Weather Records on 9 August 1940

455 weather records were set or tied worldwide on 9 August 1940. Highest significance: Grand Coteau, US.

Key Facts for 9 August 1940

On 9 August 1940, 455 weather records were set or tied at long-record stations worldwide.
169 were record highs and 131 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 27 monthly and 424 daily.
Grand Coteau set an all-time record daily precipitation of 408.2 mm (16.1 in) on 9 August 1940.
Across 156 earlier years (1798 to 2026) the same calendar date averaged 474 records.

Record Map

455 stations

455 station records on 9 August 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 August 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Grand Coteau	United States	Record daily precipitation	408.2 mm (16.1 in)	67 of 100 (Major)
Abbeville	United States	Record daily precipitation	444.5 mm (17.5 in)	65 of 100 (Major)
Kasganj	India	Record daily precipitation	215.4 mm (8.5 in)	61 of 100 (Major)
Simmesport	United States	Record daily precipitation	152.4 mm (6.0 in)	61 of 100 (Major)
Melville	United States	Record daily precipitation	238.8 mm (9.4 in)	58 of 100 (Notable)
Lake Arthur 7 SW	United States	Record daily precipitation	294.6 mm (11.6 in)	54 of 100 (Notable)
Giddalore	India	Record daily precipitation	58.7 mm (2.3 in)	48 of 100 (Notable)
Oskaloosa	United States	Record daily precipitation	58.7 mm (2.3 in)	48 of 100 (Notable)
Sahaswan	India	Record daily precipitation	183.6 mm (7.2 in)	47 of 100 (Notable)
Gopalpur	India	Record daily precipitation	205.7 mm (8.1 in)	46 of 100 (Notable)
Ramdurg	India	Record daily precipitation	71.1 mm (2.8 in)	45 of 100 (Notable)
Aliganj	India	Record daily precipitation	193.3 mm (7.6 in)	45 of 100 (Notable)
Etah	India	Record daily precipitation	156.2 mm (6.1 in)	45 of 100 (Notable)
Bhagaon Bhogaon	India	Record daily precipitation	118.9 mm (4.7 in)	45 of 100 (Notable)
Jefferson City Wtp	United States	Record daily precipitation	76.2 mm (3.0 in)	45 of 100 (Notable)
Gudiyatham	India	Record daily precipitation	78.2 mm (3.1 in)	43 of 100 (Notable)
Kavali	India	Record daily precipitation	43.2 mm (1.7 in)	41 of 100 (Notable)
Rivers Inlet	Canada	Record daily precipitation	64.8 mm (2.6 in)	40 of 100 (Notable)
Kaimganj	India	Record daily precipitation	147.3 mm (5.8 in)	40 of 100 (Notable)
Hasanganj	India	Record daily precipitation	119.9 mm (4.7 in)	40 of 100 (Notable)
Santaravur	India	Record daily precipitation	72.4 mm (2.9 in)	39 of 100 (Notable)
Safipur	India	Record daily precipitation	104.4 mm (4.1 in)	39 of 100 (Notable)
Jeanerette 5 NW	United States	Record daily precipitation	69.1 mm (2.7 in)	38 of 100 (Notable)
Proddatur	India	Record daily precipitation	51.3 mm (2.0 in)	37 of 100 (Notable)
Robeline	United States	Record daily precipitation	116.1 mm (4.6 in)	34 of 100 (Routine)
Mainpuri	India	Record daily precipitation	109.7 mm (4.3 in)	33 of 100 (Routine)
Jennings	United States	Record daily precipitation	121.4 mm (4.8 in)	33 of 100 (Routine)
