Weather Records on 20 June 1978

480 weather records were set or tied worldwide on 20 June 1978. Highest significance: Bethlehem, US.

Key Facts for 20 June 1978

On 20 June 1978, 480 weather records were set or tied at long-record stations worldwide.
93 were record highs and 197 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 5 monthly and 472 daily.
Bethlehem set a daily record precipitation of 74.9 mm (2.9 in) on 20 June 1978.
Across 158 earlier years (1800 to 2026) the same calendar date averaged 458 records.

Record Map

480 stations

480 station records on 20 June 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 June 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bethlehem	United States	Record daily precipitation	74.9 mm (2.9 in)	66 of 100 (Major)
Cullowhee	United States	Record daily precipitation	70.6 mm (2.8 in)	57 of 100 (Notable)
Mokpo	Korea, South	Record daily precipitation	181.0 mm (7.1 in)	54 of 100 (Notable)
Gilman	United States	Record daily precipitation	70.4 mm (2.8 in)	54 of 100 (Notable)
Zilair	Russia	Record daily precipitation	39.4 mm (1.6 in)	51 of 100 (Notable)
Alexander	United States	Record daily precipitation	102.9 mm (4.1 in)	51 of 100 (Notable)
Blackwater Dam	United States	Record daily precipitation	59.7 mm (2.4 in)	51 of 100 (Notable)
Manhattan	United States	Record daily precipitation	82.3 mm (3.2 in)	50 of 100 (Notable)
David City 4E	United States	Record daily precipitation	78.7 mm (3.1 in)	50 of 100 (Notable)
Piaxtla	Mexico	Record daily precipitation	109.0 mm (4.3 in)	48 of 100 (Notable)
Ness City	United States	Record daily precipitation	80.3 mm (3.2 in)	48 of 100 (Notable)
McCracken	United States	Record daily precipitation	57.4 mm (2.3 in)	47 of 100 (Notable)
Ottawa	United States	Record daily precipitation	83.8 mm (3.3 in)	45 of 100 (Notable)
Milford 4 NW	United States	Record daily precipitation	57.2 mm (2.3 in)	44 of 100 (Notable)
Wasserkuppe	Germany	Record daily precipitation	52.3 mm (2.1 in)	43 of 100 (Notable)
Ellenburg Depot	United States	Record daily precipitation	36.1 mm (1.4 in)	43 of 100 (Notable)
Honohina 137	United States	Record daily precipitation	52.1 mm (2.1 in)	43 of 100 (Notable)
Emerald Post Office	Australia	Record low maximum temperature	10.0 C (50.0 F)	41 of 100 (Notable)
Cuitzeo	Mexico	Record daily precipitation	42.2 mm (1.7 in)	41 of 100 (Notable)
Lake Park 3SSE	United States	Record daily precipitation	48.3 mm (1.9 in)	41 of 100 (Notable)
Lecompton	United States	Record daily precipitation	103.1 mm (4.1 in)	41 of 100 (Notable)
Basin	United States	Record low minimum temperature	-0.6 C (30.9 F)	41 of 100 (Notable)
Iserlohn-Westig	Germany	Record daily precipitation	39.9 mm (1.6 in)	40 of 100 (Notable)
Bulahdelah Post Office	Australia	Record daily precipitation	63.0 mm (2.5 in)	39 of 100 (Notable)
Nikolo-Poloma	Russia	Record daily precipitation	35.7 mm (1.4 in)	38 of 100 (Notable)
York Pond	United States	Record daily precipitation	45.5 mm (1.8 in)	38 of 100 (Notable)
