Weather Records on 18 May 1978

1,090 weather records were set or tied worldwide on 18 May 1978. Highest significance: Springvale, AU.

Key Facts for 18 May 1978

On 18 May 1978, 1,090 weather records were set or tied at long-record stations worldwide.
197 were record highs and 148 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 41 monthly and 1,047 daily.
Springvale set a daily record precipitation of 57.2 mm (2.3 in) on 18 May 1978.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 438 records.

Record Map

1,090 stations

1,090 station records on 18 May 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Springvale	Australia	Record daily precipitation	57.2 mm (2.3 in)	73 of 100 (Major)
Inglewood (Post Office)	Australia	Record daily precipitation	50.0 mm (2.0 in)	72 of 100 (Major)
Billings Wtp	United States	Record daily precipitation	67.3 mm (2.6 in)	69 of 100 (Major)
Redbank	Australia	Record daily precipitation	57.4 mm (2.3 in)	68 of 100 (Major)
Tullaroop Reservoir	Australia	Record daily precipitation	45.0 mm (1.8 in)	68 of 100 (Major)
Boort	Australia	Record daily precipitation	42.0 mm (1.7 in)	65 of 100 (Major)
Wentworth (Burtundy)	Australia	Record daily precipitation	47.8 mm (1.9 in)	64 of 100 (Major)
Delegate Station	Australia	Record daily precipitation	44.0 mm (1.7 in)	60 of 100 (Major)
Stradbroke Station	Australia	Record daily precipitation	55.0 mm (2.2 in)	59 of 100 (Notable)
Beechal	Australia	Record daily precipitation	34.0 mm (1.3 in)	58 of 100 (Notable)
Mooroopna	Australia	Record daily precipitation	33.2 mm (1.3 in)	58 of 100 (Notable)
Huntley Exp STN	United States	Record daily precipitation	45.2 mm (1.8 in)	58 of 100 (Notable)
Wycheproof (Post Office)	Australia	Record daily precipitation	44.0 mm (1.7 in)	57 of 100 (Notable)
St Arnaud	Australia	Record daily precipitation	57.6 mm (2.3 in)	56 of 100 (Notable)
Knowsley Post Office	Australia	Record daily precipitation	43.0 mm (1.7 in)	56 of 100 (Notable)
Petrolandia (Itaparica)	Brazil	Record daily precipitation	45.0 mm (1.8 in)	56 of 100 (Notable)
Le Bourget	France	Record daily precipitation	35.8 mm (1.4 in)	56 of 100 (Notable)
Broadview	United States	Record daily precipitation	36.3 mm (1.4 in)	56 of 100 (Notable)
Boulia Airport	Australia	Record daily precipitation	32.0 mm (1.3 in)	55 of 100 (Notable)
Tibooburra Post Office	Australia	Record daily precipitation	38.8 mm (1.5 in)	55 of 100 (Notable)
Wanaaring (Thurloo Downs)	Australia	Record daily precipitation	39.4 mm (1.6 in)	55 of 100 (Notable)
Finley Post Office	Australia	Record daily precipitation	44.0 mm (1.7 in)	55 of 100 (Notable)
Ninyeunook	Australia	Record daily precipitation	46.6 mm (1.8 in)	55 of 100 (Notable)
Kerang (Meran Downs)	Australia	Record daily precipitation	34.8 mm (1.4 in)	55 of 100 (Notable)
Mincha	Australia	Record daily precipitation	33.2 mm (1.3 in)	55 of 100 (Notable)
Serpentine (East Loddon)	Australia	Record daily precipitation	41.4 mm (1.6 in)	55 of 100 (Notable)
Casper 2 E	United States	Record daily precipitation	52.3 mm (2.1 in)	55 of 100 (Notable)
Lovell	United States	Record daily precipitation	29.7 mm (1.2 in)	55 of 100 (Notable)
