Weather Records on 15 May 1999

810 weather records were set or tied worldwide on 15 May 1999. Highest significance: Dubois, US.

Key Facts for 15 May 1999

On 15 May 1999, 810 weather records were set or tied at long-record stations worldwide.
260 were record highs and 339 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 23 monthly and 786 daily.
Dubois set a daily record snowfall of 15.2 cm (6.0 in) on 15 May 1999.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 428 records.

Record Map

810 stations

810 station records on 15 May 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dubois	United States	Record daily snowfall	15.2 cm (6.0 in)	73 of 100 (Major)
Norton 9SSE	United States	Record daily precipitation	64.0 mm (2.5 in)	67 of 100 (Major)
Siler City 2 N	United States	Record daily precipitation	80.0 mm (3.1 in)	62 of 100 (Major)
Finca Hamburgo	Mexico	Record daily precipitation	127.8 mm (5.0 in)	56 of 100 (Notable)
Red Cloud	United States	Record daily precipitation	38.1 mm (1.5 in)	52 of 100 (Notable)
Postville	United States	Record daily precipitation	59.7 mm (2.4 in)	51 of 100 (Notable)
Wittenoom	Australia	Record daily precipitation	52.8 mm (2.1 in)	50 of 100 (Notable)
Clover Valley	United States	Record daily snowfall	5.1 cm (2.0 in)	50 of 100 (Notable)
Hillside Station	Australia	Record daily precipitation	43.0 mm (1.7 in)	49 of 100 (Notable)
Guide Rock	United States	Record daily precipitation	43.2 mm (1.7 in)	49 of 100 (Notable)
Sylvania	Australia	Record daily precipitation	40.0 mm (1.6 in)	48 of 100 (Notable)
Santa Rosa de Lima (Camboata)	Brazil	Record daily precipitation	59.2 mm (2.3 in)	48 of 100 (Notable)
Biskra	Algeria	Record high maximum temperature	41.3 C (106.3 F)	46 of 100 (Notable)
Melbourne Regional Office	Australia	Record low maximum temperature	10.4 C (50.7 F)	46 of 100 (Notable)
Santa Cruz Do Piaui	Brazil	Record daily precipitation	62.4 mm (2.5 in)	46 of 100 (Notable)
Harlan Co Lake	United States	Record daily precipitation	31.5 mm (1.2 in)	46 of 100 (Notable)
Lady Barron (Franklin Parade)	Australia	Record daily precipitation	30.0 mm (1.2 in)	45 of 100 (Notable)
Flinders Island Airport	Australia	Record daily precipitation	40.2 mm (1.6 in)	45 of 100 (Notable)
Crescent City 3 NNW	United States	Record low minimum temperature	1.7 C (35.1 F)	45 of 100 (Notable)
Huetamo	Mexico	Record low maximum temperature	32.8 C (91.0 F)	44 of 100 (Notable)
Beaver City	United States	Record daily precipitation	33.0 mm (1.3 in)	44 of 100 (Notable)
Prairie Downs	Australia	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
Sandy Hook	United States	Record low minimum temperature	5.6 C (42.1 F)	43 of 100 (Notable)
Elephant Butte Dam	United States	Record high minimum temperature	20.0 C (68.0 F)	43 of 100 (Notable)
Pocatello Rgnl AP	United States	Record daily snowfall	7.6 cm (3.0 in)	43 of 100 (Notable)
Abilene	United States	Record daily precipitation	31.8 mm (1.3 in)	42 of 100 (Notable)
Richmond	United States	Record daily snowfall	5.1 cm (2.0 in)	42 of 100 (Notable)
Lexington	United States	Record low maximum temperature	12.8 C (55.0 F)	42 of 100 (Notable)
