Weather Records on 15 May 1975

372 weather records were set or tied worldwide on 15 May 1975. Highest significance: Fairview, CA.

Key Facts for 15 May 1975

On 15 May 1975, 372 weather records were set or tied at long-record stations worldwide.
174 were record highs and 49 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 371 daily.
Fairview set a daily record snowfall of 7.1 cm (2.8 in) on 15 May 1975.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 431 records.

Record Map

372 stations

372 station records on 15 May 1975 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Fairview	Canada	Record daily snowfall	7.1 cm (2.8 in)	53 of 100 (Notable)
Uppsala_Aut	Sweden	Record high maximum temperature	24.8 C (76.6 F)	44 of 100 (Notable)
Dialville 2 W	United States	Record daily precipitation	114.3 mm (4.5 in)	41 of 100 (Notable)
St Hyacinthe	Canada	Record daily precipitation	36.1 mm (1.4 in)	36 of 100 (Notable)
Visby_Flygplats	Sweden	Record high maximum temperature	25.0 C (77.0 F)	35 of 100 (Notable)
Allende (Smn)	Mexico	Record low minimum temperature	8.9 C (48.0 F)	34 of 100 (Routine)
Tartu-Toravere	Estonia	Record high maximum temperature	28.5 C (83.3 F)	33 of 100 (Routine)
Highlands	United States	Record daily precipitation	71.9 mm (2.8 in)	33 of 100 (Routine)
Palmetto	United States	Record daily precipitation	46.7 mm (1.8 in)	33 of 100 (Routine)
Moyale	Kenya	Record daily precipitation	47.2 mm (1.9 in)	32 of 100 (Routine)
Velikie Luki	Russia	Record high maximum temperature	27.5 C (81.5 F)	32 of 100 (Routine)
Keams Canyon	United States	Record high maximum temperature	29.4 C (84.9 F)	32 of 100 (Routine)
Greenwood	United States	Record daily precipitation	69.9 mm (2.8 in)	32 of 100 (Routine)
Mt Holly 4 NE	United States	Record daily precipitation	87.6 mm (3.4 in)	32 of 100 (Routine)
Bolivar Wtr Wks	United States	Record daily precipitation	43.2 mm (1.7 in)	32 of 100 (Routine)
Acude Varzea da Volta	Brazil	Record daily precipitation	55.2 mm (2.2 in)	31 of 100 (Routine)
Palhano	Brazil	Record daily precipitation	46.3 mm (1.8 in)	31 of 100 (Routine)
Cherdyn'	Russia	Record high minimum temperature	14.3 C (57.7 F)	31 of 100 (Routine)
Alta 1 NNW	United States	Record snow depth	35.6 cm (14.0 in)	31 of 100 (Routine)
Jacksonville NAS	United States	Record daily precipitation	64.0 mm (2.5 in)	31 of 100 (Routine)
Holzhausen A.D. Haide	Germany	Record daily precipitation	31.8 mm (1.3 in)	30 of 100 (Routine)
Scott	United States	Record daily precipitation	64.0 mm (2.5 in)	30 of 100 (Routine)
Cascade 5 S	United States	Record high minimum temperature	12.2 C (54.0 F)	30 of 100 (Routine)
Morgantown Muni AP	United States	Record daily precipitation	32.8 mm (1.3 in)	30 of 100 (Routine)
Natashquan A	Canada	Record high maximum temperature	17.2 C (63.0 F)	29 of 100 (Routine)
Birni N'Konni	Niger	Record low maximum temperature	29.9 C (85.8 F)	29 of 100 (Routine)
