Weather Records on 15 May 1984

1,059 weather records were set or tied worldwide on 15 May 1984. Highest significance: Worcester, ZA.

Key Facts for 15 May 1984

On 15 May 1984, 1,059 weather records were set or tied at long-record stations worldwide.
338 were record highs and 398 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 13 monthly and 1,045 daily.
Worcester set a daily record precipitation of 42.7 mm (1.7 in) on 15 May 1984.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 427 records.

Record Map

1,059 stations

1,059 station records on 15 May 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Worcester	South Africa	Record daily precipitation	42.7 mm (1.7 in)	67 of 100 (Major)
El Dorado	United States	Record daily precipitation	66.3 mm (2.6 in)	62 of 100 (Major)
Villiersdorp	South Africa	Record daily precipitation	112.0 mm (4.4 in)	58 of 100 (Notable)
Bet-El	South Africa	Record daily precipitation	32.0 mm (1.3 in)	58 of 100 (Notable)
Elk City 1NE	United States	Record daily precipitation	26.7 mm (1.1 in)	58 of 100 (Notable)
Welbedacht	South Africa	Record daily precipitation	44.0 mm (1.7 in)	55 of 100 (Notable)
Redelinghuis (Pol)	South Africa	Record daily precipitation	34.0 mm (1.3 in)	53 of 100 (Notable)
Ruidoso	United States	Record daily precipitation	39.6 mm (1.6 in)	53 of 100 (Notable)
Agartala	India	Record daily precipitation	115.1 mm (4.5 in)	51 of 100 (Notable)
Mtn Park	United States	Record daily precipitation	33.0 mm (1.3 in)	51 of 100 (Notable)
Zverinogolovskaja	Russia	Record daily precipitation	26.5 mm (1.0 in)	50 of 100 (Notable)
Touws River	South Africa	Record daily precipitation	31.0 mm (1.2 in)	50 of 100 (Notable)
Winfield 3NE	United States	Record daily precipitation	63.5 mm (2.5 in)	50 of 100 (Notable)
Philadelphia Polisie	South Africa	Record daily precipitation	30.3 mm (1.2 in)	49 of 100 (Notable)
Lebanon (Bos)	South Africa	Record daily precipitation	58.0 mm (2.3 in)	48 of 100 (Notable)
Danner	United States	Record daily precipitation	27.9 mm (1.1 in)	48 of 100 (Notable)
Cheljabinsk-Balandi	Russia	Record daily precipitation	25.8 mm (1.0 in)	47 of 100 (Notable)
Levan	United States	Record high minimum temperature	15.6 C (60.1 F)	46 of 100 (Notable)
San Pedro Piedra Gorda -Ciuda	Mexico	Record daily precipitation	31.8 mm (1.3 in)	45 of 100 (Notable)
Elandsfontein	South Africa	Record daily precipitation	51.0 mm (2.0 in)	42 of 100 (Notable)
Lokenburg	South Africa	Record daily precipitation	48.0 mm (1.9 in)	42 of 100 (Notable)
Norfolk 2 SW	United States	Record low maximum temperature	9.4 C (48.9 F)	42 of 100 (Notable)
Austin #2	United States	Record daily precipitation	25.1 mm (1.0 in)	42 of 100 (Notable)
Plattsburgh AFB	United States	Record low maximum temperature	8.9 C (48.0 F)	42 of 100 (Notable)
Vredenburg (Pol)	South Africa	Record daily precipitation	29.0 mm (1.1 in)	41 of 100 (Notable)
Santa Rosa	Mexico	Record low maximum temperature	18.9 C (66.0 F)	40 of 100 (Notable)
Durbanville (Pol)	South Africa	Record daily precipitation	47.5 mm (1.9 in)	40 of 100 (Notable)
Morgantown Muni AP	United States	Record low maximum temperature	10.6 C (51.1 F)	40 of 100 (Notable)
