Weather Records on 15 May 1939

351 weather records were set or tied worldwide on 15 May 1939. Highest significance: Forbesganj, IN.

Key Facts for 15 May 1939

On 15 May 1939, 351 weather records were set or tied at long-record stations worldwide.
115 were record highs and 156 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 351 daily.
Forbesganj set a daily record precipitation of 95.3 mm (3.8 in) on 15 May 1939.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 431 records.

Record Map

351 stations

351 station records on 15 May 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Forbesganj	India	Record daily precipitation	95.3 mm (3.8 in)	53 of 100 (Notable)
Beatrice	Canada	Record daily precipitation	38.9 mm (1.5 in)	45 of 100 (Notable)
Gangarampur	India	Record daily precipitation	77.0 mm (3.0 in)	38 of 100 (Notable)
Southampton	Canada	Record daily precipitation	27.7 mm (1.1 in)	37 of 100 (Notable)
Summerville 4W	United States	Record low maximum temperature	13.9 C (57.0 F)	34 of 100 (Routine)
Montcornet	France	Record daily precipitation	27.0 mm (1.1 in)	33 of 100 (Routine)
Society Hill 6 S	United States	Record low maximum temperature	13.3 C (55.9 F)	31 of 100 (Routine)
Woori Yallock	Australia	Record daily precipitation	28.4 mm (1.1 in)	30 of 100 (Routine)
Purnea	India	Record daily precipitation	47.2 mm (1.9 in)	29 of 100 (Routine)
Coldwater	Canada	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Eutawville	United States	Record low maximum temperature	13.3 C (55.9 F)	27 of 100 (Routine)
Bael Bael	Australia	Record daily precipitation	27.9 mm (1.1 in)	26 of 100 (Routine)
Bainbridge	United States	Record daily precipitation	30.2 mm (1.2 in)	26 of 100 (Routine)
Rockingham	United States	Record low maximum temperature	12.2 C (54.0 F)	26 of 100 (Routine)
Chatham	Canada	Record low minimum temperature	-2.8 C (27.0 F)	25 of 100 (Routine)
Barletta	South Africa	Record daily precipitation	29.7 mm (1.2 in)	25 of 100 (Routine)
Quitman 2 NW	United States	Record low maximum temperature	18.3 C (64.9 F)	25 of 100 (Routine)
Republic	United States	Record high minimum temperature	12.8 C (55.0 F)	25 of 100 (Routine)
Vaniyambadi	India	Record daily precipitation	46.2 mm (1.8 in)	24 of 100 (Routine)
Revelstoke	Canada	Record high maximum temperature	31.7 C (89.1 F)	23 of 100 (Routine)
St Georges	Canada	Record low minimum temperature	-5.6 C (21.9 F)	23 of 100 (Routine)
Waycross 4 NE	United States	Record low maximum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Salur	India	Record daily precipitation	34.3 mm (1.4 in)	22 of 100 (Routine)
Brunswick	United States	Record low maximum temperature	18.9 C (66.0 F)	22 of 100 (Routine)
Henderson 2 NNW	United States	Record low minimum temperature	1.7 C (35.1 F)	22 of 100 (Routine)
Lyndoch (Pewsey Vale)	Australia	Record daily precipitation	29.7 mm (1.2 in)	21 of 100 (Routine)
