Weather Records on 21 April 1973

1,163 weather records were set or tied worldwide on 21 April 1973. Highest significance: Marshall, US.

Key Facts for 21 April 1973

On 21 April 1973, 1,163 weather records were set or tied at long-record stations worldwide.
627 were record highs and 143 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 55 monthly and 1,104 daily.
Marshall set a monthly record daily precipitation of 149.1 mm (5.9 in) on 21 April 1973.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 458 records.

Record Map

1,163 stations

1,163 station records on 21 April 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Marshall	United States	Record daily precipitation	149.1 mm (5.9 in)	76 of 100 (Major)
Beloit	United States	Record daily precipitation	99.1 mm (3.9 in)	73 of 100 (Major)
Mt Pleasant 1 SW	United States	Record daily precipitation	63.5 mm (2.5 in)	71 of 100 (Major)
Poplar 2 E	United States	Record daily snowfall	15.2 cm (6.0 in)	68 of 100 (Major)
Morrison	United States	Record daily precipitation	101.6 mm (4.0 in)	65 of 100 (Major)
Madison	United States	Record daily precipitation	228.6 mm (9.0 in)	65 of 100 (Major)
Washington	United States	Record daily precipitation	61.0 mm (2.4 in)	64 of 100 (Major)
Aledo	United States	Record daily precipitation	123.7 mm (4.9 in)	62 of 100 (Major)
Muscatine 2	United States	Record daily precipitation	57.9 mm (2.3 in)	62 of 100 (Major)
Steffenville	United States	Record daily precipitation	80.8 mm (3.2 in)	61 of 100 (Major)
Dorado 2 WNW	Puerto Rico [United States]	Record daily precipitation	139.7 mm (5.5 in)	60 of 100 (Major)
Keosauqua	United States	Record daily precipitation	106.7 mm (4.2 in)	60 of 100 (Major)
Waukesha Wwtp	United States	Record daily precipitation	85.6 mm (3.4 in)	60 of 100 (Major)
Bloomfield	United States	Record daily precipitation	101.6 mm (4.0 in)	59 of 100 (Notable)
Crow Agency	United States	Record snow depth	58.4 cm (23.0 in)	59 of 100 (Notable)
Quincy Mem Brg	United States	Record daily precipitation	98.6 mm (3.9 in)	58 of 100 (Notable)
Windsor	United States	Record daily precipitation	159.5 mm (6.3 in)	58 of 100 (Notable)
Palmyra	United States	Record daily precipitation	82.3 mm (3.2 in)	57 of 100 (Notable)
Shelbina	United States	Record daily precipitation	128.8 mm (5.1 in)	57 of 100 (Notable)
Moline Quad City Intl AP	United States	Record daily precipitation	108.2 mm (4.3 in)	57 of 100 (Notable)
Fayette	United States	Record daily precipitation	162.6 mm (6.4 in)	56 of 100 (Notable)
Golden	United States	Record daily precipitation	59.4 mm (2.3 in)	55 of 100 (Notable)
The Pas A	Canada	Record daily snowfall	35.6 cm (14.0 in)	54 of 100 (Notable)
Bloomington Normal	United States	Record daily precipitation	55.9 mm (2.2 in)	54 of 100 (Notable)
Dixon Wwtp	United States	Record daily precipitation	49.8 mm (2.0 in)	54 of 100 (Notable)
Bridger 2 N	United States	Record snow depth	43.2 cm (17.0 in)	53 of 100 (Notable)
Araxa	Brazil	Record daily precipitation	81.0 mm (3.2 in)	51 of 100 (Notable)
Aracati	Brazil	Record daily precipitation	131.3 mm (5.2 in)	51 of 100 (Notable)
