Weather Records on 27 September 1979

741 weather records were set or tied worldwide on 27 September 1979. Highest significance: Mount Wedge, AU.

Key Facts for 27 September 1979

On 27 September 1979, 741 weather records were set or tied at long-record stations worldwide.
269 were record highs and 163 were record lows, counting maximum and minimum temperature.
By timescale, 6 were all-time records, 111 monthly and 624 daily.
Mount Wedge set a monthly record daily precipitation of 56.0 mm (2.2 in) on 27 September 1979.
Across 154 earlier years (1799 to 2026) the same calendar date averaged 449 records.

Record Map

741 stations

741 station records on 27 September 1979 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 September 1979: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mount Wedge	Australia	Record daily precipitation	56.0 mm (2.2 in)	87 of 100 (Exceptional)
Port Pirie Nyrstar Comparison	Australia	Record daily precipitation	76.2 mm (3.0 in)	81 of 100 (Exceptional)
Roopena	Australia	Record daily precipitation	70.0 mm (2.8 in)	78 of 100 (Major)
Yacka	Australia	Record daily precipitation	63.0 mm (2.5 in)	77 of 100 (Major)
Whyalla (Norrie)	Australia	Record daily precipitation	62.4 mm (2.5 in)	75 of 100 (Major)
Port Germein (Telowie)	Australia	Record daily precipitation	69.0 mm (2.7 in)	75 of 100 (Major)
Iron Knob	Australia	Record daily precipitation	89.0 mm (3.5 in)	74 of 100 (Major)
Yardea	Australia	Record daily precipitation	61.2 mm (2.4 in)	73 of 100 (Major)
Laura	Australia	Record daily precipitation	63.2 mm (2.5 in)	71 of 100 (Major)
Tumby Bay (Warratta Vale)	Australia	Record daily precipitation	44.6 mm (1.8 in)	70 of 100 (Major)
Streaky Bay	Australia	Record daily precipitation	28.6 mm (1.1 in)	69 of 100 (Major)
Terowie	Australia	Record daily precipitation	43.0 mm (1.7 in)	69 of 100 (Major)
Lock (Terre)	Australia	Record daily precipitation	55.0 mm (2.2 in)	68 of 100 (Major)
Port Kenny (Mount Cooper)	Australia	Record daily precipitation	72.0 mm (2.8 in)	66 of 100 (Major)
Whyalla (Mullaquana)	Australia	Record daily precipitation	52.0 mm (2.0 in)	66 of 100 (Major)
Wirrabara	Australia	Record daily precipitation	50.4 mm (2.0 in)	65 of 100 (Major)
Hallett	Australia	Record daily precipitation	66.6 mm (2.6 in)	65 of 100 (Major)
Moonta	Australia	Record daily precipitation	31.8 mm (1.3 in)	65 of 100 (Major)
Appila	Australia	Record daily precipitation	53.8 mm (2.1 in)	64 of 100 (Major)
Hallett (Old Canowie)	Australia	Record daily precipitation	53.4 mm (2.1 in)	63 of 100 (Major)
Yeelanna	Australia	Record daily precipitation	30.0 mm (1.2 in)	62 of 100 (Major)
Mulyungarie	Australia	Record daily precipitation	58.0 mm (2.3 in)	62 of 100 (Major)
Koolunga	Australia	Record daily precipitation	41.8 mm (1.6 in)	62 of 100 (Major)
Karcultaby	Australia	Record daily precipitation	31.2 mm (1.2 in)	61 of 100 (Major)
Warramboo	Australia	Record daily precipitation	30.8 mm (1.2 in)	61 of 100 (Major)
Georgetown	Australia	Record daily precipitation	65.0 mm (2.6 in)	61 of 100 (Major)
