Weather Records on 20 September 1974

771 weather records were set or tied worldwide on 20 September 1974. Highest significance: Lyrup, AU.

Key Facts for 20 September 1974

On 20 September 1974, 771 weather records were set or tied at long-record stations worldwide.
162 were record highs and 51 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 17 monthly and 751 daily.
Lyrup set a daily record precipitation of 35.5 mm (1.4 in) on 20 September 1974.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 440 records.

Record Map

771 stations

771 station records on 20 September 1974 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1974: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lyrup	Australia	Record daily precipitation	35.5 mm (1.4 in)	66 of 100 (Major)
Balranald (Tillara)	Australia	Record daily precipitation	32.6 mm (1.3 in)	64 of 100 (Major)
Mount Christie (Tar 397 Mile)	Australia	Record daily precipitation	28.0 mm (1.1 in)	62 of 100 (Major)
Hvar	Croatia	Record daily precipitation	69.7 mm (2.7 in)	62 of 100 (Major)
Kilauea 1134	United States	Record daily precipitation	63.2 mm (2.5 in)	62 of 100 (Major)
Lihue 1020	United States	Record daily precipitation	56.1 mm (2.2 in)	62 of 100 (Major)
Tenango de Doria	Mexico	Record daily precipitation	279.9 mm (11.0 in)	61 of 100 (Major)
Cockburn	Australia	Record daily precipitation	26.0 mm (1.0 in)	59 of 100 (Notable)
Lake Dismal	Australia	Record daily precipitation	28.0 mm (1.1 in)	59 of 100 (Notable)
Bannerton	Australia	Record daily precipitation	29.5 mm (1.2 in)	59 of 100 (Notable)
Pirlta	Australia	Record daily precipitation	29.0 mm (1.1 in)	59 of 100 (Notable)
Halaula 1110	United States	Record daily precipitation	45.7 mm (1.8 in)	58 of 100 (Notable)
Silverton Post Office	Australia	Record daily precipitation	28.2 mm (1.1 in)	57 of 100 (Notable)
Cramenton	Australia	Record daily precipitation	27.0 mm (1.1 in)	56 of 100 (Notable)
Willah	Australia	Record daily precipitation	27.0 mm (1.1 in)	56 of 100 (Notable)
Rushworth	Australia	Record daily precipitation	28.4 mm (1.1 in)	55 of 100 (Notable)
Pooncarie Mail Agency	Australia	Record daily precipitation	25.4 mm (1.0 in)	54 of 100 (Notable)
Pooncarie (Moorara)	Australia	Record daily precipitation	28.0 mm (1.1 in)	53 of 100 (Notable)
Teziutlan	Mexico	Record daily precipitation	309.9 mm (12.2 in)	52 of 100 (Notable)
Okeene	United States	Record daily precipitation	128.5 mm (5.1 in)	52 of 100 (Notable)
Gabyon	Australia	Record daily precipitation	28.0 mm (1.1 in)	51 of 100 (Notable)
Umberumberka Reservoir	Australia	Record daily precipitation	27.4 mm (1.1 in)	50 of 100 (Notable)
Manangatang	Australia	Record daily precipitation	27.0 mm (1.1 in)	50 of 100 (Notable)
Tlanchinol (Smn)	Mexico	Record daily precipitation	322.8 mm (12.7 in)	50 of 100 (Notable)
Tlaxco	Mexico	Record daily precipitation	74.2 mm (2.9 in)	50 of 100 (Notable)
Nopalapan	Mexico	Record daily precipitation	299.0 mm (11.8 in)	50 of 100 (Notable)
Kealia 1112	United States	Record daily precipitation	38.1 mm (1.5 in)	50 of 100 (Notable)
Winnambool (Kulwin)	Australia	Record daily precipitation	34.4 mm (1.4 in)	49 of 100 (Notable)
