Weather Records on 17 August 1984

726 weather records were set or tied worldwide on 17 August 1984. Highest significance: Park Valley, US.

Key Facts for 17 August 1984

On 17 August 1984, 726 weather records were set or tied at long-record stations worldwide.
225 were record highs and 225 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 29 monthly and 695 daily.
Park Valley set an all-time record daily precipitation of 72.1 mm (2.8 in) on 17 August 1984.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 472 records.

Record Map

726 stations

726 station records on 17 August 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Park Valley	United States	Record daily precipitation	72.1 mm (2.8 in)	69 of 100 (Major)
Bom Jesus Do Galho	Brazil	Record daily precipitation	28.8 mm (1.1 in)	56 of 100 (Notable)
Gumeracha	Australia	Record daily precipitation	40.6 mm (1.6 in)	55 of 100 (Notable)
Montpelier	United States	Record daily precipitation	50.8 mm (2.0 in)	55 of 100 (Notable)
Bakuriani	Georgia	Record daily precipitation	59.0 mm (2.3 in)	53 of 100 (Notable)
Itarana	Brazil	Record daily precipitation	33.8 mm (1.3 in)	52 of 100 (Notable)
Sao Joao de Petropolis	Brazil	Record daily precipitation	27.2 mm (1.1 in)	49 of 100 (Notable)
Elatma	Russia	Record low minimum temperature	3.9 C (39.0 F)	43 of 100 (Notable)
Faith	United States	Record daily precipitation	58.4 mm (2.3 in)	42 of 100 (Notable)
Acaiaca-Jusante	Brazil	Record daily precipitation	40.9 mm (1.6 in)	41 of 100 (Notable)
Descanso Rs	United States	Record daily precipitation	93.2 mm (3.7 in)	41 of 100 (Notable)
Guarapari (Dnos)	Brazil	Record daily precipitation	87.0 mm (3.4 in)	40 of 100 (Notable)
Holyoke	United States	Record high minimum temperature	20.0 C (68.0 F)	40 of 100 (Notable)
Mexia	United States	Record low minimum temperature	15.0 C (59.0 F)	40 of 100 (Notable)
Lagoa Grande (Mmv)	Brazil	Record daily precipitation	25.2 mm (1.0 in)	39 of 100 (Notable)
Saint Leo	United States	Record high minimum temperature	24.4 C (75.9 F)	39 of 100 (Notable)
Chester	United States	Record high minimum temperature	18.9 C (66.0 F)	38 of 100 (Notable)
Ft Benton	United States	Record high minimum temperature	18.3 C (64.9 F)	38 of 100 (Notable)
Raipur	India	Record daily precipitation	156.0 mm (6.1 in)	37 of 100 (Notable)
Seattle Urban Site	United States	Record high minimum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Birdwood	Australia	Record daily precipitation	28.2 mm (1.1 in)	36 of 100 (Notable)
San Sebastian del Oeste	Mexico	Record low minimum temperature	10.6 C (51.1 F)	35 of 100 (Notable)
Toms River	United States	Record high maximum temperature	33.3 C (91.9 F)	35 of 100 (Notable)
Newark	United States	Record daily precipitation	40.1 mm (1.6 in)	35 of 100 (Notable)
Valentia Observatory	Ireland	Record daily precipitation	35.2 mm (1.4 in)	33 of 100 (Routine)
El Rosarito	Mexico	Record daily precipitation	45.0 mm (1.8 in)	33 of 100 (Routine)
Billings Wtp	United States	Record high minimum temperature	19.4 C (66.9 F)	33 of 100 (Routine)
