Weather Records on 18 May 1968

817 weather records were set or tied worldwide on 18 May 1968. Highest significance: Cape Northumberland, AU.

Key Facts for 18 May 1968

On 18 May 1968, 817 weather records were set or tied at long-record stations worldwide.
49 were record highs and 430 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 12 monthly and 805 daily.
Cape Northumberland set a daily record precipitation of 38.6 mm (1.5 in) on 18 May 1968.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 440 records.

Record Map

817 stations

817 station records on 18 May 1968 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1968: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cape Northumberland	Australia	Record daily precipitation	38.6 mm (1.5 in)	72 of 100 (Major)
Maitland (Weetulta)	Australia	Record daily precipitation	29.7 mm (1.2 in)	53 of 100 (Notable)
Coutinho	Brazil	Record daily precipitation	56.5 mm (2.2 in)	49 of 100 (Notable)
Pascagoula 3 NE	United States	Record daily precipitation	103.4 mm (4.1 in)	49 of 100 (Notable)
Mogoca	Russia	Record daily precipitation	44.3 mm (1.7 in)	48 of 100 (Notable)
Sao Joao Do Jaguaribe	Brazil	Record daily precipitation	73.2 mm (2.9 in)	47 of 100 (Notable)
Erofej Pavlovic	Russia	Record daily precipitation	27.2 mm (1.1 in)	47 of 100 (Notable)
Svenska Hogarna	Sweden	Record daily precipitation	25.7 mm (1.0 in)	47 of 100 (Notable)
Old Noarlunga Post Office	Australia	Record daily precipitation	25.7 mm (1.0 in)	46 of 100 (Notable)
Graca	Brazil	Record daily precipitation	173.0 mm (6.8 in)	45 of 100 (Notable)
Independencia	Brazil	Record daily precipitation	73.0 mm (2.9 in)	45 of 100 (Notable)
Araripe	Brazil	Record daily precipitation	42.5 mm (1.7 in)	45 of 100 (Notable)
Deniliquin (Wilkinson St)	Australia	Record low maximum temperature	10.6 C (51.1 F)	44 of 100 (Notable)
Jaguaruana	Brazil	Record daily precipitation	66.0 mm (2.6 in)	44 of 100 (Notable)
Morada Nova	Brazil	Record daily precipitation	59.0 mm (2.3 in)	44 of 100 (Notable)
Malye Derbety	Russia	Record daily precipitation	33.4 mm (1.3 in)	44 of 100 (Notable)
Tamboril	Brazil	Record daily precipitation	48.0 mm (1.9 in)	43 of 100 (Notable)
Crateus	Brazil	Record daily precipitation	81.3 mm (3.2 in)	41 of 100 (Notable)
Picos	Brazil	Record daily precipitation	31.7 mm (1.2 in)	41 of 100 (Notable)
Uppsala_Aut	Sweden	Record low maximum temperature	7.0 C (44.6 F)	40 of 100 (Notable)
Evergreen	United States	Record daily precipitation	42.7 mm (1.7 in)	39 of 100 (Notable)
Clear Lake	United States	Record daily snowfall	7.6 cm (3.0 in)	39 of 100 (Notable)
Highland Home	United States	Record daily precipitation	54.4 mm (2.1 in)	38 of 100 (Notable)
Alapaha Exp STN	United States	Record daily precipitation	42.2 mm (1.7 in)	38 of 100 (Notable)
Sulphur Springs	United States	Record low maximum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Berlin-Dahlem	Germany	Record low maximum temperature	9.1 C (48.4 F)	36 of 100 (Notable)
