Weather Records on 21 April 1956

497 weather records were set or tied worldwide on 21 April 1956. Highest significance: Kowanyama Airport, AU.

Key Facts for 21 April 1956

On 21 April 1956, 497 weather records were set or tied at long-record stations worldwide.
96 were record highs and 232 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 12 monthly and 485 daily.
Kowanyama Airport set a daily record precipitation of 100.3 mm (3.9 in) on 21 April 1956.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

497 stations

497 station records on 21 April 1956 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1956: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kowanyama Airport	Australia	Record daily precipitation	100.3 mm (3.9 in)	48 of 100 (Notable)
Upper Stewiacke	Canada	Record daily precipitation	37.1 mm (1.5 in)	48 of 100 (Notable)
Upper Stewiacke	Canada	Record daily snowfall	20.3 cm (8.0 in)	46 of 100 (Notable)
Maniwaki 2	Canada	Record daily snowfall	14.0 cm (5.5 in)	39 of 100 (Notable)
Masset Airport	Canada	Record high maximum temperature	22.2 C (72.0 F)	36 of 100 (Notable)
Lambton	Canada	Record daily snowfall	13.0 cm (5.1 in)	35 of 100 (Notable)
Durham	Canada	Record daily snowfall	5.1 cm (2.0 in)	34 of 100 (Routine)
Kualapuu 534	United States	Record daily precipitation	30.7 mm (1.2 in)	32 of 100 (Routine)
Princetown	Australia	Record daily precipitation	30.5 mm (1.2 in)	29 of 100 (Routine)
St Lin des Laurentides	Canada	Record daily snowfall	6.4 cm (2.5 in)	29 of 100 (Routine)
Farmville	United States	Record low minimum temperature	-5.6 C (21.9 F)	29 of 100 (Routine)
Wilkawatt Post Office	Australia	Record daily precipitation	33.0 mm (1.3 in)	28 of 100 (Routine)
Salisbury	United States	Record low minimum temperature	-2.2 C (28.0 F)	28 of 100 (Routine)
Blackville 3 W	United States	Record low minimum temperature	1.1 C (34.0 F)	28 of 100 (Routine)
Aberdeen	United States	Record high maximum temperature	28.9 C (84.0 F)	28 of 100 (Routine)
Huntington 1	United States	Record low minimum temperature	-4.4 C (24.1 F)	28 of 100 (Routine)
Ketchikan AP	United States	Record high minimum temperature	9.4 C (48.9 F)	28 of 100 (Routine)
Prince Rupert	Canada	Record high maximum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Hambantota	Sri Lanka	Record high minimum temperature	27.7 C (81.9 F)	27 of 100 (Routine)
Henderson 2 NNW	United States	Record low minimum temperature	-2.8 C (27.0 F)	27 of 100 (Routine)
Louisburg	United States	Record low minimum temperature	-3.3 C (26.1 F)	27 of 100 (Routine)
Newport News Press Bld	United States	Record low minimum temperature	-3.3 C (26.1 F)	27 of 100 (Routine)
Clearwater	United States	Record high maximum temperature	27.2 C (81.0 F)	27 of 100 (Routine)
Ketchikan AP	United States	Record high maximum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
Krishnarajnagar	India	Record daily precipitation	30.5 mm (1.2 in)	26 of 100 (Routine)
Concrete Ppl Fish STN	United States	Record high minimum temperature	12.8 C (55.0 F)	26 of 100 (Routine)
Sedro-Woolley	United States	Record high minimum temperature	12.2 C (54.0 F)	26 of 100 (Routine)
Greenville Wtp	United States	Record low minimum temperature	-6.7 C (19.9 F)	25 of 100 (Routine)
