Weather Records on 15 May 1951

736 weather records were set or tied worldwide on 15 May 1951. Highest significance: Holly, US.

Key Facts for 15 May 1951

On 15 May 1951, 736 weather records were set or tied at long-record stations worldwide.
217 were record highs and 124 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 19 monthly and 715 daily.
Holly set an all-time record daily precipitation of 118.1 mm (4.6 in) on 15 May 1951.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 429 records.

Record Map

736 stations

736 station records on 15 May 1951 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1951: highest significance records shown on the map
Station	Country	Type	Value	Significance
Holly	United States	Record daily precipitation	118.1 mm (4.6 in)	71 of 100 (Major)
Two Buttes	United States	Record daily precipitation	167.6 mm (6.6 in)	67 of 100 (Major)
Springfield	United States	Record daily precipitation	137.2 mm (5.4 in)	58 of 100 (Notable)
Rooiberg	South Africa	Record daily precipitation	37.1 mm (1.5 in)	56 of 100 (Notable)
Jhb-Braamfontein (Cem)	South Africa	Record daily precipitation	50.3 mm (2.0 in)	51 of 100 (Notable)
Jhb-Joubert Park	South Africa	Record daily precipitation	49.5 mm (1.9 in)	51 of 100 (Notable)
Atkinson 3SW	United States	Record daily precipitation	69.6 mm (2.7 in)	51 of 100 (Notable)
Wauneta	United States	Record daily precipitation	76.7 mm (3.0 in)	51 of 100 (Notable)
Industria	South Africa	Record daily precipitation	43.2 mm (1.7 in)	50 of 100 (Notable)
Jhb-Vrededorp	South Africa	Record daily precipitation	41.9 mm (1.6 in)	50 of 100 (Notable)
Saint Francis	United States	Record daily precipitation	97.3 mm (3.8 in)	50 of 100 (Notable)
Jhb-Zoological Garden	South Africa	Record daily precipitation	48.5 mm (1.9 in)	49 of 100 (Notable)
Springkell	South Africa	Record daily precipitation	47.0 mm (1.9 in)	49 of 100 (Notable)
Potgietersrus	South Africa	Record daily precipitation	27.7 mm (1.1 in)	49 of 100 (Notable)
Syracuse 1NE	United States	Record daily precipitation	93.0 mm (3.7 in)	49 of 100 (Notable)
Springbok	South Africa	Record daily precipitation	38.9 mm (1.5 in)	48 of 100 (Notable)
Leeupoort	South Africa	Record daily precipitation	40.1 mm (1.6 in)	48 of 100 (Notable)
Newport	United States	Record daily precipitation	47.0 mm (1.9 in)	48 of 100 (Notable)
Heidelberg I	South Africa	Record daily precipitation	49.8 mm (2.0 in)	47 of 100 (Notable)
Roodekuil	South Africa	Record daily precipitation	34.8 mm (1.4 in)	47 of 100 (Notable)
Dartmoor	Australia	Record daily precipitation	30.0 mm (1.2 in)	46 of 100 (Notable)
Rietfontein	South Africa	Record daily precipitation	41.7 mm (1.6 in)	46 of 100 (Notable)
Roodepoort (Mun)	South Africa	Record daily precipitation	52.1 mm (2.1 in)	46 of 100 (Notable)
Valmora	United States	Record daily precipitation	57.7 mm (2.3 in)	46 of 100 (Notable)
Monte Santo	Brazil	Record daily precipitation	42.0 mm (1.7 in)	45 of 100 (Notable)
Setlagodi (Pol)	South Africa	Record daily precipitation	29.2 mm (1.1 in)	43 of 100 (Notable)