Moorcroft 3S	United States	Record low maximum temperature	5.0 C (41.0 F)	42 of 100 (Notable)
Yallunda Flat (Meetigilly)	Australia	Record daily precipitation	25.0 mm (1.0 in)	41 of 100 (Notable)
Manteo AP	United States	Record daily precipitation	74.4 mm (2.9 in)	41 of 100 (Notable)
Oakley	United States	Record low maximum temperature	8.9 C (48.0 F)	40 of 100 (Notable)
Enterprise	United States	Record daily precipitation	27.9 mm (1.1 in)	40 of 100 (Notable)
Lovelock	United States	Record low minimum temperature	-3.3 C (26.1 F)	40 of 100 (Notable)
Uraidla	Australia	Record daily precipitation	43.0 mm (1.7 in)	39 of 100 (Notable)
Weeaproinah	Australia	Record daily precipitation	58.0 mm (2.3 in)	39 of 100 (Notable)
Wingaroo	Australia	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Cerro de Ortega	Mexico	Record low maximum temperature	24.4 C (75.9 F)	39 of 100 (Notable)
Willits 1 NE	United States	Record low minimum temperature	-2.2 C (28.0 F)	39 of 100 (Notable)
Esbon 7 N	United States	Record daily precipitation	39.1 mm (1.5 in)	39 of 100 (Notable)
Dubois	United States	Record snow depth	12.7 cm (5.0 in)	39 of 100 (Notable)
Gellibrand River Forestry	Australia	Record daily precipitation	49.2 mm (1.9 in)	38 of 100 (Notable)
Upanema (Dnocs)	Brazil	Record daily precipitation	68.3 mm (2.7 in)	38 of 100 (Notable)
Lincoln 1 SE	United States	Record daily precipitation	43.2 mm (1.7 in)	38 of 100 (Notable)
Hot Springs	United States	Record low maximum temperature	10.0 C (50.0 F)	38 of 100 (Notable)
Wrattonbully (Joeville)	Australia	Record daily precipitation	27.0 mm (1.1 in)	37 of 100 (Notable)
Apollo Bay	Australia	Record daily precipitation	29.0 mm (1.1 in)	37 of 100 (Notable)
Burr Oak 4S	United States	Record daily precipitation	30.7 mm (1.2 in)	37 of 100 (Notable)
Norton Dam	United States	Record daily precipitation	55.1 mm (2.2 in)	37 of 100 (Notable)
Monroe 2 SE	United States	Record daily precipitation	41.9 mm (1.6 in)	37 of 100 (Notable)
Tibooburra Post Office	Australia	Record high maximum temperature	28.4 C (83.1 F)	36 of 100 (Notable)
Bangalore	India	Record daily precipitation	47.0 mm (1.9 in)	36 of 100 (Notable)
Zuara	Libya	Record high minimum temperature	22.5 C (72.5 F)	36 of 100 (Notable)
Leba	Poland	Record daily precipitation	46.0 mm (1.8 in)	36 of 100 (Notable)
Butte 5SE	United States	Record daily precipitation	37.3 mm (1.5 in)	36 of 100 (Notable)
Green Rvr	United States	Record low minimum temperature	-6.1 C (21.0 F)	36 of 100 (Notable)
Wilsons Promontory Lighthouse	Australia	Record daily precipitation	52.6 mm (2.1 in)	35 of 100 (Notable)
Whitemark Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	35 of 100 (Notable)
Temilpa	Mexico	Record low minimum temperature	8.9 C (48.0 F)	35 of 100 (Notable)
Tanana AP	United States	Record high minimum temperature	8.9 C (48.0 F)	35 of 100 (Notable)

Counts by Type and Timescale

810 records

Records set or tied on 15 May 1999 by type: Highest daily maximum 126, Lowest daily maximum 166, Highest daily minimum 134, Lowest daily minimum 173, Heaviest daily rainfall 190, Heaviest daily snowfall 14, Deepest snow cover 7.

