Weather Records on 17 April 1984

720 weather records were set or tied worldwide on 17 April 1984. Highest significance: Mossman Post Office, AU.

Key Facts for 17 April 1984

On 17 April 1984, 720 weather records were set or tied at long-record stations worldwide.
232 were record highs and 258 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 710 daily.
Mossman Post Office set a daily record precipitation of 216.8 mm (8.5 in) on 17 April 1984.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 451 records.

Record Map

720 stations

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

Weather records on 17 April 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mossman Post Office	Australia	Record daily precipitation	216.8 mm (8.5 in)	61 of 100 (Major)
Cape Tribulation Store	Australia	Record daily precipitation	186.5 mm (7.3 in)	55 of 100 (Notable)
Mount Olive	Australia	Record daily precipitation	164.2 mm (6.5 in)	51 of 100 (Notable)
Fazenda Rio Preto	Brazil	Record daily precipitation	57.7 mm (2.3 in)	50 of 100 (Notable)
Bijie	China	Record daily precipitation	34.8 mm (1.4 in)	50 of 100 (Notable)
Whyanbeel Valley	Australia	Record daily precipitation	215.0 mm (8.5 in)	47 of 100 (Notable)
Barmedman Post Office	Australia	Record daily precipitation	31.0 mm (1.2 in)	44 of 100 (Notable)
Canton 4 SE	United States	Record daily precipitation	32.5 mm (1.3 in)	44 of 100 (Notable)
Cooktown Post Office	Australia	Record daily precipitation	110.8 mm (4.4 in)	43 of 100 (Notable)
Minnie Creek	Australia	Record daily precipitation	30.0 mm (1.2 in)	40 of 100 (Notable)
Cairns Aero	Australia	Record daily precipitation	185.8 mm (7.3 in)	39 of 100 (Notable)
Betanga	Australia	Record daily precipitation	25.0 mm (1.0 in)	39 of 100 (Notable)
Lowan Hills	Australia	Record daily precipitation	44.8 mm (1.8 in)	39 of 100 (Notable)
Tamandua	Brazil	Record daily precipitation	46.9 mm (1.8 in)	39 of 100 (Notable)
New Meadows Rs	United States	Record high minimum temperature	5.6 C (42.1 F)	38 of 100 (Notable)
Mossman Central Mill	Australia	Record daily precipitation	218.0 mm (8.6 in)	37 of 100 (Notable)
Olimpia	Brazil	Record daily precipitation	29.7 mm (1.2 in)	37 of 100 (Notable)
Warren	United States	Record high minimum temperature	0.6 C (33.1 F)	37 of 100 (Notable)
Dyer 5S	United States	Record high minimum temperature	10.0 C (50.0 F)	37 of 100 (Notable)
Kowanyama Airport	Australia	Record daily precipitation	48.2 mm (1.9 in)	36 of 100 (Notable)
Glenorie	Australia	Record daily precipitation	40.0 mm (1.6 in)	36 of 100 (Notable)
Monte Alegre Do Sul	Brazil	Record daily precipitation	56.8 mm (2.2 in)	36 of 100 (Notable)
Bozeman Montana State UNIV	United States	Record high maximum temperature	24.4 C (75.9 F)	36 of 100 (Notable)
Kotzebue AP	United States	Record low maximum temperature	-21.1 C (-6.0 F)	36 of 100 (Notable)
Mossman South Alchera Drive	Australia	Record daily precipitation	233.0 mm (9.2 in)	35 of 100 (Notable)
Beaconsfield	Australia	Record daily precipitation	32.6 mm (1.3 in)	35 of 100 (Notable)
