3 WNW, US	daily rain	71.1 mm (2.8 in)	56.4 mm (2.2 in)	29 years	51 of 100 (Notable)
11 September 1984	Fort Beaufort, ZA	monthly rain	80.5 mm (3.2 in)	14.5 mm (0.6 in)	55 years	50 of 100 (Notable)
11 September 1984	Arecibo 3 ESE, PR	daily low min	16.1 C (61.0 F)	3.9 C (7.0 F)	34 years	49 of 100 (Notable)
11 September 1984	Tevriz, RU	daily rain	31.0 mm (1.2 in)	15.8 mm (0.6 in)	41 years	49 of 100 (Notable)
11 September 1984	Rushville, US	daily rain	78.0 mm (3.1 in)	36.6 mm (1.4 in)	56 years	49 of 100 (Notable)
11 September 1984	Golden Pond 8 N, US	daily rain	83.8 mm (3.3 in)	71.1 mm (2.8 in)	29 years	48 of 100 (Notable)
11 September 1984	Martinsburg, US	daily rain	79.8 mm (3.1 in)	56.7 mm (2.2 in)	21 years	48 of 100 (Notable)
11 September 1984	Mt Vernon 3 NE, US	daily rain	54.6 mm (2.1 in)	34.8 mm (1.4 in)	50 years	47 of 100 (Notable)
11 September 1984	Waterloo 6SW, US	daily rain	73.2 mm (2.9 in)	46.0 mm (1.8 in)	19 years	46 of 100 (Notable)
11 September 1984	Batavia, US	daily rain	46.7 mm (1.8 in)	23.8 mm (0.9 in)	64 years	46 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 1984

Records set or tied on this calendar date in each year from 1809 to 1984. 1984 had 888 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 1984-09-11: 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 25	702
25 to 50	23
50 to 75	3
75 to 100	1
100 to 125	1
125 to 150	0
150 to 175	0
175 to 200	1