Weather Records on 20 August 1939

448 weather records were set or tied worldwide on 20 August 1939. Highest significance: Moorestown 4 E, US.

Key Facts for 20 August 1939

On 20 August 1939, 448 weather records were set or tied at long-record stations worldwide.
86 were record highs and 80 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 13 monthly and 433 daily.
Moorestown 4 E set a daily record precipitation of 98.8 mm (3.9 in) on 20 August 1939.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 455 records.

Record Map

448 stations

448 station records on 20 August 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Moorestown 4 E	United States	Record daily precipitation	98.8 mm (3.9 in)	62 of 100 (Major)
Vineland	United States	Record daily precipitation	130.0 mm (5.1 in)	60 of 100 (Major)
Mangrulpir	India	Record daily precipitation	90.4 mm (3.6 in)	54 of 100 (Notable)
Akot	India	Record daily precipitation	87.6 mm (3.4 in)	54 of 100 (Notable)
Wilmington City Hall	United States	Record daily precipitation	99.3 mm (3.9 in)	54 of 100 (Notable)
Pleasantville 1 N	United States	Record daily precipitation	253.2 mm (10.0 in)	54 of 100 (Notable)
Karanjia	India	Record daily precipitation	112.8 mm (4.4 in)	53 of 100 (Notable)
Warora	India	Record daily precipitation	152.4 mm (6.0 in)	53 of 100 (Notable)
Ghorajheri	India	Record daily precipitation	199.4 mm (7.9 in)	51 of 100 (Notable)
Chimur	India	Record daily precipitation	181.9 mm (7.2 in)	50 of 100 (Notable)
Belgaum	India	Record daily precipitation	112.0 mm (4.4 in)	48 of 100 (Notable)
Malkapur	India	Record daily precipitation	69.1 mm (2.7 in)	48 of 100 (Notable)
Umrer	India	Record daily precipitation	128.3 mm (5.1 in)	48 of 100 (Notable)
Digras	India	Record daily precipitation	110.0 mm (4.3 in)	48 of 100 (Notable)
Colchester 2 W	United States	Record daily precipitation	81.8 mm (3.2 in)	48 of 100 (Notable)
Burhanpur Sr	India	Record daily precipitation	85.1 mm (3.4 in)	47 of 100 (Notable)
Seoni	India	Record daily precipitation	165.9 mm (6.5 in)	46 of 100 (Notable)
Nandura	India	Record daily precipitation	79.8 mm (3.1 in)	45 of 100 (Notable)
Grand Rapids Sutron	United States	Record daily precipitation	105.2 mm (4.1 in)	45 of 100 (Notable)
Tuckerton 2 NE	United States	Record daily precipitation	112.3 mm (4.4 in)	45 of 100 (Notable)
Vasteras-Hasslo	Sweden	Record daily precipitation	41.0 mm (1.6 in)	44 of 100 (Notable)
Nelson	Australia	Record daily precipitation	38.4 mm (1.5 in)	43 of 100 (Notable)
Makrai	India	Record daily precipitation	147.8 mm (5.8 in)	43 of 100 (Notable)
Asola	India	Record daily precipitation	149.9 mm (5.9 in)	43 of 100 (Notable)
Khairee	India	Record daily precipitation	172.7 mm (6.8 in)	43 of 100 (Notable)
Nullawarre	Australia	Record daily precipitation	33.8 mm (1.3 in)	42 of 100 (Notable)
Port Fairy Post Office	Australia	Record daily precipitation	34.5 mm (1.4 in)	42 of 100 (Notable)
Darwha	India	Record daily precipitation	118.6 mm (4.7 in)	42 of 100 (Notable)
Armori	India	Record daily precipitation	154.4 mm (6.1 in)	41 of 100 (Notable)
Port Arthur	Australia	Record daily precipitation	29.0 mm (1.1 in)	40 of 100 (Notable)
Badnera	India	Record daily precipitation	91.4 mm (3.6 in)	40 of 100 (Notable)
Daryapur	India	Record daily precipitation	84.6 mm (3.3 in)	40 of 100 (Notable)
Chandgad	India	Record daily precipitation	180.6 mm (7.1 in)	40 of 100 (Notable)
Macarthur (Glenhuntly)	Australia	Record daily precipitation	29.7 mm (1.2 in)	39 of 100 (Notable)
Amraoti	India	Record daily precipitation	88.1 mm (3.5 in)	39 of 100 (Notable)
Dharni	India	Record daily precipitation	122.4 mm (4.8 in)	39 of 100 (Notable)
Khamgaon	India	Record daily precipitation	68.6 mm (2.7 in)	39 of 100 (Notable)
Balapur	India	Record daily precipitation	88.6 mm (3.5 in)	38 of 100 (Notable)
Patur	India	Record daily precipitation	71.4 mm (2.8 in)	38 of 100 (Notable)
Murtajapur	India	Record daily precipitation	83.8 mm (3.3 in)	37 of 100 (Notable)
Raver	India	Record daily precipitation	59.4 mm (2.3 in)	37 of 100 (Notable)
Portland	Australia	Record daily precipitation	35.8 mm (1.4 in)	36 of 100 (Notable)
Chandrapur	India	Record daily precipitation	124.2 mm (4.9 in)	36 of 100 (Notable)
Feodosiia	Ukraine	Record daily precipitation	51.3 mm (2.0 in)	36 of 100 (Notable)
Port Fairy (Griffiths Island)	Australia	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Isabela Substn	Puerto Rico [United States]	Record daily precipitation	53.8 mm (2.1 in)	35 of 100 (Notable)
Canon City	United States	Record low maximum temperature	14.4 C (57.9 F)	35 of 100 (Notable)
Brahmapuri	India	Record daily precipitation	148.6 mm (5.9 in)	34 of 100 (Routine)
Yeotmal	India	Record daily precipitation	146.8 mm (5.8 in)	34 of 100 (Routine)
Ai-Petri	Ukraine	Record daily precipitation	32.7 mm (1.3 in)	34 of 100 (Routine)
Cooeearup	Australia	Record daily precipitation	36.8 mm (1.4 in)	33 of 100 (Routine)
Chindwara	India	Record daily precipitation	99.6 mm (3.9 in)	33 of 100 (Routine)
Nagpur (Mayo Hospit	India	Record daily precipitation	79.0 mm (3.1 in)	33 of 100 (Routine)
Oskaloosa	United States	Record daily precipitation	52.1 mm (2.1 in)	33 of 100 (Routine)
Premaydena Hatchery	Australia	Record daily precipitation	25.1 mm (1.0 in)	32 of 100 (Routine)
Seoni	India	Record daily precipitation	109.7 mm (4.3 in)	32 of 100 (Routine)
Hampton	United States	Record daily precipitation	33.5 mm (1.3 in)	32 of 100 (Routine)
Osage	United States	Record daily precipitation	73.7 mm (2.9 in)	32 of 100 (Routine)
Perth Regional Office	Australia	Record daily precipitation	43.2 mm (1.7 in)	31 of 100 (Routine)
Kalamunda	Australia	Record daily precipitation	39.6 mm (1.6 in)	30 of 100 (Routine)

