Weather Records on 21 April 1974

528 weather records were set or tied worldwide on 21 April 1974. Highest significance: Pathfinder Dam, US.

Key Facts for 21 April 1974

On 21 April 1974, 528 weather records were set or tied at long-record stations worldwide.
96 were record highs and 47 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 18 monthly and 510 daily.
Pathfinder Dam set a monthly record daily precipitation of 69.9 mm (2.8 in) on 21 April 1974.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

528 stations

528 station records on 21 April 1974 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1974: highest significance records shown on the map
Station	Country	Type	Value	Significance
Pathfinder Dam	United States	Record daily precipitation	69.9 mm (2.8 in)	75 of 100 (Major)
Forestburg 5 S	United States	Record daily precipitation	134.1 mm (5.3 in)	71 of 100 (Major)
Broken Hill (Langawirra)	Australia	Record daily precipitation	49.0 mm (1.9 in)	69 of 100 (Major)
Roby	United States	Record daily precipitation	50.8 mm (2.0 in)	63 of 100 (Major)
Little Rock AP Adams Fld	United States	Record daily precipitation	192.5 mm (7.6 in)	62 of 100 (Major)
Chatsbury (Maryland)	Australia	Record daily precipitation	56.0 mm (2.2 in)	61 of 100 (Major)
Southport Ridgeway Ave	Australia	Record daily precipitation	110.4 mm (4.3 in)	55 of 100 (Notable)
Cobbity (Roseneath)	Australia	Record daily precipitation	60.0 mm (2.4 in)	55 of 100 (Notable)
Ear Falls	Canada	Record daily precipitation	62.2 mm (2.4 in)	54 of 100 (Notable)
Angus 1 N	United States	Record daily precipitation	49.5 mm (1.9 in)	53 of 100 (Notable)
Broken Hill (Nuntherungie)	Australia	Record daily precipitation	28.0 mm (1.1 in)	52 of 100 (Notable)
Mount Victoria (Mt Victoria (S	Australia	Record daily precipitation	96.0 mm (3.8 in)	52 of 100 (Notable)
Herington	United States	Record daily precipitation	55.4 mm (2.2 in)	52 of 100 (Notable)
Mulbring (Vincent Street)	Australia	Record daily precipitation	112.0 mm (4.4 in)	51 of 100 (Notable)
Sousa	Brazil	Record daily precipitation	123.0 mm (4.8 in)	51 of 100 (Notable)
Lowan Hills	Australia	Record daily precipitation	76.0 mm (3.0 in)	50 of 100 (Notable)
Gosford (Gertrude Place)	Australia	Record daily precipitation	84.0 mm (3.3 in)	50 of 100 (Notable)
Wyong (Wyong Golf Club)	Australia	Record daily precipitation	81.8 mm (3.2 in)	50 of 100 (Notable)
Maroota ( Roberts Road)	Australia	Record daily precipitation	85.2 mm (3.4 in)	50 of 100 (Notable)
Crookston NW Exp STN	United States	Record daily precipitation	45.5 mm (1.8 in)	50 of 100 (Notable)
Grand Forks UNIV (NWS)	United States	Record daily precipitation	53.3 mm (2.1 in)	50 of 100 (Notable)
Mount Wilson (Nooroo)	Australia	Record daily precipitation	125.2 mm (4.9 in)	49 of 100 (Notable)
Hamlin 1SW	United States	Record daily precipitation	50.0 mm (2.0 in)	49 of 100 (Notable)
Cargoon Station	Australia	Record daily precipitation	49.0 mm (1.9 in)	48 of 100 (Notable)
Roma Post Office	Australia	Record daily precipitation	52.0 mm (2.0 in)	48 of 100 (Notable)
Calliope Public School	Australia	Record daily precipitation	90.2 mm (3.6 in)	48 of 100 (Notable)
Clarinda	United States	Record daily precipitation	77.0 mm (3.0 in)	48 of 100 (Notable)
Katoomba (Murri St)	Australia	Record daily precipitation	115.7 mm (4.6 in)	47 of 100 (Notable)
