Weather Records on 20 May 2018

460 weather records were set or tied worldwide on 20 May 2018. Highest significance: Maquoketa, US.

Key Facts for 20 May 2018

On 20 May 2018, 460 weather records were set or tied at long-record stations worldwide.
286 were record highs and 68 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 456 daily.
Maquoketa set a daily record precipitation of 71.1 mm (2.8 in) on 20 May 2018.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 456 records.

Record Map

460 stations

460 station records on 20 May 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Maquoketa	United States	Record daily precipitation	71.1 mm (2.8 in)	80 of 100 (Exceptional)
Crowell	United States	Record daily precipitation	107.2 mm (4.2 in)	67 of 100 (Major)
Steigen	Norway	Record daily precipitation	33.2 mm (1.3 in)	63 of 100 (Major)
Bedford	United States	Record daily precipitation	66.8 mm (2.6 in)	57 of 100 (Notable)
Sortland-Kleiva	Norway	Record daily precipitation	25.1 mm (1.0 in)	56 of 100 (Notable)
Ft Robinson	United States	Record daily precipitation	88.9 mm (3.5 in)	56 of 100 (Notable)
Lingle 2WSW	United States	Record daily precipitation	53.3 mm (2.1 in)	52 of 100 (Notable)
Truscott 3 W	United States	Record daily precipitation	81.3 mm (3.2 in)	50 of 100 (Notable)
Cheikh Larbi Tebessi	Algeria	Record daily precipitation	41.9 mm (1.6 in)	49 of 100 (Notable)
Saint Leo	United States	Record low maximum temperature	23.3 C (73.9 F)	48 of 100 (Notable)
Saint Francis	United States	Record daily precipitation	50.8 mm (2.0 in)	47 of 100 (Notable)
Versailles	United States	Record daily precipitation	50.5 mm (2.0 in)	45 of 100 (Notable)
Arkadelphia 2 N	United States	Record daily precipitation	55.9 mm (2.2 in)	44 of 100 (Notable)
Truman Dam & Rsvr	United States	Record daily precipitation	99.3 mm (3.9 in)	44 of 100 (Notable)
Burukan	Russia	Record high minimum temperature	8.8 C (47.8 F)	43 of 100 (Notable)
Desoto City 8 SW	United States	Record daily precipitation	49.0 mm (1.9 in)	42 of 100 (Notable)
Defiance	United States	Record daily precipitation	30.0 mm (1.2 in)	42 of 100 (Notable)
Spur	United States	Record daily precipitation	63.5 mm (2.5 in)	42 of 100 (Notable)
Rize	Turkey	Record high minimum temperature	19.1 C (66.4 F)	39 of 100 (Notable)
Tahoka	United States	Record daily precipitation	35.6 mm (1.4 in)	38 of 100 (Notable)
Greenville	United States	Record high minimum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Koigorodok	Russia	Record daily precipitation	26.8 mm (1.1 in)	36 of 100 (Notable)
Benton	United States	Record high minimum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Garwin	United States	Record daily precipitation	48.3 mm (1.9 in)	35 of 100 (Notable)
Hattiesburg 5SW	United States	Record high maximum temperature	35.6 C (96.1 F)	35 of 100 (Notable)
Union City Filtration Plt	United States	Record daily precipitation	44.7 mm (1.8 in)	35 of 100 (Notable)
Tampa Intl AP	United States	Record low maximum temperature	24.4 C (75.9 F)	35 of 100 (Notable)
Lakeland Linder Rgnl AP	United States	Record low maximum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Cairo 1SW	United States	Record high minimum temperature	21.7 C (71.1 F)	34 of 100 (Routine)
Walkerton 2 NW	United States	Record high minimum temperature	24.4 C (75.9 F)	34 of 100 (Routine)
Finike	Turkey	Record high minimum temperature	22.7 C (72.9 F)	33 of 100 (Routine)
Saint Charles	United States	Record high minimum temperature	22.8 C (73.0 F)	33 of 100 (Routine)
Lakeside	United States	Record daily precipitation	48.8 mm (1.9 in)	33 of 100 (Routine)
Lexington	United States	Record high minimum temperature	21.1 C (70.0 F)	33 of 100 (Routine)
Smithfield	United States	Record high minimum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Annapolis US Naval Academy Aso	United States	Record high maximum temperature	31.7 C (89.1 F)	33 of 100 (Routine)
Ostergarnsholm_A	Sweden	Record high maximum temperature	19.9 C (67.8 F)	32 of 100 (Routine)
Natitingou	Benin	Record high minimum temperature	25.8 C (78.4 F)	31 of 100 (Routine)
Eggegrund	Sweden	Record high maximum temperature	21.8 C (71.2 F)	31 of 100 (Routine)
Olenja Rechka	Russia	Record low maximum temperature	-3.5 C (25.7 F)	30 of 100 (Routine)
Gudermes	Russia	Record high minimum temperature	20.2 C (68.4 F)	30 of 100 (Routine)
Jayton	United States	Record daily precipitation	47.5 mm (1.9 in)	30 of 100 (Routine)
Chase City	United States	Record high minimum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Richmond Intl AP	United States	Record high minimum temperature	21.7 C (71.1 F)	30 of 100 (Routine)
Dover	United States	Record high minimum temperature	21.7 C (71.1 F)	29 of 100 (Routine)
Lynchburg Rgnl AP	United States	Record high minimum temperature	18.9 C (66.0 F)	29 of 100 (Routine)
Annapolis US Naval Academy Aso	United States	Record high minimum temperature	21.1 C (70.0 F)	29 of 100 (Routine)
Xiamen	China	Record high minimum temperature	25.4 C (77.7 F)	28 of 100 (Routine)
Heyuan	China	Record high minimum temperature	27.0 C (80.6 F)	28 of 100 (Routine)
Temir	Kazakhstan	Record high maximum temperature	34.5 C (94.1 F)	28 of 100 (Routine)
Urdzhar	Kazakhstan	Record low minimum temperature	-1.7 C (28.9 F)	28 of 100 (Routine)
Royal Oak 2 SSW	United States	Record high minimum temperature	21.1 C (70.0 F)	28 of 100 (Routine)
Uw Arboretum - Madison	United States	Record daily precipitation	42.2 mm (1.7 in)	28 of 100 (Routine)
Shanwei	China	Record high minimum temperature	27.3 C (81.1 F)	27 of 100 (Routine)
Alejskaja	Russia	Record low minimum temperature	-2.8 C (27.0 F)	27 of 100 (Routine)
Hialeah	United States	Record low maximum temperature	25.6 C (78.1 F)	27 of 100 (Routine)
Morehead City 2 WNW	United States	Record high minimum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Union 8 S	United States	Record high minimum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Packwood	United States	Record high maximum temperature	32.2 C (90.0 F)	27 of 100 (Routine)
Cherry Point MCAS	United States	Record high minimum temperature	22.8 C (73.0 F)	27 of 100 (Routine)

