Weather Records on 21 August 1939

630 weather records were set or tied worldwide on 21 August 1939. Highest significance: Satna, IN.

Key Facts for 21 August 1939

On 21 August 1939, 630 weather records were set or tied at long-record stations worldwide.
125 were record highs and 212 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 22 monthly and 607 daily.
Satna set a monthly record daily precipitation of 99.1 mm (3.9 in) on 21 August 1939.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 449 records.

Record Map

630 stations

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

Weather records on 21 August 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Satna	India	Record daily precipitation	99.1 mm (3.9 in)	61 of 100 (Major)
Beaufort West (Met)	South Africa	Record daily precipitation	25.9 mm (1.0 in)	58 of 100 (Notable)
Khamgaon	India	Record daily precipitation	78.7 mm (3.1 in)	54 of 100 (Notable)
Edalabad	India	Record daily precipitation	94.5 mm (3.7 in)	54 of 100 (Notable)
Erandol	India	Record daily precipitation	80.8 mm (3.2 in)	54 of 100 (Notable)
Parola	India	Record daily precipitation	82.6 mm (3.3 in)	54 of 100 (Notable)
Chandor	India	Record daily precipitation	77.5 mm (3.1 in)	54 of 100 (Notable)
Brakfontein	South Africa	Record daily precipitation	38.9 mm (1.5 in)	52 of 100 (Notable)
Malkapur	India	Record daily precipitation	109.7 mm (4.3 in)	51 of 100 (Notable)
Jalgaon	India	Record daily precipitation	79.5 mm (3.1 in)	49 of 100 (Notable)
Pottsville	United States	Record daily precipitation	83.8 mm (3.3 in)	48 of 100 (Notable)
Pachora	India	Record daily precipitation	114.8 mm (4.5 in)	47 of 100 (Notable)
Feodosiia	Ukraine	Record daily precipitation	43.9 mm (1.7 in)	47 of 100 (Notable)
Yaval	India	Record daily precipitation	59.7 mm (2.4 in)	46 of 100 (Notable)
Shegaon	India	Record daily precipitation	79.8 mm (3.1 in)	45 of 100 (Notable)
Mehkar	India	Record daily precipitation	104.1 mm (4.1 in)	44 of 100 (Notable)
Weilerswist-Lommersum	Germany	Record daily precipitation	27.5 mm (1.1 in)	43 of 100 (Notable)
Ahwa	India	Record daily precipitation	125.0 mm (4.9 in)	43 of 100 (Notable)
Bhadgaon	India	Record daily precipitation	82.8 mm (3.3 in)	43 of 100 (Notable)
Amalner	India	Record daily precipitation	57.4 mm (2.3 in)	43 of 100 (Notable)
Leeu Gamka (Sar)	South Africa	Record daily precipitation	29.2 mm (1.1 in)	43 of 100 (Notable)
Independence	United States	Record daily precipitation	75.7 mm (3.0 in)	43 of 100 (Notable)
Nandurbar	India	Record daily precipitation	38.1 mm (1.5 in)	42 of 100 (Notable)
Pine River 3 NE	United States	Record daily precipitation	126.7 mm (5.0 in)	42 of 100 (Notable)
Jamner	India	Record daily precipitation	100.6 mm (4.0 in)	41 of 100 (Notable)
Woods Point	Australia	Record daily precipitation	68.3 mm (2.7 in)	40 of 100 (Notable)
