Weather Records on 30 September 1984

1,267 weather records were set or tied worldwide on 30 September 1984. Highest significance: Madras/Minambakkam, IN.

Key Facts for 30 September 1984

On 30 September 1984, 1,267 weather records were set or tied at long-record stations worldwide.
73 were record highs and 1,046 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 253 monthly and 1,014 daily.
Madras/Minambakkam set a monthly record daily precipitation of 198.9 mm (7.8 in) on 30 September 1984.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 434 records.

Record Map

1,267 stations

1,267 station records on 30 September 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Madras/Minambakkam	India	Record daily precipitation	198.9 mm (7.8 in)	76 of 100 (Major)
Pte de Chassiron	France	Record daily precipitation	42.8 mm (1.7 in)	66 of 100 (Major)
Sao Joao de Petropolis	Brazil	Record daily precipitation	83.0 mm (3.3 in)	52 of 100 (Notable)
Muyinga	Burundi	Record daily precipitation	37.0 mm (1.5 in)	52 of 100 (Notable)
Cuimato	Mexico	Record daily precipitation	49.3 mm (1.9 in)	51 of 100 (Notable)
Abilene	United States	Record low minimum temperature	-5.0 C (23.0 F)	48 of 100 (Notable)
Nellore	India	Record daily precipitation	71.1 mm (2.8 in)	47 of 100 (Notable)
McPherson	United States	Record low minimum temperature	-2.8 C (27.0 F)	46 of 100 (Notable)
Beaver	United States	Record low minimum temperature	-2.8 C (27.0 F)	46 of 100 (Notable)
Weert	Netherlands	Record daily precipitation	27.1 mm (1.1 in)	45 of 100 (Notable)
Kingman	United States	Record low minimum temperature	-4.4 C (24.1 F)	45 of 100 (Notable)
Elk City 4 W	United States	Record low minimum temperature	-2.2 C (28.0 F)	45 of 100 (Notable)
Jefferson 3SE	United States	Record low minimum temperature	-2.8 C (27.0 F)	44 of 100 (Notable)
Greensburg	United States	Record low minimum temperature	-5.0 C (23.0 F)	43 of 100 (Notable)
Blanco	United States	Record low maximum temperature	16.1 C (61.0 F)	43 of 100 (Notable)
Burnet	United States	Record low maximum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
New Braunfels	United States	Record low maximum temperature	18.3 C (64.9 F)	43 of 100 (Notable)
Clarendon	United States	Record low minimum temperature	-1.1 C (30.0 F)	43 of 100 (Notable)
Pratt 3NW	United States	Record low minimum temperature	-3.3 C (26.1 F)	42 of 100 (Notable)
Wellington	United States	Record low minimum temperature	-2.2 C (28.0 F)	42 of 100 (Notable)
Carnegie 5 NE	United States	Record low minimum temperature	-3.3 C (26.1 F)	42 of 100 (Notable)
Enid	United States	Record low minimum temperature	1.1 C (34.0 F)	42 of 100 (Notable)
Miami	United States	Record low minimum temperature	-2.2 C (28.0 F)	42 of 100 (Notable)
Scott City	United States	Record low minimum temperature	-5.0 C (23.0 F)	41 of 100 (Notable)
Versailles	United States	Record low minimum temperature	-1.1 C (30.0 F)	41 of 100 (Notable)
Southport 5 N	United States	Record daily precipitation	139.7 mm (5.5 in)	41 of 100 (Notable)
Ft Lauderdale	United States	Record low maximum temperature	24.4 C (75.9 F)	40 of 100 (Notable)
