Weather Records on 18 August 1981

1,386 weather records were set or tied worldwide on 18 August 1981. Highest significance: Ft Pierce, US.

Key Facts for 18 August 1981

On 18 August 1981, 1,386 weather records were set or tied at long-record stations worldwide.
214 were record highs and 769 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 36 monthly and 1,350 daily.
Ft Pierce set a daily record precipitation of 108.7 mm (4.3 in) on 18 August 1981.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 435 records.

Record Map

1,386 stations

1,386 station records on 18 August 1981 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 1981: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ft Pierce	United States	Record daily precipitation	108.7 mm (4.3 in)	59 of 100 (Notable)
Caete	Brazil	Record daily precipitation	44.2 mm (1.7 in)	56 of 100 (Notable)
Melrose	Australia	Record daily precipitation	32.0 mm (1.3 in)	54 of 100 (Notable)
Loxahatchee	United States	Record daily precipitation	94.5 mm (3.7 in)	54 of 100 (Notable)
Sao Pedro Do Suacui	Brazil	Record daily precipitation	28.5 mm (1.1 in)	53 of 100 (Notable)
Royal Palm Rs	United States	Record daily precipitation	196.9 mm (7.8 in)	53 of 100 (Notable)
Miami Beach	United States	Record daily precipitation	89.2 mm (3.5 in)	52 of 100 (Notable)
Komsomolsk-Na-Amure	Russia	Record daily precipitation	62.1 mm (2.4 in)	50 of 100 (Notable)
Lysebotn	Norway	Record daily precipitation	46.8 mm (1.8 in)	49 of 100 (Notable)
White Sulphur Spg 10 N	United States	Record daily precipitation	44.5 mm (1.8 in)	49 of 100 (Notable)
W Palm Beach Intl AP	United States	Record daily precipitation	94.7 mm (3.7 in)	49 of 100 (Notable)
Caixa de Areia	Brazil	Record daily precipitation	25.6 mm (1.0 in)	48 of 100 (Notable)
Newport	United States	Record low maximum temperature	21.1 C (70.0 F)	46 of 100 (Notable)
Tamiami Trail 40 Mi Bend	United States	Record daily precipitation	129.5 mm (5.1 in)	46 of 100 (Notable)
Cartersville	United States	Record low maximum temperature	24.4 C (75.9 F)	44 of 100 (Notable)
Ft Kent	United States	Record daily precipitation	50.8 mm (2.0 in)	44 of 100 (Notable)
Henderson 2 NNW	United States	Record low minimum temperature	5.0 C (41.0 F)	44 of 100 (Notable)
Ruhnu	Latvia	Record daily precipitation	31.6 mm (1.2 in)	43 of 100 (Notable)
Puente San Isidro	Mexico	Record daily precipitation	39.9 mm (1.6 in)	43 of 100 (Notable)
Little Mtn	United States	Record low maximum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Newberry	United States	Record low maximum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Coldwater	United States	Record daily precipitation	38.1 mm (1.5 in)	43 of 100 (Notable)
Mineracao Morro Velho	Brazil	Record daily precipitation	27.8 mm (1.1 in)	42 of 100 (Notable)
Samaria	Mexico	Record daily precipitation	77.5 mm (3.1 in)	42 of 100 (Notable)
Im. Poliny Osipenko	Russia	Record daily precipitation	38.9 mm (1.5 in)	41 of 100 (Notable)
Corinth 5 WSW	United States	Record low maximum temperature	25.6 C (78.1 F)	41 of 100 (Notable)
