Weather Records on 4 August 1981

636 weather records were set or tied worldwide on 4 August 1981. Highest significance: Richmond, CA.

Key Facts for 4 August 1981

On 4 August 1981, 636 weather records were set or tied at long-record stations worldwide.
185 were record highs and 105 were record lows, counting maximum and minimum temperature.
By timescale, 9 were all-time records, 23 monthly and 604 daily.
Richmond set a daily record precipitation of 47.5 mm (1.9 in) on 4 August 1981.
Across 165 earlier years (1815 to 2026) the same calendar date averaged 440 records.

Record Map

636 stations

636 station records on 4 August 1981 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 August 1981: highest significance records shown on the map
Station	Country	Type	Value	Significance
Richmond	Canada	Record daily precipitation	47.5 mm (1.9 in)	64 of 100 (Major)
Iwamizawa	Japan	Record daily precipitation	262.0 mm (10.3 in)	64 of 100 (Major)
Natimuk	Australia	Record daily precipitation	28.0 mm (1.1 in)	61 of 100 (Major)
Lake Lonsdale	Australia	Record daily precipitation	50.6 mm (2.0 in)	58 of 100 (Notable)
Pocahontas	United States	Record daily precipitation	101.6 mm (4.0 in)	58 of 100 (Notable)
Natte Yallock	Australia	Record daily precipitation	43.2 mm (1.7 in)	57 of 100 (Notable)
Maryborough	Australia	Record daily precipitation	40.4 mm (1.6 in)	55 of 100 (Notable)
Gore Bay	Canada	Record daily precipitation	51.0 mm (2.0 in)	55 of 100 (Notable)
Bellellen	Australia	Record daily precipitation	36.4 mm (1.4 in)	53 of 100 (Notable)
St Come	Canada	Record daily precipitation	81.0 mm (3.2 in)	53 of 100 (Notable)
Murtoa	Australia	Record daily precipitation	25.6 mm (1.0 in)	51 of 100 (Notable)
St Gabriel de Brandon	Canada	Record daily precipitation	55.0 mm (2.2 in)	51 of 100 (Notable)
Mallersdorf/Niederbayern	Germany	Record daily precipitation	43.6 mm (1.7 in)	51 of 100 (Notable)
Tomakomai	Japan	Record daily precipitation	176.0 mm (6.9 in)	51 of 100 (Notable)
Avoca (Post Office)	Australia	Record daily precipitation	39.0 mm (1.5 in)	50 of 100 (Notable)
Seymour Shire Depot	Australia	Record daily precipitation	31.0 mm (1.2 in)	50 of 100 (Notable)
Hawi 168	United States	Record daily precipitation	48.5 mm (1.9 in)	50 of 100 (Notable)
Palolo Vly 718	United States	Record daily precipitation	130.6 mm (5.1 in)	50 of 100 (Notable)
Wilhelmina Rise 721	United States	Record daily precipitation	58.9 mm (2.3 in)	50 of 100 (Notable)
Pauoa Flats 784	United States	Record daily precipitation	159.5 mm (6.3 in)	49 of 100 (Notable)
Glenorchy	Australia	Record daily precipitation	41.6 mm (1.6 in)	48 of 100 (Notable)
Fort William	Australia	Record daily precipitation	32.2 mm (1.3 in)	48 of 100 (Notable)
Hawaii Vol Np HQ 54	United States	Record daily precipitation	84.6 mm (3.3 in)	48 of 100 (Notable)
Jung	Australia	Record daily precipitation	27.8 mm (1.1 in)	47 of 100 (Notable)
Drung Drung	Australia	Record daily precipitation	30.2 mm (1.2 in)	47 of 100 (Notable)
Horsham Polkemmet Rd	Australia	Record daily precipitation	26.4 mm (1.0 in)	47 of 100 (Notable)