Grafton 1 NE	United States	Record low minimum temperature	-7.2 C (19.0 F)	25 of 100 (Routine)
New Martinsville 4 NNE	United States	Record low minimum temperature	-4.4 C (24.1 F)	25 of 100 (Routine)
Annex Creek	United States	Record high maximum temperature	21.1 C (70.0 F)	25 of 100 (Routine)
Tumbarumba Post Office	Australia	Record daily precipitation	28.7 mm (1.1 in)	24 of 100 (Routine)
Uniao Dos Palmares	Brazil	Record daily precipitation	63.0 mm (2.5 in)	24 of 100 (Routine)
Mill Bay	Canada	Record high minimum temperature	8.3 C (46.9 F)	24 of 100 (Routine)
Kamennaja-Step	Russia	Record high minimum temperature	11.8 C (53.2 F)	24 of 100 (Routine)
College Park	United States	Record low minimum temperature	-3.9 C (25.0 F)	24 of 100 (Routine)
Princess Anne	United States	Record low minimum temperature	-4.4 C (24.1 F)	24 of 100 (Routine)
Trenton	United States	Record high maximum temperature	30.6 C (87.1 F)	24 of 100 (Routine)
Trenton 2	United States	Record low minimum temperature	-1.7 C (28.9 F)	24 of 100 (Routine)
Watertown	United States	Record low maximum temperature	3.3 C (37.9 F)	24 of 100 (Routine)
Huntingdon	United States	Record low minimum temperature	-5.6 C (21.9 F)	24 of 100 (Routine)
Columbia 2SSE	United States	Record low minimum temperature	-3.9 C (25.0 F)	24 of 100 (Routine)
Blaine	United States	Record high minimum temperature	10.0 C (50.0 F)	24 of 100 (Routine)
Romney 1 SW	United States	Record low minimum temperature	-6.1 C (21.0 F)	24 of 100 (Routine)
White Sulphur Springs	United States	Record low minimum temperature	-6.7 C (19.9 F)	24 of 100 (Routine)
James Island	Canada	Record high minimum temperature	12.2 C (54.0 F)	23 of 100 (Routine)
Szeged	Hungary	Record low minimum temperature	-1.2 C (29.8 F)	23 of 100 (Routine)
Valparaiso Wtr Wks	United States	Record low minimum temperature	-3.9 C (25.0 F)	23 of 100 (Routine)
Beatrice	United States	Record high maximum temperature	31.1 C (88.0 F)	23 of 100 (Routine)
Mt Airy 2 W	United States	Record low minimum temperature	-4.4 C (24.1 F)	23 of 100 (Routine)
Portsmouth-Sciotoville	United States	Record low minimum temperature	-2.2 C (28.0 F)	23 of 100 (Routine)
The Dalles	United States	Record high maximum temperature	31.1 C (88.0 F)	23 of 100 (Routine)
New Canton	United States	Record low minimum temperature	-5.0 C (23.0 F)	23 of 100 (Routine)
Quinault Rs	United States	Record high maximum temperature	28.3 C (82.9 F)	23 of 100 (Routine)
Creston	United States	Record low minimum temperature	-5.0 C (23.0 F)	23 of 100 (Routine)
Coen Post Office	Australia	Record daily precipitation	63.5 mm (2.5 in)	22 of 100 (Routine)
Biscotasing	Canada	Record daily snowfall	7.6 cm (3.0 in)	22 of 100 (Routine)
Kon-Kolodez	Russia	Record high minimum temperature	11.3 C (52.3 F)	22 of 100 (Routine)
Frankfort Downtown	United States	Record low minimum temperature	-1.7 C (28.9 F)	22 of 100 (Routine)
Moncure 3 SE	United States	Record low minimum temperature	-3.9 C (25.0 F)	22 of 100 (Routine)

Counts by Type and Timescale

497 records

Records set or tied on 21 April 1956 by type: Highest daily maximum 48, Lowest daily maximum 39, Highest daily minimum 48, Lowest daily minimum 193, Heaviest daily rainfall 135, Heaviest daily snowfall 31, Deepest snow cover 3.

