Weather Records on 17 April 1964

766 weather records were set or tied worldwide on 17 April 1964. Highest significance: Grindstone Island, CA.

Key Facts for 17 April 1964

On 17 April 1964, 766 weather records were set or tied at long-record stations worldwide.
421 were record highs and 251 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 13 monthly and 753 daily.
Grindstone Island set a monthly record daily snowfall of 30.7 cm (12.1 in) on 17 April 1964.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 451 records.

Record Map

766 stations

766 station records on 17 April 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Grindstone Island	Canada	Record daily snowfall	30.7 cm (12.1 in)	66 of 100 (Major)
Grindstone Island	Canada	Record daily precipitation	30.7 mm (1.2 in)	50 of 100 (Notable)
Bettiah	India	Record daily precipitation	43.0 mm (1.7 in)	48 of 100 (Notable)
Krishnarajpet	India	Record daily precipitation	62.2 mm (2.4 in)	46 of 100 (Notable)
Geary	United States	Record daily precipitation	46.5 mm (1.8 in)	43 of 100 (Notable)
Uccle	Belgium	Record high minimum temperature	13.3 C (55.9 F)	41 of 100 (Notable)
Oxford	United Kingdom	Record high minimum temperature	10.0 C (50.0 F)	41 of 100 (Notable)
Basantpur	India	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Mohiuddin Nagar	India	Record daily precipitation	28.0 mm (1.1 in)	39 of 100 (Notable)
Richland	United States	Record low minimum temperature	-9.4 C (15.1 F)	38 of 100 (Notable)
Atlantic City Marina	United States	Record high minimum temperature	13.9 C (57.0 F)	37 of 100 (Notable)
Talkeetna AP	United States	Record daily snowfall	37.1 cm (14.6 in)	37 of 100 (Notable)
Cambridge	United States	Record low minimum temperature	-9.4 C (15.1 F)	36 of 100 (Notable)
Yellowstone Park Mammoth	United States	Record low minimum temperature	-16.1 C (3.0 F)	36 of 100 (Notable)
Collingwood	Canada	Record high maximum temperature	28.9 C (84.0 F)	35 of 100 (Notable)
Grangeville	United States	Record low minimum temperature	-7.2 C (19.0 F)	35 of 100 (Notable)
Weatherford	United States	Record daily precipitation	55.9 mm (2.2 in)	35 of 100 (Notable)
Ashland	United States	Record low minimum temperature	-5.6 C (21.9 F)	35 of 100 (Notable)
Coupeville 1 S	United States	Record low minimum temperature	-2.8 C (27.0 F)	35 of 100 (Notable)
Viroqua	United States	Record high minimum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Samastipur	India	Record daily precipitation	34.5 mm (1.4 in)	34 of 100 (Routine)
Cottonwood	United States	Record low minimum temperature	-8.9 C (16.0 F)	34 of 100 (Routine)
Port Dover	Canada	Record high maximum temperature	25.0 C (77.0 F)	33 of 100 (Routine)
Spokane Intl AP	United States	Record low minimum temperature	-4.4 C (24.1 F)	33 of 100 (Routine)
Dhamdaha(West)	India	Record daily precipitation	33.8 mm (1.3 in)	32 of 100 (Routine)
Upper Lake 2 N	United States	Record low minimum temperature	-2.2 C (28.0 F)	32 of 100 (Routine)
Payette	United States	Record low minimum temperature	-7.8 C (18.0 F)	32 of 100 (Routine)
Wallowa	United States	Record low minimum temperature	-8.9 C (16.0 F)	32 of 100 (Routine)
Lacrosse	United States	Record low minimum temperature	-9.4 C (15.1 F)	32 of 100 (Routine)
Pomeroy	United States	Record low minimum temperature	-7.2 C (19.0 F)	32 of 100 (Routine)
Lake City Exp Farm	United States	Record high minimum temperature	14.4 C (57.9 F)	31 of 100 (Routine)
Forest Grove	United States	Record low minimum temperature	-3.9 C (25.0 F)	31 of 100 (Routine)
Heppner	United States	Record low minimum temperature	-6.1 C (21.0 F)	31 of 100 (Routine)
McGregor	United States	Record daily precipitation	59.7 mm (2.4 in)	31 of 100 (Routine)
Lake Keechelus	United States	Record low minimum temperature	-11.1 C (12.0 F)	31 of 100 (Routine)
Salem AP (McNary Field)	United States	Record low minimum temperature	-2.8 C (27.0 F)	31 of 100 (Routine)
Kamloops	Canada	Record low minimum temperature	-5.6 C (21.9 F)	30 of 100 (Routine)
Grayling	United States	Record high minimum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Augusta	United States	Record low minimum temperature	-14.4 C (6.1 F)	30 of 100 (Routine)
Virginia City	United States	Record low minimum temperature	-12.2 C (10.0 F)	30 of 100 (Routine)
Alfred	United States	Record high maximum temperature	31.1 C (88.0 F)	30 of 100 (Routine)
Olga 2 SE	United States	Record low minimum temperature	0.0 C (32.0 F)	30 of 100 (Routine)
Rosalia	United States	Record low minimum temperature	-3.9 C (25.0 F)	30 of 100 (Routine)
Vestervig	Denmark	Record high maximum temperature	22.4 C (72.3 F)	29 of 100 (Routine)
Jonkoping	Sweden	Record high maximum temperature	20.5 C (68.9 F)	29 of 100 (Routine)
Hood Rvr Exp STN	United States	Record low minimum temperature	-3.9 C (25.0 F)	29 of 100 (Routine)
Huntington	United States	Record low minimum temperature	-7.8 C (18.0 F)	29 of 100 (Routine)
Umatilla	United States	Record low minimum temperature	-2.8 C (27.0 F)	29 of 100 (Routine)
Laurier	United States	Record low minimum temperature	-8.9 C (16.0 F)	29 of 100 (Routine)
Stevens Pt	United States	Record high minimum temperature	16.7 C (62.1 F)	29 of 100 (Routine)
Western Creek	Australia	Record daily precipitation	35.8 mm (1.4 in)	28 of 100 (Routine)
Blackfoot Fire Dept	United States	Record low minimum temperature	-7.8 C (18.0 F)	28 of 100 (Routine)
Adrian 2 NNE	United States	Record high minimum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Hastings	United States	Record high maximum temperature	28.3 C (82.9 F)	28 of 100 (Routine)
Saint Johns	United States	Record high maximum temperature	28.3 C (82.9 F)	28 of 100 (Routine)
Bozeman Montana State UNIV	United States	Record low minimum temperature	-11.7 C (10.9 F)	28 of 100 (Routine)
Fairmont	United States	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)
W Pt	United States	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)
Cove 1 E	United States	Record low minimum temperature	-6.7 C (19.9 F)	28 of 100 (Routine)
Mc Minnville	United States	Record low minimum temperature	-3.3 C (26.1 F)	28 of 100 (Routine)

