Weather Records on 12 July 1978

635 weather records were set or tied worldwide on 12 July 1978. Highest significance: Biedenkopf, DE.

Key Facts for 12 July 1978

On 12 July 1978, 635 weather records were set or tied at long-record stations worldwide.
107 were record highs and 395 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 14 monthly and 618 daily.
Biedenkopf set a daily record precipitation of 38.6 mm (1.5 in) on 12 July 1978.
Across 158 earlier years (1796 to 2026) the same calendar date averaged 451 records.

Record Map

635 stations

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

Weather records on 12 July 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Biedenkopf	Germany	Record daily precipitation	38.6 mm (1.5 in)	52 of 100 (Notable)
Brunswick-McKinnon AP	United States	Record daily precipitation	84.3 mm (3.3 in)	51 of 100 (Notable)
Coloso	Puerto Rico [United States]	Record low maximum temperature	27.8 C (82.0 F)	50 of 100 (Notable)
Fisk	United States	Record daily precipitation	113.3 mm (4.5 in)	48 of 100 (Notable)
Port Stanley	Canada	Record low minimum temperature	4.5 C (40.1 F)	41 of 100 (Notable)
Arjeplog A	Sweden	Record daily precipitation	33.1 mm (1.3 in)	40 of 100 (Notable)
Vladivostok	Russia	Record daily precipitation	41.7 mm (1.6 in)	39 of 100 (Notable)
Atlantic City Marina	United States	Record low minimum temperature	13.3 C (55.9 F)	38 of 100 (Notable)
Blunt	United States	Record daily precipitation	36.3 mm (1.4 in)	37 of 100 (Notable)
Adrian 2 NNE	United States	Record low minimum temperature	8.3 C (46.9 F)	36 of 100 (Notable)
Arcade	United States	Record low maximum temperature	19.4 C (66.9 F)	36 of 100 (Notable)
Kuusiku	Estonia	Record daily precipitation	33.7 mm (1.3 in)	35 of 100 (Notable)
Alicia 2 NNE	United States	Record daily precipitation	57.9 mm (2.3 in)	35 of 100 (Notable)
Milford 2 SE	United States	Record low minimum temperature	10.6 C (51.1 F)	35 of 100 (Notable)
Adams	United States	Record low maximum temperature	19.4 C (66.9 F)	35 of 100 (Notable)
St Charles Elm Pt	United States	Record low maximum temperature	24.4 C (75.9 F)	35 of 100 (Notable)
Charlottesville 2W	United States	Record low minimum temperature	11.7 C (53.1 F)	35 of 100 (Notable)
Ksenevskaja	Russia	Record daily precipitation	70.0 mm (2.8 in)	34 of 100 (Routine)
Townsville Aero	Australia	Record low maximum temperature	20.2 C (68.4 F)	33 of 100 (Routine)
Tasiilaq	Greenland [Denmark]	Record high minimum temperature	10.0 C (50.0 F)	33 of 100 (Routine)
Greencastle 1 W	United States	Record low maximum temperature	21.7 C (71.1 F)	33 of 100 (Routine)
Hagerstown	United States	Record low maximum temperature	26.1 C (79.0 F)	33 of 100 (Routine)
Warrenton 1 N	United States	Record low maximum temperature	23.3 C (73.9 F)	33 of 100 (Routine)
Norwalk Wwtp	United States	Record low minimum temperature	7.2 C (45.0 F)	33 of 100 (Routine)
Oberlin	United States	Record low minimum temperature	6.7 C (44.1 F)	33 of 100 (Routine)
Upper Sandusky	United States	Record low minimum temperature	7.8 C (46.0 F)	33 of 100 (Routine)
