Weather Records on 21 June 1978

368 weather records were set or tied worldwide on 21 June 1978. Highest significance: Kilauea 1134, US.

Key Facts for 21 June 1978

On 21 June 1978, 368 weather records were set or tied at long-record stations worldwide.
80 were record highs and 141 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 15 monthly and 350 daily.
Kilauea 1134 set a daily record precipitation of 53.1 mm (2.1 in) on 21 June 1978.
Across 165 earlier years (1802 to 2026) the same calendar date averaged 431 records.

Record Map

368 stations

368 station records on 21 June 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 June 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kilauea 1134	United States	Record daily precipitation	53.1 mm (2.1 in)	56 of 100 (Notable)
Waiahi Lower 1054	United States	Record daily precipitation	82.8 mm (3.3 in)	53 of 100 (Notable)
Waiahi Upper 1052	United States	Record daily precipitation	98.0 mm (3.9 in)	52 of 100 (Notable)
Kapuskasing Cda	Canada	Record daily precipitation	41.2 mm (1.6 in)	49 of 100 (Notable)
Koloa Mauka 994	United States	Record daily precipitation	50.8 mm (2.0 in)	49 of 100 (Notable)
Princeville Rch 1117	United States	Record daily precipitation	51.3 mm (2.0 in)	49 of 100 (Notable)
Halaula 1110	United States	Record daily precipitation	31.0 mm (1.2 in)	48 of 100 (Notable)
Lihue 1020	United States	Record daily precipitation	41.9 mm (1.6 in)	48 of 100 (Notable)
Kapuskasing A	Canada	Record daily precipitation	39.1 mm (1.5 in)	45 of 100 (Notable)
Pomerode	Brazil	Record daily precipitation	50.6 mm (2.0 in)	44 of 100 (Notable)
Waiahole 837	United States	Record daily precipitation	66.8 mm (2.6 in)	43 of 100 (Notable)
Alibek	Azerbaijan	Record daily precipitation	74.5 mm (2.9 in)	42 of 100 (Notable)
Sulak	Russia	Record daily precipitation	50.9 mm (2.0 in)	42 of 100 (Notable)
Kemoo Camp 8 855	United States	Record daily precipitation	33.5 mm (1.3 in)	42 of 100 (Notable)
Tbilisi	Georgia	Record daily precipitation	40.6 mm (1.6 in)	40 of 100 (Notable)
Kapalama 773	United States	Record daily precipitation	31.5 mm (1.2 in)	40 of 100 (Notable)
Shahat	Libya	Record high minimum temperature	28.0 C (82.4 F)	38 of 100 (Notable)
Henichesk	Ukraine	Record low minimum temperature	10.5 C (50.9 F)	38 of 100 (Notable)
Ann Arbor U of Mich	United States	Record daily precipitation	46.2 mm (1.8 in)	38 of 100 (Notable)
Quilcene 2 SW	United States	Record high minimum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Gulkana AP	United States	Record low minimum temperature	-2.8 C (27.0 F)	37 of 100 (Notable)
Barisaho	Georgia	Record daily precipitation	49.0 mm (1.9 in)	36 of 100 (Notable)
Kvareli	Georgia	Record daily precipitation	95.7 mm (3.8 in)	36 of 100 (Notable)
Vladikavkaz	Russia	Record low maximum temperature	10.0 C (50.0 F)	36 of 100 (Notable)
Monroe	United States	Record daily precipitation	33.8 mm (1.3 in)	36 of 100 (Notable)
Salmon Gums Res.STN.	Australia	Record high maximum temperature	27.5 C (81.5 F)	34 of 100 (Routine)