Wallaroo	Australia	Record daily precipitation	32.0 mm (1.3 in)	61 of 100 (Major)
Moonaree	Australia	Record daily precipitation	58.2 mm (2.3 in)	59 of 100 (Notable)
Nonning	Australia	Record daily precipitation	46.4 mm (1.8 in)	59 of 100 (Notable)
Iron Knob (Gilles Downs)	Australia	Record daily precipitation	60.0 mm (2.4 in)	59 of 100 (Notable)
Kielpa	Australia	Record daily precipitation	27.4 mm (1.1 in)	59 of 100 (Notable)
Wirrulla	Australia	Record daily precipitation	48.0 mm (1.9 in)	59 of 100 (Notable)
Farrell Flat	Australia	Record daily precipitation	57.0 mm (2.2 in)	59 of 100 (Notable)
Whyalla (Nonowie)	Australia	Record daily precipitation	66.0 mm (2.6 in)	58 of 100 (Notable)
Port Germein	Australia	Record daily precipitation	52.4 mm (2.1 in)	58 of 100 (Notable)
Wirrabara Forest	Australia	Record daily precipitation	53.6 mm (2.1 in)	58 of 100 (Notable)
Booborowie	Australia	Record daily precipitation	70.8 mm (2.8 in)	58 of 100 (Notable)
Caltowie	Australia	Record daily precipitation	62.2 mm (2.4 in)	58 of 100 (Notable)
Gladstone	Australia	Record daily precipitation	58.2 mm (2.3 in)	58 of 100 (Notable)
Bower	Australia	Record daily precipitation	44.5 mm (1.8 in)	58 of 100 (Notable)
Minnipa	Australia	Record daily precipitation	31.3 mm (1.2 in)	57 of 100 (Notable)
Marquard - Pol 29	South Africa	Record daily precipitation	60.0 mm (2.4 in)	56 of 100 (Notable)
Whyalla (Broadview)	Australia	Record daily precipitation	64.3 mm (2.5 in)	55 of 100 (Notable)
Burra (Basin Farm)	Australia	Record daily precipitation	68.6 mm (2.7 in)	55 of 100 (Notable)
Ungarra	Australia	Record daily precipitation	56.0 mm (2.2 in)	54 of 100 (Notable)
Beetaloo Reservoir Old Site	Australia	Record daily precipitation	78.6 mm (3.1 in)	54 of 100 (Notable)
Kimba (Cortlinye Rocks STN)	Australia	Record daily precipitation	42.4 mm (1.7 in)	53 of 100 (Notable)
Kimba	Australia	Record daily precipitation	33.0 mm (1.3 in)	53 of 100 (Notable)
Murray Town (Doughboy Creek)	Australia	Record daily precipitation	44.0 mm (1.7 in)	53 of 100 (Notable)
Paskeville	Australia	Record daily precipitation	33.0 mm (1.3 in)	53 of 100 (Notable)
Minyip (Post Office)	Australia	Record daily precipitation	43.0 mm (1.7 in)	53 of 100 (Notable)
Hallett (Lorraine)	Australia	Record daily precipitation	72.0 mm (2.8 in)	52 of 100 (Notable)
White Cliffs (Kayrunnera)	Australia	Record daily precipitation	36.2 mm (1.4 in)	52 of 100 (Notable)
Port Augusta (Carriewerloo STN	Australia	Record daily precipitation	40.0 mm (1.6 in)	51 of 100 (Notable)
Tarcoola (Lake Everard)	Australia	Record daily precipitation	56.0 mm (2.2 in)	51 of 100 (Notable)
Buckleboo (Buclkeboo Post Offi	Australia	Record daily precipitation	41.5 mm (1.6 in)	51 of 100 (Notable)
Port Neill	Australia	Record daily precipitation	27.0 mm (1.1 in)	50 of 100 (Notable)
Spalding	Australia	Record daily precipitation	63.6 mm (2.5 in)	50 of 100 (Notable)
Point Pass	Australia	Record daily precipitation	38.8 mm (1.5 in)	50 of 100 (Notable)
Mount Bryan	Australia	Record daily precipitation	62.4 mm (2.5 in)	49 of 100 (Notable)

