Weather Records on 18 September 1939

190 weather records were set or tied worldwide on 18 September 1939. Highest significance: Gopalpur, IN.

Key Facts for 18 September 1939

On 18 September 1939, 190 weather records were set or tied at long-record stations worldwide.
93 were record highs and 39 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 185 daily.
Gopalpur set a daily record precipitation of 101.6 mm (4.0 in) on 18 September 1939.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 423 records.

Record Map

190 stations

190 station records on 18 September 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Gopalpur	India	Record daily precipitation	101.6 mm (4.0 in)	33 of 100 (Routine)
Sepao	India	Record daily precipitation	127.5 mm (5.0 in)	28 of 100 (Routine)
Nalgonda	India	Record daily precipitation	59.2 mm (2.3 in)	26 of 100 (Routine)
Putbus	Germany	Record high minimum temperature	14.2 C (57.6 F)	25 of 100 (Routine)
Pottangi	India	Record daily precipitation	73.2 mm (2.9 in)	25 of 100 (Routine)
Fatehpur Sikri	India	Record daily precipitation	141.7 mm (5.6 in)	24 of 100 (Routine)
Perm	Russia	Record low minimum temperature	-3.0 C (26.6 F)	24 of 100 (Routine)
Brocken	Germany	Record daily precipitation	38.3 mm (1.5 in)	23 of 100 (Routine)
Venukonda	India	Record daily precipitation	49.0 mm (1.9 in)	23 of 100 (Routine)
Oakland	United States	Record high maximum temperature	34.4 C (93.9 F)	23 of 100 (Routine)
Schriever	United States	Record daily precipitation	111.8 mm (4.4 in)	23 of 100 (Routine)
Nashua 2 NNW	United States	Record low minimum temperature	0.0 C (32.0 F)	23 of 100 (Routine)
Bloomfield	United States	Record high maximum temperature	36.7 C (98.1 F)	22 of 100 (Routine)
Minnedosa	Canada	Record high maximum temperature	30.0 C (86.0 F)	21 of 100 (Routine)
Sadabad	India	Record daily precipitation	71.4 mm (2.8 in)	21 of 100 (Routine)
El Cajon 2 E	United States	Record daily precipitation	4.8 mm (0.19 in)	20 of 100 (Routine)
Bad Lauchstadt	Germany	Record daily precipitation	19.4 mm (0.8 in)	20 of 100 (Routine)
Berlin-Dahlem	Germany	Record daily precipitation	15.1 mm (0.6 in)	20 of 100 (Routine)
Indapur	India	Record daily precipitation	57.2 mm (2.3 in)	20 of 100 (Routine)
Firozabad	India	Record daily precipitation	80.0 mm (3.1 in)	20 of 100 (Routine)
Pasadena	United States	Record high minimum temperature	21.7 C (71.1 F)	20 of 100 (Routine)
Saskatoon Diefenbaker Int'l A	Canada	Record high minimum temperature	10.0 C (50.0 F)	19 of 100 (Routine)
Ebrach	Germany	Record daily precipitation	15.3 mm (0.6 in)	19 of 100 (Routine)
Agra	India	Record daily precipitation	115.3 mm (4.5 in)	19 of 100 (Routine)
Ufa	Russia	Record low minimum temperature	-1.6 C (29.1 F)	19 of 100 (Routine)
Zuerich/Fluntern	Switzerland	Record daily precipitation	22.9 mm (0.9 in)	19 of 100 (Routine)
San Diego Wbo	United States	Record high maximum temperature	33.9 C (93.0 F)	19 of 100 (Routine)
Ada	United States	Record high maximum temperature	32.8 C (91.0 F)	19 of 100 (Routine)
Brome	Canada	Record low minimum temperature	-2.2 C (28.0 F)	18 of 100 (Routine)
Hathras	India	Record daily precipitation	62.5 mm (2.5 in)	18 of 100 (Routine)
Santa Barbara	United States	Record high maximum temperature	38.9 C (102.0 F)	18 of 100 (Routine)
Tarpon Spgs Sewage Plt	United States	Record high maximum temperature	35.6 C (96.1 F)	18 of 100 (Routine)
Flatonia 4SE	United States	Record daily precipitation	22.9 mm (0.9 in)	18 of 100 (Routine)
Halle	Germany	Record daily precipitation	14.1 mm (0.6 in)	17 of 100 (Routine)
Malkangiri	India	Record daily precipitation	57.7 mm (2.3 in)	17 of 100 (Routine)
Pomona/Fairplex	United States	Record high maximum temperature	41.1 C (106.0 F)	17 of 100 (Routine)
Represa	United States	Record high maximum temperature	35.6 C (96.1 F)	17 of 100 (Routine)
Amenia	United States	Record high maximum temperature	32.8 C (91.0 F)	17 of 100 (Routine)
University Exp STN	United States	Record low maximum temperature	1.7 C (35.1 F)	17 of 100 (Routine)
Kasganj	India	Record daily precipitation	74.9 mm (2.9 in)	16 of 100 (Routine)
Derby	South Africa	Record daily precipitation	30.7 mm (1.2 in)	16 of 100 (Routine)
Tallapoosa 2 N	United States	Record daily precipitation	17.3 mm (0.7 in)	16 of 100 (Routine)
Warroad	United States	Record high maximum temperature	28.9 C (84.0 F)	16 of 100 (Routine)
Vicksburg	United States	Record daily precipitation	17.8 mm (0.7 in)	16 of 100 (Routine)
Sydney (Observatory Hill)	Australia	Record high minimum temperature	15.0 C (59.0 F)	15 of 100 (Routine)
Morden	Canada	Record high maximum temperature	33.3 C (91.9 F)	15 of 100 (Routine)
St John's	Canada	Record low maximum temperature	6.7 C (44.1 F)	15 of 100 (Routine)
Ostrov Sosnovez	Russia	Record daily precipitation	4.9 mm (0.19 in)	15 of 100 (Routine)
Seligman	United States	Record daily precipitation	15.0 mm (0.6 in)	15 of 100 (Routine)
Claremont Pomona Clg	United States	Record high maximum temperature	43.3 C (109.9 F)	15 of 100 (Routine)
Hollister 1 SW	United States	Record high minimum temperature	17.2 C (63.0 F)	15 of 100 (Routine)
Hubbard	Canada	Record high maximum temperature	27.2 C (81.0 F)	14 of 100 (Routine)
Brandon Cda	Canada	Record high maximum temperature	32.2 C (90.0 F)	14 of 100 (Routine)
Morden	Canada	Record high minimum temperature	16.7 C (62.1 F)	14 of 100 (Routine)
Huntsville	Canada	Record low minimum temperature	-1.1 C (30.0 F)	14 of 100 (Routine)
Sairang	India	Record daily precipitation	78.5 mm (3.1 in)	14 of 100 (Routine)
Athmalik	India	Record daily precipitation	37.6 mm (1.5 in)	14 of 100 (Routine)
Jalesar	India	Record daily precipitation	71.1 mm (2.8 in)	14 of 100 (Routine)
Kiev	Ukraine	Record high minimum temperature	16.2 C (61.2 F)	14 of 100 (Routine)
Claremont Pomona Clg	United States	Record high minimum temperature	22.2 C (72.0 F)	14 of 100 (Routine)

