Weather Records on 4 September 1940

287 weather records were set or tied worldwide on 4 September 1940. Highest significance: Oktjabrskij-Gorodok, RU.

Key Facts for 4 September 1940

On 4 September 1940, 287 weather records were set or tied at long-record stations worldwide.
110 were record highs and 44 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 28 monthly and 258 daily.
Oktjabrskij-Gorodok set a daily record precipitation of 41.7 mm (1.6 in) on 4 September 1940.
Across 165 earlier years (1802 to 2026) the same calendar date averaged 452 records.

Record Map

287 stations

287 station records on 4 September 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 September 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Oktjabrskij-Gorodok	Russia	Record daily precipitation	41.7 mm (1.6 in)	55 of 100 (Notable)
Okmulgee Wtr Wks	United States	Record daily precipitation	90.2 mm (3.6 in)	49 of 100 (Notable)
Cape Leeuwin	Australia	Record daily precipitation	35.8 mm (1.4 in)	48 of 100 (Notable)
Wichita	United States	Record daily precipitation	95.8 mm (3.8 in)	48 of 100 (Notable)
Kachugaon	India	Record daily precipitation	344.2 mm (13.6 in)	44 of 100 (Notable)
Tezpur	India	Record daily precipitation	75.9 mm (3.0 in)	41 of 100 (Notable)
Adrian	United States	Record daily precipitation	34.0 mm (1.3 in)	41 of 100 (Notable)
Madrid	United States	Record daily precipitation	71.4 mm (2.8 in)	39 of 100 (Notable)
Joseph	United States	Record daily precipitation	28.4 mm (1.1 in)	39 of 100 (Notable)
Meeker 5 W	United States	Record daily precipitation	97.8 mm (3.9 in)	37 of 100 (Notable)
Nevada City	United States	Record daily precipitation	31.8 mm (1.3 in)	36 of 100 (Notable)
Ranka	India	Record daily precipitation	106.7 mm (4.2 in)	33 of 100 (Routine)
Newkirk 5NE	United States	Record daily precipitation	95.5 mm (3.8 in)	33 of 100 (Routine)
Tulsa	United States	Record daily precipitation	85.9 mm (3.4 in)	33 of 100 (Routine)
Beech Creek	United States	Record daily precipitation	34.5 mm (1.4 in)	31 of 100 (Routine)
Marnai	India	Record daily precipitation	121.7 mm (4.8 in)	29 of 100 (Routine)
Homestead 985	United States	Record daily precipitation	46.7 mm (1.8 in)	29 of 100 (Routine)
Indian Head Cda	Canada	Record high minimum temperature	21.7 C (71.1 F)	27 of 100 (Routine)
Pawhuska	United States	Record daily precipitation	76.5 mm (3.0 in)	27 of 100 (Routine)
Vale	United States	Record daily precipitation	26.9 mm (1.1 in)	27 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record low minimum temperature	0.1 C (32.2 F)	26 of 100 (Routine)
Dhubri	India	Record daily precipitation	105.2 mm (4.1 in)	26 of 100 (Routine)
Manatu	India	Record daily precipitation	95.3 mm (3.8 in)	26 of 100 (Routine)
Burlington	United States	Record daily precipitation	40.9 mm (1.6 in)	26 of 100 (Routine)
Winfield 3NE	United States	Record daily precipitation	88.9 mm (3.5 in)	26 of 100 (Routine)
