Weather Records on 21 April 1951

884 weather records were set or tied worldwide on 21 April 1951. Highest significance: Hampton, US.

Key Facts for 21 April 1951

On 21 April 1951, 884 weather records were set or tied at long-record stations worldwide.
43 were record highs and 457 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 873 daily.
Hampton set a daily record precipitation of 35.1 mm (1.4 in) on 21 April 1951.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

884 stations

884 station records on 21 April 1951 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1951: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hampton	United States	Record daily precipitation	35.1 mm (1.4 in)	55 of 100 (Notable)
Beloit	United States	Record daily precipitation	51.8 mm (2.0 in)	52 of 100 (Notable)
York	United States	Record daily precipitation	52.1 mm (2.1 in)	45 of 100 (Notable)
Lumding	India	Record daily precipitation	81.0 mm (3.2 in)	44 of 100 (Notable)
Barkly West (Tnk)	South Africa	Record daily precipitation	36.8 mm (1.4 in)	44 of 100 (Notable)
Blair	United States	Record daily precipitation	45.7 mm (1.8 in)	43 of 100 (Notable)
Pinawa	Canada	Record daily snowfall	11.9 cm (4.7 in)	42 of 100 (Notable)
Fairbury 7S	United States	Record daily precipitation	35.1 mm (1.4 in)	41 of 100 (Notable)
Risnes I Fjotland	Norway	Record snow depth	112.0 cm (44.1 in)	40 of 100 (Notable)
Miles City	United States	Record daily snowfall	8.1 cm (3.2 in)	40 of 100 (Notable)
Mahalapye	Botswana	Record daily precipitation	121.9 mm (4.8 in)	39 of 100 (Notable)
Mykland	Norway	Record snow depth	146.0 cm (57.5 in)	39 of 100 (Notable)
Setlagodi (Pol)	South Africa	Record daily precipitation	38.1 mm (1.5 in)	39 of 100 (Notable)
Twyfelspoort	South Africa	Record daily precipitation	32.0 mm (1.3 in)	39 of 100 (Notable)
Donkerhoek-Rainhill	South Africa	Record daily precipitation	38.9 mm (1.5 in)	39 of 100 (Notable)
Pearlington	United States	Record daily precipitation	116.6 mm (4.6 in)	39 of 100 (Notable)
Dillon U of Montana Western	United States	Record low minimum temperature	-13.3 C (8.1 F)	38 of 100 (Notable)
Itaete (Iguacu)	Brazil	Record daily precipitation	63.5 mm (2.5 in)	37 of 100 (Notable)
Hillsdown	Canada	Record low minimum temperature	-17.8 C (0.0 F)	36 of 100 (Notable)
Syferfontein	South Africa	Record daily precipitation	28.2 mm (1.1 in)	36 of 100 (Notable)
Buffelshoek	South Africa	Record daily precipitation	34.3 mm (1.4 in)	36 of 100 (Notable)
Arlington	United States	Record low minimum temperature	-5.6 C (21.9 F)	36 of 100 (Notable)
Klintonel	Canada	Record low minimum temperature	-19.4 C (-2.9 F)	35 of 100 (Notable)
Raiganj	India	Record daily precipitation	76.2 mm (3.0 in)	35 of 100 (Notable)
Potchefstroom Upper	South Africa	Record daily precipitation	28.2 mm (1.1 in)	35 of 100 (Notable)
New Hampton	United States	Record daily precipitation	33.8 mm (1.3 in)	35 of 100 (Notable)
