Weather Records on 12 April 1964

363 weather records were set or tied worldwide on 12 April 1964. Highest significance: Morris, CA.

Key Facts for 12 April 1964

On 12 April 1964, 363 weather records were set or tied at long-record stations worldwide.
98 were record highs and 48 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 360 daily.
Morris set a daily record precipitation of 33.5 mm (1.3 in) on 12 April 1964.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 502 records.

Record Map

363 stations

363 station records on 12 April 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 April 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Morris	Canada	Record daily precipitation	33.5 mm (1.3 in)	59 of 100 (Notable)
Currais Novos	Brazil	Record daily precipitation	76.0 mm (3.0 in)	53 of 100 (Notable)
Gothenburg	United States	Record daily snowfall	12.7 cm (5.0 in)	47 of 100 (Notable)
Flagstaff (Tnk)	South Africa	Record daily precipitation	92.0 mm (3.6 in)	44 of 100 (Notable)
Itapipoca	Brazil	Record daily precipitation	109.0 mm (4.3 in)	43 of 100 (Notable)
Olho Dagua	Brazil	Record daily precipitation	100.6 mm (4.0 in)	40 of 100 (Notable)
Palermo	Italy	Record daily precipitation	44.0 mm (1.7 in)	40 of 100 (Notable)
Florania	Brazil	Record daily precipitation	59.8 mm (2.4 in)	36 of 100 (Notable)
Grafton	United States	Record daily precipitation	25.1 mm (1.0 in)	36 of 100 (Notable)
Olivedos (Sao Francisco)	Brazil	Record daily precipitation	59.1 mm (2.3 in)	35 of 100 (Notable)
Surgut	Russia	Record low minimum temperature	-33.1 C (-27.6 F)	34 of 100 (Routine)
Alliance 1WNW	United States	Record daily snowfall	7.6 cm (3.0 in)	34 of 100 (Routine)
Pedro II	Brazil	Record daily precipitation	76.1 mm (3.0 in)	33 of 100 (Routine)
Aracati	Brazil	Record daily precipitation	68.3 mm (2.7 in)	33 of 100 (Routine)
Durham	Canada	Record high minimum temperature	6.1 C (43.0 F)	33 of 100 (Routine)
Healdton 3 E	United States	Record high maximum temperature	33.3 C (91.9 F)	33 of 100 (Routine)
Barrinha	Brazil	Record daily precipitation	28.5 mm (1.1 in)	32 of 100 (Routine)
Petropavlovsk	Kazakhstan	Record low minimum temperature	-21.3 C (-6.3 F)	32 of 100 (Routine)
Independencia	Brazil	Record daily precipitation	50.0 mm (2.0 in)	31 of 100 (Routine)
Castelo Do Piaui (Marvao)	Brazil	Record daily precipitation	84.0 mm (3.3 in)	30 of 100 (Routine)
Barabinsk	Russia	Record low minimum temperature	-22.6 C (-8.7 F)	30 of 100 (Routine)
Kennewick	United States	Record high minimum temperature	12.8 C (55.0 F)	30 of 100 (Routine)
Kooskia	United States	Record daily precipitation	32.0 mm (1.3 in)	29 of 100 (Routine)
Alta 1 NNW	United States	Record daily snowfall	15.2 cm (6.0 in)	29 of 100 (Routine)
Purcell 2 SW	United States	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)
Oshkosh	United States	Record high minimum temperature	10.0 C (50.0 F)	28 of 100 (Routine)
Nova Russas	Brazil	Record daily precipitation	52.2 mm (2.1 in)	27 of 100 (Routine)
Parau	Brazil	Record daily precipitation	53.5 mm (2.1 in)	27 of 100 (Routine)
Serra Negra Do Norte	Brazil	Record daily precipitation	78.0 mm (3.1 in)	27 of 100 (Routine)
Hanty-Mansijsk	Russia	Record low minimum temperature	-25.9 C (-14.6 F)	27 of 100 (Routine)
Ballinger 2 NW	United States	Record high minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Batalha	Brazil	Record daily precipitation	78.9 mm (3.1 in)	26 of 100 (Routine)
Sao Benedito	Brazil	Record daily precipitation	128.4 mm (5.1 in)	26 of 100 (Routine)
Limoeiro Do Norte	Brazil	Record daily precipitation	37.3 mm (1.5 in)	26 of 100 (Routine)
Japaratuba	Brazil	Record daily precipitation	42.8 mm (1.7 in)	26 of 100 (Routine)
Coquitlam Lake	Canada	Record daily snowfall	5.1 cm (2.0 in)	26 of 100 (Routine)
Hamiota	Canada	Record daily precipitation	30.5 mm (1.2 in)	26 of 100 (Routine)
Tezpur	India	Record daily precipitation	61.0 mm (2.4 in)	26 of 100 (Routine)
Audubon	United States	Record daily precipitation	29.2 mm (1.1 in)	26 of 100 (Routine)
Lake Yellowstone	United States	Record daily snowfall	10.2 cm (4.0 in)	26 of 100 (Routine)
San Angelo	United States	Record high minimum temperature	18.9 C (66.0 F)	25 of 100 (Routine)
Atbasar	Kazakhstan	Record low minimum temperature	-20.0 C (-4.0 F)	24 of 100 (Routine)
Newberry-Luce Co Rd Commission	United States	Record high maximum temperature	18.9 C (66.0 F)	24 of 100 (Routine)
El Reno 1 N	United States	Record high maximum temperature	32.2 C (90.0 F)	24 of 100 (Routine)
Emerson	Canada	Record daily snowfall	7.6 cm (3.0 in)	23 of 100 (Routine)
Eagle Harbor	United States	Record high minimum temperature	9.4 C (48.9 F)	23 of 100 (Routine)
Okolona	United States	Record daily precipitation	60.5 mm (2.4 in)	23 of 100 (Routine)
Acude Velame	Brazil	Record daily precipitation	63.0 mm (2.5 in)	22 of 100 (Routine)
Ville Marie	Canada	Record high minimum temperature	6.1 C (43.0 F)	22 of 100 (Routine)
Inukjuak Ua	Canada	Record low maximum temperature	-21.1 C (-6.0 F)	22 of 100 (Routine)
Manassa	United States	Record high minimum temperature	7.8 C (46.0 F)	22 of 100 (Routine)
Hinckley	United States	Record high minimum temperature	7.8 C (46.0 F)	22 of 100 (Routine)
Amarante	Brazil	Record daily precipitation	77.5 mm (3.1 in)	21 of 100 (Routine)
Boa Viagem	Brazil	Record daily precipitation	86.8 mm (3.4 in)	21 of 100 (Routine)
Uruque	Brazil	Record daily precipitation	61.0 mm (2.4 in)	21 of 100 (Routine)
Indian Bay	Canada	Record daily precipitation	38.1 mm (1.5 in)	21 of 100 (Routine)
La Pocatiere Cda	Canada	Record high minimum temperature	4.4 C (39.9 F)	21 of 100 (Routine)
Willow City	United States	Record daily precipitation	12.2 mm (0.5 in)	20 of 100 (Routine)
Savage	United States	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Emerson	Canada	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)

