Weather Records on 18 April 1966

776 weather records were set or tied worldwide on 18 April 1966. Highest significance: Haskell, US.

Key Facts for 18 April 1966

On 18 April 1966, 776 weather records were set or tied at long-record stations worldwide.
61 were record highs and 381 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 766 daily.
Haskell set a daily record precipitation of 86.4 mm (3.4 in) on 18 April 1966.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 465 records.

Record Map

776 stations

776 station records on 18 April 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Haskell	United States	Record daily precipitation	86.4 mm (3.4 in)	62 of 100 (Major)
Gladwin	United States	Record daily precipitation	49.8 mm (2.0 in)	55 of 100 (Notable)
Jonkoping	Sweden	Record low minimum temperature	-13.4 C (7.9 F)	54 of 100 (Notable)
Bedford	United States	Record daily precipitation	47.8 mm (1.9 in)	52 of 100 (Notable)
Red Lodge	United States	Record daily snowfall	55.9 cm (22.0 in)	51 of 100 (Notable)
Kasargod	India	Record daily precipitation	115.0 mm (4.5 in)	50 of 100 (Notable)
Karlstad	Sweden	Record low minimum temperature	-11.2 C (11.8 F)	49 of 100 (Notable)
Smith 1 N	United States	Record daily snowfall	12.7 cm (5.0 in)	49 of 100 (Notable)
Spencer 10 NE	United States	Record daily snowfall	20.3 cm (8.0 in)	48 of 100 (Notable)
Dubois	United States	Record daily precipitation	29.2 mm (1.1 in)	47 of 100 (Notable)
Matagorda #2	United States	Record daily precipitation	118.6 mm (4.7 in)	45 of 100 (Notable)
Falun	Sweden	Record low minimum temperature	-15.8 C (3.6 F)	44 of 100 (Notable)
Auburn 5 ESE	United States	Record daily precipitation	35.8 mm (1.4 in)	44 of 100 (Notable)
Dilley	United States	Record daily precipitation	38.4 mm (1.5 in)	43 of 100 (Notable)
Leo 6 SW	United States	Record daily snowfall	30.5 cm (12.0 in)	43 of 100 (Notable)
Faith	United States	Record daily snowfall	11.4 cm (4.5 in)	42 of 100 (Notable)
Tranebjerg	Denmark	Record low maximum temperature	0.2 C (32.4 F)	41 of 100 (Notable)
Quilon Pwd	India	Record daily precipitation	106.7 mm (4.2 in)	41 of 100 (Notable)
Orebro	Sweden	Record low minimum temperature	-10.5 C (13.1 F)	41 of 100 (Notable)
Armagh	United Kingdom	Record low maximum temperature	4.6 C (40.3 F)	41 of 100 (Notable)
Corsicana	United States	Record daily precipitation	45.2 mm (1.8 in)	41 of 100 (Notable)
Gatesville	United States	Record daily precipitation	46.2 mm (1.8 in)	41 of 100 (Notable)
Riverton	United States	Record daily snowfall	17.8 cm (7.0 in)	41 of 100 (Notable)
Harnosand	Sweden	Record low minimum temperature	-14.8 C (5.4 F)	40 of 100 (Notable)
Osceola	United States	Record daily precipitation	55.4 mm (2.2 in)	40 of 100 (Notable)
Gillette 3SE	United States	Record daily snowfall	15.2 cm (6.0 in)	40 of 100 (Notable)
Vanersborg	Sweden	Record low minimum temperature	-9.8 C (14.4 F)	39 of 100 (Notable)
Hailey 3 NNW	United States	Record daily snowfall	22.9 cm (9.0 in)	39 of 100 (Notable)
