Weather Records on 21 March 1975

751 weather records were set or tied worldwide on 21 March 1975. Highest significance: Coorow, AU.

Key Facts for 21 March 1975

On 21 March 1975, 751 weather records were set or tied at long-record stations worldwide.
172 were record highs and 108 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 18 monthly and 732 daily.
Coorow set a daily record precipitation of 53.0 mm (2.1 in) on 21 March 1975.
Across 157 earlier years (1797 to 2026) the same calendar date averaged 481 records.

Record Map

751 stations

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

Weather records on 21 March 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Coorow	Australia	Record daily precipitation	53.0 mm (2.1 in)	54 of 100 (Notable)
Hyde Park	Australia	Record daily precipitation	61.6 mm (2.4 in)	54 of 100 (Notable)
Koobabbie	Australia	Record daily precipitation	65.8 mm (2.6 in)	54 of 100 (Notable)
Breckenridge	United States	Record daily precipitation	28.4 mm (1.1 in)	54 of 100 (Notable)
Sumy	Ukraine	Record daily precipitation	25.5 mm (1.0 in)	53 of 100 (Notable)
Latham	Australia	Record daily precipitation	31.0 mm (1.2 in)	50 of 100 (Notable)
San Rafael-Civic Ctr	United States	Record daily precipitation	63.5 mm (2.5 in)	50 of 100 (Notable)
Dalwallinu Comparison	Australia	Record daily precipitation	48.6 mm (1.9 in)	48 of 100 (Notable)
Goose A	Canada	Record daily precipitation	52.3 mm (2.1 in)	47 of 100 (Notable)
Carnamah	Australia	Record daily precipitation	47.3 mm (1.9 in)	46 of 100 (Notable)
Usina Sao Jose	Brazil	Record daily precipitation	136.8 mm (5.4 in)	46 of 100 (Notable)
Plymouth Wwtp	United States	Record daily precipitation	31.8 mm (1.3 in)	46 of 100 (Notable)
Manavi	Australia	Record daily precipitation	28.2 mm (1.1 in)	45 of 100 (Notable)
Evanston 1 E	United States	Record daily snowfall	20.3 cm (8.0 in)	45 of 100 (Notable)
Clyde Park	Australia	Record daily precipitation	39.0 mm (1.5 in)	44 of 100 (Notable)
Covelo	United States	Record daily precipitation	77.7 mm (3.1 in)	44 of 100 (Notable)
Red Rvr	United States	Record snow depth	88.9 cm (35.0 in)	43 of 100 (Notable)
Elena	Australia	Record daily precipitation	50.8 mm (2.0 in)	42 of 100 (Notable)
Breckenridge	United States	Record daily snowfall	38.1 cm (15.0 in)	42 of 100 (Notable)
Rock Springs	United States	Record daily snowfall	10.2 cm (4.0 in)	42 of 100 (Notable)
Buntine East	Australia	Record daily precipitation	40.2 mm (1.6 in)	41 of 100 (Notable)
Hakea	Australia	Record daily precipitation	41.0 mm (1.6 in)	41 of 100 (Notable)
Fairfield	Australia	Record daily precipitation	40.6 mm (1.6 in)	40 of 100 (Notable)
Three Springs	Australia	Record daily precipitation	47.4 mm (1.9 in)	40 of 100 (Notable)
Double Island Point Lighthouse	Australia	Record daily precipitation	74.0 mm (2.9 in)	40 of 100 (Notable)
Ellery Lake	United States	Record daily precipitation	33.5 mm (1.3 in)	40 of 100 (Notable)
