Weather Records on 18 April 1978

803 weather records were set or tied worldwide on 18 April 1978. Highest significance: Highmore, US.

Key Facts for 18 April 1978

On 18 April 1978, 803 weather records were set or tied at long-record stations worldwide.
115 were record highs and 195 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 18 monthly and 785 daily.
Highmore set a daily record snowfall of 17.8 cm (7.0 in) on 18 April 1978.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 465 records.

Record Map

803 stations

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

Weather records on 18 April 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Highmore	United States	Record daily snowfall	17.8 cm (7.0 in)	64 of 100 (Major)
Cherokee	United States	Record daily precipitation	43.2 mm (1.7 in)	58 of 100 (Notable)
Gann Valley 4NW	United States	Record daily snowfall	15.2 cm (6.0 in)	58 of 100 (Notable)
Cwebe	South Africa	Record daily precipitation	147.0 mm (5.8 in)	55 of 100 (Notable)
Luverne	United States	Record daily precipitation	30.7 mm (1.2 in)	54 of 100 (Notable)
Port Alfred	South Africa	Record daily precipitation	85.5 mm (3.4 in)	53 of 100 (Notable)
Newport	United States	Record daily precipitation	62.7 mm (2.5 in)	53 of 100 (Notable)
Cherry Point MCAS	United States	Record daily precipitation	70.4 mm (2.8 in)	52 of 100 (Notable)
Srinagar	India	Record daily precipitation	46.0 mm (1.8 in)	51 of 100 (Notable)
Calingiri	Australia	Record daily precipitation	35.0 mm (1.4 in)	50 of 100 (Notable)
Wessington Springs	United States	Record daily snowfall	10.2 cm (4.0 in)	50 of 100 (Notable)
Wonnenup	Australia	Record daily precipitation	33.0 mm (1.3 in)	47 of 100 (Notable)
Forestburg 4 NNE	United States	Record daily snowfall	10.2 cm (4.0 in)	47 of 100 (Notable)
Morgenrood	South Africa	Record daily precipitation	43.5 mm (1.7 in)	46 of 100 (Notable)
Denison	United States	Record daily precipitation	35.8 mm (1.4 in)	46 of 100 (Notable)
Hatteras	United States	Record daily precipitation	31.0 mm (1.2 in)	46 of 100 (Notable)
Hyden North	Australia	Record daily precipitation	55.0 mm (2.2 in)	45 of 100 (Notable)
Sheldon	United States	Record daily precipitation	29.7 mm (1.2 in)	45 of 100 (Notable)
Washington Wwtp 4W	United States	Record daily precipitation	46.5 mm (1.8 in)	45 of 100 (Notable)
Galena	United States	Record daily precipitation	33.0 mm (1.3 in)	44 of 100 (Notable)
Tasiilaq	Greenland [Denmark]	Record daily precipitation	25.9 mm (1.0 in)	43 of 100 (Notable)
Zaaiplaats	South Africa	Record daily precipitation	36.4 mm (1.4 in)	43 of 100 (Notable)
Guthrie Ctr	United States	Record daily precipitation	61.7 mm (2.4 in)	43 of 100 (Notable)
Creston 2 SW	United States	Record daily precipitation	54.1 mm (2.1 in)	42 of 100 (Notable)
Estherville 4E	United States	Record daily precipitation	38.1 mm (1.5 in)	41 of 100 (Notable)
Faulkton	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Lead	United States	Record daily snowfall	48.3 cm (19.0 in)	41 of 100 (Notable)
Grinnell 3 SW	United States	Record daily precipitation	62.7 mm (2.5 in)	40 of 100 (Notable)
Sibley	United States	Record daily precipitation	27.4 mm (1.1 in)	40 of 100 (Notable)
New London	United States	Record daily snowfall	5.1 cm (2.0 in)	40 of 100 (Notable)
Aleppo	Australia	Record daily precipitation	28.0 mm (1.1 in)	39 of 100 (Notable)
Primghar	United States	Record daily precipitation	38.9 mm (1.5 in)	39 of 100 (Notable)
Sanborn	United States	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Miller	United States	Record daily snowfall	7.6 cm (3.0 in)	39 of 100 (Notable)
Morris River	United States	Record daily precipitation	34.3 mm (1.4 in)	38 of 100 (Notable)
Houston Wb City	United States	Record high maximum temperature	31.1 C (88.0 F)	38 of 100 (Notable)
Tuxcueca	Mexico	Record high maximum temperature	38.9 C (102.0 F)	37 of 100 (Notable)
Boschkloof	South Africa	Record daily precipitation	27.3 mm (1.1 in)	37 of 100 (Notable)
Doorndraai	South Africa	Record daily precipitation	37.0 mm (1.5 in)	37 of 100 (Notable)
Macomb	United States	Record daily precipitation	33.0 mm (1.3 in)	37 of 100 (Notable)
Milford 4 NW	United States	Record daily precipitation	31.0 mm (1.2 in)	37 of 100 (Notable)
Highmore	United States	Record snow depth	12.7 cm (5.0 in)	37 of 100 (Notable)
Cheraw	United States	Record low maximum temperature	12.2 C (54.0 F)	36 of 100 (Notable)
Belle Plaine	United States	Record daily precipitation	33.0 mm (1.3 in)	35 of 100 (Notable)
Farmington 3NW	United States	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Nebraska City 2NW	United States	Record daily precipitation	75.2 mm (3.0 in)	35 of 100 (Notable)
Daytona Beach Intl AP	United States	Record daily precipitation	73.4 mm (2.9 in)	35 of 100 (Notable)
Jacobsdal (Pol)	South Africa	Record daily precipitation	27.0 mm (1.1 in)	34 of 100 (Routine)
Gertruida	South Africa	Record daily precipitation	31.2 mm (1.2 in)	34 of 100 (Routine)
Mt Carroll	United States	Record daily precipitation	31.8 mm (1.3 in)	34 of 100 (Routine)
Toledo 3N	United States	Record daily precipitation	65.5 mm (2.6 in)	34 of 100 (Routine)
Canby	United States	Record daily snowfall	6.4 cm (2.5 in)	34 of 100 (Routine)
Hickory Flat	United States	Record daily precipitation	47.0 mm (1.9 in)	34 of 100 (Routine)
Elmira	United States	Record low minimum temperature	-7.8 C (18.0 F)	34 of 100 (Routine)
Camden 3 W	United States	Record low maximum temperature	13.9 C (57.0 F)	34 of 100 (Routine)
Winner	United States	Record daily precipitation	27.9 mm (1.1 in)	34 of 100 (Routine)
Prairie du Chien	United States	Record daily precipitation	31.0 mm (1.2 in)	34 of 100 (Routine)
San Juan del Rio (Smn)	Mexico	Record high maximum temperature	33.9 C (93.0 F)	33 of 100 (Routine)
Montezuma 1 W	United States	Record daily precipitation	50.3 mm (2.0 in)	33 of 100 (Routine)
Pocahontas	United States	Record daily precipitation	40.1 mm (1.6 in)	33 of 100 (Routine)