Records on 21 April 1956 by type
Record type	Records
Highest daily maximum	48
Lowest daily maximum	39
Highest daily minimum	48
Lowest daily minimum	193
Heaviest daily rainfall	135
Heaviest daily snowfall	31
Deepest snow cover	3

Records on 21 April 1956 by timescale: all-time 0, monthly 12, daily 485.

How Much Records Were Beaten By

379 broken records

Margins by which the 379 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 178.0. Ties are not counted.

Top 20 by Significance

21 April 1956

Top 20 records on 21 April 1956 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1956	Kowanyama Airport, AU	daily rain	100.3 mm (3.9 in)	65.2 mm (2.6 in)	42 years	48 of 100 (Notable)
21 April 1956	Upper Stewiacke, CA	daily rain	37.1 mm (1.5 in)	29.2 mm (1.1 in)	14 years	48 of 100 (Notable)
21 April 1956	Upper Stewiacke, CA	monthly snowfall	20.3 cm (8.0 in)	7.6 cm (3.0 in)	36 years	46 of 100 (Notable)
21 April 1956	Maniwaki 2, CA	daily snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	42 years	39 of 100 (Notable)
21 April 1956	Masset Airport, CA	monthly high max	22.2 C (72.0 F)	1.6 C (2.9 F)	52 years	36 of 100 (Notable)
21 April 1956	Lambton, CA	daily snowfall	13.0 cm (5.1 in)	10.5 cm (4.1 in)	34 years	35 of 100 (Notable)
21 April 1956	Durham, CA	daily snowfall	5.1 cm (2.0 in)	3.8 cm (1.5 in)	55 years	34 of 100 (Routine)
21 April 1956	Kualapuu 534, US	daily rain	30.7 mm (1.2 in)	24.6 mm (1.0 in)	32 years	32 of 100 (Routine)
21 April 1956	Princetown, AU	daily rain	30.5 mm (1.2 in)	8.1 mm (0.32 in)	42 years	29 of 100 (Routine)
21 April 1956	St Lin des Laurentides, CA	daily snowfall	6.4 cm (2.5 in)	6.4 cm (2.5 in)	42 years	29 of 100 (Routine)
21 April 1956	Farmville, US	daily low min	-5.6 C (21.9 F)	3.4 C (6.1 F)	58 years	29 of 100 (Routine)
21 April 1956	Wilkawatt Post Office, AU	monthly rain	33.0 mm (1.3 in)	5.8 mm (0.23 in)	0 years	28 of 100 (Routine)
21 April 1956	Salisbury, US	daily low min	-2.2 C (28.0 F)	2.8 C (5.0 F)	58 years	28 of 100 (Routine)
21 April 1956	Blackville 3 W, US	daily low min	1.1 C (34.0 F)	2.8 C (5.0 F)	55 years	28 of 100 (Routine)
21 April 1956	Aberdeen, US	daily high max	28.9 C (84.0 F)	1.7 C (3.1 F)	60 years	28 of 100 (Routine)
21 April 1956	Huntington 1, US	daily low min	-4.4 C (24.1 F)	3.8 C (6.8 F)	52 years	28 of 100 (Routine)
21 April 1956	Ketchikan AP, US	monthly high min	9.4 C (48.9 F)	1.1 C (2.0 F)	38 years	28 of 100 (Routine)
21 April 1956	Prince Rupert, CA	monthly high max	23.3 C (73.9 F)	1.6 C (2.9 F)	31 years	27 of 100 (Routine)
21 April 1956	Hambantota, LK	daily high min	27.7 C (81.9 F)	0.9 C (1.6 F)	39 years	27 of 100 (Routine)
21 April 1956	Henderson 2 NNW, US	daily low min	-2.8 C (27.0 F)	2.2 C (4.0 F)	58 years	27 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 1956

Records set or tied on this calendar date in each year from 1793 to 1956. 1956 had 497 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 1956-04-21: 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).

Margin	Records
0 to 25	353
25 to 50	14
50 to 75	7
75 to 100	1
100 to 125	1
125 to 150	2
150 to 175	0
175 to 200	1