Weather Records on 17 September 1939

294 weather records were set or tied worldwide on 17 September 1939. Highest significance: Denkanikottah, IN.

Key Facts for 17 September 1939

On 17 September 1939, 294 weather records were set or tied at long-record stations worldwide.
138 were record highs and 21 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 287 daily.
Denkanikottah set a daily record precipitation of 102.4 mm (4.0 in) on 17 September 1939.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 424 records.

Record Map

294 stations

294 station records on 17 September 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Denkanikottah	India	Record daily precipitation	102.4 mm (4.0 in)	54 of 100 (Notable)
Bisbee	United States	Record daily precipitation	92.2 mm (3.6 in)	53 of 100 (Notable)
Agra	India	Record daily precipitation	139.2 mm (5.5 in)	50 of 100 (Notable)
Agra	India	Record daily precipitation	126.0 mm (5.0 in)	50 of 100 (Notable)
Kamalapuram	India	Record daily precipitation	138.7 mm (5.5 in)	48 of 100 (Notable)
Pakala	India	Record daily precipitation	96.5 mm (3.8 in)	47 of 100 (Notable)
Queenstown (Copper Mine)	Australia	Record daily precipitation	67.6 mm (2.7 in)	46 of 100 (Notable)
Jena Sternwarte	Germany	Record daily precipitation	25.6 mm (1.0 in)	46 of 100 (Notable)
Malur	India	Record daily precipitation	83.3 mm (3.3 in)	41 of 100 (Notable)
Gormanston (Gould Street)	Australia	Record daily precipitation	75.7 mm (3.0 in)	40 of 100 (Notable)
Halle	Germany	Record daily precipitation	35.6 mm (1.4 in)	40 of 100 (Notable)
Maysville Wwtp	United States	Record daily precipitation	83.1 mm (3.3 in)	37 of 100 (Notable)
Greiz-Dolau	Germany	Record daily precipitation	29.6 mm (1.2 in)	36 of 100 (Notable)
Capitan	United States	Record daily precipitation	44.7 mm (1.8 in)	35 of 100 (Notable)
Mountainair	United States	Record daily precipitation	31.8 mm (1.3 in)	35 of 100 (Notable)
Chickballapur	India	Record daily precipitation	78.7 mm (3.1 in)	34 of 100 (Routine)
Sikandarabad	India	Record daily precipitation	102.9 mm (4.1 in)	34 of 100 (Routine)
Turuvekere	India	Record daily precipitation	91.2 mm (3.6 in)	33 of 100 (Routine)
Clausthal-Zellerfeld	Germany	Record daily precipitation	25.2 mm (1.0 in)	32 of 100 (Routine)
Cuddapah	India	Record daily precipitation	111.8 mm (4.4 in)	32 of 100 (Routine)
Proddatur	India	Record daily precipitation	80.8 mm (3.2 in)	31 of 100 (Routine)
Ottoshoop (Pol)	South Africa	Record daily precipitation	31.8 mm (1.3 in)	31 of 100 (Routine)
Gudur(Guduru)	India	Record daily precipitation	83.1 mm (3.3 in)	29 of 100 (Routine)
Gudibanda	India	Record daily precipitation	71.1 mm (2.8 in)	27 of 100 (Routine)
Qu'appelle	Canada	Record high maximum temperature	30.6 C (87.1 F)	26 of 100 (Routine)
Woodbury	United States	Record daily precipitation	39.6 mm (1.6 in)	26 of 100 (Routine)
