Weather Records on 18 May 1963

477 weather records were set or tied worldwide on 18 May 1963. Highest significance: Hambledon Mill Csr, AU.

Key Facts for 18 May 1963

On 18 May 1963, 477 weather records were set or tied at long-record stations worldwide.
128 were record highs and 28 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 18 monthly and 459 daily.
Hambledon Mill Csr set a daily record precipitation of 79.2 mm (3.1 in) on 18 May 1963.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 442 records.

Record Map

477 stations

477 station records on 18 May 1963 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hambledon Mill Csr	Australia	Record daily precipitation	79.2 mm (3.1 in)	64 of 100 (Major)
Neilrex (Caigan)	Australia	Record daily precipitation	65.0 mm (2.6 in)	62 of 100 (Major)
Merriwa (Gummun Place)	Australia	Record daily precipitation	50.3 mm (2.0 in)	61 of 100 (Major)
Merriwa (Terragong)	Australia	Record daily precipitation	50.8 mm (2.0 in)	61 of 100 (Major)
Millaa Millaa Post Office	Australia	Record daily precipitation	116.3 mm (4.6 in)	60 of 100 (Major)
Cardwell Marine Pde	Australia	Record daily precipitation	205.7 mm (8.1 in)	60 of 100 (Major)
Mossman Post Office	Australia	Record daily precipitation	111.8 mm (4.4 in)	59 of 100 (Notable)
Mowbray	Australia	Record daily precipitation	145.3 mm (5.7 in)	59 of 100 (Notable)
Long Pocket	Australia	Record daily precipitation	90.2 mm (3.6 in)	58 of 100 (Notable)
Bierbank	Australia	Record daily precipitation	64.8 mm (2.6 in)	56 of 100 (Notable)
Tully Sugar Mill	Australia	Record daily precipitation	258.6 mm (10.2 in)	55 of 100 (Notable)
Tuni	India	Record daily precipitation	82.5 mm (3.2 in)	55 of 100 (Notable)
Mossman South Alchera Drive	Australia	Record daily precipitation	112.0 mm (4.4 in)	54 of 100 (Notable)
Mossman Central Mill	Australia	Record daily precipitation	129.8 mm (5.1 in)	53 of 100 (Notable)
Mount Molloy Post Office	Australia	Record daily precipitation	77.5 mm (3.1 in)	52 of 100 (Notable)
Wanaaring (Yamba)	Australia	Record daily precipitation	53.1 mm (2.1 in)	52 of 100 (Notable)
Ashley (the Prairies)	Australia	Record daily precipitation	63.5 mm (2.5 in)	52 of 100 (Notable)
Lnai Culture & Heritage Ctr	United States	Record daily precipitation	103.6 mm (4.1 in)	51 of 100 (Notable)
Aberdeen (Main Rd)	Australia	Record daily precipitation	37.8 mm (1.5 in)	50 of 100 (Notable)
Canowindra (Canowindra Street)	Australia	Record daily precipitation	31.0 mm (1.2 in)	50 of 100 (Notable)
Narooma Rvcp	Australia	Record daily precipitation	88.4 mm (3.5 in)	50 of 100 (Notable)
Bloserville 1 N	United States	Record daily precipitation	72.9 mm (2.9 in)	50 of 100 (Notable)
Glenara	Australia	Record daily precipitation	52.1 mm (2.1 in)	48 of 100 (Notable)
Port Douglas - Warner St	Australia	Record daily precipitation	61.2 mm (2.4 in)	47 of 100 (Notable)
Cresson 2 SE	United States	Record daily precipitation	44.5 mm (1.8 in)	47 of 100 (Notable)
Halifax Macrossan St	Australia	Record daily precipitation	59.4 mm (2.3 in)	46 of 100 (Notable)
Greeneville Exp STN	United States	Record daily precipitation	38.1 mm (1.5 in)	46 of 100 (Notable)
Madison 3NNW	United States	Record daily precipitation	48.5 mm (1.9 in)	46 of 100 (Notable)