Coloso	Puerto Rico [United States]	Record low maximum temperature	28.9 C (84.0 F)	37 of 100 (Notable)
Moran	United States	Record daily precipitation	72.6 mm (2.9 in)	37 of 100 (Notable)
Port Macquarie (Bellevue Garde	Australia	Record daily precipitation	73.6 mm (2.9 in)	36 of 100 (Notable)
Kursk	Russia	Record low maximum temperature	10.7 C (51.3 F)	36 of 100 (Notable)
Estherville 4E	United States	Record daily precipitation	48.3 mm (1.9 in)	36 of 100 (Notable)
Wakefield 4 W	United States	Record daily precipitation	70.6 mm (2.8 in)	36 of 100 (Notable)
Luverne	United States	Record daily precipitation	43.9 mm (1.7 in)	36 of 100 (Notable)
Martinsdale 3 NNW	United States	Record low minimum temperature	-2.2 C (28.0 F)	36 of 100 (Notable)
Biskra	Algeria	Record high maximum temperature	43.0 C (109.4 F)	35 of 100 (Notable)
Bogoroditskoye-Fenino	Russia	Record low maximum temperature	11.2 C (52.2 F)	35 of 100 (Notable)
Big Timber	United States	Record low minimum temperature	1.1 C (34.0 F)	35 of 100 (Notable)
Haddam	United States	Record daily precipitation	39.4 mm (1.6 in)	34 of 100 (Routine)
Kon-Kolodez	Russia	Record low maximum temperature	12.3 C (54.1 F)	33 of 100 (Routine)
Avalon Pleasure Pier	United States	Record high minimum temperature	19.4 C (66.9 F)	33 of 100 (Routine)
Larned	United States	Record daily precipitation	48.8 mm (1.9 in)	33 of 100 (Routine)
Wymore	United States	Record daily precipitation	54.6 mm (2.1 in)	33 of 100 (Routine)
Chasm Falls	United States	Record daily precipitation	39.1 mm (1.5 in)	33 of 100 (Routine)
Eagle	United States	Record low maximum temperature	12.8 C (55.0 F)	33 of 100 (Routine)
Nicosia	Cyprus	Record high minimum temperature	24.4 C (75.9 F)	32 of 100 (Routine)
South Danbury	United States	Record daily precipitation	38.1 mm (1.5 in)	32 of 100 (Routine)
Arecibo 3 ESE	Puerto Rico [United States]	Record high minimum temperature	25.6 C (78.1 F)	31 of 100 (Routine)
Rock Rapids	United States	Record daily precipitation	63.5 mm (2.5 in)	31 of 100 (Routine)
Bison 3NW	United States	Record daily precipitation	81.8 mm (3.2 in)	31 of 100 (Routine)
Voronez	Russia	Record low maximum temperature	11.0 C (51.8 F)	30 of 100 (Routine)
Salem	United States	Record daily precipitation	68.8 mm (2.7 in)	30 of 100 (Routine)
Allison	United States	Record daily precipitation	38.1 mm (1.5 in)	30 of 100 (Routine)
Great Bend 3WNW	United States	Record daily precipitation	50.8 mm (2.0 in)	30 of 100 (Routine)
Waldeck	Germany	Record daily precipitation	32.4 mm (1.3 in)	29 of 100 (Routine)
Nikolaev	Ukraine	Record low minimum temperature	9.5 C (49.1 F)	29 of 100 (Routine)
Nashua 2 NNW	United States	Record daily precipitation	36.8 mm (1.4 in)	29 of 100 (Routine)
Velikie Luki	Russia	Record low minimum temperature	1.3 C (34.3 F)	28 of 100 (Routine)
Zolotoj	Russia	Record high maximum temperature	26.2 C (79.2 F)	28 of 100 (Routine)
Vladikavkaz	Russia	Record low maximum temperature	14.0 C (57.2 F)	28 of 100 (Routine)
Kiev	Ukraine	Record low minimum temperature	6.1 C (43.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