Brasopolis	Brazil	Record daily precipitation	66.4 mm (2.6 in)	39 of 100 (Notable)
Tulbagh (Pol)	South Africa	Record daily precipitation	51.5 mm (2.0 in)	39 of 100 (Notable)
Nieuwoudville (Pol)	South Africa	Record daily precipitation	34.5 mm (1.4 in)	39 of 100 (Notable)
Lakeview	United States	Record daily precipitation	30.2 mm (1.2 in)	38 of 100 (Notable)
The Towers	South Africa	Record daily precipitation	36.0 mm (1.4 in)	37 of 100 (Notable)
La Plaisante	South Africa	Record daily precipitation	57.5 mm (2.3 in)	37 of 100 (Notable)
Aztec Ruins Nm	United States	Record high minimum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Perpignan	France	Record low minimum temperature	5.0 C (41.0 F)	36 of 100 (Notable)
Campeche (Dge)	Mexico	Record daily precipitation	110.0 mm (4.3 in)	36 of 100 (Notable)
Rawsonville (Pol)	South Africa	Record daily precipitation	95.0 mm (3.7 in)	36 of 100 (Notable)
Doornrivier	South Africa	Record daily precipitation	32.5 mm (1.3 in)	36 of 100 (Notable)
Moscow U of I	United States	Record low maximum temperature	5.6 C (42.1 F)	36 of 100 (Notable)
Lancaster	United States	Record low maximum temperature	12.2 C (54.0 F)	36 of 100 (Notable)
Henderson 2 NNW	United States	Record high maximum temperature	35.0 C (95.0 F)	36 of 100 (Notable)
Fazenda Acude	Brazil	Record daily precipitation	39.7 mm (1.6 in)	35 of 100 (Notable)
Ahuacatlan	Mexico	Record low maximum temperature	27.8 C (82.0 F)	35 of 100 (Notable)
San Jeronimo Taviche	Mexico	Record daily precipitation	38.9 mm (1.5 in)	35 of 100 (Notable)
Ionia 2SSW	United States	Record low minimum temperature	-1.7 C (28.9 F)	35 of 100 (Notable)
Paradise Valley 1 NW	United States	Record low maximum temperature	8.9 C (48.0 F)	35 of 100 (Notable)
Guiyang	China	Record daily precipitation	79.7 mm (3.1 in)	34 of 100 (Routine)
Matjiesfontein (Sar)	South Africa	Record daily precipitation	25.5 mm (1.0 in)	34 of 100 (Routine)
Agterkop	South Africa	Record daily precipitation	40.0 mm (1.6 in)	34 of 100 (Routine)
Gila Bend 2SE	United States	Record high minimum temperature	22.8 C (73.0 F)	34 of 100 (Routine)
Fruita	United States	Record high minimum temperature	15.0 C (59.0 F)	34 of 100 (Routine)
Dixie	United States	Record daily precipitation	26.2 mm (1.0 in)	34 of 100 (Routine)
Fruitland	United States	Record high minimum temperature	13.3 C (55.9 F)	34 of 100 (Routine)
Tapiratiba	Brazil	Record daily precipitation	31.0 mm (1.2 in)	32 of 100 (Routine)
Pontal	Brazil	Record daily precipitation	33.5 mm (1.3 in)	32 of 100 (Routine)
El Chico	Mexico	Record daily precipitation	42.9 mm (1.7 in)	32 of 100 (Routine)
Corrales	Mexico	Record low minimum temperature	8.9 C (48.0 F)	32 of 100 (Routine)
Tortosa - Observatorio del Ebr	Spain	Record low minimum temperature	6.3 C (43.3 F)	32 of 100 (Routine)
Jornada Exp Range	United States	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)

Counts by Type and Timescale

1,059 records

Records set or tied on 15 May 1984 by type: Highest daily maximum 129, Lowest daily maximum 169, Highest daily minimum 209, Lowest daily minimum 229, Heaviest daily rainfall 312, Heaviest daily snowfall 7, Deepest snow cover 4.