Aiuaba (Bebedouro)	Brazil	Record daily precipitation	85.4 mm (3.4 in)	47 of 100 (Notable)
Corning	United States	Record daily precipitation	108.0 mm (4.3 in)	47 of 100 (Notable)
Warroad	United States	Record daily precipitation	63.2 mm (2.5 in)	47 of 100 (Notable)
Oberon (Jenolan State Forest)	Australia	Record daily precipitation	77.8 mm (3.1 in)	46 of 100 (Notable)
Biddle	United States	Record daily precipitation	31.8 mm (1.3 in)	45 of 100 (Notable)
Tahlee (Carrington (Church St)	Australia	Record daily precipitation	104.0 mm (4.1 in)	44 of 100 (Notable)
Rolla 1NE	United States	Record daily precipitation	35.3 mm (1.4 in)	44 of 100 (Notable)
Blair Athol	Australia	Record daily precipitation	44.6 mm (1.8 in)	43 of 100 (Notable)
Oxenford (Oberon Way)	Australia	Record daily precipitation	108.0 mm (4.3 in)	43 of 100 (Notable)
Bilpin (Fern Grove)	Australia	Record daily precipitation	132.4 mm (5.2 in)	43 of 100 (Notable)
Brushgrove Post Office	Australia	Record daily precipitation	76.0 mm (3.0 in)	42 of 100 (Notable)
Raymond Terrace (Kinross)	Australia	Record daily precipitation	107.0 mm (4.2 in)	42 of 100 (Notable)
Little Hartley (Sheepcombe)	Australia	Record daily precipitation	53.4 mm (2.1 in)	42 of 100 (Notable)
Ryde Pumping Station	Australia	Record daily precipitation	58.2 mm (2.3 in)	42 of 100 (Notable)
Fayetteville Exp STN	United States	Record daily precipitation	77.5 mm (3.1 in)	42 of 100 (Notable)
Paragould	United States	Record daily precipitation	86.6 mm (3.4 in)	42 of 100 (Notable)
Mayville	United States	Record daily precipitation	44.2 mm (1.7 in)	42 of 100 (Notable)
Woodhouselee (Leeston)	Australia	Record daily precipitation	27.0 mm (1.1 in)	41 of 100 (Notable)
Exeter	Australia	Record daily precipitation	65.0 mm (2.6 in)	40 of 100 (Notable)
Penrose (Panorama)	Australia	Record daily precipitation	94.4 mm (3.7 in)	40 of 100 (Notable)
Tallong (Caoura)	Australia	Record daily precipitation	75.0 mm (3.0 in)	40 of 100 (Notable)
Fazenda Riacho Fundo	Brazil	Record daily precipitation	88.0 mm (3.5 in)	40 of 100 (Notable)
Roseau	United States	Record daily precipitation	53.1 mm (2.1 in)	40 of 100 (Notable)
Paulistana	Brazil	Record daily precipitation	49.2 mm (1.9 in)	39 of 100 (Notable)
Fall Rvr Lake	United States	Record daily precipitation	33.5 mm (1.3 in)	39 of 100 (Notable)
Springwood Bowling Club	Australia	Record daily precipitation	94.0 mm (3.7 in)	38 of 100 (Notable)
Possum Kingdom Dam	United States	Record daily precipitation	69.6 mm (2.7 in)	38 of 100 (Notable)
Thargomindah Post Office	Australia	Record daily precipitation	33.8 mm (1.3 in)	37 of 100 (Notable)
Krambach Post Office	Australia	Record daily precipitation	70.0 mm (2.8 in)	37 of 100 (Notable)
Vlakkloof Estate	South Africa	Record daily precipitation	45.0 mm (1.8 in)	37 of 100 (Notable)
Newton	United States	Record daily precipitation	53.8 mm (2.1 in)	37 of 100 (Notable)
Grand Forks Intl AP	United States	Record daily precipitation	29.5 mm (1.2 in)	37 of 100 (Notable)

Counts by Type and Timescale

528 records

Records set or tied on 21 April 1974 by type: Highest daily maximum 27, Lowest daily maximum 18, Highest daily minimum 69, Lowest daily minimum 29, Heaviest daily rainfall 377, Heaviest daily snowfall 6, Deepest snow cover 2.

