Weather Records on 18 May 2020

706 weather records were set or tied worldwide on 18 May 2020. Highest significance: Sturgeon Bay Exp Farm, US.

Key Facts for 18 May 2020

On 18 May 2020, 706 weather records were set or tied at long-record stations worldwide.
417 were record highs and 53 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 29 monthly and 677 daily.
Sturgeon Bay Exp Farm set a daily record precipitation of 77.5 mm (3.1 in) on 18 May 2020.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 441 records.

Record Map

706 stations

706 station records on 18 May 2020 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 2020: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sturgeon Bay Exp Farm	United States	Record daily precipitation	77.5 mm (3.1 in)	80 of 100 (Exceptional)
Brillion	United States	Record daily precipitation	59.7 mm (2.4 in)	70 of 100 (Major)
Akune	Japan	Record daily precipitation	163.1 mm (6.4 in)	66 of 100 (Major)
Peru	United States	Record daily precipitation	60.5 mm (2.4 in)	66 of 100 (Major)
Grapevine Dam	United States	Record daily precipitation	111.3 mm (4.4 in)	64 of 100 (Major)
Hitoyoshi	Japan	Record daily precipitation	153.9 mm (6.1 in)	60 of 100 (Major)
Joliet Brandon Road Lock/Dam	United States	Record daily precipitation	78.7 mm (3.1 in)	60 of 100 (Major)
Hart 3 WSW	United States	Record daily precipitation	62.2 mm (2.4 in)	60 of 100 (Major)
Traverse Cy Cherry Capital AP	United States	Record daily precipitation	34.5 mm (1.4 in)	59 of 100 (Notable)
E Tawas	United States	Record daily precipitation	77.5 mm (3.1 in)	57 of 100 (Notable)
Appleton	United States	Record daily precipitation	55.9 mm (2.2 in)	56 of 100 (Notable)
Plymouth Wwtp	United States	Record daily precipitation	97.0 mm (3.8 in)	56 of 100 (Notable)
Saginaw Mbs Intl AP	United States	Record daily precipitation	79.2 mm (3.1 in)	56 of 100 (Notable)
Oconto 4 W	United States	Record daily precipitation	68.1 mm (2.7 in)	55 of 100 (Notable)
Oshkosh	United States	Record daily precipitation	81.3 mm (3.2 in)	55 of 100 (Notable)
Vincennes 4 E	United States	Record daily precipitation	68.1 mm (2.7 in)	53 of 100 (Notable)
Tellico Plains	United States	Record daily precipitation	55.9 mm (2.2 in)	53 of 100 (Notable)
Peshtigo	United States	Record daily precipitation	67.6 mm (2.7 in)	53 of 100 (Notable)
Quemado	United States	Record high minimum temperature	18.9 C (66.0 F)	52 of 100 (Notable)
Hancock Exp Farm	United States	Record daily precipitation	53.6 mm (2.1 in)	52 of 100 (Notable)
Three Rivers	United States	Record daily precipitation	43.4 mm (1.7 in)	51 of 100 (Notable)
Morgan	United States	Record high minimum temperature	17.2 C (63.0 F)	51 of 100 (Notable)
Newport	United States	Record daily precipitation	40.4 mm (1.6 in)	51 of 100 (Notable)
Fond du Lac Wwtp	United States	Record daily precipitation	45.5 mm (1.8 in)	51 of 100 (Notable)
Standish 4NE	United States	Record daily precipitation	58.7 mm (2.3 in)	49 of 100 (Notable)
Nimrod Dam	United States	Record daily precipitation	83.1 mm (3.3 in)	48 of 100 (Notable)
Lake City Exp Farm	United States	Record daily precipitation	54.1 mm (2.1 in)	47 of 100 (Notable)
Jack Creek Upper	United States	Record daily precipitation	35.6 mm (1.4 in)	47 of 100 (Notable)
Nome AP	United States	Record high minimum temperature	7.8 C (46.0 F)	47 of 100 (Notable)
