Weather Records on 18 May 1998

1,060 weather records were set or tied worldwide on 18 May 1998. Highest significance: Kherson, UA.

Key Facts for 18 May 1998

On 18 May 1998, 1,060 weather records were set or tied at long-record stations worldwide.
697 were record highs and 230 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 32 monthly and 1,024 daily.
Kherson set a daily record precipitation of 100.1 mm (3.9 in) on 18 May 1998.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 439 records.

Record Map

1,060 stations

1,060 station records on 18 May 1998 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1998: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kherson	Ukraine	Record daily precipitation	100.1 mm (3.9 in)	80 of 100 (Exceptional)
Willow City	United States	Record daily precipitation	42.4 mm (1.7 in)	53 of 100 (Notable)
Upham 3 N	United States	Record daily precipitation	43.4 mm (1.7 in)	52 of 100 (Notable)
Wilmington 7 N	United States	Record daily precipitation	74.9 mm (2.9 in)	47 of 100 (Notable)
Raymond Terrace (Wallaroo Stat	Australia	Record daily precipitation	88.2 mm (3.5 in)	46 of 100 (Notable)
Bjorkasen	Norway	Record daily precipitation	44.6 mm (1.8 in)	46 of 100 (Notable)
Krakmo	Norway	Record daily precipitation	33.3 mm (1.3 in)	45 of 100 (Notable)
New London	United States	Record high maximum temperature	35.0 C (95.0 F)	45 of 100 (Notable)
Mount Kuring-Gai (Ledora Farm)	Australia	Record daily precipitation	84.0 mm (3.3 in)	44 of 100 (Notable)
Rosalia	United States	Record low maximum temperature	7.2 C (45.0 F)	44 of 100 (Notable)
Wondalli	Australia	Record daily precipitation	65.0 mm (2.6 in)	42 of 100 (Notable)
Hanty-Mansijsk	Russia	Record low minimum temperature	-7.6 C (18.3 F)	41 of 100 (Notable)
Lebanon 2W	United States	Record high minimum temperature	20.6 C (69.1 F)	41 of 100 (Notable)
Sisseton	United States	Record high minimum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Salisbury (Barrington Wilderne	Australia	Record daily precipitation	69.8 mm (2.7 in)	40 of 100 (Notable)
Richmond Raaf	Australia	Record daily precipitation	77.0 mm (3.0 in)	40 of 100 (Notable)
Waycross 4 NE	United States	Record high minimum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Berowra (Goodwyn Road)	Australia	Record daily precipitation	72.0 mm (2.8 in)	39 of 100 (Notable)
Collegeville St John's	United States	Record high minimum temperature	18.3 C (64.9 F)	39 of 100 (Notable)
Auburn 5 ESE	United States	Record high maximum temperature	35.6 C (96.1 F)	39 of 100 (Notable)
Tecumseh 1S	United States	Record high minimum temperature	18.9 C (66.0 F)	39 of 100 (Notable)
El Dorado Goodwin Fld	United States	Record high maximum temperature	33.9 C (93.0 F)	39 of 100 (Notable)
Sioux Ctr 2 SE	United States	Record high minimum temperature	19.4 C (66.9 F)	38 of 100 (Notable)
Cheboygan	United States	Record high minimum temperature	13.3 C (55.9 F)	38 of 100 (Notable)
Milan 1NW	United States	Record high maximum temperature	36.1 C (97.0 F)	38 of 100 (Notable)
Stanton	United States	Record high minimum temperature	20.6 C (69.1 F)	38 of 100 (Notable)
