Weather Records on 18 September 1940

402 weather records were set or tied worldwide on 18 September 1940. Highest significance: Antigo, US.

Key Facts for 18 September 1940

On 18 September 1940, 402 weather records were set or tied at long-record stations worldwide.
202 were record highs and 38 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 5 monthly and 396 daily.
Antigo set a daily record precipitation of 80.8 mm (3.2 in) on 18 September 1940.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 421 records.

Record Map

402 stations

402 station records on 18 September 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Antigo	United States	Record daily precipitation	80.8 mm (3.2 in)	53 of 100 (Notable)
Bhir	India	Record daily precipitation	143.8 mm (5.7 in)	48 of 100 (Notable)
Kaanapali AP 453.1	United States	Record daily precipitation	50.8 mm (2.0 in)	47 of 100 (Notable)
Kolhapur	India	Record daily precipitation	58.7 mm (2.3 in)	42 of 100 (Notable)
Cape Otway Lighthouse	Australia	Record high maximum temperature	25.6 C (78.1 F)	33 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record high maximum temperature	26.6 C (79.9 F)	32 of 100 (Routine)
Arhangelsk	Russia	Record high maximum temperature	21.8 C (71.2 F)	32 of 100 (Routine)
Banpur	India	Record daily precipitation	75.9 mm (3.0 in)	31 of 100 (Routine)
McKinley	United States	Record daily precipitation	31.5 mm (1.2 in)	29 of 100 (Routine)
Waiopai Rch 256	United States	Record daily precipitation	33.0 mm (1.3 in)	28 of 100 (Routine)
Bagewadi	India	Record daily precipitation	76.7 mm (3.0 in)	27 of 100 (Routine)
Junnar	India	Record daily precipitation	93.2 mm (3.7 in)	27 of 100 (Routine)
Merrill	United States	Record daily precipitation	44.7 mm (1.8 in)	26 of 100 (Routine)
Eugene	United States	Record daily precipitation	25.7 mm (1.0 in)	25 of 100 (Routine)
Hana 354	United States	Record daily precipitation	37.6 mm (1.5 in)	25 of 100 (Routine)
Bowie	United States	Record daily precipitation	25.4 mm (1.0 in)	24 of 100 (Routine)
Bogantungan Post Office	Australia	Record daily precipitation	30.5 mm (1.2 in)	23 of 100 (Routine)
Mulki	India	Record daily precipitation	68.6 mm (2.7 in)	23 of 100 (Routine)
Cairo Ezbekiya	Egypt	Record high minimum temperature	23.7 C (74.7 F)	22 of 100 (Routine)
Silverton	United States	Record daily precipitation	43.2 mm (1.7 in)	22 of 100 (Routine)
Prince Albert	Canada	Record high maximum temperature	31.7 C (89.1 F)	21 of 100 (Routine)
Indapur	India	Record daily precipitation	88.9 mm (3.5 in)	21 of 100 (Routine)
Vytegra	Russia	Record high minimum temperature	12.1 C (53.8 F)	21 of 100 (Routine)
Alta	United States	Record high minimum temperature	20.0 C (68.0 F)	21 of 100 (Routine)
Madison	United States	Record high maximum temperature	38.3 C (100.9 F)	21 of 100 (Routine)
Jacksonville	United States	Record low maximum temperature	16.1 C (61.0 F)	21 of 100 (Routine)
Ft Bidwell	United States	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Moscow U of I	United States	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Grace	United States	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Vale	United States	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Svyatoy Nos;Cape(Closed)	Russia	Record daily precipitation	23.3 mm (0.9 in)	20 of 100 (Routine)
Rooiberg	South Africa	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Lakeview 2 NNW	United States	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Gooding 2 S	United States	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Pullman Exp STN	United States	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Pilot Rock 1 SE	United States	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Cedarville	United States	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Wallowa	United States	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Winnemucca AP	United States	Record daily precipitation	5.8 mm (0.23 in)	20 of 100 (Routine)
Gordon Downs	Australia	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Kola-In-Murman	Russia	Record daily precipitation	14.1 mm (0.6 in)	20 of 100 (Routine)
Susanville 2SW	United States	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Tihoreck	Russia	Record daily precipitation	16.1 mm (0.6 in)	20 of 100 (Routine)
Blikana	South Africa	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Makwassie	South Africa	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Logan Utah St UNIV	United States	Record daily precipitation	9.1 mm (0.36 in)	20 of 100 (Routine)
Vardoe	Norway	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Casa Grande	United States	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Ashland	United States	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Klamath Falls 2 SSW	United States	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Altamura	South Africa	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Yonna	United States	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Indian Head Cda	Canada	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Regina Int'l A	Canada	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Oracle	United States	Record daily precipitation	12.4 mm (0.5 in)	20 of 100 (Routine)
Richfield Radio Ksvc	United States	Record daily precipitation	10.7 mm (0.4 in)	20 of 100 (Routine)
Roodekuil	South Africa	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Joseph	United States	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Weston 2 SE	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Rosalia	United States	Record daily precipitation	10.4 mm (0.4 in)	20 of 100 (Routine)

Counts by Type and Timescale

402 records

Records set or tied on 18 September 1940 by type: Highest daily maximum 78, Lowest daily maximum 36, Highest daily minimum 124, Lowest daily minimum 2, Heaviest daily rainfall 162.

Records on 18 September 1940 by type
Record type	Records
Highest daily maximum	78
Lowest daily maximum	36
Highest daily minimum	124
Lowest daily minimum	2
Heaviest daily rainfall	162
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 1940 by timescale: all-time 1, monthly 5, daily 396.

How Much Records Were Beaten By

324 broken records

Margins by which the 324 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 55.4. Ties are not counted.

