Weather Records on 11 August 1978

433 weather records were set or tied worldwide on 11 August 1978. Highest significance: Casterton (Roseneath), AU.

Key Facts for 11 August 1978

On 11 August 1978, 433 weather records were set or tied at long-record stations worldwide.
128 were record highs and 150 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 8 monthly and 424 daily.
Casterton (Roseneath) set an all-time record daily precipitation of 115.0 mm (4.5 in) on 11 August 1978.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 461 records.

Record Map

433 stations

433 station records on 11 August 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 August 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Casterton (Roseneath)	Australia	Record daily precipitation	115.0 mm (4.5 in)	64 of 100 (Major)
Lake Crescent (Serat)	Australia	Record daily precipitation	48.0 mm (1.9 in)	60 of 100 (Major)
Lencois	Brazil	Record daily precipitation	35.6 mm (1.4 in)	55 of 100 (Notable)
Piaxtla	Mexico	Record daily precipitation	159.8 mm (6.3 in)	54 of 100 (Notable)
Stillwater Power House	Canada	Record daily precipitation	58.4 mm (2.3 in)	50 of 100 (Notable)
Sala Rch	United States	Record daily precipitation	72.4 mm (2.9 in)	50 of 100 (Notable)
Elliston	Australia	Record daily precipitation	38.8 mm (1.5 in)	49 of 100 (Notable)
Murray	United States	Record daily precipitation	124.2 mm (4.9 in)	49 of 100 (Notable)
Ibiquera	Brazil	Record daily precipitation	25.2 mm (1.0 in)	48 of 100 (Notable)
Lois River Dam	Canada	Record daily precipitation	56.4 mm (2.2 in)	47 of 100 (Notable)
Tarko-Sale	Russia	Record daily precipitation	62.1 mm (2.4 in)	42 of 100 (Notable)
Newbern	United States	Record daily precipitation	78.7 mm (3.1 in)	41 of 100 (Notable)
Pachena Point	Canada	Record daily precipitation	64.3 mm (2.5 in)	39 of 100 (Notable)
Brooksville Chin Hill	United States	Record low minimum temperature	18.9 C (66.0 F)	39 of 100 (Notable)
Clowhom Falls	Canada	Record daily precipitation	36.6 mm (1.4 in)	38 of 100 (Notable)
Lawton	United States	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Fitzgerald	United States	Record daily precipitation	64.0 mm (2.5 in)	37 of 100 (Notable)
Pensacola Rgnl AP	United States	Record daily precipitation	94.0 mm (3.7 in)	37 of 100 (Notable)
Grand Is Cntrl NE Rgnl AP	United States	Record daily precipitation	39.6 mm (1.6 in)	37 of 100 (Notable)
Wistaria	Canada	Record daily precipitation	37.5 mm (1.5 in)	36 of 100 (Notable)
Chilliwack	Canada	Record low maximum temperature	15.5 C (59.9 F)	36 of 100 (Notable)
Arnsberg	Germany	Record low maximum temperature	15.2 C (59.4 F)	36 of 100 (Notable)
Salem AP (McNary Field)	United States	Record high minimum temperature	17.2 C (63.0 F)	36 of 100 (Notable)
Hopkinsville	United States	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
Watonga	United States	Record daily precipitation	34.0 mm (1.3 in)	35 of 100 (Notable)
Tobermory	Canada	Record low minimum temperature	4.0 C (39.2 F)	33 of 100 (Routine)
