Weather Records on 12 April 1978

533 weather records were set or tied worldwide on 12 April 1978. Highest significance: Grindstone Island, CA.

Key Facts for 12 April 1978

On 12 April 1978, 533 weather records were set or tied at long-record stations worldwide.
106 were record highs and 189 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 524 daily.
Grindstone Island set a daily record snowfall of 27.0 cm (10.6 in) on 12 April 1978.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 501 records.

Record Map

533 stations

533 station records on 12 April 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 April 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Grindstone Island	Canada	Record daily snowfall	27.0 cm (10.6 in)	70 of 100 (Major)
Miena Dam	Australia	Record daily precipitation	45.2 mm (1.8 in)	63 of 100 (Major)
Shannon River (Hermitage)	Australia	Record daily precipitation	44.2 mm (1.7 in)	61 of 100 (Major)
Sackville	Canada	Record daily snowfall	18.0 cm (7.1 in)	61 of 100 (Major)
Stonehenge	Australia	Record daily precipitation	53.4 mm (2.1 in)	55 of 100 (Notable)
Shannon Hec	Australia	Record daily precipitation	51.0 mm (2.0 in)	53 of 100 (Notable)
Liawenee Hec	Australia	Record daily precipitation	45.2 mm (1.8 in)	52 of 100 (Notable)
Ljubljana Bezigrad	Slovenia	Record daily precipitation	50.0 mm (2.0 in)	49 of 100 (Notable)
Laguna de Sanchez	Mexico	Record daily precipitation	43.4 mm (1.7 in)	48 of 100 (Notable)
Waddamana Field Study Centre	Australia	Record daily precipitation	77.0 mm (3.0 in)	46 of 100 (Notable)
Rio Grande City	United States	Record daily precipitation	52.1 mm (2.1 in)	46 of 100 (Notable)
Grand Coteau	United States	Record low maximum temperature	13.3 C (55.9 F)	44 of 100 (Notable)
Ouse (Millbrook)	Australia	Record daily precipitation	27.8 mm (1.1 in)	43 of 100 (Notable)
Sassandra	Cote D'Ivoire	Record daily precipitation	68.0 mm (2.7 in)	42 of 100 (Notable)
Caveside	Australia	Record daily precipitation	50.2 mm (2.0 in)	41 of 100 (Notable)
Helvecia (Efbm)	Brazil	Record daily precipitation	66.0 mm (2.6 in)	41 of 100 (Notable)
Grindstone Island	Canada	Record daily precipitation	27.0 mm (1.1 in)	40 of 100 (Notable)
Collegeville	Canada	Record daily snowfall	10.2 cm (4.0 in)	39 of 100 (Notable)
Charlottetown Cda	Canada	Record daily snowfall	19.5 cm (7.7 in)	39 of 100 (Notable)
Washburn	United States	Record daily snowfall	5.1 cm (2.0 in)	39 of 100 (Notable)
Victoria Valley (Glenrowan)	Australia	Record daily precipitation	47.2 mm (1.9 in)	38 of 100 (Notable)
Hammond	United States	Record low maximum temperature	14.4 C (57.9 F)	38 of 100 (Notable)
Waynesboro 2 W	United States	Record low maximum temperature	14.4 C (57.9 F)	36 of 100 (Notable)
Woodville 4 ESE	United States	Record low maximum temperature	12.8 C (55.0 F)	36 of 100 (Notable)
Franklin 3 NW	United States	Record low maximum temperature	15.0 C (59.0 F)	35 of 100 (Notable)
Falfurrias	United States	Record daily precipitation	38.6 mm (1.5 in)	35 of 100 (Notable)