Top 20 by Significance

18 September 1940

Top 20 records on 18 September 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1940	Antigo, US	daily rain	80.8 mm (3.2 in)	55.4 mm (2.2 in)	33 years	53 of 100 (Notable)
18 September 1940	Bhir, IN	all-time rain	143.8 mm (5.7 in)	27.5 mm (1.1 in)	39 years	48 of 100 (Notable)
18 September 1940	Kaanapali AP 453.1, US	monthly rain	50.8 mm (2.0 in)	17.5 mm (0.7 in)	0 years	47 of 100 (Notable)
18 September 1940	Kolhapur, IN	daily rain	58.7 mm (2.3 in)	34.1 mm (1.3 in)	26 years	42 of 100 (Notable)
18 September 1940	Cape Otway Lighthouse, AU	daily high max	25.6 C (78.1 F)	2.3 C (4.1 F)	67 years	33 of 100 (Routine)
18 September 1940	Hobart (Ellerslie Road), AU	daily high max	26.6 C (79.9 F)	3.8 C (6.8 F)	53 years	32 of 100 (Routine)
18 September 1940	Arhangelsk, RU	daily high max	21.8 C (71.2 F)	4.0 C (7.2 F)	57 years	32 of 100 (Routine)
18 September 1940	Banpur, IN	daily rain	75.9 mm (3.0 in)	39.1 mm (1.5 in)	17 years	31 of 100 (Routine)
18 September 1940	McKinley, US	daily rain	31.5 mm (1.2 in)	15.2 mm (0.6 in)	38 years	29 of 100 (Routine)
18 September 1940	Waiopai Rch 256, US	daily rain	33.0 mm (1.3 in)	33.0 mm (1.3 in)	35 years	28 of 100 (Routine)
18 September 1940	Bagewadi, IN	daily rain	76.7 mm (3.0 in)	36.1 mm (1.4 in)	3 years	27 of 100 (Routine)
18 September 1940	Junnar, IN	monthly rain	93.2 mm (3.7 in)	9.9 mm (0.39 in)	24 years	27 of 100 (Routine)
18 September 1940	Merrill, US	daily rain	44.7 mm (1.8 in)	18.0 mm (0.7 in)	33 years	26 of 100 (Routine)
18 September 1940	Eugene, US	daily rain	25.7 mm (1.0 in)	13.5 mm (0.5 in)	9 years	25 of 100 (Routine)
18 September 1940	Hana 354, US	daily rain	37.6 mm (1.5 in)	19.8 mm (0.8 in)	9 years	25 of 100 (Routine)
18 September 1940	Bowie, US	daily rain	25.4 mm (1.0 in)	15.0 mm (0.6 in)	9 years	24 of 100 (Routine)
18 September 1940	Bogantungan Post Office, AU	daily rain	30.5 mm (1.2 in)	15.0 mm (0.6 in)	23 years	23 of 100 (Routine)
18 September 1940	Mulki, IN	daily rain	68.6 mm (2.7 in)	15.3 mm (0.6 in)	37 years	23 of 100 (Routine)
18 September 1940	Cairo Ezbekiya, EG	daily high min	23.7 C (74.7 F)	1.7 C (3.1 F)	31 years	22 of 100 (Routine)
18 September 1940	Silverton, US	daily rain	43.2 mm (1.7 in)	11.2 mm (0.4 in)	15 years	22 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

1803 to 1940

Records set or tied on this calendar date in each year from 1803 to 1940. 1940 had 402 records.

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

Records on 09-18 in each year
Year	Records
1803	1
1811	1
1814	1
1819	1
1829	1
1832	1
1834	1
1835	1
1837	2
1847	2
1848	1
1849	1
1851	4
1859	1
1861	1
1865	1
1869	1
1871	1
1875	1
1876	2
1877	1
1879	1
1880	1
1881	1
1882	1
1885	1
1886	4
1889	6
1890	1
1891	1
1893	4
1894	2
1895	2
1896	4
1897	3
1898	5
1899	3
1900	2
1901	10
1902	8
1903	58
1904	6
1905	22
1906	16
1907	4
1908	11
1909	17
1910	5
1911	8
1912	43
1913	44
1914	56
1915	41
1916	58
1917	99
1918	57
1919	48
1920	56
1921	213
1922	45
1923	114
1924	62
1925	269
1926	205
1927	189
1928	114
1929	309
1930	124
1931	429
1932	226
1933	370
1934	188
1935	281
1936	155
1937	422
1938	373
1939	190
1940	402
1941	318
1942	1,001
1943	624
1944	503
1945	732
1946	576
1947	927
1948	427
1949	356
1950	370
1951	320
1952	340
1953	245
1954	446
1955	672
1956	587
1957	429
1958	491
1959	829
1960	351
1961	478
1962	360
1963	453
1964	282
1965	1,172
1966	498
1967	357
1968	763
1969	424
1970	377
1971	1,245
1972	691
1973	593
1974	559
1975	976
1976	615
1977	619
1978	1,162
1979	709
1980	652
1981	1,671
1982	603
1983	936
1984	951
1985	636
1986	730
1987	1,244
1988	997
1989	778
1990	904
1991	1,377
1992	821
1993	747
1994	852
1995	935
1996	1,237
1997	935
1998	1,038
1999	583
2000	1,146
2001	993
2002	828
2003	815
2004	1,027
2005	781
2006	1,309
2007	670
2008	697
2009	692
2010	1,040
2011	1,050
2012	922
2013	666
2014	682
2015	934
2016	893
2017	518
2018	1,200
2019	768
2020	682
2021	582
2022	613
2023	639
2024	687
2025	471
2026	864

Download the Data

Data for records on 1940-09-18: 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 10	278
10 to 20	35
20 to 30	5
30 to 40	5
40 to 50	0
50 to 60	1