Greenville Dwtn AP	United States	Record low maximum temperature	17.8 C (64.0 F)	21 of 100 (Routine)
Putbus	Germany	Record daily precipitation	12.8 mm (0.5 in)	20 of 100 (Routine)
Mahackala	Russia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Wisley	United Kingdom	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Las Vegas	United States	Record daily precipitation	8.1 mm (0.32 in)	20 of 100 (Routine)
Balranald (Tillara)	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Piangil	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Owen Sound	Canada	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Boolcarrol	Australia	Record daily precipitation	12.2 mm (0.5 in)	20 of 100 (Routine)
Parry Sound	Canada	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Aurora	United States	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Leaghur	Australia	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Mallala	Australia	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Balfes Creek Post Office	Australia	Record daily precipitation	1.8 mm (0.07 in)	20 of 100 (Routine)
Orenburg	Russia	Record low minimum temperature	-3.4 C (25.9 F)	20 of 100 (Routine)
Beaufort Wwtp	United States	Record low minimum temperature	10.6 C (51.1 F)	20 of 100 (Routine)
Princeton	Canada	Record high maximum temperature	31.7 C (89.1 F)	19 of 100 (Routine)
Perundurai	India	Record daily precipitation	34.3 mm (1.4 in)	19 of 100 (Routine)
Pollachi	India	Record daily precipitation	50.8 mm (2.0 in)	19 of 100 (Routine)
Mathabhanga	India	Record daily precipitation	105.9 mm (4.2 in)	19 of 100 (Routine)
Viljujsk	Russia	Record high minimum temperature	7.1 C (44.8 F)	19 of 100 (Routine)
Cambridge Niab	United Kingdom	Record daily precipitation	14.1 mm (0.6 in)	19 of 100 (Routine)
Bainbridge	United States	Record low maximum temperature	20.0 C (68.0 F)	19 of 100 (Routine)
Eastman 1 W	United States	Record low maximum temperature	17.8 C (64.0 F)	19 of 100 (Routine)
Glennville 3NW	United States	Record daily precipitation	33.0 mm (1.3 in)	19 of 100 (Routine)
Hawkinsville	United States	Record low maximum temperature	16.7 C (62.1 F)	19 of 100 (Routine)
Louisville 1 E	United States	Record low maximum temperature	19.4 C (66.9 F)	19 of 100 (Routine)
Huntington	United States	Record high minimum temperature	17.2 C (63.0 F)	19 of 100 (Routine)
Touchet	United States	Record high minimum temperature	19.4 C (66.9 F)	19 of 100 (Routine)
Balmoral (Post Office)	Australia	Record daily precipitation	26.4 mm (1.0 in)	18 of 100 (Routine)
Tufanganj	India	Record daily precipitation	108.0 mm (4.3 in)	18 of 100 (Routine)
Colchester 2 W	United States	Record low minimum temperature	-2.2 C (28.0 F)	18 of 100 (Routine)
Milford 2 SE	United States	Record low maximum temperature	13.9 C (57.0 F)	18 of 100 (Routine)
Tallapoosa 2 N	United States	Record low maximum temperature	20.0 C (68.0 F)	18 of 100 (Routine)