Independence	United States	Record low minimum temperature	-1.7 C (28.9 F)	40 of 100 (Notable)
Kinston 7 SE	United States	Record low maximum temperature	15.0 C (59.0 F)	40 of 100 (Notable)
Buffalo 2 SSW	United States	Record low minimum temperature	-3.3 C (26.1 F)	40 of 100 (Notable)
Hennessey 4 ESE	United States	Record low minimum temperature	0.0 C (32.0 F)	40 of 100 (Notable)
Ft Pierce	United States	Record low maximum temperature	24.4 C (75.9 F)	39 of 100 (Notable)
El Dorado	United States	Record low minimum temperature	-2.2 C (28.0 F)	39 of 100 (Notable)
Ellsworth	United States	Record low minimum temperature	-4.4 C (24.1 F)	39 of 100 (Notable)
Healy	United States	Record low minimum temperature	-4.4 C (24.1 F)	39 of 100 (Notable)
Boerne	United States	Record low maximum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
Lampasas	United States	Record low maximum temperature	16.1 C (61.0 F)	39 of 100 (Notable)
Bedford	United States	Record low maximum temperature	12.8 C (55.0 F)	39 of 100 (Notable)
Mt Ida 3 SE	United States	Record low maximum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Washington	United States	Record low minimum temperature	-2.8 C (27.0 F)	38 of 100 (Notable)
Aurora	United States	Record low minimum temperature	-3.9 C (25.0 F)	38 of 100 (Notable)
Beaver City	United States	Record low minimum temperature	-7.8 C (18.0 F)	38 of 100 (Notable)
Bowling Green Warren Co AP	United States	Record low maximum temperature	12.8 C (55.0 F)	38 of 100 (Notable)
Fordyce	United States	Record low maximum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Madison Sewage Plt	United States	Record low maximum temperature	12.8 C (55.0 F)	37 of 100 (Notable)
Chariton 1 E	United States	Record low minimum temperature	-3.9 C (25.0 F)	37 of 100 (Notable)
Eureka 1E	United States	Record low minimum temperature	-2.2 C (28.0 F)	37 of 100 (Notable)
Larned	United States	Record low minimum temperature	-3.3 C (26.1 F)	37 of 100 (Notable)
Richfield	United States	Record low maximum temperature	8.9 C (48.0 F)	37 of 100 (Notable)
Lamar 7N	United States	Record low maximum temperature	13.9 C (57.0 F)	37 of 100 (Notable)
St Charles Elm Pt	United States	Record low maximum temperature	12.8 C (55.0 F)	37 of 100 (Notable)
Trenton	United States	Record low minimum temperature	-1.7 C (28.9 F)	37 of 100 (Notable)
Crete 4ESE	United States	Record low minimum temperature	-2.8 C (27.0 F)	37 of 100 (Notable)
Gothenburg	United States	Record low minimum temperature	-6.7 C (19.9 F)	37 of 100 (Notable)
Clovis	United States	Record low maximum temperature	7.8 C (46.0 F)	37 of 100 (Notable)
Ft Sumner	United States	Record low maximum temperature	7.2 C (45.0 F)	37 of 100 (Notable)
Harlingen	United States	Record low maximum temperature	19.4 C (66.9 F)	37 of 100 (Notable)
Miami	United States	Record low maximum temperature	7.2 C (45.0 F)	37 of 100 (Notable)
Quanah 2 SW	United States	Record low maximum temperature	10.0 C (50.0 F)	37 of 100 (Notable)
Lamar	United States	Record low minimum temperature	-2.8 C (27.0 F)	36 of 100 (Notable)

