Weather Records on 15 August 1978

841 weather records were set or tied worldwide on 15 August 1978. Highest significance: Dillon, US.

Key Facts for 15 August 1978

On 15 August 1978, 841 weather records were set or tied at long-record stations worldwide.
225 were record highs and 276 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 27 monthly and 813 daily.
Dillon set a daily record precipitation of 85.1 mm (3.4 in) on 15 August 1978.
Across 168 earlier years (1793 to 2026) the same calendar date averaged 452 records.

Record Map

841 stations

841 station records on 15 August 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 August 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dillon	United States	Record daily precipitation	85.1 mm (3.4 in)	65 of 100 (Major)
Ft Ripley	United States	Record daily precipitation	127.0 mm (5.0 in)	63 of 100 (Major)
Mount Wellington (the Springs)	Australia	Record daily precipitation	109.6 mm (4.3 in)	62 of 100 (Major)
Onawa 3NW	United States	Record daily precipitation	79.8 mm (3.1 in)	55 of 100 (Notable)
Oakdale	United States	Record daily precipitation	77.0 mm (3.0 in)	55 of 100 (Notable)
Walthill 1E	United States	Record daily precipitation	66.0 mm (2.6 in)	55 of 100 (Notable)
Neah Bay 1 E	United States	Record daily precipitation	50.8 mm (2.0 in)	55 of 100 (Notable)
Spooner Ag Rsch STN	United States	Record daily precipitation	83.1 mm (3.3 in)	55 of 100 (Notable)
Begumpet Obsy	India	Record daily precipitation	110.0 mm (4.3 in)	54 of 100 (Notable)
Elgin	United States	Record daily precipitation	116.3 mm (4.6 in)	54 of 100 (Notable)
Longmire Rainier Nps	United States	Record daily precipitation	41.9 mm (1.6 in)	54 of 100 (Notable)
Southport	Australia	Record daily precipitation	38.0 mm (1.5 in)	53 of 100 (Notable)
Lyons	United States	Record daily precipitation	55.4 mm (2.2 in)	53 of 100 (Notable)
Rhinelander	United States	Record daily precipitation	88.4 mm (3.5 in)	52 of 100 (Notable)
Eagle Bay	Canada	Record daily precipitation	44.4 mm (1.7 in)	50 of 100 (Notable)
Akron 4 E	United States	Record daily precipitation	50.0 mm (2.0 in)	50 of 100 (Notable)
Randolph	United States	Record daily precipitation	70.4 mm (2.8 in)	49 of 100 (Notable)
Breakwater	United States	Record daily precipitation	66.3 mm (2.6 in)	49 of 100 (Notable)
Honaunau 27	United States	Record daily precipitation	89.9 mm (3.5 in)	49 of 100 (Notable)
Ericson 8 WNW	United States	Record daily precipitation	49.5 mm (1.9 in)	48 of 100 (Notable)
Mobridge 2NNW	United States	Record daily precipitation	39.4 mm (1.6 in)	48 of 100 (Notable)
Iron Mtn-Kingsford Wwtp	United States	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Bayfield 6 N	United States	Record daily precipitation	55.9 mm (2.2 in)	47 of 100 (Notable)
Kainaliu 73.2	United States	Record daily precipitation	82.3 mm (3.2 in)	47 of 100 (Notable)
Butte	United States	Record daily precipitation	51.3 mm (2.0 in)	46 of 100 (Notable)
Madison	United States	Record daily precipitation	47.5 mm (1.9 in)	46 of 100 (Notable)
