Weather Records on 21 July 1978

1,155 weather records were set or tied worldwide on 21 July 1978. Highest significance: Buskala Rch, US.

Key Facts for 21 July 1978

On 21 July 1978, 1,155 weather records were set or tied at long-record stations worldwide.
238 were record highs and 294 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 24 monthly and 1,128 daily.
Buskala Rch set a daily record precipitation of 57.4 mm (2.3 in) on 21 July 1978.
Across 159 earlier years (1794 to 2026) the same calendar date averaged 462 records.

Record Map

1,155 stations

1,155 station records on 21 July 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 July 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Buskala Rch	United States	Record daily precipitation	57.4 mm (2.3 in)	62 of 100 (Major)
Guaicara	Brazil	Record daily precipitation	49.2 mm (1.9 in)	56 of 100 (Notable)
Rjazan	Russia	Record daily precipitation	42.3 mm (1.7 in)	56 of 100 (Notable)
Belle Fourche	United States	Record daily precipitation	35.1 mm (1.4 in)	56 of 100 (Notable)
N Bend SW Oregon Rgnl AP	United States	Record high maximum temperature	31.1 C (88.0 F)	55 of 100 (Notable)
Coroados	Brazil	Record daily precipitation	51.7 mm (2.0 in)	53 of 100 (Notable)
Farmingdale 4 N	United States	Record daily precipitation	52.1 mm (2.1 in)	53 of 100 (Notable)
Burkes Garden	United States	Record high minimum temperature	25.0 C (77.0 F)	53 of 100 (Notable)
Panorama	Brazil	Record daily precipitation	50.8 mm (2.0 in)	52 of 100 (Notable)
Union Grove Wwtp	United States	Record daily precipitation	89.2 mm (3.5 in)	52 of 100 (Notable)
Fazenda N.S.Aparecida	Brazil	Record daily precipitation	64.2 mm (2.5 in)	50 of 100 (Notable)
Valparaiso	Brazil	Record daily precipitation	70.1 mm (2.8 in)	49 of 100 (Notable)
Avare	Brazil	Record daily precipitation	53.3 mm (2.1 in)	49 of 100 (Notable)
Concordia ASOS	United States	Record daily precipitation	79.0 mm (3.1 in)	49 of 100 (Notable)
Santa Sofia	Brazil	Record daily precipitation	42.2 mm (1.7 in)	48 of 100 (Notable)
Oelrichs	United States	Record daily precipitation	36.3 mm (1.4 in)	47 of 100 (Notable)
Wasta	United States	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Itajobi	Brazil	Record daily precipitation	27.1 mm (1.1 in)	46 of 100 (Notable)
Fernao Dias	Brazil	Record daily precipitation	35.4 mm (1.4 in)	46 of 100 (Notable)
Marilia	Brazil	Record daily precipitation	47.2 mm (1.9 in)	46 of 100 (Notable)
Agate 3 E	United States	Record daily precipitation	61.0 mm (2.4 in)	46 of 100 (Notable)
Mirassol	Brazil	Record daily precipitation	28.7 mm (1.1 in)	45 of 100 (Notable)
Newport	United States	Record daily precipitation	87.4 mm (3.4 in)	45 of 100 (Notable)
Tiete	Brazil	Record daily precipitation	37.7 mm (1.5 in)	44 of 100 (Notable)
Alto Alegre	Brazil	Record daily precipitation	33.2 mm (1.3 in)	44 of 100 (Notable)
Cosamaloapan de Carpio (Smn)	Mexico	Record daily precipitation	174.0 mm (6.9 in)	44 of 100 (Notable)
