Weather Records on 12 August 1940

545 weather records were set or tied worldwide on 12 August 1940. Highest significance: Yemassee 1 N, US.

Key Facts for 12 August 1940

On 12 August 1940, 545 weather records were set or tied at long-record stations worldwide.
321 were record highs and 62 were record lows, counting maximum and minimum temperature.
By timescale, 13 were all-time records, 34 monthly and 498 daily.
Yemassee 1 N set an all-time record daily precipitation of 228.6 mm (9.0 in) on 12 August 1940.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 447 records.

Record Map

545 stations

545 station records on 12 August 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 August 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Yemassee 1 N	United States	Record daily precipitation	228.6 mm (9.0 in)	71 of 100 (Major)
Summerville 4W	United States	Record daily precipitation	259.8 mm (10.2 in)	67 of 100 (Major)
Sholapur	India	Record daily precipitation	191.0 mm (7.5 in)	59 of 100 (Notable)
Mtn View 91	United States	Record daily precipitation	181.1 mm (7.1 in)	51 of 100 (Notable)
Olaa 92	United States	Record daily precipitation	157.5 mm (6.2 in)	51 of 100 (Notable)
Millen 4 N	United States	Record daily precipitation	101.6 mm (4.0 in)	50 of 100 (Notable)
Anderson	United States	Record daily precipitation	132.8 mm (5.2 in)	50 of 100 (Notable)
Blackville 3 W	United States	Record daily precipitation	91.4 mm (3.6 in)	50 of 100 (Notable)
Haina 214	United States	Record daily precipitation	126.5 mm (5.0 in)	49 of 100 (Notable)
Kilauea 1134	United States	Record daily precipitation	61.7 mm (2.4 in)	49 of 100 (Notable)
Lihue 1020	United States	Record daily precipitation	69.6 mm (2.7 in)	48 of 100 (Notable)
Harrison 1 NNW	United States	Record daily precipitation	67.8 mm (2.7 in)	43 of 100 (Notable)
Gorin	United States	Record daily precipitation	86.6 mm (3.4 in)	43 of 100 (Notable)
Mangalore	India	Record daily precipitation	165.9 mm (6.5 in)	42 of 100 (Notable)
Chandur Bazar	India	Record daily precipitation	68.8 mm (2.7 in)	40 of 100 (Notable)
Akalkot	India	Record daily precipitation	57.2 mm (2.3 in)	39 of 100 (Notable)
Jhabua	India	Record daily precipitation	59.7 mm (2.4 in)	37 of 100 (Notable)
Katol	India	Record daily precipitation	66.5 mm (2.6 in)	36 of 100 (Notable)
Eutawville	United States	Record daily precipitation	81.3 mm (3.2 in)	36 of 100 (Notable)
Covington	United States	Record daily precipitation	101.6 mm (4.0 in)	35 of 100 (Notable)
Big Rapids Wtp	United States	Record daily precipitation	78.7 mm (3.1 in)	35 of 100 (Notable)
Paauhau 217	United States	Record daily precipitation	115.6 mm (4.6 in)	35 of 100 (Notable)
Bolaram	India	Record daily precipitation	69.1 mm (2.7 in)	34 of 100 (Routine)
Devgad	India	Record daily precipitation	106.2 mm (4.2 in)	34 of 100 (Routine)
Hinganghat	India	Record daily precipitation	121.2 mm (4.8 in)	34 of 100 (Routine)
Cascade 5 S	United States	Record high maximum temperature	42.8 C (109.0 F)	34 of 100 (Routine)
Pahala 21	United States	Record daily precipitation	90.2 mm (3.6 in)	34 of 100 (Routine)
Bantwal	India	Record daily precipitation	133.6 mm (5.3 in)	33 of 100 (Routine)
Waynesville 1 E	United States	Record daily precipitation	43.2 mm (1.7 in)	33 of 100 (Routine)
Mildura Post Office	Australia	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
Alamogordo 1	United States	Record low maximum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Pecs Pogany	Hungary	Record daily precipitation	57.7 mm (2.3 in)	30 of 100 (Routine)
Atner	India	Record daily precipitation	52.6 mm (2.1 in)	30 of 100 (Routine)
Rock House	United States	Record daily precipitation	102.4 mm (4.0 in)	30 of 100 (Routine)
Dillon U of Montana Western	United States	Record high maximum temperature	37.8 C (100.0 F)	29 of 100 (Routine)
San Jacinto	United States	Record high maximum temperature	42.2 C (108.0 F)	29 of 100 (Routine)
Chappells 2 NNW	United States	Record daily precipitation	119.9 mm (4.7 in)	29 of 100 (Routine)
Moose Jaw Chab	Canada	Record high maximum temperature	40.0 C (104.0 F)	28 of 100 (Routine)
Digras	India	Record daily precipitation	57.7 mm (2.3 in)	28 of 100 (Routine)
Fremont	United States	Record high minimum temperature	26.7 C (80.1 F)	28 of 100 (Routine)
Dialville 2 W	United States	Record daily precipitation	38.4 mm (1.5 in)	28 of 100 (Routine)
Hilo 86A	United States	Record daily precipitation	156.5 mm (6.2 in)	28 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record high minimum temperature	12.1 C (53.8 F)	27 of 100 (Routine)
Jaora	India	Record daily precipitation	46.0 mm (1.8 in)	27 of 100 (Routine)
Barud(Warud)	India	Record daily precipitation	66.0 mm (2.6 in)	27 of 100 (Routine)
Nagpur (Mayo Hospit	India	Record daily precipitation	69.9 mm (2.8 in)	27 of 100 (Routine)
Augusta	United States	Record high maximum temperature	39.4 C (102.9 F)	26 of 100 (Routine)
East Anaconda	United States	Record high maximum temperature	37.8 C (100.0 F)	26 of 100 (Routine)
Norris Madison Pwr House	United States	Record high maximum temperature	38.9 C (102.0 F)	26 of 100 (Routine)
Puttur	India	Record daily precipitation	137.2 mm (5.4 in)	25 of 100 (Routine)
Chittur	India	Record daily precipitation	68.3 mm (2.7 in)	25 of 100 (Routine)
Purushottampur	India	Record daily precipitation	40.6 mm (1.6 in)	25 of 100 (Routine)
Petropavlovskij Majak	Russia	Record high minimum temperature	15.3 C (59.5 F)	25 of 100 (Routine)
Petropavlovsk-Kamchatskij	Russia	Record high minimum temperature	15.3 C (59.5 F)	25 of 100 (Routine)
Dublin	United States	Record daily precipitation	102.9 mm (4.1 in)	25 of 100 (Routine)
Greenville Dwtn AP	United States	Record daily precipitation	51.8 mm (2.0 in)	25 of 100 (Routine)
Humboldt	Canada	Record high maximum temperature	33.3 C (91.9 F)	24 of 100 (Routine)
Chimur	India	Record daily precipitation	110.5 mm (4.4 in)	24 of 100 (Routine)
Grover 2 S	United States	Record high maximum temperature	35.0 C (95.0 F)	24 of 100 (Routine)
El Paso	United States	Record low maximum temperature	25.6 C (78.1 F)	24 of 100 (Routine)

