Weather Records on 18 April 1974

326 weather records were set or tied worldwide on 18 April 1974. Highest significance: Orroroo (Black Rock), AU.

Key Facts for 18 April 1974

On 18 April 1974, 326 weather records were set or tied at long-record stations worldwide.
43 were record highs and 76 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 8 monthly and 318 daily.
Orroroo (Black Rock) set a monthly record daily precipitation of 48.0 mm (1.9 in) on 18 April 1974.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 468 records.

Record Map

326 stations

326 station records on 18 April 1974 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1974: highest significance records shown on the map
Station	Country	Type	Value	Significance
Orroroo (Black Rock)	Australia	Record daily precipitation	48.0 mm (1.9 in)	64 of 100 (Major)
Nappa Merrie	Australia	Record daily precipitation	46.4 mm (1.8 in)	57 of 100 (Notable)
Pianco	Brazil	Record daily precipitation	103.0 mm (4.1 in)	57 of 100 (Notable)
Maneroo	Australia	Record daily precipitation	49.4 mm (1.9 in)	52 of 100 (Notable)
Tapera	Brazil	Record daily precipitation	108.3 mm (4.3 in)	51 of 100 (Notable)
Oondooroo	Australia	Record daily precipitation	59.0 mm (2.3 in)	50 of 100 (Notable)
Petrolandia (Itaparica)	Brazil	Record daily precipitation	60.6 mm (2.4 in)	50 of 100 (Notable)
Kainaliu 73.2	United States	Record daily precipitation	89.9 mm (3.5 in)	50 of 100 (Notable)
Beltana	Australia	Record daily precipitation	38.0 mm (1.5 in)	48 of 100 (Notable)
Beltana Station	Australia	Record daily precipitation	34.0 mm (1.3 in)	45 of 100 (Notable)
Barra de Santa Rosa	Brazil	Record daily precipitation	83.0 mm (3.3 in)	44 of 100 (Notable)
Broken Hill (Lintiss Vale)	Australia	Record daily precipitation	37.0 mm (1.5 in)	43 of 100 (Notable)
Chakola (Umeralla)	Australia	Record daily precipitation	31.6 mm (1.2 in)	43 of 100 (Notable)
Curralinho	Brazil	Record daily precipitation	79.2 mm (3.1 in)	41 of 100 (Notable)
Lucinda Township	Australia	Record daily precipitation	80.2 mm (3.2 in)	40 of 100 (Notable)
Diamantina Lakes	Australia	Record daily precipitation	25.9 mm (1.0 in)	40 of 100 (Notable)
Gloria	Brazil	Record daily precipitation	50.1 mm (2.0 in)	40 of 100 (Notable)
Edwards Creek	Australia	Record daily precipitation	35.0 mm (1.4 in)	39 of 100 (Notable)
Innamincka Station	Australia	Record daily precipitation	40.6 mm (1.6 in)	39 of 100 (Notable)
Jedburgh Station	Australia	Record daily precipitation	25.0 mm (1.0 in)	38 of 100 (Notable)
Sousa	Brazil	Record daily precipitation	85.0 mm (3.3 in)	38 of 100 (Notable)
Acude Pompeu Sobrinho	Brazil	Record daily precipitation	80.2 mm (3.2 in)	37 of 100 (Notable)
Barra Do Jua	Brazil	Record daily precipitation	64.4 mm (2.5 in)	37 of 100 (Notable)
Burdekin Shire Council	Australia	Record daily precipitation	26.0 mm (1.0 in)	36 of 100 (Notable)
Fermoy	Australia	Record daily precipitation	26.2 mm (1.0 in)	36 of 100 (Notable)
Pio IX (Patrocinio)	Brazil	Record daily precipitation	137.8 mm (5.4 in)	36 of 100 (Notable)
Retreat (Barcoo River)	Australia	Record daily precipitation	25.6 mm (1.0 in)	35 of 100 (Notable)
Campos Sales	Brazil	Record daily precipitation	39.3 mm (1.5 in)	34 of 100 (Routine)
