Weather Records on 17 April 1978

620 weather records were set or tied worldwide on 17 April 1978. Highest significance: Urgench, UZ.

Key Facts for 17 April 1978

On 17 April 1978, 620 weather records were set or tied at long-record stations worldwide.
91 were record highs and 218 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 13 monthly and 604 daily.
Urgench set an all-time record daily precipitation of 50.0 mm (2.0 in) on 17 April 1978.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 451 records.

Record Map

620 stations

620 station records on 17 April 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Urgench	Uzbekistan	Record daily precipitation	50.0 mm (2.0 in)	65 of 100 (Major)
Mariyna Gorka	Belarus	Record daily precipitation	25.6 mm (1.0 in)	59 of 100 (Notable)
Weissenburg	Germany	Record snow depth	23.0 cm (9.1 in)	58 of 100 (Notable)
East London -Signal STN	South Africa	Record daily precipitation	57.0 mm (2.2 in)	57 of 100 (Notable)
Blaauwkop	South Africa	Record daily precipitation	87.2 mm (3.4 in)	55 of 100 (Notable)
Waterford (Tycor)	Ireland	Record daily precipitation	30.1 mm (1.2 in)	54 of 100 (Notable)
Beatrice	United States	Record daily precipitation	45.7 mm (1.8 in)	51 of 100 (Notable)
Warden (Mag)	South Africa	Record daily precipitation	55.0 mm (2.2 in)	50 of 100 (Notable)
Snake Rvr	United States	Record daily snowfall	17.8 cm (7.0 in)	50 of 100 (Notable)
Pierre Rgnl AP	United States	Record daily precipitation	29.7 mm (1.2 in)	48 of 100 (Notable)
Auburn 5 ESE	United States	Record daily precipitation	43.4 mm (1.7 in)	47 of 100 (Notable)
Sioux Falls	United States	Record daily precipitation	37.6 mm (1.5 in)	46 of 100 (Notable)
Western 2W	United States	Record daily precipitation	55.9 mm (2.2 in)	43 of 100 (Notable)
Mill Creek Dam	United States	Record daily precipitation	30.0 mm (1.2 in)	42 of 100 (Notable)
Big Sandy	United States	Record daily precipitation	26.7 mm (1.1 in)	41 of 100 (Notable)
Austin Downs	Australia	Record daily precipitation	28.4 mm (1.1 in)	40 of 100 (Notable)
Bruning	United States	Record daily precipitation	53.1 mm (2.1 in)	40 of 100 (Notable)
N Bend SW Oregon Rgnl AP	United States	Record daily precipitation	42.4 mm (1.7 in)	40 of 100 (Notable)
Entre Rios de Minas	Brazil	Record daily precipitation	40.2 mm (1.6 in)	39 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record low maximum temperature	-9.9 C (14.2 F)	39 of 100 (Notable)
Cut Bank AP	United States	Record daily snowfall	17.3 cm (6.8 in)	39 of 100 (Notable)
Driekoppies	South Africa	Record daily precipitation	75.2 mm (3.0 in)	38 of 100 (Notable)
Brady Aznoe	United States	Record daily precipitation	31.0 mm (1.2 in)	38 of 100 (Notable)
Clay Ctr 6 ESE	United States	Record daily precipitation	42.4 mm (1.7 in)	35 of 100 (Notable)
Congonhas-Montante	Brazil	Record daily precipitation	32.4 mm (1.3 in)	34 of 100 (Routine)
Hawarden	United States	Record daily precipitation	25.9 mm (1.0 in)	34 of 100 (Routine)