Delphi 2 N	United States	Record daily precipitation	55.4 mm (2.2 in)	33 of 100 (Routine)
Biloxi	United States	Record low maximum temperature	28.3 C (82.9 F)	33 of 100 (Routine)
Summit	United States	Record high minimum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Fort McMurray A	Canada	Record daily precipitation	33.1 mm (1.3 in)	32 of 100 (Routine)
Coloso	Puerto Rico [United States]	Record low maximum temperature	28.9 C (84.0 F)	32 of 100 (Routine)
Lemon Cove	United States	Record high minimum temperature	23.3 C (73.9 F)	32 of 100 (Routine)
Brandon Cda	Canada	Record high minimum temperature	21.0 C (69.8 F)	31 of 100 (Routine)
W Pt	United States	Record low maximum temperature	26.7 C (80.1 F)	31 of 100 (Routine)
Round Spring 2SW	United States	Record daily precipitation	89.4 mm (3.5 in)	31 of 100 (Routine)
Estevan Point	Canada	Record daily precipitation	41.8 mm (1.6 in)	30 of 100 (Routine)
Experiment	United States	Record low maximum temperature	25.6 C (78.1 F)	30 of 100 (Routine)
Brookport Dam 52	United States	Record daily precipitation	55.4 mm (2.2 in)	30 of 100 (Routine)
Swan River	Canada	Record high maximum temperature	35.6 C (96.1 F)	29 of 100 (Routine)
Bastia	France	Record low maximum temperature	22.0 C (71.6 F)	29 of 100 (Routine)
Scottsville	United States	Record daily precipitation	73.4 mm (2.9 in)	29 of 100 (Routine)
Chilliwack	Canada	Record daily precipitation	26.8 mm (1.1 in)	28 of 100 (Routine)
Northam	Australia	Record low minimum temperature	-1.0 C (30.2 F)	27 of 100 (Routine)
Alliance	Canada	Record high minimum temperature	21.5 C (70.7 F)	27 of 100 (Routine)
Klintonel	Canada	Record high minimum temperature	13.9 C (57.0 F)	27 of 100 (Routine)
Russell	Canada	Record high maximum temperature	33.5 C (92.3 F)	27 of 100 (Routine)
Roosevelt 1 S	United States	Record low minimum temperature	17.2 C (63.0 F)	27 of 100 (Routine)
Dresden	United States	Record daily precipitation	67.3 mm (2.6 in)	27 of 100 (Routine)
Creston	United States	Record daily precipitation	73.2 mm (2.9 in)	27 of 100 (Routine)
Fairhope 2 NE	United States	Record low maximum temperature	24.4 C (75.9 F)	26 of 100 (Routine)
Fredericktown	United States	Record daily precipitation	70.4 mm (2.8 in)	26 of 100 (Routine)
Hatton 9 SE	United States	Record high minimum temperature	18.9 C (66.0 F)	26 of 100 (Routine)
Yecora (Smn)	Mexico	Record high minimum temperature	16.7 C (62.1 F)	25 of 100 (Routine)
Arcadia	United States	Record daily precipitation	30.5 mm (1.2 in)	25 of 100 (Routine)
Scipio	United States	Record high minimum temperature	18.3 C (64.9 F)	25 of 100 (Routine)
Port Hardy A	Canada	Record daily precipitation	25.2 mm (1.0 in)	24 of 100 (Routine)
Chesterfield	Canada	Record low minimum temperature	-1.0 C (30.2 F)	24 of 100 (Routine)
Minnedosa	Canada	Record high maximum temperature	32.8 C (91.0 F)	24 of 100 (Routine)
Cuatro Cienegas (Smn)	Mexico	Record daily precipitation	59.9 mm (2.4 in)	24 of 100 (Routine)
Elma	United States	Record high minimum temperature	15.0 C (59.0 F)	24 of 100 (Routine)

