Weather Records on 17 April 1986

997 weather records were set or tied worldwide on 17 April 1986. Highest significance: Tot-Ma, RU.

Key Facts for 17 April 1986

On 17 April 1986, 997 weather records were set or tied at long-record stations worldwide.
133 were record highs and 289 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 20 monthly and 974 daily.
Tot-Ma set a daily record precipitation of 26.6 mm (1.0 in) on 17 April 1986.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 449 records.

Record Map

997 stations

997 station records on 17 April 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tot-Ma	Russia	Record daily precipitation	26.6 mm (1.0 in)	76 of 100 (Major)
Willaura (Main Street)	Australia	Record daily precipitation	42.0 mm (1.7 in)	67 of 100 (Major)
Wickliffe	Australia	Record daily precipitation	37.2 mm (1.5 in)	61 of 100 (Major)
Velsk	Russia	Record daily precipitation	41.7 mm (1.6 in)	60 of 100 (Major)
Jamestown State Hosp	United States	Record snow depth	20.3 cm (8.0 in)	55 of 100 (Notable)
Hammonton 1 NE	United States	Record daily precipitation	52.1 mm (2.1 in)	54 of 100 (Notable)
Willaura (Yarram Park)	Australia	Record daily precipitation	41.0 mm (1.6 in)	52 of 100 (Notable)
Larned	United States	Record daily precipitation	45.7 mm (1.8 in)	51 of 100 (Notable)
Morris Plains 1 W	United States	Record daily precipitation	70.6 mm (2.8 in)	51 of 100 (Notable)
Tenerife/Los Rodeos	Spain	Record daily precipitation	40.1 mm (1.6 in)	50 of 100 (Notable)
Belconnen (Weetangerra)	Australia	Record daily precipitation	29.0 mm (1.1 in)	46 of 100 (Notable)
Heathcote	Australia	Record daily precipitation	40.0 mm (1.6 in)	46 of 100 (Notable)
Oak Ridge Rsvr	United States	Record daily precipitation	70.6 mm (2.8 in)	46 of 100 (Notable)
Colbinabbin	Australia	Record daily precipitation	30.6 mm (1.2 in)	44 of 100 (Notable)
Redesdale	Australia	Record daily precipitation	42.0 mm (1.7 in)	44 of 100 (Notable)
Wombat (Tumbleton)	Australia	Record daily precipitation	31.4 mm (1.2 in)	43 of 100 (Notable)
Murrumburrah Old Post Office	Australia	Record daily precipitation	36.0 mm (1.4 in)	42 of 100 (Notable)
Lake Bolac (Post Office)	Australia	Record daily precipitation	25.8 mm (1.0 in)	42 of 100 (Notable)
Carrolltown 1 NNE	United States	Record daily snowfall	12.7 cm (5.0 in)	42 of 100 (Notable)
Claussville	United States	Record daily precipitation	50.8 mm (2.0 in)	42 of 100 (Notable)
Marion Ctr 2 SE	United States	Record daily snowfall	10.2 cm (4.0 in)	41 of 100 (Notable)
Selinsgrove 2 S	United States	Record daily precipitation	32.0 mm (1.3 in)	41 of 100 (Notable)
Coloso	Puerto Rico [United States]	Record daily precipitation	59.7 mm (2.4 in)	40 of 100 (Notable)
Southport	Australia	Record daily precipitation	38.0 mm (1.5 in)	39 of 100 (Notable)
Manati 2 E	Puerto Rico [United States]	Record low minimum temperature	12.2 C (54.0 F)	39 of 100 (Notable)
Toms River	United States	Record daily precipitation	71.1 mm (2.8 in)	39 of 100 (Notable)
Greeneville Exp STN	United States	Record low maximum temperature	8.3 C (46.9 F)	39 of 100 (Notable)
Asheville	United States	Record low maximum temperature	6.1 C (43.0 F)	39 of 100 (Notable)