Records on 21 April 1974 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	18
Highest daily minimum	69
Lowest daily minimum	29
Heaviest daily rainfall	377
Heaviest daily snowfall	6
Deepest snow cover	2

Records on 21 April 1974 by timescale: all-time 0, monthly 18, daily 510.

How Much Records Were Beaten By

468 broken records

Margins by which the 468 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 229.0. Ties are not counted.

Top 20 by Significance

21 April 1974

Top 20 records on 21 April 1974 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1974	Pathfinder Dam, US	monthly rain	69.9 mm (2.8 in)	34.3 mm (1.4 in)	63 years	75 of 100 (Major)
21 April 1974	Forestburg 5 S, US	daily rain	134.1 mm (5.3 in)	90.4 mm (3.6 in)	78 years	71 of 100 (Major)
21 April 1974	Broken Hill (Langawirra), AU	daily rain	49.0 mm (1.9 in)	36.8 mm (1.4 in)	72 years	69 of 100 (Major)
21 April 1974	Roby, US	daily rain	50.8 mm (2.0 in)	41.4 mm (1.6 in)	78 years	63 of 100 (Major)
21 April 1974	Little Rock AP Adams Fld, US	monthly rain	192.5 mm (7.6 in)	69.6 mm (2.7 in)	32 years	62 of 100 (Major)
21 April 1974	Chatsbury (Maryland), AU	daily rain	56.0 mm (2.2 in)	35.2 mm (1.4 in)	82 years	61 of 100 (Major)
21 April 1974	Southport Ridgeway Ave, AU	daily rain	110.4 mm (4.3 in)	53.5 mm (2.1 in)	72 years	55 of 100 (Notable)
21 April 1974	Cobbity (Roseneath), AU	daily rain	60.0 mm (2.4 in)	32.8 mm (1.3 in)	72 years	55 of 100 (Notable)
21 April 1974	Ear Falls, CA	monthly rain	62.2 mm (2.4 in)	28.9 mm (1.1 in)	1 year	54 of 100 (Notable)
21 April 1974	Angus 1 N, US	daily rain	49.5 mm (1.9 in)	36.5 mm (1.4 in)	20 years	53 of 100 (Notable)
21 April 1974	Broken Hill (Nuntherungie), AU	daily rain	28.0 mm (1.1 in)	17.8 mm (0.7 in)	72 years	52 of 100 (Notable)
21 April 1974	Mount Victoria (Mt Victoria (S, AU	daily rain	96.0 mm (3.8 in)	55.9 mm (2.2 in)	9 years	52 of 100 (Notable)
21 April 1974	Herington, US	daily rain	55.4 mm (2.2 in)	42.4 mm (1.7 in)	40 years	52 of 100 (Notable)
21 April 1974	Mulbring (Vincent Street), AU	daily rain	112.0 mm (4.4 in)	83.0 mm (3.3 in)	24 years	51 of 100 (Notable)
21 April 1974	Sousa, BR	daily rain	123.0 mm (4.8 in)	96.0 mm (3.8 in)	17 years	51 of 100 (Notable)
21 April 1974	Lowan Hills, AU	daily rain	76.0 mm (3.0 in)	50.9 mm (2.0 in)	45 years	50 of 100 (Notable)
21 April 1974	Gosford (Gertrude Place), AU	daily rain	84.0 mm (3.3 in)	55.0 mm (2.2 in)	56 years	50 of 100 (Notable)
21 April 1974	Wyong (Wyong Golf Club), AU	daily rain	81.8 mm (3.2 in)	50.8 mm (2.0 in)	60 years	50 of 100 (Notable)
21 April 1974	Maroota ( Roberts Road), AU	daily rain	85.2 mm (3.4 in)	74.5 mm (2.9 in)	43 years	50 of 100 (Notable)
21 April 1974	Crookston NW Exp STN, US	daily rain	45.5 mm (1.8 in)	29.0 mm (1.1 in)	9 years	50 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 528 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	887
2024	754
2025	506
2026	853

Download the Data

Data for records on 1974-04-21: 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 2026-10-16 (16 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	445
50 to 100	21
100 to 150	1
150 to 200	0
200 to 250	1