Farnham	Canada	Record daily precipitation	42.8 mm (1.7 in)	47 of 100 (Notable)
Asahikawa	Japan	Record daily precipitation	167.0 mm (6.6 in)	47 of 100 (Notable)
Rushville	United States	Record daily precipitation	79.2 mm (3.1 in)	47 of 100 (Notable)
Valentine Miller Fld AP	United States	Record daily precipitation	58.9 mm (2.3 in)	47 of 100 (Notable)
Petawawa Nat Forestry	Canada	Record daily precipitation	62.8 mm (2.5 in)	46 of 100 (Notable)
Towong Upper	Australia	Record daily precipitation	41.4 mm (1.6 in)	45 of 100 (Notable)
Plant City	United States	Record high minimum temperature	26.1 C (79.0 F)	45 of 100 (Notable)
Kon-Kolodez	Russia	Record daily precipitation	26.9 mm (1.1 in)	44 of 100 (Notable)
Micurinsk	Russia	Record daily precipitation	25.1 mm (1.0 in)	44 of 100 (Notable)
Ainsworth	United States	Record daily precipitation	86.4 mm (3.4 in)	44 of 100 (Notable)
Redbank	Australia	Record daily precipitation	53.0 mm (2.1 in)	42 of 100 (Notable)
Cairn Curran Reservoir	Australia	Record daily precipitation	33.6 mm (1.3 in)	42 of 100 (Notable)
Newstead	Australia	Record daily precipitation	31.2 mm (1.2 in)	42 of 100 (Notable)
Moonambel	Australia	Record daily precipitation	45.2 mm (1.8 in)	41 of 100 (Notable)
Navarre	Australia	Record daily precipitation	42.0 mm (1.7 in)	41 of 100 (Notable)
Sapporo	Japan	Record daily precipitation	170.0 mm (6.7 in)	41 of 100 (Notable)
Ica	Russia	Record daily precipitation	48.3 mm (1.9 in)	41 of 100 (Notable)
Walgett Council Depot	Australia	Record high minimum temperature	12.7 C (54.9 F)	40 of 100 (Notable)
Madawaska	Canada	Record daily precipitation	50.0 mm (2.0 in)	40 of 100 (Notable)
Otter Lake	Canada	Record daily precipitation	69.4 mm (2.7 in)	40 of 100 (Notable)
Geraldine	United States	Record daily precipitation	33.8 mm (1.3 in)	40 of 100 (Notable)
Goroke (Post Office)	Australia	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)
Morrl Morrl (Valley View)	Australia	Record daily precipitation	30.0 mm (1.2 in)	39 of 100 (Notable)
Carisbrook	Australia	Record daily precipitation	35.6 mm (1.4 in)	39 of 100 (Notable)
Kilauea 1134	United States	Record daily precipitation	27.9 mm (1.1 in)	39 of 100 (Notable)
Kohala Mis 175.1	United States	Record daily precipitation	61.7 mm (2.4 in)	39 of 100 (Notable)
Houghton (Glen Ewin)	Australia	Record daily precipitation	50.2 mm (2.0 in)	38 of 100 (Notable)
Bonnie Doon Garage	Australia	Record daily precipitation	25.8 mm (1.0 in)	38 of 100 (Notable)
Merriman	United States	Record daily precipitation	44.5 mm (1.8 in)	38 of 100 (Notable)
Brisbane Regional Office	Australia	Record high maximum temperature	28.0 C (82.4 F)	37 of 100 (Notable)
Minyip (Post Office)	Australia	Record daily precipitation	28.0 mm (1.1 in)	37 of 100 (Notable)
Tallangatta Dcnr	Australia	Record daily precipitation	26.8 mm (1.1 in)	37 of 100 (Notable)
Whitewood	Canada	Record daily precipitation	39.8 mm (1.6 in)	37 of 100 (Notable)
Ft Morgan	United States	Record high minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)