Records on 15 May 1984 by type
Record type	Records
Highest daily maximum	129
Lowest daily maximum	169
Highest daily minimum	209
Lowest daily minimum	229
Heaviest daily rainfall	312
Heaviest daily snowfall	7
Deepest snow cover	4

Records on 15 May 1984 by timescale: all-time 1, monthly 13, daily 1,045.

How Much Records Were Beaten By

791 broken records

Margins by which the 791 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 90.9. Ties are not counted.

Top 20 by Significance

15 May 1984

Top 20 records on 15 May 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1984	Worcester, ZA	daily rain	42.7 mm (1.7 in)	27.5 mm (1.1 in)	61 years	67 of 100 (Major)
15 May 1984	El Dorado, US	daily rain	66.3 mm (2.6 in)	40.9 mm (1.6 in)	87 years	62 of 100 (Major)
15 May 1984	Villiersdorp, ZA	daily rain	112.0 mm (4.4 in)	90.9 mm (3.6 in)	42 years	58 of 100 (Notable)
15 May 1984	Bet-El, ZA	daily rain	32.0 mm (1.3 in)	25.4 mm (1.0 in)	46 years	58 of 100 (Notable)
15 May 1984	Elk City 1NE, US	daily rain	26.7 mm (1.1 in)	17.3 mm (0.7 in)	67 years	58 of 100 (Notable)
15 May 1984	Welbedacht, ZA	daily rain	44.0 mm (1.7 in)	31.6 mm (1.2 in)	46 years	55 of 100 (Notable)
15 May 1984	Redelinghuis (Pol), ZA	daily rain	34.0 mm (1.3 in)	23.8 mm (0.9 in)	46 years	53 of 100 (Notable)
15 May 1984	Ruidoso, US	daily rain	39.6 mm (1.6 in)	30.5 mm (1.2 in)	31 years	53 of 100 (Notable)
15 May 1984	Agartala, IN	daily rain	115.1 mm (4.5 in)	67.3 mm (2.6 in)	66 years	51 of 100 (Notable)
15 May 1984	Mtn Park, US	daily rain	33.0 mm (1.3 in)	22.3 mm (0.9 in)	60 years	51 of 100 (Notable)
15 May 1984	Zverinogolovskaja, RU	daily rain	26.5 mm (1.0 in)	22.6 mm (0.9 in)	22 years	50 of 100 (Notable)
15 May 1984	Touws River, ZA	daily rain	31.0 mm (1.2 in)	19.8 mm (0.8 in)	46 years	50 of 100 (Notable)
15 May 1984	Winfield 3NE, US	daily rain	63.5 mm (2.5 in)	26.4 mm (1.0 in)	84 years	50 of 100 (Notable)
15 May 1984	Philadelphia Polisie, ZA	daily rain	30.3 mm (1.2 in)	20.9 mm (0.8 in)	61 years	49 of 100 (Notable)
15 May 1984	Lebanon (Bos), ZA	daily rain	58.0 mm (2.3 in)	33.6 mm (1.3 in)	46 years	48 of 100 (Notable)
15 May 1984	Danner, US	daily rain	27.9 mm (1.1 in)	17.2 mm (0.7 in)	35 years	48 of 100 (Notable)
15 May 1984	Cheljabinsk-Balandi, RU	daily rain	25.8 mm (1.0 in)	10.4 mm (0.4 in)	58 years	47 of 100 (Notable)
15 May 1984	Levan, US	monthly high min	15.6 C (60.1 F)	0.6 C (1.1 F)	88 years	46 of 100 (Notable)
15 May 1984	San Pedro Piedra Gorda -Ciuda, MX	daily rain	31.8 mm (1.3 in)	27.0 mm (1.1 in)	26 years	45 of 100 (Notable)
15 May 1984	Elandsfontein, ZA	daily rain	51.0 mm (2.0 in)	26.9 mm (1.1 in)	46 years	42 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 1984

Records set or tied on this calendar date in each year from 1820 to 1984. 1984 had 1,059 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 1984-05-15: 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 20	747
20 to 40	34
40 to 60	5
60 to 80	4
80 to 100	1