Weather Records on 15 May 1964

347 weather records were set or tied worldwide on 15 May 1964. Highest significance: Glomfjord, NO.

Key Facts for 15 May 1964

On 15 May 1964, 347 weather records were set or tied at long-record stations worldwide.
127 were record highs and 141 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 343 daily.
Glomfjord set a daily record precipitation of 41.7 mm (1.6 in) on 15 May 1964.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 431 records.

Record Map

347 stations

347 station records on 15 May 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Glomfjord	Norway	Record daily precipitation	41.7 mm (1.6 in)	55 of 100 (Notable)
Juneau Dwtn	United States	Record daily precipitation	57.7 mm (2.3 in)	55 of 100 (Notable)
Beiarn	Norway	Record daily precipitation	32.2 mm (1.3 in)	53 of 100 (Notable)
Boonville 2 N	United States	Record daily precipitation	61.5 mm (2.4 in)	53 of 100 (Notable)
Fran?A	Brazil	Record daily precipitation	38.0 mm (1.5 in)	47 of 100 (Notable)
El-Ton	Russia	Record daily precipitation	42.2 mm (1.7 in)	47 of 100 (Notable)
Petropavlovsk-Kamchatskij	Russia	Record high maximum temperature	18.7 C (65.7 F)	45 of 100 (Notable)
Sta. Cruz de Tenerife	Spain	Record high maximum temperature	33.2 C (91.8 F)	44 of 100 (Notable)
Luroy	Norway	Record daily precipitation	68.4 mm (2.7 in)	42 of 100 (Notable)
Kapskarmo	Norway	Record daily precipitation	25.5 mm (1.0 in)	42 of 100 (Notable)
Drevja	Norway	Record daily precipitation	30.5 mm (1.2 in)	41 of 100 (Notable)
Petropavlovskij Majak	Russia	Record high minimum temperature	6.2 C (43.2 F)	41 of 100 (Notable)
New Hampton	United States	Record daily precipitation	58.9 mm (2.3 in)	41 of 100 (Notable)
Acude Cedro	Brazil	Record daily precipitation	68.0 mm (2.7 in)	40 of 100 (Notable)
Petropavlovskij Majak	Russia	Record high maximum temperature	17.2 C (63.0 F)	40 of 100 (Notable)
Petropavlovsk-Kamchatskij	Russia	Record high minimum temperature	5.9 C (42.6 F)	39 of 100 (Notable)
Yellowstone Park Mammoth	United States	Record high minimum temperature	10.0 C (50.0 F)	39 of 100 (Notable)
Minsk	Belarus	Record daily precipitation	25.9 mm (1.0 in)	37 of 100 (Notable)
Virudhunagar	India	Record daily precipitation	83.8 mm (3.3 in)	37 of 100 (Notable)
Ballia	India	Record daily precipitation	27.7 mm (1.1 in)	35 of 100 (Notable)
Tapera	Brazil	Record daily precipitation	50.7 mm (2.0 in)	34 of 100 (Routine)
Kljuchi	Russia	Record high maximum temperature	28.4 C (83.1 F)	34 of 100 (Routine)
Coupeville 1 S	United States	Record low minimum temperature	0.0 C (32.0 F)	34 of 100 (Routine)
Marquette	United States	Record high minimum temperature	13.3 C (55.9 F)	34 of 100 (Routine)
Coimbra	Portugal	Record high maximum temperature	38.0 C (100.4 F)	32 of 100 (Routine)
Sta. Cruz de Tenerife	Spain	Record high minimum temperature	22.0 C (71.6 F)	31 of 100 (Routine)
Timovskoe	Russia	Record high minimum temperature	11.1 C (52.0 F)	30 of 100 (Routine)
Castle Rock	United States	Record high maximum temperature	29.4 C (84.9 F)	30 of 100 (Routine)
