Weather Records on 15 May 1998

1,641 weather records were set or tied worldwide on 15 May 1998. Highest significance: Isis Downs, AU.

Key Facts for 15 May 1998

On 15 May 1998, 1,641 weather records were set or tied at long-record stations worldwide.
1,113 were record highs and 319 were record lows, counting maximum and minimum temperature.
By timescale, 7 were all-time records, 56 monthly and 1,578 daily.
Isis Downs set a daily record precipitation of 103.0 mm (4.1 in) on 15 May 1998.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 423 records.

Record Map

1,641 stations

1,641 station records on 15 May 1998 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1998: highest significance records shown on the map
Station	Country	Type	Value	Significance
Isis Downs	Australia	Record daily precipitation	103.0 mm (4.1 in)	79 of 100 (Major)
Kalamia Estate	Australia	Record daily precipitation	72.0 mm (2.8 in)	61 of 100 (Major)
Millau	France	Record daily precipitation	74.8 mm (2.9 in)	60 of 100 (Major)
Valley of Lagoons	Australia	Record daily precipitation	77.6 mm (3.1 in)	56 of 100 (Notable)
Ceduna (Maltee)	Australia	Record daily precipitation	27.8 mm (1.1 in)	55 of 100 (Notable)
Macknade Sugar Mill	Australia	Record daily precipitation	121.0 mm (4.8 in)	55 of 100 (Notable)
Burdekin Shire Council	Australia	Record daily precipitation	50.5 mm (2.0 in)	55 of 100 (Notable)
Swea City 5N	United States	Record daily precipitation	76.2 mm (3.0 in)	53 of 100 (Notable)
Hayward Rs	United States	Record high minimum temperature	20.0 C (68.0 F)	53 of 100 (Notable)
Halifax Macrossan St	Australia	Record daily precipitation	113.0 mm (4.4 in)	52 of 100 (Notable)
Burenda	Australia	Record daily precipitation	39.0 mm (1.5 in)	51 of 100 (Notable)
Ayutla (Cfe)	Mexico	Record low minimum temperature	11.7 C (53.1 F)	50 of 100 (Notable)
Bambaroo	Australia	Record daily precipitation	87.6 mm (3.4 in)	49 of 100 (Notable)
Bemerside	Australia	Record daily precipitation	123.2 mm (4.9 in)	49 of 100 (Notable)
Weona	Australia	Record daily precipitation	87.2 mm (3.4 in)	49 of 100 (Notable)
Ingham Composite	Australia	Record daily precipitation	103.0 mm (4.1 in)	49 of 100 (Notable)
Intl Falls Intl AP	United States	Record daily precipitation	40.1 mm (1.6 in)	49 of 100 (Notable)
Home Hill Post Office	Australia	Record daily precipitation	63.2 mm (2.5 in)	48 of 100 (Notable)
Thornleigh	Australia	Record daily precipitation	74.0 mm (2.9 in)	47 of 100 (Notable)
Bricelyn	United States	Record daily precipitation	44.5 mm (1.8 in)	47 of 100 (Notable)
Hayward Rs	United States	Record high maximum temperature	32.2 C (90.0 F)	47 of 100 (Notable)
Hatteras	United States	Record low maximum temperature	13.9 C (57.0 F)	47 of 100 (Notable)
Winona	United States	Record high minimum temperature	22.8 C (73.0 F)	46 of 100 (Notable)
Port Angeles	United States	Record daily precipitation	31.0 mm (1.2 in)	46 of 100 (Notable)
Isisford Post Office	Australia	Record daily precipitation	28.2 mm (1.1 in)	45 of 100 (Notable)
Morris W Cntrl Rsch & Outreach	United States	Record high minimum temperature	19.4 C (66.9 F)	45 of 100 (Notable)
Erick	United States	Record daily precipitation	66.5 mm (2.6 in)	45 of 100 (Notable)
Elphinstone Pocket No1	Australia	Record daily precipitation	64.4 mm (2.5 in)	44 of 100 (Notable)
Tambo Post Office	Australia	Record daily precipitation	44.8 mm (1.8 in)	44 of 100 (Notable)