Sagaredzo	Georgia	Record daily precipitation	55.0 mm (2.2 in)	34 of 100 (Routine)
Clinton	United States	Record daily precipitation	42.7 mm (1.7 in)	33 of 100 (Routine)
Huehue 92.1	United States	Record daily precipitation	32.5 mm (1.3 in)	33 of 100 (Routine)
Albacete Los Llanos	Spain	Record low minimum temperature	6.6 C (43.9 F)	32 of 100 (Routine)
Luiz Alves	Brazil	Record daily precipitation	48.0 mm (1.9 in)	31 of 100 (Routine)
Blumenau (Pcd)	Brazil	Record daily precipitation	36.9 mm (1.5 in)	31 of 100 (Routine)
Narva	Estonia	Record low minimum temperature	3.7 C (38.7 F)	31 of 100 (Routine)
Shahat	Libya	Record high maximum temperature	40.0 C (104.0 F)	31 of 100 (Routine)
Kon-Kolodez	Russia	Record low maximum temperature	13.5 C (56.3 F)	31 of 100 (Routine)
Kursk	Russia	Record low maximum temperature	14.0 C (57.2 F)	31 of 100 (Routine)
Laurel	United States	Record daily precipitation	68.6 mm (2.7 in)	31 of 100 (Routine)
Hamilton Fairfield	United States	Record daily precipitation	48.3 mm (1.9 in)	31 of 100 (Routine)
Tatarsk	Russia	Record high minimum temperature	18.6 C (65.5 F)	30 of 100 (Routine)
Gudermes	Russia	Record low maximum temperature	15.5 C (59.9 F)	30 of 100 (Routine)
Avalon Pleasure Pier	United States	Record high maximum temperature	27.8 C (82.0 F)	30 of 100 (Routine)
Alta 1 NNW	United States	Record low minimum temperature	-3.9 C (25.0 F)	30 of 100 (Routine)
Arrozeira	Brazil	Record daily precipitation	40.0 mm (1.6 in)	29 of 100 (Routine)
Sotchi	Russia	Record low minimum temperature	10.5 C (50.9 F)	29 of 100 (Routine)
Derbent	Russia	Record low maximum temperature	17.5 C (63.5 F)	29 of 100 (Routine)
Wynne	United States	Record high minimum temperature	25.6 C (78.1 F)	29 of 100 (Routine)
Strathalbyn	Australia	Record daily precipitation	39.2 mm (1.5 in)	28 of 100 (Routine)
Ahmadabad	India	Record daily precipitation	34.0 mm (1.3 in)	27 of 100 (Routine)
Woodstock	United States	Record daily precipitation	47.0 mm (1.9 in)	27 of 100 (Routine)
Astara	Azerbaijan	Record daily precipitation	27.4 mm (1.1 in)	26 of 100 (Routine)
Coloso	Puerto Rico [United States]	Record low maximum temperature	27.8 C (82.0 F)	26 of 100 (Routine)
Borinquen AP	Puerto Rico [United States]	Record high maximum temperature	32.8 C (91.0 F)	26 of 100 (Routine)
Bolshoe Goloustnoe	Russia	Record high maximum temperature	30.5 C (86.9 F)	26 of 100 (Routine)
Lahontan Dam	United States	Record low minimum temperature	3.3 C (37.9 F)	26 of 100 (Routine)
Bakuriani	Georgia	Record daily precipitation	26.1 mm (1.0 in)	25 of 100 (Routine)
Voronez	Russia	Record low maximum temperature	14.3 C (57.7 F)	25 of 100 (Routine)
Indio Fire STN	United States	Record low minimum temperature	16.1 C (61.0 F)	25 of 100 (Routine)
Halenanaho 1006	United States	Record daily precipitation	41.7 mm (1.6 in)	25 of 100 (Routine)
Red Lake A	Canada	Record low minimum temperature	1.5 C (34.7 F)	24 of 100 (Routine)
Gardabani	Georgia	Record daily precipitation	37.8 mm (1.5 in)	24 of 100 (Routine)