Pilot Rock 1 SE	United States	Record low minimum temperature	-2.2 C (28.0 F)	30 of 100 (Routine)
Cheyyar	India	Record daily precipitation	43.6 mm (1.7 in)	29 of 100 (Routine)
Soledad de Doblado	Mexico	Record low minimum temperature	13.3 C (55.9 F)	29 of 100 (Routine)
Manati 2 E	Puerto Rico [United States]	Record high maximum temperature	35.6 C (96.1 F)	29 of 100 (Routine)
Winkelman 6 S	United States	Record high maximum temperature	37.8 C (100.0 F)	29 of 100 (Routine)
Beloit	United States	Record high maximum temperature	33.3 C (91.9 F)	29 of 100 (Routine)
Cowichan Bay Cherry Point	Canada	Record low minimum temperature	0.0 C (32.0 F)	28 of 100 (Routine)
Chita	Russia	Record low minimum temperature	-7.1 C (19.2 F)	28 of 100 (Routine)
Rocky Ford 2 SE	United States	Record high maximum temperature	34.4 C (93.9 F)	28 of 100 (Routine)
Ft Lauderdale	United States	Record daily precipitation	61.0 mm (2.4 in)	28 of 100 (Routine)
Ellensburg	United States	Record low minimum temperature	-3.3 C (26.1 F)	28 of 100 (Routine)
Mamanguape	Brazil	Record daily precipitation	83.7 mm (3.3 in)	27 of 100 (Routine)
Britannia Beach Furry Cr	Canada	Record low minimum temperature	0.0 C (32.0 F)	27 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record high maximum temperature	24.8 C (76.6 F)	27 of 100 (Routine)
Juneau Dwtn	United States	Record low maximum temperature	4.4 C (39.9 F)	27 of 100 (Routine)
South Pass City	United States	Record high maximum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Agassiz Cda	Canada	Record low minimum temperature	0.6 C (33.1 F)	25 of 100 (Routine)
Kljuchi	Russia	Record high minimum temperature	7.1 C (44.8 F)	25 of 100 (Routine)
Olga 2 SE	United States	Record low minimum temperature	2.2 C (36.0 F)	25 of 100 (Routine)
Amarpara	India	Record daily precipitation	56.6 mm (2.2 in)	24 of 100 (Routine)
Ahwa	India	Record daily precipitation	32.9 mm (1.3 in)	24 of 100 (Routine)
Nord-Rana	Norway	Record daily precipitation	26.4 mm (1.0 in)	24 of 100 (Routine)
Hugoton	United States	Record high maximum temperature	33.3 C (91.9 F)	24 of 100 (Routine)
Batalha	Brazil	Record daily precipitation	78.1 mm (3.1 in)	23 of 100 (Routine)
Kentfield	United States	Record low minimum temperature	2.8 C (37.0 F)	23 of 100 (Routine)
Winthrop UNIV	United States	Record low maximum temperature	20.0 C (68.0 F)	23 of 100 (Routine)
Almaty	Kazakhstan	Record low maximum temperature	7.2 C (45.0 F)	22 of 100 (Routine)
Turkestan	Kazakhstan	Record low minimum temperature	4.2 C (39.6 F)	22 of 100 (Routine)
Lugano	Switzerland	Record high minimum temperature	17.2 C (63.0 F)	22 of 100 (Routine)
Bonners Ferry	United States	Record low minimum temperature	-1.1 C (30.0 F)	22 of 100 (Routine)
Eagle Nest	United States	Record low minimum temperature	-10.6 C (12.9 F)	22 of 100 (Routine)
Canastota	United States	Record daily precipitation	34.3 mm (1.4 in)	22 of 100 (Routine)

Counts by Type and Timescale

347 records

Records set or tied on 15 May 1964 by type: Highest daily maximum 86, Lowest daily maximum 38, Highest daily minimum 41, Lowest daily minimum 103, Heaviest daily rainfall 79.