Culgoa	Australia	Record daily precipitation	57.4 mm (2.3 in)	54 of 100 (Notable)
Chaplyne	Ukraine	Record daily precipitation	37.4 mm (1.5 in)	54 of 100 (Notable)
Glenormiston	Australia	Record daily precipitation	25.0 mm (1.0 in)	53 of 100 (Notable)
Wanganella (Bundyulumblah)	Australia	Record daily precipitation	55.2 mm (2.2 in)	53 of 100 (Notable)
St Arnaud (Coonooer Bridge)	Australia	Record daily precipitation	50.2 mm (2.0 in)	53 of 100 (Notable)
Avoca (Post Office)	Australia	Record daily precipitation	41.0 mm (1.6 in)	53 of 100 (Notable)
Bealiba	Australia	Record daily precipitation	46.0 mm (1.8 in)	53 of 100 (Notable)
Groongal (Gundaline)	Australia	Record daily precipitation	38.3 mm (1.5 in)	52 of 100 (Notable)
Quambatook South	Australia	Record daily precipitation	43.0 mm (1.7 in)	52 of 100 (Notable)
Durham Ox	Australia	Record daily precipitation	50.0 mm (2.0 in)	52 of 100 (Notable)
Korong Vale (Post Office)	Australia	Record daily precipitation	47.0 mm (1.9 in)	52 of 100 (Notable)
Natte Yallock	Australia	Record daily precipitation	40.0 mm (1.6 in)	52 of 100 (Notable)
Riverton	United States	Record daily precipitation	41.1 mm (1.6 in)	52 of 100 (Notable)
Pooncarie (Mulurulu Station)	Australia	Record daily precipitation	35.2 mm (1.4 in)	51 of 100 (Notable)
Tocumwal Airport	Australia	Record daily precipitation	40.8 mm (1.6 in)	51 of 100 (Notable)
Wooroonook	Australia	Record daily precipitation	52.0 mm (2.0 in)	51 of 100 (Notable)
Cohuna (Goulburn Murray)	Australia	Record daily precipitation	37.6 mm (1.5 in)	51 of 100 (Notable)
Giffard	Australia	Record daily precipitation	52.8 mm (2.1 in)	51 of 100 (Notable)
Moccasin Exp STN	United States	Record daily precipitation	32.0 mm (1.3 in)	51 of 100 (Notable)
Billings Intl AP	United States	Record daily precipitation	59.4 mm (2.3 in)	51 of 100 (Notable)
Wilcannia (Reid St)	Australia	Record daily precipitation	29.4 mm (1.2 in)	50 of 100 (Notable)
Jerilderie (Pooginook)	Australia	Record daily precipitation	37.5 mm (1.5 in)	50 of 100 (Notable)
Robinvale	Australia	Record daily precipitation	52.2 mm (2.1 in)	50 of 100 (Notable)
Bridgewater (Post Office)	Australia	Record daily precipitation	41.6 mm (1.6 in)	50 of 100 (Notable)
Big Hill Reservoir	Australia	Record daily precipitation	48.5 mm (1.9 in)	50 of 100 (Notable)
Pathfinder Dam	United States	Record daily precipitation	36.8 mm (1.4 in)	50 of 100 (Notable)
Livingston AP	United States	Record daily precipitation	38.1 mm (1.5 in)	50 of 100 (Notable)
Wilcannia (Burndoo Estate)	Australia	Record daily precipitation	40.2 mm (1.6 in)	49 of 100 (Notable)
Tarnagulla	Australia	Record daily precipitation	49.2 mm (1.9 in)	49 of 100 (Notable)
Carisbrook	Australia	Record daily precipitation	35.8 mm (1.4 in)	49 of 100 (Notable)
Novais	Brazil	Record daily precipitation	56.0 mm (2.2 in)	49 of 100 (Notable)
Davenport Downs Station	Australia	Record daily precipitation	50.0 mm (2.0 in)	48 of 100 (Notable)

Counts by Type and Timescale

1,090 records

Records set or tied on 18 May 1978 by type: Highest daily maximum 107, Lowest daily maximum 82, Highest daily minimum 90, Lowest daily minimum 66, Heaviest daily rainfall 732, Heaviest daily snowfall 9, Deepest snow cover 4.