Dhulia	India	Record daily precipitation	70.4 mm (2.8 in)	40 of 100 (Notable)
Chopda	India	Record daily precipitation	67.8 mm (2.7 in)	40 of 100 (Notable)
Colac (Shire Office)	Australia	Record daily precipitation	34.0 mm (1.3 in)	39 of 100 (Notable)
La Crosse River	United States	Record daily precipitation	122.7 mm (4.8 in)	39 of 100 (Notable)
Great Brak River	South Africa	Record daily precipitation	25.9 mm (1.0 in)	38 of 100 (Notable)
Telhara	India	Record daily precipitation	43.2 mm (1.7 in)	36 of 100 (Notable)
Shirpur	India	Record daily precipitation	57.2 mm (2.3 in)	36 of 100 (Notable)
Gordon	United States	Record daily precipitation	48.3 mm (1.9 in)	36 of 100 (Notable)
Barkly	Australia	Record daily precipitation	27.7 mm (1.1 in)	35 of 100 (Notable)
Belgaum	India	Record daily precipitation	60.5 mm (2.4 in)	35 of 100 (Notable)
Sindkheda	India	Record daily precipitation	44.7 mm (1.8 in)	35 of 100 (Notable)
Aberdeen (Tnk)	South Africa	Record daily precipitation	25.4 mm (1.0 in)	34 of 100 (Routine)
Wolseley	Australia	Record daily precipitation	26.2 mm (1.0 in)	33 of 100 (Routine)
Cobden (Post Office)	Australia	Record daily precipitation	31.2 mm (1.2 in)	33 of 100 (Routine)
Gardiner	United States	Record daily precipitation	43.9 mm (1.7 in)	33 of 100 (Routine)
Beech Forest	Australia	Record daily precipitation	54.4 mm (2.1 in)	32 of 100 (Routine)
Navapur	India	Record daily precipitation	58.4 mm (2.3 in)	32 of 100 (Routine)
Shahada	India	Record daily precipitation	47.2 mm (1.9 in)	32 of 100 (Routine)
Decorah	United States	Record daily precipitation	63.2 mm (2.5 in)	32 of 100 (Routine)
Concord	United States	Record daily precipitation	29.5 mm (1.2 in)	32 of 100 (Routine)
Menasha	United States	Record daily precipitation	58.4 mm (2.3 in)	32 of 100 (Routine)
Sakri	India	Record daily precipitation	29.7 mm (1.2 in)	31 of 100 (Routine)
Sterling	South Africa	Record daily precipitation	34.5 mm (1.4 in)	31 of 100 (Routine)
Makrai	India	Record daily precipitation	142.5 mm (5.6 in)	30 of 100 (Routine)
Genoa	Italy	Record daily precipitation	59.8 mm (2.4 in)	30 of 100 (Routine)
Bucuresti Filaret	Romania	Record daily precipitation	40.3 mm (1.6 in)	30 of 100 (Routine)
Raver	India	Record daily precipitation	66.0 mm (2.6 in)	29 of 100 (Routine)
Bhusaval Sr	India	Record daily precipitation	80.0 mm (3.1 in)	29 of 100 (Routine)
Heywood Post Office	Australia	Record daily precipitation	38.6 mm (1.5 in)	28 of 100 (Routine)
Yeola	India	Record daily precipitation	50.3 mm (2.0 in)	28 of 100 (Routine)
Orebro	Sweden	Record high maximum temperature	26.0 C (78.8 F)	28 of 100 (Routine)
Appleton City	United States	Record low minimum temperature	8.9 C (48.0 F)	28 of 100 (Routine)
Madison Wb City	United States	Record low maximum temperature	17.8 C (64.0 F)	28 of 100 (Routine)
Terang	Australia	Record daily precipitation	33.3 mm (1.3 in)	27 of 100 (Routine)