Counts by Type and Timescale

190 records

Records set or tied on 18 September 1939 by type: Highest daily maximum 58, Lowest daily maximum 4, Highest daily minimum 35, Lowest daily minimum 35, Heaviest daily rainfall 58.

Records on 18 September 1939 by type
Record type	Records
Highest daily maximum	58
Lowest daily maximum	4
Highest daily minimum	35
Lowest daily minimum	35
Heaviest daily rainfall	58
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 1939 by timescale: all-time 0, monthly 5, daily 185.

How Much Records Were Beaten By

143 broken records

Margins by which the 143 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 64.8. Ties are not counted.

Top 20 by Significance

18 September 1939

Top 20 records on 18 September 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1939	Gopalpur, IN	daily rain	101.6 mm (4.0 in)	57.1 mm (2.2 in)	24 years	33 of 100 (Routine)
18 September 1939	Sepao, IN	daily rain	127.5 mm (5.0 in)	64.8 mm (2.6 in)	5 years	28 of 100 (Routine)
18 September 1939	Nalgonda, IN	daily rain	59.2 mm (2.3 in)	33.8 mm (1.3 in)	22 years	26 of 100 (Routine)
18 September 1939	Putbus, DE	daily high min	14.2 C (57.6 F)	0.1 C (0.2 F)	56 years	25 of 100 (Routine)
18 September 1939	Pottangi, IN	daily rain	73.2 mm (2.9 in)	36.1 mm (1.4 in)	25 years	25 of 100 (Routine)
18 September 1939	Fatehpur Sikri, IN	daily rain	141.7 mm (5.6 in)	43.7 mm (1.7 in)	5 years	24 of 100 (Routine)
18 September 1939	Perm, RU	daily low min	-3.0 C (26.6 F)	2.1 C (3.8 F)	47 years	24 of 100 (Routine)
18 September 1939	Brocken, DE	daily rain	38.3 mm (1.5 in)	11.2 mm (0.4 in)	29 years	23 of 100 (Routine)
18 September 1939	Venukonda, IN	daily rain	49.0 mm (1.9 in)	18.8 mm (0.7 in)	28 years	23 of 100 (Routine)
18 September 1939	Oakland, US	daily high max	34.4 C (93.9 F)	5.0 C (9.0 F)	20 years	23 of 100 (Routine)
18 September 1939	Schriever, US	daily rain	111.8 mm (4.4 in)	28.0 mm (1.1 in)	6 years	23 of 100 (Routine)
18 September 1939	Nashua 2 NNW, US	daily low min	0.0 C (32.0 F)	1.7 C (3.1 F)	51 years	23 of 100 (Routine)
18 September 1939	Bloomfield, US	monthly high max	36.7 C (98.1 F)	3.4 C (6.1 F)	8 years	22 of 100 (Routine)
18 September 1939	Minnedosa, CA	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	47 years	21 of 100 (Routine)
18 September 1939	Sadabad, IN	daily rain	71.4 mm (2.8 in)	24.9 mm (1.0 in)	24 years	21 of 100 (Routine)
18 September 1939	El Cajon 2 E, US	daily rain	4.8 mm (0.19 in)	4.8 mm (0.19 in)	39 years	20 of 100 (Routine)
18 September 1939	Bad Lauchstadt, DE	daily rain	19.4 mm (0.8 in)	4.9 mm (0.19 in)	29 years	20 of 100 (Routine)
18 September 1939	Berlin-Dahlem, DE	daily rain	15.1 mm (0.6 in)	4.5 mm (0.18 in)	24 years	20 of 100 (Routine)
18 September 1939	Indapur, IN	daily rain	57.2 mm (2.3 in)	14.0 mm (0.6 in)	36 years	20 of 100 (Routine)
18 September 1939	Firozabad, IN	daily rain	80.0 mm (3.1 in)	43.2 mm (1.7 in)	5 years	20 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 1939

Records set or tied on this calendar date in each year from 1803 to 1939. 1939 had 190 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 1939-09-18: 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	123
10 to 20	11
20 to 30	2
30 to 40	3
40 to 50	2
50 to 60	1
60 to 70	1