Warren	United States	Record low minimum temperature	3.9 C (39.0 F)	33 of 100 (Routine)
Hillsdale	United States	Record low minimum temperature	6.7 C (44.1 F)	32 of 100 (Routine)
Rolla Missouri S&T	United States	Record daily precipitation	39.4 mm (1.6 in)	32 of 100 (Routine)
Tiffin	United States	Record low minimum temperature	8.9 C (48.0 F)	32 of 100 (Routine)
Bedford	United States	Record daily precipitation	85.6 mm (3.4 in)	31 of 100 (Routine)
Haverhill	United States	Record low minimum temperature	11.1 C (52.0 F)	31 of 100 (Routine)
Winona	United States	Record low maximum temperature	21.1 C (70.0 F)	31 of 100 (Routine)
Beulah 1 W	United States	Record daily precipitation	31.0 mm (1.2 in)	31 of 100 (Routine)
Dodge City	United States	Record high minimum temperature	27.2 C (81.0 F)	31 of 100 (Routine)
Wrixum/Fohr	Germany	Record low maximum temperature	14.5 C (58.1 F)	30 of 100 (Routine)
Cave Run Lake	United States	Record low maximum temperature	24.4 C (75.9 F)	30 of 100 (Routine)
Pontiac Wwtp	United States	Record low minimum temperature	9.4 C (48.9 F)	30 of 100 (Routine)
Mexico	United States	Record low maximum temperature	22.2 C (72.0 F)	30 of 100 (Routine)
Parkton 2 SW	United States	Record low minimum temperature	7.8 C (46.0 F)	29 of 100 (Routine)
Salem	United States	Record daily precipitation	33.5 mm (1.3 in)	29 of 100 (Routine)
Te Kowai Exp STN	Australia	Record low maximum temperature	18.0 C (64.4 F)	28 of 100 (Routine)
Pelee Island	Canada	Record low minimum temperature	10.0 C (50.0 F)	28 of 100 (Routine)
Homberg/Ohm	Germany	Record daily precipitation	25.4 mm (1.0 in)	28 of 100 (Routine)
St Cloud Rgnl AP	United States	Record daily precipitation	33.0 mm (1.3 in)	28 of 100 (Routine)
Cape Leeuwin	Australia	Record low minimum temperature	7.0 C (44.6 F)	27 of 100 (Routine)
Sao Jose de Mipibu	Brazil	Record daily precipitation	46.5 mm (1.8 in)	27 of 100 (Routine)
Apizaco	Mexico	Record daily precipitation	26.4 mm (1.0 in)	27 of 100 (Routine)
Farmland 5 NNW	United States	Record low maximum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Greenville 2 NNE	United States	Record low minimum temperature	6.1 C (43.0 F)	27 of 100 (Routine)
Put-In-Bay	United States	Record low minimum temperature	12.2 C (54.0 F)	27 of 100 (Routine)
Parsons 3 SE	United States	Record low maximum temperature	20.6 C (69.1 F)	27 of 100 (Routine)
Kochki	Russia	Record daily precipitation	31.1 mm (1.2 in)	26 of 100 (Routine)
Whitestown	United States	Record low maximum temperature	23.3 C (73.9 F)	26 of 100 (Routine)
Cheboygan	United States	Record low minimum temperature	6.7 C (44.1 F)	26 of 100 (Routine)
Fulton	United States	Record low maximum temperature	23.3 C (73.9 F)	26 of 100 (Routine)
Lebanon 2W	United States	Record daily precipitation	59.4 mm (2.3 in)	26 of 100 (Routine)
Kenton	United States	Record low minimum temperature	5.6 C (42.1 F)	26 of 100 (Routine)
Charters Towers Post Office	Australia	Record low maximum temperature	17.4 C (63.3 F)	25 of 100 (Routine)
Fort Resolution A	Canada	Record low minimum temperature	0.5 C (32.9 F)	25 of 100 (Routine)