Walla Walla WSO City	United States	Record daily precipitation	31.8 mm (1.3 in)	46 of 100 (Notable)
Homer 3NE	United States	Record daily precipitation	64.3 mm (2.5 in)	45 of 100 (Notable)
Red Lake Falls	United States	Record daily precipitation	62.2 mm (2.4 in)	44 of 100 (Notable)
Emerson	United States	Record daily precipitation	53.3 mm (2.1 in)	44 of 100 (Notable)
Pecos	United States	Record daily precipitation	34.8 mm (1.4 in)	44 of 100 (Notable)
Spanish Fk Pwr House	United States	Record low minimum temperature	5.0 C (41.0 F)	44 of 100 (Notable)
Albion	United States	Record daily precipitation	79.8 mm (3.1 in)	43 of 100 (Notable)
Stanton	United States	Record daily precipitation	61.0 mm (2.4 in)	43 of 100 (Notable)
Wakefield 3NW	United States	Record daily precipitation	49.0 mm (1.9 in)	43 of 100 (Notable)
Satrovo	Russia	Record daily precipitation	37.8 mm (1.5 in)	42 of 100 (Notable)
Ust-Hairyuzovo	Russia	Record daily precipitation	39.6 mm (1.6 in)	42 of 100 (Notable)
Cottonwood 2 E	United States	Record daily precipitation	40.1 mm (1.6 in)	42 of 100 (Notable)
Byro	Australia	Record daily precipitation	25.0 mm (1.0 in)	41 of 100 (Notable)
Aitkin 2E	United States	Record daily precipitation	72.9 mm (2.9 in)	41 of 100 (Notable)
Tekamah	United States	Record daily precipitation	68.6 mm (2.7 in)	41 of 100 (Notable)
Darkwater	Australia	Record daily precipitation	41.0 mm (1.6 in)	40 of 100 (Notable)
Parnu	Estonia	Record low minimum temperature	5.7 C (42.3 F)	40 of 100 (Notable)
Leroy 5 WSW	United States	Record low minimum temperature	8.3 C (46.9 F)	40 of 100 (Notable)
Creighton	United States	Record daily precipitation	46.5 mm (1.8 in)	40 of 100 (Notable)
Linton	United States	Record daily precipitation	43.2 mm (1.7 in)	40 of 100 (Notable)
Armour	United States	Record daily precipitation	54.1 mm (2.1 in)	40 of 100 (Notable)
Highmore	United States	Record daily precipitation	58.7 mm (2.3 in)	40 of 100 (Notable)
Manti	United States	Record low minimum temperature	3.3 C (37.9 F)	40 of 100 (Notable)
Rainer Ohanapecosh	United States	Record daily precipitation	34.5 mm (1.4 in)	40 of 100 (Notable)
Tartu	Estonia	Record low minimum temperature	1.7 C (35.1 F)	39 of 100 (Notable)
Nord Odal	Norway	Record daily precipitation	36.2 mm (1.4 in)	39 of 100 (Notable)
Alton	United States	Record daily precipitation	39.6 mm (1.6 in)	39 of 100 (Notable)
Lenora Coop	United States	Record daily precipitation	63.5 mm (2.5 in)	39 of 100 (Notable)
Lake City 2 SE	United States	Record daily precipitation	71.9 mm (2.8 in)	39 of 100 (Notable)
Kljuchi	Russia	Record daily precipitation	25.8 mm (1.0 in)	38 of 100 (Notable)
Canon City	United States	Record low minimum temperature	5.0 C (41.0 F)	38 of 100 (Notable)
Holyoke	United States	Record low minimum temperature	6.7 C (44.1 F)	38 of 100 (Notable)
Halsey 2 W	United States	Record daily precipitation	48.8 mm (1.9 in)	38 of 100 (Notable)
Wayne	United States	Record daily precipitation	43.2 mm (1.7 in)	38 of 100 (Notable)