Greenvale	Australia	Record daily precipitation	45.2 mm (1.8 in)	45 of 100 (Notable)
Clarke River Telecom	Australia	Record daily precipitation	50.8 mm (2.0 in)	44 of 100 (Notable)
Narrawa (Hollywood)	Australia	Record daily precipitation	36.6 mm (1.4 in)	44 of 100 (Notable)
Greenethorpe (Iandra)	Australia	Record daily precipitation	74.4 mm (2.9 in)	44 of 100 (Notable)
Darlington Point (Tubbo)	Australia	Record daily precipitation	37.1 mm (1.5 in)	43 of 100 (Notable)
Minsk	Belarus	Record daily precipitation	61.8 mm (2.4 in)	43 of 100 (Notable)
Macknade Sugar Mill	Australia	Record daily precipitation	67.3 mm (2.6 in)	42 of 100 (Notable)
Tarago (Kildare)	Australia	Record daily precipitation	34.3 mm (1.4 in)	42 of 100 (Notable)
Barnawartha	Australia	Record daily precipitation	36.1 mm (1.4 in)	42 of 100 (Notable)
Greenville	United States	Record daily precipitation	51.8 mm (2.0 in)	42 of 100 (Notable)
Malanda Post Office	Australia	Record daily precipitation	42.2 mm (1.7 in)	41 of 100 (Notable)
Shottery	Australia	Record daily precipitation	41.4 mm (1.6 in)	41 of 100 (Notable)
Yungaburra	Australia	Record daily precipitation	44.7 mm (1.8 in)	41 of 100 (Notable)
Ouricuri	Brazil	Record daily precipitation	50.0 mm (2.0 in)	41 of 100 (Notable)
Fayetteville (Pwc)	United States	Record daily precipitation	46.2 mm (1.8 in)	39 of 100 (Notable)
Cassilis Post Office	Australia	Record daily precipitation	30.5 mm (1.2 in)	38 of 100 (Notable)
Masset Airport	Canada	Record high maximum temperature	24.4 C (75.9 F)	38 of 100 (Notable)
Manchester 4 W	United States	Record daily precipitation	52.6 mm (2.1 in)	38 of 100 (Notable)
Portales	United States	Record daily precipitation	46.5 mm (1.8 in)	38 of 100 (Notable)
Kairi Research Station	Australia	Record daily precipitation	51.3 mm (2.0 in)	37 of 100 (Notable)
Durham Downs	Australia	Record daily precipitation	29.5 mm (1.2 in)	37 of 100 (Notable)
White River	Canada	Record daily precipitation	30.0 mm (1.2 in)	37 of 100 (Notable)
Princess Anne	United States	Record daily precipitation	60.2 mm (2.4 in)	37 of 100 (Notable)
Griffiss AFB	United States	Record daily precipitation	29.2 mm (1.1 in)	37 of 100 (Notable)
Gadgarra Forest Reserve	Australia	Record daily precipitation	71.9 mm (2.8 in)	36 of 100 (Notable)
Gleneagle	Australia	Record daily precipitation	85.1 mm (3.4 in)	36 of 100 (Notable)
Cassilis (Dalkeith)	Australia	Record daily precipitation	25.4 mm (1.0 in)	36 of 100 (Notable)
Morganton	United States	Record daily precipitation	50.5 mm (2.0 in)	36 of 100 (Notable)
Murringo (Windermere)	Australia	Record daily precipitation	28.7 mm (1.1 in)	35 of 100 (Notable)
Altoona Horseshoe Curv	United States	Record daily precipitation	57.9 mm (2.3 in)	35 of 100 (Notable)
Beckley Va Hospital	United States	Record daily precipitation	33.5 mm (1.3 in)	35 of 100 (Notable)
Portland Rfc City	United States	Record high maximum temperature	33.3 C (91.9 F)	35 of 100 (Notable)

Counts by Type and Timescale

477 records

Records set or tied on 18 May 1963 by type: Highest daily maximum 73, Lowest daily maximum 13, Highest daily minimum 55, Lowest daily minimum 15, Heaviest daily rainfall 316, Heaviest daily snowfall 5.