Counts by Type and Timescale

460 records

Records set or tied on 20 May 2018 by type: Highest daily maximum 67, Lowest daily maximum 45, Highest daily minimum 219, Lowest daily minimum 23, Heaviest daily rainfall 104, Deepest snow cover 2.

Records on 20 May 2018 by type
Record type	Records
Highest daily maximum	67
Lowest daily maximum	45
Highest daily minimum	219
Lowest daily minimum	23
Heaviest daily rainfall	104
Heaviest daily snowfall	0
Deepest snow cover	2

Records on 20 May 2018 by timescale: all-time 0, monthly 4, daily 456.

How Much Records Were Beaten By

341 broken records

Margins by which the 341 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 90.0. Ties are not counted.

Top 20 by Significance

20 May 2018

Top 20 records on 20 May 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 2018	Maquoketa, US	daily rain	71.1 mm (2.8 in)	41.9 mm (1.6 in)	103 years	80 of 100 (Exceptional)
20 May 2018	Crowell, US	daily rain	107.2 mm (4.2 in)	63.3 mm (2.5 in)	76 years	67 of 100 (Major)
20 May 2018	Steigen, NO	daily rain	33.2 mm (1.3 in)	15.9 mm (0.6 in)	76 years	63 of 100 (Major)
20 May 2018	Bedford, US	daily rain	66.8 mm (2.6 in)	36.6 mm (1.4 in)	64 years	57 of 100 (Notable)
20 May 2018	Sortland-Kleiva, NO	daily rain	25.1 mm (1.0 in)	16.7 mm (0.7 in)	57 years	56 of 100 (Notable)
20 May 2018	Ft Robinson, US	monthly rain	88.9 mm (3.5 in)	8.1 mm (0.32 in)	98 years	56 of 100 (Notable)
20 May 2018	Lingle 2WSW, US	daily rain	53.3 mm (2.1 in)	28.9 mm (1.1 in)	59 years	52 of 100 (Notable)
20 May 2018	Truscott 3 W, US	daily rain	81.3 mm (3.2 in)	54.1 mm (2.1 in)	40 years	50 of 100 (Notable)
20 May 2018	Cheikh Larbi Tebessi, DZ	daily rain	41.9 mm (1.6 in)	33.0 mm (1.3 in)	21 years	49 of 100 (Notable)
20 May 2018	Saint Leo, US	daily low max	23.3 C (73.9 F)	3.4 C (6.1 F)	85 years	48 of 100 (Notable)
20 May 2018	Saint Francis, US	daily rain	50.8 mm (2.0 in)	23.6 mm (0.9 in)	83 years	47 of 100 (Notable)
20 May 2018	Versailles, US	daily rain	50.5 mm (2.0 in)	8.6 mm (0.34 in)	122 years	45 of 100 (Notable)
20 May 2018	Arkadelphia 2 N, US	daily rain	55.9 mm (2.2 in)	10.2 mm (0.4 in)	107 years	44 of 100 (Notable)
20 May 2018	Truman Dam & Rsvr, US	daily rain	99.3 mm (3.9 in)	68.1 mm (2.7 in)	4 years	44 of 100 (Notable)
20 May 2018	Burukan, RU	daily high min	8.8 C (47.8 F)	6.6 C (11.9 F)	60 years	43 of 100 (Notable)
20 May 2018	Desoto City 8 SW, US	daily rain	49.0 mm (1.9 in)	11.9 mm (0.5 in)	87 years	42 of 100 (Notable)
20 May 2018	Defiance, US	daily rain	30.0 mm (1.2 in)	2.6 mm (0.10 in)	119 years	42 of 100 (Notable)
20 May 2018	Spur, US	daily rain	63.5 mm (2.5 in)	38.4 mm (1.5 in)	15 years	42 of 100 (Notable)
20 May 2018	Rize, TR	daily high min	19.1 C (66.4 F)	1.9 C (3.4 F)	76 years	39 of 100 (Notable)
20 May 2018	Tahoka, US	daily rain	35.6 mm (1.4 in)	8.7 mm (0.34 in)	76 years	38 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

1802 to 2018

Records set or tied on this calendar date in each year from 1802 to 2018. 2018 had 460 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 2018-05-20: 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 20	328
20 to 40	8
40 to 60	2
60 to 80	2
80 to 100	1