Weather Records on 15 August 1984

622 weather records were set or tied worldwide on 15 August 1984. Highest significance: Chasm Falls, US.

Key Facts for 15 August 1984

On 15 August 1984, 622 weather records were set or tied at long-record stations worldwide.
220 were record highs and 193 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 19 monthly and 601 daily.
Chasm Falls set a daily record precipitation of 64.8 mm (2.6 in) on 15 August 1984.
Across 168 earlier years (1793 to 2026) the same calendar date averaged 454 records.

Record Map

622 stations

622 station records on 15 August 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 August 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Chasm Falls	United States	Record daily precipitation	64.8 mm (2.6 in)	61 of 100 (Major)
Loa	United States	Record daily precipitation	29.2 mm (1.1 in)	61 of 100 (Major)
Wisley	United Kingdom	Record daily precipitation	54.4 mm (2.1 in)	57 of 100 (Notable)
Koosharem	United States	Record daily precipitation	37.1 mm (1.5 in)	50 of 100 (Notable)
Presa Ansaldo	Mexico	Record daily precipitation	63.8 mm (2.5 in)	49 of 100 (Notable)
Newark	United States	Record daily precipitation	79.0 mm (3.1 in)	49 of 100 (Notable)
Trona	United States	Record daily precipitation	57.2 mm (2.3 in)	47 of 100 (Notable)
Camacho	Mexico	Record daily precipitation	81.8 mm (3.2 in)	44 of 100 (Notable)
Biser	Russia	Record daily precipitation	47.1 mm (1.9 in)	44 of 100 (Notable)
Biloxi	United States	Record low minimum temperature	17.8 C (64.0 F)	43 of 100 (Notable)
Hewitt	United States	Record daily precipitation	64.3 mm (2.5 in)	43 of 100 (Notable)
Tierra Blanca (Smn)	Mexico	Record low minimum temperature	12.8 C (55.0 F)	42 of 100 (Notable)
Lancaster	United States	Record high minimum temperature	19.4 C (66.9 F)	42 of 100 (Notable)
Budgeree East (Claremont)	Australia	Record daily precipitation	69.0 mm (2.7 in)	41 of 100 (Notable)
Tanegashima	Japan	Record daily precipitation	117.0 mm (4.6 in)	41 of 100 (Notable)
Totolapa (Smn)	Mexico	Record daily precipitation	50.8 mm (2.0 in)	41 of 100 (Notable)
Poteet	United States	Record daily precipitation	82.6 mm (3.3 in)	41 of 100 (Notable)
Newark Liberty Intl AP	United States	Record high minimum temperature	25.0 C (77.0 F)	41 of 100 (Notable)
Wolcott 3 NW	United States	Record daily precipitation	47.8 mm (1.9 in)	40 of 100 (Notable)
Laguna del Fresno	Mexico	Record daily precipitation	46.0 mm (1.8 in)	39 of 100 (Notable)
Tucson Magnetic Obsy	United States	Record daily precipitation	40.1 mm (1.6 in)	38 of 100 (Notable)
Washington Sp	United States	Record daily precipitation	43.9 mm (1.7 in)	37 of 100 (Notable)
Scottsbluff W B Heilig Fld AP	United States	Record high minimum temperature	20.6 C (69.1 F)	37 of 100 (Notable)
Cernuska	Russia	Record daily precipitation	28.7 mm (1.1 in)	36 of 100 (Notable)
Kurgan	Russia	Record high minimum temperature	18.5 C (65.3 F)	36 of 100 (Notable)
Saratoga	United States	Record daily precipitation	26.2 mm (1.0 in)	36 of 100 (Notable)
Jaina	Mexico	Record daily precipitation	62.2 mm (2.4 in)	35 of 100 (Notable)
Puente Jula	Mexico	Record low maximum temperature	22.8 C (73.0 F)	35 of 100 (Notable)
Syktyvkar	Russia	Record low maximum temperature	8.8 C (47.8 F)	34 of 100 (Routine)
Nicosia	Cyprus	Record daily precipitation	25.8 mm (1.0 in)	33 of 100 (Routine)
Saint Johns	United States	Record daily precipitation	30.5 mm (1.2 in)	33 of 100 (Routine)
Erick	United States	Record low minimum temperature	10.0 C (50.0 F)	33 of 100 (Routine)
San Bartolo	Mexico	Record low minimum temperature	11.7 C (53.1 F)	32 of 100 (Routine)
San Sebastian del Oeste	Mexico	Record low minimum temperature	8.9 C (48.0 F)	32 of 100 (Routine)
Ajo	United States	Record low maximum temperature	31.1 C (88.0 F)	32 of 100 (Routine)
Aledo	United States	Record high minimum temperature	23.9 C (75.0 F)	32 of 100 (Routine)
Dilley	United States	Record low minimum temperature	18.3 C (64.9 F)	32 of 100 (Routine)
Juchitan de Zaragoza	Mexico	Record low minimum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Telchaquillo	Mexico	Record daily precipitation	55.9 mm (2.2 in)	30 of 100 (Routine)
Inyokern	United States	Record daily precipitation	60.7 mm (2.4 in)	30 of 100 (Routine)
Huerta Vieja	Mexico	Record daily precipitation	37.8 mm (1.5 in)	29 of 100 (Routine)
Tierra Blanca (Smn)	Mexico	Record low maximum temperature	26.7 C (80.1 F)	29 of 100 (Routine)
Yajlju	Russia	Record daily precipitation	33.4 mm (1.3 in)	29 of 100 (Routine)
Poplarville Exp STN	United States	Record low maximum temperature	28.3 C (82.9 F)	29 of 100 (Routine)
New Kingston	United States	Record daily precipitation	44.7 mm (1.8 in)	29 of 100 (Routine)
Norfolk	United States	Record daily precipitation	44.5 mm (1.8 in)	29 of 100 (Routine)
San Sebastian del Oeste	Mexico	Record high maximum temperature	34.4 C (93.9 F)	28 of 100 (Routine)
Belfast	United States	Record daily precipitation	30.5 mm (1.2 in)	28 of 100 (Routine)
Port Washington	United States	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)
Aburatsu	Japan	Record daily precipitation	148.5 mm (5.8 in)	27 of 100 (Routine)
Inza	Russia	Record daily precipitation	27.5 mm (1.1 in)	27 of 100 (Routine)
Tuapse	Russia	Record daily precipitation	76.0 mm (3.0 in)	27 of 100 (Routine)
Bridgeport	United States	Record high minimum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Smiths Basin	United States	Record daily precipitation	33.0 mm (1.3 in)	27 of 100 (Routine)
Enosburg Falls	United States	Record daily precipitation	33.8 mm (1.3 in)	27 of 100 (Routine)
Heyuan	China	Record daily precipitation	52.7 mm (2.1 in)	26 of 100 (Routine)
Atzalan	Mexico	Record low maximum temperature	16.7 C (62.1 F)	26 of 100 (Routine)
Kane 1NNE	United States	Record daily precipitation	35.6 mm (1.4 in)	26 of 100 (Routine)
Conroe	United States	Record daily precipitation	43.2 mm (1.7 in)	26 of 100 (Routine)
Heber	United States	Record high minimum temperature	15.6 C (60.1 F)	26 of 100 (Routine)