Hall (Lochleigh)	Australia	Record daily precipitation	38.0 mm (1.5 in)	38 of 100 (Notable)
Ellerslie Post Office	Australia	Record daily precipitation	32.0 mm (1.3 in)	38 of 100 (Notable)
Karesuando	Sweden	Record low minimum temperature	-23.2 C (-9.8 F)	38 of 100 (Notable)
Onida 4 NW	United States	Record snow depth	12.7 cm (5.0 in)	38 of 100 (Notable)
Rogersville 1 NE	United States	Record low maximum temperature	8.3 C (46.9 F)	38 of 100 (Notable)
Paragonah	United States	Record daily snowfall	25.4 cm (10.0 in)	38 of 100 (Notable)
Big Meadows	United States	Record daily snowfall	11.4 cm (4.5 in)	38 of 100 (Notable)
Douglas Caa AP	United States	Record daily precipitation	25.1 mm (1.0 in)	38 of 100 (Notable)
Young Post Office	Australia	Record daily precipitation	32.0 mm (1.3 in)	37 of 100 (Notable)
Rochester	Australia	Record daily precipitation	27.0 mm (1.1 in)	37 of 100 (Notable)
Ny Westerleigh Stat Is	United States	Record daily precipitation	70.9 mm (2.8 in)	37 of 100 (Notable)
Bolivar Wtr Wks	United States	Record low maximum temperature	11.1 C (52.0 F)	37 of 100 (Notable)
Paragonah	United States	Record snow depth	20.3 cm (8.0 in)	37 of 100 (Notable)
Bedford	United States	Record low maximum temperature	10.0 C (50.0 F)	37 of 100 (Notable)
Big Meadows	United States	Record snow depth	12.7 cm (5.0 in)	37 of 100 (Notable)
Pskem	Uzbekistan	Record daily precipitation	69.9 mm (2.8 in)	37 of 100 (Notable)
Horken	Sweden	Record daily precipitation	29.3 mm (1.2 in)	36 of 100 (Notable)
Northdale	United States	Record snow depth	20.3 cm (8.0 in)	36 of 100 (Notable)
Brooksville Chin Hill	United States	Record low maximum temperature	20.0 C (68.0 F)	36 of 100 (Notable)
Tescott	United States	Record daily precipitation	48.3 mm (1.9 in)	36 of 100 (Notable)
Milan Exp STN	United States	Record low maximum temperature	11.7 C (53.1 F)	36 of 100 (Notable)
Gudgenby	Australia	Record daily precipitation	32.2 mm (1.3 in)	35 of 100 (Notable)
Bowning (Wanganui)	Australia	Record daily precipitation	35.1 mm (1.4 in)	35 of 100 (Notable)
Sedgwick	Australia	Record daily precipitation	29.8 mm (1.2 in)	35 of 100 (Notable)
Leslie Manor (Boolarra)	Australia	Record daily precipitation	30.0 mm (1.2 in)	35 of 100 (Notable)
Grangesberg	Sweden	Record daily precipitation	25.3 mm (1.0 in)	35 of 100 (Notable)
Essex Fells Svc Bldg	United States	Record daily precipitation	88.6 mm (3.5 in)	35 of 100 (Notable)
Waynesville 1 E	United States	Record low maximum temperature	7.2 C (45.0 F)	35 of 100 (Notable)
Conshohocken	United States	Record daily precipitation	52.8 mm (2.1 in)	35 of 100 (Notable)
Winnsboro	United States	Record low minimum temperature	-1.1 C (30.0 F)	35 of 100 (Notable)
Brownsville	United States	Record low maximum temperature	11.7 C (53.1 F)	35 of 100 (Notable)
Waynesboro	United States	Record low maximum temperature	8.9 C (48.0 F)	35 of 100 (Notable)

Counts by Type and Timescale

997 records

Records set or tied on 17 April 1986 by type: Highest daily maximum 47, Lowest daily maximum 188, Highest daily minimum 86, Lowest daily minimum 101, Heaviest daily rainfall 499, Heaviest daily snowfall 40, Deepest snow cover 36.