Harlingen	United States	Record daily precipitation	27.7 mm (1.1 in)	35 of 100 (Notable)
Galveston	United States	Record low maximum temperature	15.0 C (59.0 F)	35 of 100 (Notable)
Brownsville	United States	Record daily precipitation	28.2 mm (1.1 in)	34 of 100 (Routine)
Balla	Australia	Record daily precipitation	27.0 mm (1.1 in)	33 of 100 (Routine)
Presque Isle	United States	Record daily snowfall	15.2 cm (6.0 in)	33 of 100 (Routine)
Moncton A	Canada	Record daily precipitation	35.3 mm (1.4 in)	32 of 100 (Routine)
Donaldsonville 4 SW	United States	Record low maximum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
Jennings	United States	Record low maximum temperature	14.4 C (57.9 F)	32 of 100 (Routine)
Tugaske	Canada	Record daily snowfall	12.7 cm (5.0 in)	31 of 100 (Routine)
Rexton	Canada	Record daily precipitation	42.5 mm (1.7 in)	31 of 100 (Routine)
Irkutsk	Russia	Record high minimum temperature	2.9 C (37.2 F)	31 of 100 (Routine)
Katanning Comparison	Australia	Record high minimum temperature	18.4 C (65.1 F)	30 of 100 (Routine)
Brisbane Regional Office	Australia	Record high minimum temperature	21.5 C (70.7 F)	30 of 100 (Routine)
Salekhard	Russia	Record low minimum temperature	-34.2 C (-29.6 F)	30 of 100 (Routine)
Eastbourne	United Kingdom	Record low maximum temperature	7.0 C (44.6 F)	30 of 100 (Routine)
Melville	United States	Record low maximum temperature	13.3 C (55.9 F)	30 of 100 (Routine)
Fortine 1 N	United States	Record low minimum temperature	-9.4 C (15.1 F)	30 of 100 (Routine)
Epping	United States	Record daily snowfall	10.2 cm (4.0 in)	30 of 100 (Routine)
Bay City Wtr Wks	United States	Record low maximum temperature	16.7 C (62.1 F)	30 of 100 (Routine)
Bundaberg Post Office	Australia	Record high maximum temperature	32.0 C (89.6 F)	29 of 100 (Routine)
Dudinka	Russia	Record low minimum temperature	-38.5 C (-37.3 F)	29 of 100 (Routine)
Eastbourne	United Kingdom	Record low minimum temperature	0.2 C (32.4 F)	29 of 100 (Routine)
Lake Arthur 7 SW	United States	Record low maximum temperature	14.4 C (57.9 F)	29 of 100 (Routine)
Brookhaven City	United States	Record low maximum temperature	12.2 C (54.0 F)	29 of 100 (Routine)
Alice	United States	Record low maximum temperature	17.2 C (63.0 F)	29 of 100 (Routine)
Bundaberg Post Office	Australia	Record high minimum temperature	23.0 C (73.4 F)	28 of 100 (Routine)
Greenwood A	Canada	Record daily snowfall	13.4 cm (5.3 in)	28 of 100 (Routine)
Union de Tula	Mexico	Record low minimum temperature	1.7 C (35.1 F)	28 of 100 (Routine)
Natchez	United States	Record low maximum temperature	14.4 C (57.9 F)	28 of 100 (Routine)
Tarraleah Village	Australia	Record daily precipitation	29.0 mm (1.1 in)	27 of 100 (Routine)
Baddeck	Canada	Record daily snowfall	11.9 cm (4.7 in)	27 of 100 (Routine)
Man	Cote D'Ivoire	Record daily precipitation	69.2 mm (2.7 in)	27 of 100 (Routine)
Bomnak	Russia	Record high maximum temperature	11.5 C (52.7 F)	27 of 100 (Routine)
Schmidtsdrif	South Africa	Record daily precipitation	46.5 mm (1.8 in)	27 of 100 (Routine)

