Weather Records on 15 May 1940

179 weather records were set or tied worldwide on 15 May 1940. Highest significance: Watheroo, AU.

Key Facts for 15 May 1940

On 15 May 1940, 179 weather records were set or tied at long-record stations worldwide.
93 were record highs and 43 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 178 daily.
Watheroo set a daily record precipitation of 29.5 mm (1.2 in) on 15 May 1940.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 432 records.

Record Map

179 stations

179 station records on 15 May 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Watheroo	Australia	Record daily precipitation	29.5 mm (1.2 in)	30 of 100 (Routine)
Uthankarai	India	Record daily precipitation	34.5 mm (1.4 in)	29 of 100 (Routine)
Pennagaram	India	Record daily precipitation	50.5 mm (2.0 in)	29 of 100 (Routine)
Agricultural College	United States	Record high minimum temperature	20.0 C (68.0 F)	27 of 100 (Routine)
Superior	United States	Record daily precipitation	49.0 mm (1.9 in)	26 of 100 (Routine)
Visby_Flygplats	Sweden	Record low minimum temperature	-0.9 C (30.4 F)	23 of 100 (Routine)
Kangayam	India	Record daily precipitation	36.3 mm (1.4 in)	22 of 100 (Routine)
Cedarville	United States	Record high minimum temperature	13.3 C (55.9 F)	22 of 100 (Routine)
Toledo 3N	United States	Record low maximum temperature	7.8 C (46.0 F)	22 of 100 (Routine)
Parry Sound	Canada	Record daily precipitation	29.0 mm (1.1 in)	21 of 100 (Routine)
Makaweli 965	United States	Record high minimum temperature	21.7 C (71.1 F)	21 of 100 (Routine)
Mount Surprise Township	Australia	Record daily precipitation	1.0 mm (0.04 in)	20 of 100 (Routine)
Vilnius	Lithuania	Record daily precipitation	24.0 mm (0.9 in)	20 of 100 (Routine)
Buffelshoek	South Africa	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Cambray	United States	Record daily precipitation	7.9 mm (0.31 in)	20 of 100 (Routine)
Debrecen Airport	Hungary	Record low maximum temperature	7.8 C (46.0 F)	20 of 100 (Routine)
Pinehurst Sthrn Pines	United States	Record high maximum temperature	36.7 C (98.1 F)	20 of 100 (Routine)
Burlington Muni AP	United States	Record low maximum temperature	12.2 C (54.0 F)	20 of 100 (Routine)
Karimganj	India	Record daily precipitation	78.7 mm (3.1 in)	19 of 100 (Routine)
Ramnagar Sr	India	Record daily precipitation	41.9 mm (1.6 in)	19 of 100 (Routine)
Visby_Flygplats	Sweden	Record low maximum temperature	5.3 C (41.5 F)	19 of 100 (Routine)
Karesuando	Sweden	Record high maximum temperature	18.0 C (64.4 F)	19 of 100 (Routine)
Represa	United States	Record high minimum temperature	21.1 C (70.0 F)	19 of 100 (Routine)
Trenton 2	United States	Record high maximum temperature	32.2 C (90.0 F)	19 of 100 (Routine)
Medford	United States	Record daily snowfall	1.3 cm (0.5 in)	19 of 100 (Routine)
Badarpur	India	Record daily precipitation	51.6 mm (2.0 in)	18 of 100 (Routine)
Taylors Falls 1 NE	United States	Record low maximum temperature	6.1 C (43.0 F)	18 of 100 (Routine)
Centre Hall	United States	Record high maximum temperature	32.2 C (90.0 F)	18 of 100 (Routine)
