Weather Records on 11 August 1981

645 weather records were set or tied worldwide on 11 August 1981. Highest significance: Conchas Dam, US.

Key Facts for 11 August 1981

On 11 August 1981, 645 weather records were set or tied at long-record stations worldwide.
278 were record highs and 214 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 19 monthly and 623 daily.
Conchas Dam set a daily record precipitation of 71.1 mm (2.8 in) on 11 August 1981.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

645 stations

645 station records on 11 August 1981 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 August 1981: highest significance records shown on the map
Station	Country	Type	Value	Significance
Conchas Dam	United States	Record daily precipitation	71.1 mm (2.8 in)	55 of 100 (Notable)
Magnitogorsk	Russia	Record daily precipitation	40.0 mm (1.6 in)	54 of 100 (Notable)
Trinidad	United States	Record daily precipitation	106.7 mm (4.2 in)	53 of 100 (Notable)
Portales	United States	Record daily precipitation	74.9 mm (2.9 in)	53 of 100 (Notable)
Rajkot	India	Record daily precipitation	119.9 mm (4.7 in)	52 of 100 (Notable)
Melrose	United States	Record daily precipitation	104.1 mm (4.1 in)	50 of 100 (Notable)
Scofield Dam	United States	Record daily precipitation	27.9 mm (1.1 in)	47 of 100 (Notable)
Elberta	United States	Record low maximum temperature	18.9 C (66.0 F)	45 of 100 (Notable)
Ponta da Praia	Brazil	Record daily precipitation	54.7 mm (2.2 in)	44 of 100 (Notable)
Spanish Fk Pwr House	United States	Record low maximum temperature	18.9 C (66.0 F)	44 of 100 (Notable)
Anadarko 3 E	United States	Record low maximum temperature	25.6 C (78.1 F)	43 of 100 (Notable)
Chilliwack	Canada	Record high minimum temperature	19.5 C (67.1 F)	42 of 100 (Notable)
Santa Cruz	United States	Record low minimum temperature	3.3 C (37.9 F)	42 of 100 (Notable)
Pasamonte	United States	Record daily precipitation	56.4 mm (2.2 in)	41 of 100 (Notable)
San Jon	United States	Record daily precipitation	49.5 mm (1.9 in)	41 of 100 (Notable)
Tepelmeme de Morelos	Mexico	Record high maximum temperature	35.0 C (95.0 F)	40 of 100 (Notable)
Port Townsend	United States	Record high minimum temperature	15.0 C (59.0 F)	40 of 100 (Notable)
Tastyp	Russia	Record daily precipitation	55.1 mm (2.2 in)	39 of 100 (Notable)
Springer	United States	Record daily precipitation	48.3 mm (1.9 in)	39 of 100 (Notable)
Mt Locke	United States	Record daily precipitation	68.6 mm (2.7 in)	39 of 100 (Notable)
Tascosa	United States	Record daily precipitation	39.4 mm (1.6 in)	38 of 100 (Notable)
Cimarron 4 SW	United States	Record daily precipitation	29.7 mm (1.2 in)	37 of 100 (Notable)
Tropic	United States	Record low maximum temperature	17.2 C (63.0 F)	37 of 100 (Notable)
Anacortes	United States	Record high minimum temperature	17.2 C (63.0 F)	37 of 100 (Notable)
Everett	United States	Record high minimum temperature	20.6 C (69.1 F)	37 of 100 (Notable)
Barkerville	Canada	Record high maximum temperature	30.0 C (86.0 F)	36 of 100 (Notable)
Oswego	United States	Record daily precipitation	37.6 mm (1.5 in)	36 of 100 (Notable)
Mould Bay A	Canada	Record daily snowfall	8.0 cm (3.1 in)	35 of 100 (Notable)
Ft Valley	United States	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
Lumpkin 2 SE	United States	Record high maximum temperature	36.7 C (98.1 F)	35 of 100 (Notable)
Erick	United States	Record low maximum temperature	23.3 C (73.9 F)	35 of 100 (Notable)
Kingfisher	United States	Record low maximum temperature	26.7 C (80.1 F)	35 of 100 (Notable)
Saint Helena	United States	Record high minimum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Paragonah	United States	Record low maximum temperature	19.4 C (66.9 F)	34 of 100 (Routine)
Seattle UNIV of Washin	United States	Record high minimum temperature	20.6 C (69.1 F)	34 of 100 (Routine)
Bellingham Intl AP	United States	Record high minimum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Richfield	United States	Record low maximum temperature	24.4 C (75.9 F)	33 of 100 (Routine)
Heber	United States	Record low maximum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Pleasant Grove	United States	Record low maximum temperature	21.1 C (70.0 F)	33 of 100 (Routine)
Richfield Radio Ksvc	United States	Record low maximum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Aberdeen	United States	Record high maximum temperature	38.3 C (100.9 F)	33 of 100 (Routine)
Kjahta	Russia	Record low minimum temperature	3.3 C (37.9 F)	32 of 100 (Routine)
Delta	United States	Record low maximum temperature	22.2 C (72.0 F)	32 of 100 (Routine)
Merrill	United States	Record daily precipitation	45.2 mm (1.8 in)	32 of 100 (Routine)
Lorenzo	United States	Record daily precipitation	56.4 mm (2.2 in)	32 of 100 (Routine)
Cottonwood Weir	United States	Record low maximum temperature	23.9 C (75.0 F)	32 of 100 (Routine)
Ellensburg	United States	Record high maximum temperature	38.3 C (100.9 F)	32 of 100 (Routine)
Kaiserslautern	Germany	Record low maximum temperature	16.0 C (60.8 F)	31 of 100 (Routine)
Black Rock	United States	Record low maximum temperature	26.1 C (79.0 F)	31 of 100 (Routine)
Santaquin Chlorinator	United States	Record daily precipitation	29.7 mm (1.2 in)	31 of 100 (Routine)
Timpanogos Cave	United States	Record low maximum temperature	20.0 C (68.0 F)	31 of 100 (Routine)
Port Angeles	United States	Record high minimum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Eagle FAA AP	United States	Record low maximum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
La Junta Muni AP	United States	Record daily precipitation	31.0 mm (1.2 in)	31 of 100 (Routine)
Buena Vista 2S	United States	Record low maximum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Glenwood Spgs #2	United States	Record low maximum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Maxwell 3 NW	United States	Record daily precipitation	27.7 mm (1.1 in)	30 of 100 (Routine)
Mosquero 1 NE	United States	Record daily precipitation	75.9 mm (3.0 in)	30 of 100 (Routine)
Lawton	United States	Record low maximum temperature	27.2 C (81.0 F)	30 of 100 (Routine)
Beaver	United States	Record low maximum temperature	20.6 C (69.1 F)	30 of 100 (Routine)

