Weather Records on 18 May 2001

898 weather records were set or tied worldwide on 18 May 2001. Highest significance: Port Clinton (Yararoo), AU.

Key Facts for 18 May 2001

On 18 May 2001, 898 weather records were set or tied at long-record stations worldwide.
424 were record highs and 141 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 39 monthly and 858 daily.
Port Clinton (Yararoo) set a daily record precipitation of 34.0 mm (1.3 in) on 18 May 2001.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 440 records.

Record Map

898 stations

898 station records on 18 May 2001 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 2001: highest significance records shown on the map
Station	Country	Type	Value	Significance
Port Clinton (Yararoo)	Australia	Record daily precipitation	34.0 mm (1.3 in)	72 of 100 (Major)
Happy Valley Reservoir	Australia	Record daily precipitation	46.0 mm (1.8 in)	71 of 100 (Major)
Ylistaro Asemanseutu	Finland	Record daily precipitation	39.6 mm (1.6 in)	61 of 100 (Major)
Two Wells	Australia	Record daily precipitation	25.8 mm (1.0 in)	59 of 100 (Notable)
Victor Harbor Comparison	Australia	Record daily precipitation	49.6 mm (2.0 in)	59 of 100 (Notable)
Verhnjaja Gutara	Russia	Record daily precipitation	31.6 mm (1.2 in)	58 of 100 (Notable)
North Adelaide	Australia	Record daily precipitation	33.0 mm (1.3 in)	55 of 100 (Notable)
Seinajoki Pelmaa	Finland	Record daily precipitation	36.9 mm (1.5 in)	55 of 100 (Notable)
Hindmarsh Valley (Fernbrook)	Australia	Record daily precipitation	61.2 mm (2.4 in)	53 of 100 (Notable)
Adelaide (Seaton)	Australia	Record daily precipitation	35.0 mm (1.4 in)	52 of 100 (Notable)
Smithfield	United States	Record low maximum temperature	15.0 C (59.0 F)	52 of 100 (Notable)
Whitestown	United States	Record daily precipitation	64.5 mm (2.5 in)	51 of 100 (Notable)
Mannford 6 NW	United States	Record daily precipitation	95.3 mm (3.8 in)	51 of 100 (Notable)
Kingfisher	United States	Record daily precipitation	93.7 mm (3.7 in)	50 of 100 (Notable)
Rebriha	Russia	Record daily precipitation	29.6 mm (1.2 in)	49 of 100 (Notable)
Billings	United States	Record daily precipitation	82.6 mm (3.3 in)	49 of 100 (Notable)
Bedford	United States	Record low maximum temperature	13.3 C (55.9 F)	49 of 100 (Notable)
Adelaide (Torrens Island)	Australia	Record daily precipitation	27.6 mm (1.1 in)	48 of 100 (Notable)
Roxboro 7 ESE	United States	Record low maximum temperature	15.0 C (59.0 F)	48 of 100 (Notable)
Ylistaro Kainasto	Finland	Record daily precipitation	35.1 mm (1.4 in)	47 of 100 (Notable)
Decatur 1 N	United States	Record daily precipitation	74.9 mm (2.9 in)	47 of 100 (Notable)
Chapel Hill 2 W	United States	Record low maximum temperature	15.0 C (59.0 F)	47 of 100 (Notable)
Myponga	Australia	Record daily precipitation	47.8 mm (1.9 in)	46 of 100 (Notable)
Utena	Lithuania	Record daily precipitation	32.0 mm (1.3 in)	46 of 100 (Notable)
Kuzedeevo	Russia	Record daily precipitation	29.1 mm (1.1 in)	46 of 100 (Notable)
Louisburg	United States	Record low maximum temperature	16.1 C (61.0 F)	46 of 100 (Notable)
Perry	United States	Record daily precipitation	79.5 mm (3.1 in)	46 of 100 (Notable)
Uraidla	Australia	Record daily precipitation	33.4 mm (1.3 in)	45 of 100 (Notable)
Ermakovskoe	Russia	Record daily precipitation	32.0 mm (1.3 in)	44 of 100 (Notable)