480 records

Records set or tied on 20 June 1978 by type: Highest daily maximum 39, Lowest daily maximum 68, Highest daily minimum 54, Lowest daily minimum 129, Heaviest daily rainfall 190.

Records on 20 June 1978 by type
Record type	Records
Highest daily maximum	39
Lowest daily maximum	68
Highest daily minimum	54
Lowest daily minimum	129
Heaviest daily rainfall	190
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 June 1978 by timescale: all-time 3, monthly 5, daily 472.

How Much Records Were Beaten By

393 broken records

Margins by which the 393 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 140.0. Ties are not counted.

Top 20 by Significance

20 June 1978

Top 20 records on 20 June 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 June 1978	Bethlehem, US	daily rain	74.9 mm (2.9 in)	44.9 mm (1.8 in)	60 years	66 of 100 (Major)
20 June 1978	Cullowhee, US	daily rain	70.6 mm (2.8 in)	32.5 mm (1.3 in)	57 years	57 of 100 (Notable)
20 June 1978	Mokpo, KR	daily rain	181.0 mm (7.1 in)	140.0 mm (5.5 in)	32 years	54 of 100 (Notable)
20 June 1978	Gilman, US	daily rain	70.4 mm (2.8 in)	52.6 mm (2.1 in)	33 years	54 of 100 (Notable)
20 June 1978	Zilair, RU	daily rain	39.4 mm (1.6 in)	21.8 mm (0.9 in)	31 years	51 of 100 (Notable)
20 June 1978	Alexander, US	daily rain	102.9 mm (4.1 in)	73.4 mm (2.9 in)	29 years	51 of 100 (Notable)
20 June 1978	Blackwater Dam, US	daily rain	59.7 mm (2.4 in)	41.4 mm (1.6 in)	28 years	51 of 100 (Notable)
20 June 1978	Manhattan, US	daily rain	82.3 mm (3.2 in)	35.8 mm (1.4 in)	76 years	50 of 100 (Notable)
20 June 1978	David City 4E, US	daily rain	78.7 mm (3.1 in)	35.3 mm (1.4 in)	64 years	50 of 100 (Notable)
20 June 1978	Piaxtla, MX	daily rain	109.0 mm (4.3 in)	55.2 mm (2.2 in)	16 years	48 of 100 (Notable)
20 June 1978	Ness City, US	daily rain	80.3 mm (3.2 in)	24.4 mm (1.0 in)	76 years	48 of 100 (Notable)
20 June 1978	McCracken, US	daily rain	57.4 mm (2.3 in)	32.3 mm (1.3 in)	61 years	47 of 100 (Notable)
20 June 1978	Ottawa, US	daily rain	83.8 mm (3.3 in)	25.4 mm (1.0 in)	76 years	45 of 100 (Notable)
20 June 1978	Milford 4 NW, US	daily rain	57.2 mm (2.3 in)	38.9 mm (1.5 in)	32 years	44 of 100 (Notable)
20 June 1978	Wasserkuppe, DE	daily rain	52.3 mm (2.1 in)	30.2 mm (1.2 in)	15 years	43 of 100 (Notable)
20 June 1978	Ellenburg Depot, US	daily rain	36.1 mm (1.4 in)	22.9 mm (0.9 in)	16 years	43 of 100 (Notable)
20 June 1978	Honohina 137, US	daily rain	52.1 mm (2.1 in)	21.6 mm (0.9 in)	63 years	43 of 100 (Notable)
20 June 1978	Emerald Post Office, AU	all-time low max	10.0 C (50.0 F)	0.8 C (1.4 F)	35 years	41 of 100 (Notable)
20 June 1978	Cuitzeo, MX	daily rain	42.2 mm (1.7 in)	22.4 mm (0.9 in)	20 years	41 of 100 (Notable)
20 June 1978	Lake Park 3SSE, US	daily rain	48.3 mm (1.9 in)	26.7 mm (1.1 in)	64 years	41 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

1800 to 1978

Records set or tied on this calendar date in each year from 1800 to 1978. 1978 had 480 records.

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

Records on 06-20 in each year
Year	Records
1800	1
1803	1
1813	1
1821	2
1838	1
1839	1
1841	1
1844	1
1846	2
1847	1
1850	1
1855	2
1857	1
1861	1
1865	2
1867	1
1869	2
1872	1
1873	1
1877	2
1879	1
1884	1
1886	2
1887	2
1891	2
1892	2
1893	2
1895	4
1896	3
1897	6
1898	3
1899	6
1900	4
1901	5
1902	7
1903	22
1904	13
1905	14
1906	18
1907	10
1908	30
1909	9
1910	27
1911	27
1912	17
1913	30
1914	53
1915	75
1916	83
1917	96
1918	54
1919	67
1920	40
1921	42
1922	61
1923	263
1924	204
1925	483
1926	228
1927	193
1928	199
1929	137
1930	143
1931	536
1932	182
1933	676
1934	301
1935	337
1936	529
1937	412
1938	326
1939	270
1940	469
1941	200
1942	757
1943	447
1944	315
1945	769
1946	849
1947	387
1948	554
1949	314
1950	328
1951	289
1952	318
1953	998
1954	414
1955	291
1956	484
1957	598
1958	603
1959	504
1960	451
1961	836
1962	173
1963	379
1964	729
1965	463
1966	441
1967	687
1968	559
1969	982
1970	482
1971	395
1972	660
1973	553
1974	743
1975	984
1976	899
1977	453
1978	480
1979	727
1980	922
1981	987
1982	801
1983	724
1984	686
1985	811
1986	732
1987	960
1988	1,222
1989	918
1990	899
1991	1,085
1992	1,049
1993	964
1994	925
1995	1,260
1996	1,123
1997	738
1998	1,627
1999	906
2000	1,328
2001	771
2002	955
2003	843
2004	1,071
2005	1,055
2006	820
2007	1,208
2008	669
2009	1,060
2010	865
2011	1,359
2012	1,045
2013	879
2014	381
2015	637
2016	1,352
2017	1,086
2018	635
2019	693
2020	590
2021	1,161
2022	972
2023	1,265
2024	783
2025	944
2026	757

Download the Data

Data for records on 1978-06-20: 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	357
20 to 40	29
40 to 60	4
60 to 80	2
80 to 100	0
100 to 120	0
120 to 140	1