Ft Benton	United States	Record daily precipitation	26.4 mm (1.0 in)	33 of 100 (Routine)
Campolide	Brazil	Record daily precipitation	34.9 mm (1.4 in)	32 of 100 (Routine)
Jimenez (Smn)	Mexico	Record high minimum temperature	15.0 C (59.0 F)	32 of 100 (Routine)
Shenandoah	United States	Record daily precipitation	43.4 mm (1.7 in)	32 of 100 (Routine)
Hastings 4N	United States	Record daily precipitation	39.4 mm (1.6 in)	32 of 100 (Routine)
Moorestown 4 E	United States	Record low minimum temperature	-3.3 C (26.1 F)	32 of 100 (Routine)
Wagner	United States	Record daily precipitation	27.2 mm (1.1 in)	32 of 100 (Routine)
Port Townsend	United States	Record low maximum temperature	8.3 C (46.9 F)	32 of 100 (Routine)
Usina Barbacena	Brazil	Record daily precipitation	37.2 mm (1.5 in)	31 of 100 (Routine)
Waterford	South Africa	Record daily precipitation	27.8 mm (1.1 in)	31 of 100 (Routine)
Wymore	United States	Record daily precipitation	37.1 mm (1.5 in)	31 of 100 (Routine)
Traverse Cy Cherry Capital AP	United States	Record low minimum temperature	-7.2 C (19.0 F)	31 of 100 (Routine)
Pontal	Brazil	Record daily precipitation	27.7 mm (1.1 in)	30 of 100 (Routine)
Fort Macleod	Canada	Record daily snowfall	7.9 cm (3.1 in)	30 of 100 (Routine)
Manyberries Cda	Canada	Record daily precipitation	27.9 mm (1.1 in)	30 of 100 (Routine)
N Fk Rs	United States	Record daily precipitation	33.3 mm (1.3 in)	30 of 100 (Routine)
St John's A	Canada	Record low minimum temperature	-13.2 C (8.2 F)	29 of 100 (Routine)
Sprague	United States	Record daily precipitation	40.9 mm (1.6 in)	29 of 100 (Routine)
Greifswald	Germany	Record low minimum temperature	-2.3 C (27.9 F)	28 of 100 (Routine)
Quitupan	Mexico	Record high maximum temperature	36.7 C (98.1 F)	28 of 100 (Routine)
Winburg (Pol)	South Africa	Record daily precipitation	34.0 mm (1.3 in)	28 of 100 (Routine)
Chileka	Malawi	Record daily precipitation	25.9 mm (1.0 in)	27 of 100 (Routine)
Olenja Rechka	Russia	Record low minimum temperature	-24.2 C (-11.6 F)	27 of 100 (Routine)
Mqanduli (Tnk)	South Africa	Record daily precipitation	25.0 mm (1.0 in)	27 of 100 (Routine)
Red Oak	United States	Record daily precipitation	62.7 mm (2.5 in)	27 of 100 (Routine)
Raymond 2E	United States	Record daily precipitation	31.8 mm (1.3 in)	27 of 100 (Routine)
Newport	United States	Record daily precipitation	42.4 mm (1.7 in)	27 of 100 (Routine)
Bremen-Seefahrtschule	Germany	Record low minimum temperature	-0.8 C (30.6 F)	26 of 100 (Routine)
Pecs Pogany	Hungary	Record low maximum temperature	5.1 C (41.2 F)	26 of 100 (Routine)
Szeged	Hungary	Record low maximum temperature	6.6 C (43.9 F)	26 of 100 (Routine)
Pedregulho	Brazil	Record daily precipitation	27.5 mm (1.1 in)	25 of 100 (Routine)
Ebenezer (Weltevrede)	South Africa	Record daily precipitation	37.0 mm (1.5 in)	25 of 100 (Routine)
Altamura	South Africa	Record daily precipitation	31.5 mm (1.2 in)	25 of 100 (Routine)
Hawarden Bridge	United Kingdom	Record low minimum temperature	0.1 C (32.2 F)	25 of 100 (Routine)