Randfontein (Gm)	South Africa	Record daily precipitation	45.0 mm (1.8 in)	43 of 100 (Notable)
Krugersdorp	South Africa	Record daily precipitation	42.2 mm (1.7 in)	43 of 100 (Notable)
Durban Roodepoort Deep Gm	South Africa	Record daily precipitation	52.8 mm (2.1 in)	43 of 100 (Notable)
Welbedacht Agric Office	South Africa	Record daily precipitation	31.5 mm (1.2 in)	43 of 100 (Notable)
Wray	United States	Record daily precipitation	90.4 mm (3.6 in)	43 of 100 (Notable)
Weltevrede	South Africa	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Klipspruit (Pur)	South Africa	Record daily precipitation	40.9 mm (1.6 in)	42 of 100 (Notable)
Germiston-Fj Payne Park	South Africa	Record daily precipitation	48.0 mm (1.9 in)	41 of 100 (Notable)
Donkerhoek-Rainhill	South Africa	Record daily precipitation	47.2 mm (1.9 in)	41 of 100 (Notable)
Pretoria-Burgerspark	South Africa	Record daily precipitation	48.8 mm (1.9 in)	41 of 100 (Notable)
Granite Reef Dam	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Flandreau	United States	Record daily precipitation	53.3 mm (2.1 in)	41 of 100 (Notable)
Roodekop	South Africa	Record daily precipitation	45.7 mm (1.8 in)	40 of 100 (Notable)
Tomahawk Spirit Rsvr	United States	Record daily precipitation	36.1 mm (1.4 in)	40 of 100 (Notable)
Kollegal	India	Record daily precipitation	56.1 mm (2.2 in)	39 of 100 (Notable)
Kenton	United States	Record daily precipitation	57.2 mm (2.3 in)	39 of 100 (Notable)
Kamiesberg	South Africa	Record daily precipitation	37.6 mm (1.5 in)	38 of 100 (Notable)
Balfour (Mag)	South Africa	Record daily precipitation	43.7 mm (1.7 in)	38 of 100 (Notable)
Rosherville (Pow)	South Africa	Record daily precipitation	43.9 mm (1.7 in)	38 of 100 (Notable)
Pretoria-New Cemetry	South Africa	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Premier Mine-Cullinan	South Africa	Record daily precipitation	52.6 mm (2.1 in)	38 of 100 (Notable)
Ft Valley	United States	Record daily snowfall	11.4 cm (4.5 in)	38 of 100 (Notable)
Mesa	United States	Record low maximum temperature	16.7 C (62.1 F)	38 of 100 (Notable)
Zion Np	United States	Record daily precipitation	28.2 mm (1.1 in)	38 of 100 (Notable)
Vlakfontein	South Africa	Record daily precipitation	45.5 mm (1.8 in)	37 of 100 (Notable)
Irene	South Africa	Record daily precipitation	47.0 mm (1.9 in)	37 of 100 (Notable)
Pilanesberg-Pol	South Africa	Record daily precipitation	44.5 mm (1.8 in)	37 of 100 (Notable)
De Wagendrift	South Africa	Record daily precipitation	37.3 mm (1.5 in)	37 of 100 (Notable)
Kalkfontein	South Africa	Record daily precipitation	33.0 mm (1.3 in)	37 of 100 (Notable)
Lamar	United States	Record daily precipitation	46.2 mm (1.8 in)	37 of 100 (Notable)
Maraisburg (Gm)	South Africa	Record daily precipitation	46.2 mm (1.8 in)	36 of 100 (Notable)
New Market	South Africa	Record daily precipitation	44.7 mm (1.8 in)	36 of 100 (Notable)
Waterkloof	South Africa	Record daily precipitation	46.7 mm (1.8 in)	36 of 100 (Notable)
Donkerhoek (Skl)	South Africa	Record daily precipitation	56.9 mm (2.2 in)	36 of 100 (Notable)