Plain Dealing	United States	Record low maximum temperature	23.3 C (73.9 F)	33 of 100 (Routine)
Auburn 5 ESE	United States	Record daily precipitation	47.0 mm (1.9 in)	33 of 100 (Routine)
Dialville 2 W	United States	Record low maximum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Grenfell	Canada	Record high minimum temperature	21.7 C (71.1 F)	31 of 100 (Routine)
Koilkuntla	India	Record daily precipitation	77.5 mm (3.1 in)	31 of 100 (Routine)
Mainpuri	India	Record daily precipitation	146.6 mm (5.8 in)	31 of 100 (Routine)
Batesville	United States	Record low maximum temperature	25.0 C (77.0 F)	31 of 100 (Routine)
Cuero	United States	Record high minimum temperature	29.4 C (84.9 F)	31 of 100 (Routine)
Nacogdoches	United States	Record low maximum temperature	23.3 C (73.9 F)	31 of 100 (Routine)
Owk	India	Record daily precipitation	47.2 mm (1.9 in)	30 of 100 (Routine)
Guthrie Ctr	United States	Record daily precipitation	29.7 mm (1.2 in)	30 of 100 (Routine)
Webster City	United States	Record daily precipitation	30.7 mm (1.2 in)	30 of 100 (Routine)
Krishnapatnam	India	Record daily precipitation	48.8 mm (1.9 in)	29 of 100 (Routine)
Grand Cane Fire Twr	United States	Record daily precipitation	54.6 mm (2.1 in)	29 of 100 (Routine)
Stillwater 2 W	United States	Record daily precipitation	40.1 mm (1.6 in)	29 of 100 (Routine)
Jammalamadugu	India	Record daily precipitation	39.4 mm (1.6 in)	28 of 100 (Routine)
Baseri	India	Record daily precipitation	94.0 mm (3.7 in)	28 of 100 (Routine)
Sikandra Rao	India	Record daily precipitation	88.1 mm (3.5 in)	27 of 100 (Routine)
Little Rock St Capitol	United States	Record low maximum temperature	24.4 C (75.9 F)	27 of 100 (Routine)
Mexia	United States	Record low maximum temperature	27.2 C (81.0 F)	27 of 100 (Routine)
Gannavaram	India	Record daily precipitation	50.8 mm (2.0 in)	26 of 100 (Routine)
Mustafabad Jasra	India	Record daily precipitation	118.6 mm (4.7 in)	26 of 100 (Routine)
Grand Cane Fire Twr	United States	Record low maximum temperature	21.1 C (70.0 F)	26 of 100 (Routine)
Kaufman 3 SE	United States	Record low maximum temperature	25.6 C (78.1 F)	26 of 100 (Routine)
Paris	United States	Record low maximum temperature	24.4 C (75.9 F)	26 of 100 (Routine)
Texarkana Webb Fld	United States	Record low maximum temperature	22.2 C (72.0 F)	26 of 100 (Routine)
Indian Head Cda	Canada	Record high minimum temperature	20.0 C (68.0 F)	25 of 100 (Routine)
Rapur	India	Record daily precipitation	63.5 mm (2.5 in)	25 of 100 (Routine)
Atmakur	India	Record daily precipitation	38.1 mm (1.5 in)	25 of 100 (Routine)
Raichur	India	Record daily precipitation	68.8 mm (2.7 in)	25 of 100 (Routine)
Pocahontas 1	United States	Record low maximum temperature	25.0 C (77.0 F)	25 of 100 (Routine)
Indianola 1SW	United States	Record daily precipitation	47.8 mm (1.9 in)	25 of 100 (Routine)
Grand Coteau	United States	Record low maximum temperature	23.9 C (75.0 F)	25 of 100 (Routine)