Records on 17 April 1986 by type
Record type	Records
Highest daily maximum	47
Lowest daily maximum	188
Highest daily minimum	86
Lowest daily minimum	101
Heaviest daily rainfall	499
Heaviest daily snowfall	40
Deepest snow cover	36

Records on 17 April 1986 by timescale: all-time 3, monthly 20, daily 974.

How Much Records Were Beaten By

861 broken records

Margins by which the 861 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 229.0. Ties are not counted.

Top 20 by Significance

17 April 1986

Top 20 records on 17 April 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1986	Tot-Ma, RU	daily rain	26.6 mm (1.0 in)	14.7 mm (0.6 in)	86 years	76 of 100 (Major)
17 April 1986	Willaura (Main Street), AU	daily rain	42.0 mm (1.7 in)	31.3 mm (1.2 in)	64 years	67 of 100 (Major)
17 April 1986	Wickliffe, AU	daily rain	37.2 mm (1.5 in)	25.3 mm (1.0 in)	52 years	61 of 100 (Major)
17 April 1986	Velsk, RU	monthly rain	41.7 mm (1.6 in)	20.0 mm (0.8 in)	19 years	60 of 100 (Major)
17 April 1986	Jamestown State Hosp, US	daily snow depth	20.3 cm (8.0 in)	20.3 cm (8.0 in)	85 years	55 of 100 (Notable)
17 April 1986	Hammonton 1 NE, US	daily rain	52.1 mm (2.1 in)	26.7 mm (1.1 in)	76 years	54 of 100 (Notable)
17 April 1986	Willaura (Yarram Park), AU	daily rain	41.0 mm (1.6 in)	17.9 mm (0.7 in)	64 years	52 of 100 (Notable)
17 April 1986	Larned, US	daily rain	45.7 mm (1.8 in)	32.0 mm (1.3 in)	45 years	51 of 100 (Notable)
17 April 1986	Morris Plains 1 W, US	daily rain	70.6 mm (2.8 in)	46.5 mm (1.8 in)	32 years	51 of 100 (Notable)
17 April 1986	Tenerife/Los Rodeos, ES	daily rain	40.1 mm (1.6 in)	30.1 mm (1.2 in)	33 years	50 of 100 (Notable)
17 April 1986	Belconnen (Weetangerra), AU	daily rain	29.0 mm (1.1 in)	7.9 mm (0.31 in)	96 years	46 of 100 (Notable)
17 April 1986	Heathcote, AU	daily rain	40.0 mm (1.6 in)	24.0 mm (0.9 in)	33 years	46 of 100 (Notable)
17 April 1986	Oak Ridge Rsvr, US	daily rain	70.6 mm (2.8 in)	39.1 mm (1.5 in)	32 years	46 of 100 (Notable)
17 April 1986	Colbinabbin, AU	daily rain	30.6 mm (1.2 in)	18.9 mm (0.7 in)	33 years	44 of 100 (Notable)
17 April 1986	Redesdale, AU	daily rain	42.0 mm (1.7 in)	24.5 mm (1.0 in)	33 years	44 of 100 (Notable)
17 April 1986	Wombat (Tumbleton), AU	daily rain	31.4 mm (1.2 in)	15.1 mm (0.6 in)	72 years	43 of 100 (Notable)
17 April 1986	Murrumburrah Old Post Office, AU	daily rain	36.0 mm (1.4 in)	12.6 mm (0.5 in)	72 years	42 of 100 (Notable)
17 April 1986	Lake Bolac (Post Office), AU	daily rain	25.8 mm (1.0 in)	18.7 mm (0.7 in)	33 years	42 of 100 (Notable)
17 April 1986	Carrolltown 1 NNE, US	daily snowfall	12.7 cm (5.0 in)	10.2 cm (4.0 in)	29 years	42 of 100 (Notable)
17 April 1986	Claussville, US	daily rain	50.8 mm (2.0 in)	31.7 mm (1.2 in)	32 years	42 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 1986

Records set or tied on this calendar date in each year from 1799 to 1986. 1986 had 997 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 1986-04-17: 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 50	837
50 to 100	12
100 to 150	8
150 to 200	2
200 to 250	2