Langdon Exp Farm	United States	Record daily snowfall	5.1 cm (2.0 in)	36 of 100 (Notable)
Eureka	United States	Record daily snowfall	5.1 cm (2.0 in)	36 of 100 (Notable)
Cristais	Brazil	Record daily precipitation	54.0 mm (2.1 in)	35 of 100 (Notable)
Bodocongo	Brazil	Record daily precipitation	32.5 mm (1.3 in)	35 of 100 (Notable)
Morden Cda	Canada	Record daily snowfall	7.6 cm (3.0 in)	35 of 100 (Notable)
Zagreb-Gric	Croatia	Record low maximum temperature	10.6 C (51.1 F)	35 of 100 (Notable)
Matehuala (Smn)	Mexico	Record daily precipitation	35.8 mm (1.4 in)	35 of 100 (Notable)
Warren 2 ENE	United States	Record low maximum temperature	17.8 C (64.0 F)	35 of 100 (Notable)
Sparta 1 W	United States	Record low minimum temperature	3.9 C (39.0 F)	35 of 100 (Notable)
Red Lake Indian Agcy	United States	Record low maximum temperature	4.4 C (39.9 F)	34 of 100 (Routine)
Taua	Brazil	Record daily precipitation	78.2 mm (3.1 in)	33 of 100 (Routine)
Crato	Brazil	Record daily precipitation	45.0 mm (1.8 in)	33 of 100 (Routine)
Brandon Cda	Canada	Record low maximum temperature	4.4 C (39.9 F)	33 of 100 (Routine)
Athens	United States	Record daily precipitation	37.3 mm (1.5 in)	33 of 100 (Routine)
Lumpkin 2 SE	United States	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Greencastle 1 W	United States	Record low maximum temperature	11.7 C (53.1 F)	33 of 100 (Routine)
Willow Sprg Radio Kuku	United States	Record low minimum temperature	2.8 C (37.0 F)	33 of 100 (Routine)
Anadarko 3 E	United States	Record low minimum temperature	6.7 C (44.1 F)	33 of 100 (Routine)
Marlow 1 WSW	United States	Record low minimum temperature	6.7 C (44.1 F)	33 of 100 (Routine)
Cape Grim (Woolnorth)	Australia	Record daily precipitation	27.9 mm (1.1 in)	32 of 100 (Routine)
Acude General Sampaio	Brazil	Record daily precipitation	42.0 mm (1.7 in)	32 of 100 (Routine)
Soledade (Ibiapinopolis)	Brazil	Record daily precipitation	37.2 mm (1.5 in)	32 of 100 (Routine)
Tahlequah	United States	Record low minimum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Gainesville	United States	Record low minimum temperature	7.8 C (46.0 F)	32 of 100 (Routine)
Acude Santo Antonio de Russas	Brazil	Record daily precipitation	44.2 mm (1.7 in)	31 of 100 (Routine)
Iapi	Brazil	Record daily precipitation	30.3 mm (1.2 in)	31 of 100 (Routine)
Moultrie 2 ESE	United States	Record daily precipitation	43.2 mm (1.7 in)	31 of 100 (Routine)
Sheldon	United States	Record low minimum temperature	0.0 C (32.0 F)	31 of 100 (Routine)
Birch Tree	United States	Record low minimum temperature	2.2 C (36.0 F)	31 of 100 (Routine)
Gilmer 4 WNW	United States	Record low maximum temperature	18.3 C (64.9 F)	31 of 100 (Routine)
Marshall	United States	Record low maximum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Sulphur Springs	United States	Record low minimum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Liffey	Australia	Record daily precipitation	30.0 mm (1.2 in)	30 of 100 (Routine)
Salvacao	Brazil	Record daily precipitation	45.2 mm (1.8 in)	30 of 100 (Routine)