Fazenda Aterradinho	Brazil	Record daily precipitation	48.6 mm (1.9 in)	43 of 100 (Notable)
Maine-Sorda	Niger	Record daily precipitation	63.8 mm (2.5 in)	43 of 100 (Notable)
Purdum	United States	Record daily precipitation	68.1 mm (2.7 in)	43 of 100 (Notable)
Fazenda Ano Bom Do Tiete	Brazil	Record daily precipitation	37.4 mm (1.5 in)	42 of 100 (Notable)
Nova Fatima	Brazil	Record daily precipitation	48.6 mm (1.9 in)	42 of 100 (Notable)
Angatuba	Brazil	Record daily precipitation	48.0 mm (1.9 in)	42 of 100 (Notable)
Ellsworth 2W	United States	Record daily precipitation	50.3 mm (2.0 in)	42 of 100 (Notable)
Lead	United States	Record daily precipitation	40.4 mm (1.6 in)	42 of 100 (Notable)
Ribeirao Do Sul	Brazil	Record daily precipitation	28.5 mm (1.1 in)	41 of 100 (Notable)
Centerville 6 SE	United States	Record daily precipitation	45.2 mm (1.8 in)	41 of 100 (Notable)
Pedro Barros	Brazil	Record daily precipitation	45.6 mm (1.8 in)	40 of 100 (Notable)
Fazenda Chantebled	Brazil	Record daily precipitation	47.3 mm (1.9 in)	40 of 100 (Notable)
Rinopolis	Brazil	Record daily precipitation	37.4 mm (1.5 in)	40 of 100 (Notable)
Dois Corregos	Brazil	Record daily precipitation	30.0 mm (1.2 in)	40 of 100 (Notable)
Quata	Brazil	Record daily precipitation	40.8 mm (1.6 in)	40 of 100 (Notable)
Antioch	United States	Record daily precipitation	68.6 mm (2.7 in)	40 of 100 (Notable)
Bloomingdale	United States	Record daily precipitation	66.3 mm (2.6 in)	40 of 100 (Notable)
White Lake	United States	Record daily precipitation	53.8 mm (2.1 in)	40 of 100 (Notable)
Rochelle 7ENE	United States	Record daily precipitation	36.6 mm (1.4 in)	40 of 100 (Notable)
Norfolk Karl Stefan Mem AP	United States	Record daily precipitation	56.6 mm (2.2 in)	40 of 100 (Notable)
Fazenda Bom Retiro	Brazil	Record daily precipitation	27.3 mm (1.1 in)	39 of 100 (Notable)
Uplo	Sweden	Record daily precipitation	39.0 mm (1.5 in)	39 of 100 (Notable)
Deadwood	United States	Record daily precipitation	43.2 mm (1.7 in)	39 of 100 (Notable)
Bady Bassit	Brazil	Record daily precipitation	33.6 mm (1.3 in)	38 of 100 (Notable)
Urupes	Brazil	Record daily precipitation	33.4 mm (1.3 in)	38 of 100 (Notable)
Penapolis	Brazil	Record daily precipitation	37.4 mm (1.5 in)	38 of 100 (Notable)
Tupa	Brazil	Record daily precipitation	38.2 mm (1.5 in)	38 of 100 (Notable)
Carroll	United States	Record daily precipitation	43.9 mm (1.7 in)	38 of 100 (Notable)
Spencer 1 N	United States	Record daily precipitation	41.4 mm (1.6 in)	38 of 100 (Notable)
Glen Warren	Australia	Record daily precipitation	40.6 mm (1.6 in)	37 of 100 (Notable)
Lussanvira	Brazil	Record daily precipitation	30.0 mm (1.2 in)	37 of 100 (Notable)
Fazenda Barreirinho	Brazil	Record daily precipitation	40.2 mm (1.6 in)	37 of 100 (Notable)
Ibitinga	Brazil	Record daily precipitation	35.3 mm (1.4 in)	37 of 100 (Notable)
Catigua	Brazil	Record daily precipitation	34.4 mm (1.4 in)	37 of 100 (Notable)