Counts by Type and Timescale

635 records

Records set or tied on 12 July 1978 by type: Highest daily maximum 29, Lowest daily maximum 140, Highest daily minimum 78, Lowest daily minimum 255, Heaviest daily rainfall 133.

Records on 12 July 1978 by type
Record type	Records
Highest daily maximum	29
Lowest daily maximum	140
Highest daily minimum	78
Lowest daily minimum	255
Heaviest daily rainfall	133
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 July 1978 by timescale: all-time 3, monthly 14, daily 618.

How Much Records Were Beaten By

440 broken records

Margins by which the 440 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 95.5. Ties are not counted.

Top 20 by Significance

12 July 1978

Top 20 records on 12 July 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 July 1978	Biedenkopf, DE	daily rain	38.6 mm (1.5 in)	23.0 mm (0.9 in)	45 years	52 of 100 (Notable)
12 July 1978	Brunswick-McKinnon AP, US	daily rain	84.3 mm (3.3 in)	71.6 mm (2.8 in)	29 years	51 of 100 (Notable)
12 July 1978	Coloso, PR	daily low max	27.8 C (82.0 F)	2.2 C (4.0 F)	68 years	50 of 100 (Notable)
12 July 1978	Fisk, US	daily rain	113.3 mm (4.5 in)	95.5 mm (3.8 in)	13 years	48 of 100 (Notable)
12 July 1978	Port Stanley, CA	daily low min	4.5 C (40.1 F)	1.6 C (2.9 F)	91 years	41 of 100 (Notable)
12 July 1978	Arjeplog A, SE	daily rain	33.1 mm (1.3 in)	18.6 mm (0.7 in)	27 years	40 of 100 (Notable)
12 July 1978	Vladivostok, RU	daily rain	41.7 mm (1.6 in)	27.6 mm (1.1 in)	35 years	39 of 100 (Notable)
12 July 1978	Atlantic City Marina, US	daily low min	13.3 C (55.9 F)	0.6 C (1.1 F)	87 years	38 of 100 (Notable)
12 July 1978	Blunt, US	daily rain	36.3 mm (1.4 in)	31.7 mm (1.2 in)	21 years	37 of 100 (Notable)
12 July 1978	Adrian 2 NNE, US	daily low min	8.3 C (46.9 F)	0.6 C (1.1 F)	89 years	36 of 100 (Notable)
12 July 1978	Arcade, US	daily low max	19.4 C (66.9 F)	1.7 C (3.1 F)	80 years	36 of 100 (Notable)
12 July 1978	Kuusiku, EE	daily rain	33.7 mm (1.3 in)	18.1 mm (0.7 in)	24 years	35 of 100 (Notable)
12 July 1978	Alicia 2 NNE, US	daily rain	57.9 mm (2.3 in)	35.3 mm (1.4 in)	28 years	35 of 100 (Notable)
12 July 1978	Milford 2 SE, US	daily low min	10.6 C (51.1 F)	1.1 C (2.0 F)	82 years	35 of 100 (Notable)
12 July 1978	Adams, US	daily low max	19.4 C (66.9 F)	1.7 C (3.1 F)	79 years	35 of 100 (Notable)
12 July 1978	St Charles Elm Pt, US	daily low max	24.4 C (75.9 F)	1.2 C (2.2 F)	82 years	35 of 100 (Notable)
12 July 1978	Charlottesville 2W, US	daily low min	11.7 C (53.1 F)	1.1 C (2.0 F)	79 years	35 of 100 (Notable)
12 July 1978	Ksenevskaja, RU	all-time rain	70.0 mm (2.8 in)	0.9 mm (0.04 in)	36 years	34 of 100 (Routine)
12 July 1978	Townsville Aero, AU	daily low max	20.2 C (68.4 F)	3.2 C (5.8 F)	36 years	33 of 100 (Routine)
12 July 1978	Tasiilaq, GL	daily high min	10.0 C (50.0 F)	0.5 C (0.9 F)	79 years	33 of 100 (Routine)

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

1796 to 1978

Records set or tied on this calendar date in each year from 1796 to 1978. 1978 had 635 records.

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

Records on 07-12 in each year
Year	Records
1796	1
1816	1
1821	2
1841	1
1847	2
1848	2
1850	3
1851	1
1858	1
1860	2
1866	1
1870	2
1873	1
1874	2
1875	1
1876	2
1879	1
1880	2
1882	1
1886	4
1887	1
1888	4
1889	1
1890	4
1891	3
1892	2
1893	1
1894	4
1895	7
1896	3
1897	2
1898	1
1900	2
1901	5
1902	2
1903	11
1904	13
1905	28
1906	22
1907	19
1908	46
1909	24
1910	12
1911	93
1912	19
1913	20
1914	57
1915	16
1916	39
1917	163
1918	99
1919	56
1920	37
1921	94
1922	42
1923	85
1924	68
1925	231
1926	272
1927	84
1928	79
1929	137
1930	561
1931	309
1932	305
1933	609
1934	348
1935	379
1936	1,082
1937	353
1938	257
1939	509
1940	623
1941	796
1942	363
1943	421
1944	446
1945	1,118
1946	234
1947	319
1948	379
1949	357
1950	485
1951	765
1952	680
1953	688
1954	907
1955	263
1956	474
1957	381
1958	434
1959	459
1960	466
1961	606
1962	447
1963	418
1964	898
1965	457
1966	614
1967	502
1968	466
1969	745
1970	298
1971	538
1972	716
1973	633
1974	617
1975	1,321
1976	812
1977	377
1978	635
1979	555
1980	998
1981	645
1982	526
1983	955
1984	871
1985	558
1986	1,015
1987	1,189
1988	961
1989	559
1990	1,489
1991	1,028
1992	1,167
1993	1,443
1994	904
1995	1,070
1996	964
1997	800
1998	1,244
1999	1,397
2000	796
2001	856
2002	1,537
2003	910
2004	799
2005	1,068
2006	1,038
2007	749
2008	719
2009	707
2010	1,450
2011	1,468
2012	979
2013	570
2014	437
2015	618
2016	740
2017	586
2018	398
2019	598
2020	875
2021	830
2022	507
2023	839
2024	968
2025	567
2026	1,100

Download the Data

Data for records on 1978-07-12: 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 20	429
20 to 40	9
40 to 60	0
60 to 80	1
80 to 100	1