Counts by Type and Timescale

368 records

Records set or tied on 21 June 1978 by type: Highest daily maximum 25, Lowest daily maximum 68, Highest daily minimum 55, Lowest daily minimum 73, Heaviest daily rainfall 147.

Records on 21 June 1978 by type
Record type	Records
Highest daily maximum	25
Lowest daily maximum	68
Highest daily minimum	55
Lowest daily minimum	73
Heaviest daily rainfall	147
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 June 1978 by timescale: all-time 3, monthly 15, daily 350.

How Much Records Were Beaten By

293 broken records

Margins by which the 293 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 63.7. Ties are not counted.

Top 20 by Significance

21 June 1978

Top 20 records on 21 June 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 June 1978	Kilauea 1134, US	daily rain	53.1 mm (2.1 in)	38.6 mm (1.5 in)	31 years	56 of 100 (Notable)
21 June 1978	Waiahi Lower 1054, US	daily rain	82.8 mm (3.3 in)	63.7 mm (2.5 in)	31 years	53 of 100 (Notable)
21 June 1978	Waiahi Upper 1052, US	daily rain	98.0 mm (3.9 in)	63.7 mm (2.5 in)	32 years	52 of 100 (Notable)
21 June 1978	Kapuskasing Cda, CA	daily rain	41.2 mm (1.6 in)	29.0 mm (1.1 in)	24 years	49 of 100 (Notable)
21 June 1978	Koloa Mauka 994, US	daily rain	50.8 mm (2.0 in)	39.9 mm (1.6 in)	20 years	49 of 100 (Notable)
21 June 1978	Princeville Rch 1117, US	daily rain	51.3 mm (2.0 in)	30.7 mm (1.2 in)	17 years	49 of 100 (Notable)
21 June 1978	Halaula 1110, US	daily rain	31.0 mm (1.2 in)	15.8 mm (0.6 in)	67 years	48 of 100 (Notable)
21 June 1978	Lihue 1020, US	daily rain	41.9 mm (1.6 in)	15.5 mm (0.6 in)	52 years	48 of 100 (Notable)
21 June 1978	Kapuskasing A, CA	daily rain	39.1 mm (1.5 in)	29.7 mm (1.2 in)	24 years	45 of 100 (Notable)
21 June 1978	Pomerode, BR	daily rain	50.6 mm (2.0 in)	34.2 mm (1.3 in)	37 years	44 of 100 (Notable)
21 June 1978	Waiahole 837, US	daily rain	66.8 mm (2.6 in)	49.3 mm (1.9 in)	28 years	43 of 100 (Notable)
21 June 1978	Alibek, AZ	daily rain	74.5 mm (2.9 in)	46.6 mm (1.8 in)	32 years	42 of 100 (Notable)
21 June 1978	Sulak, RU	daily rain	50.9 mm (2.0 in)	25.8 mm (1.0 in)	32 years	42 of 100 (Notable)
21 June 1978	Kemoo Camp 8 855, US	daily rain	33.5 mm (1.3 in)	12.4 mm (0.5 in)	28 years	42 of 100 (Notable)
21 June 1978	Tbilisi, GE	daily rain	40.6 mm (1.6 in)	23.7 mm (0.9 in)	32 years	40 of 100 (Notable)
21 June 1978	Kapalama 773, US	daily rain	31.5 mm (1.2 in)	16.3 mm (0.6 in)	28 years	40 of 100 (Notable)
21 June 1978	Shahat, LY	all-time high min	28.0 C (82.4 F)	0.3 C (0.5 F)	43 years	38 of 100 (Notable)
21 June 1978	Henichesk, UA	daily low min	10.5 C (50.9 F)	1.3 C (2.3 F)	84 years	38 of 100 (Notable)
21 June 1978	Ann Arbor U of Mich, US	daily rain	46.2 mm (1.8 in)	10.6 mm (0.4 in)	69 years	38 of 100 (Notable)
21 June 1978	Quilcene 2 SW, US	monthly high min	17.8 C (64.0 F)	2.2 C (4.0 F)	47 years	37 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

1802 to 1978

Records set or tied on this calendar date in each year from 1802 to 1978. 1978 had 368 records.

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

Records on 06-21 in each year
Year	Records
1802	1
1803	2
1805	1
1814	1
1821	3
1828	1
1831	1
1839	2
1846	1
1853	1
1855	1
1861	3
1865	1
1868	1
1869	4
1870	3
1871	1
1873	1
1874	1
1875	2
1879	1
1880	1
1881	1
1882	1
1883	1
1884	2
1885	1
1886	3
1887	1
1888	3
1889	1
1891	1
1892	2
1893	7
1895	6
1896	3
1897	3
1898	6
1899	6
1900	6
1901	5
1902	20
1903	15
1904	7
1905	14
1906	19
1907	15
1908	20
1909	19
1910	36
1911	12
1912	14
1913	34
1914	24
1915	40
1916	80
1917	97
1918	77
1919	32
1920	42
1921	85
1922	43
1923	229
1924	124
1925	333
1926	162
1927	146
1928	139
1929	84
1930	177
1931	340
1932	180
1933	645
1934	223
1935	247
1936	642
1937	475
1938	396
1939	250
1940	674
1941	401
1942	340
1943	439
1944	426
1945	709
1946	386
1947	637
1948	392
1949	391
1950	329
1951	347
1952	502
1953	761
1954	501
1955	271
1956	534
1957	932
1958	627
1959	356
1960	471
1961	956
1962	176
1963	667
1964	458
1965	400
1966	467
1967	789
1968	654
1969	687
1970	614
1971	394
1972	934
1973	683
1974	598
1975	996
1976	746
1977	476
1978	368
1979	857
1980	677
1981	889
1982	658
1983	752
1984	913
1985	516
1986	601
1987	940
1988	1,834
1989	856
1990	847
1991	1,067
1992	1,679
1993	939
1994	777
1995	978
1996	1,075
1997	1,037
1998	1,746
1999	994
2000	1,212
2001	658
2002	828
2003	1,034
2004	697
2005	1,090
2006	774
2007	1,085
2008	580
2009	1,060
2010	852
2011	1,340
2012	1,151
2013	571
2014	434
2015	707
2016	877
2017	954
2018	577
2019	969
2020	519
2021	1,132
2022	774
2023	987
2024	679
2025	1,536
2026	736

Download the Data

Data for records on 1978-06-21: 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 10	243
10 to 20	29
20 to 30	12
30 to 40	5
40 to 50	2
50 to 60	0
60 to 70	2