Razole(Rajole)	India	Record daily precipitation	71.1 mm (2.8 in)	25 of 100 (Routine)
Ambah	India	Record daily precipitation	99.1 mm (3.9 in)	25 of 100 (Routine)
Marengo	United States	Record daily precipitation	48.3 mm (1.9 in)	25 of 100 (Routine)
Bosque del Apache	United States	Record low maximum temperature	21.1 C (70.0 F)	25 of 100 (Routine)
Gauribidanur	India	Record daily precipitation	55.9 mm (2.2 in)	24 of 100 (Routine)
Panruti	India	Record daily precipitation	61.0 mm (2.4 in)	24 of 100 (Routine)
Naboomspruit (Pol)	South Africa	Record daily precipitation	31.2 mm (1.2 in)	24 of 100 (Routine)
Haskote	India	Record daily precipitation	96.5 mm (3.8 in)	23 of 100 (Routine)
Mulbagal	India	Record daily precipitation	48.3 mm (1.9 in)	23 of 100 (Routine)
Gubbi Sr	India	Record daily precipitation	54.4 mm (2.1 in)	23 of 100 (Routine)
Vanur	India	Record daily precipitation	65.8 mm (2.6 in)	23 of 100 (Routine)
Sandheads	India	Record daily precipitation	41.9 mm (1.6 in)	23 of 100 (Routine)
Machadodorp	South Africa	Record daily precipitation	29.0 mm (1.1 in)	23 of 100 (Routine)
Madison	United States	Record high maximum temperature	33.9 C (93.0 F)	23 of 100 (Routine)
Winthrop UNIV	United States	Record high minimum temperature	25.6 C (78.1 F)	23 of 100 (Routine)
Dauphin	Canada	Record high maximum temperature	28.9 C (84.0 F)	22 of 100 (Routine)
Orillia	Canada	Record low maximum temperature	10.0 C (50.0 F)	22 of 100 (Routine)
Mudukulathur	India	Record daily precipitation	36.1 mm (1.4 in)	22 of 100 (Routine)
Brandon Cda	Canada	Record high maximum temperature	30.0 C (86.0 F)	21 of 100 (Routine)
Hosadurga	India	Record daily precipitation	28.4 mm (1.1 in)	21 of 100 (Routine)
Srinivaspur	India	Record daily precipitation	56.4 mm (2.2 in)	21 of 100 (Routine)
Vytegra	Russia	Record low minimum temperature	-4.0 C (24.8 F)	21 of 100 (Routine)
Karlstad	Sweden	Record high maximum temperature	21.9 C (71.4 F)	21 of 100 (Routine)
Auburn	United States	Record high maximum temperature	34.4 C (93.9 F)	21 of 100 (Routine)
Dannemora	United States	Record high maximum temperature	32.2 C (90.0 F)	21 of 100 (Routine)
Grenora	United States	Record high minimum temperature	16.7 C (62.1 F)	21 of 100 (Routine)
Wittenberg	Germany	Record daily precipitation	22.5 mm (0.9 in)	20 of 100 (Routine)
Palmaryville	South Africa	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Bratsk	Russia	Record daily precipitation	11.3 mm (0.4 in)	20 of 100 (Routine)
Nurnberg	Germany	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Clifton	United States	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Berlin-Dahlem (Lfag)	Germany	Record daily precipitation	15.1 mm (0.6 in)	20 of 100 (Routine)
New Norfolk	Australia	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Leipzig-Holzhausen	Germany	Record daily precipitation	10.5 mm (0.4 in)	20 of 100 (Routine)