Traverse Cy Cherry Capital AP	United States	Record high maximum temperature	32.8 C (91.0 F)	38 of 100 (Notable)
Burlington Muni AP	United States	Record high maximum temperature	33.3 C (91.9 F)	38 of 100 (Notable)
Croppa Creek (Krui Plains)	Australia	Record daily precipitation	37.4 mm (1.5 in)	37 of 100 (Notable)
Beja	Portugal	Record daily precipitation	35.6 mm (1.4 in)	37 of 100 (Notable)
Harbor Beach 1 SSE	United States	Record high maximum temperature	31.7 C (89.1 F)	37 of 100 (Notable)
W Branch 3SE	United States	Record high minimum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Fairmont	United States	Record high minimum temperature	19.4 C (66.9 F)	37 of 100 (Notable)
Wakefield 3NW	United States	Record high minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Rhinelander	United States	Record high minimum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Weyerhaeuser 1N	United States	Record high minimum temperature	15.0 C (59.0 F)	37 of 100 (Notable)
Saginaw Mbs Intl AP	United States	Record high maximum temperature	33.3 C (91.9 F)	37 of 100 (Notable)
Yelarbon Post Office	Australia	Record daily precipitation	66.2 mm (2.6 in)	36 of 100 (Notable)
Antioch	United States	Record high maximum temperature	31.7 C (89.1 F)	36 of 100 (Notable)
Long Prairie	United States	Record high maximum temperature	34.4 C (93.9 F)	36 of 100 (Notable)
Walker	United States	Record high minimum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Huixtla	Mexico	Record low minimum temperature	17.8 C (64.0 F)	35 of 100 (Notable)
The Entrance (Eloora Street)	Australia	Record daily precipitation	93.0 mm (3.7 in)	34 of 100 (Routine)
San Miguel Ejutla	Mexico	Record low minimum temperature	11.7 C (53.1 F)	34 of 100 (Routine)
Verhneimbatsk	Russia	Record low minimum temperature	-12.6 C (9.3 F)	34 of 100 (Routine)
Federal Pt	United States	Record high minimum temperature	23.3 C (73.9 F)	34 of 100 (Routine)
Osceola	United States	Record high minimum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Kioloa Old Post Office	Australia	Record daily precipitation	77.8 mm (3.1 in)	33 of 100 (Routine)
San Miguel Ejutla	Mexico	Record high maximum temperature	36.7 C (98.1 F)	33 of 100 (Routine)
Plevna	United States	Record high minimum temperature	21.1 C (70.0 F)	33 of 100 (Routine)
Hiroo	Japan	Record high minimum temperature	16.0 C (60.8 F)	32 of 100 (Routine)
Acambaro	Mexico	Record high maximum temperature	37.8 C (100.0 F)	32 of 100 (Routine)
Redwood Falls Muni AP	United States	Record high maximum temperature	37.8 C (100.0 F)	32 of 100 (Routine)
Glenorie (Old Northern Rd)	Australia	Record daily precipitation	58.0 mm (2.3 in)	31 of 100 (Routine)
Tonala (Dge)	Mexico	Record high minimum temperature	30.6 C (87.1 F)	31 of 100 (Routine)
Cerralvo (Dge)	Mexico	Record low minimum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Miahuatlan (Smn)	Mexico	Record low minimum temperature	8.9 C (48.0 F)	31 of 100 (Routine)
Eucla	Australia	Record high maximum temperature	31.7 C (89.1 F)	30 of 100 (Routine)
Burketown Post Office	Australia	Record high minimum temperature	23.9 C (75.0 F)	30 of 100 (Routine)
Forbes (Camp Street)	Australia	Record daily precipitation	42.8 mm (1.7 in)	30 of 100 (Routine)