Counts by Type and Timescale

841 records

Records set or tied on 15 August 1978 by type: Highest daily maximum 79, Lowest daily maximum 83, Highest daily minimum 146, Lowest daily minimum 193, Heaviest daily rainfall 339, Heaviest daily snowfall 1.

Records on 15 August 1978 by type
Record type	Records
Highest daily maximum	79
Lowest daily maximum	83
Highest daily minimum	146
Lowest daily minimum	193
Heaviest daily rainfall	339
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 15 August 1978 by timescale: all-time 1, monthly 27, daily 813.

How Much Records Were Beaten By

684 broken records

Margins by which the 684 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 85.1. Ties are not counted.

Top 20 by Significance

15 August 1978

Top 20 records on 15 August 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 August 1978	Dillon, US	daily rain	85.1 mm (3.4 in)	67.1 mm (2.6 in)	60 years	65 of 100 (Major)
15 August 1978	Ft Ripley, US	daily rain	127.0 mm (5.0 in)	85.1 mm (3.4 in)	49 years	63 of 100 (Major)
15 August 1978	Mount Wellington (the Springs), AU	daily rain	109.6 mm (4.3 in)	81.7 mm (3.2 in)	48 years	62 of 100 (Major)
15 August 1978	Onawa 3NW, US	daily rain	79.8 mm (3.1 in)	34.1 mm (1.3 in)	77 years	55 of 100 (Notable)
15 August 1978	Oakdale, US	daily rain	77.0 mm (3.0 in)	48.6 mm (1.9 in)	28 years	55 of 100 (Notable)
15 August 1978	Walthill 1E, US	daily rain	66.0 mm (2.6 in)	53.6 mm (2.1 in)	27 years	55 of 100 (Notable)
15 August 1978	Neah Bay 1 E, US	daily rain	50.8 mm (2.0 in)	33.0 mm (1.3 in)	33 years	55 of 100 (Notable)
15 August 1978	Spooner Ag Rsch STN, US	daily rain	83.1 mm (3.3 in)	50.8 mm (2.0 in)	24 years	55 of 100 (Notable)
15 August 1978	Begumpet Obsy, IN	daily rain	110.0 mm (4.3 in)	63.0 mm (2.5 in)	24 years	54 of 100 (Notable)
15 August 1978	Elgin, US	daily rain	116.3 mm (4.6 in)	60.2 mm (2.4 in)	29 years	54 of 100 (Notable)
15 August 1978	Longmire Rainier Nps, US	daily rain	41.9 mm (1.6 in)	24.1 mm (0.9 in)	65 years	54 of 100 (Notable)
15 August 1978	Southport, AU	daily rain	38.0 mm (1.5 in)	16.4 mm (0.6 in)	55 years	53 of 100 (Notable)
15 August 1978	Lyons, US	daily rain	55.4 mm (2.2 in)	28.7 mm (1.1 in)	77 years	53 of 100 (Notable)
15 August 1978	Rhinelander, US	daily rain	88.4 mm (3.5 in)	52.8 mm (2.1 in)	16 years	52 of 100 (Notable)
15 August 1978	Eagle Bay, CA	daily rain	44.4 mm (1.7 in)	24.8 mm (1.0 in)	32 years	50 of 100 (Notable)
15 August 1978	Akron 4 E, US	daily rain	50.0 mm (2.0 in)	35.5 mm (1.4 in)	51 years	50 of 100 (Notable)
15 August 1978	Randolph, US	daily rain	70.4 mm (2.8 in)	54.4 mm (2.1 in)	24 years	49 of 100 (Notable)
15 August 1978	Breakwater, US	daily rain	66.3 mm (2.6 in)	33.3 mm (1.3 in)	53 years	49 of 100 (Notable)
15 August 1978	Honaunau 27, US	monthly rain	89.9 mm (3.5 in)	25.4 mm (1.0 in)	12 years	49 of 100 (Notable)
15 August 1978	Ericson 8 WNW, US	daily rain	49.5 mm (1.9 in)	30.4 mm (1.2 in)	55 years	48 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

1793 to 1978

Records set or tied on this calendar date in each year from 1793 to 1978. 1978 had 841 records.

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

Records on 08-15 in each year
Year	Records
1793	2
1802	1
1805	1
1812	1
1821	1
1838	2
1839	1
1841	1
1844	1
1845	3
1852	1
1854	1
1856	1
1858	1
1861	3
1867	1
1868	2
1869	1
1873	2
1875	1
1876	2
1877	1
1878	1
1879	1
1880	3
1881	2
1882	2
1883	1
1884	2
1885	3
1886	1
1887	1
1888	3
1890	2
1891	2
1892	3
1893	3
1895	1
1896	9
1897	3
1898	1
1899	2
1900	6
1901	5
1902	10
1903	5
1904	17
1905	26
1906	8
1907	14
1908	15
1909	30
1910	16
1911	26
1912	34
1913	42
1914	11
1915	26
1916	223
1917	32
1918	23
1919	22
1920	59
1921	55
1922	86
1923	116
1924	220
1925	91
1926	115
1927	223
1928	271
1929	586
1930	274
1931	351
1932	368
1933	268
1934	992
1935	414
1936	867
1937	574
1938	681
1939	450
1940	372
1941	289
1942	377
1943	426
1944	610
1945	433
1946	285
1947	559
1948	366
1949	559
1950	317
1951	597
1952	596
1953	449
1954	481
1955	539
1956	390
1957	355
1958	1,092
1959	515
1960	417
1961	704
1962	1,052
1963	972
1964	1,185
1965	535
1966	340
1967	687
1968	1,002
1969	583
1970	382
1971	899
1972	613
1973	499
1974	512
1975	490
1976	1,345
1977	550
1978	841
1979	1,788
1980	745
1981	588
1982	479
1983	955
1984	622
1985	915
1986	1,283
1987	1,098
1988	1,479
1989	495
1990	758
1991	778
1992	1,638
1993	831
1994	1,073
1995	1,298
1996	929
1997	927
1998	861
1999	956
2000	932
2001	1,254
2002	1,307
2003	1,248
2004	1,424
2005	1,067
2006	923
2007	1,317
2008	964
2009	1,038
2010	1,622
2011	770
2012	654
2013	711
2014	583
2015	759
2016	707
2017	532
2018	328
2019	435
2020	1,327
2021	900
2022	692
2023	1,414
2024	729
2025	772
2026	975

Download the Data

Data for records on 1978-08-15: 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	609
20 to 40	58
40 to 60	12
60 to 80	3
80 to 100	2