Vestervig	Denmark	Record low minimum temperature	-6.2 C (20.8 F)	38 of 100 (Notable)
Koebenhavn: Landbohojskolen-1	Denmark	Record low maximum temperature	0.6 C (33.1 F)	38 of 100 (Notable)
Uppsala_Aut	Sweden	Record low minimum temperature	-11.4 C (11.5 F)	38 of 100 (Notable)
Bjuraker	Sweden	Record low minimum temperature	-18.0 C (-0.4 F)	38 of 100 (Notable)
Sveg	Sweden	Record snow depth	94.0 cm (37.0 in)	38 of 100 (Notable)
Forse	Sweden	Record low minimum temperature	-16.6 C (2.1 F)	38 of 100 (Notable)
Orman Dam	United States	Record daily snowfall	15.2 cm (6.0 in)	38 of 100 (Notable)
Mexia	United States	Record daily precipitation	145.0 mm (5.7 in)	38 of 100 (Notable)
Palestine 2 NE	United States	Record daily precipitation	48.5 mm (1.9 in)	38 of 100 (Notable)
Columbus Junction	United States	Record daily precipitation	48.8 mm (1.9 in)	37 of 100 (Notable)
Edna 3 SW	United States	Record daily precipitation	57.2 mm (2.3 in)	37 of 100 (Notable)
Flahult	Sweden	Record low minimum temperature	-17.7 C (0.1 F)	36 of 100 (Notable)
Skara 1	Sweden	Record low minimum temperature	-10.4 C (13.3 F)	36 of 100 (Notable)
Pitea	Sweden	Record low minimum temperature	-16.9 C (1.6 F)	36 of 100 (Notable)
Danevang 1 W	United States	Record daily precipitation	74.4 mm (2.9 in)	36 of 100 (Notable)
Vasteras-Hasslo	Sweden	Record low minimum temperature	-10.6 C (12.9 F)	35 of 100 (Notable)
Jokkmokk	Sweden	Record low maximum temperature	-5.5 C (22.1 F)	35 of 100 (Notable)
Stockholm	Sweden	Record low minimum temperature	-9.0 C (15.8 F)	35 of 100 (Notable)
Eureka	United States	Record daily snowfall	5.1 cm (2.0 in)	35 of 100 (Notable)
Yellowstone Park Mammoth	United States	Record low maximum temperature	-3.9 C (25.0 F)	35 of 100 (Notable)
Nordby (Fano)	Denmark	Record low maximum temperature	2.9 C (37.2 F)	34 of 100 (Routine)
Sandvig	Denmark	Record low maximum temperature	1.0 C (33.8 F)	34 of 100 (Routine)
Visby_Flygplats	Sweden	Record low minimum temperature	-3.8 C (25.2 F)	34 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record low minimum temperature	-8.3 C (17.1 F)	34 of 100 (Routine)
Sveg	Sweden	Record low minimum temperature	-19.6 C (-3.3 F)	34 of 100 (Routine)
Iowa City	United States	Record daily precipitation	32.0 mm (1.3 in)	34 of 100 (Routine)
Ennis	United States	Record daily snowfall	7.6 cm (3.0 in)	34 of 100 (Routine)
Grapevine Dam	United States	Record daily precipitation	37.3 mm (1.5 in)	34 of 100 (Routine)
Bjuraker	Sweden	Record low maximum temperature	-1.8 C (28.8 F)	33 of 100 (Routine)
Junsele	Sweden	Record low minimum temperature	-16.5 C (2.3 F)	33 of 100 (Routine)
Belle Fourche	United States	Record daily snowfall	11.4 cm (4.5 in)	33 of 100 (Routine)
Galway	Ireland	Record low maximum temperature	6.0 C (42.8 F)	32 of 100 (Routine)

Counts by Type and Timescale

776 records

Records set or tied on 18 April 1966 by type: Highest daily maximum 12, Lowest daily maximum 255, Highest daily minimum 49, Lowest daily minimum 126, Heaviest daily rainfall 236, Heaviest daily snowfall 71, Deepest snow cover 27.