Newton	United States	Record daily precipitation	97.8 mm (3.9 in)	25 of 100 (Routine)
Poplar 2 E	United States	Record high minimum temperature	20.6 C (69.1 F)	25 of 100 (Routine)
Prince Albert	Canada	Record high maximum temperature	35.0 C (95.0 F)	24 of 100 (Routine)
Dhing	India	Record daily precipitation	68.6 mm (2.7 in)	24 of 100 (Routine)
Wellington	United States	Record daily precipitation	66.0 mm (2.6 in)	24 of 100 (Routine)
Goalpara	India	Record daily precipitation	71.4 mm (2.8 in)	23 of 100 (Routine)
Sonari	India	Record daily precipitation	80.5 mm (3.2 in)	23 of 100 (Routine)
Quindalup	Australia	Record daily precipitation	26.7 mm (1.1 in)	22 of 100 (Routine)
Khairagarh	India	Record daily precipitation	65.0 mm (2.6 in)	22 of 100 (Routine)
Cherrapunji/P.S.	India	Record daily precipitation	254.0 mm (10.0 in)	22 of 100 (Routine)
Cherrapunji	India	Record daily precipitation	235.2 mm (9.3 in)	22 of 100 (Routine)
Crescent City 3 NNW	United States	Record high minimum temperature	18.3 C (64.9 F)	22 of 100 (Routine)
Hot Springs	United States	Record high minimum temperature	18.9 C (66.0 F)	22 of 100 (Routine)
Williston Sloulin Fld	United States	Record high minimum temperature	20.6 C (69.1 F)	22 of 100 (Routine)
Regina Int'l A	Canada	Record high minimum temperature	20.6 C (69.1 F)	21 of 100 (Routine)
Boreli	India	Record daily precipitation	92.2 mm (3.6 in)	21 of 100 (Routine)
Tufanganj	India	Record daily precipitation	270.5 mm (10.6 in)	21 of 100 (Routine)
Crosby	United States	Record high minimum temperature	18.3 C (64.9 F)	21 of 100 (Routine)
Umatilla	United States	Record low maximum temperature	17.2 C (63.0 F)	21 of 100 (Routine)
Payette	United States	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Dawson	Canada	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Riverside 7 SSW	United States	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Caldwell	United States	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Dayville	United States	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Poretskoye	Russia	Record daily precipitation	11.5 mm (0.5 in)	20 of 100 (Routine)
Elandsfontein	South Africa	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Emmett 2 E	United States	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Fort Chipewyan	Canada	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Thundelarra	Australia	Record daily precipitation	7.4 mm (0.29 in)	20 of 100 (Routine)
Menzies	Australia	Record daily precipitation	4.8 mm (0.19 in)	20 of 100 (Routine)
Idaho City	United States	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Watheroo	Australia	Record daily precipitation	13.2 mm (0.5 in)	20 of 100 (Routine)
Touchet	United States	Record daily precipitation	6.1 mm (0.24 in)	20 of 100 (Routine)
Grenfell	Canada	Record high maximum temperature	35.6 C (96.1 F)	20 of 100 (Routine)
Muenster	Canada	Record high minimum temperature	17.2 C (63.0 F)	20 of 100 (Routine)