Karesuando	Sweden	Record snow depth	63.0 cm (24.8 in)	46 of 100 (Notable)
Pandora	United States	Record daily precipitation	52.3 mm (2.1 in)	46 of 100 (Notable)
Moloaa 1145	United States	Record daily precipitation	30.7 mm (1.2 in)	46 of 100 (Notable)
Cadillac	United States	Record daily precipitation	53.3 mm (2.1 in)	46 of 100 (Notable)
Broken Bow 1 N	United States	Record daily precipitation	71.1 mm (2.8 in)	45 of 100 (Notable)
Estacada 2 SE	United States	Record daily precipitation	28.2 mm (1.1 in)	45 of 100 (Notable)
John Glenn Intl AP	United States	Record daily precipitation	59.2 mm (2.3 in)	45 of 100 (Notable)
Sukumo	Japan	Record daily precipitation	108.5 mm (4.3 in)	44 of 100 (Notable)
Greeneville Exp STN	United States	Record high minimum temperature	21.1 C (70.0 F)	44 of 100 (Notable)
Port Isabel	United States	Record low minimum temperature	15.6 C (60.1 F)	44 of 100 (Notable)
Durand	United States	Record daily precipitation	62.2 mm (2.4 in)	44 of 100 (Notable)
Hastings	United States	Record daily precipitation	62.5 mm (2.5 in)	43 of 100 (Notable)
W Branch 3SE	United States	Record daily precipitation	49.0 mm (1.9 in)	43 of 100 (Notable)
Wibaux 2 E	United States	Record low minimum temperature	-6.7 C (19.9 F)	43 of 100 (Notable)
Ephrata AP	United States	Record daily precipitation	28.2 mm (1.1 in)	43 of 100 (Notable)
Streator 2SE	United States	Record daily precipitation	28.4 mm (1.1 in)	42 of 100 (Notable)
Montague 4 NW	United States	Record daily precipitation	50.8 mm (2.0 in)	42 of 100 (Notable)
Kewaunee	United States	Record daily precipitation	66.0 mm (2.6 in)	42 of 100 (Notable)
Drobeta Turnu Severin	Romania	Record high minimum temperature	17.9 C (64.2 F)	41 of 100 (Notable)
Dequeen	United States	Record daily precipitation	81.8 mm (3.2 in)	41 of 100 (Notable)
Houghton Lake 6 WSW	United States	Record daily precipitation	71.6 mm (2.8 in)	41 of 100 (Notable)
Eureka	United States	Record high minimum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Richmond	United States	Record high minimum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Sutter Hill Cdf	United States	Record daily precipitation	36.1 mm (1.4 in)	40 of 100 (Notable)
Montrose #2	United States	Record high maximum temperature	31.7 C (89.1 F)	40 of 100 (Notable)
Dalian	China	Record daily precipitation	53.3 mm (2.1 in)	39 of 100 (Notable)
Logansport Cicott St	United States	Record daily precipitation	49.5 mm (1.9 in)	39 of 100 (Notable)
Friendship	United States	Record daily precipitation	41.9 mm (1.6 in)	39 of 100 (Notable)
Two Rivers	United States	Record daily precipitation	87.1 mm (3.4 in)	39 of 100 (Notable)
Johnston 4 SW	United States	Record daily precipitation	51.3 mm (2.0 in)	38 of 100 (Notable)
Marinette	United States	Record daily precipitation	55.9 mm (2.2 in)	38 of 100 (Notable)

Counts by Type and Timescale

706 records

Records set or tied on 18 May 2020 by type: Highest daily maximum 160, Lowest daily maximum 29, Highest daily minimum 257, Lowest daily minimum 24, Heaviest daily rainfall 225, Heaviest daily snowfall 1, Deepest snow cover 10.

Records on 18 May 2020 by type
Record type	Records
Highest daily maximum	160
Lowest daily maximum	29
Highest daily minimum	257
Lowest daily minimum	24
Heaviest daily rainfall	225
Heaviest daily snowfall	1
Deepest snow cover	10

Records on 18 May 2020 by timescale: all-time 0, monthly 29, daily 677.

