Weather Records on 15 May 1955

538 weather records were set or tied worldwide on 15 May 1955. Highest significance: Lima, US.

Key Facts for 15 May 1955

On 15 May 1955, 538 weather records were set or tied at long-record stations worldwide.
97 were record highs and 294 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 524 daily.
Lima set a daily record snowfall of 30.5 cm (12.0 in) on 15 May 1955.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 430 records.

Record Map

538 stations

538 station records on 15 May 1955 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1955: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lima	United States	Record daily snowfall	30.5 cm (12.0 in)	61 of 100 (Major)
Gleichen	Canada	Record daily snowfall	18.3 cm (7.2 in)	56 of 100 (Notable)
Beaver Mines	Canada	Record daily snowfall	33.0 cm (13.0 in)	56 of 100 (Notable)
Sugar City	United States	Record daily precipitation	31.8 mm (1.3 in)	52 of 100 (Notable)
Caldwell	Canada	Record daily snowfall	35.6 cm (14.0 in)	49 of 100 (Notable)
Mountain View Birdseye	Canada	Record daily snowfall	25.4 cm (10.0 in)	47 of 100 (Notable)
American Falls 6 NE	United States	Record daily snowfall	7.6 cm (3.0 in)	44 of 100 (Notable)
Sugar City	United States	Record daily snowfall	12.7 cm (5.0 in)	43 of 100 (Notable)
Calgary Int'l A	Canada	Record daily snowfall	12.7 cm (5.0 in)	42 of 100 (Notable)
Blair	United States	Record daily precipitation	55.9 mm (2.2 in)	42 of 100 (Notable)
Pekisko	Canada	Record daily snowfall	20.3 cm (8.0 in)	41 of 100 (Notable)
Vulcan	Canada	Record daily snowfall	13.7 cm (5.4 in)	40 of 100 (Notable)
Ljubljana Bezigrad	Slovenia	Record daily precipitation	54.1 mm (2.1 in)	39 of 100 (Notable)
Claresholm Meadow Creek	Canada	Record daily precipitation	33.0 mm (1.3 in)	36 of 100 (Notable)
Valier	United States	Record daily snowfall	10.2 cm (4.0 in)	36 of 100 (Notable)
Beaver Mines	Canada	Record daily precipitation	33.0 mm (1.3 in)	35 of 100 (Notable)
Ashton 1N	United States	Record daily snowfall	7.6 cm (3.0 in)	35 of 100 (Notable)
Dillon U of Montana Western	United States	Record daily precipitation	29.0 mm (1.1 in)	35 of 100 (Notable)
Cape May 2 NW	United States	Record low minimum temperature	4.4 C (39.9 F)	35 of 100 (Notable)
Deseret	United States	Record daily snowfall	7.6 cm (3.0 in)	35 of 100 (Notable)
Atlanta 1 E	United States	Record daily snowfall	5.3 cm (2.1 in)	34 of 100 (Routine)
Eureka	United States	Record low minimum temperature	-11.1 C (12.0 F)	34 of 100 (Routine)
Cardston	Canada	Record daily snowfall	22.1 cm (8.7 in)	33 of 100 (Routine)
Blackfoot Fire Dept	United States	Record daily snowfall	5.1 cm (2.0 in)	33 of 100 (Routine)
Morganton	United States	Record daily precipitation	67.1 mm (2.6 in)	33 of 100 (Routine)
Namdalseid	Norway	Record snow depth	20.0 cm (7.9 in)	31 of 100 (Routine)
Stensele	Sweden	Record snow depth	40.0 cm (15.7 in)	31 of 100 (Routine)
Midvale	United States	Record daily snowfall	7.6 cm (3.0 in)	31 of 100 (Routine)
Nacogdoches	United States	Record high maximum temperature	35.0 C (95.0 F)	30 of 100 (Routine)
Stornoway Airport	United Kingdom	Record low minimum temperature	-2.2 C (28.0 F)	29 of 100 (Routine)
Huntington	United States	Record low maximum temperature	10.6 C (51.1 F)	29 of 100 (Routine)
Gleichen	Canada	Record low maximum temperature	2.2 C (36.0 F)	28 of 100 (Routine)
Emmett 2 E	United States	Record low maximum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
New Meadows Rs	United States	Record low maximum temperature	2.8 C (37.0 F)	28 of 100 (Routine)
Sugar City	United States	Record low maximum temperature	4.4 C (39.9 F)	28 of 100 (Routine)
Hebgen Dam	United States	Record daily snowfall	5.1 cm (2.0 in)	28 of 100 (Routine)
McGill	United States	Record low maximum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Albany 1 N	United States	Record low maximum temperature	10.0 C (50.0 F)	28 of 100 (Routine)
Deseret	United States	Record low maximum temperature	9.4 C (48.9 F)	28 of 100 (Routine)
Pomeroy	United States	Record low maximum temperature	7.2 C (45.0 F)	28 of 100 (Routine)
Sedgwick	United States	Record daily precipitation	34.3 mm (1.4 in)	27 of 100 (Routine)
Payette	United States	Record low maximum temperature	11.1 C (52.0 F)	27 of 100 (Routine)
Richfield	United States	Record low maximum temperature	6.1 C (43.0 F)	27 of 100 (Routine)
Ochoco Rs	United States	Record daily snowfall	5.1 cm (2.0 in)	27 of 100 (Routine)
Truxton Canyon	United States	Record low minimum temperature	0.6 C (33.1 F)	26 of 100 (Routine)
Blackfoot Fire Dept	United States	Record low maximum temperature	6.1 C (43.0 F)	26 of 100 (Routine)
Caldwell	United States	Record low maximum temperature	11.7 C (53.1 F)	26 of 100 (Routine)
Grace	United States	Record low maximum temperature	3.9 C (39.0 F)	26 of 100 (Routine)
Grangeville	United States	Record low maximum temperature	6.1 C (43.0 F)	26 of 100 (Routine)
Idaho City	United States	Record low maximum temperature	5.0 C (41.0 F)	26 of 100 (Routine)
Shoshone 1 WNW	United States	Record low maximum temperature	7.8 C (46.0 F)	26 of 100 (Routine)
Holter Dam	United States	Record low maximum temperature	2.2 C (36.0 F)	26 of 100 (Routine)
Jamestown State Hosp	United States	Record high minimum temperature	14.4 C (57.9 F)	26 of 100 (Routine)
Pendleton Dwtn	United States	Record low maximum temperature	11.7 C (53.1 F)	26 of 100 (Routine)
Mountain View Birdseye	Canada	Record daily precipitation	25.4 mm (1.0 in)	25 of 100 (Routine)
Cedaredge	United States	Record high minimum temperature	11.7 C (53.1 F)	25 of 100 (Routine)
Cambridge	United States	Record low maximum temperature	9.4 C (48.9 F)	25 of 100 (Routine)
Hamilton	United States	Record low maximum temperature	7.2 C (45.0 F)	25 of 100 (Routine)
Eureka	United States	Record low maximum temperature	4.4 C (39.9 F)	25 of 100 (Routine)
Ellendale	United States	Record high minimum temperature	15.0 C (59.0 F)	25 of 100 (Routine)