Counts by Type and Timescale

620 records

Records set or tied on 17 April 1978 by type: Highest daily maximum 50, Lowest daily maximum 71, Highest daily minimum 41, Lowest daily minimum 147, Heaviest daily rainfall 271, Heaviest daily snowfall 24, Deepest snow cover 16.

Records on 17 April 1978 by type
Record type	Records
Highest daily maximum	50
Lowest daily maximum	71
Highest daily minimum	41
Lowest daily minimum	147
Heaviest daily rainfall	271
Heaviest daily snowfall	24
Deepest snow cover	16

Records on 17 April 1978 by timescale: all-time 3, monthly 13, daily 604.

How Much Records Were Beaten By

521 broken records

Margins by which the 521 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 203.0. Ties are not counted.

Top 20 by Significance

17 April 1978

Top 20 records on 17 April 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1978	Urgench, UZ	all-time rain	50.0 mm (2.0 in)	23.0 mm (0.9 in)	5 years	65 of 100 (Major)
17 April 1978	Mariyna Gorka, BY	daily rain	25.6 mm (1.0 in)	14.1 mm (0.6 in)	49 years	59 of 100 (Notable)
17 April 1978	Weissenburg, DE	monthly snow depth	23.0 cm (9.1 in)	11.0 cm (4.3 in)	5 years	58 of 100 (Notable)
17 April 1978	East London -Signal STN, ZA	daily rain	57.0 mm (2.2 in)	26.0 mm (1.0 in)	97 years	57 of 100 (Notable)
17 April 1978	Blaauwkop, ZA	daily rain	87.2 mm (3.4 in)	54.2 mm (2.1 in)	35 years	55 of 100 (Notable)
17 April 1978	Waterford (Tycor), IE	daily rain	30.1 mm (1.2 in)	20.2 mm (0.8 in)	36 years	54 of 100 (Notable)
17 April 1978	Beatrice, US	daily rain	45.7 mm (1.8 in)	19.0 mm (0.7 in)	79 years	51 of 100 (Notable)
17 April 1978	Warden (Mag), ZA	daily rain	55.0 mm (2.2 in)	34.7 mm (1.4 in)	40 years	50 of 100 (Notable)
17 April 1978	Snake Rvr, US	daily snowfall	17.8 cm (7.0 in)	12.7 cm (5.0 in)	65 years	50 of 100 (Notable)
17 April 1978	Pierre Rgnl AP, US	daily rain	29.7 mm (1.2 in)	18.5 mm (0.7 in)	48 years	48 of 100 (Notable)
17 April 1978	Auburn 5 ESE, US	daily rain	43.4 mm (1.7 in)	17.0 mm (0.7 in)	77 years	47 of 100 (Notable)
17 April 1978	Sioux Falls, US	daily rain	37.6 mm (1.5 in)	30.2 mm (1.2 in)	39 years	46 of 100 (Notable)
17 April 1978	Western 2W, US	daily rain	55.9 mm (2.2 in)	33.5 mm (1.3 in)	17 years	43 of 100 (Notable)
17 April 1978	Mill Creek Dam, US	daily rain	30.0 mm (1.2 in)	17.8 mm (0.7 in)	24 years	42 of 100 (Notable)
17 April 1978	Big Sandy, US	daily rain	26.7 mm (1.1 in)	16.8 mm (0.7 in)	15 years	41 of 100 (Notable)
17 April 1978	Austin Downs, AU	daily rain	28.4 mm (1.1 in)	22.6 mm (0.9 in)	8 years	40 of 100 (Notable)
17 April 1978	Bruning, US	daily rain	53.1 mm (2.1 in)	13.7 mm (0.5 in)	69 years	40 of 100 (Notable)
17 April 1978	N Bend SW Oregon Rgnl AP, US	daily rain	42.4 mm (1.7 in)	13.7 mm (0.5 in)	59 years	40 of 100 (Notable)
17 April 1978	Entre Rios de Minas, BR	daily rain	40.2 mm (1.6 in)	30.2 mm (1.2 in)	32 years	39 of 100 (Notable)
17 April 1978	Col du Grand St-Bernard, CH	daily low max	-9.9 C (14.2 F)	0.9 C (1.6 F)	90 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

1799 to 1978

Records set or tied on this calendar date in each year from 1799 to 1978. 1978 had 620 records.

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

Records on 04-17 in each year
Year	Records
1799	1
1807	1
1808	1
1815	1
1817	1
1818	1
1819	1
1823	1
1825	1
1830	1
1835	3
1837	1
1845	1
1847	2
1851	1
1852	3
1853	1
1854	1
1855	1
1857	1
1858	1
1862	1
1865	2
1868	1
1873	4
1874	1
1875	3
1877	4
1878	2
1880	2
1889	1
1890	2
1891	2
1892	4
1894	5
1895	1
1896	5
1897	6
1898	3
1899	1
1900	2
1901	4
1902	4
1903	5
1904	19
1905	11
1906	14
1907	16
1908	38
1909	7
1910	29
1911	33
1912	27
1913	20
1914	83
1915	30
1916	30
1917	32
1918	35
1919	39
1920	87
1921	148
1922	96
1923	71
1924	74
1925	103
1926	140
1927	256
1928	308
1929	145
1930	238
1931	216
1932	615
1933	261
1934	234
1935	374
1936	308
1937	439
1938	564
1939	618
1940	337
1941	460
1942	415
1943	285
1944	334
1945	475
1946	492
1947	461
1948	622
1949	439
1950	293
1951	441
1952	529
1953	818
1954	650
1955	394
1956	486
1957	277
1958	702
1959	434
1960	553
1961	667
1962	597
1963	702
1964	766
1965	411
1966	409
1967	935
1968	745
1969	728
1970	547
1971	924
1972	546
1973	589
1974	244
1975	666
1976	1,630
1977	906
1978	620
1979	810
1980	675
1981	621
1982	965
1983	1,365
1984	720
1985	917
1986	997
1987	960
1988	1,082
1989	638
1990	1,065
1991	614
1992	1,105
1993	847
1994	1,047
1995	1,211
1996	1,044
1997	889
1998	1,795
1999	1,730
2000	1,082
2001	1,013
2002	2,284
2003	1,037
2004	761
2005	572
2006	1,430
2007	863
2008	842
2009	779
2010	606
2011	982
2012	920
2013	1,796
2014	913
2015	813
2016	977
2017	469
2018	1,585
2019	458
2020	1,165
2021	701
2022	831
2023	628
2024	690
2025	1,058
2026	838

Download the Data

Data for records on 1978-04-17: 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	505
50 to 100	12
100 to 150	3
150 to 200	0
200 to 250	1