Keokuk L&D 19	United States	Record daily precipitation	60.5 mm (2.4 in)	51 of 100 (Notable)
Sedalia Wtp	United States	Record daily precipitation	110.2 mm (4.3 in)	51 of 100 (Notable)
Bluffs	United States	Record daily precipitation	98.8 mm (3.9 in)	50 of 100 (Notable)
Deaver	United States	Record daily snowfall	30.5 cm (12.0 in)	50 of 100 (Notable)
Wien	Austria	Record daily precipitation	45.6 mm (1.8 in)	49 of 100 (Notable)
Itajobi	Brazil	Record daily precipitation	53.6 mm (2.1 in)	49 of 100 (Notable)
Manati 2 E	Puerto Rico [United States]	Record daily precipitation	92.2 mm (3.6 in)	49 of 100 (Notable)
Monroe City	United States	Record daily precipitation	110.5 mm (4.4 in)	49 of 100 (Notable)
Brunswick	United States	Record daily precipitation	94.0 mm (3.7 in)	48 of 100 (Notable)
Edina	United States	Record daily precipitation	68.6 mm (2.7 in)	48 of 100 (Notable)
Warrensburg 4NW	United States	Record daily precipitation	108.5 mm (4.3 in)	48 of 100 (Notable)
Paris 5 S	United States	Record daily precipitation	133.4 mm (5.3 in)	47 of 100 (Notable)
Gladstone L/D 18	United States	Record daily precipitation	72.4 mm (2.9 in)	46 of 100 (Notable)
Princeville	United States	Record daily precipitation	65.0 mm (2.6 in)	46 of 100 (Notable)
Springfield Abraham Lincoln Ca	United States	Record daily precipitation	53.6 mm (2.1 in)	46 of 100 (Notable)
Usina Ester	Brazil	Record daily precipitation	35.1 mm (1.4 in)	45 of 100 (Notable)
Southampton	Canada	Record high minimum temperature	15.6 C (60.1 F)	45 of 100 (Notable)
Corozal Substn	Puerto Rico [United States]	Record daily precipitation	200.4 mm (7.9 in)	45 of 100 (Notable)
Brookfield	United States	Record daily precipitation	105.2 mm (4.1 in)	44 of 100 (Notable)
Durham	Canada	Record high minimum temperature	15.0 C (59.0 F)	43 of 100 (Notable)
Mt Sterling	United States	Record daily precipitation	95.3 mm (3.8 in)	43 of 100 (Notable)
Rochelle 6 NW	United States	Record daily precipitation	55.9 mm (2.2 in)	43 of 100 (Notable)
Clinton #1	United States	Record daily precipitation	76.2 mm (3.0 in)	43 of 100 (Notable)
Wapello	United States	Record daily precipitation	63.0 mm (2.5 in)	42 of 100 (Notable)
Memphis	United States	Record daily precipitation	68.3 mm (2.7 in)	42 of 100 (Notable)
Red Lodge	United States	Record snow depth	88.9 cm (35.0 in)	42 of 100 (Notable)
Portage Wwtp	United States	Record daily precipitation	34.5 mm (1.4 in)	42 of 100 (Notable)
Milwaukee Mitchell AP	United States	Record daily precipitation	70.6 mm (2.8 in)	42 of 100 (Notable)
Champaign 3S	United States	Record daily precipitation	59.4 mm (2.3 in)	41 of 100 (Notable)
Saint Johns	United States	Record high minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Santa Isabel Do Rio Preto	Brazil	Record daily precipitation	59.0 mm (2.3 in)	40 of 100 (Notable)
Sweet Springs	United States	Record daily precipitation	109.2 mm (4.3 in)	40 of 100 (Notable)

Counts by Type and Timescale

1,163 records

Records set or tied on 21 April 1973 by type: Highest daily maximum 92, Lowest daily maximum 85, Highest daily minimum 535, Lowest daily minimum 58, Heaviest daily rainfall 350, Heaviest daily snowfall 30, Deepest snow cover 13.