Madison Wb City	United States	Record low minimum temperature	0.6 C (33.1 F)	18 of 100 (Routine)
Martinsburg E W Virginia Rgnl	United States	Record high maximum temperature	35.0 C (95.0 F)	18 of 100 (Routine)
Winslow AP	United States	Record daily precipitation	1.0 mm (0.04 in)	18 of 100 (Routine)
Uttiramerur	India	Record daily precipitation	5.1 mm (0.20 in)	17 of 100 (Routine)
Gyzylarbat	Turkmenistan	Record high maximum temperature	38.6 C (101.5 F)	17 of 100 (Routine)
Birch Tree	United States	Record low minimum temperature	2.8 C (37.0 F)	17 of 100 (Routine)
Steffenville	United States	Record low maximum temperature	13.3 C (55.9 F)	17 of 100 (Routine)
Angelica	United States	Record high maximum temperature	30.0 C (86.0 F)	17 of 100 (Routine)
Coldwater	United States	Record high minimum temperature	18.9 C (66.0 F)	17 of 100 (Routine)
Williamsburg 2 NW	United States	Record high maximum temperature	32.8 C (91.0 F)	17 of 100 (Routine)
Maunawili Rch	United States	Record high maximum temperature	28.9 C (84.0 F)	17 of 100 (Routine)
Hannibal	United States	Record low maximum temperature	10.0 C (50.0 F)	17 of 100 (Routine)
Schreiber	Canada	Record daily precipitation	18.0 mm (0.7 in)	16 of 100 (Routine)
Ariyalur	India	Record daily precipitation	21.3 mm (0.8 in)	16 of 100 (Routine)
Centerville	United States	Record low maximum temperature	10.0 C (50.0 F)	16 of 100 (Routine)
Buffalo	United States	Record high maximum temperature	27.8 C (82.0 F)	16 of 100 (Routine)
Mohonk Lake	United States	Record high maximum temperature	26.7 C (80.1 F)	16 of 100 (Routine)
Oneonta 1 S	United States	Record high maximum temperature	29.4 C (84.9 F)	16 of 100 (Routine)
Honomanu 450	United States	Record high maximum temperature	25.6 C (78.1 F)	16 of 100 (Routine)
Kahuku 912	United States	Record high minimum temperature	23.3 C (73.9 F)	16 of 100 (Routine)
Narkatiyaganj	India	Record daily precipitation	25.4 mm (1.0 in)	15 of 100 (Routine)
Wandiwash	India	Record daily precipitation	5.3 mm (0.21 in)	15 of 100 (Routine)
Falakata Sr	India	Record daily precipitation	90.7 mm (3.6 in)	15 of 100 (Routine)
Basirhat	India	Record daily precipitation	23.1 mm (0.9 in)	15 of 100 (Routine)
Sotchi	Russia	Record low maximum temperature	14.0 C (57.2 F)	15 of 100 (Routine)
Delaware Cy Reedy Poin	United States	Record high maximum temperature	32.2 C (90.0 F)	15 of 100 (Routine)
Bardstown	United States	Record daily precipitation	18.3 mm (0.7 in)	15 of 100 (Routine)
Jeffersonville	United States	Record high maximum temperature	28.3 C (82.9 F)	15 of 100 (Routine)
New Castle 1 N	United States	Record high maximum temperature	31.1 C (88.0 F)	15 of 100 (Routine)
Selinsgrove 2 S	United States	Record high minimum temperature	16.7 C (62.1 F)	15 of 100 (Routine)
Hopewell 1 SE	United States	Record low minimum temperature	-3.3 C (26.1 F)	15 of 100 (Routine)
Ningaloo	Australia	Record daily precipitation	37.6 mm (1.5 in)	14 of 100 (Routine)

Counts by Type and Timescale

179 records

Records set or tied on 15 May 1940 by type: Highest daily maximum 67, Lowest daily maximum 27, Highest daily minimum 26, Lowest daily minimum 16, Heaviest daily rainfall 41, Heaviest daily snowfall 2.