Gowan Hills	Australia	Record daily precipitation	93.0 mm (3.7 in)	44 of 100 (Notable)
Keosauqua	United States	Record high minimum temperature	21.7 C (71.1 F)	44 of 100 (Notable)
Arlington 1 W	United States	Record daily precipitation	40.4 mm (1.6 in)	44 of 100 (Notable)
Victoria Sugar Mill	Australia	Record daily precipitation	92.0 mm (3.6 in)	43 of 100 (Notable)
Suhinici	Russia	Record daily precipitation	28.3 mm (1.1 in)	43 of 100 (Notable)
Cresco 1 NE	United States	Record high maximum temperature	31.7 C (89.1 F)	43 of 100 (Notable)
Harlan	United States	Record daily precipitation	68.6 mm (2.7 in)	43 of 100 (Notable)
Hatteras	United States	Record low minimum temperature	9.4 C (48.9 F)	43 of 100 (Notable)
Pskem	Uzbekistan	Record daily precipitation	53.1 mm (2.1 in)	43 of 100 (Notable)
Smoky Bay (Puntabie)	Australia	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Corning	United States	Record high minimum temperature	22.8 C (73.0 F)	42 of 100 (Notable)
Hyannis	United States	Record low maximum temperature	8.9 C (48.0 F)	42 of 100 (Notable)
Crookston NW Exp STN	United States	Record daily precipitation	63.5 mm (2.5 in)	42 of 100 (Notable)
Castlewood	United States	Record high minimum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Townsville Railway STN	Australia	Record daily precipitation	29.0 mm (1.1 in)	41 of 100 (Notable)
Pte de Chassiron	France	Record high minimum temperature	17.1 C (62.8 F)	41 of 100 (Notable)
Coeur D'Alene	United States	Record low maximum temperature	8.9 C (48.0 F)	41 of 100 (Notable)
Princeton	United States	Record high minimum temperature	20.6 C (69.1 F)	41 of 100 (Notable)
Murfreesboro 5 N	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Angellala Downs Homestead	Australia	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Senno	Belarus	Record daily precipitation	27.9 mm (1.1 in)	40 of 100 (Notable)
Boqueirao	Brazil	Record daily precipitation	91.7 mm (3.6 in)	40 of 100 (Notable)
Pitea	Sweden	Record high maximum temperature	23.4 C (74.1 F)	40 of 100 (Notable)
St Peter	United States	Record high maximum temperature	32.8 C (91.0 F)	40 of 100 (Notable)
Dayton Mcd	United States	Record high maximum temperature	33.9 C (93.0 F)	40 of 100 (Notable)
Wellshot	Australia	Record daily precipitation	27.0 mm (1.1 in)	39 of 100 (Notable)
Redford	Australia	Record daily precipitation	27.4 mm (1.1 in)	39 of 100 (Notable)
Owatonna	United States	Record daily precipitation	39.4 mm (1.6 in)	39 of 100 (Notable)
Jackson	United States	Record high minimum temperature	22.2 C (72.0 F)	39 of 100 (Notable)
Ogdensburg 4 NE	United States	Record high maximum temperature	28.9 C (84.0 F)	39 of 100 (Notable)
Weyerhaeuser 1N	United States	Record high minimum temperature	16.7 C (62.1 F)	39 of 100 (Notable)

Counts by Type and Timescale

1,641 records

Records set or tied on 15 May 1998 by type: Highest daily maximum 573, Lowest daily maximum 134, Highest daily minimum 540, Lowest daily minimum 185, Heaviest daily rainfall 207, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 15 May 1998 by type
Record type	Records
Highest daily maximum	573
Lowest daily maximum	134
Highest daily minimum	540
Lowest daily minimum	185
Heaviest daily rainfall	207
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 15 May 1998 by timescale: all-time 7, monthly 56, daily 1,578.