Counts by Type and Timescale

351 records

Records set or tied on 15 May 1939 by type: Highest daily maximum 69, Lowest daily maximum 65, Highest daily minimum 46, Lowest daily minimum 91, Heaviest daily rainfall 80.

Records on 15 May 1939 by type
Record type	Records
Highest daily maximum	69
Lowest daily maximum	65
Highest daily minimum	46
Lowest daily minimum	91
Heaviest daily rainfall	80
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 May 1939 by timescale: all-time 0, monthly 0, daily 351.

How Much Records Were Beaten By

261 broken records

Margins by which the 261 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 83.1. Ties are not counted.

Top 20 by Significance

15 May 1939

Top 20 records on 15 May 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1939	Forbesganj, IN	daily rain	95.3 mm (3.8 in)	83.1 mm (3.3 in)	34 years	53 of 100 (Notable)
15 May 1939	Beatrice, CA	daily rain	38.9 mm (1.5 in)	16.5 mm (0.6 in)	59 years	45 of 100 (Notable)
15 May 1939	Gangarampur, IN	daily rain	77.0 mm (3.0 in)	62.5 mm (2.5 in)	14 years	38 of 100 (Notable)
15 May 1939	Southampton, CA	daily rain	27.7 mm (1.1 in)	9.9 mm (0.39 in)	62 years	37 of 100 (Notable)
15 May 1939	Summerville 4W, US	daily low max	13.9 C (57.0 F)	8.3 C (14.9 F)	24 years	34 of 100 (Routine)
15 May 1939	Montcornet, FR	daily rain	27.0 mm (1.1 in)	10.9 mm (0.4 in)	32 years	33 of 100 (Routine)
15 May 1939	Society Hill 6 S, US	daily low max	13.3 C (55.9 F)	6.1 C (11.0 F)	43 years	31 of 100 (Routine)
15 May 1939	Woori Yallock, AU	daily rain	28.4 mm (1.1 in)	14.7 mm (0.6 in)	21 years	30 of 100 (Routine)
15 May 1939	Purnea, IN	daily rain	47.2 mm (1.9 in)	24.8 mm (1.0 in)	32 years	29 of 100 (Routine)
15 May 1939	Coldwater, CA	daily rain	27.9 mm (1.1 in)	16.5 mm (0.6 in)	8 years	28 of 100 (Routine)
15 May 1939	Eutawville, US	daily low max	13.3 C (55.9 F)	6.7 C (12.1 F)	21 years	27 of 100 (Routine)
15 May 1939	Bael Bael, AU	daily rain	27.9 mm (1.1 in)	10.9 mm (0.4 in)	20 years	26 of 100 (Routine)
15 May 1939	Bainbridge, US	daily rain	30.2 mm (1.2 in)	16.2 mm (0.6 in)	37 years	26 of 100 (Routine)
15 May 1939	Rockingham, US	daily low max	12.2 C (54.0 F)	7.2 C (13.0 F)	20 years	26 of 100 (Routine)
15 May 1939	Chatham, CA	daily low min	-2.8 C (27.0 F)	0.6 C (1.1 F)	60 years	25 of 100 (Routine)
15 May 1939	Barletta, ZA	daily rain	29.7 mm (1.2 in)	17.5 mm (0.7 in)	16 years	25 of 100 (Routine)
15 May 1939	Quitman 2 NW, US	daily low max	18.3 C (64.9 F)	5.6 C (10.1 F)	21 years	25 of 100 (Routine)
15 May 1939	Republic, US	daily high min	12.8 C (55.0 F)	3.9 C (7.0 F)	36 years	25 of 100 (Routine)
15 May 1939	Vaniyambadi, IN	daily rain	46.2 mm (1.8 in)	24.9 mm (1.0 in)	16 years	24 of 100 (Routine)
15 May 1939	Revelstoke, CA	daily high max	31.7 C (89.1 F)	3.9 C (7.0 F)	40 years	23 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

1820 to 1939

Records set or tied on this calendar date in each year from 1820 to 1939. 1939 had 351 records.

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

Records on 05-15 in each year
Year	Records
1820	1
1825	1
1831	1
1832	1
1837	2
1845	1
1847	2
1848	1
1855	2
1857	2
1859	1
1862	1
1863	1
1865	1
1866	2
1867	1
1868	2
1870	1
1871	3
1874	2
1876	4
1878	1
1879	2
1881	1
1883	1
1885	1
1886	2
1888	3
1891	3
1893	5
1894	2
1895	4
1896	2
1897	4
1898	3
1899	9
1900	9
1901	2
1902	9
1903	4
1904	13
1905	16
1906	10
1907	27
1908	25
1909	89
1910	27
1911	27
1912	26
1913	60
1914	16
1915	236
1916	27
1917	80
1918	133
1919	25
1920	58
1921	92
1922	30
1923	125
1924	174
1925	100
1926	161
1927	191
1928	144
1929	161
1930	136
1931	459
1932	368
1933	439
1934	227
1935	288
1936	372
1937	373
1938	393
1939	351
1940	179
1941	454
1942	701
1943	568
1944	630
1945	588
1946	238
1947	334
1948	264
1949	363
1950	260
1951	736
1952	476
1953	426
1954	355
1955	538
1956	466
1957	521
1958	605
1959	764
1960	291
1961	508
1962	1,128
1963	782
1964	347
1965	320
1966	389
1967	609
1968	1,019
1969	790
1970	512
1971	351
1972	484
1973	818
1974	1,230
1975	372
1976	803
1977	1,186
1978	922
1979	404
1980	625
1981	586
1982	500
1983	1,215
1984	1,059
1985	649
1986	679
1987	1,073
1988	643
1989	552
1990	776
1991	1,179
1992	944
1993	784
1994	910
1995	1,750
1996	1,452
1997	1,175
1998	1,641
1999	810
2000	850
2001	1,280
2002	801
2003	1,023
2004	1,046
2005	767
2006	955
2007	949
2008	995
2009	675
2010	1,088
2011	1,298
2012	751
2013	1,081
2014	1,411
2015	717
2016	890
2017	435
2018	1,074
2019	627
2020	472
2021	412
2022	847
2023	566
2024	596
2025	801
2026	481

Download the Data

Data for records on 1939-05-15: 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	253
20 to 40	6
40 to 60	0
60 to 80	1
80 to 100	1