Counts by Type and Timescale

433 records

Records set or tied on 11 August 1978 by type: Highest daily maximum 49, Lowest daily maximum 88, Highest daily minimum 79, Lowest daily minimum 62, Heaviest daily rainfall 155.

Records on 11 August 1978 by type
Record type	Records
Highest daily maximum	49
Lowest daily maximum	88
Highest daily minimum	79
Lowest daily minimum	62
Heaviest daily rainfall	155
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 August 1978 by timescale: all-time 1, monthly 8, daily 424.

How Much Records Were Beaten By

345 broken records

Margins by which the 345 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 55.9. Ties are not counted.

Top 20 by Significance

11 August 1978

Top 20 records on 11 August 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 August 1978	Casterton (Roseneath), AU	all-time rain	115.0 mm (4.5 in)	16.8 mm (0.7 in)	0 years	64 of 100 (Major)
11 August 1978	Lake Crescent (Serat), AU	daily rain	48.0 mm (1.9 in)	35.3 mm (1.4 in)	52 years	60 of 100 (Major)
11 August 1978	Lencois, BR	daily rain	35.6 mm (1.4 in)	25.2 mm (1.0 in)	47 years	55 of 100 (Notable)
11 August 1978	Piaxtla, MX	monthly rain	159.8 mm (6.3 in)	54.6 mm (2.1 in)	3 years	54 of 100 (Notable)
11 August 1978	Stillwater Power House, CA	daily rain	58.4 mm (2.3 in)	37.8 mm (1.5 in)	20 years	50 of 100 (Notable)
11 August 1978	Sala Rch, US	daily rain	72.4 mm (2.9 in)	51.3 mm (2.0 in)	24 years	50 of 100 (Notable)
11 August 1978	Elliston, AU	daily rain	38.8 mm (1.5 in)	20.0 mm (0.8 in)	3 years	49 of 100 (Notable)
11 August 1978	Murray, US	monthly rain	124.2 mm (4.9 in)	36.6 mm (1.4 in)	36 years	49 of 100 (Notable)
11 August 1978	Ibiquera, BR	daily rain	25.2 mm (1.0 in)	25.2 mm (1.0 in)	36 years	48 of 100 (Notable)
11 August 1978	Lois River Dam, CA	daily rain	56.4 mm (2.2 in)	38.6 mm (1.5 in)	20 years	47 of 100 (Notable)
11 August 1978	Tarko-Sale, RU	monthly rain	62.1 mm (2.4 in)	13.9 mm (0.5 in)	21 years	42 of 100 (Notable)
11 August 1978	Newbern, US	daily rain	78.7 mm (3.1 in)	44.9 mm (1.8 in)	36 years	41 of 100 (Notable)
11 August 1978	Pachena Point, CA	daily rain	64.3 mm (2.5 in)	39.7 mm (1.6 in)	8 years	39 of 100 (Notable)
11 August 1978	Brooksville Chin Hill, US	daily low min	18.9 C (66.0 F)	1.7 C (3.1 F)	59 years	39 of 100 (Notable)
11 August 1978	Clowhom Falls, CA	daily rain	36.6 mm (1.4 in)	20.1 mm (0.8 in)	28 years	38 of 100 (Notable)
11 August 1978	Lawton, US	daily rain	40.6 mm (1.6 in)	29.2 mm (1.1 in)	45 years	38 of 100 (Notable)
11 August 1978	Fitzgerald, US	daily rain	64.0 mm (2.5 in)	25.9 mm (1.0 in)	47 years	37 of 100 (Notable)
11 August 1978	Pensacola Rgnl AP, US	daily rain	94.0 mm (3.7 in)	55.9 mm (2.2 in)	12 years	37 of 100 (Notable)
11 August 1978	Grand Is Cntrl NE Rgnl AP, US	daily rain	39.6 mm (1.6 in)	26.1 mm (1.0 in)	36 years	37 of 100 (Notable)
11 August 1978	Wistaria, CA	monthly rain	37.5 mm (1.5 in)	5.7 mm (0.22 in)	27 years	36 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 433 records.

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

Records on 08-11 in each year
Year	Records
1793	1
1796	1
1811	1
1815	2
1838	1
1839	1
1841	1
1851	1
1855	1
1858	1
1861	2
1862	1
1863	1
1864	6
1865	1
1866	6
1869	4
1871	1
1875	1
1879	2
1881	1
1883	1
1885	1
1888	1
1889	4
1890	4
1891	1
1892	4
1893	1
1894	1
1895	2
1896	5
1897	3
1898	2
1899	3
1900	4
1901	4
1902	13
1903	12
1904	19
1905	9
1906	6
1907	8
1908	10
1909	41
1910	9
1911	24
1912	46
1913	43
1914	26
1915	27
1916	64
1917	217
1918	29
1919	18
1920	54
1921	201
1922	98
1923	80
1924	149
1925	219
1926	140
1927	190
1928	174
1929	354
1930	471
1931	453
1932	281
1933	416
1934	620
1935	499
1936	541
1937	356
1938	315
1939	389
1940	359
1941	807
1942	390
1943	345
1944	936
1945	401
1946	419
1947	709
1948	306
1949	471
1950	320
1951	296
1952	417
1953	283
1954	536
1955	319
1956	457
1957	305
1958	494
1959	337
1960	461
1961	429
1962	662
1963	493
1964	677
1965	793
1966	1,037
1967	1,071
1968	619
1969	533
1970	526
1971	711
1972	823
1973	451
1974	596
1975	753
1976	529
1977	845
1978	433
1979	797
1980	929
1981	645
1982	1,232
1983	1,095
1984	822
1985	804
1986	563
1987	885
1988	1,119
1989	983
1990	760
1991	822
1992	928
1993	840
1994	1,173
1995	1,324
1996	1,147
1997	1,512
1998	1,232
1999	1,152
2000	924
2001	811
2002	1,152
2003	1,601
2004	1,478
2005	1,031
2006	896
2007	1,428
2008	945
2009	836
2010	2,289
2011	1,106
2012	953
2013	470
2014	556
2015	696
2016	1,340
2017	619
2018	861
2019	758
2020	688
2021	834
2022	661
2023	757
2024	643
2025	722
2026	765

Download the Data

Data for records on 1978-08-11: 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 10	300
10 to 20	25
20 to 30	8
30 to 40	8
40 to 50	1
50 to 60	3