Counts by Type and Timescale

1,155 records

Records set or tied on 21 July 1978 by type: Highest daily maximum 117, Lowest daily maximum 232, Highest daily minimum 121, Lowest daily minimum 62, Heaviest daily rainfall 623.

Records on 21 July 1978 by type
Record type	Records
Highest daily maximum	117
Lowest daily maximum	232
Highest daily minimum	121
Lowest daily minimum	62
Heaviest daily rainfall	623
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 July 1978 by timescale: all-time 3, monthly 24, daily 1,128.

How Much Records Were Beaten By

993 broken records

Margins by which the 993 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 81.3. Ties are not counted.

Top 20 by Significance

21 July 1978

Top 20 records on 21 July 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 July 1978	Buskala Rch, US	daily rain	57.4 mm (2.3 in)	42.2 mm (1.7 in)	51 years	62 of 100 (Major)
21 July 1978	Guaicara, BR	daily rain	49.2 mm (1.9 in)	49.2 mm (1.9 in)	40 years	56 of 100 (Notable)
21 July 1978	Rjazan, RU	daily rain	42.3 mm (1.7 in)	34.2 mm (1.3 in)	36 years	56 of 100 (Notable)
21 July 1978	Belle Fourche, US	daily rain	35.1 mm (1.4 in)	25.4 mm (1.0 in)	51 years	56 of 100 (Notable)
21 July 1978	N Bend SW Oregon Rgnl AP, US	daily high max	31.1 C (88.0 F)	6.1 C (11.0 F)	60 years	55 of 100 (Notable)
21 July 1978	Coroados, BR	daily rain	51.7 mm (2.0 in)	51.7 mm (2.0 in)	33 years	53 of 100 (Notable)
21 July 1978	Farmingdale 4 N, US	daily rain	52.1 mm (2.1 in)	45.0 mm (1.8 in)	19 years	53 of 100 (Notable)
21 July 1978	Burkes Garden, US	all-time high min	25.0 C (77.0 F)	0.6 C (1.1 F)	80 years	53 of 100 (Notable)
21 July 1978	Panorama, BR	daily rain	50.8 mm (2.0 in)	50.8 mm (2.0 in)	32 years	52 of 100 (Notable)
21 July 1978	Union Grove Wwtp, US	daily rain	89.2 mm (3.5 in)	81.3 mm (3.2 in)	32 years	52 of 100 (Notable)
21 July 1978	Fazenda N.S.Aparecida, BR	daily rain	64.2 mm (2.5 in)	63.7 mm (2.5 in)	20 years	50 of 100 (Notable)
21 July 1978	Valparaiso, BR	monthly rain	70.1 mm (2.8 in)	29.6 mm (1.2 in)	29 years	49 of 100 (Notable)
21 July 1978	Avare, BR	daily rain	53.3 mm (2.1 in)	47.2 mm (1.9 in)	39 years	49 of 100 (Notable)
21 July 1978	Concordia ASOS, US	daily rain	79.0 mm (3.1 in)	59.9 mm (2.4 in)	0 years	49 of 100 (Notable)
21 July 1978	Santa Sofia, BR	daily rain	42.2 mm (1.7 in)	37.2 mm (1.5 in)	21 years	48 of 100 (Notable)
21 July 1978	Oelrichs, US	daily rain	36.3 mm (1.4 in)	16.0 mm (0.6 in)	83 years	47 of 100 (Notable)
21 July 1978	Wasta, US	daily rain	41.4 mm (1.6 in)	37.1 mm (1.5 in)	12 years	47 of 100 (Notable)
21 July 1978	Itajobi, BR	daily rain	27.1 mm (1.1 in)	26.9 mm (1.1 in)	32 years	46 of 100 (Notable)
21 July 1978	Fernao Dias, BR	daily rain	35.4 mm (1.4 in)	33.4 mm (1.3 in)	39 years	46 of 100 (Notable)
21 July 1978	Marilia, BR	daily rain	47.2 mm (1.9 in)	39.3 mm (1.5 in)	39 years	46 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

1794 to 1978

Records set or tied on this calendar date in each year from 1794 to 1978. 1978 had 1,155 records.

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

Records on 07-21 in each year
Year	Records
1794	1
1795	1
1796	1
1797	1
1813	2
1832	2
1837	1
1839	1
1843	1
1844	2
1854	1
1859	3
1865	3
1868	3
1872	1
1876	1
1879	2
1880	1
1881	1
1884	1
1885	1
1886	2
1888	2
1889	3
1890	2
1892	3
1893	3
1894	3
1895	1
1896	3
1897	4
1898	7
1899	2
1900	6
1901	13
1902	12
1903	10
1904	8
1905	13
1906	13
1907	12
1908	25
1909	18
1910	12
1911	37
1912	52
1913	41
1914	48
1915	81
1916	72
1917	136
1918	130
1919	51
1920	33
1921	55
1922	48
1923	132
1924	286
1925	202
1926	401
1927	191
1928	205
1929	360
1930	521
1931	549
1932	322
1933	208
1934	965
1935	236
1936	322
1937	253
1938	638
1939	415
1940	318
1941	226
1942	318
1943	253
1944	716
1945	300
1946	398
1947	795
1948	403
1949	603
1950	662
1951	427
1952	657
1953	351
1954	656
1955	582
1956	490
1957	447
1958	531
1959	940
1960	651
1961	388
1962	263
1963	470
1964	457
1965	748
1966	626
1967	313
1968	334
1969	636
1970	1,241
1971	475
1972	1,046
1973	871
1974	536
1975	380
1976	477
1977	708
1978	1,155
1979	964
1980	926
1981	1,352
1982	588
1983	1,234
1984	764
1985	554
1986	791
1987	1,025
1988	1,015
1989	973
1990	914
1991	812
1992	1,562
1993	866
1994	773
1995	1,247
1996	1,141
1997	849
1998	1,674
1999	814
2000	1,230
2001	889
2002	990
2003	1,250
2004	694
2005	1,420
2006	1,479
2007	1,145
2008	989
2009	1,306
2010	1,148
2011	1,414
2012	815
2013	526
2014	762
2015	704
2016	645
2017	433
2018	942
2019	755
2020	363
2021	574
2022	866
2023	816
2024	873
2025	881
2026	874

Download the Data

Data for records on 1978-07-21: 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 20	858
20 to 40	121
40 to 60	12
60 to 80	1
80 to 100	1