Counts by Type and Timescale

545 records

Records set or tied on 12 August 1940 by type: Highest daily maximum 184, Lowest daily maximum 51, Highest daily minimum 137, Lowest daily minimum 11, Heaviest daily rainfall 162.

Records on 12 August 1940 by type
Record type	Records
Highest daily maximum	184
Lowest daily maximum	51
Highest daily minimum	137
Lowest daily minimum	11
Heaviest daily rainfall	162
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 August 1940 by timescale: all-time 13, monthly 34, daily 498.

How Much Records Were Beaten By

433 broken records

Margins by which the 433 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 116.6. Ties are not counted.

Top 20 by Significance

12 August 1940

Top 20 records on 12 August 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 August 1940	Yemassee 1 N, US	all-time rain	228.6 mm (9.0 in)	88.1 mm (3.5 in)	24 years	71 of 100 (Major)
12 August 1940	Summerville 4W, US	all-time rain	259.8 mm (10.2 in)	74.4 mm (2.9 in)	11 years	67 of 100 (Major)
12 August 1940	Sholapur, IN	all-time rain	191.0 mm (7.5 in)	30.7 mm (1.2 in)	33 years	59 of 100 (Notable)
12 August 1940	Mtn View 91, US	daily rain	181.1 mm (7.1 in)	116.6 mm (4.6 in)	27 years	51 of 100 (Notable)
12 August 1940	Olaa 92, US	daily rain	157.5 mm (6.2 in)	113.0 mm (4.4 in)	27 years	51 of 100 (Notable)
12 August 1940	Millen 4 N, US	daily rain	101.6 mm (4.0 in)	62.0 mm (2.4 in)	20 years	50 of 100 (Notable)
12 August 1940	Anderson, US	daily rain	132.8 mm (5.2 in)	92.9 mm (3.7 in)	21 years	50 of 100 (Notable)
12 August 1940	Blackville 3 W, US	daily rain	91.4 mm (3.6 in)	63.5 mm (2.5 in)	20 years	50 of 100 (Notable)
12 August 1940	Haina 214, US	daily rain	126.5 mm (5.0 in)	89.2 mm (3.5 in)	20 years	49 of 100 (Notable)
12 August 1940	Kilauea 1134, US	daily rain	61.7 mm (2.4 in)	49.0 mm (1.9 in)	23 years	49 of 100 (Notable)
12 August 1940	Lihue 1020, US	daily rain	69.6 mm (2.7 in)	60.7 mm (2.4 in)	19 years	48 of 100 (Notable)
12 August 1940	Harrison 1 NNW, US	daily rain	67.8 mm (2.7 in)	39.4 mm (1.6 in)	32 years	43 of 100 (Notable)
12 August 1940	Gorin, US	daily rain	86.6 mm (3.4 in)	49.8 mm (2.0 in)	15 years	43 of 100 (Notable)
12 August 1940	Mangalore, IN	daily rain	165.9 mm (6.5 in)	86.7 mm (3.4 in)	16 years	42 of 100 (Notable)
12 August 1940	Chandur Bazar, IN	daily rain	68.8 mm (2.7 in)	57.4 mm (2.3 in)	6 years	40 of 100 (Notable)
12 August 1940	Akalkot, IN	daily rain	57.2 mm (2.3 in)	36.6 mm (1.4 in)	33 years	39 of 100 (Notable)
12 August 1940	Jhabua, IN	daily rain	59.7 mm (2.4 in)	47.0 mm (1.9 in)	30 years	37 of 100 (Notable)
12 August 1940	Katol, IN	daily rain	66.5 mm (2.6 in)	43.1 mm (1.7 in)	33 years	36 of 100 (Notable)
12 August 1940	Eutawville, US	daily rain	81.3 mm (3.2 in)	36.1 mm (1.4 in)	41 years	36 of 100 (Notable)
12 August 1940	Covington, US	monthly rain	101.6 mm (4.0 in)	13.5 mm (0.5 in)	44 years	35 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

1793 to 1940

Records set or tied on this calendar date in each year from 1793 to 1940. 1940 had 545 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 1940-08-12: 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	380
20 to 40	28
40 to 60	13
60 to 80	6
80 to 100	4
100 to 120	2