Counts by Type and Timescale

455 records

Records set or tied on 9 August 1940 by type: Highest daily maximum 113, Lowest daily maximum 105, Highest daily minimum 56, Lowest daily minimum 26, Heaviest daily rainfall 155.

Records on 9 August 1940 by type
Record type	Records
Highest daily maximum	113
Lowest daily maximum	105
Highest daily minimum	56
Lowest daily minimum	26
Heaviest daily rainfall	155
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 9 August 1940 by timescale: all-time 4, monthly 27, daily 424.

How Much Records Were Beaten By

349 broken records

Margins by which the 349 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 221.0. Ties are not counted.

Top 20 by Significance

9 August 1940

Top 20 records on 9 August 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 August 1940	Grand Coteau, US	all-time rain	408.2 mm (16.1 in)	103.4 mm (4.1 in)	13 years	67 of 100 (Major)
9 August 1940	Abbeville, US	all-time rain	444.5 mm (17.5 in)	221.0 mm (8.7 in)	0 years	65 of 100 (Major)
9 August 1940	Kasganj, IN	all-time rain	215.4 mm (8.5 in)	57.7 mm (2.3 in)	28 years	61 of 100 (Major)
9 August 1940	Simmesport, US	monthly rain	152.4 mm (6.0 in)	59.4 mm (2.3 in)	28 years	61 of 100 (Major)
9 August 1940	Melville, US	monthly rain	238.8 mm (9.4 in)	132.1 mm (5.2 in)	13 years	58 of 100 (Notable)
9 August 1940	Lake Arthur 7 SW, US	daily rain	294.6 mm (11.6 in)	217.9 mm (8.6 in)	36 years	54 of 100 (Notable)
9 August 1940	Giddalore, IN	daily rain	58.7 mm (2.3 in)	43.0 mm (1.7 in)	39 years	48 of 100 (Notable)
9 August 1940	Oskaloosa, US	daily rain	58.7 mm (2.3 in)	48.8 mm (1.9 in)	40 years	48 of 100 (Notable)
9 August 1940	Sahaswan, IN	daily rain	183.6 mm (7.2 in)	148.8 mm (5.9 in)	10 years	47 of 100 (Notable)
9 August 1940	Gopalpur, IN	monthly rain	205.7 mm (8.1 in)	67.3 mm (2.6 in)	0 years	46 of 100 (Notable)
9 August 1940	Ramdurg, IN	daily rain	71.1 mm (2.8 in)	50.0 mm (2.0 in)	15 years	45 of 100 (Notable)
9 August 1940	Aliganj, IN	daily rain	193.3 mm (7.6 in)	163.8 mm (6.4 in)	4 years	45 of 100 (Notable)
9 August 1940	Etah, IN	daily rain	156.2 mm (6.1 in)	103.4 mm (4.1 in)	4 years	45 of 100 (Notable)
9 August 1940	Bhagaon Bhogaon, IN	daily rain	118.9 mm (4.7 in)	96.8 mm (3.8 in)	6 years	45 of 100 (Notable)
9 August 1940	Jefferson City Wtp, US	daily rain	76.2 mm (3.0 in)	48.3 mm (1.9 in)	16 years	45 of 100 (Notable)
9 August 1940	Gudiyatham, IN	daily rain	78.2 mm (3.1 in)	43.9 mm (1.7 in)	34 years	43 of 100 (Notable)
9 August 1940	Kavali, IN	daily rain	43.2 mm (1.7 in)	36.3 mm (1.4 in)	28 years	41 of 100 (Notable)
9 August 1940	Rivers Inlet, CA	daily rain	64.8 mm (2.6 in)	46.3 mm (1.8 in)	12 years	40 of 100 (Notable)
9 August 1940	Kaimganj, IN	daily rain	147.3 mm (5.8 in)	76.2 mm (3.0 in)	10 years	40 of 100 (Notable)
9 August 1940	Hasanganj, IN	daily rain	119.9 mm (4.7 in)	72.9 mm (2.9 in)	4 years	40 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

1798 to 1940

Records set or tied on this calendar date in each year from 1798 to 1940. 1940 had 455 records.

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

Records on 08-09 in each year
Year	Records
1798	2
1800	1
1838	1
1845	3
1856	1
1859	3
1861	1
1863	2
1868	1
1870	1
1871	1
1873	1
1875	1
1878	1
1881	3
1884	2
1886	1
1887	1
1888	1
1889	1
1890	1
1891	4
1892	4
1893	3
1894	3
1895	1
1896	3
1897	7
1898	12
1899	4
1900	8
1901	3
1902	3
1903	6
1904	9
1905	5
1906	15
1907	9
1908	9
1909	51
1910	16
1911	44
1912	47
1913	76
1914	21
1915	61
1916	37
1917	46
1918	210
1919	49
1920	289
1921	36
1922	70
1923	73
1924	143
1925	307
1926	142
1927	391
1928	220
1929	127
1930	570
1931	399
1932	194
1933	250
1934	654
1935	587
1936	519
1937	351
1938	379
1939	480
1940	455
1941	372
1942	527
1943	366
1944	647
1945	365
1946	307
1947	544
1948	440
1949	715
1950	407
1951	405
1952	317
1953	363
1954	377
1955	433
1956	278
1957	347
1958	417
1959	453
1960	459
1961	347
1962	636
1963	500
1964	755
1965	632
1966	568
1967	457
1968	1,037
1969	527
1970	751
1971	543
1972	1,089
1973	547
1974	660
1975	790
1976	883
1977	453
1978	784
1979	630
1980	945
1981	941
1982	935
1983	839
1984	683
1985	714
1986	509
1987	927
1988	625
1989	2,082
1990	799
1991	988
1992	1,699
1993	702
1994	1,097
1995	1,417
1996	864
1997	1,446
1998	969
1999	1,370
2000	1,237
2001	1,485
2002	1,167
2003	1,344
2004	941
2005	1,001
2006	828
2007	1,687
2008	667
2009	1,028
2010	1,393
2011	1,177
2012	843
2013	761
2014	531
2015	595
2016	634
2017	773
2018	972
2019	717
2020	643
2021	523
2022	793
2023	820
2024	952
2025	799
2026	1,019

Download the Data

Data for records on 1940-08-09: 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 50	331
50 to 100	11
100 to 150	4
150 to 200	1
200 to 250	2