Weather Records on 12 August 1939

282 weather records were set or tied worldwide on 12 August 1939. Highest significance: Yalta, UA.

Key Facts for 12 August 1939

On 12 August 1939, 282 weather records were set or tied at long-record stations worldwide.
82 were record highs and 51 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 2 monthly and 279 daily.
Yalta set a daily record precipitation of 76.9 mm (3.0 in) on 12 August 1939.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 448 records.

Record Map

282 stations

282 station records on 12 August 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 August 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Yalta	Ukraine	Record daily precipitation	76.9 mm (3.0 in)	56 of 100 (Notable)
Regensburg	Germany	Record daily precipitation	29.7 mm (1.2 in)	51 of 100 (Notable)
Simferopol	Ukraine	Record daily precipitation	31.6 mm (1.2 in)	49 of 100 (Notable)
Ai-Petri	Ukraine	Record daily precipitation	90.0 mm (3.5 in)	48 of 100 (Notable)
Kherson	Ukraine	Record daily precipitation	52.3 mm (2.1 in)	47 of 100 (Notable)
Boonville	United States	Record daily precipitation	90.7 mm (3.6 in)	45 of 100 (Notable)
Tufanganj	India	Record daily precipitation	238.8 mm (9.4 in)	44 of 100 (Notable)
Avon Park 2 W	United States	Record daily precipitation	85.1 mm (3.4 in)	43 of 100 (Notable)
Kalmar_D	Sweden	Record daily precipitation	39.6 mm (1.6 in)	42 of 100 (Notable)
Sivagiri	India	Record daily precipitation	25.4 mm (1.0 in)	40 of 100 (Notable)
Thiruvalla	India	Record daily precipitation	121.9 mm (4.8 in)	39 of 100 (Notable)
Punalur	India	Record daily precipitation	106.9 mm (4.2 in)	37 of 100 (Notable)
Salem	United States	Record daily precipitation	147.1 mm (5.8 in)	36 of 100 (Notable)
Chengannur	India	Record daily precipitation	117.6 mm (4.6 in)	35 of 100 (Notable)
Haripad	India	Record daily precipitation	116.6 mm (4.6 in)	35 of 100 (Notable)
Orillia	Canada	Record daily precipitation	41.4 mm (1.6 in)	34 of 100 (Routine)
Pattanamphitta	India	Record daily precipitation	108.7 mm (4.3 in)	34 of 100 (Routine)
Athani	India	Record daily precipitation	47.0 mm (1.9 in)	33 of 100 (Routine)
St Charles Elm Pt	United States	Record daily precipitation	64.8 mm (2.6 in)	33 of 100 (Routine)
Las Vegas 2 NW	United States	Record high minimum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Chanchal	India	Record daily precipitation	144.3 mm (5.7 in)	31 of 100 (Routine)
Parry Sound	Canada	Record daily precipitation	50.8 mm (2.0 in)	30 of 100 (Routine)
Fulton	United States	Record daily precipitation	46.7 mm (1.8 in)	30 of 100 (Routine)
Welland	Canada	Record daily precipitation	47.0 mm (1.9 in)	29 of 100 (Routine)
Bettiah	India	Record daily precipitation	156.2 mm (6.1 in)	29 of 100 (Routine)
Mavelikara	India	Record daily precipitation	86.6 mm (3.4 in)	29 of 100 (Routine)
Ottapalam	India	Record daily precipitation	114.3 mm (4.5 in)	29 of 100 (Routine)