Records on 15 May 1999 by type
Record type	Records
Highest daily maximum	126
Lowest daily maximum	166
Highest daily minimum	134
Lowest daily minimum	173
Heaviest daily rainfall	190
Heaviest daily snowfall	14
Deepest snow cover	7

Records on 15 May 1999 by timescale: all-time 1, monthly 23, daily 786.

How Much Records Were Beaten By

623 broken records

Margins by which the 623 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 635.0. Ties are not counted.

Top 20 by Significance

15 May 1999

Top 20 records on 15 May 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1999	Dubois, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	88 years	73 of 100 (Major)
15 May 1999	Norton 9SSE, US	daily rain	64.0 mm (2.5 in)	32.2 mm (1.3 in)	100 years	67 of 100 (Major)
15 May 1999	Siler City 2 N, US	daily rain	80.0 mm (3.1 in)	52.1 mm (2.1 in)	48 years	62 of 100 (Major)
15 May 1999	Finca Hamburgo, MX	daily rain	127.8 mm (5.0 in)	92.7 mm (3.6 in)	40 years	56 of 100 (Notable)
15 May 1999	Red Cloud, US	daily rain	38.1 mm (1.5 in)	14.0 mm (0.6 in)	100 years	52 of 100 (Notable)
15 May 1999	Postville, US	daily rain	59.7 mm (2.4 in)	19.8 mm (0.8 in)	89 years	51 of 100 (Notable)
15 May 1999	Wittenoom, AU	daily rain	52.8 mm (2.1 in)	48.5 mm (1.9 in)	25 years	50 of 100 (Notable)
15 May 1999	Clover Valley, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	101 years	50 of 100 (Notable)
15 May 1999	Hillside Station, AU	daily rain	43.0 mm (1.7 in)	40.2 mm (1.6 in)	25 years	49 of 100 (Notable)
15 May 1999	Guide Rock, US	daily rain	43.2 mm (1.7 in)	21.9 mm (0.9 in)	70 years	49 of 100 (Notable)
15 May 1999	Sylvania, AU	daily rain	40.0 mm (1.6 in)	37.0 mm (1.5 in)	30 years	48 of 100 (Notable)
15 May 1999	Santa Rosa de Lima (Camboata), BR	daily rain	59.2 mm (2.3 in)	34.7 mm (1.4 in)	45 years	48 of 100 (Notable)
15 May 1999	Biskra, DZ	daily high max	41.3 C (106.3 F)	4.3 C (7.7 F)	86 years	46 of 100 (Notable)
15 May 1999	Melbourne Regional Office, AU	daily low max	10.4 C (50.7 F)	1.9 C (3.4 F)	120 years	46 of 100 (Notable)
15 May 1999	Santa Cruz Do Piaui, BR	daily rain	62.4 mm (2.5 in)	59.6 mm (2.3 in)	12 years	46 of 100 (Notable)
15 May 1999	Harlan Co Lake, US	daily rain	31.5 mm (1.2 in)	7.9 mm (0.31 in)	100 years	46 of 100 (Notable)
15 May 1999	Lady Barron (Franklin Parade), AU	daily rain	30.0 mm (1.2 in)	10.2 mm (0.4 in)	81 years	45 of 100 (Notable)
15 May 1999	Flinders Island Airport, AU	daily rain	40.2 mm (1.6 in)	20.9 mm (0.8 in)	46 years	45 of 100 (Notable)
15 May 1999	Crescent City 3 NNW, US	daily low min	1.7 C (35.1 F)	1.6 C (2.9 F)	99 years	45 of 100 (Notable)
15 May 1999	Huetamo, MX	daily low max	32.8 C (91.0 F)	3.9 C (7.0 F)	69 years	44 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 1999

Records set or tied on this calendar date in each year from 1820 to 1999. 1999 had 810 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 1999-05-15: 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 100	619
100 to 200	2
200 to 300	0
300 to 400	0
400 to 500	0
500 to 600	1
600 to 700	1