How Much Records Were Beaten By

586 broken records

Margins by which the 586 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 550.0. Ties are not counted.

Top 20 by Significance

18 May 2020

Top 20 records on 18 May 2020 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 2020	Sturgeon Bay Exp Farm, US	daily rain	77.5 mm (3.1 in)	44.0 mm (1.7 in)	102 years	80 of 100 (Exceptional)
18 May 2020	Brillion, US	daily rain	59.7 mm (2.4 in)	38.1 mm (1.5 in)	80 years	70 of 100 (Major)
18 May 2020	Akune, JP	daily rain	163.1 mm (6.4 in)	118.2 mm (4.7 in)	66 years	66 of 100 (Major)
18 May 2020	Peru, US	daily rain	60.5 mm (2.4 in)	37.6 mm (1.5 in)	73 years	66 of 100 (Major)
18 May 2020	Grapevine Dam, US	daily rain	111.3 mm (4.4 in)	63.5 mm (2.5 in)	68 years	64 of 100 (Major)
18 May 2020	Hitoyoshi, JP	daily rain	153.9 mm (6.1 in)	86.2 mm (3.4 in)	66 years	60 of 100 (Major)
18 May 2020	Joliet Brandon Road Lock/Dam, US	daily rain	78.7 mm (3.1 in)	55.3 mm (2.2 in)	46 years	60 of 100 (Major)
18 May 2020	Hart 3 WSW, US	daily rain	62.2 mm (2.4 in)	21.6 mm (0.9 in)	109 years	60 of 100 (Major)
18 May 2020	Traverse Cy Cherry Capital AP, US	daily rain	34.5 mm (1.4 in)	16.5 mm (0.6 in)	118 years	59 of 100 (Notable)
18 May 2020	E Tawas, US	monthly rain	77.5 mm (3.1 in)	6.4 mm (0.25 in)	107 years	57 of 100 (Notable)
18 May 2020	Appleton, US	daily rain	55.9 mm (2.2 in)	30.0 mm (1.2 in)	49 years	56 of 100 (Notable)
18 May 2020	Plymouth Wwtp, US	daily rain	97.0 mm (3.8 in)	57.6 mm (2.3 in)	20 years	56 of 100 (Notable)
18 May 2020	Saginaw Mbs Intl AP, US	daily rain	79.2 mm (3.1 in)	48.7 mm (1.9 in)	20 years	56 of 100 (Notable)
18 May 2020	Oconto 4 W, US	daily rain	68.1 mm (2.7 in)	38.9 mm (1.5 in)	20 years	55 of 100 (Notable)
18 May 2020	Oshkosh, US	daily rain	81.3 mm (3.2 in)	39.9 mm (1.6 in)	20 years	55 of 100 (Notable)
18 May 2020	Vincennes 4 E, US	daily rain	68.1 mm (2.7 in)	17.8 mm (0.7 in)	125 years	53 of 100 (Notable)
18 May 2020	Tellico Plains, US	daily rain	55.9 mm (2.2 in)	17.8 mm (0.7 in)	119 years	53 of 100 (Notable)
18 May 2020	Peshtigo, US	daily rain	67.6 mm (2.7 in)	57.9 mm (2.3 in)	20 years	53 of 100 (Notable)
18 May 2020	Quemado, US	daily high min	18.9 C (66.0 F)	7.8 C (14.0 F)	79 years	52 of 100 (Notable)
18 May 2020	Hancock Exp Farm, US	daily rain	53.6 mm (2.1 in)	13.5 mm (0.5 in)	102 years	52 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 2020

Records set or tied on this calendar date in each year from 1796 to 2020. 2020 had 706 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 2020-05-18: 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 100	582
100 to 200	3
200 to 300	0
300 to 400	0
400 to 500	0
500 to 600	1