Counts by Type and Timescale

538 records

Records set or tied on 15 May 1955 by type: Highest daily maximum 26, Lowest daily maximum 221, Highest daily minimum 71, Lowest daily minimum 73, Heaviest daily rainfall 99, Heaviest daily snowfall 36, Deepest snow cover 12.

Records on 15 May 1955 by type
Record type	Records
Highest daily maximum	26
Lowest daily maximum	221
Highest daily minimum	71
Lowest daily minimum	73
Heaviest daily rainfall	99
Heaviest daily snowfall	36
Deepest snow cover	12

Records on 15 May 1955 by timescale: all-time 0, monthly 14, daily 524.

How Much Records Were Beaten By

445 broken records

Margins by which the 445 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 330.0. Ties are not counted.

Top 20 by Significance

15 May 1955

Top 20 records on 15 May 1955 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1955	Lima, US	daily snowfall	30.5 cm (12.0 in)	30.5 cm (12.0 in)	55 years	61 of 100 (Major)
15 May 1955	Gleichen, CA	daily snowfall	18.3 cm (7.2 in)	18.3 cm (7.2 in)	52 years	56 of 100 (Notable)
15 May 1955	Beaver Mines, CA	daily snowfall	33.0 cm (13.0 in)	33.0 cm (13.0 in)	41 years	56 of 100 (Notable)
15 May 1955	Sugar City, US	daily rain	31.8 mm (1.3 in)	26.2 mm (1.0 in)	29 years	52 of 100 (Notable)
15 May 1955	Caldwell, CA	daily snowfall	35.6 cm (14.0 in)	25.4 cm (10.0 in)	41 years	49 of 100 (Notable)
15 May 1955	Mountain View Birdseye, CA	daily snowfall	25.4 cm (10.0 in)	25.4 cm (10.0 in)	37 years	47 of 100 (Notable)
15 May 1955	American Falls 6 NE, US	monthly snowfall	7.6 cm (3.0 in)	5.1 cm (2.0 in)	61 years	44 of 100 (Notable)
15 May 1955	Sugar City, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	46 years	43 of 100 (Notable)
15 May 1955	Calgary Int'l A, CA	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	69 years	42 of 100 (Notable)
15 May 1955	Blair, US	daily rain	55.9 mm (2.2 in)	42.2 mm (1.7 in)	8 years	42 of 100 (Notable)
15 May 1955	Pekisko, CA	daily snowfall	20.3 cm (8.0 in)	18.5 cm (7.3 in)	40 years	41 of 100 (Notable)
15 May 1955	Vulcan, CA	daily snowfall	13.7 cm (5.4 in)	13.7 cm (5.4 in)	33 years	40 of 100 (Notable)
15 May 1955	Ljubljana Bezigrad, SI	daily rain	54.1 mm (2.1 in)	30.1 mm (1.2 in)	4 years	39 of 100 (Notable)
15 May 1955	Claresholm Meadow Creek, CA	daily rain	33.0 mm (1.3 in)	15.2 mm (0.6 in)	37 years	36 of 100 (Notable)
15 May 1955	Valier, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	42 years	36 of 100 (Notable)
15 May 1955	Beaver Mines, CA	daily rain	33.0 mm (1.3 in)	26.1 mm (1.0 in)	37 years	35 of 100 (Notable)
15 May 1955	Ashton 1N, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	52 years	35 of 100 (Notable)
15 May 1955	Dillon U of Montana Western, US	daily rain	29.0 mm (1.1 in)	13.5 mm (0.5 in)	33 years	35 of 100 (Notable)
15 May 1955	Cape May 2 NW, US	daily low min	4.4 C (39.9 F)	1.7 C (3.1 F)	76 years	35 of 100 (Notable)
15 May 1955	Deseret, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	48 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 1955

Records set or tied on this calendar date in each year from 1820 to 1955. 1955 had 538 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 1955-05-15: 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	416
50 to 100	14
100 to 150	6
150 to 200	3
200 to 250	2
250 to 300	2
300 to 350	2