Weather Records on 21 April 1939

110 weather records were set or tied worldwide on 21 April 1939. Highest significance: Lugansk, UA.

Key Facts for 21 April 1939

On 21 April 1939, 110 weather records were set or tied at long-record stations worldwide.
46 were record highs and 20 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 107 daily.
Lugansk set a daily record precipitation of 27.4 mm (1.1 in) on 21 April 1939.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 464 records.

Record Map

110 stations

110 station records on 21 April 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lugansk	Ukraine	Record daily precipitation	27.4 mm (1.1 in)	45 of 100 (Notable)
Aleksandrovsk-Sahalinskij	Russia	Record high minimum temperature	4.2 C (39.6 F)	25 of 100 (Routine)
Bangalore	India	Record daily precipitation	34.0 mm (1.3 in)	24 of 100 (Routine)
Aleksandrovsk-Sahalinskij	Russia	Record high maximum temperature	14.8 C (58.6 F)	24 of 100 (Routine)
Ellore	India	Record daily precipitation	56.9 mm (2.2 in)	22 of 100 (Routine)
Timovskoe	Russia	Record high minimum temperature	5.0 C (41.0 F)	21 of 100 (Routine)
Hattiesburg 5SW	United States	Record low minimum temperature	2.2 C (36.0 F)	21 of 100 (Routine)
Selbu-Stubbe	Norway	Record daily precipitation	11.3 mm (0.4 in)	20 of 100 (Routine)
Kumily	India	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Rapalle	India	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Urjupinsk	Russia	Record daily precipitation	19.2 mm (0.8 in)	20 of 100 (Routine)
Coonamble (Pier Pier)	Australia	Record daily precipitation	41.4 mm (1.6 in)	20 of 100 (Routine)
Sherbrooke	Canada	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Bolaram	India	Record daily precipitation	12.2 mm (0.5 in)	20 of 100 (Routine)
Pavagada	India	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Loa	United States	Record high maximum temperature	23.9 C (75.0 F)	20 of 100 (Routine)
Ketty	India	Record daily precipitation	35.3 mm (1.4 in)	19 of 100 (Routine)
Gunnison 3SW	United States	Record high maximum temperature	24.4 C (75.9 F)	19 of 100 (Routine)
Jacksonville	United States	Record daily precipitation	10.9 mm (0.4 in)	19 of 100 (Routine)
Tropic	United States	Record high maximum temperature	27.2 C (81.0 F)	19 of 100 (Routine)
Madakasira	India	Record daily precipitation	16.8 mm (0.7 in)	18 of 100 (Routine)
Channarayapatna	India	Record daily precipitation	17.8 mm (0.7 in)	17 of 100 (Routine)
Sira	India	Record daily precipitation	14.7 mm (0.6 in)	17 of 100 (Routine)
Anchorage	United States	Record low maximum temperature	10.0 C (50.0 F)	17 of 100 (Routine)
Papaikou 144.1	United States	Record daily precipitation	83.8 mm (3.3 in)	17 of 100 (Routine)
Yellow Mountain	Australia	Record daily precipitation	13.2 mm (0.5 in)	16 of 100 (Routine)
Magadi	India	Record daily precipitation	16.0 mm (0.6 in)	16 of 100 (Routine)
Ponneri	India	Record daily precipitation	2.3 mm (0.09 in)	16 of 100 (Routine)
Astrakan	Russia	Record high minimum temperature	12.3 C (54.1 F)	16 of 100 (Routine)
Orenburg	Russia	Record high minimum temperature	9.3 C (48.7 F)	16 of 100 (Routine)
Sotchi	Russia	Record daily precipitation	34.7 mm (1.4 in)	16 of 100 (Routine)
Mohawk	United States	Record high maximum temperature	41.7 C (107.1 F)	16 of 100 (Routine)
San Jacinto	United States	Record high maximum temperature	26.1 C (79.0 F)	16 of 100 (Routine)
Addanki	India	Record daily precipitation	13.7 mm (0.5 in)	15 of 100 (Routine)
Sriperumbudur	India	Record daily precipitation	34.8 mm (1.4 in)	15 of 100 (Routine)
Myklebust I Breim	Norway	Record daily precipitation	15.3 mm (0.6 in)	15 of 100 (Routine)
Tarpon Spgs Sewage Plt	United States	Record low minimum temperature	6.7 C (44.1 F)	15 of 100 (Routine)
Caruthersville	United States	Record low minimum temperature	2.8 C (37.0 F)	15 of 100 (Routine)
Bosque del Apache	United States	Record low minimum temperature	-3.3 C (26.1 F)	15 of 100 (Routine)
Petropavlovskij Majak	Russia	Record high minimum temperature	0.3 C (32.5 F)	14 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record high minimum temperature	0.1 C (32.2 F)	14 of 100 (Routine)
Petropavlovsk-Kamchatskij	Russia	Record high minimum temperature	0.3 C (32.5 F)	14 of 100 (Routine)
Taganrog (Lighthouse)	Russia	Record daily precipitation	21.4 mm (0.8 in)	14 of 100 (Routine)
Mesa	United States	Record high maximum temperature	37.2 C (99.0 F)	14 of 100 (Routine)
Frankfort Downtown	United States	Record low maximum temperature	13.3 C (55.9 F)	14 of 100 (Routine)
Gann Valley 4NW	United States	Record high maximum temperature	31.1 C (88.0 F)	14 of 100 (Routine)
Snowtown	Australia	Record low minimum temperature	3.9 C (39.0 F)	13 of 100 (Routine)
Emsdale	Canada	Record daily precipitation	18.8 mm (0.7 in)	13 of 100 (Routine)
Kanigiri	India	Record daily precipitation	14.0 mm (0.6 in)	13 of 100 (Routine)
Boulder	United States	Record high minimum temperature	12.2 C (54.0 F)	13 of 100 (Routine)
Taylorsville 2SW	United States	Record low maximum temperature	13.3 C (55.9 F)	13 of 100 (Routine)
Red Lodge	United States	Record high maximum temperature	21.7 C (71.1 F)	13 of 100 (Routine)
Proddatur	India	Record daily precipitation	6.1 mm (0.24 in)	12 of 100 (Routine)
Huntingburg AP	United States	Record low maximum temperature	12.8 C (55.0 F)	12 of 100 (Routine)
Ishpeming	United States	Record daily precipitation	18.3 mm (0.7 in)	12 of 100 (Routine)
Hallock	United States	Record low minimum temperature	-9.4 C (15.1 F)	12 of 100 (Routine)
Ongole	India	Record daily precipitation	21.6 mm (0.9 in)	11 of 100 (Routine)
Srivilliputhur	India	Record daily precipitation	18.0 mm (0.7 in)	11 of 100 (Routine)
Holter Dam	United States	Record high maximum temperature	25.0 C (77.0 F)	11 of 100 (Routine)
Ervay	United States	Record high maximum temperature	21.7 C (71.1 F)	11 of 100 (Routine)