Counts by Type and Timescale

803 records

Records set or tied on 18 April 1978 by type: Highest daily maximum 67, Lowest daily maximum 88, Highest daily minimum 48, Lowest daily minimum 107, Heaviest daily rainfall 431, Heaviest daily snowfall 41, Deepest snow cover 21.

Records on 18 April 1978 by type
Record type	Records
Highest daily maximum	67
Lowest daily maximum	88
Highest daily minimum	48
Lowest daily minimum	107
Heaviest daily rainfall	431
Heaviest daily snowfall	41
Deepest snow cover	21

Records on 18 April 1978 by timescale: all-time 0, monthly 18, daily 785.

How Much Records Were Beaten By

684 broken records

Margins by which the 684 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 279.0. Ties are not counted.

Top 20 by Significance

18 April 1978

Top 20 records on 18 April 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1978	Highmore, US	daily snowfall	17.8 cm (7.0 in)	17.8 cm (7.0 in)	84 years	64 of 100 (Major)
18 April 1978	Cherokee, US	daily rain	43.2 mm (1.7 in)	31.5 mm (1.2 in)	52 years	58 of 100 (Notable)
18 April 1978	Gann Valley 4NW, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	78 years	58 of 100 (Notable)
18 April 1978	Cwebe, ZA	daily rain	147.0 mm (5.8 in)	106.4 mm (4.2 in)	28 years	55 of 100 (Notable)
18 April 1978	Luverne, US	daily rain	30.7 mm (1.2 in)	20.3 mm (0.8 in)	79 years	54 of 100 (Notable)
18 April 1978	Port Alfred, ZA	monthly rain	85.5 mm (3.4 in)	9.8 mm (0.39 in)	84 years	53 of 100 (Notable)
18 April 1978	Newport, US	daily rain	62.7 mm (2.5 in)	25.9 mm (1.0 in)	93 years	53 of 100 (Notable)
18 April 1978	Cherry Point MCAS, US	daily rain	70.4 mm (2.8 in)	54.4 mm (2.1 in)	32 years	52 of 100 (Notable)
18 April 1978	Srinagar, IN	daily rain	46.0 mm (1.8 in)	30.8 mm (1.2 in)	37 years	51 of 100 (Notable)
18 April 1978	Calingiri, AU	daily rain	35.0 mm (1.4 in)	29.2 mm (1.1 in)	24 years	50 of 100 (Notable)
18 April 1978	Wessington Springs, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	84 years	50 of 100 (Notable)
18 April 1978	Wonnenup, AU	daily rain	33.0 mm (1.3 in)	24.4 mm (1.0 in)	20 years	47 of 100 (Notable)
18 April 1978	Forestburg 4 NNE, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	84 years	47 of 100 (Notable)
18 April 1978	Morgenrood, ZA	daily rain	43.5 mm (1.7 in)	22.2 mm (0.9 in)	64 years	46 of 100 (Notable)
18 April 1978	Denison, US	daily rain	35.8 mm (1.4 in)	18.8 mm (0.7 in)	64 years	46 of 100 (Notable)
18 April 1978	Hatteras, US	daily rain	31.0 mm (1.2 in)	20.1 mm (0.8 in)	73 years	46 of 100 (Notable)
18 April 1978	Hyden North, AU	daily rain	55.0 mm (2.2 in)	51.4 mm (2.0 in)	9 years	45 of 100 (Notable)
18 April 1978	Sheldon, US	daily rain	29.7 mm (1.2 in)	19.3 mm (0.8 in)	49 years	45 of 100 (Notable)
18 April 1978	Washington Wwtp 4W, US	daily rain	46.5 mm (1.8 in)	28.7 mm (1.1 in)	40 years	45 of 100 (Notable)
18 April 1978	Galena, US	daily rain	33.0 mm (1.3 in)	11.4 mm (0.4 in)	81 years	44 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

1793 to 1978

Records set or tied on this calendar date in each year from 1793 to 1978. 1978 had 803 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1978-04-18: 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 50	650
50 to 100	22
100 to 150	6
150 to 200	5
200 to 250	0
250 to 300	1