Sete Barras	Brazil	Record daily precipitation	83.6 mm (3.3 in)	39 of 100 (Notable)
Cambridge	United States	Record daily snowfall	7.6 cm (3.0 in)	39 of 100 (Notable)
Latham East	Australia	Record daily precipitation	28.0 mm (1.1 in)	38 of 100 (Notable)
Lake Margaret Dam	Australia	Record daily precipitation	79.4 mm (3.1 in)	38 of 100 (Notable)
Baraboo Wwtp	United States	Record daily precipitation	25.7 mm (1.0 in)	38 of 100 (Notable)
Stanley Wwtp	United States	Record daily precipitation	32.3 mm (1.3 in)	38 of 100 (Notable)
Dongara	Australia	Record daily precipitation	29.6 mm (1.2 in)	37 of 100 (Notable)
Yandanooka	Australia	Record daily precipitation	34.5 mm (1.4 in)	37 of 100 (Notable)
Dotswood Station	Australia	Record daily precipitation	64.3 mm (2.5 in)	37 of 100 (Notable)
Dauphin A	Canada	Record daily snowfall	16.8 cm (6.6 in)	37 of 100 (Notable)
Socorro	United States	Record high minimum temperature	10.6 C (51.1 F)	37 of 100 (Notable)
Mollerin Post Office	Australia	Record daily precipitation	28.4 mm (1.1 in)	36 of 100 (Notable)
Musgrave	Australia	Record daily precipitation	59.2 mm (2.3 in)	36 of 100 (Notable)
Queenton	Australia	Record daily precipitation	40.0 mm (1.6 in)	36 of 100 (Notable)
Usina Tamoio (Bela Vista)	Brazil	Record daily precipitation	69.7 mm (2.7 in)	36 of 100 (Notable)
Port Stanley	Canada	Record high minimum temperature	3.9 C (39.0 F)	36 of 100 (Notable)
Berkshire Valley	Australia	Record daily precipitation	25.0 mm (1.0 in)	35 of 100 (Notable)
Bradford	Australia	Record daily precipitation	32.0 mm (1.3 in)	35 of 100 (Notable)
Ear Falls	Canada	Record daily snowfall	12.7 cm (5.0 in)	35 of 100 (Notable)
Hill City 1 W	United States	Record daily snowfall	17.8 cm (7.0 in)	35 of 100 (Notable)
Drain	United States	Record daily precipitation	31.5 mm (1.2 in)	35 of 100 (Notable)
Kokardine	Australia	Record daily precipitation	30.0 mm (1.2 in)	34 of 100 (Routine)
Saint Marys College	United States	Record daily precipitation	58.4 mm (2.3 in)	34 of 100 (Routine)
Elko Rgnl AP	United States	Record daily snowfall	7.6 cm (3.0 in)	34 of 100 (Routine)
Strawberry North	Australia	Record daily precipitation	34.0 mm (1.3 in)	33 of 100 (Routine)
Minaru	Australia	Record daily precipitation	48.6 mm (1.9 in)	33 of 100 (Routine)
Wubin	Australia	Record daily precipitation	38.4 mm (1.5 in)	33 of 100 (Routine)
Ytiniche	Australia	Record daily precipitation	30.0 mm (1.2 in)	33 of 100 (Routine)
Gabbin North	Australia	Record daily precipitation	38.0 mm (1.5 in)	33 of 100 (Routine)
Boulia Airport	Australia	Record low minimum temperature	12.5 C (54.5 F)	33 of 100 (Routine)
Hopedale (Aut)	Canada	Record daily snowfall	23.9 cm (9.4 in)	33 of 100 (Routine)
Kenai AP	United States	Record low maximum temperature	-10.6 C (12.9 F)	33 of 100 (Routine)
Nome AP	United States	Record low minimum temperature	-41.7 C (-43.1 F)	33 of 100 (Routine)
Maya	Australia	Record daily precipitation	54.8 mm (2.2 in)	32 of 100 (Routine)