Counts by Type and Timescale

110 records

Records set or tied on 21 April 1939 by type: Highest daily maximum 34, Lowest daily maximum 9, Highest daily minimum 12, Lowest daily minimum 11, Heaviest daily rainfall 43, Deepest snow cover 1.

Records on 21 April 1939 by type
Record type	Records
Highest daily maximum	34
Lowest daily maximum	9
Highest daily minimum	12
Lowest daily minimum	11
Heaviest daily rainfall	43
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 21 April 1939 by timescale: all-time 0, monthly 3, daily 107.

How Much Records Were Beaten By

89 broken records

Margins by which the 89 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 30.5. Ties are not counted.

Top 20 by Significance

21 April 1939

Top 20 records on 21 April 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1939	Lugansk, UA	daily rain	27.4 mm (1.1 in)	18.1 mm (0.7 in)	5 years	45 of 100 (Notable)
21 April 1939	Aleksandrovsk-Sahalinskij, RU	daily high min	4.2 C (39.6 F)	2.2 C (4.0 F)	55 years	25 of 100 (Routine)
21 April 1939	Bangalore, IN	daily rain	34.0 mm (1.3 in)	17.2 mm (0.7 in)	33 years	24 of 100 (Routine)
21 April 1939	Aleksandrovsk-Sahalinskij, RU	daily high max	14.8 C (58.6 F)	3.4 C (6.1 F)	40 years	24 of 100 (Routine)
21 April 1939	Ellore, IN	monthly rain	56.9 mm (2.2 in)	6.1 mm (0.24 in)	13 years	22 of 100 (Routine)
21 April 1939	Timovskoe, RU	monthly high min	5.0 C (41.0 F)	0.5 C (0.9 F)	20 years	21 of 100 (Routine)
21 April 1939	Hattiesburg 5SW, US	daily low min	2.2 C (36.0 F)	2.2 C (4.0 F)	43 years	21 of 100 (Routine)
21 April 1939	Selbu-Stubbe, NO	daily rain	11.3 mm (0.4 in)	4.6 mm (0.18 in)	24 years	20 of 100 (Routine)
21 April 1939	Kumily, IN	daily rain	23.6 mm (0.9 in)	17.2 mm (0.7 in)	18 years	20 of 100 (Routine)
21 April 1939	Rapalle, IN	daily rain	24.4 mm (1.0 in)	15.0 mm (0.6 in)	29 years	20 of 100 (Routine)
21 April 1939	Urjupinsk, RU	daily rain	19.2 mm (0.8 in)	2.7 mm (0.11 in)	36 years	20 of 100 (Routine)
21 April 1939	Coonamble (Pier Pier), AU	daily rain	41.4 mm (1.6 in)	5.8 mm (0.23 in)	37 years	20 of 100 (Routine)
21 April 1939	Sherbrooke, CA	daily rain	14.2 mm (0.6 in)	3.5 mm (0.14 in)	33 years	20 of 100 (Routine)
21 April 1939	Bolaram, IN	daily rain	12.2 mm (0.5 in)	9.7 mm (0.38 in)	32 years	20 of 100 (Routine)
21 April 1939	Pavagada, IN	daily rain	10.2 mm (0.4 in)	10.2 mm (0.4 in)	37 years	20 of 100 (Routine)
21 April 1939	Loa, US	daily high max	23.9 C (75.0 F)	1.7 C (3.1 F)	44 years	20 of 100 (Routine)
21 April 1939	Ketty, IN	daily rain	35.3 mm (1.4 in)	8.1 mm (0.32 in)	33 years	19 of 100 (Routine)
21 April 1939	Gunnison 3SW, US	daily high max	24.4 C (75.9 F)	2.2 C (4.0 F)	38 years	19 of 100 (Routine)
21 April 1939	Jacksonville, US	daily rain	10.9 mm (0.4 in)	3.3 mm (0.13 in)	30 years	19 of 100 (Routine)
21 April 1939	Tropic, US	daily high max	27.2 C (81.0 F)	2.2 C (4.0 F)	39 years	19 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 1939

Records set or tied on this calendar date in each year from 1793 to 1939. 1939 had 110 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 1939-04-21: 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 5	66
5 to 10	9
10 to 15	7
15 to 20	5
20 to 25	1
25 to 30	0
30 to 35	1