Records on 18 May 1978 by type
Record type	Records
Highest daily maximum	107
Lowest daily maximum	82
Highest daily minimum	90
Lowest daily minimum	66
Heaviest daily rainfall	732
Heaviest daily snowfall	9
Deepest snow cover	4

Records on 18 May 1978 by timescale: all-time 2, monthly 41, daily 1,047.

How Much Records Were Beaten By

957 broken records

Margins by which the 957 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

18 May 1978

Top 20 records on 18 May 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1978	Springvale, AU	daily rain	57.2 mm (2.3 in)	57.2 mm (2.3 in)	83 years	73 of 100 (Major)
18 May 1978	Inglewood (Post Office), AU	daily rain	50.0 mm (2.0 in)	28.4 mm (1.1 in)	91 years	72 of 100 (Major)
18 May 1978	Billings Wtp, US	daily rain	67.3 mm (2.6 in)	46.2 mm (1.8 in)	72 years	69 of 100 (Major)
18 May 1978	Redbank, AU	daily rain	57.4 mm (2.3 in)	39.1 mm (1.5 in)	68 years	68 of 100 (Major)
18 May 1978	Tullaroop Reservoir, AU	daily rain	45.0 mm (1.8 in)	25.2 mm (1.0 in)	77 years	68 of 100 (Major)
18 May 1978	Boort, AU	daily rain	42.0 mm (1.7 in)	20.4 mm (0.8 in)	87 years	65 of 100 (Major)
18 May 1978	Wentworth (Burtundy), AU	daily rain	47.8 mm (1.9 in)	34.6 mm (1.4 in)	68 years	64 of 100 (Major)
18 May 1978	Delegate Station, AU	daily rain	44.0 mm (1.7 in)	27.0 mm (1.1 in)	52 years	60 of 100 (Major)
18 May 1978	Stradbroke Station, AU	daily rain	55.0 mm (2.2 in)	55.0 mm (2.2 in)	61 years	59 of 100 (Notable)
18 May 1978	Beechal, AU	daily rain	34.0 mm (1.3 in)	28.4 mm (1.1 in)	91 years	58 of 100 (Notable)
18 May 1978	Mooroopna, AU	daily rain	33.2 mm (1.3 in)	20.2 mm (0.8 in)	77 years	58 of 100 (Notable)
18 May 1978	Huntley Exp STN, US	daily rain	45.2 mm (1.8 in)	36.8 mm (1.4 in)	40 years	58 of 100 (Notable)
18 May 1978	Wycheproof (Post Office), AU	daily rain	44.0 mm (1.7 in)	14.8 mm (0.6 in)	81 years	57 of 100 (Notable)
18 May 1978	St Arnaud, AU	monthly rain	57.6 mm (2.3 in)	6.8 mm (0.27 in)	95 years	56 of 100 (Notable)
18 May 1978	Knowsley Post Office, AU	daily rain	43.0 mm (1.7 in)	25.5 mm (1.0 in)	51 years	56 of 100 (Notable)
18 May 1978	Petrolandia (Itaparica), BR	daily rain	45.0 mm (1.8 in)	41.8 mm (1.6 in)	40 years	56 of 100 (Notable)
18 May 1978	Le Bourget, FR	daily rain	35.8 mm (1.4 in)	17.2 mm (0.7 in)	72 years	56 of 100 (Notable)
18 May 1978	Broadview, US	daily rain	36.3 mm (1.4 in)	22.3 mm (0.9 in)	71 years	56 of 100 (Notable)
18 May 1978	Boulia Airport, AU	daily rain	32.0 mm (1.3 in)	30.2 mm (1.2 in)	68 years	55 of 100 (Notable)
18 May 1978	Tibooburra Post Office, AU	daily rain	38.8 mm (1.5 in)	17.5 mm (0.7 in)	91 years	55 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 1978

Records set or tied on this calendar date in each year from 1796 to 1978. 1978 had 1,090 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 1978-05-18: 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	802
20 to 40	132
40 to 60	21
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	1