Records on 15 May 1964 by type
Record type	Records
Highest daily maximum	86
Lowest daily maximum	38
Highest daily minimum	41
Lowest daily minimum	103
Heaviest daily rainfall	79
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 May 1964 by timescale: all-time 0, monthly 4, daily 343.

How Much Records Were Beaten By

247 broken records

Margins by which the 247 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 43.2. Ties are not counted.

Top 20 by Significance

15 May 1964

Top 20 records on 15 May 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1964	Glomfjord, NO	daily rain	41.7 mm (1.6 in)	28.4 mm (1.1 in)	38 years	55 of 100 (Notable)
15 May 1964	Juneau Dwtn, US	daily rain	57.7 mm (2.3 in)	26.5 mm (1.0 in)	50 years	55 of 100 (Notable)
15 May 1964	Beiarn, NO	daily rain	32.2 mm (1.3 in)	16.9 mm (0.7 in)	50 years	53 of 100 (Notable)
15 May 1964	Boonville 2 N, US	daily rain	61.5 mm (2.4 in)	35.6 mm (1.4 in)	27 years	53 of 100 (Notable)
15 May 1964	Fran?A, BR	monthly rain	38.0 mm (1.5 in)	14.8 mm (0.6 in)	5 years	47 of 100 (Notable)
15 May 1964	El-Ton, RU	daily rain	42.2 mm (1.7 in)	34.8 mm (1.4 in)	8 years	47 of 100 (Notable)
15 May 1964	Petropavlovsk-Kamchatskij, RU	daily high max	18.7 C (65.7 F)	7.8 C (14.0 F)	54 years	45 of 100 (Notable)
15 May 1964	Sta. Cruz de Tenerife, ES	daily high max	33.2 C (91.8 F)	6.4 C (11.5 F)	33 years	44 of 100 (Notable)
15 May 1964	Luroy, NO	daily rain	68.4 mm (2.7 in)	38.5 mm (1.5 in)	8 years	42 of 100 (Notable)
15 May 1964	Kapskarmo, NO	daily rain	25.5 mm (1.0 in)	11.6 mm (0.5 in)	50 years	42 of 100 (Notable)
15 May 1964	Drevja, NO	daily rain	30.5 mm (1.2 in)	12.0 mm (0.5 in)	50 years	41 of 100 (Notable)
15 May 1964	Petropavlovskij Majak, RU	daily high min	6.2 C (43.2 F)	2.8 C (5.0 F)	68 years	41 of 100 (Notable)
15 May 1964	New Hampton, US	daily rain	58.9 mm (2.3 in)	22.1 mm (0.9 in)	55 years	41 of 100 (Notable)
15 May 1964	Acude Cedro, BR	daily rain	68.0 mm (2.7 in)	33.0 mm (1.3 in)	44 years	40 of 100 (Notable)
15 May 1964	Petropavlovskij Majak, RU	daily high max	17.2 C (63.0 F)	6.3 C (11.3 F)	54 years	40 of 100 (Notable)
15 May 1964	Petropavlovsk-Kamchatskij, RU	daily high min	5.9 C (42.6 F)	2.5 C (4.5 F)	68 years	39 of 100 (Notable)
15 May 1964	Yellowstone Park Mammoth, US	daily high min	10.0 C (50.0 F)	4.4 C (7.9 F)	66 years	39 of 100 (Notable)
15 May 1964	Minsk, BY	daily rain	25.9 mm (1.0 in)	8.4 mm (0.33 in)	58 years	37 of 100 (Notable)
15 May 1964	Virudhunagar, IN	daily rain	83.8 mm (3.3 in)	42.4 mm (1.7 in)	31 years	37 of 100 (Notable)
15 May 1964	Ballia, IN	daily rain	27.7 mm (1.1 in)	15.8 mm (0.6 in)	51 years	35 of 100 (Notable)

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 1964

Records set or tied on this calendar date in each year from 1820 to 1964. 1964 had 347 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 1964-05-15: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 10	217
10 to 20	18
20 to 30	4
30 to 40	5
40 to 50	3