Counts by Type and Timescale

287 records

Records set or tied on 4 September 1940 by type: Highest daily maximum 31, Lowest daily maximum 32, Highest daily minimum 79, Lowest daily minimum 12, Heaviest daily rainfall 133.

Records on 4 September 1940 by type
Record type	Records
Highest daily maximum	31
Lowest daily maximum	32
Highest daily minimum	79
Lowest daily minimum	12
Heaviest daily rainfall	133
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 4 September 1940 by timescale: all-time 1, monthly 28, daily 258.

How Much Records Were Beaten By

235 broken records

Margins by which the 235 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 94.0. Ties are not counted.

Top 20 by Significance

4 September 1940

Top 20 records on 4 September 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 September 1940	Oktjabrskij-Gorodok, RU	daily rain	41.7 mm (1.6 in)	30.1 mm (1.2 in)	32 years	55 of 100 (Notable)
4 September 1940	Okmulgee Wtr Wks, US	daily rain	90.2 mm (3.6 in)	79.0 mm (3.1 in)	22 years	49 of 100 (Notable)
4 September 1940	Cape Leeuwin, AU	daily rain	35.8 mm (1.4 in)	23.1 mm (0.9 in)	18 years	48 of 100 (Notable)
4 September 1940	Wichita, US	daily rain	95.8 mm (3.8 in)	63.8 mm (2.5 in)	22 years	48 of 100 (Notable)
4 September 1940	Kachugaon, IN	monthly rain	344.2 mm (13.6 in)	94.0 mm (3.7 in)	15 years	44 of 100 (Notable)
4 September 1940	Tezpur, IN	daily rain	75.9 mm (3.0 in)	40.1 mm (1.6 in)	39 years	41 of 100 (Notable)
4 September 1940	Adrian, US	monthly rain	34.0 mm (1.3 in)	10.9 mm (0.4 in)	20 years	41 of 100 (Notable)
4 September 1940	Madrid, US	monthly rain	71.4 mm (2.8 in)	20.6 mm (0.8 in)	15 years	39 of 100 (Notable)
4 September 1940	Joseph, US	daily rain	28.4 mm (1.1 in)	14.4 mm (0.6 in)	44 years	39 of 100 (Notable)
4 September 1940	Meeker 5 W, US	monthly rain	97.8 mm (3.9 in)	24.1 mm (0.9 in)	26 years	37 of 100 (Notable)
4 September 1940	Nevada City, US	daily rain	31.8 mm (1.3 in)	29.0 mm (1.1 in)	28 years	36 of 100 (Notable)
4 September 1940	Ranka, IN	daily rain	106.7 mm (4.2 in)	61.0 mm (2.4 in)	13 years	33 of 100 (Routine)
4 September 1940	Newkirk 5NE, US	monthly rain	95.5 mm (3.8 in)	14.2 mm (0.6 in)	38 years	33 of 100 (Routine)
4 September 1940	Tulsa, US	daily rain	85.9 mm (3.4 in)	33.1 mm (1.3 in)	22 years	33 of 100 (Routine)
4 September 1940	Beech Creek, US	monthly rain	34.5 mm (1.4 in)	6.1 mm (0.24 in)	22 years	31 of 100 (Routine)
4 September 1940	Marnai, IN	daily rain	121.7 mm (4.8 in)	50.6 mm (2.0 in)	37 years	29 of 100 (Routine)
4 September 1940	Homestead 985, US	daily rain	46.7 mm (1.8 in)	25.1 mm (1.0 in)	14 years	29 of 100 (Routine)
4 September 1940	Indian Head Cda, CA	monthly high min	21.7 C (71.1 F)	5.0 C (9.0 F)	8 years	27 of 100 (Routine)
4 September 1940	Pawhuska, US	daily rain	76.5 mm (3.0 in)	32.0 mm (1.3 in)	32 years	27 of 100 (Routine)
4 September 1940	Vale, US	monthly rain	26.9 mm (1.1 in)	2.8 mm (0.11 in)	22 years	27 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

1802 to 1940

Records set or tied on this calendar date in each year from 1802 to 1940. 1940 had 287 records.

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

Records on 09-04 in each year
Year	Records
1802	1
1805	1
1823	1
1833	1
1837	1
1839	1
1845	1
1847	1
1850	1
1854	1
1856	1
1857	1
1858	1
1861	1
1863	1
1864	1
1867	1
1868	1
1869	2
1871	1
1872	4
1874	1
1875	1
1877	1
1880	4
1881	1
1883	2
1885	3
1887	1
1888	2
1889	1
1890	1
1891	5
1894	4
1895	6
1896	1
1897	4
1898	9
1899	4
1900	1
1901	4
1902	4
1903	2
1904	7
1905	18
1906	16
1907	22
1908	9
1909	23
1910	91
1911	25
1912	29
1913	29
1914	19
1915	37
1916	24
1917	40
1918	96
1919	48
1920	105
1921	105
1922	62
1923	325
1924	167
1925	339
1926	256
1927	68
1928	341
1929	371
1930	102
1931	477
1932	429
1933	424
1934	393
1935	514
1936	309
1937	411
1938	236
1939	434
1940	287
1941	528
1942	323
1943	472
1944	341
1945	542
1946	431
1947	618
1948	409
1949	370
1950	642
1951	404
1952	645
1953	869
1954	372
1955	465
1956	586
1957	250
1958	384
1959	316
1960	552
1961	909
1962	733
1963	443
1964	507
1965	611
1966	428
1967	786
1968	546
1969	510
1970	644
1971	717
1972	513
1973	530
1974	2,279
1975	432
1976	582
1977	386
1978	940
1979	461
1980	355
1981	582
1982	617
1983	1,040
1984	1,107
1985	915
1986	663
1987	685
1988	1,259
1989	681
1990	787
1991	708
1992	1,132
1993	859
1994	1,001
1995	1,287
1996	907
1997	1,452
1998	1,564
1999	1,479
2000	1,336
2001	833
2002	767
2003	1,094
2004	898
2005	998
2006	1,268
2007	1,077
2008	1,335
2009	914
2010	1,804
2011	1,310
2012	1,209
2013	630
2014	461
2015	893
2016	597
2017	881
2018	758
2019	616
2020	957
2021	544
2022	1,256
2023	1,290
2024	985
2025	635
2026	1,222

Download the Data

Data for records on 1940-09-04: 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	201
20 to 40	24
40 to 60	4
60 to 80	4
80 to 100	2