Tahlequah	United States	Record daily precipitation	84.8 mm (3.3 in)	44 of 100 (Notable)
Dale Enterprise	United States	Record low maximum temperature	13.3 C (55.9 F)	44 of 100 (Notable)
Mount Compass	Australia	Record daily precipitation	47.0 mm (1.9 in)	43 of 100 (Notable)
Lonsdale	Australia	Record daily precipitation	41.2 mm (1.6 in)	43 of 100 (Notable)
Voru	Estonia	Record daily precipitation	30.1 mm (1.2 in)	43 of 100 (Notable)
Zinder	Niger	Record daily precipitation	101.1 mm (4.0 in)	43 of 100 (Notable)
Douglas	United States	Record high maximum temperature	37.2 C (99.0 F)	43 of 100 (Notable)
Henderson 2 NNW	United States	Record low maximum temperature	16.1 C (61.0 F)	43 of 100 (Notable)
Durham	United States	Record low maximum temperature	14.4 C (57.9 F)	42 of 100 (Notable)
Mocksville 5SE	United States	Record low maximum temperature	16.7 C (62.1 F)	42 of 100 (Notable)
Adelaide (Thorndon Park)	Australia	Record daily precipitation	25.8 mm (1.0 in)	41 of 100 (Notable)
Victor Harbor (Rivington Grang	Australia	Record daily precipitation	41.4 mm (1.6 in)	41 of 100 (Notable)
Corning	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Warren	United States	Record high minimum temperature	3.9 C (39.0 F)	41 of 100 (Notable)
Olathe 3E	United States	Record daily precipitation	96.3 mm (3.8 in)	41 of 100 (Notable)
Mtn Grove 2 N	United States	Record high maximum temperature	31.7 C (89.1 F)	41 of 100 (Notable)
Anthony	United States	Record daily precipitation	76.7 mm (3.0 in)	41 of 100 (Notable)
Tashkent	Uzbekistan	Record high minimum temperature	21.0 C (69.8 F)	41 of 100 (Notable)
Adelaide (Pooraka)	Australia	Record daily precipitation	28.8 mm (1.1 in)	40 of 100 (Notable)
Lazdijai	Lithuania	Record daily precipitation	26.1 mm (1.0 in)	40 of 100 (Notable)
Adelaide (Morphettville Raceco	Australia	Record daily precipitation	31.0 mm (1.2 in)	39 of 100 (Notable)
Beja	Russia	Record daily precipitation	31.0 mm (1.2 in)	39 of 100 (Notable)
Experiment	United States	Record high minimum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Mt Airy 2 W	United States	Record low maximum temperature	14.4 C (57.9 F)	39 of 100 (Notable)
Yundi	Australia	Record daily precipitation	41.4 mm (1.6 in)	38 of 100 (Notable)
Harrisburg	United States	Record high minimum temperature	21.7 C (71.1 F)	38 of 100 (Notable)
Purcellville	United States	Record low maximum temperature	14.4 C (57.9 F)	38 of 100 (Notable)
Bijsk Zonalnaja	Russia	Record daily precipitation	38.6 mm (1.5 in)	37 of 100 (Notable)
Kokomo 3 WSW	United States	Record daily precipitation	39.9 mm (1.6 in)	37 of 100 (Notable)
Dillon	United States	Record low maximum temperature	20.6 C (69.1 F)	37 of 100 (Notable)
Farmville	United States	Record low maximum temperature	15.0 C (59.0 F)	37 of 100 (Notable)

Counts by Type and Timescale

898 records

Records set or tied on 18 May 2001 by type: Highest daily maximum 172, Lowest daily maximum 93, Highest daily minimum 252, Lowest daily minimum 48, Heaviest daily rainfall 332, Deepest snow cover 1.

Records on 18 May 2001 by type
Record type	Records
Highest daily maximum	172
Lowest daily maximum	93
Highest daily minimum	252
Lowest daily minimum	48
Heaviest daily rainfall	332
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 18 May 2001 by timescale: all-time 1, monthly 39, daily 858.