Counts by Type and Timescale

751 records

Records set or tied on 21 March 1975 by type: Highest daily maximum 62, Lowest daily maximum 70, Highest daily minimum 110, Lowest daily minimum 38, Heaviest daily rainfall 405, Heaviest daily snowfall 53, Deepest snow cover 13.

Records on 21 March 1975 by type
Record type	Records
Highest daily maximum	62
Lowest daily maximum	70
Highest daily minimum	110
Lowest daily minimum	38
Heaviest daily rainfall	405
Heaviest daily snowfall	53
Deepest snow cover	13

Records on 21 March 1975 by timescale: all-time 1, monthly 18, daily 732.

How Much Records Were Beaten By

638 broken records

Margins by which the 638 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 279.0. Ties are not counted.

Top 20 by Significance

21 March 1975

Top 20 records on 21 March 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 March 1975	Coorow, AU	daily rain	53.0 mm (2.1 in)	49.4 mm (1.9 in)	28 years	54 of 100 (Notable)
21 March 1975	Hyde Park, AU	daily rain	61.6 mm (2.4 in)	57.0 mm (2.2 in)	28 years	54 of 100 (Notable)
21 March 1975	Koobabbie, AU	daily rain	65.8 mm (2.6 in)	63.8 mm (2.5 in)	28 years	54 of 100 (Notable)
21 March 1975	Breckenridge, US	daily rain	28.4 mm (1.1 in)	21.0 mm (0.8 in)	22 years	54 of 100 (Notable)
21 March 1975	Sumy, UA	monthly rain	25.5 mm (1.0 in)	9.7 mm (0.38 in)	19 years	53 of 100 (Notable)
21 March 1975	Latham, AU	daily rain	31.0 mm (1.2 in)	31.0 mm (1.2 in)	40 years	50 of 100 (Notable)
21 March 1975	San Rafael-Civic Ctr, US	daily rain	63.5 mm (2.5 in)	30.0 mm (1.2 in)	79 years	50 of 100 (Notable)
21 March 1975	Dalwallinu Comparison, AU	daily rain	48.6 mm (1.9 in)	44.0 mm (1.7 in)	28 years	48 of 100 (Notable)
21 March 1975	Goose A, CA	monthly rain	52.3 mm (2.1 in)	15.2 mm (0.6 in)	31 years	47 of 100 (Notable)
21 March 1975	Carnamah, AU	daily rain	47.3 mm (1.9 in)	42.5 mm (1.7 in)	40 years	46 of 100 (Notable)
21 March 1975	Usina Sao Jose, BR	all-time rain	136.8 mm (5.4 in)	24.2 mm (1.0 in)	5 years	46 of 100 (Notable)
21 March 1975	Plymouth Wwtp, US	daily rain	31.8 mm (1.3 in)	15.0 mm (0.6 in)	61 years	46 of 100 (Notable)
21 March 1975	Manavi, AU	daily rain	28.2 mm (1.1 in)	25.4 mm (1.0 in)	57 years	45 of 100 (Notable)
21 March 1975	Evanston 1 E, US	daily snowfall	20.3 cm (8.0 in)	7.6 cm (3.0 in)	75 years	45 of 100 (Notable)
21 March 1975	Clyde Park, AU	daily rain	39.0 mm (1.5 in)	34.9 mm (1.4 in)	40 years	44 of 100 (Notable)
21 March 1975	Covelo, US	daily rain	77.7 mm (3.1 in)	32.0 mm (1.3 in)	37 years	44 of 100 (Notable)
21 March 1975	Red Rvr, US	daily snow depth	88.9 cm (35.0 in)	27.9 cm (11.0 in)	56 years	43 of 100 (Notable)
21 March 1975	Elena, AU	daily rain	50.8 mm (2.0 in)	49.0 mm (1.9 in)	16 years	42 of 100 (Notable)
21 March 1975	Breckenridge, US	monthly snowfall	38.1 cm (15.0 in)	1.3 cm (0.5 in)	76 years	42 of 100 (Notable)
21 March 1975	Rock Springs, US	daily snowfall	10.2 cm (4.0 in)	9.4 cm (3.7 in)	41 years	42 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

1797 to 1975

Records set or tied on this calendar date in each year from 1797 to 1975. 1975 had 751 records.

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

Records on 03-21 in each year
Year	Records
1797	2
1805	1
1806	1
1822	1
1830	1
1836	1
1837	1
1845	1
1846	1
1850	1
1852	2
1857	1
1865	7
1874	1
1877	1
1880	1
1881	1
1883	2
1884	1
1885	5
1886	2
1888	1
1890	3
1892	1
1893	1
1894	1
1895	1
1896	2
1897	2
1898	3
1899	4
1900	4
1901	9
1902	18
1903	23
1904	17
1905	6
1906	3
1907	14
1908	3
1909	11
1910	10
1911	10
1912	36
1913	97
1914	71
1915	27
1916	44
1917	43
1918	43
1919	29
1920	90
1921	96
1922	50
1923	72
1924	96
1925	141
1926	282
1927	179
1928	293
1929	104
1930	99
1931	638
1932	305
1933	235
1934	114
1935	675
1936	225
1937	172
1938	783
1939	280
1940	366
1941	311
1942	330
1943	217
1944	556
1945	294
1946	570
1947	192
1948	948
1949	330
1950	398
1951	779
1952	689
1953	342
1954	211
1955	1,124
1956	686
1957	373
1958	619
1959	230
1960	892
1961	268
1962	548
1963	298
1964	333
1965	1,961
1966	464
1967	487
1968	798
1969	219
1970	612
1971	358
1972	519
1973	385
1974	1,097
1975	751
1976	710
1977	376
1978	838
1979	656
1980	775
1981	676
1982	850
1983	1,673
1984	835
1985	503
1986	1,170
1987	948
1988	1,155
1989	1,396
1990	1,380
1991	1,446
1992	877
1993	687
1994	684
1995	1,141
1996	1,119
1997	1,670
1998	935
1999	1,044
2000	802
2001	1,342
2002	1,593
2003	1,073
2004	1,511
2005	649
2006	1,417
2007	1,220
2008	734
2009	558
2010	1,134
2011	1,451
2012	2,854
2013	727
2014	639
2015	568
2016	553
2017	1,117
2018	809
2019	649
2020	445
2021	489
2022	615
2023	815
2024	432
2025	845
2026	2,614

Download the Data

Data for records on 1975-03-21: 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).

Margin	Records
0 to 50	607
50 to 100	22
100 to 150	8
150 to 200	0
200 to 250	0
250 to 300	1