Records on 18 April 1966 by type
Record type	Records
Highest daily maximum	12
Lowest daily maximum	255
Highest daily minimum	49
Lowest daily minimum	126
Heaviest daily rainfall	236
Heaviest daily snowfall	71
Deepest snow cover	27

Records on 18 April 1966 by timescale: all-time 0, monthly 10, daily 766.

How Much Records Were Beaten By

659 broken records

Margins by which the 659 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 368.0. Ties are not counted.

Top 20 by Significance

18 April 1966

Top 20 records on 18 April 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1966	Haskell, US	daily rain	86.4 mm (3.4 in)	65.3 mm (2.6 in)	51 years	62 of 100 (Major)
18 April 1966	Gladwin, US	daily rain	49.8 mm (2.0 in)	32.0 mm (1.3 in)	53 years	55 of 100 (Notable)
18 April 1966	Jonkoping, SE	daily low min	-13.4 C (7.9 F)	6.9 C (12.4 F)	81 years	54 of 100 (Notable)
18 April 1966	Bedford, US	daily rain	47.8 mm (1.9 in)	32.3 mm (1.3 in)	45 years	52 of 100 (Notable)
18 April 1966	Red Lodge, US	daily snowfall	55.9 cm (22.0 in)	36.8 cm (14.5 in)	39 years	51 of 100 (Notable)
18 April 1966	Kasargod, IN	daily rain	115.0 mm (4.5 in)	74.6 mm (2.9 in)	28 years	50 of 100 (Notable)
18 April 1966	Karlstad, SE	daily low min	-11.2 C (11.8 F)	8.2 C (14.8 F)	63 years	49 of 100 (Notable)
18 April 1966	Smith 1 N, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	56 years	49 of 100 (Notable)
18 April 1966	Spencer 10 NE, US	daily snowfall	20.3 cm (8.0 in)	20.3 cm (8.0 in)	48 years	48 of 100 (Notable)
18 April 1966	Dubois, US	daily rain	29.2 mm (1.1 in)	15.2 mm (0.6 in)	53 years	47 of 100 (Notable)
18 April 1966	Matagorda #2, US	daily rain	118.6 mm (4.7 in)	71.6 mm (2.8 in)	48 years	45 of 100 (Notable)
18 April 1966	Falun, SE	daily low min	-15.8 C (3.6 F)	7.8 C (14.0 F)	64 years	44 of 100 (Notable)
18 April 1966	Auburn 5 ESE, US	daily rain	35.8 mm (1.4 in)	17.5 mm (0.7 in)	67 years	44 of 100 (Notable)
18 April 1966	Dilley, US	daily rain	38.4 mm (1.5 in)	33.3 mm (1.3 in)	51 years	43 of 100 (Notable)
18 April 1966	Leo 6 SW, US	daily snowfall	30.5 cm (12.0 in)	28.0 cm (11.0 in)	3 years	43 of 100 (Notable)
18 April 1966	Faith, US	daily snowfall	11.4 cm (4.5 in)	11.4 cm (4.5 in)	52 years	42 of 100 (Notable)
18 April 1966	Tranebjerg, DK	daily low max	0.2 C (32.4 F)	3.1 C (5.6 F)	81 years	41 of 100 (Notable)
18 April 1966	Quilon Pwd, IN	daily rain	106.7 mm (4.2 in)	58.4 mm (2.3 in)	16 years	41 of 100 (Notable)
18 April 1966	Orebro, SE	daily low min	-10.5 C (13.1 F)	3.0 C (5.4 F)	81 years	41 of 100 (Notable)
18 April 1966	Armagh, GB	daily low max	4.6 C (40.3 F)	0.5 C (0.9 F)	116 years	41 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 1966

Records set or tied on this calendar date in each year from 1793 to 1966. 1966 had 776 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1966-04-18: 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 2026-10-17 (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	605
50 to 100	38
100 to 150	7
150 to 200	3
200 to 250	2
250 to 300	1
300 to 350	2
350 to 400	1