Oakdale	United States	Record daily precipitation	36.1 mm (1.4 in)	35 of 100 (Notable)
Wallowa	United States	Record low minimum temperature	-11.7 C (10.9 F)	35 of 100 (Notable)
Tekkali	India	Record daily precipitation	34.8 mm (1.4 in)	34 of 100 (Routine)
Webster City	United States	Record daily precipitation	28.7 mm (1.1 in)	34 of 100 (Routine)
Schuyler	United States	Record daily precipitation	42.7 mm (1.7 in)	34 of 100 (Routine)
Pomeroy	United States	Record low minimum temperature	-7.2 C (19.0 F)	34 of 100 (Routine)
Potchefstroom	South Africa	Record daily precipitation	29.5 mm (1.2 in)	33 of 100 (Routine)
Cawker City	United States	Record daily precipitation	28.2 mm (1.1 in)	33 of 100 (Routine)
Kearney 4 NE	United States	Record daily precipitation	41.1 mm (1.6 in)	33 of 100 (Routine)
Cairo 3N	United States	Record daily precipitation	62.0 mm (2.4 in)	33 of 100 (Routine)
Cudgewa North	Australia	Record daily precipitation	35.6 mm (1.4 in)	32 of 100 (Routine)
Nossa Senhora da Gloria	Brazil	Record daily precipitation	83.0 mm (3.3 in)	32 of 100 (Routine)
Mocambo	Brazil	Record daily precipitation	80.3 mm (3.2 in)	32 of 100 (Routine)
Pekisko	Canada	Record low minimum temperature	-24.4 C (-11.9 F)	32 of 100 (Routine)
Gajapathinagaram	India	Record daily precipitation	45.2 mm (1.8 in)	32 of 100 (Routine)
Tuddal	Norway	Record snow depth	129.0 cm (50.8 in)	32 of 100 (Routine)
Roseau	United States	Record daily snowfall	5.1 cm (2.0 in)	32 of 100 (Routine)
Dayton 1 WSW	United States	Record low minimum temperature	-7.8 C (18.0 F)	32 of 100 (Routine)
Falls City Brenner Fld	United States	Record daily precipitation	39.6 mm (1.6 in)	32 of 100 (Routine)
Morgenrood	South Africa	Record daily precipitation	27.9 mm (1.1 in)	31 of 100 (Routine)
Mosita	South Africa	Record daily precipitation	26.4 mm (1.0 in)	31 of 100 (Routine)
Lichtenburg	South Africa	Record daily precipitation	31.0 mm (1.2 in)	31 of 100 (Routine)
Zwartruggens (Pol)	South Africa	Record daily precipitation	33.5 mm (1.3 in)	31 of 100 (Routine)
Upland 2NE	United States	Record daily precipitation	49.8 mm (2.0 in)	31 of 100 (Routine)
Prineville	United States	Record low minimum temperature	-12.2 C (10.0 F)	31 of 100 (Routine)
Brooks 1	Canada	Record low minimum temperature	-16.7 C (1.9 F)	30 of 100 (Routine)
Nes Pa Hedmark	Norway	Record snow depth	41.0 cm (16.1 in)	30 of 100 (Routine)
Moscow U of I	United States	Record low minimum temperature	-8.3 C (17.1 F)	30 of 100 (Routine)
Hallock	United States	Record daily snowfall	6.4 cm (2.5 in)	30 of 100 (Routine)
Philipsburg	United States	Record low minimum temperature	-15.0 C (5.0 F)	30 of 100 (Routine)
Valier	United States	Record low minimum temperature	-13.9 C (7.0 F)	30 of 100 (Routine)
Bradshaw	United States	Record daily precipitation	54.6 mm (2.1 in)	30 of 100 (Routine)
Mayville	United States	Record daily snowfall	5.1 cm (2.0 in)	30 of 100 (Routine)
Bolivar Wtr Wks	United States	Record daily precipitation	76.7 mm (3.0 in)	30 of 100 (Routine)