Bloomsbury Post Office	Australia	Record daily precipitation	31.2 mm (1.2 in)	33 of 100 (Routine)
Yanco Glen (Corona Homestead)	Australia	Record daily precipitation	77.2 mm (3.0 in)	33 of 100 (Routine)
Bartow 1SE	United States	Record low minimum temperature	5.6 C (42.1 F)	32 of 100 (Routine)
Eton Police Station	Australia	Record daily precipitation	27.4 mm (1.1 in)	31 of 100 (Routine)
Corona Downs	Australia	Record daily precipitation	42.0 mm (1.7 in)	31 of 100 (Routine)
Sherwood Park Station	Australia	Record daily precipitation	43.4 mm (1.7 in)	30 of 100 (Routine)
Elberton 2 N	United States	Record low minimum temperature	1.1 C (34.0 F)	30 of 100 (Routine)
Arkaroola	Australia	Record daily precipitation	27.2 mm (1.1 in)	29 of 100 (Routine)
Curnomona (Curnamona)	Australia	Record daily precipitation	32.0 mm (1.3 in)	29 of 100 (Routine)
Elderslie, Tweedie	South Africa	Record daily precipitation	31.2 mm (1.2 in)	29 of 100 (Routine)
Dahlonega 4WSW	United States	Record low minimum temperature	-1.7 C (28.9 F)	29 of 100 (Routine)
Rio Grande City	United States	Record low maximum temperature	22.8 C (73.0 F)	29 of 100 (Routine)
Nuuanu Rsch 4 783	United States	Record daily precipitation	65.0 mm (2.6 in)	28 of 100 (Routine)
Upanema (Dnocs)	Brazil	Record daily precipitation	57.1 mm (2.2 in)	26 of 100 (Routine)
Serra Negra Do Norte	Brazil	Record daily precipitation	75.3 mm (3.0 in)	26 of 100 (Routine)
Blinman	Australia	Record daily precipitation	28.6 mm (1.1 in)	25 of 100 (Routine)
Frome Downs	Australia	Record daily precipitation	30.0 mm (1.2 in)	25 of 100 (Routine)
Pendencias	Brazil	Record daily precipitation	50.0 mm (2.0 in)	25 of 100 (Routine)
Touros	Brazil	Record daily precipitation	64.2 mm (2.5 in)	25 of 100 (Routine)
Bom Jardim	Brazil	Record daily precipitation	95.2 mm (3.7 in)	25 of 100 (Routine)
Clarksville 2NE	United States	Record low minimum temperature	2.2 C (36.0 F)	25 of 100 (Routine)
Holualoa Beach 68	United States	Record daily precipitation	33.8 mm (1.3 in)	25 of 100 (Routine)
Mtn View 91	United States	Record daily precipitation	108.7 mm (4.3 in)	25 of 100 (Routine)
Camoola Park	Australia	Record daily precipitation	32.6 mm (1.3 in)	24 of 100 (Routine)
Mae Dagua de Dentro	Brazil	Record daily precipitation	52.8 mm (2.1 in)	24 of 100 (Routine)
Pesqueira	Brazil	Record daily precipitation	30.6 mm (1.2 in)	24 of 100 (Routine)
Cochrane	Canada	Record low minimum temperature	-16.7 C (1.9 F)	24 of 100 (Routine)
Borinquen AP	Puerto Rico [United States]	Record low minimum temperature	17.8 C (64.0 F)	24 of 100 (Routine)
Perry	United States	Record low minimum temperature	5.0 C (41.0 F)	24 of 100 (Routine)
Cramond, Albert Fall	South Africa	Record daily precipitation	25.4 mm (1.0 in)	23 of 100 (Routine)
Chemult	United States	Record snow depth	66.0 cm (26.0 in)	23 of 100 (Routine)
Kalamia Estate	Australia	Record daily precipitation	28.0 mm (1.1 in)	22 of 100 (Routine)

Counts by Type and Timescale

326 records

Records set or tied on 18 April 1974 by type: Highest daily maximum 14, Lowest daily maximum 27, Highest daily minimum 29, Lowest daily minimum 49, Heaviest daily rainfall 204, Deepest snow cover 3.