Monte Verde Paulista	Brazil	Record daily precipitation	41.9 mm (1.6 in)	35 of 100 (Notable)
Menard	United States	Record low minimum temperature	-1.1 C (30.0 F)	35 of 100 (Notable)
Sonora	United States	Record low minimum temperature	0.0 C (32.0 F)	35 of 100 (Notable)
Sao Caetano Do Sul	Brazil	Record daily precipitation	63.5 mm (2.5 in)	34 of 100 (Routine)
Pueblo Nuevo	Mexico	Record low minimum temperature	13.9 C (57.0 F)	34 of 100 (Routine)
Morgan 1 W	United States	Record low maximum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Middlesboro Fire Dept	United States	Record low maximum temperature	10.6 C (51.1 F)	33 of 100 (Routine)
Fallon Exp STN	United States	Record high minimum temperature	8.3 C (46.9 F)	33 of 100 (Routine)
San Saba	United States	Record low minimum temperature	1.1 C (34.0 F)	33 of 100 (Routine)
Usina Gaviao Peixoto (Cpfl)	Brazil	Record daily precipitation	72.4 mm (2.9 in)	32 of 100 (Routine)
Surgut	Russia	Record low maximum temperature	-13.4 C (7.9 F)	32 of 100 (Routine)
Northam	Australia	Record high minimum temperature	19.0 C (66.2 F)	31 of 100 (Routine)
Pirassununga	Brazil	Record daily precipitation	30.9 mm (1.2 in)	31 of 100 (Routine)
Macucos	Brazil	Record daily precipitation	32.1 mm (1.3 in)	31 of 100 (Routine)
Valentia Observatory	Ireland	Record daily precipitation	51.0 mm (2.0 in)	31 of 100 (Routine)
Spicer	United States	Record snow depth	66.0 cm (26.0 in)	31 of 100 (Routine)
Pascagoula 3 NE	United States	Record low maximum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Lakeview	United States	Record daily precipitation	32.8 mm (1.3 in)	31 of 100 (Routine)
Mc Minnville	United States	Record low maximum temperature	9.4 C (48.9 F)	31 of 100 (Routine)
Harden Park	Australia	Record daily precipitation	34.6 mm (1.4 in)	30 of 100 (Routine)
Mirassol	Brazil	Record daily precipitation	34.6 mm (1.4 in)	30 of 100 (Routine)
Bastia	France	Record daily precipitation	36.9 mm (1.5 in)	30 of 100 (Routine)
Haugan 1 W	United States	Record high minimum temperature	7.2 C (45.0 F)	30 of 100 (Routine)
Eureka	United States	Record high minimum temperature	8.3 C (46.9 F)	30 of 100 (Routine)
Worland	United States	Record high maximum temperature	27.8 C (82.0 F)	30 of 100 (Routine)
Lansdowne Station	Australia	Record daily precipitation	36.5 mm (1.4 in)	29 of 100 (Routine)
Karasjok	Norway	Record snow depth	78.0 cm (30.7 in)	29 of 100 (Routine)
Kolpasevo	Russia	Record low maximum temperature	-9.1 C (15.6 F)	29 of 100 (Routine)
Enisejsk	Russia	Record low maximum temperature	-5.7 C (21.7 F)	29 of 100 (Routine)
Novosibirsk	Russia	Record low maximum temperature	-6.4 C (20.5 F)	29 of 100 (Routine)
Red Lodge	United States	Record high maximum temperature	23.3 C (73.9 F)	29 of 100 (Routine)
Laurier	United States	Record high minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
Wellpinit	United States	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Rio Abaixo (Faz.Cachoeira)	Brazil	Record daily precipitation	42.5 mm (1.7 in)	28 of 100 (Routine)