Stockholm	Sweden	Record high maximum temperature	24.0 C (75.2 F)	29 of 100 (Routine)
Mammoth Cave	United States	Record daily precipitation	50.8 mm (2.0 in)	29 of 100 (Routine)
Luna Rs	United States	Record high maximum temperature	30.6 C (87.1 F)	29 of 100 (Routine)
St Lin des Laurentides	Canada	Record daily precipitation	25.9 mm (1.0 in)	28 of 100 (Routine)
Jakutsk	Russia	Record high minimum temperature	5.8 C (42.4 F)	28 of 100 (Routine)
Kazan	Russia	Record high minimum temperature	16.1 C (61.0 F)	28 of 100 (Routine)
Fordyce	United States	Record daily precipitation	34.5 mm (1.4 in)	28 of 100 (Routine)
New Albany	United States	Record daily precipitation	53.1 mm (2.1 in)	28 of 100 (Routine)
Blackleaf	United States	Record high minimum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Middlebourne 3 ESE	United States	Record daily precipitation	33.8 mm (1.3 in)	27 of 100 (Routine)
Rio Formoso	Brazil	Record daily precipitation	75.0 mm (3.0 in)	26 of 100 (Routine)
Canton 4N	United States	Record daily precipitation	62.2 mm (2.4 in)	26 of 100 (Routine)
Chaval	Brazil	Record daily precipitation	56.3 mm (2.2 in)	24 of 100 (Routine)
Tallinn	Estonia	Record high maximum temperature	28.2 C (82.8 F)	24 of 100 (Routine)
Andalusia 3 W	United States	Record daily precipitation	43.2 mm (1.7 in)	24 of 100 (Routine)
Vasilevici	Belarus	Record high minimum temperature	15.0 C (59.0 F)	23 of 100 (Routine)
Tallinn	Estonia	Record high maximum temperature	28.2 C (82.8 F)	23 of 100 (Routine)
Stevensville	United States	Record high minimum temperature	11.7 C (53.1 F)	23 of 100 (Routine)
Mc Minnville	United States	Record daily precipitation	31.5 mm (1.2 in)	23 of 100 (Routine)
McKinney Muni AP	United States	Record daily precipitation	38.6 mm (1.5 in)	23 of 100 (Routine)
San Ildelfonso Villa Alta	Mexico	Record high maximum temperature	37.8 C (100.0 F)	22 of 100 (Routine)
Gogland	Russia	Record high maximum temperature	22.5 C (72.5 F)	22 of 100 (Routine)
Selmer	United States	Record daily precipitation	66.3 mm (2.6 in)	22 of 100 (Routine)
St. Petersburg	Russia	Record high maximum temperature	27.0 C (80.6 F)	21 of 100 (Routine)
Kharkiv	Ukraine	Record high minimum temperature	17.4 C (63.3 F)	21 of 100 (Routine)
Salisbury	United States	Record daily precipitation	38.1 mm (1.5 in)	21 of 100 (Routine)
Fort Huachuca	United States	Record high maximum temperature	33.3 C (91.9 F)	21 of 100 (Routine)
Limassol	Cyprus	Record daily precipitation	13.6 mm (0.5 in)	20 of 100 (Routine)
Flin Flon	Canada	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Nanuque-Montante	Brazil	Record daily precipitation	24.0 mm (0.9 in)	20 of 100 (Routine)
Khorog	Tajikistan	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Oka	Canada	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Rennes-St Jacques	France	Record daily precipitation	13.0 mm (0.5 in)	20 of 100 (Routine)
Berezovo	Russia	Record daily precipitation	15.9 mm (0.6 in)	20 of 100 (Routine)