Records on 21 April 1973 by type
Record type	Records
Highest daily maximum	92
Lowest daily maximum	85
Highest daily minimum	535
Lowest daily minimum	58
Heaviest daily rainfall	350
Heaviest daily snowfall	30
Deepest snow cover	13

Records on 21 April 1973 by timescale: all-time 4, monthly 55, daily 1,104.

How Much Records Were Beaten By

954 broken records

Margins by which the 954 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 590.0. Ties are not counted.

Top 20 by Significance

21 April 1973

Top 20 records on 21 April 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1973	Marshall, US	monthly rain	149.1 mm (5.9 in)	55.6 mm (2.2 in)	61 years	76 of 100 (Major)
21 April 1973	Beloit, US	monthly rain	99.1 mm (3.9 in)	32.8 mm (1.3 in)	64 years	73 of 100 (Major)
21 April 1973	Mt Pleasant 1 SW, US	daily rain	63.5 mm (2.5 in)	47.0 mm (1.9 in)	79 years	71 of 100 (Major)
21 April 1973	Poplar 2 E, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	79 years	68 of 100 (Major)
21 April 1973	Morrison, US	monthly rain	101.6 mm (4.0 in)	33.0 mm (1.3 in)	53 years	65 of 100 (Major)
21 April 1973	Madison, US	all-time rain	228.6 mm (9.0 in)	92.7 mm (3.6 in)	5 years	65 of 100 (Major)
21 April 1973	Washington, US	daily rain	61.0 mm (2.4 in)	35.6 mm (1.4 in)	79 years	64 of 100 (Major)
21 April 1973	Aledo, US	monthly rain	123.7 mm (4.9 in)	52.6 mm (2.1 in)	17 years	62 of 100 (Major)
21 April 1973	Muscatine 2, US	daily rain	57.9 mm (2.3 in)	33.0 mm (1.3 in)	68 years	62 of 100 (Major)
21 April 1973	Steffenville, US	daily rain	80.8 mm (3.2 in)	45.2 mm (1.8 in)	44 years	61 of 100 (Major)
21 April 1973	Dorado 2 WNW, PR	monthly rain	139.7 mm (5.5 in)	66.8 mm (2.6 in)	21 years	60 of 100 (Major)
21 April 1973	Keosauqua, US	monthly rain	106.7 mm (4.2 in)	50.3 mm (2.0 in)	9 years	60 of 100 (Major)
21 April 1973	Waukesha Wwtp, US	monthly rain	85.6 mm (3.4 in)	30.5 mm (1.2 in)	16 years	60 of 100 (Major)
21 April 1973	Bloomfield, US	monthly rain	101.6 mm (4.0 in)	27.9 mm (1.1 in)	52 years	59 of 100 (Notable)
21 April 1973	Crow Agency, US	daily snow depth	58.4 cm (23.0 in)	58.4 cm (23.0 in)	74 years	59 of 100 (Notable)
21 April 1973	Quincy Mem Brg, US	daily rain	98.6 mm (3.9 in)	60.0 mm (2.4 in)	36 years	58 of 100 (Notable)
21 April 1973	Windsor, US	monthly rain	159.5 mm (6.3 in)	65.0 mm (2.6 in)	2 years	58 of 100 (Notable)
21 April 1973	Palmyra, US	daily rain	82.3 mm (3.2 in)	44.2 mm (1.7 in)	36 years	57 of 100 (Notable)
21 April 1973	Shelbina, US	monthly rain	128.8 mm (5.1 in)	46.2 mm (1.8 in)	3 years	57 of 100 (Notable)
21 April 1973	Moline Quad City Intl AP, US	monthly rain	108.2 mm (4.3 in)	45.2 mm (1.8 in)	13 years	57 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 1973

Records set or tied on this calendar date in each year from 1793 to 1973. 1973 had 1,163 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 1973-04-21: 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 2026-10-13 (13 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 100	945
100 to 200	2
200 to 300	3
300 to 400	0
400 to 500	2
500 to 600	2