Counts by Type and Timescale

736 records

Records set or tied on 15 May 1951 by type: Highest daily maximum 114, Lowest daily maximum 91, Highest daily minimum 103, Lowest daily minimum 33, Heaviest daily rainfall 385, Heaviest daily snowfall 4, Deepest snow cover 6.

Records on 15 May 1951 by type
Record type	Records
Highest daily maximum	114
Lowest daily maximum	91
Highest daily minimum	103
Lowest daily minimum	33
Heaviest daily rainfall	385
Heaviest daily snowfall	4
Deepest snow cover	6

Records on 15 May 1951 by timescale: all-time 2, monthly 19, daily 715.

How Much Records Were Beaten By

654 broken records

Margins by which the 654 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 190.0. Ties are not counted.

Top 20 by Significance

15 May 1951

Top 20 records on 15 May 1951 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1951	Holly, US	all-time rain	118.1 mm (4.6 in)	35.5 mm (1.4 in)	47 years	71 of 100 (Major)
15 May 1951	Two Buttes, US	all-time rain	167.6 mm (6.6 in)	53.3 mm (2.1 in)	8 years	67 of 100 (Major)
15 May 1951	Springfield, US	monthly rain	137.2 mm (5.4 in)	35.6 mm (1.4 in)	56 years	58 of 100 (Notable)
15 May 1951	Rooiberg, ZA	daily rain	37.1 mm (1.5 in)	36.8 mm (1.4 in)	40 years	56 of 100 (Notable)
15 May 1951	Jhb-Braamfontein (Cem), ZA	daily rain	50.3 mm (2.0 in)	38.1 mm (1.5 in)	21 years	51 of 100 (Notable)
15 May 1951	Jhb-Joubert Park, ZA	daily rain	49.5 mm (1.9 in)	38.6 mm (1.5 in)	21 years	51 of 100 (Notable)
15 May 1951	Atkinson 3SW, US	daily rain	69.6 mm (2.7 in)	51.3 mm (2.0 in)	25 years	51 of 100 (Notable)
15 May 1951	Wauneta, US	daily rain	76.7 mm (3.0 in)	52.6 mm (2.1 in)	22 years	51 of 100 (Notable)
15 May 1951	Industria, ZA	daily rain	43.2 mm (1.7 in)	35.1 mm (1.4 in)	21 years	50 of 100 (Notable)
15 May 1951	Jhb-Vrededorp, ZA	daily rain	41.9 mm (1.6 in)	31.2 mm (1.2 in)	21 years	50 of 100 (Notable)
15 May 1951	Saint Francis, US	daily rain	97.3 mm (3.8 in)	64.8 mm (2.6 in)	22 years	50 of 100 (Notable)
15 May 1951	Jhb-Zoological Garden, ZA	daily rain	48.5 mm (1.9 in)	36.3 mm (1.4 in)	21 years	49 of 100 (Notable)
15 May 1951	Springkell, ZA	daily rain	47.0 mm (1.9 in)	39.6 mm (1.6 in)	21 years	49 of 100 (Notable)
15 May 1951	Potgietersrus, ZA	daily rain	27.7 mm (1.1 in)	27.7 mm (1.1 in)	46 years	49 of 100 (Notable)
15 May 1951	Syracuse 1NE, US	monthly rain	93.0 mm (3.7 in)	29.8 mm (1.2 in)	18 years	49 of 100 (Notable)
15 May 1951	Springbok, ZA	daily rain	38.9 mm (1.5 in)	22.1 mm (0.9 in)	53 years	48 of 100 (Notable)
15 May 1951	Leeupoort, ZA	daily rain	40.1 mm (1.6 in)	37.6 mm (1.5 in)	16 years	48 of 100 (Notable)
15 May 1951	Newport, US	daily rain	47.0 mm (1.9 in)	35.1 mm (1.4 in)	48 years	48 of 100 (Notable)
15 May 1951	Heidelberg I, ZA	daily rain	49.8 mm (2.0 in)	38.1 mm (1.5 in)	21 years	47 of 100 (Notable)
15 May 1951	Roodekuil, ZA	daily rain	34.8 mm (1.4 in)	31.5 mm (1.2 in)	40 years	47 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 1951

Records set or tied on this calendar date in each year from 1820 to 1951. 1951 had 736 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 1951-05-15: 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 25	578
25 to 50	66
50 to 75	5
75 to 100	0
100 to 125	2
125 to 150	2
150 to 175	0
175 to 200	1