How Much Records Were Beaten By

710 broken records

Margins by which the 710 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.0. Ties are not counted.

Top 20 by Significance

18 May 2001

Top 20 records on 18 May 2001 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 2001	Port Clinton (Yararoo), AU	daily rain	34.0 mm (1.3 in)	18.8 mm (0.7 in)	100 years	72 of 100 (Major)
18 May 2001	Happy Valley Reservoir, AU	daily rain	46.0 mm (1.8 in)	21.4 mm (0.8 in)	100 years	71 of 100 (Major)
18 May 2001	Ylistaro Asemanseutu, FI	monthly rain	39.6 mm (1.6 in)	14.9 mm (0.6 in)	28 years	61 of 100 (Major)
18 May 2001	Two Wells, AU	daily rain	25.8 mm (1.0 in)	11.1 mm (0.4 in)	100 years	59 of 100 (Notable)
18 May 2001	Victor Harbor Comparison, AU	daily rain	49.6 mm (2.0 in)	25.7 mm (1.0 in)	32 years	59 of 100 (Notable)
18 May 2001	Verhnjaja Gutara, RU	daily rain	31.6 mm (1.2 in)	16.6 mm (0.7 in)	40 years	58 of 100 (Notable)
18 May 2001	North Adelaide, AU	daily rain	33.0 mm (1.3 in)	10.9 mm (0.4 in)	100 years	55 of 100 (Notable)
18 May 2001	Seinajoki Pelmaa, FI	monthly rain	36.9 mm (1.5 in)	15.9 mm (0.6 in)	5 years	55 of 100 (Notable)
18 May 2001	Hindmarsh Valley (Fernbrook), AU	daily rain	61.2 mm (2.4 in)	36.6 mm (1.4 in)	34 years	53 of 100 (Notable)
18 May 2001	Adelaide (Seaton), AU	daily rain	35.0 mm (1.4 in)	14.7 mm (0.6 in)	55 years	52 of 100 (Notable)
18 May 2001	Smithfield, US	daily low max	15.0 C (59.0 F)	5.0 C (9.0 F)	107 years	52 of 100 (Notable)
18 May 2001	Whitestown, US	daily rain	64.5 mm (2.5 in)	22.3 mm (0.9 in)	72 years	51 of 100 (Notable)
18 May 2001	Mannford 6 NW, US	daily rain	95.3 mm (3.8 in)	53.1 mm (2.1 in)	52 years	51 of 100 (Notable)
18 May 2001	Kingfisher, US	daily rain	93.7 mm (3.7 in)	58.9 mm (2.3 in)	20 years	50 of 100 (Notable)
18 May 2001	Rebriha, RU	daily rain	29.6 mm (1.2 in)	24.8 mm (1.0 in)	16 years	49 of 100 (Notable)
18 May 2001	Billings, US	daily rain	82.6 mm (3.3 in)	49.3 mm (1.9 in)	42 years	49 of 100 (Notable)
18 May 2001	Bedford, US	daily low max	13.3 C (55.9 F)	4.5 C (8.1 F)	107 years	49 of 100 (Notable)
18 May 2001	Adelaide (Torrens Island), AU	daily rain	27.6 mm (1.1 in)	12.6 mm (0.5 in)	55 years	48 of 100 (Notable)
18 May 2001	Roxboro 7 ESE, US	daily low max	15.0 C (59.0 F)	3.9 C (7.0 F)	105 years	48 of 100 (Notable)
18 May 2001	Ylistaro Kainasto, FI	monthly rain	35.1 mm (1.4 in)	13.6 mm (0.5 in)	0 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

1796 to 2001

Records set or tied on this calendar date in each year from 1796 to 2001. 2001 had 898 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 2001-05-18: 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	616
10 to 20	63
20 to 30	20
30 to 40	5
40 to 50	2
50 to 60	3
60 to 70	0
70 to 80	1