How Much Records Were Beaten By

1,227 broken records

Margins by which the 1,227 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 84.6. Ties are not counted.

Top 20 by Significance

15 May 1998

Top 20 records on 15 May 1998 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1998	Isis Downs, AU	daily rain	103.0 mm (4.1 in)	64.9 mm (2.6 in)	97 years	79 of 100 (Major)
15 May 1998	Kalamia Estate, AU	daily rain	72.0 mm (2.8 in)	64.1 mm (2.5 in)	67 years	61 of 100 (Major)
15 May 1998	Millau, FR	monthly rain	74.8 mm (2.9 in)	26.8 mm (1.1 in)	33 years	60 of 100 (Major)
15 May 1998	Valley of Lagoons, AU	daily rain	77.6 mm (3.1 in)	60.6 mm (2.4 in)	20 years	56 of 100 (Notable)
15 May 1998	Ceduna (Maltee), AU	daily rain	27.8 mm (1.1 in)	15.1 mm (0.6 in)	45 years	55 of 100 (Notable)
15 May 1998	Macknade Sugar Mill, AU	daily rain	121.0 mm (4.8 in)	60.6 mm (2.4 in)	20 years	55 of 100 (Notable)
15 May 1998	Burdekin Shire Council, AU	daily rain	50.5 mm (2.0 in)	28.9 mm (1.1 in)	105 years	55 of 100 (Notable)
15 May 1998	Swea City 5N, US	daily rain	76.2 mm (3.0 in)	59.2 mm (2.3 in)	32 years	53 of 100 (Notable)
15 May 1998	Hayward Rs, US	daily high min	20.0 C (68.0 F)	7.2 C (13.0 F)	103 years	53 of 100 (Notable)
15 May 1998	Halifax Macrossan St, AU	daily rain	113.0 mm (4.4 in)	80.6 mm (3.2 in)	7 years	52 of 100 (Notable)
15 May 1998	Burenda, AU	daily rain	39.0 mm (1.5 in)	13.3 mm (0.5 in)	105 years	51 of 100 (Notable)
15 May 1998	Ayutla (Cfe), MX	daily low min	11.7 C (53.1 F)	6.6 C (11.9 F)	27 years	50 of 100 (Notable)
15 May 1998	Bambaroo, AU	daily rain	87.6 mm (3.4 in)	43.7 mm (1.7 in)	20 years	49 of 100 (Notable)
15 May 1998	Bemerside, AU	daily rain	123.2 mm (4.9 in)	84.6 mm (3.3 in)	7 years	49 of 100 (Notable)
15 May 1998	Weona, AU	daily rain	87.2 mm (3.4 in)	68.6 mm (2.7 in)	20 years	49 of 100 (Notable)
15 May 1998	Ingham Composite, AU	daily rain	103.0 mm (4.1 in)	57.0 mm (2.2 in)	20 years	49 of 100 (Notable)
15 May 1998	Intl Falls Intl AP, US	daily rain	40.1 mm (1.6 in)	12.7 mm (0.5 in)	81 years	49 of 100 (Notable)
15 May 1998	Home Hill Post Office, AU	daily rain	63.2 mm (2.5 in)	54.3 mm (2.1 in)	67 years	48 of 100 (Notable)
15 May 1998	Thornleigh, AU	daily rain	74.0 mm (2.9 in)	62.6 mm (2.5 in)	20 years	47 of 100 (Notable)
15 May 1998	Bricelyn, US	daily rain	44.5 mm (1.8 in)	31.8 mm (1.3 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 1998

Records set or tied on this calendar date in each year from 1820 to 1998. 1998 had 1,641 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 1998-05-15: 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).

Histogram of margins by which records were beaten on 15 May 1998
Margin	Records
0 to 20	1,177
20 to 40	30
40 to 60	11
60 to 80	7
80 to 100	2