Counts by Type and Timescale

636 records

Records set or tied on 4 August 1981 by type: Highest daily maximum 71, Lowest daily maximum 39, Highest daily minimum 114, Lowest daily minimum 66, Heaviest daily rainfall 346.

Records on 4 August 1981 by type
Record type	Records
Highest daily maximum	71
Lowest daily maximum	39
Highest daily minimum	114
Lowest daily minimum	66
Heaviest daily rainfall	346
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 4 August 1981 by timescale: all-time 9, monthly 23, daily 604.

How Much Records Were Beaten By

530 broken records

Margins by which the 530 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 135.4. Ties are not counted.

Top 20 by Significance

4 August 1981

Top 20 records on 4 August 1981 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 August 1981	Richmond, CA	daily rain	47.5 mm (1.9 in)	27.7 mm (1.1 in)	92 years	64 of 100 (Major)
4 August 1981	Iwamizawa, JP	all-time rain	262.0 mm (10.3 in)	82.5 mm (3.2 in)	5 years	64 of 100 (Major)
4 August 1981	Natimuk, AU	daily rain	28.0 mm (1.1 in)	15.8 mm (0.6 in)	55 years	61 of 100 (Major)
4 August 1981	Lake Lonsdale, AU	monthly rain	50.6 mm (2.0 in)	12.5 mm (0.5 in)	64 years	58 of 100 (Notable)
4 August 1981	Pocahontas, US	daily rain	101.6 mm (4.0 in)	66.0 mm (2.6 in)	36 years	58 of 100 (Notable)
4 August 1981	Natte Yallock, AU	daily rain	43.2 mm (1.7 in)	25.2 mm (1.0 in)	31 years	57 of 100 (Notable)
4 August 1981	Maryborough, AU	daily rain	40.4 mm (1.6 in)	19.6 mm (0.8 in)	31 years	55 of 100 (Notable)
4 August 1981	Gore Bay, CA	daily rain	51.0 mm (2.0 in)	35.0 mm (1.4 in)	28 years	55 of 100 (Notable)
4 August 1981	Bellellen, AU	daily rain	36.4 mm (1.4 in)	18.4 mm (0.7 in)	60 years	53 of 100 (Notable)
4 August 1981	St Come, CA	monthly rain	81.0 mm (3.2 in)	32.2 mm (1.3 in)	22 years	53 of 100 (Notable)
4 August 1981	Murtoa, AU	daily rain	25.6 mm (1.0 in)	7.1 mm (0.28 in)	86 years	51 of 100 (Notable)
4 August 1981	St Gabriel de Brandon, CA	daily rain	55.0 mm (2.2 in)	30.4 mm (1.2 in)	56 years	51 of 100 (Notable)
4 August 1981	Mallersdorf/Niederbayern, DE	daily rain	43.6 mm (1.7 in)	26.9 mm (1.1 in)	27 years	51 of 100 (Notable)
4 August 1981	Tomakomai, JP	all-time rain	176.0 mm (6.9 in)	40.7 mm (1.6 in)	23 years	51 of 100 (Notable)
4 August 1981	Avoca (Post Office), AU	daily rain	39.0 mm (1.5 in)	20.2 mm (0.8 in)	28 years	50 of 100 (Notable)
4 August 1981	Seymour Shire Depot, AU	daily rain	31.0 mm (1.2 in)	7.4 mm (0.29 in)	98 years	50 of 100 (Notable)
4 August 1981	Hawi 168, US	daily rain	48.5 mm (1.9 in)	23.1 mm (0.9 in)	56 years	50 of 100 (Notable)
4 August 1981	Palolo Vly 718, US	daily rain	130.6 mm (5.1 in)	91.5 mm (3.6 in)	23 years	50 of 100 (Notable)
4 August 1981	Wilhelmina Rise 721, US	daily rain	58.9 mm (2.3 in)	38.6 mm (1.5 in)	26 years	50 of 100 (Notable)
4 August 1981	Pauoa Flats 784, US	daily rain	159.5 mm (6.3 in)	100.6 mm (4.0 in)	20 years	49 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

1815 to 1981

Records set or tied on this calendar date in each year from 1815 to 1981. 1981 had 636 records.

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

Records on 08-04 in each year
Year	Records
1815	1
1827	1
1830	2
1833	1
1835	1
1843	1
1846	1
1847	1
1848	1
1857	1
1859	2
1860	2
1863	1
1865	3
1867	1
1868	1
1870	1
1871	1
1872	2
1874	3
1875	1
1878	3
1879	1
1881	2
1882	1
1883	1
1885	3
1886	1
1887	3
1888	4
1889	2
1890	1
1891	2
1893	2
1894	1
1895	3
1896	4
1897	3
1898	1
1899	7
1900	6
1902	4
1903	18
1904	11
1905	19
1906	14
1907	20
1908	31
1909	27
1910	17
1911	23
1912	51
1913	15
1914	33
1915	85
1916	97
1917	29
1918	95
1919	34
1920	79
1921	67
1922	68
1923	146
1924	132
1925	77
1926	334
1927	136
1928	352
1929	224
1930	698
1931	371
1932	258
1933	347
1934	521
1935	367
1936	719
1937	258
1938	489
1939	433
1940	236
1941	383
1942	303
1943	468
1944	662
1945	355
1946	265
1947	845
1948	558
1949	421
1950	666
1951	680
1952	465
1953	1,017
1954	426
1955	624
1956	437
1957	343
1958	533
1959	303
1960	331
1961	745
1962	470
1963	438
1964	885
1965	409
1966	552
1967	428
1968	280
1969	638
1970	415
1971	813
1972	773
1973	748
1974	1,040
1975	772
1976	801
1977	599
1978	1,051
1979	510
1980	998
1981	636
1982	703
1983	920
1984	722
1985	634
1986	905
1987	892
1988	1,204
1989	738
1990	1,013
1991	769
1992	754
1993	1,046
1994	1,265
1995	1,117
1996	1,143
1997	891
1998	1,423
1999	762
2000	840
2001	1,087
2002	928
2003	1,309
2004	968
2005	1,246
2006	1,131
2007	685
2008	883
2009	681
2010	1,665
2011	1,536
2012	738
2013	452
2014	980
2015	505
2016	732
2017	1,134
2018	760
2019	499
2020	778
2021	691
2022	1,185
2023	1,150
2024	809
2025	840
2026	1,044

Download the Data

Data for records on 1981-08-04: 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	480
20 to 40	32
40 to 60	10
60 to 80	3
80 to 100	3
100 to 120	1
120 to 140	1