Counts by Type and Timescale

294 records

Records set or tied on 17 September 1939 by type: Highest daily maximum 97, Lowest daily maximum 13, Highest daily minimum 41, Lowest daily minimum 8, Heaviest daily rainfall 134, Deepest snow cover 1.

Records on 17 September 1939 by type
Record type	Records
Highest daily maximum	97
Lowest daily maximum	13
Highest daily minimum	41
Lowest daily minimum	8
Heaviest daily rainfall	134
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 17 September 1939 by timescale: all-time 0, monthly 7, daily 287.

How Much Records Were Beaten By

241 broken records

Margins by which the 241 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 105.7. Ties are not counted.

Top 20 by Significance

17 September 1939

Top 20 records on 17 September 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1939	Denkanikottah, IN	daily rain	102.4 mm (4.0 in)	82.8 mm (3.3 in)	37 years	54 of 100 (Notable)
17 September 1939	Bisbee, US	daily rain	92.2 mm (3.6 in)	71.4 mm (2.8 in)	32 years	53 of 100 (Notable)
17 September 1939	Agra, IN	daily rain	139.2 mm (5.5 in)	105.7 mm (4.2 in)	24 years	50 of 100 (Notable)
17 September 1939	Agra, IN	daily rain	126.0 mm (5.0 in)	83.6 mm (3.3 in)	24 years	50 of 100 (Notable)
17 September 1939	Kamalapuram, IN	monthly rain	138.7 mm (5.5 in)	44.5 mm (1.8 in)	30 years	48 of 100 (Notable)
17 September 1939	Pakala, IN	daily rain	96.5 mm (3.8 in)	66.5 mm (2.6 in)	30 years	47 of 100 (Notable)
17 September 1939	Queenstown (Copper Mine), AU	daily rain	67.6 mm (2.7 in)	40.4 mm (1.6 in)	20 years	46 of 100 (Notable)
17 September 1939	Jena Sternwarte, DE	daily rain	25.6 mm (1.0 in)	13.0 mm (0.5 in)	36 years	46 of 100 (Notable)
17 September 1939	Malur, IN	daily rain	83.3 mm (3.3 in)	65.0 mm (2.6 in)	9 years	41 of 100 (Notable)
17 September 1939	Gormanston (Gould Street), AU	daily rain	75.7 mm (3.0 in)	34.6 mm (1.4 in)	20 years	40 of 100 (Notable)
17 September 1939	Halle, DE	monthly rain	35.6 mm (1.4 in)	8.0 mm (0.31 in)	30 years	40 of 100 (Notable)
17 September 1939	Maysville Wwtp, US	monthly rain	83.1 mm (3.3 in)	18.3 mm (0.7 in)	22 years	37 of 100 (Notable)
17 September 1939	Greiz-Dolau, DE	daily rain	29.6 mm (1.2 in)	14.5 mm (0.6 in)	12 years	36 of 100 (Notable)
17 September 1939	Capitan, US	daily rain	44.7 mm (1.8 in)	29.5 mm (1.2 in)	14 years	35 of 100 (Notable)
17 September 1939	Mountainair, US	daily rain	31.8 mm (1.3 in)	23.2 mm (0.9 in)	28 years	35 of 100 (Notable)
17 September 1939	Chickballapur, IN	daily rain	78.7 mm (3.1 in)	43.1 mm (1.7 in)	28 years	34 of 100 (Routine)
17 September 1939	Sikandarabad, IN	daily rain	102.9 mm (4.1 in)	76.0 mm (3.0 in)	24 years	34 of 100 (Routine)
17 September 1939	Turuvekere, IN	daily rain	91.2 mm (3.6 in)	44.7 mm (1.8 in)	24 years	33 of 100 (Routine)
17 September 1939	Clausthal-Zellerfeld, DE	daily rain	25.2 mm (1.0 in)	14.3 mm (0.6 in)	37 years	32 of 100 (Routine)
17 September 1939	Cuddapah, IN	daily rain	111.8 mm (4.4 in)	37.9 mm (1.5 in)	28 years	32 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

1796 to 1939

Records set or tied on this calendar date in each year from 1796 to 1939. 1939 had 294 records.

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

Records on 09-17 in each year
Year	Records
1796	1
1797	1
1805	1
1833	1
1834	1
1837	2
1845	1
1847	3
1848	1
1850	1
1851	2
1853	2
1854	2
1859	1
1862	1
1867	1
1870	1
1871	1
1872	1
1873	1
1874	1
1875	1
1877	1
1881	1
1882	2
1884	3
1885	3
1886	6
1888	2
1889	8
1891	1
1893	3
1894	1
1895	4
1896	9
1897	4
1898	7
1899	1
1900	4
1901	5
1902	5
1903	28
1904	2
1905	17
1906	10
1907	15
1908	13
1909	7
1910	38
1911	15
1912	17
1913	28
1914	38
1915	48
1916	40
1917	255
1918	41
1919	21
1920	40
1921	66
1922	47
1923	159
1924	80
1925	338
1926	154
1927	420
1928	78
1929	168
1930	147
1931	564
1932	425
1933	415
1934	246
1935	321
1936	219
1937	463
1938	363
1939	294
1940	326
1941	328
1942	581
1943	513
1944	403
1945	614
1946	620
1947	680
1948	630
1949	292
1950	412
1951	359
1952	263
1953	344
1954	449
1955	649
1956	437
1957	405
1958	806
1959	1,210
1960	385
1961	657
1962	432
1963	297
1964	559
1965	1,394
1966	523
1967	331
1968	691
1969	352
1970	412
1971	898
1972	556
1973	638
1974	491
1975	478
1976	636
1977	641
1978	764
1979	804
1980	794
1981	1,155
1982	606
1983	862
1984	1,006
1985	448
1986	1,314
1987	926
1988	982
1989	863
1990	650
1991	1,407
1992	686
1993	950
1994	986
1995	1,145
1996	1,342
1997	1,057
1998	1,137
1999	1,102
2000	1,318
2001	895
2002	1,025
2003	586
2004	872
2005	1,042
2006	1,344
2007	752
2008	886
2009	871
2010	907
2011	1,116
2012	597
2013	1,253
2014	571
2015	953
2016	707
2017	455
2018	899
2019	774
2020	651
2021	345
2022	313
2023	646
2024	954
2025	634
2026	968

Download the Data

Data for records on 1939-09-17: 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	202
20 to 40	27
40 to 60	5
60 to 80	4
80 to 100	2
100 to 120	1