Records on 18 April 1974 by type
Record type	Records
Highest daily maximum	14
Lowest daily maximum	27
Highest daily minimum	29
Lowest daily minimum	49
Heaviest daily rainfall	204
Heaviest daily snowfall	0
Deepest snow cover	3

Records on 18 April 1974 by timescale: all-time 0, monthly 8, daily 318.

How Much Records Were Beaten By

281 broken records

Margins by which the 281 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 254.0. Ties are not counted.

Top 20 by Significance

18 April 1974

Top 20 records on 18 April 1974 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1974	Orroroo (Black Rock), AU	monthly rain	48.0 mm (1.9 in)	19.6 mm (0.8 in)	43 years	64 of 100 (Major)
18 April 1974	Nappa Merrie, AU	daily rain	46.4 mm (1.8 in)	42.3 mm (1.7 in)	39 years	57 of 100 (Notable)
18 April 1974	Pianco, BR	daily rain	103.0 mm (4.1 in)	70.6 mm (2.8 in)	49 years	57 of 100 (Notable)
18 April 1974	Maneroo, AU	daily rain	49.4 mm (1.9 in)	28.6 mm (1.1 in)	82 years	52 of 100 (Notable)
18 April 1974	Tapera, BR	daily rain	108.3 mm (4.3 in)	65.4 mm (2.6 in)	24 years	51 of 100 (Notable)
18 April 1974	Oondooroo, AU	daily rain	59.0 mm (2.3 in)	59.0 mm (2.3 in)	60 years	50 of 100 (Notable)
18 April 1974	Petrolandia (Itaparica), BR	daily rain	60.6 mm (2.4 in)	53.9 mm (2.1 in)	20 years	50 of 100 (Notable)
18 April 1974	Kainaliu 73.2, US	daily rain	89.9 mm (3.5 in)	67.3 mm (2.6 in)	24 years	50 of 100 (Notable)
18 April 1974	Beltana, AU	daily rain	38.0 mm (1.5 in)	21.7 mm (0.9 in)	3 years	48 of 100 (Notable)
18 April 1974	Beltana Station, AU	daily rain	34.0 mm (1.3 in)	20.0 mm (0.8 in)	5 years	45 of 100 (Notable)
18 April 1974	Barra de Santa Rosa, BR	daily rain	83.0 mm (3.3 in)	57.9 mm (2.3 in)	3 years	44 of 100 (Notable)
18 April 1974	Broken Hill (Lintiss Vale), AU	daily rain	37.0 mm (1.5 in)	30.4 mm (1.2 in)	0 years	43 of 100 (Notable)
18 April 1974	Chakola (Umeralla), AU	daily rain	31.6 mm (1.2 in)	29.6 mm (1.2 in)	37 years	43 of 100 (Notable)
18 April 1974	Curralinho, BR	monthly rain	79.2 mm (3.1 in)	23.2 mm (0.9 in)	36 years	41 of 100 (Notable)
18 April 1974	Lucinda Township, AU	daily rain	80.2 mm (3.2 in)	36.3 mm (1.4 in)	72 years	40 of 100 (Notable)
18 April 1974	Diamantina Lakes, AU	daily rain	25.9 mm (1.0 in)	15.7 mm (0.6 in)	82 years	40 of 100 (Notable)
18 April 1974	Gloria, BR	daily rain	50.1 mm (2.0 in)	33.7 mm (1.3 in)	49 years	40 of 100 (Notable)
18 April 1974	Edwards Creek, AU	daily rain	35.0 mm (1.4 in)	24.1 mm (0.9 in)	5 years	39 of 100 (Notable)
18 April 1974	Innamincka Station, AU	daily rain	40.6 mm (1.6 in)	15.2 mm (0.6 in)	56 years	39 of 100 (Notable)
18 April 1974	Jedburgh Station, AU	daily rain	25.0 mm (1.0 in)	24.5 mm (1.0 in)	39 years	38 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

1793 to 1974

Records set or tied on this calendar date in each year from 1793 to 1974. 1974 had 326 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1974-04-18: 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 50	273
50 to 100	7
100 to 150	0
150 to 200	0
200 to 250	0
250 to 300	1