Counts by Type and Timescale

817 records

Records set or tied on 18 May 1968 by type: Highest daily maximum 15, Lowest daily maximum 232, Highest daily minimum 34, Lowest daily minimum 198, Heaviest daily rainfall 314, Heaviest daily snowfall 20, Deepest snow cover 4.

Records on 18 May 1968 by type
Record type	Records
Highest daily maximum	15
Lowest daily maximum	232
Highest daily minimum	34
Lowest daily minimum	198
Heaviest daily rainfall	314
Heaviest daily snowfall	20
Deepest snow cover	4

Records on 18 May 1968 by timescale: all-time 0, monthly 12, daily 805.

How Much Records Were Beaten By

695 broken records

Margins by which the 695 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 160.0. Ties are not counted.

Top 20 by Significance

18 May 1968

Top 20 records on 18 May 1968 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1968	Cape Northumberland, AU	daily rain	38.6 mm (1.5 in)	23.1 mm (0.9 in)	81 years	72 of 100 (Major)
18 May 1968	Maitland (Weetulta), AU	daily rain	29.7 mm (1.2 in)	14.5 mm (0.6 in)	73 years	53 of 100 (Notable)
18 May 1968	Coutinho, BR	daily rain	56.5 mm (2.2 in)	51.3 mm (2.0 in)	20 years	49 of 100 (Notable)
18 May 1968	Pascagoula 3 NE, US	daily rain	103.4 mm (4.1 in)	83.6 mm (3.3 in)	10 years	49 of 100 (Notable)
18 May 1968	Mogoca, RU	daily rain	44.3 mm (1.7 in)	23.1 mm (0.9 in)	13 years	48 of 100 (Notable)
18 May 1968	Sao Joao Do Jaguaribe, BR	daily rain	73.2 mm (2.9 in)	43.2 mm (1.7 in)	47 years	47 of 100 (Notable)
18 May 1968	Erofej Pavlovic, RU	daily rain	27.2 mm (1.1 in)	19.5 mm (0.8 in)	29 years	47 of 100 (Notable)
18 May 1968	Svenska Hogarna, SE	daily rain	25.7 mm (1.0 in)	8.8 mm (0.35 in)	55 years	47 of 100 (Notable)
18 May 1968	Old Noarlunga Post Office, AU	daily rain	25.7 mm (1.0 in)	10.7 mm (0.4 in)	68 years	46 of 100 (Notable)
18 May 1968	Graca, BR	monthly rain	173.0 mm (6.8 in)	63.5 mm (2.5 in)	0 years	45 of 100 (Notable)
18 May 1968	Independencia, BR	monthly rain	73.0 mm (2.9 in)	16.5 mm (0.6 in)	51 years	45 of 100 (Notable)
18 May 1968	Araripe, BR	daily rain	42.5 mm (1.7 in)	29.5 mm (1.2 in)	44 years	45 of 100 (Notable)
18 May 1968	Deniliquin (Wilkinson St), AU	daily low max	10.6 C (51.1 F)	1.6 C (2.9 F)	102 years	44 of 100 (Notable)
18 May 1968	Jaguaruana, BR	daily rain	66.0 mm (2.6 in)	34.2 mm (1.3 in)	51 years	44 of 100 (Notable)
18 May 1968	Morada Nova, BR	daily rain	59.0 mm (2.3 in)	37.7 mm (1.5 in)	47 years	44 of 100 (Notable)
18 May 1968	Malye Derbety, RU	daily rain	33.4 mm (1.3 in)	31.1 mm (1.2 in)	4 years	44 of 100 (Notable)
18 May 1968	Tamboril, BR	daily rain	48.0 mm (1.9 in)	34.7 mm (1.4 in)	50 years	43 of 100 (Notable)
18 May 1968	Crateus, BR	monthly rain	81.3 mm (3.2 in)	14.8 mm (0.6 in)	42 years	41 of 100 (Notable)
18 May 1968	Picos, BR	daily rain	31.7 mm (1.2 in)	27.4 mm (1.1 in)	44 years	41 of 100 (Notable)
18 May 1968	Uppsala_Aut, SE	daily low max	7.0 C (44.6 F)	0.2 C (0.4 F)	106 years	40 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 1968

Records set or tied on this calendar date in each year from 1796 to 1968. 1968 had 817 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 1968-05-18: 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 20	652
20 to 40	30
40 to 60	7
60 to 80	3
80 to 100	1
100 to 120	0
120 to 140	0
140 to 160	2