Counts by Type and Timescale

1,267 records

Records set or tied on 30 September 1984 by type: Highest daily maximum 40, Lowest daily maximum 475, Highest daily minimum 33, Lowest daily minimum 571, Heaviest daily rainfall 145, Deepest snow cover 3.

Records on 30 September 1984 by type
Record type	Records
Highest daily maximum	40
Lowest daily maximum	475
Highest daily minimum	33
Lowest daily minimum	571
Heaviest daily rainfall	145
Heaviest daily snowfall	0
Deepest snow cover	3

Records on 30 September 1984 by timescale: all-time 0, monthly 253, daily 1,014.

How Much Records Were Beaten By

982 broken records

Margins by which the 982 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 98.8. Ties are not counted.

Top 20 by Significance

30 September 1984

Top 20 records on 30 September 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1984	Madras/Minambakkam, IN	monthly rain	198.9 mm (7.8 in)	98.8 mm (3.9 in)	60 years	76 of 100 (Major)
30 September 1984	Pte de Chassiron, FR	daily rain	42.8 mm (1.7 in)	27.0 mm (1.1 in)	60 years	66 of 100 (Major)
30 September 1984	Sao Joao de Petropolis, BR	monthly rain	83.0 mm (3.3 in)	28.8 mm (1.1 in)	9 years	52 of 100 (Notable)
30 September 1984	Muyinga, BI	daily rain	37.0 mm (1.5 in)	29.6 mm (1.2 in)	32 years	52 of 100 (Notable)
30 September 1984	Cuimato, MX	daily rain	49.3 mm (1.9 in)	41.4 mm (1.6 in)	29 years	51 of 100 (Notable)
30 September 1984	Abilene, US	monthly low min	-5.0 C (23.0 F)	1.7 C (3.1 F)	88 years	48 of 100 (Notable)
30 September 1984	Nellore, IN	daily rain	71.1 mm (2.8 in)	35.0 mm (1.4 in)	67 years	47 of 100 (Notable)
30 September 1984	McPherson, US	monthly low min	-2.8 C (27.0 F)	0.6 C (1.1 F)	88 years	46 of 100 (Notable)
30 September 1984	Beaver, US	monthly low min	-2.8 C (27.0 F)	1.1 C (2.0 F)	88 years	46 of 100 (Notable)
30 September 1984	Weert, NL	daily rain	27.1 mm (1.1 in)	16.1 mm (0.6 in)	28 years	45 of 100 (Notable)
30 September 1984	Kingman, US	monthly low min	-4.4 C (24.1 F)	3.8 C (6.8 F)	72 years	45 of 100 (Notable)
30 September 1984	Elk City 4 W, US	monthly low min	-2.2 C (28.0 F)	2.8 C (5.0 F)	72 years	45 of 100 (Notable)
30 September 1984	Jefferson 3SE, US	monthly low min	-2.8 C (27.0 F)	2.2 C (4.0 F)	72 years	44 of 100 (Notable)
30 September 1984	Greensburg, US	monthly low min	-5.0 C (23.0 F)	2.8 C (5.0 F)	66 years	43 of 100 (Notable)
30 September 1984	Blanco, US	daily low max	16.1 C (61.0 F)	5.6 C (10.1 F)	75 years	43 of 100 (Notable)
30 September 1984	Burnet, US	daily low max	15.6 C (60.1 F)	6.1 C (11.0 F)	68 years	43 of 100 (Notable)
30 September 1984	New Braunfels, US	daily low max	18.3 C (64.9 F)	2.8 C (5.0 F)	88 years	43 of 100 (Notable)
30 September 1984	Clarendon, US	monthly low min	-1.1 C (30.0 F)	1.7 C (3.1 F)	72 years	43 of 100 (Notable)
30 September 1984	Pratt 3NW, US	monthly low min	-3.3 C (26.1 F)	2.2 C (4.0 F)	66 years	42 of 100 (Notable)
30 September 1984	Wellington, US	monthly low min	-2.2 C (28.0 F)	1.1 C (2.0 F)	72 years	42 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

1806 to 1984

Records set or tied on this calendar date in each year from 1806 to 1984. 1984 had 1,267 records.

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

Records on 09-30 in each year
Year	Records
1806	1
1813	1
1817	1
1819	2
1834	1
1841	1
1842	1
1847	1
1853	1
1854	1
1855	1
1861	1
1862	1
1866	1
1868	2
1869	3
1870	1
1874	1
1877	1
1878	1
1881	5
1883	2
1885	1
1886	3
1887	1
1888	4
1889	1
1892	2
1893	3
1894	8
1895	5
1896	2
1897	3
1898	3
1899	12
1900	4
1901	11
1902	7
1903	9
1904	14
1905	25
1906	14
1907	16
1908	18
1909	10
1910	5
1911	47
1912	47
1913	10
1914	33
1915	84
1916	209
1917	19
1918	45
1919	28
1920	71
1921	61
1922	71
1923	183
1924	243
1925	211
1926	194
1927	486
1928	560
1929	181
1930	110
1931	225
1932	363
1933	437
1934	398
1935	209
1936	432
1937	417
1938	428
1939	371
1940	316
1941	482
1942	405
1943	404
1944	369
1945	889
1946	320
1947	433
1948	267
1949	366
1950	731
1951	597
1952	504
1953	1,136
1954	1,059
1955	406
1956	350
1957	663
1958	442
1959	1,159
1960	161
1961	618
1962	202
1963	818
1964	332
1965	459
1966	592
1967	859
1968	449
1969	465
1970	334
1971	1,359
1972	676
1973	407
1974	742
1975	686
1976	775
1977	870
1978	399
1979	479
1980	832
1981	688
1982	806
1983	1,102
1984	1,267
1985	1,892
1986	1,805
1987	649
1988	453
1989	713
1990	665
1991	949
1992	980
1993	988
1994	816
1995	1,061
1996	1,396
1997	729
1998	1,206
1999	1,144
2000	887
2001	699
2002	677
2003	1,079
2004	573
2005	761
2006	617
2007	841
2008	585
2009	826
2010	1,059
2011	1,258
2012	637
2013	634
2014	529
2015	997
2016	746
2017	404
2018	717
2019	2,192
2020	554
2021	823
2022	563
2023	1,012
2024	948
2025	559
2026	529

Download the Data

Data for records on 1984-09-30: 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	970
20 to 40	8
40 to 60	3
60 to 80	0
80 to 100	1