Juarez (Smn)	Mexico	Record daily precipitation	47.5 mm (1.9 in)	49 of 100 (Notable)
Teotitlan del Camino (Smn)	Mexico	Record daily precipitation	74.9 mm (2.9 in)	49 of 100 (Notable)
Huauchinango	Mexico	Record daily precipitation	149.9 mm (5.9 in)	49 of 100 (Notable)
Apache Powder Company	United States	Record daily precipitation	30.7 mm (1.2 in)	49 of 100 (Notable)
Haysdale	Australia	Record daily precipitation	30.1 mm (1.2 in)	48 of 100 (Notable)
Kurnwill	Australia	Record daily precipitation	30.8 mm (1.2 in)	48 of 100 (Notable)
Nulkwyne Kiamal	Australia	Record daily precipitation	32.0 mm (1.3 in)	48 of 100 (Notable)
Renmark Irrigation	Australia	Record daily precipitation	29.2 mm (1.1 in)	47 of 100 (Notable)
Annuello	Australia	Record daily precipitation	28.4 mm (1.1 in)	47 of 100 (Notable)
Red Cliffs (Post Office)	Australia	Record daily precipitation	27.0 mm (1.1 in)	47 of 100 (Notable)
Soledad de Doblado	Mexico	Record daily precipitation	159.8 mm (6.3 in)	47 of 100 (Notable)
Xicotepec de Juarez	Mexico	Record daily precipitation	240.3 mm (9.5 in)	46 of 100 (Notable)
Odell 2 N	United States	Record daily precipitation	89.4 mm (3.5 in)	46 of 100 (Notable)
McCamey	United States	Record daily precipitation	99.1 mm (3.9 in)	46 of 100 (Notable)
Wanganella (Bundyulumblah)	Australia	Record daily precipitation	28.0 mm (1.1 in)	45 of 100 (Notable)
Werrimull	Australia	Record daily precipitation	27.0 mm (1.1 in)	45 of 100 (Notable)
Pryor	United States	Record daily precipitation	94.0 mm (3.7 in)	45 of 100 (Notable)
Conargo Post Office	Australia	Record daily precipitation	26.4 mm (1.0 in)	44 of 100 (Notable)
Usina de Varginha	Brazil	Record daily precipitation	40.0 mm (1.6 in)	44 of 100 (Notable)
Boolcoomatta	Australia	Record daily precipitation	25.0 mm (1.0 in)	43 of 100 (Notable)
Hay (Pevensey)	Australia	Record daily precipitation	25.4 mm (1.0 in)	43 of 100 (Notable)
Ft Smith Wtp	United States	Record daily precipitation	89.4 mm (3.5 in)	42 of 100 (Notable)
Irymple (Arlington)	Australia	Record daily precipitation	25.8 mm (1.0 in)	41 of 100 (Notable)
Lead Hill	United States	Record daily precipitation	67.3 mm (2.6 in)	41 of 100 (Notable)
Perry	United States	Record daily precipitation	86.4 mm (3.4 in)	41 of 100 (Notable)
Alpine	United States	Record daily precipitation	47.2 mm (1.9 in)	41 of 100 (Notable)
Conargo (Willurah)	Australia	Record daily precipitation	28.8 mm (1.1 in)	40 of 100 (Notable)
Tezontepec (Smn)	Mexico	Record daily precipitation	41.9 mm (1.6 in)	40 of 100 (Notable)
Atzalan	Mexico	Record daily precipitation	262.9 mm (10.4 in)	40 of 100 (Notable)
Cassville 1 NE	United States	Record daily precipitation	43.2 mm (1.7 in)	40 of 100 (Notable)
McAlester Rgnl AP	United States	Record daily precipitation	106.9 mm (4.2 in)	40 of 100 (Notable)
Wentworth (Burtundy)	Australia	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)

Counts by Type and Timescale

771 records

Records set or tied on 20 September 1974 by type: Highest daily maximum 111, Lowest daily maximum 38, Highest daily minimum 51, Lowest daily minimum 13, Heaviest daily rainfall 555, Heaviest daily snowfall 3.