Counts by Type and Timescale

630 records

Records set or tied on 21 August 1939 by type: Highest daily maximum 50, Lowest daily maximum 48, Highest daily minimum 75, Lowest daily minimum 164, Heaviest daily rainfall 293.

Records on 21 August 1939 by type
Record type	Records
Highest daily maximum	50
Lowest daily maximum	48
Highest daily minimum	75
Lowest daily minimum	164
Heaviest daily rainfall	293
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1939 by timescale: all-time 1, monthly 22, daily 607.

How Much Records Were Beaten By

529 broken records

Margins by which the 529 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 71.2. Ties are not counted.

Top 20 by Significance

21 August 1939

Top 20 records on 21 August 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1939	Satna, IN	monthly rain	99.1 mm (3.9 in)	35.6 mm (1.4 in)	28 years	61 of 100 (Major)
21 August 1939	Beaufort West (Met), ZA	daily rain	25.9 mm (1.0 in)	20.8 mm (0.8 in)	58 years	58 of 100 (Notable)
21 August 1939	Khamgaon, IN	daily rain	78.7 mm (3.1 in)	52.5 mm (2.1 in)	36 years	54 of 100 (Notable)
21 August 1939	Edalabad, IN	daily rain	94.5 mm (3.7 in)	64.0 mm (2.5 in)	36 years	54 of 100 (Notable)
21 August 1939	Erandol, IN	daily rain	80.8 mm (3.2 in)	54.9 mm (2.2 in)	36 years	54 of 100 (Notable)
21 August 1939	Parola, IN	daily rain	82.6 mm (3.3 in)	57.7 mm (2.3 in)	36 years	54 of 100 (Notable)
21 August 1939	Chandor, IN	daily rain	77.5 mm (3.1 in)	45.0 mm (1.8 in)	36 years	54 of 100 (Notable)
21 August 1939	Brakfontein, ZA	monthly rain	38.9 mm (1.5 in)	17.6 mm (0.7 in)	5 years	52 of 100 (Notable)
21 August 1939	Malkapur, IN	monthly rain	109.7 mm (4.3 in)	31.5 mm (1.2 in)	38 years	51 of 100 (Notable)
21 August 1939	Jalgaon, IN	daily rain	79.5 mm (3.1 in)	42.9 mm (1.7 in)	36 years	49 of 100 (Notable)
21 August 1939	Pottsville, US	daily rain	83.8 mm (3.3 in)	59.9 mm (2.4 in)	24 years	48 of 100 (Notable)
21 August 1939	Pachora, IN	monthly rain	114.8 mm (4.5 in)	38.6 mm (1.5 in)	5 years	47 of 100 (Notable)
21 August 1939	Feodosiia, UA	daily rain	43.9 mm (1.7 in)	27.7 mm (1.1 in)	17 years	47 of 100 (Notable)
21 August 1939	Yaval, IN	daily rain	59.7 mm (2.4 in)	44.0 mm (1.7 in)	17 years	46 of 100 (Notable)
21 August 1939	Shegaon, IN	daily rain	79.8 mm (3.1 in)	46.8 mm (1.8 in)	36 years	45 of 100 (Notable)
21 August 1939	Mehkar, IN	daily rain	104.1 mm (4.1 in)	50.8 mm (2.0 in)	36 years	44 of 100 (Notable)
21 August 1939	Weilerswist-Lommersum, DE	daily rain	27.5 mm (1.1 in)	19.1 mm (0.8 in)	30 years	43 of 100 (Notable)
21 August 1939	Ahwa, IN	daily rain	125.0 mm (4.9 in)	71.2 mm (2.8 in)	36 years	43 of 100 (Notable)
21 August 1939	Bhadgaon, IN	daily rain	82.8 mm (3.3 in)	46.0 mm (1.8 in)	14 years	43 of 100 (Notable)
21 August 1939	Amalner, IN	daily rain	57.4 mm (2.3 in)	33.3 mm (1.3 in)	30 years	43 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

1800 to 1939

Records set or tied on this calendar date in each year from 1800 to 1939. 1939 had 630 records.

Counts for years before the ledger starts come from the same station rules.

Records on 08-21 in each year
Year	Records
1800	1
1802	1
1804	1
1807	1
1816	1
1818	1
1832	1
1834	1
1839	3
1843	1
1847	1
1849	3
1850	1
1851	2
1863	1
1866	1
1867	2
1870	3
1871	2
1872	1
1873	1
1876	1
1877	2
1879	2
1884	2
1885	5
1886	1
1887	5
1888	2
1889	3
1890	4
1891	2
1893	4
1894	8
1895	3
1896	2
1897	4
1898	4
1899	7
1900	4
1901	9
1902	8
1903	6
1904	8
1905	4
1906	22
1907	20
1908	13
1909	17
1910	33
1911	19
1912	50
1913	37
1914	24
1915	21
1916	106
1917	101
1918	202
1919	19
1920	59
1921	34
1922	58
1923	111
1924	135
1925	220
1926	227
1927	228
1928	110
1929	234
1930	297
1931	277
1932	264
1933	328
1934	320
1935	318
1936	807
1937	762
1938	239
1939	630
1940	683
1941	180
1942	415
1943	438
1944	346
1945	544
1946	390
1947	954
1948	305
1949	508
1950	958
1951	699
1952	368
1953	331
1954	497
1955	885
1956	701
1957	490
1958	389
1959	704
1960	490
1961	644
1962	469
1963	338
1964	794
1965	455
1966	661
1967	541
1968	1,014
1969	650
1970	373
1971	660
1972	441
1973	438
1974	564
1975	545
1976	756
1977	764
1978	445
1979	778
1980	904
1981	1,015
1982	769
1983	1,407
1984	975
1985	623
1986	1,166
1987	740
1988	889
1989	828
1990	910
1991	828
1992	957
1993	698
1994	968
1995	962
1996	950
1997	1,291
1998	948
1999	717
2000	861
2001	797
2002	965
2003	1,241
2004	1,585
2005	1,071
2006	797
2007	1,829
2008	1,012
2009	1,319
2010	1,155
2011	1,022
2012	990
2013	513
2014	624
2015	651
2016	890
2017	347
2018	816
2019	631
2020	1,147
2021	767
2022	917
2023	1,826
2024	777
2025	1,230
2026	1,289

Download the Data

Data for records on 1939-08-21: 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 10	441
10 to 20	39
20 to 30	21
30 to 40	12
40 to 50	7
50 to 60	7
60 to 70	1
70 to 80	1