Counts by Type and Timescale

533 records

Records set or tied on 12 April 1978 by type: Highest daily maximum 35, Lowest daily maximum 90, Highest daily minimum 71, Lowest daily minimum 99, Heaviest daily rainfall 176, Heaviest daily snowfall 50, Deepest snow cover 12.

Records on 12 April 1978 by type
Record type	Records
Highest daily maximum	35
Lowest daily maximum	90
Highest daily minimum	71
Lowest daily minimum	99
Heaviest daily rainfall	176
Heaviest daily snowfall	50
Deepest snow cover	12

Records on 12 April 1978 by timescale: all-time 0, monthly 9, daily 524.

How Much Records Were Beaten By

449 broken records

Margins by which the 449 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 168.0. Ties are not counted.

Top 20 by Significance

12 April 1978

Top 20 records on 12 April 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 April 1978	Grindstone Island, CA	daily snowfall	27.0 cm (10.6 in)	16.8 cm (6.6 in)	80 years	70 of 100 (Major)
12 April 1978	Miena Dam, AU	daily rain	45.2 mm (1.8 in)	34.5 mm (1.4 in)	49 years	63 of 100 (Major)
12 April 1978	Shannon River (Hermitage), AU	daily rain	44.2 mm (1.7 in)	35.1 mm (1.4 in)	56 years	61 of 100 (Major)
12 April 1978	Sackville, CA	daily snowfall	18.0 cm (7.1 in)	12.9 cm (5.1 in)	80 years	61 of 100 (Major)
12 April 1978	Stonehenge, AU	daily rain	53.4 mm (2.1 in)	37.9 mm (1.5 in)	33 years	55 of 100 (Notable)
12 April 1978	Shannon Hec, AU	daily rain	51.0 mm (2.0 in)	32.7 mm (1.3 in)	48 years	53 of 100 (Notable)
12 April 1978	Liawenee Hec, AU	daily rain	45.2 mm (1.8 in)	27.4 mm (1.1 in)	59 years	52 of 100 (Notable)
12 April 1978	Ljubljana Bezigrad, SI	daily rain	50.0 mm (2.0 in)	22.9 mm (0.9 in)	61 years	49 of 100 (Notable)
12 April 1978	Laguna de Sanchez, MX	daily rain	43.4 mm (1.7 in)	31.0 mm (1.2 in)	19 years	48 of 100 (Notable)
12 April 1978	Waddamana Field Study Centre, AU	daily rain	77.0 mm (3.0 in)	55.0 mm (2.2 in)	4 years	46 of 100 (Notable)
12 April 1978	Rio Grande City, US	daily rain	52.1 mm (2.1 in)	36.9 mm (1.5 in)	52 years	46 of 100 (Notable)
12 April 1978	Grand Coteau, US	daily low max	13.3 C (55.9 F)	4.5 C (8.1 F)	77 years	44 of 100 (Notable)
12 April 1978	Ouse (Millbrook), AU	daily rain	27.8 mm (1.1 in)	11.8 mm (0.5 in)	59 years	43 of 100 (Notable)
12 April 1978	Sassandra, CI	daily rain	68.0 mm (2.7 in)	49.1 mm (1.9 in)	24 years	42 of 100 (Notable)
12 April 1978	Caveside, AU	daily rain	50.2 mm (2.0 in)	18.2 mm (0.7 in)	63 years	41 of 100 (Notable)
12 April 1978	Helvecia (Efbm), BR	daily rain	66.0 mm (2.6 in)	34.7 mm (1.4 in)	20 years	41 of 100 (Notable)
12 April 1978	Grindstone Island, CA	daily rain	27.0 mm (1.1 in)	13.8 mm (0.5 in)	20 years	40 of 100 (Notable)
12 April 1978	Collegeville, CA	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	60 years	39 of 100 (Notable)
12 April 1978	Charlottetown Cda, CA	daily snowfall	19.5 cm (7.7 in)	11.9 cm (4.7 in)	41 years	39 of 100 (Notable)
12 April 1978	Washburn, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	80 years	39 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 533 records.

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

Records on 04-12 in each year
Year	Records
1793	1
1805	1
1810	1
1812	2
1817	2
1826	1
1831	1
1845	1
1850	1
1854	1
1865	2
1866	2
1868	4
1869	5
1871	1
1873	1
1874	5
1876	2
1877	1
1878	1
1879	4
1881	1
1882	1
1885	2
1889	4
1890	10
1891	3
1892	2
1893	4
1894	1
1895	1
1896	1
1897	4
1898	4
1899	5
1900	6
1901	5
1902	3
1903	10
1904	11
1905	19
1906	24
1907	5
1908	10
1909	16
1910	15
1911	26
1912	48
1913	88
1914	41
1915	125
1916	37
1917	33
1918	40
1919	39
1920	148
1921	34
1922	48
1923	134
1924	69
1925	178
1926	347
1927	179
1928	145
1929	141
1930	638
1931	267
1932	253
1933	551
1934	531
1935	171
1936	277
1937	236
1938	175
1939	1,174
1940	1,407
1941	869
1942	191
1943	614
1944	423
1945	884
1946	347
1947	733
1948	1,496
1949	358
1950	638
1951	1,102
1952	455
1953	707
1954	424
1955	611
1956	382
1957	910
1958	542
1959	513
1960	314
1961	551
1962	510
1963	518
1964	363
1965	659
1966	520
1967	682
1968	717
1969	352
1970	568
1971	587
1972	1,316
1973	903
1974	822
1975	704
1976	1,076
1977	1,069
1978	533
1979	1,096
1980	611
1981	1,068
1982	852
1983	877
1984	671
1985	734
1986	1,350
1987	606
1988	1,369
1989	1,838
1990	946
1991	1,484
1992	1,000
1993	586
1994	1,375
1995	1,173
1996	994
1997	3,094
1998	1,409
1999	873
2000	784
2001	1,369
2002	600
2003	1,079
2004	964
2005	536
2006	796
2007	1,144
2008	1,015
2009	811
2010	935
2011	1,026
2012	666
2013	1,039
2014	597
2015	504
2016	595
2017	519
2018	868
2019	685
2020	1,150
2021	710
2022	1,862
2023	1,262
2024	1,086
2025	1,281
2026	622

Download the Data

Data for records on 1978-04-12: 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 25	400
25 to 50	29
50 to 75	10
75 to 100	3
100 to 125	5
125 to 150	1
150 to 175	1