Abadia Dos Dourados	Brazil	Record daily precipitation	37.1 mm (1.5 in)	40 of 100 (Notable)
Santa Maria de Itabira	Brazil	Record daily precipitation	39.0 mm (1.5 in)	40 of 100 (Notable)
Salitre	Brazil	Record daily precipitation	29.0 mm (1.1 in)	40 of 100 (Notable)
Jackson Exp STN	United States	Record low maximum temperature	22.8 C (73.0 F)	40 of 100 (Notable)
Milan Exp STN	United States	Record low maximum temperature	23.3 C (73.9 F)	40 of 100 (Notable)
Lampasas	United States	Record daily precipitation	69.1 mm (2.7 in)	40 of 100 (Notable)
Resolute Cars	Canada	Record daily snowfall	10.4 cm (4.1 in)	39 of 100 (Notable)
Bologna	Italy	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Malvern	United States	Record low maximum temperature	26.7 C (80.1 F)	39 of 100 (Notable)
Pine Bluff	United States	Record low maximum temperature	23.9 C (75.0 F)	39 of 100 (Notable)
Greenfield	United States	Record low minimum temperature	6.1 C (43.0 F)	39 of 100 (Notable)
Union City	United States	Record low maximum temperature	23.9 C (75.0 F)	39 of 100 (Notable)
Haskell	United States	Record daily precipitation	49.5 mm (1.9 in)	39 of 100 (Notable)
Coolatai (Orana)	Australia	Record daily precipitation	41.6 mm (1.6 in)	38 of 100 (Notable)
Usina Parauna	Brazil	Record daily precipitation	35.2 mm (1.4 in)	38 of 100 (Notable)
Desterro Do Melo	Brazil	Record daily precipitation	28.0 mm (1.1 in)	38 of 100 (Notable)
Windsor	United States	Record low minimum temperature	11.7 C (53.1 F)	38 of 100 (Notable)
Martinsburg E W Virginia Rgnl	United States	Record low minimum temperature	6.1 C (43.0 F)	38 of 100 (Notable)
Melrose (Para Gums)	Australia	Record daily precipitation	26.8 mm (1.1 in)	37 of 100 (Notable)
Delicias (Dge)	Mexico	Record daily precipitation	37.8 mm (1.5 in)	37 of 100 (Notable)
Defiance	United States	Record low minimum temperature	6.1 C (43.0 F)	37 of 100 (Notable)
State College	United States	Record low minimum temperature	6.1 C (43.0 F)	37 of 100 (Notable)
Laurens	United States	Record low maximum temperature	23.3 C (73.9 F)	37 of 100 (Notable)
Helena	United States	Record low maximum temperature	25.6 C (78.1 F)	36 of 100 (Notable)
Ft Lauderdale	United States	Record low maximum temperature	26.7 C (80.1 F)	36 of 100 (Notable)
Bellefontaine	United States	Record low minimum temperature	7.8 C (46.0 F)	36 of 100 (Notable)
Norwalk Wwtp	United States	Record low minimum temperature	5.6 C (42.1 F)	36 of 100 (Notable)
Coatesville 1 SW	United States	Record low minimum temperature	7.2 C (45.0 F)	36 of 100 (Notable)
Moctezuma (Smn)	Mexico	Record daily precipitation	39.9 mm (1.6 in)	35 of 100 (Notable)
Tres Brazos	Mexico	Record daily precipitation	80.3 mm (3.2 in)	35 of 100 (Notable)
Brohovo	Russia	Record low minimum temperature	1.3 C (34.3 F)	35 of 100 (Notable)
Hot Springs 1 NNE	United States	Record low maximum temperature	23.3 C (73.9 F)	35 of 100 (Notable)
Jonesboro 3 SSE	United States	Record low maximum temperature	21.1 C (70.0 F)	35 of 100 (Notable)
Guthrie Ctr	United States	Record low minimum temperature	6.7 C (44.1 F)	35 of 100 (Notable)