Counts by Type and Timescale

720 records

Records set or tied on 17 April 1984 by type: Highest daily maximum 115, Lowest daily maximum 119, Highest daily minimum 117, Lowest daily minimum 139, Heaviest daily rainfall 214, Heaviest daily snowfall 6, Deepest snow cover 10.

Records on 17 April 1984 by type
Record type	Records
Highest daily maximum	115
Lowest daily maximum	119
Highest daily minimum	117
Lowest daily minimum	139
Heaviest daily rainfall	214
Heaviest daily snowfall	6
Deepest snow cover	10

Records on 17 April 1984 by timescale: all-time 0, monthly 10, daily 710.

How Much Records Were Beaten By

581 broken records

Margins by which the 581 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 183.2. Ties are not counted.

Top 20 by Significance

17 April 1984

Top 20 records on 17 April 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1984	Mossman Post Office, AU	daily rain	216.8 mm (8.5 in)	120.3 mm (4.7 in)	51 years	61 of 100 (Major)
17 April 1984	Cape Tribulation Store, AU	daily rain	186.5 mm (7.3 in)	144.8 mm (5.7 in)	42 years	55 of 100 (Notable)
17 April 1984	Mount Olive, AU	daily rain	164.2 mm (6.5 in)	133.2 mm (5.2 in)	29 years	51 of 100 (Notable)
17 April 1984	Fazenda Rio Preto, BR	daily rain	57.7 mm (2.3 in)	57.7 mm (2.3 in)	34 years	50 of 100 (Notable)
17 April 1984	Bijie, CN	daily rain	34.8 mm (1.4 in)	28.7 mm (1.1 in)	25 years	50 of 100 (Notable)
17 April 1984	Whyanbeel Valley, AU	daily rain	215.0 mm (8.5 in)	183.2 mm (7.2 in)	13 years	47 of 100 (Notable)
17 April 1984	Barmedman Post Office, AU	daily rain	31.0 mm (1.2 in)	10.7 mm (0.4 in)	89 years	44 of 100 (Notable)
17 April 1984	Canton 4 SE, US	daily rain	32.5 mm (1.3 in)	6.3 mm (0.25 in)	87 years	44 of 100 (Notable)
17 April 1984	Cooktown Post Office, AU	daily rain	110.8 mm (4.4 in)	19.6 mm (0.8 in)	87 years	43 of 100 (Notable)
17 April 1984	Minnie Creek, AU	daily rain	30.0 mm (1.2 in)	23.4 mm (0.9 in)	71 years	40 of 100 (Notable)
17 April 1984	Cairns Aero, AU	monthly rain	185.8 mm (7.3 in)	28.8 mm (1.1 in)	34 years	39 of 100 (Notable)
17 April 1984	Betanga, AU	daily rain	25.0 mm (1.0 in)	22.0 mm (0.9 in)	73 years	39 of 100 (Notable)
17 April 1984	Lowan Hills, AU	daily rain	44.8 mm (1.8 in)	39.0 mm (1.5 in)	27 years	39 of 100 (Notable)
17 April 1984	Tamandua, BR	daily rain	46.9 mm (1.8 in)	36.9 mm (1.5 in)	33 years	39 of 100 (Notable)
17 April 1984	New Meadows Rs, US	daily high min	5.6 C (42.1 F)	2.8 C (5.0 F)	78 years	38 of 100 (Notable)
17 April 1984	Mossman Central Mill, AU	daily rain	218.0 mm (8.6 in)	27.8 mm (1.1 in)	73 years	37 of 100 (Notable)
17 April 1984	Olimpia, BR	daily rain	29.7 mm (1.2 in)	26.7 mm (1.1 in)	44 years	37 of 100 (Notable)
17 April 1984	Warren, US	daily high min	0.6 C (33.1 F)	1.2 C (2.2 F)	88 years	37 of 100 (Notable)
17 April 1984	Dyer 5S, US	daily high min	10.0 C (50.0 F)	4.4 C (7.9 F)	65 years	37 of 100 (Notable)
17 April 1984	Kowanyama Airport, AU	daily rain	48.2 mm (1.9 in)	42.1 mm (1.7 in)	28 years	36 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

1799 to 1984

Records set or tied on this calendar date in each year from 1799 to 1984. 1984 had 720 records.

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

Records on 04-17 in each year
Year	Records
1799	1
1807	1
1808	1
1815	1
1817	1
1818	1
1819	1
1823	1
1825	1
1830	1
1835	3
1837	1
1845	1
1847	2
1851	1
1852	3
1853	1
1854	1
1855	1
1857	1
1858	1
1862	1
1865	2
1868	1
1873	4
1874	1
1875	3
1877	4
1878	2
1880	2
1889	1
1890	2
1891	2
1892	4
1894	5
1895	1
1896	5
1897	6
1898	3
1899	1
1900	2
1901	4
1902	4
1903	5
1904	19
1905	11
1906	14
1907	16
1908	38
1909	7
1910	29
1911	33
1912	27
1913	20
1914	83
1915	30
1916	30
1917	32
1918	35
1919	39
1920	87
1921	148
1922	96
1923	71
1924	74
1925	103
1926	140
1927	256
1928	308
1929	145
1930	238
1931	216
1932	615
1933	261
1934	234
1935	374
1936	308
1937	439
1938	564
1939	618
1940	337
1941	460
1942	415
1943	285
1944	334
1945	475
1946	492
1947	461
1948	622
1949	439
1950	293
1951	441
1952	529
1953	818
1954	650
1955	394
1956	486
1957	277
1958	702
1959	434
1960	553
1961	667
1962	597
1963	702
1964	766
1965	411
1966	409
1967	935
1968	745
1969	728
1970	547
1971	924
1972	546
1973	589
1974	244
1975	666
1976	1,630
1977	906
1978	620
1979	810
1980	675
1981	621
1982	965
1983	1,365
1984	720
1985	917
1986	997
1987	960
1988	1,082
1989	638
1990	1,065
1991	614
1992	1,105
1993	847
1994	1,047
1995	1,211
1996	1,044
1997	889
1998	1,795
1999	1,730
2000	1,082
2001	1,013
2002	2,284
2003	1,037
2004	761
2005	572
2006	1,430
2007	863
2008	842
2009	779
2010	606
2011	982
2012	920
2013	1,796
2014	913
2015	813
2016	977
2017	469
2018	1,585
2019	458
2020	1,165
2021	701
2022	831
2023	628
2024	690
2025	1,058
2026	838

Download the Data

Data for records on 1984-04-17: 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 25	546
25 to 50	25
50 to 75	3
75 to 100	1
100 to 125	2
125 to 150	3
150 to 175	0
175 to 200	1