Records on 20 September 1974 by type
Record type	Records
Highest daily maximum	111
Lowest daily maximum	38
Highest daily minimum	51
Lowest daily minimum	13
Heaviest daily rainfall	555
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 20 September 1974 by timescale: all-time 3, monthly 17, daily 751.

How Much Records Were Beaten By

681 broken records

Margins by which the 681 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 262.9. Ties are not counted.

Top 20 by Significance

20 September 1974

Top 20 records on 20 September 1974 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1974	Lyrup, AU	daily rain	35.5 mm (1.4 in)	30.2 mm (1.2 in)	73 years	66 of 100 (Major)
20 September 1974	Balranald (Tillara), AU	daily rain	32.6 mm (1.3 in)	22.9 mm (0.9 in)	59 years	64 of 100 (Major)
20 September 1974	Mount Christie (Tar 397 Mile), AU	daily rain	28.0 mm (1.1 in)	26.2 mm (1.0 in)	56 years	62 of 100 (Major)
20 September 1974	Hvar, HR	daily rain	69.7 mm (2.7 in)	35.4 mm (1.4 in)	93 years	62 of 100 (Major)
20 September 1974	Kilauea 1134, US	daily rain	63.2 mm (2.5 in)	45.2 mm (1.8 in)	51 years	62 of 100 (Major)
20 September 1974	Lihue 1020, US	daily rain	56.1 mm (2.2 in)	45.7 mm (1.8 in)	60 years	62 of 100 (Major)
20 September 1974	Tenango de Doria, MX	all-time rain	279.9 mm (11.0 in)	69.1 mm (2.7 in)	29 years	61 of 100 (Major)
20 September 1974	Cockburn, AU	daily rain	26.0 mm (1.0 in)	22.2 mm (0.9 in)	49 years	59 of 100 (Notable)
20 September 1974	Lake Dismal, AU	daily rain	28.0 mm (1.1 in)	28.0 mm (1.1 in)	48 years	59 of 100 (Notable)
20 September 1974	Bannerton, AU	daily rain	29.5 mm (1.2 in)	22.1 mm (0.9 in)	49 years	59 of 100 (Notable)
20 September 1974	Pirlta, AU	daily rain	29.0 mm (1.1 in)	21.1 mm (0.8 in)	49 years	59 of 100 (Notable)
20 September 1974	Halaula 1110, US	daily rain	45.7 mm (1.8 in)	33.0 mm (1.3 in)	60 years	58 of 100 (Notable)
20 September 1974	Silverton Post Office, AU	daily rain	28.2 mm (1.1 in)	18.0 mm (0.7 in)	85 years	57 of 100 (Notable)
20 September 1974	Cramenton, AU	daily rain	27.0 mm (1.1 in)	23.7 mm (0.9 in)	40 years	56 of 100 (Notable)
20 September 1974	Willah, AU	daily rain	27.0 mm (1.1 in)	22.4 mm (0.9 in)	40 years	56 of 100 (Notable)
20 September 1974	Rushworth, AU	daily rain	28.4 mm (1.1 in)	19.3 mm (0.8 in)	60 years	55 of 100 (Notable)
20 September 1974	Pooncarie Mail Agency, AU	daily rain	25.4 mm (1.0 in)	19.8 mm (0.8 in)	49 years	54 of 100 (Notable)
20 September 1974	Pooncarie (Moorara), AU	daily rain	28.0 mm (1.1 in)	13.3 mm (0.5 in)	82 years	53 of 100 (Notable)
20 September 1974	Teziutlan, MX	daily rain	309.9 mm (12.2 in)	233.4 mm (9.2 in)	24 years	52 of 100 (Notable)
20 September 1974	Okeene, US	monthly rain	128.5 mm (5.1 in)	49.8 mm (2.0 in)	3 years	52 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

1812 to 1974

Records set or tied on this calendar date in each year from 1812 to 1974. 1974 had 771 records.

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

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 1974-09-20: 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 50	660
50 to 100	16
100 to 150	1
150 to 200	1
200 to 250	2
250 to 300	1