Counts by Type and Timescale

622 records

Records set or tied on 15 August 1984 by type: Highest daily maximum 82, Lowest daily maximum 107, Highest daily minimum 138, Lowest daily minimum 86, Heaviest daily rainfall 209.

Records on 15 August 1984 by type
Record type	Records
Highest daily maximum	82
Lowest daily maximum	107
Highest daily minimum	138
Lowest daily minimum	86
Heaviest daily rainfall	209
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 August 1984 by timescale: all-time 2, monthly 19, daily 601.

How Much Records Were Beaten By

458 broken records

Margins by which the 458 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 83.7. Ties are not counted.

Top 20 by Significance

15 August 1984

Top 20 records on 15 August 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 August 1984	Chasm Falls, US	daily rain	64.8 mm (2.6 in)	43.7 mm (1.7 in)	54 years	61 of 100 (Major)
15 August 1984	Loa, US	daily rain	29.2 mm (1.1 in)	18.0 mm (0.7 in)	47 years	61 of 100 (Major)
15 August 1984	Wisley, GB	daily rain	54.4 mm (2.1 in)	23.7 mm (0.9 in)	32 years	57 of 100 (Notable)
15 August 1984	Koosharem, US	monthly rain	37.1 mm (1.5 in)	6.6 mm (0.26 in)	57 years	50 of 100 (Notable)
15 August 1984	Presa Ansaldo, MX	daily rain	63.8 mm (2.5 in)	42.7 mm (1.7 in)	21 years	49 of 100 (Notable)
15 August 1984	Newark, US	daily rain	79.0 mm (3.1 in)	53.1 mm (2.1 in)	12 years	49 of 100 (Notable)
15 August 1984	Trona, US	all-time rain	57.2 mm (2.3 in)	8.4 mm (0.33 in)	20 years	47 of 100 (Notable)
15 August 1984	Camacho, MX	daily rain	81.8 mm (3.2 in)	69.9 mm (2.8 in)	26 years	44 of 100 (Notable)
15 August 1984	Biser, RU	daily rain	47.1 mm (1.9 in)	9.6 mm (0.38 in)	78 years	44 of 100 (Notable)
15 August 1984	Biloxi, US	daily low min	17.8 C (64.0 F)	1.6 C (2.9 F)	84 years	43 of 100 (Notable)
15 August 1984	Hewitt, US	daily rain	64.3 mm (2.5 in)	48.8 mm (1.9 in)	15 years	43 of 100 (Notable)
15 August 1984	Tierra Blanca (Smn), MX	daily low min	12.8 C (55.0 F)	3.9 C (7.0 F)	61 years	42 of 100 (Notable)
15 August 1984	Lancaster, US	daily high min	19.4 C (66.9 F)	3.3 C (5.9 F)	89 years	42 of 100 (Notable)
15 August 1984	Budgeree East (Claremont), AU	daily rain	69.0 mm (2.7 in)	20.7 mm (0.8 in)	28 years	41 of 100 (Notable)
15 August 1984	Tanegashima, JP	daily rain	117.0 mm (4.6 in)	83.7 mm (3.3 in)	27 years	41 of 100 (Notable)
15 August 1984	Totolapa (Smn), MX	daily rain	50.8 mm (2.0 in)	31.0 mm (1.2 in)	24 years	41 of 100 (Notable)
15 August 1984	Poteet, US	daily rain	82.6 mm (3.3 in)	73.7 mm (2.9 in)	22 years	41 of 100 (Notable)
15 August 1984	Newark Liberty Intl AP, US	daily high min	25.0 C (77.0 F)	0.6 C (1.1 F)	111 years	41 of 100 (Notable)
15 August 1984	Wolcott 3 NW, US	daily rain	47.8 mm (1.9 in)	39.4 mm (1.6 in)	7 years	40 of 100 (Notable)
15 August 1984	Laguna del Fresno, MX	daily rain	46.0 mm (1.8 in)	25.7 mm (1.0 in)	25 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 1984

Records set or tied on this calendar date in each year from 1793 to 1984. 1984 had 622 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 1984-08-15: 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	430
20 to 40	18
40 to 60	7
60 to 80	2
80 to 100	1