Rapelje	United States	Record high minimum temperature	18.3 C (64.9 F)	33 of 100 (Routine)
Wauseon Wtp	United States	Record high minimum temperature	22.2 C (72.0 F)	33 of 100 (Routine)
Blaine	United States	Record high minimum temperature	16.1 C (61.0 F)	33 of 100 (Routine)
Jacksonville NAS	United States	Record daily precipitation	71.6 mm (2.8 in)	33 of 100 (Routine)
Dergholm (Hillgrove)	Australia	Record daily precipitation	26.0 mm (1.0 in)	31 of 100 (Routine)
Guerrero (Smn)	Mexico	Record low maximum temperature	18.3 C (64.9 F)	31 of 100 (Routine)
Totatiche	Mexico	Record high maximum temperature	32.8 C (91.0 F)	31 of 100 (Routine)
Urmi	Russia	Record daily precipitation	77.1 mm (3.0 in)	31 of 100 (Routine)
Melbourne WFO	United States	Record low maximum temperature	26.7 C (80.1 F)	31 of 100 (Routine)
Laranja da Terra	Brazil	Record daily precipitation	34.3 mm (1.4 in)	30 of 100 (Routine)
Aleksandrovskoe	Russia	Record high minimum temperature	21.0 C (69.8 F)	30 of 100 (Routine)
Sredny Vasjugan	Russia	Record high maximum temperature	31.4 C (88.5 F)	30 of 100 (Routine)
Nogliki	Russia	Record daily precipitation	36.6 mm (1.4 in)	30 of 100 (Routine)
Grass Range	United States	Record high minimum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Bellingham 2 N	United States	Record high minimum temperature	16.7 C (62.1 F)	30 of 100 (Routine)
Jackson	United States	Record high minimum temperature	11.7 C (53.1 F)	30 of 100 (Routine)
Jaral de Berrios	Mexico	Record daily precipitation	39.1 mm (1.5 in)	29 of 100 (Routine)
Kursk	Russia	Record low minimum temperature	6.9 C (44.4 F)	29 of 100 (Routine)
Crescent City	United States	Record high maximum temperature	36.7 C (98.1 F)	29 of 100 (Routine)
Caldwell	United States	Record high minimum temperature	18.3 C (64.9 F)	29 of 100 (Routine)
Hyannis	United States	Record high maximum temperature	31.7 C (89.1 F)	29 of 100 (Routine)
Southport 5 N	United States	Record high maximum temperature	35.6 C (96.1 F)	29 of 100 (Routine)
Loreto (Dge)	Mexico	Record low minimum temperature	15.6 C (60.1 F)	28 of 100 (Routine)
Moroleon	Mexico	Record low maximum temperature	21.7 C (71.1 F)	28 of 100 (Routine)
Cuautla (Smn)	Mexico	Record low maximum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
Sredny Vasjugan	Russia	Record high minimum temperature	18.7 C (65.7 F)	28 of 100 (Routine)
Khorog	Tajikistan	Record high maximum temperature	35.0 C (95.0 F)	28 of 100 (Routine)
Reserve Rs	United States	Record daily precipitation	34.5 mm (1.4 in)	28 of 100 (Routine)
Ochoco Rs	United States	Record low minimum temperature	-5.6 C (21.9 F)	28 of 100 (Routine)
Pearsall	United States	Record low minimum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Port Townsend	United States	Record high minimum temperature	14.4 C (57.9 F)	28 of 100 (Routine)
Gustavus	United States	Record low minimum temperature	0.0 C (32.0 F)	28 of 100 (Routine)
Cudlee Creek (Millbrook)	Australia	Record daily precipitation	37.0 mm (1.5 in)	27 of 100 (Routine)