Amalapuram	India	Record daily precipitation	54.9 mm (2.2 in)	28 of 100 (Routine)
Tiruvangadi	India	Record daily precipitation	70.6 mm (2.8 in)	28 of 100 (Routine)
Pembroke Eddy Match	Canada	Record daily precipitation	32.8 mm (1.3 in)	27 of 100 (Routine)
Koshkonong	United States	Record daily precipitation	50.5 mm (2.0 in)	27 of 100 (Routine)
Santhanpara	India	Record daily precipitation	51.3 mm (2.0 in)	26 of 100 (Routine)
Tampa	United States	Record daily precipitation	83.3 mm (3.3 in)	26 of 100 (Routine)
Ambur	India	Record daily precipitation	43.2 mm (1.7 in)	25 of 100 (Routine)
Highland Home	United States	Record high minimum temperature	25.6 C (78.1 F)	25 of 100 (Routine)
McPherson	United States	Record daily precipitation	61.7 mm (2.4 in)	25 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record low maximum temperature	7.8 C (46.0 F)	24 of 100 (Routine)
Dunvegan	Canada	Record high minimum temperature	13.3 C (55.9 F)	24 of 100 (Routine)
Aloograda	India	Record daily precipitation	68.8 mm (2.7 in)	24 of 100 (Routine)
Sahebganj	India	Record daily precipitation	90.2 mm (3.6 in)	24 of 100 (Routine)
Calarasi	Romania	Record low maximum temperature	18.7 C (65.7 F)	24 of 100 (Routine)
Kazan	Russia	Record low minimum temperature	4.1 C (39.4 F)	24 of 100 (Routine)
Cambridge City 3 N	United States	Record daily precipitation	55.6 mm (2.2 in)	24 of 100 (Routine)
Alma	United States	Record daily precipitation	44.7 mm (1.8 in)	24 of 100 (Routine)
Hathwa	India	Record daily precipitation	82.8 mm (3.3 in)	23 of 100 (Routine)
Ambalapuza	India	Record daily precipitation	108.0 mm (4.3 in)	23 of 100 (Routine)
Peermade Residen	India	Record daily precipitation	188.0 mm (7.4 in)	23 of 100 (Routine)
Raj-Nilgiri	India	Record daily precipitation	72.4 mm (2.9 in)	23 of 100 (Routine)
Narsingpur	India	Record daily precipitation	56.4 mm (2.2 in)	23 of 100 (Routine)
Astrakan	Russia	Record low minimum temperature	11.6 C (52.9 F)	23 of 100 (Routine)
Olands Norra Udde	Sweden	Record daily precipitation	49.6 mm (2.0 in)	23 of 100 (Routine)
Vardoe	Norway	Record high minimum temperature	14.1 C (57.4 F)	22 of 100 (Routine)
Karlshamn	Sweden	Record high minimum temperature	16.0 C (60.8 F)	22 of 100 (Routine)
Cle Elum	United States	Record high minimum temperature	16.1 C (61.0 F)	22 of 100 (Routine)
Te Kowai Exp STN	Australia	Record low maximum temperature	17.5 C (63.5 F)	21 of 100 (Routine)
Devikulam	India	Record daily precipitation	110.5 mm (4.4 in)	21 of 100 (Routine)
Tirumayam	India	Record daily precipitation	43.2 mm (1.7 in)	21 of 100 (Routine)
Tarpon Spgs Sewage Plt	United States	Record daily precipitation	86.4 mm (3.4 in)	21 of 100 (Routine)
Warrenton 1 N	United States	Record daily precipitation	32.3 mm (1.3 in)	21 of 100 (Routine)
Prince Albert Road (Sar)	South Africa	Record daily precipitation	4.8 mm (0.19 in)	20 of 100 (Routine)