Counts by Type and Timescale

645 records

Records set or tied on 11 August 1981 by type: Highest daily maximum 161, Lowest daily maximum 168, Highest daily minimum 117, Lowest daily minimum 46, Heaviest daily rainfall 152, Heaviest daily snowfall 1.

Records on 11 August 1981 by type
Record type	Records
Highest daily maximum	161
Lowest daily maximum	168
Highest daily minimum	117
Lowest daily minimum	46
Heaviest daily rainfall	152
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 11 August 1981 by timescale: all-time 3, monthly 19, daily 623.

How Much Records Were Beaten By

498 broken records

Margins by which the 498 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 91.7. Ties are not counted.

Top 20 by Significance

11 August 1981

Top 20 records on 11 August 1981 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 August 1981	Conchas Dam, US	daily rain	71.1 mm (2.8 in)	57.9 mm (2.3 in)	39 years	55 of 100 (Notable)
11 August 1981	Magnitogorsk, RU	daily rain	40.0 mm (1.6 in)	32.7 mm (1.3 in)	34 years	54 of 100 (Notable)
11 August 1981	Trinidad, US	all-time rain	106.7 mm (4.2 in)	12.0 mm (0.5 in)	38 years	53 of 100 (Notable)
11 August 1981	Portales, US	daily rain	74.9 mm (2.9 in)	56.6 mm (2.2 in)	20 years	53 of 100 (Notable)
11 August 1981	Rajkot, IN	daily rain	119.9 mm (4.7 in)	91.7 mm (3.6 in)	16 years	52 of 100 (Notable)
11 August 1981	Melrose, US	daily rain	104.1 mm (4.1 in)	67.3 mm (2.6 in)	11 years	50 of 100 (Notable)
11 August 1981	Scofield Dam, US	daily rain	27.9 mm (1.1 in)	22.3 mm (0.9 in)	16 years	47 of 100 (Notable)
11 August 1981	Elberta, US	daily low max	18.9 C (66.0 F)	6.7 C (12.1 F)	56 years	45 of 100 (Notable)
11 August 1981	Ponta da Praia, BR	daily rain	54.7 mm (2.2 in)	34.9 mm (1.4 in)	32 years	44 of 100 (Notable)
11 August 1981	Spanish Fk Pwr House, US	daily low max	18.9 C (66.0 F)	6.7 C (12.1 F)	56 years	44 of 100 (Notable)
11 August 1981	Anadarko 3 E, US	daily low max	25.6 C (78.1 F)	3.3 C (5.9 F)	87 years	43 of 100 (Notable)
11 August 1981	Chilliwack, CA	daily high min	19.5 C (67.1 F)	2.3 C (4.1 F)	82 years	42 of 100 (Notable)
11 August 1981	Santa Cruz, US	monthly low min	3.3 C (37.9 F)	0.6 C (1.1 F)	75 years	42 of 100 (Notable)
11 August 1981	Pasamonte, US	daily rain	56.4 mm (2.2 in)	17.8 mm (0.7 in)	60 years	41 of 100 (Notable)
11 August 1981	San Jon, US	daily rain	49.5 mm (1.9 in)	33.2 mm (1.3 in)	30 years	41 of 100 (Notable)
11 August 1981	Tepelmeme de Morelos, MX	monthly high max	35.0 C (95.0 F)	5.6 C (10.1 F)	22 years	40 of 100 (Notable)
11 August 1981	Port Townsend, US	daily high min	15.0 C (59.0 F)	1.1 C (2.0 F)	83 years	40 of 100 (Notable)
11 August 1981	Tastyp, RU	monthly rain	55.1 mm (2.2 in)	8.3 mm (0.33 in)	36 years	39 of 100 (Notable)
11 August 1981	Springer, US	daily rain	48.3 mm (1.9 in)	26.7 mm (1.1 in)	12 years	39 of 100 (Notable)
11 August 1981	Mt Locke, US	daily rain	68.6 mm (2.7 in)	32.3 mm (1.3 in)	15 years	39 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 1981

Records set or tied on this calendar date in each year from 1793 to 1981. 1981 had 645 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 1981-08-11: 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 20	481
20 to 40	10
40 to 60	5
60 to 80	1
80 to 100	1