Weather Records on 21 April 1940

462 weather records were set or tied worldwide on 21 April 1940. Highest significance: Glendive, US.

Key Facts for 21 April 1940

On 21 April 1940, 462 weather records were set or tied at long-record stations worldwide.
93 were record highs and 224 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 448 daily.
Glendive set a monthly record daily precipitation of 50.8 mm (2.0 in) on 21 April 1940.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

462 stations

462 station records on 21 April 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Glendive	United States	Record daily precipitation	50.8 mm (2.0 in)	56 of 100 (Notable)
Wolfville	Canada	Record daily snowfall	36.1 cm (14.2 in)	55 of 100 (Notable)
Mildred	United States	Record daily precipitation	36.3 mm (1.4 in)	51 of 100 (Notable)
De Ruyter 4 N	United States	Record daily precipitation	38.4 mm (1.5 in)	50 of 100 (Notable)
Mott	United States	Record daily precipitation	30.7 mm (1.2 in)	49 of 100 (Notable)
Beach	United States	Record daily precipitation	25.7 mm (1.0 in)	47 of 100 (Notable)
Saint John	Canada	Record daily snowfall	20.3 cm (8.0 in)	46 of 100 (Notable)
Lethbridge Cda	Canada	Record daily precipitation	38.1 mm (1.5 in)	41 of 100 (Notable)
Somwarpet	India	Record daily precipitation	32.3 mm (1.3 in)	41 of 100 (Notable)
Millinocket	United States	Record daily precipitation	44.2 mm (1.7 in)	41 of 100 (Notable)
Charlottetown Cda	Canada	Record daily snowfall	29.2 cm (11.5 in)	39 of 100 (Notable)
Moncton	Canada	Record daily snowfall	25.4 cm (10.0 in)	37 of 100 (Notable)
Hiriyur	India	Record daily precipitation	59.9 mm (2.4 in)	36 of 100 (Notable)
Satyamangalam	India	Record daily precipitation	83.1 mm (3.3 in)	35 of 100 (Notable)
Sussex	Canada	Record daily snowfall	17.0 cm (6.7 in)	34 of 100 (Routine)
Wolfville	Canada	Record daily precipitation	36.1 mm (1.4 in)	34 of 100 (Routine)
Newark Liberty Intl AP	United States	Record low maximum temperature	4.4 C (39.9 F)	34 of 100 (Routine)
Moncton	Canada	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Sable Island	Canada	Record daily precipitation	31.5 mm (1.2 in)	33 of 100 (Routine)
New England	United States	Record daily precipitation	47.8 mm (1.9 in)	33 of 100 (Routine)
Little Falls City Rsch	United States	Record daily snowfall	7.6 cm (3.0 in)	32 of 100 (Routine)
Cape May 2 NW	United States	Record low maximum temperature	6.7 C (44.1 F)	30 of 100 (Routine)
World Trade Ctr	United States	Record low maximum temperature	5.0 C (41.0 F)	30 of 100 (Routine)
Hettinger	United States	Record daily precipitation	25.7 mm (1.0 in)	30 of 100 (Routine)
Sherburne	United States	Record daily precipitation	45.0 mm (1.8 in)	29 of 100 (Routine)
Atlantic City Marina	United States	Record low maximum temperature	6.1 C (43.0 F)	29 of 100 (Routine)
Washington	United States	Record low maximum temperature	8.3 C (46.9 F)	29 of 100 (Routine)
Ny City Cntrl Park	United States	Record low maximum temperature	4.4 C (39.9 F)	29 of 100 (Routine)
Alattur	India	Record daily precipitation	71.1 mm (2.8 in)	28 of 100 (Routine)
Lewiston	United States	Record daily precipitation	27.4 mm (1.1 in)	28 of 100 (Routine)
Portland	United States	Record low maximum temperature	2.2 C (36.0 F)	28 of 100 (Routine)
Trenton 2	United States	Record low maximum temperature	6.1 C (43.0 F)	28 of 100 (Routine)
Fredericton Unb	Canada	Record daily snowfall	12.7 cm (5.0 in)	27 of 100 (Routine)
Nashua 2 NNW	United States	Record low maximum temperature	2.2 C (36.0 F)	27 of 100 (Routine)
Ft Myers Page Fld AP	United States	Record low maximum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Ekaterinburg	Russia	Record high minimum temperature	10.8 C (51.4 F)	26 of 100 (Routine)
Philadelphia City	United States	Record low maximum temperature	6.7 C (44.1 F)	26 of 100 (Routine)
Coloso	Puerto Rico [United States]	Record high maximum temperature	33.9 C (93.0 F)	25 of 100 (Routine)
Moorestown 4 E	United States	Record low maximum temperature	5.6 C (42.1 F)	25 of 100 (Routine)
Harrisburg River Gage	United States	Record daily precipitation	25.9 mm (1.0 in)	25 of 100 (Routine)
Plauen	Germany	Record high maximum temperature	23.5 C (74.3 F)	24 of 100 (Routine)
Sholingur	India	Record daily precipitation	34.3 mm (1.4 in)	24 of 100 (Routine)
Gangajalghati	India	Record daily precipitation	25.1 mm (1.0 in)	24 of 100 (Routine)
Warwick	United States	Record daily precipitation	31.2 mm (1.2 in)	24 of 100 (Routine)
Mt Pocono 2 N	United States	Record daily snowfall	5.1 cm (2.0 in)	24 of 100 (Routine)
Gorlitz	Germany	Record high maximum temperature	22.9 C (73.2 F)	23 of 100 (Routine)
Lake Cochituate	United States	Record low maximum temperature	2.8 C (37.0 F)	23 of 100 (Routine)
Perm	Russia	Record high minimum temperature	10.9 C (51.6 F)	22 of 100 (Routine)
Gardiner	United States	Record daily precipitation	29.2 mm (1.1 in)	22 of 100 (Routine)
Great Falls	United States	Record low maximum temperature	8.3 C (46.9 F)	22 of 100 (Routine)
Savage	United States	Record daily precipitation	31.5 mm (1.2 in)	22 of 100 (Routine)
University Exp STN	United States	Record high maximum temperature	20.0 C (68.0 F)	22 of 100 (Routine)
Maunawili Rch	United States	Record high maximum temperature	28.9 C (84.0 F)	22 of 100 (Routine)
Caguas	Puerto Rico [United States]	Record high maximum temperature	35.0 C (95.0 F)	21 of 100 (Routine)
Farmington	United States	Record daily precipitation	30.5 mm (1.2 in)	21 of 100 (Routine)
Houlton	United States	Record low maximum temperature	1.1 C (34.0 F)	21 of 100 (Routine)
Albion	United States	Record high minimum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Indian Mills 2 W	United States	Record low maximum temperature	5.0 C (41.0 F)	21 of 100 (Routine)
Lancaster 2 NE Pump St	United States	Record low maximum temperature	7.8 C (46.0 F)	21 of 100 (Routine)
Aiken 5SE	United States	Record low maximum temperature	11.1 C (52.0 F)	21 of 100 (Routine)