Counts by Type and Timescale

372 records

Records set or tied on 15 May 1975 by type: Highest daily maximum 84, Lowest daily maximum 35, Highest daily minimum 90, Lowest daily minimum 14, Heaviest daily rainfall 141, Heaviest daily snowfall 5, Deepest snow cover 3.

Records on 15 May 1975 by type
Record type	Records
Highest daily maximum	84
Lowest daily maximum	35
Highest daily minimum	90
Lowest daily minimum	14
Heaviest daily rainfall	141
Heaviest daily snowfall	5
Deepest snow cover	3

Records on 15 May 1975 by timescale: all-time 0, monthly 1, daily 371.

How Much Records Were Beaten By

301 broken records

Margins by which the 301 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 305.0. Ties are not counted.

Top 20 by Significance

15 May 1975

Top 20 records on 15 May 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1975	Fairview, CA	daily snowfall	7.1 cm (2.8 in)	7.1 cm (2.8 in)	42 years	53 of 100 (Notable)
15 May 1975	Uppsala_Aut, SE	daily high max	24.8 C (76.6 F)	2.5 C (4.5 F)	118 years	44 of 100 (Notable)
15 May 1975	Dialville 2 W, US	daily rain	114.3 mm (4.5 in)	45.7 mm (1.8 in)	42 years	41 of 100 (Notable)
15 May 1975	St Hyacinthe, CA	daily rain	36.1 mm (1.4 in)	16.3 mm (0.6 in)	14 years	36 of 100 (Notable)
15 May 1975	Visby_Flygplats, SE	daily high max	25.0 C (77.0 F)	1.0 C (1.8 F)	80 years	35 of 100 (Notable)
15 May 1975	Allende (Smn), MX	daily low min	8.9 C (48.0 F)	2.8 C (5.0 F)	66 years	34 of 100 (Routine)
15 May 1975	Tartu-Toravere, EE	daily high max	28.5 C (83.3 F)	3.9 C (7.0 F)	64 years	33 of 100 (Routine)
15 May 1975	Highlands, US	daily rain	71.9 mm (2.8 in)	21.4 mm (0.8 in)	40 years	33 of 100 (Routine)
15 May 1975	Palmetto, US	daily rain	46.7 mm (1.8 in)	2.5 mm (0.10 in)	81 years	33 of 100 (Routine)
15 May 1975	Moyale, KE	daily rain	47.2 mm (1.9 in)	25.6 mm (1.0 in)	36 years	32 of 100 (Routine)
15 May 1975	Velikie Luki, RU	daily high max	27.5 C (81.5 F)	0.5 C (0.9 F)	77 years	32 of 100 (Routine)
15 May 1975	Keams Canyon, US	daily high max	29.4 C (84.9 F)	0.5 C (0.9 F)	79 years	32 of 100 (Routine)
15 May 1975	Greenwood, US	daily rain	69.9 mm (2.8 in)	30.3 mm (1.2 in)	32 years	32 of 100 (Routine)
15 May 1975	Mt Holly 4 NE, US	daily rain	87.6 mm (3.4 in)	33.0 mm (1.3 in)	4 years	32 of 100 (Routine)
15 May 1975	Bolivar Wtr Wks, US	daily rain	43.2 mm (1.7 in)	0.8 mm (0.03 in)	81 years	32 of 100 (Routine)
15 May 1975	Acude Varzea da Volta, BR	daily rain	55.2 mm (2.2 in)	21.3 mm (0.8 in)	40 years	31 of 100 (Routine)
15 May 1975	Palhano, BR	daily rain	46.3 mm (1.8 in)	30.7 mm (1.2 in)	8 years	31 of 100 (Routine)
15 May 1975	Cherdyn', RU	daily high min	14.3 C (57.7 F)	2.7 C (4.9 F)	60 years	31 of 100 (Routine)
15 May 1975	Alta 1 NNW, US	daily snow depth	35.6 cm (14.0 in)	30.5 cm (12.0 in)	20 years	31 of 100 (Routine)
15 May 1975	Jacksonville NAS, US	daily rain	64.0 mm (2.5 in)	34.0 mm (1.3 in)	24 years	31 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 1975

Records set or tied on this calendar date in each year from 1820 to 1975. 1975 had 372 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 1975-05-15: 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 50	297
50 to 100	2
100 to 150	0
150 to 200	1
200 to 250	0
250 to 300	0
300 to 350	1