Weather Records on 21 April 1975

360 weather records were set or tied worldwide on 21 April 1975. Highest significance: Lakes Entrance Post Office, AU.

Key Facts for 21 April 1975

On 21 April 1975, 360 weather records were set or tied at long-record stations worldwide.
91 were record highs and 147 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 5 monthly and 354 daily.
Lakes Entrance Post Office set a daily record precipitation of 63.8 mm (2.5 in) on 21 April 1975.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 463 records.

Record Map

360 stations

360 station records on 21 April 1975 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lakes Entrance Post Office	Australia	Record daily precipitation	63.8 mm (2.5 in)	64 of 100 (Major)
Ravensthorpe	Australia	Record daily precipitation	37.0 mm (1.5 in)	52 of 100 (Notable)
Pedra Lavrada	Brazil	Record daily precipitation	70.5 mm (2.8 in)	51 of 100 (Notable)
Ensay	Australia	Record daily precipitation	42.0 mm (1.7 in)	50 of 100 (Notable)
Umlaas Waterworks	South Africa	Record daily precipitation	70.0 mm (2.8 in)	50 of 100 (Notable)
Middelkop	South Africa	Record daily precipitation	49.5 mm (1.9 in)	49 of 100 (Notable)
Afogados da Ingazeira (Dnocs)	Brazil	Record daily precipitation	88.0 mm (3.5 in)	46 of 100 (Notable)
Majkop	Russia	Record daily precipitation	26.0 mm (1.0 in)	40 of 100 (Notable)
Wantabadgery	Australia	Record daily precipitation	31.8 mm (1.3 in)	39 of 100 (Notable)
Khosis	South Africa	Record daily precipitation	26.5 mm (1.0 in)	38 of 100 (Notable)
Falls River	Canada	Record daily snowfall	10.2 cm (4.0 in)	37 of 100 (Notable)
Cracow Store	Australia	Record daily precipitation	25.6 mm (1.0 in)	36 of 100 (Notable)
Cathcart	South Africa	Record daily precipitation	51.0 mm (2.0 in)	36 of 100 (Notable)
Kislovodsk	Russia	Record daily precipitation	42.4 mm (1.7 in)	35 of 100 (Notable)
Nalcik	Russia	Record daily precipitation	37.8 mm (1.5 in)	35 of 100 (Notable)
Velikie Luki	Russia	Record high minimum temperature	8.1 C (46.6 F)	34 of 100 (Routine)
Wheatlands	South Africa	Record daily precipitation	39.5 mm (1.6 in)	34 of 100 (Routine)
Winona	United States	Record low minimum temperature	-5.6 C (21.9 F)	34 of 100 (Routine)
Hopetoun	Australia	Record daily precipitation	28.0 mm (1.1 in)	33 of 100 (Routine)
Medford	United States	Record low maximum temperature	2.2 C (36.0 F)	33 of 100 (Routine)
Allende (Smn)	Mexico	Record low minimum temperature	6.7 C (44.1 F)	32 of 100 (Routine)
Borzja	Russia	Record high minimum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Portage Wwtp	United States	Record low minimum temperature	-6.1 C (21.0 F)	31 of 100 (Routine)
Clarkson	United States	Record daily precipitation	43.7 mm (1.7 in)	30 of 100 (Routine)
Cocanarup	Australia	Record daily precipitation	25.0 mm (1.0 in)	29 of 100 (Routine)
Elberton 2 N	United States	Record low minimum temperature	0.0 C (32.0 F)	29 of 100 (Routine)