Counts by Type and Timescale

1,386 records

Records set or tied on 18 August 1981 by type: Highest daily maximum 93, Lowest daily maximum 336, Highest daily minimum 121, Lowest daily minimum 433, Heaviest daily rainfall 402, Heaviest daily snowfall 1.

Records on 18 August 1981 by type
Record type	Records
Highest daily maximum	93
Lowest daily maximum	336
Highest daily minimum	121
Lowest daily minimum	433
Heaviest daily rainfall	402
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 18 August 1981 by timescale: all-time 0, monthly 36, daily 1,350.

How Much Records Were Beaten By

1,092 broken records

Margins by which the 1,092 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.2. Ties are not counted.

Top 20 by Significance

18 August 1981

Top 20 records on 18 August 1981 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1981	Ft Pierce, US	daily rain	108.7 mm (4.3 in)	53.8 mm (2.1 in)	59 years	59 of 100 (Notable)
18 August 1981	Caete, BR	daily rain	44.2 mm (1.7 in)	44.2 mm (1.7 in)	40 years	56 of 100 (Notable)
18 August 1981	Melrose, AU	daily rain	32.0 mm (1.3 in)	12.9 mm (0.5 in)	94 years	54 of 100 (Notable)
18 August 1981	Loxahatchee, US	daily rain	94.5 mm (3.7 in)	70.9 mm (2.8 in)	36 years	54 of 100 (Notable)
18 August 1981	Sao Pedro Do Suacui, BR	daily rain	28.5 mm (1.1 in)	28.4 mm (1.1 in)	30 years	53 of 100 (Notable)
18 August 1981	Royal Palm Rs, US	monthly rain	196.9 mm (7.8 in)	76.2 mm (3.0 in)	0 years	53 of 100 (Notable)
18 August 1981	Miami Beach, US	daily rain	89.2 mm (3.5 in)	65.8 mm (2.6 in)	26 years	52 of 100 (Notable)
18 August 1981	Komsomolsk-Na-Amure, RU	daily rain	62.1 mm (2.4 in)	51.9 mm (2.0 in)	22 years	50 of 100 (Notable)
18 August 1981	Lysebotn, NO	daily rain	46.8 mm (1.8 in)	18.4 mm (0.7 in)	80 years	49 of 100 (Notable)
18 August 1981	White Sulphur Spg 10 N, US	daily rain	44.5 mm (1.8 in)	39.9 mm (1.6 in)	23 years	49 of 100 (Notable)
18 August 1981	W Palm Beach Intl AP, US	daily rain	94.7 mm (3.7 in)	53.0 mm (2.1 in)	36 years	49 of 100 (Notable)
18 August 1981	Caixa de Areia, BR	daily rain	25.6 mm (1.0 in)	25.6 mm (1.0 in)	40 years	48 of 100 (Notable)
18 August 1981	Newport, US	daily low max	21.1 C (70.0 F)	4.5 C (8.1 F)	84 years	46 of 100 (Notable)
18 August 1981	Tamiami Trail 40 Mi Bend, US	monthly rain	129.5 mm (5.1 in)	35.3 mm (1.4 in)	24 years	46 of 100 (Notable)
18 August 1981	Cartersville, US	daily low max	24.4 C (75.9 F)	2.8 C (5.0 F)	83 years	44 of 100 (Notable)
18 August 1981	Ft Kent, US	daily rain	50.8 mm (2.0 in)	31.0 mm (1.2 in)	30 years	44 of 100 (Notable)
18 August 1981	Henderson 2 NNW, US	monthly low min	5.0 C (41.0 F)	1.1 C (2.0 F)	76 years	44 of 100 (Notable)
18 August 1981	Ruhnu, LV	daily rain	31.6 mm (1.2 in)	11.4 mm (0.4 in)	75 years	43 of 100 (Notable)
18 August 1981	Puente San Isidro, MX	daily rain	39.9 mm (1.6 in)	25.9 mm (1.0 in)	28 years	43 of 100 (Notable)
18 August 1981	Little Mtn, US	daily low max	22.8 C (73.0 F)	3.3 C (5.9 F)	83 years	43 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

1797 to 1981

Records set or tied on this calendar date in each year from 1797 to 1981. 1981 had 1,386 records.

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

Records on 08-18 in each year
Year	Records
1797	2
1805	1
1816	1
1827	1
1829	1
1830	1
1833	1
1841	1
1844	1
1845	3
1846	1
1847	1
1849	1
1851	1
1852	1
1853	1
1854	2
1855	1
1856	1
1861	1
1864	2
1866	1
1868	2
1869	1
1870	2
1872	1
1873	1
1875	3
1876	1
1878	1
1879	2
1883	3
1885	3
1886	3
1887	3
1888	2
1889	1
1890	1
1891	2
1892	6
1893	4
1894	4
1895	1
1898	4
1899	6
1900	2
1901	10
1902	8
1903	6
1904	8
1905	10
1906	40
1907	7
1908	21
1909	24
1910	16
1911	11
1912	21
1913	43
1914	37
1915	60
1916	71
1917	70
1918	53
1919	34
1920	51
1921	39
1922	129
1923	90
1924	225
1925	300
1926	168
1927	269
1928	141
1929	181
1930	150
1931	241
1932	382
1933	431
1934	638
1935	424
1936	766
1937	308
1938	243
1939	381
1940	434
1941	467
1942	333
1943	738
1944	325
1945	400
1946	416
1947	958
1948	315
1949	393
1950	683
1951	355
1952	405
1953	323
1954	622
1955	795
1956	580
1957	380
1958	580
1959	537
1960	599
1961	415
1962	428
1963	760
1964	443
1965	525
1966	573
1967	623
1968	795
1969	530
1970	597
1971	381
1972	493
1973	734
1974	639
1975	844
1976	917
1977	1,112
1978	854
1979	1,309
1980	771
1981	1,386
1982	563
1983	1,420
1984	600
1985	765
1986	861
1987	1,609
1988	1,351
1989	952
1990	920
1991	533
1992	1,497
1993	706
1994	1,027
1995	1,882
1996	760
1997	1,191
1998	923
1999	888
2000	1,183
2001	1,036
2002	1,306
2003	860
2004	1,050
2005	865
2006	842
2007	1,116
2008	1,265
2009	839
2010	1,167
2011	1,239
2012	1,247
2013	752
2014	751
2015	880
2016	704
2017	565
2018	462
2019	615
2020	1,541
2021	1,118
2022	1,236
2023	1,094
2024	696
2025	455
2026	545

Download the Data

Data for records on 1981-08-18: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 10	970
10 to 20	72
20 to 30	28
30 to 40	8
40 to 50	7
50 to 60	4
60 to 70	1
70 to 80	2