Records on 18 May 1963 by type
Record type	Records
Highest daily maximum	73
Lowest daily maximum	13
Highest daily minimum	55
Lowest daily minimum	15
Heaviest daily rainfall	316
Heaviest daily snowfall	5
Deepest snow cover	0

Records on 18 May 1963 by timescale: all-time 0, monthly 18, daily 459.

How Much Records Were Beaten By

396 broken records

Margins by which the 396 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 103.2. Ties are not counted.

Top 20 by Significance

18 May 1963

Top 20 records on 18 May 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1963	Hambledon Mill Csr, AU	daily rain	79.2 mm (3.1 in)	39.6 mm (1.6 in)	61 years	64 of 100 (Major)
18 May 1963	Neilrex (Caigan), AU	daily rain	65.0 mm (2.6 in)	54.8 mm (2.2 in)	48 years	62 of 100 (Major)
18 May 1963	Merriwa (Gummun Place), AU	daily rain	50.3 mm (2.0 in)	40.1 mm (1.6 in)	62 years	61 of 100 (Major)
18 May 1963	Merriwa (Terragong), AU	daily rain	50.8 mm (2.0 in)	32.3 mm (1.3 in)	70 years	61 of 100 (Major)
18 May 1963	Millaa Millaa Post Office, AU	monthly rain	116.3 mm (4.6 in)	39.6 mm (1.6 in)	42 years	60 of 100 (Major)
18 May 1963	Cardwell Marine Pde, AU	monthly rain	205.7 mm (8.1 in)	38.6 mm (1.5 in)	43 years	60 of 100 (Major)
18 May 1963	Mossman Post Office, AU	monthly rain	111.8 mm (4.4 in)	40.7 mm (1.6 in)	17 years	59 of 100 (Notable)
18 May 1963	Mowbray, AU	monthly rain	145.3 mm (5.7 in)	64.0 mm (2.5 in)	17 years	59 of 100 (Notable)
18 May 1963	Long Pocket, AU	monthly rain	90.2 mm (3.6 in)	47.0 mm (1.9 in)	17 years	58 of 100 (Notable)
18 May 1963	Bierbank, AU	daily rain	64.8 mm (2.6 in)	58.4 mm (2.3 in)	30 years	56 of 100 (Notable)
18 May 1963	Tully Sugar Mill, AU	monthly rain	258.6 mm (10.2 in)	103.2 mm (4.1 in)	7 years	55 of 100 (Notable)
18 May 1963	Tuni, IN	daily rain	82.5 mm (3.2 in)	66.0 mm (2.6 in)	30 years	55 of 100 (Notable)
18 May 1963	Mossman South Alchera Drive, AU	daily rain	112.0 mm (4.4 in)	85.1 mm (3.4 in)	30 years	54 of 100 (Notable)
18 May 1963	Mossman Central Mill, AU	daily rain	129.8 mm (5.1 in)	101.4 mm (4.0 in)	28 years	53 of 100 (Notable)
18 May 1963	Mount Molloy Post Office, AU	monthly rain	77.5 mm (3.1 in)	21.4 mm (0.8 in)	27 years	52 of 100 (Notable)
18 May 1963	Wanaaring (Yamba), AU	daily rain	53.1 mm (2.1 in)	48.5 mm (1.9 in)	30 years	52 of 100 (Notable)
18 May 1963	Ashley (the Prairies), AU	daily rain	63.5 mm (2.5 in)	63.5 mm (2.5 in)	34 years	52 of 100 (Notable)
18 May 1963	Lnai Culture & Heritage Ctr, US	daily rain	103.6 mm (4.1 in)	92.2 mm (3.6 in)	28 years	51 of 100 (Notable)
18 May 1963	Aberdeen (Main Rd), AU	daily rain	37.8 mm (1.5 in)	29.4 mm (1.2 in)	62 years	50 of 100 (Notable)
18 May 1963	Canowindra (Canowindra Street), AU	daily rain	31.0 mm (1.2 in)	15.3 mm (0.6 in)	76 years	50 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 1963

Records set or tied on this calendar date in each year from 1796 to 1963. 1963 had 477 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 1963-05-18: 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	331
20 to 40	44
40 to 60	12
60 to 80	5
80 to 100	2
100 to 120	2