Bancroft	Canada	Record low minimum temperature	-11.7 C (10.9 F)	28 of 100 (Routine)
Steeunmekaar (Pol)	South Africa	Record daily precipitation	31.0 mm (1.2 in)	27 of 100 (Routine)
Prairie du Sac 2 N	United States	Record low minimum temperature	-2.2 C (28.0 F)	27 of 100 (Routine)
Seaspray (Burong)	Australia	Record daily precipitation	25.2 mm (1.0 in)	26 of 100 (Routine)
Teslin A	Canada	Record daily snowfall	5.3 cm (2.1 in)	26 of 100 (Routine)
Apatzingan (Smn)	Mexico	Record high minimum temperature	33.3 C (91.9 F)	26 of 100 (Routine)
Rugby (Carovale)	Australia	Record daily precipitation	32.0 mm (1.3 in)	25 of 100 (Routine)
Rexton	Canada	Record daily snowfall	5.1 cm (2.0 in)	25 of 100 (Routine)
Tonala (Smn)	Mexico	Record high maximum temperature	38.9 C (102.0 F)	25 of 100 (Routine)
Rockville 1 NE	United States	Record low minimum temperature	-1.7 C (28.9 F)	25 of 100 (Routine)
St Lin des Laurentides	Canada	Record low maximum temperature	1.1 C (34.0 F)	24 of 100 (Routine)
Tsalka	Georgia	Record daily precipitation	29.2 mm (1.1 in)	24 of 100 (Routine)
Kandalaksa	Russia	Record high maximum temperature	10.4 C (50.7 F)	24 of 100 (Routine)
Dennison Wtr Wks	United States	Record low minimum temperature	-6.1 C (21.0 F)	24 of 100 (Routine)
Alta 1 NNW	United States	Record snow depth	76.2 cm (30.0 in)	24 of 100 (Routine)
Gallivare_A	Sweden	Record high minimum temperature	1.1 C (34.0 F)	23 of 100 (Routine)
Glen St Mary 1 W	United States	Record low maximum temperature	18.3 C (64.9 F)	23 of 100 (Routine)
Balmorhea	United States	Record low minimum temperature	1.1 C (34.0 F)	23 of 100 (Routine)
Morrisburg	Canada	Record low minimum temperature	-6.7 C (19.9 F)	22 of 100 (Routine)
Isit	Russia	Record high maximum temperature	18.0 C (64.4 F)	22 of 100 (Routine)
Staraja_Russa	Russia	Record high minimum temperature	8.7 C (47.7 F)	22 of 100 (Routine)
Chasm Falls	United States	Record low minimum temperature	-9.4 C (15.1 F)	22 of 100 (Routine)
La Malbaie	Canada	Record low maximum temperature	1.7 C (35.1 F)	21 of 100 (Routine)
Tadoussac	Canada	Record low minimum temperature	-5.6 C (21.9 F)	21 of 100 (Routine)
San Bartolo	Mexico	Record high minimum temperature	21.7 C (71.1 F)	21 of 100 (Routine)
Libode (Bos)	South Africa	Record daily precipitation	44.0 mm (1.7 in)	21 of 100 (Routine)
Greenville Muni AP	United States	Record low maximum temperature	-0.6 C (30.9 F)	21 of 100 (Routine)
Semej	Kazakhstan	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Cradock	South Africa	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Kerch	Ukraine	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Semonaiha	Kazakhstan	Record daily precipitation	14.1 mm (0.6 in)	20 of 100 (Routine)
Volodarskoe	Kazakhstan	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Kokshetay	Kazakhstan	Record daily precipitation	9.5 mm (0.37 in)	20 of 100 (Routine)
Ust-Ilimsk	Russia	Record daily precipitation	6.2 mm (0.24 in)	20 of 100 (Routine)