Records on 15 May 1940 by type
Record type	Records
Highest daily maximum	67
Lowest daily maximum	27
Highest daily minimum	26
Lowest daily minimum	16
Heaviest daily rainfall	41
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 15 May 1940 by timescale: all-time 0, monthly 1, daily 178.

How Much Records Were Beaten By

131 broken records

Margins by which the 131 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 35.5. Ties are not counted.

Top 20 by Significance

15 May 1940

Top 20 records on 15 May 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1940	Watheroo, AU	daily rain	29.5 mm (1.2 in)	19.8 mm (0.8 in)	11 years	30 of 100 (Routine)
15 May 1940	Uthankarai, IN	daily rain	34.5 mm (1.4 in)	22.1 mm (0.9 in)	37 years	29 of 100 (Routine)
15 May 1940	Pennagaram, IN	daily rain	50.5 mm (2.0 in)	25.9 mm (1.0 in)	25 years	29 of 100 (Routine)
15 May 1940	Agricultural College, US	daily high min	20.0 C (68.0 F)	4.4 C (7.9 F)	44 years	27 of 100 (Routine)
15 May 1940	Superior, US	daily rain	49.0 mm (1.9 in)	18.3 mm (0.7 in)	24 years	26 of 100 (Routine)
15 May 1940	Visby_Flygplats, SE	daily low min	-0.9 C (30.4 F)	0.9 C (1.6 F)	53 years	23 of 100 (Routine)
15 May 1940	Kangayam, IN	daily rain	36.3 mm (1.4 in)	17.0 mm (0.7 in)	33 years	22 of 100 (Routine)
15 May 1940	Cedarville, US	daily high min	13.3 C (55.9 F)	2.2 C (4.0 F)	44 years	22 of 100 (Routine)
15 May 1940	Toledo 3N, US	daily low max	7.8 C (46.0 F)	3.3 C (5.9 F)	44 years	22 of 100 (Routine)
15 May 1940	Parry Sound, CA	daily rain	29.0 mm (1.1 in)	11.7 mm (0.5 in)	1 year	21 of 100 (Routine)
15 May 1940	Makaweli 965, US	daily high min	21.7 C (71.1 F)	1.1 C (2.0 F)	34 years	21 of 100 (Routine)
15 May 1940	Mount Surprise Township, AU	daily rain	1.0 mm (0.04 in)	1.0 mm (0.04 in)	66 years	20 of 100 (Routine)
15 May 1940	Vilnius, LT	daily rain	24.0 mm (0.9 in)	7.4 mm (0.29 in)	20 years	20 of 100 (Routine)
15 May 1940	Buffelshoek, ZA	daily rain	17.8 mm (0.7 in)	15.8 mm (0.6 in)	29 years	20 of 100 (Routine)
15 May 1940	Cambray, US	daily rain	7.9 mm (0.31 in)	2.8 mm (0.11 in)	37 years	20 of 100 (Routine)
15 May 1940	Debrecen Airport, HU	daily low max	7.8 C (46.0 F)	4.7 C (8.5 F)	21 years	20 of 100 (Routine)
15 May 1940	Pinehurst Sthrn Pines, US	daily high max	36.7 C (98.1 F)	3.4 C (6.1 F)	32 years	20 of 100 (Routine)
15 May 1940	Burlington Muni AP, US	daily low max	12.2 C (54.0 F)	2.8 C (5.0 F)	41 years	20 of 100 (Routine)
15 May 1940	Karimganj, IN	daily rain	78.7 mm (3.1 in)	35.5 mm (1.4 in)	14 years	19 of 100 (Routine)
15 May 1940	Ramnagar Sr, IN	daily rain	41.9 mm (1.6 in)	17.0 mm (0.7 in)	25 years	19 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 1940

Records set or tied on this calendar date in each year from 1820 to 1940. 1940 had 179 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 1940-05-15: 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 5	108
5 to 10	6
10 to 15	6
15 to 20	8
20 to 25	1
25 to 30	1
30 to 35	0
35 to 40	1