Counts by Type and Timescale

448 records

Records set or tied on 20 August 1939 by type: Highest daily maximum 31, Lowest daily maximum 44, Highest daily minimum 55, Lowest daily minimum 36, Heaviest daily rainfall 282.

Records on 20 August 1939 by type
Record type	Records
Highest daily maximum	31
Lowest daily maximum	44
Highest daily minimum	55
Lowest daily minimum	36
Heaviest daily rainfall	282
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 1939 by timescale: all-time 2, monthly 13, daily 433.

How Much Records Were Beaten By

388 broken records

Margins by which the 388 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 174.0. Ties are not counted.

Top 20 by Significance

20 August 1939

Top 20 records on 20 August 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 1939	Moorestown 4 E, US	daily rain	98.8 mm (3.9 in)	74.7 mm (2.9 in)	51 years	62 of 100 (Major)
20 August 1939	Vineland, US	monthly rain	130.0 mm (5.1 in)	37.3 mm (1.5 in)	69 years	60 of 100 (Major)
20 August 1939	Mangrulpir, IN	daily rain	90.4 mm (3.6 in)	60.7 mm (2.4 in)	36 years	54 of 100 (Notable)
20 August 1939	Akot, IN	daily rain	87.6 mm (3.4 in)	67.0 mm (2.6 in)	36 years	54 of 100 (Notable)
20 August 1939	Wilmington City Hall, US	daily rain	99.3 mm (3.9 in)	78.7 mm (3.1 in)	34 years	54 of 100 (Notable)
20 August 1939	Pleasantville 1 N, US	all-time rain	253.2 mm (10.0 in)	52.0 mm (2.0 in)	3 years	54 of 100 (Notable)
20 August 1939	Karanjia, IN	daily rain	112.8 mm (4.4 in)	68.3 mm (2.7 in)	36 years	53 of 100 (Notable)
20 August 1939	Warora, IN	daily rain	152.4 mm (6.0 in)	96.5 mm (3.8 in)	36 years	53 of 100 (Notable)
20 August 1939	Ghorajheri, IN	daily rain	199.4 mm (7.9 in)	174.0 mm (6.9 in)	29 years	51 of 100 (Notable)
20 August 1939	Chimur, IN	daily rain	181.9 mm (7.2 in)	134.9 mm (5.3 in)	25 years	50 of 100 (Notable)
20 August 1939	Belgaum, IN	daily rain	112.0 mm (4.4 in)	77.2 mm (3.0 in)	17 years	48 of 100 (Notable)
20 August 1939	Malkapur, IN	daily rain	69.1 mm (2.7 in)	39.6 mm (1.6 in)	36 years	48 of 100 (Notable)
20 August 1939	Umrer, IN	daily rain	128.3 mm (5.1 in)	86.6 mm (3.4 in)	36 years	48 of 100 (Notable)
20 August 1939	Digras, IN	daily rain	110.0 mm (4.3 in)	55.9 mm (2.2 in)	36 years	48 of 100 (Notable)
20 August 1939	Colchester 2 W, US	daily rain	81.8 mm (3.2 in)	69.9 mm (2.8 in)	14 years	48 of 100 (Notable)
20 August 1939	Burhanpur Sr, IN	daily rain	85.1 mm (3.4 in)	52.8 mm (2.1 in)	16 years	47 of 100 (Notable)
20 August 1939	Seoni, IN	daily rain	165.9 mm (6.5 in)	95.3 mm (3.8 in)	10 years	46 of 100 (Notable)
20 August 1939	Nandura, IN	daily rain	79.8 mm (3.1 in)	48.8 mm (1.9 in)	36 years	45 of 100 (Notable)
20 August 1939	Grand Rapids Sutron, US	all-time rain	105.2 mm (4.1 in)	14.8 mm (0.6 in)	34 years	45 of 100 (Notable)
20 August 1939	Tuckerton 2 NE, US	daily rain	112.3 mm (4.4 in)	105.4 mm (4.1 in)	5 years	45 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

1797 to 1939

Records set or tied on this calendar date in each year from 1797 to 1939. 1939 had 448 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 1939-08-20: 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 2026-10-17 (17 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 25	327
25 to 50	34
50 to 75	13
75 to 100	7
100 to 125	4
125 to 150	2
150 to 175	1