Counts by Type and Timescale

360 records

Records set or tied on 21 April 1975 by type: Highest daily maximum 41, Lowest daily maximum 61, Highest daily minimum 50, Lowest daily minimum 86, Heaviest daily rainfall 105, Heaviest daily snowfall 7, Deepest snow cover 10.

Records on 21 April 1975 by type
Record type	Records
Highest daily maximum	41
Lowest daily maximum	61
Highest daily minimum	50
Lowest daily minimum	86
Heaviest daily rainfall	105
Heaviest daily snowfall	7
Deepest snow cover	10

Records on 21 April 1975 by timescale: all-time 1, monthly 5, daily 354.

How Much Records Were Beaten By

275 broken records

Margins by which the 275 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 406.0. Ties are not counted.

Top 20 by Significance

21 April 1975

Top 20 records on 21 April 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1975	Lakes Entrance Post Office, AU	daily rain	63.8 mm (2.5 in)	44.7 mm (1.8 in)	50 years	64 of 100 (Major)
21 April 1975	Ravensthorpe, AU	daily rain	37.0 mm (1.5 in)	30.4 mm (1.2 in)	22 years	52 of 100 (Notable)
21 April 1975	Pedra Lavrada, BR	daily rain	70.5 mm (2.8 in)	63.3 mm (2.5 in)	25 years	51 of 100 (Notable)
21 April 1975	Ensay, AU	daily rain	42.0 mm (1.7 in)	26.5 mm (1.0 in)	62 years	50 of 100 (Notable)
21 April 1975	Umlaas Waterworks, ZA	daily rain	70.0 mm (2.8 in)	49.2 mm (1.9 in)	52 years	50 of 100 (Notable)
21 April 1975	Middelkop, ZA	daily rain	49.5 mm (1.9 in)	34.3 mm (1.4 in)	36 years	49 of 100 (Notable)
21 April 1975	Afogados da Ingazeira (Dnocs), BR	daily rain	88.0 mm (3.5 in)	55.6 mm (2.2 in)	25 years	46 of 100 (Notable)
21 April 1975	Majkop, RU	daily rain	26.0 mm (1.0 in)	13.3 mm (0.5 in)	36 years	40 of 100 (Notable)
21 April 1975	Wantabadgery, AU	daily rain	31.8 mm (1.3 in)	11.5 mm (0.5 in)	68 years	39 of 100 (Notable)
21 April 1975	Khosis, ZA	daily rain	26.5 mm (1.0 in)	18.9 mm (0.7 in)	57 years	38 of 100 (Notable)
21 April 1975	Falls River, CA	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	42 years	37 of 100 (Notable)
21 April 1975	Cracow Store, AU	daily rain	25.6 mm (1.0 in)	24.6 mm (1.0 in)	40 years	36 of 100 (Notable)
21 April 1975	Cathcart, ZA	daily rain	51.0 mm (2.0 in)	21.5 mm (0.8 in)	16 years	36 of 100 (Notable)
21 April 1975	Kislovodsk, RU	monthly rain	42.4 mm (1.7 in)	0.9 mm (0.04 in)	52 years	35 of 100 (Notable)
21 April 1975	Nalcik, RU	daily rain	37.8 mm (1.5 in)	17.1 mm (0.7 in)	8 years	35 of 100 (Notable)
21 April 1975	Velikie Luki, RU	daily high min	8.1 C (46.6 F)	0.4 C (0.7 F)	84 years	34 of 100 (Routine)
21 April 1975	Wheatlands, ZA	daily rain	39.5 mm (1.6 in)	23.0 mm (0.9 in)	16 years	34 of 100 (Routine)
21 April 1975	Winona, US	daily low min	-5.6 C (21.9 F)	2.8 C (5.0 F)	70 years	34 of 100 (Routine)
21 April 1975	Hopetoun, AU	daily rain	28.0 mm (1.1 in)	15.6 mm (0.6 in)	22 years	33 of 100 (Routine)
21 April 1975	Medford, US	daily low max	2.2 C (36.0 F)	1.1 C (2.0 F)	81 years	33 of 100 (Routine)

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 1975

Records set or tied on this calendar date in each year from 1793 to 1975. 1975 had 360 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	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 1975-04-21: 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 2026-10-14 (14 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).

Histogram of margins by which records were beaten on 21 April 1975
Margin	Records
0 to 100	269
100 to 200	3
200 to 300	1
300 to 400	1
400 to 500	1