Counts by Type and Timescale

462 records

Records set or tied on 21 April 1940 by type: Highest daily maximum 52, Lowest daily maximum 180, Highest daily minimum 41, Lowest daily minimum 44, Heaviest daily rainfall 130, Heaviest daily snowfall 14, Deepest snow cover 1.

Records on 21 April 1940 by type
Record type	Records
Highest daily maximum	52
Lowest daily maximum	180
Highest daily minimum	41
Lowest daily minimum	44
Heaviest daily rainfall	130
Heaviest daily snowfall	14
Deepest snow cover	1

Records on 21 April 1940 by timescale: all-time 0, monthly 14, daily 448.

How Much Records Were Beaten By

401 broken records

Margins by which the 401 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 190.0. Ties are not counted.

Top 20 by Significance

21 April 1940

Top 20 records on 21 April 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1940	Glendive, US	monthly rain	50.8 mm (2.0 in)	21.6 mm (0.9 in)	7 years	56 of 100 (Notable)
21 April 1940	Wolfville, CA	monthly snowfall	36.1 cm (14.2 in)	13.2 cm (5.2 in)	36 years	55 of 100 (Notable)
21 April 1940	Mildred, US	daily rain	36.3 mm (1.4 in)	33.3 mm (1.3 in)	29 years	51 of 100 (Notable)
21 April 1940	De Ruyter 4 N, US	daily rain	38.4 mm (1.5 in)	23.9 mm (0.9 in)	35 years	50 of 100 (Notable)
21 April 1940	Mott, US	daily rain	30.7 mm (1.2 in)	26.6 mm (1.0 in)	20 years	49 of 100 (Notable)
21 April 1940	Beach, US	daily rain	25.7 mm (1.0 in)	22.9 mm (0.9 in)	20 years	47 of 100 (Notable)
21 April 1940	Saint John, CA	daily snowfall	20.3 cm (8.0 in)	10.1 cm (4.0 in)	65 years	46 of 100 (Notable)
21 April 1940	Lethbridge Cda, CA	monthly rain	38.1 mm (1.5 in)	12.4 mm (0.5 in)	7 years	41 of 100 (Notable)
21 April 1940	Somwarpet, IN	daily rain	32.3 mm (1.3 in)	29.5 mm (1.2 in)	22 years	41 of 100 (Notable)
21 April 1940	Millinocket, US	daily rain	44.2 mm (1.7 in)	30.5 mm (1.2 in)	22 years	41 of 100 (Notable)
21 April 1940	Charlottetown Cda, CA	daily snowfall	29.2 cm (11.5 in)	19.0 cm (7.5 in)	14 years	39 of 100 (Notable)
21 April 1940	Moncton, CA	monthly snowfall	25.4 cm (10.0 in)	5.1 cm (2.0 in)	32 years	37 of 100 (Notable)
21 April 1940	Hiriyur, IN	monthly rain	59.9 mm (2.4 in)	14.2 mm (0.6 in)	32 years	36 of 100 (Notable)
21 April 1940	Satyamangalam, IN	monthly rain	83.1 mm (3.3 in)	19.9 mm (0.8 in)	20 years	35 of 100 (Notable)
21 April 1940	Sussex, CA	daily snowfall	17.0 cm (6.7 in)	9.4 cm (3.7 in)	36 years	34 of 100 (Routine)
21 April 1940	Wolfville, CA	daily rain	36.1 mm (1.4 in)	13.2 mm (0.5 in)	36 years	34 of 100 (Routine)
21 April 1940	Newark Liberty Intl AP, US	daily low max	4.4 C (39.9 F)	0.6 C (1.1 F)	82 years	34 of 100 (Routine)
21 April 1940	Moncton, CA	daily rain	25.4 mm (1.0 in)	12.4 mm (0.5 in)	36 years	33 of 100 (Routine)
21 April 1940	Sable Island, CA	daily rain	31.5 mm (1.2 in)	18.0 mm (0.7 in)	29 years	33 of 100 (Routine)
21 April 1940	New England, US	monthly rain	47.8 mm (1.9 in)	10.0 mm (0.4 in)	4 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 1940

Records set or tied on this calendar date in each year from 1793 to 1940. 1940 had 462 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 1940-04-21: 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	386
25 to 50	7
50 to 75	2
75 to 100	3
100 to 125	1
125 to 150	1
150 to 175	0
175 to 200	1