Counts by Type and Timescale

726 records

Records set or tied on 17 August 1984 by type: Highest daily maximum 84, Lowest daily maximum 113, Highest daily minimum 141, Lowest daily minimum 112, Heaviest daily rainfall 276.

Records on 17 August 1984 by type
Record type	Records
Highest daily maximum	84
Lowest daily maximum	113
Highest daily minimum	141
Lowest daily minimum	112
Heaviest daily rainfall	276
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 1984 by timescale: all-time 2, monthly 29, daily 695.

How Much Records Were Beaten By

571 broken records

Margins by which the 571 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.0. Ties are not counted.

Top 20 by Significance

17 August 1984

Top 20 records on 17 August 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 1984	Park Valley, US	all-time rain	72.1 mm (2.8 in)	27.6 mm (1.1 in)	9 years	69 of 100 (Major)
17 August 1984	Bom Jesus Do Galho, BR	daily rain	28.8 mm (1.1 in)	28.8 mm (1.1 in)	43 years	56 of 100 (Notable)
17 August 1984	Gumeracha, AU	daily rain	40.6 mm (1.6 in)	20.3 mm (0.8 in)	62 years	55 of 100 (Notable)
17 August 1984	Montpelier, US	daily rain	50.8 mm (2.0 in)	31.5 mm (1.2 in)	70 years	55 of 100 (Notable)
17 August 1984	Bakuriani, GE	daily rain	59.0 mm (2.3 in)	38.0 mm (1.5 in)	31 years	53 of 100 (Notable)
17 August 1984	Itarana, BR	daily rain	33.8 mm (1.3 in)	31.9 mm (1.3 in)	32 years	52 of 100 (Notable)
17 August 1984	Sao Joao de Petropolis, BR	daily rain	27.2 mm (1.1 in)	17.9 mm (0.7 in)	20 years	49 of 100 (Notable)
17 August 1984	Elatma, RU	daily low min	3.9 C (39.0 F)	2.5 C (4.5 F)	90 years	43 of 100 (Notable)
17 August 1984	Faith, US	daily rain	58.4 mm (2.3 in)	30.5 mm (1.2 in)	2 years	42 of 100 (Notable)
17 August 1984	Acaiaca-Jusante, BR	daily rain	40.9 mm (1.6 in)	27.5 mm (1.1 in)	21 years	41 of 100 (Notable)
17 August 1984	Descanso Rs, US	monthly rain	93.2 mm (3.7 in)	17.5 mm (0.7 in)	37 years	41 of 100 (Notable)
17 August 1984	Guarapari (Dnos), BR	daily rain	87.0 mm (3.4 in)	40.5 mm (1.6 in)	3 years	40 of 100 (Notable)
17 August 1984	Holyoke, US	daily high min	20.0 C (68.0 F)	2.2 C (4.0 F)	84 years	40 of 100 (Notable)
17 August 1984	Mexia, US	daily low min	15.0 C (59.0 F)	3.3 C (5.9 F)	51 years	40 of 100 (Notable)
17 August 1984	Lagoa Grande (Mmv), BR	daily rain	25.2 mm (1.0 in)	21.4 mm (0.8 in)	21 years	39 of 100 (Notable)
17 August 1984	Saint Leo, US	daily high min	24.4 C (75.9 F)	0.5 C (0.9 F)	86 years	39 of 100 (Notable)
17 August 1984	Chester, US	daily high min	18.9 C (66.0 F)	2.8 C (5.0 F)	78 years	38 of 100 (Notable)
17 August 1984	Ft Benton, US	daily high min	18.3 C (64.9 F)	1.6 C (2.9 F)	85 years	38 of 100 (Notable)
17 August 1984	Raipur, IN	daily rain	156.0 mm (6.1 in)	76.0 mm (3.0 in)	10 years	37 of 100 (Notable)
17 August 1984	Seattle Urban Site, US	daily high min	17.8 C (64.0 F)	1.1 C (2.0 F)	76 years	37 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 1984

Records set or tied on this calendar date in each year from 1797 to 1984. 1984 had 726 records.

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

Records on 08-17 in each year
Year	Records
1797	2
1802	2
1820	2
1837	1
1838	2
1841	2
1842	1
1845	2
1853	1
1854	1
1856	1
1857	1
1861	3
1862	1
1867	1
1868	3
1869	1
1872	1
1875	2
1876	5
1879	1
1881	1
1882	1
1883	2
1885	3
1886	1
1888	5
1891	1
1892	3
1893	2
1894	3
1895	2
1896	3
1897	1
1898	5
1899	8
1900	3
1901	14
1902	7
1903	6
1904	2
1905	11
1906	28
1907	9
1908	26
1909	24
1910	17
1911	18
1912	31
1913	79
1914	41
1915	28
1916	33
1917	35
1918	112
1919	37
1920	110
1921	37
1922	169
1923	161
1924	171
1925	130
1926	182
1927	228
1928	131
1929	243
1930	138
1931	302
1932	360
1933	260
1934	377
1935	437
1936	670
1937	726
1938	466
1939	364
1940	341
1941	378
1942	461
1943	743
1944	531
1945	387
1946	433
1947	682
1948	475
1949	371
1950	522
1951	413
1952	470
1953	345
1954	685
1955	465
1956	407
1957	504
1958	519
1959	543
1960	533
1961	998
1962	445
1963	650
1964	410
1965	641
1966	496
1967	679
1968	953
1969	593
1970	467
1971	447
1972	1,044
1973	750
1974	582
1975	612
1976	797
1977	1,216
1978	814
1979	1,464
1980	895
1981	1,112
1982	554
1983	1,574
1984	726
1985	948
1986	916
1987	1,150
1988	1,608
1989	687
1990	949
1991	560
1992	1,813
1993	803
1994	1,038
1995	1,724
1996	752
1997	1,544
1998	1,003
1999	697
2000	994
2001	1,101
2002	1,266
2003	948
2004	1,046
2005	722
2006	814
2007	1,646
2008	1,301
2009	922
2010	1,105
2011	956
2012	1,215
2013	802
2014	997
2015	890
2016	748
2017	544
2018	518
2019	467
2020	1,529
2021	800
2022	1,428
2023	1,032
2024	740
2025	538
2026	535

Download the Data

Data for records on 1984-08-17: 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	510
10 to 20	43
20 to 30	10
30 to 40	6
40 to 50	1
50 to 60	0
60 to 70	0
70 to 80	1