Counts by Type and Timescale

282 records

Records set or tied on 12 August 1939 by type: Highest daily maximum 42, Lowest daily maximum 17, Highest daily minimum 40, Lowest daily minimum 34, Heaviest daily rainfall 149.

Records on 12 August 1939 by type
Record type	Records
Highest daily maximum	42
Lowest daily maximum	17
Highest daily minimum	40
Lowest daily minimum	34
Heaviest daily rainfall	149
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 August 1939 by timescale: all-time 1, monthly 2, daily 279.

How Much Records Were Beaten By

240 broken records

Margins by which the 240 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 125.5. Ties are not counted.

Top 20 by Significance

12 August 1939

Top 20 records on 12 August 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 August 1939	Yalta, UA	daily rain	76.9 mm (3.0 in)	64.5 mm (2.5 in)	39 years	56 of 100 (Notable)
12 August 1939	Regensburg, DE	daily rain	29.7 mm (1.2 in)	18.0 mm (0.7 in)	58 years	51 of 100 (Notable)
12 August 1939	Simferopol, UA	daily rain	31.6 mm (1.2 in)	26.4 mm (1.0 in)	32 years	49 of 100 (Notable)
12 August 1939	Ai-Petri, UA	daily rain	90.0 mm (3.5 in)	81.8 mm (3.2 in)	13 years	48 of 100 (Notable)
12 August 1939	Kherson, UA	daily rain	52.3 mm (2.1 in)	30.4 mm (1.2 in)	30 years	47 of 100 (Notable)
12 August 1939	Boonville, US	daily rain	90.7 mm (3.6 in)	68.3 mm (2.7 in)	4 years	45 of 100 (Notable)
12 August 1939	Tufanganj, IN	daily rain	238.8 mm (9.4 in)	125.5 mm (4.9 in)	10 years	44 of 100 (Notable)
12 August 1939	Avon Park 2 W, US	daily rain	85.1 mm (3.4 in)	54.6 mm (2.1 in)	20 years	43 of 100 (Notable)
12 August 1939	Kalmar_D, SE	daily rain	39.6 mm (1.6 in)	13.8 mm (0.5 in)	36 years	42 of 100 (Notable)
12 August 1939	Sivagiri, IN	daily rain	25.4 mm (1.0 in)	25.4 mm (1.0 in)	33 years	40 of 100 (Notable)
12 August 1939	Thiruvalla, IN	daily rain	121.9 mm (4.8 in)	63.0 mm (2.5 in)	16 years	39 of 100 (Notable)
12 August 1939	Punalur, IN	daily rain	106.9 mm (4.2 in)	50.0 mm (2.0 in)	16 years	37 of 100 (Notable)
12 August 1939	Salem, US	all-time rain	147.1 mm (5.8 in)	9.9 mm (0.39 in)	24 years	36 of 100 (Notable)
12 August 1939	Chengannur, IN	daily rain	117.6 mm (4.6 in)	56.6 mm (2.2 in)	16 years	35 of 100 (Notable)
12 August 1939	Haripad, IN	daily rain	116.6 mm (4.6 in)	56.4 mm (2.2 in)	16 years	35 of 100 (Notable)
12 August 1939	Orillia, CA	daily rain	41.4 mm (1.6 in)	20.6 mm (0.8 in)	24 years	34 of 100 (Routine)
12 August 1939	Pattanamphitta, IN	daily rain	108.7 mm (4.3 in)	50.3 mm (2.0 in)	16 years	34 of 100 (Routine)
12 August 1939	Athani, IN	daily rain	47.0 mm (1.9 in)	41.9 mm (1.6 in)	12 years	33 of 100 (Routine)
12 August 1939	St Charles Elm Pt, US	daily rain	64.8 mm (2.6 in)	31.5 mm (1.2 in)	42 years	33 of 100 (Routine)
12 August 1939	Las Vegas 2 NW, US	daily high min	20.6 C (69.1 F)	5.0 C (9.0 F)	20 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 1939

Records set or tied on this calendar date in each year from 1793 to 1939. 1939 had 282 records.

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

Records on 08-12 in each year
Year	Records
1793	1
1796	1
1811	2
1814	1
1815	1
1825	1
1843	1
1851	1
1854	1
1855	2
1856	1
1861	1
1864	3
1865	1
1867	1
1868	1
1871	2
1872	1
1873	1
1874	2
1875	3
1876	2
1879	1
1881	2
1883	1
1884	1
1885	1
1887	2
1888	2
1889	4
1890	4
1891	4
1892	2
1893	1
1894	1
1895	6
1896	2
1897	4
1898	1
1899	10
1900	1
1901	5
1902	9
1903	14
1904	13
1905	16
1906	8
1907	8
1908	31
1909	42
1910	16
1911	33
1912	40
1913	39
1914	26
1915	46
1916	31
1917	134
1918	37
1919	42
1920	26
1921	174
1922	71
1923	89
1924	267
1925	150
1926	154
1927	145
1928	173
1929	276
1930	501
1931	708
1932	418
1933	271
1934	471
1935	408
1936	591
1937	356
1938	237
1939	282
1940	545
1941	481
1942	257
1943	523
1944	595
1945	295
1946	655
1947	729
1948	384
1949	469
1950	442
1951	357
1952	533
1953	227
1954	969
1955	590
1956	265
1957	384
1958	406
1959	388
1960	707
1961	381
1962	466
1963	559
1964	1,346
1965	977
1966	777
1967	1,135
1968	444
1969	629
1970	422
1971	486
1972	473
1973	442
1974	560
1975	593
1976	495
1977	747
1978	571
1979	1,192
1980	692
1981	665
1982	789
1983	923
1984	665
1985	935
1986	615
1987	935
1988	1,518
1989	827
1990	727
1991	726
1992	1,134
1993	936
1994	861
1995	1,654
1996	1,336
1997	1,363
1998	1,215
1999	1,325
2000	741
2001	855
2002	1,345
2003	1,752
2004	1,872
2005	1,085
2006	874
2007	1,209
2008	970
2009	814
2010	1,907
2011	903
2012	910
2013	427
2014	787
2015	757
2016	1,290
2017	533
2018	571
2019	695
2020	730
2021	980
2022	616
2023	779
2024	659
2025	639
2026	849

Download the Data

Data for records on 1939-08-12: 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 20	197
20 to 40	27
40 to 60	9
60 to 80	5
80 to 100	1
100 to 120	0
120 to 140	1