Counts by Type and Timescale

1,060 records

Records set or tied on 18 May 1998 by type: Highest daily maximum 392, Lowest daily maximum 59, Highest daily minimum 305, Lowest daily minimum 171, Heaviest daily rainfall 133.

Records on 18 May 1998 by type
Record type	Records
Highest daily maximum	392
Lowest daily maximum	59
Highest daily minimum	305
Lowest daily minimum	171
Heaviest daily rainfall	133
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 May 1998 by timescale: all-time 4, monthly 32, daily 1,024.

How Much Records Were Beaten By

749 broken records

Margins by which the 749 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 62.1. Ties are not counted.

Top 20 by Significance

18 May 1998

Top 20 records on 18 May 1998 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1998	Kherson, UA	daily rain	100.1 mm (3.9 in)	62.1 mm (2.4 in)	107 years	80 of 100 (Exceptional)
18 May 1998	Willow City, US	daily rain	42.4 mm (1.7 in)	20.3 mm (0.8 in)	80 years	53 of 100 (Notable)
18 May 1998	Upham 3 N, US	daily rain	43.4 mm (1.7 in)	28.9 mm (1.1 in)	48 years	52 of 100 (Notable)
18 May 1998	Wilmington 7 N, US	daily rain	74.9 mm (2.9 in)	51.5 mm (2.0 in)	35 years	47 of 100 (Notable)
18 May 1998	Raymond Terrace (Wallaroo Stat, AU	daily rain	88.2 mm (3.5 in)	48.2 mm (1.9 in)	24 years	46 of 100 (Notable)
18 May 1998	Bjorkasen, NO	daily rain	44.6 mm (1.8 in)	27.3 mm (1.1 in)	11 years	46 of 100 (Notable)
18 May 1998	Krakmo, NO	daily rain	33.3 mm (1.3 in)	10.4 mm (0.4 in)	64 years	45 of 100 (Notable)
18 May 1998	New London, US	daily high max	35.0 C (95.0 F)	3.9 C (7.0 F)	96 years	45 of 100 (Notable)
18 May 1998	Mount Kuring-Gai (Ledora Farm), AU	daily rain	84.0 mm (3.3 in)	50.0 mm (2.0 in)	24 years	44 of 100 (Notable)
18 May 1998	Rosalia, US	daily low max	7.2 C (45.0 F)	2.2 C (4.0 F)	104 years	44 of 100 (Notable)
18 May 1998	Wondalli, AU	daily rain	65.0 mm (2.6 in)	11.4 mm (0.4 in)	84 years	42 of 100 (Notable)
18 May 1998	Hanty-Mansijsk, RU	daily low min	-7.6 C (18.3 F)	1.3 C (2.3 F)	98 years	41 of 100 (Notable)
18 May 1998	Lebanon 2W, US	daily high min	20.6 C (69.1 F)	0.6 C (1.1 F)	101 years	41 of 100 (Notable)
18 May 1998	Sisseton, US	daily high min	20.0 C (68.0 F)	1.7 C (3.1 F)	96 years	41 of 100 (Notable)
18 May 1998	Salisbury (Barrington Wilderne, AU	daily rain	69.8 mm (2.7 in)	55.8 mm (2.2 in)	8 years	40 of 100 (Notable)
18 May 1998	Richmond Raaf, AU	daily rain	77.0 mm (3.0 in)	47.0 mm (1.9 in)	0 years	40 of 100 (Notable)
18 May 1998	Waycross 4 NE, US	daily high min	21.7 C (71.1 F)	0.6 C (1.1 F)	97 years	40 of 100 (Notable)
18 May 1998	Berowra (Goodwyn Road), AU	daily rain	72.0 mm (2.8 in)	38.5 mm (1.5 in)	24 years	39 of 100 (Notable)
18 May 1998	Collegeville St John's, US	daily high min	18.3 C (64.9 F)	0.5 C (0.9 F)	95 years	39 of 100 (Notable)
18 May 1998	Auburn 5 ESE, US	daily high max	35.6 C (96.1 F)	1.7 C (3.1 F)	87 years	39 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

1796 to 1998

Records set or tied on this calendar date in each year from 1796 to 1998. 1998 had 1,060 records.

Counts for years before the ledger starts come from the same station rules.

Records on 05-18 in each year
Year	Records
1796	1
1798	1
1802	2
1832	1
1833	1
1845	1
1847	1
1848	1
1855	1
1859	1
1861	2
1863	3
1864	1
1866	2
1868	2
1869	1
1870	1
1871	2
1872	1
1874	2
1877	4
1878	1
1879	1
1881	1
1883	2
1884	2
1885	1
1887	1
1888	4
1889	2
1891	1
1893	2
1894	4
1895	5
1896	2
1897	2
1898	1
1899	1
1900	13
1901	6
1902	9
1903	7
1904	11
1905	2
1906	24
1907	18
1908	5
1909	12
1910	50
1911	64
1912	5
1913	11
1914	45
1915	55
1916	74
1917	30
1918	42
1919	30
1920	26
1921	41
1922	33
1923	61
1924	92
1925	220
1926	133
1927	180
1928	160
1929	193
1930	475
1931	191
1932	460
1933	380
1934	390
1935	400
1936	282
1937	348
1938	382
1939	169
1940	315
1941	334
1942	421
1943	744
1944	496
1945	706
1946	651
1947	231
1948	426
1949	597
1950	473
1951	279
1952	493
1953	393
1954	498
1955	848
1956	795
1957	595
1958	334
1959	435
1960	404
1961	187
1962	1,199
1963	477
1964	329
1965	345
1966	438
1967	410
1968	817
1969	865
1970	703
1971	666
1972	499
1973	1,233
1974	1,097
1975	383
1976	733
1977	1,126
1978	1,090
1979	399
1980	614
1981	1,218
1982	452
1983	1,093
1984	717
1985	498
1986	1,131
1987	823
1988	1,154
1989	721
1990	753
1991	1,218
1992	921
1993	707
1994	1,015
1995	1,849
1996	1,767
1997	1,115
1998	1,060
1999	584
2000	922
2001	898
2002	1,833
2003	1,270
2004	847
2005	630
2006	1,493
2007	1,133
2008	999
2009	1,368
2010	894
2011	1,406
2012	523
2013	816
2014	609
2015	785
2016	597
2017	1,855
2018	557
2019	810
2020	706
2021	418
2022	711
2023	554
2024	551
2025	619
2026	1,131

Download the Data

Data for records on 1998-05-18: 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 10	705
10 to 20	25
20 to 30	8
30 to 40	2
40 to 50	5
50 to 60	3
60 to 70	1