Counts by Type and Timescale

741 records

Records set or tied on 27 September 1979 by type: Highest daily maximum 78, Lowest daily maximum 30, Highest daily minimum 191, Lowest daily minimum 133, Heaviest daily rainfall 308, Heaviest daily snowfall 1.

Records on 27 September 1979 by type
Record type	Records
Highest daily maximum	78
Lowest daily maximum	30
Highest daily minimum	191
Lowest daily minimum	133
Heaviest daily rainfall	308
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 27 September 1979 by timescale: all-time 6, monthly 111, daily 624.

How Much Records Were Beaten By

624 broken records

Margins by which the 624 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 71.7. Ties are not counted.

Top 20 by Significance

27 September 1979

Top 20 records on 27 September 1979 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 September 1979	Mount Wedge, AU	monthly rain	56.0 mm (2.2 in)	22.7 mm (0.9 in)	95 years	87 of 100 (Exceptional)
27 September 1979	Port Pirie Nyrstar Comparison, AU	monthly rain	76.2 mm (3.0 in)	37.3 mm (1.5 in)	71 years	81 of 100 (Exceptional)
27 September 1979	Roopena, AU	monthly rain	70.0 mm (2.8 in)	28.3 mm (1.1 in)	69 years	78 of 100 (Major)
27 September 1979	Yacka, AU	monthly rain	63.0 mm (2.5 in)	20.1 mm (0.8 in)	71 years	77 of 100 (Major)
27 September 1979	Whyalla (Norrie), AU	monthly rain	62.4 mm (2.5 in)	29.4 mm (1.2 in)	62 years	75 of 100 (Major)
27 September 1979	Port Germein (Telowie), AU	monthly rain	69.0 mm (2.7 in)	20.7 mm (0.8 in)	69 years	75 of 100 (Major)
27 September 1979	Iron Knob, AU	monthly rain	89.0 mm (3.5 in)	58.5 mm (2.3 in)	62 years	74 of 100 (Major)
27 September 1979	Yardea, AU	monthly rain	61.2 mm (2.4 in)	16.2 mm (0.6 in)	87 years	73 of 100 (Major)
27 September 1979	Laura, AU	daily rain	63.2 mm (2.5 in)	37.3 mm (1.5 in)	72 years	71 of 100 (Major)
27 September 1979	Tumby Bay (Warratta Vale), AU	monthly rain	44.6 mm (1.8 in)	10.8 mm (0.4 in)	95 years	70 of 100 (Major)
27 September 1979	Streaky Bay, AU	daily rain	28.6 mm (1.1 in)	17.7 mm (0.7 in)	72 years	69 of 100 (Major)
27 September 1979	Terowie, AU	daily rain	43.0 mm (1.7 in)	21.4 mm (0.8 in)	72 years	69 of 100 (Major)
27 September 1979	Lock (Terre), AU	monthly rain	55.0 mm (2.2 in)	28.8 mm (1.1 in)	38 years	68 of 100 (Major)
27 September 1979	Port Kenny (Mount Cooper), AU	all-time rain	72.0 mm (2.8 in)	20.9 mm (0.8 in)	8 years	66 of 100 (Major)
27 September 1979	Whyalla (Mullaquana), AU	monthly rain	52.0 mm (2.0 in)	21.5 mm (0.8 in)	30 years	66 of 100 (Major)
27 September 1979	Wirrabara, AU	daily rain	50.4 mm (2.0 in)	23.7 mm (0.9 in)	72 years	65 of 100 (Major)
27 September 1979	Hallett, AU	monthly rain	66.6 mm (2.6 in)	14.0 mm (0.6 in)	76 years	65 of 100 (Major)
27 September 1979	Moonta, AU	daily rain	31.8 mm (1.3 in)	16.6 mm (0.7 in)	72 years	65 of 100 (Major)
27 September 1979	Appila, AU	monthly rain	53.8 mm (2.1 in)	12.9 mm (0.5 in)	71 years	64 of 100 (Major)
27 September 1979	Hallett (Old Canowie), AU	daily rain	53.4 mm (2.1 in)	23.9 mm (0.9 in)	72 years	63 of 100 (Major)

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

1799 to 1979

Records set or tied on this calendar date in each year from 1799 to 1979. 1979 had 741 records.

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

Records on 09-27 in each year
Year	Records
1799	1
1828	1
1836	2
1847	1
1851	1
1854	2
1855	2
1859	2
1866	2
1867	3
1874	1
1875	1
1877	2
1880	1
1881	4
1882	1
1885	5
1887	1
1890	3
1891	1
1892	1
1893	1
1894	5
1895	6
1896	1
1897	2
1898	4
1899	1
1900	5
1901	3
1902	12
1903	7
1904	12
1905	21
1906	21
1907	9
1908	36
1909	17
1910	20
1911	31
1912	25
1913	27
1914	24
1915	80
1916	57
1917	41
1918	58
1919	45
1920	54
1921	26
1922	111
1923	125
1924	115
1925	129
1926	581
1927	244
1928	288
1929	225
1930	178
1931	222
1932	194
1933	559
1934	298
1935	319
1936	435
1937	309
1938	366
1939	572
1940	706
1941	257
1942	1,353
1943	503
1944	323
1945	475
1946	387
1947	813
1948	405
1949	407
1950	223
1951	480
1952	539
1953	567
1954	507
1955	386
1956	825
1957	644
1958	585
1959	582
1960	337
1961	376
1962	352
1963	849
1964	724
1965	688
1966	426
1967	502
1968	286
1969	233
1970	773
1971	762
1972	989
1973	1,031
1974	408
1975	790
1976	905
1977	852
1978	773
1979	741
1980	559
1981	680
1982	1,076
1983	791
1984	1,297
1985	661
1986	1,772
1987	1,013
1988	494
1989	852
1990	379
1991	894
1992	659
1993	727
1994	764
1995	698
1996	1,468
1997	730
1998	1,774
1999	1,059
2000	1,031
2001	980
2002	992
2003	830
2004	665
2005	1,061
2006	596
2007	1,091
2008	659
2009	987
2010	1,153
2011	965
2012	625
2013	823
2014	813
2015	664
2016	600
2017	891
2018	600
2019	755
2020	659
2021	893
2022	642
2023	747
2024	1,449
2025	270
2026	348

Download the Data

Data for records on 1979-09-27: 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 10	499
10 to 20	75
20 to 30	34
30 to 40	7
40 to 50	4
50 to 60	2
60 to 70	2
70 to 80	1