Counts by Type and Timescale

884 records

Records set or tied on 21 April 1951 by type: Highest daily maximum 13, Lowest daily maximum 206, Highest daily minimum 30, Lowest daily minimum 251, Heaviest daily rainfall 312, Heaviest daily snowfall 41, Deepest snow cover 31.

Records on 21 April 1951 by type
Record type	Records
Highest daily maximum	13
Lowest daily maximum	206
Highest daily minimum	30
Lowest daily minimum	251
Heaviest daily rainfall	312
Heaviest daily snowfall	41
Deepest snow cover	31

Records on 21 April 1951 by timescale: all-time 1, monthly 10, daily 873.

How Much Records Were Beaten By

776 broken records

Margins by which the 776 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 760.0. Ties are not counted.

Top 20 by Significance

21 April 1951

Top 20 records on 21 April 1951 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1951	Hampton, US	daily rain	35.1 mm (1.4 in)	25.4 mm (1.0 in)	57 years	55 of 100 (Notable)
21 April 1951	Beloit, US	daily rain	51.8 mm (2.0 in)	41.9 mm (1.6 in)	28 years	52 of 100 (Notable)
21 April 1951	York, US	daily rain	52.1 mm (2.1 in)	39.7 mm (1.6 in)	28 years	45 of 100 (Notable)
21 April 1951	Lumding, IN	daily rain	81.0 mm (3.2 in)	42.9 mm (1.7 in)	1 year	44 of 100 (Notable)
21 April 1951	Barkly West (Tnk), ZA	daily rain	36.8 mm (1.4 in)	26.9 mm (1.1 in)	36 years	44 of 100 (Notable)
21 April 1951	Blair, US	daily rain	45.7 mm (1.8 in)	26.9 mm (1.1 in)	38 years	43 of 100 (Notable)
21 April 1951	Pinawa, CA	daily snowfall	11.9 cm (4.7 in)	10.6 cm (4.2 in)	22 years	42 of 100 (Notable)
21 April 1951	Fairbury 7S, US	daily rain	35.1 mm (1.4 in)	21.4 mm (0.8 in)	52 years	41 of 100 (Notable)
21 April 1951	Risnes I Fjotland, NO	daily snow depth	112.0 cm (44.1 in)	49.0 cm (19.3 in)	33 years	40 of 100 (Notable)
21 April 1951	Miles City, US	daily snowfall	8.1 cm (3.2 in)	8.1 cm (3.2 in)	57 years	40 of 100 (Notable)
21 April 1951	Mahalapye, BW	all-time rain	121.9 mm (4.8 in)	16.0 mm (0.6 in)	3 years	39 of 100 (Notable)
21 April 1951	Mykland, NO	daily snow depth	146.0 cm (57.5 in)	76.0 cm (29.9 in)	33 years	39 of 100 (Notable)
21 April 1951	Setlagodi (Pol), ZA	daily rain	38.1 mm (1.5 in)	33.0 mm (1.3 in)	16 years	39 of 100 (Notable)
21 April 1951	Twyfelspoort, ZA	daily rain	32.0 mm (1.3 in)	29.5 mm (1.2 in)	16 years	39 of 100 (Notable)
21 April 1951	Donkerhoek-Rainhill, ZA	daily rain	38.9 mm (1.5 in)	33.3 mm (1.3 in)	28 years	39 of 100 (Notable)
21 April 1951	Pearlington, US	daily rain	116.6 mm (4.6 in)	76.0 mm (3.0 in)	1 year	39 of 100 (Notable)
21 April 1951	Dillon U of Montana Western, US	daily low min	-13.3 C (8.1 F)	6.6 C (11.9 F)	55 years	38 of 100 (Notable)
21 April 1951	Itaete (Iguacu), BR	daily rain	63.5 mm (2.5 in)	42.3 mm (1.7 in)	0 years	37 of 100 (Notable)
21 April 1951	Hillsdown, CA	daily low min	-17.8 C (0.0 F)	11.1 C (20.0 F)	36 years	36 of 100 (Notable)
21 April 1951	Syferfontein, ZA	daily rain	28.2 mm (1.1 in)	23.6 mm (0.9 in)	34 years	36 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 1951

Records set or tied on this calendar date in each year from 1793 to 1951. 1951 had 884 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 1951-04-21: 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 100	761
100 to 200	5
200 to 300	1
300 to 400	3
400 to 500	5
500 to 600	0
600 to 700	0
700 to 800	1