Counts by Type and Timescale

766 records

Records set or tied on 17 April 1964 by type: Highest daily maximum 268, Lowest daily maximum 30, Highest daily minimum 153, Lowest daily minimum 221, Heaviest daily rainfall 86, Heaviest daily snowfall 7, Deepest snow cover 1.

Records on 17 April 1964 by type
Record type	Records
Highest daily maximum	268
Lowest daily maximum	30
Highest daily minimum	153
Lowest daily minimum	221
Heaviest daily rainfall	86
Heaviest daily snowfall	7
Deepest snow cover	1

Records on 17 April 1964 by timescale: all-time 0, monthly 13, daily 753.

How Much Records Were Beaten By

606 broken records

Margins by which the 606 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 219.0. Ties are not counted.

Top 20 by Significance

17 April 1964

Top 20 records on 17 April 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1964	Grindstone Island, CA	monthly snowfall	30.7 cm (12.1 in)	10.4 cm (4.1 in)	73 years	66 of 100 (Major)
17 April 1964	Grindstone Island, CA	daily rain	30.7 mm (1.2 in)	19.3 mm (0.8 in)	21 years	50 of 100 (Notable)
17 April 1964	Bettiah, IN	daily rain	43.0 mm (1.7 in)	31.6 mm (1.2 in)	39 years	48 of 100 (Notable)
17 April 1964	Krishnarajpet, IN	daily rain	62.2 mm (2.4 in)	35.5 mm (1.4 in)	41 years	46 of 100 (Notable)
17 April 1964	Geary, US	daily rain	46.5 mm (1.8 in)	38.4 mm (1.5 in)	24 years	43 of 100 (Notable)
17 April 1964	Uccle, BE	daily high min	13.3 C (55.9 F)	0.6 C (1.1 F)	105 years	41 of 100 (Notable)
17 April 1964	Oxford, GB	daily high min	10.0 C (50.0 F)	0.6 C (1.1 F)	112 years	41 of 100 (Notable)
17 April 1964	Basantpur, IN	daily rain	33.0 mm (1.3 in)	31.7 mm (1.2 in)	21 years	40 of 100 (Notable)
17 April 1964	Mohiuddin Nagar, IN	daily rain	28.0 mm (1.1 in)	28.0 mm (1.1 in)	48 years	39 of 100 (Notable)
17 April 1964	Richland, US	daily low min	-9.4 C (15.1 F)	5.0 C (9.0 F)	63 years	38 of 100 (Notable)
17 April 1964	Atlantic City Marina, US	daily high min	13.9 C (57.0 F)	2.8 C (5.0 F)	67 years	37 of 100 (Notable)
17 April 1964	Talkeetna AP, US	daily snowfall	37.1 cm (14.6 in)	21.9 cm (8.6 in)	42 years	37 of 100 (Notable)
17 April 1964	Cambridge, US	daily low min	-9.4 C (15.1 F)	5.5 C (9.9 F)	47 years	36 of 100 (Notable)
17 April 1964	Yellowstone Park Mammoth, US	daily low min	-16.1 C (3.0 F)	3.9 C (7.0 F)	67 years	36 of 100 (Notable)
17 April 1964	Collingwood, CA	daily high max	28.9 C (84.0 F)	5.0 C (9.0 F)	67 years	35 of 100 (Notable)
17 April 1964	Grangeville, US	daily low min	-7.2 C (19.0 F)	2.8 C (5.0 F)	67 years	35 of 100 (Notable)
17 April 1964	Weatherford, US	daily rain	55.9 mm (2.2 in)	30.8 mm (1.2 in)	22 years	35 of 100 (Notable)
17 April 1964	Ashland, US	daily low min	-5.6 C (21.9 F)	2.8 C (5.0 F)	69 years	35 of 100 (Notable)
17 April 1964	Coupeville 1 S, US	daily low min	-2.8 C (27.0 F)	4.5 C (8.1 F)	35 years	35 of 100 (Notable)
17 April 1964	Viroqua, US	daily high min	17.2 C (63.0 F)	4.4 C (7.9 F)	67 years	35 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 1964

Records set or tied on this calendar date in each year from 1799 to 1964. 1964 had 766 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 1964-04-17: 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	602
50 to 100	1
100 to 150	1
150 to 200	1
200 to 250	1