Counts by Type and Timescale

363 records

Records set or tied on 12 April 1964 by type: Highest daily maximum 27, Lowest daily maximum 18, Highest daily minimum 71, Lowest daily minimum 30, Heaviest daily rainfall 190, Heaviest daily snowfall 25, Deepest snow cover 2.

Records on 12 April 1964 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	18
Highest daily minimum	71
Lowest daily minimum	30
Heaviest daily rainfall	190
Heaviest daily snowfall	25
Deepest snow cover	2

Records on 12 April 1964 by timescale: all-time 0, monthly 3, daily 360.

How Much Records Were Beaten By

300 broken records

Margins by which the 300 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

12 April 1964

Top 20 records on 12 April 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 April 1964	Morris, CA	daily rain	33.5 mm (1.3 in)	20.8 mm (0.8 in)	71 years	59 of 100 (Notable)
12 April 1964	Currais Novos, BR	daily rain	76.0 mm (3.0 in)	56.0 mm (2.2 in)	27 years	53 of 100 (Notable)
12 April 1964	Gothenburg, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	68 years	47 of 100 (Notable)
12 April 1964	Flagstaff (Tnk), ZA	monthly rain	92.0 mm (3.6 in)	27.0 mm (1.1 in)	3 years	44 of 100 (Notable)
12 April 1964	Itapipoca, BR	monthly rain	109.0 mm (4.3 in)	20.0 mm (0.8 in)	52 years	43 of 100 (Notable)
12 April 1964	Olho Dagua, BR	daily rain	100.6 mm (4.0 in)	69.8 mm (2.7 in)	22 years	40 of 100 (Notable)
12 April 1964	Palermo, IT	daily rain	44.0 mm (1.7 in)	18.6 mm (0.7 in)	26 years	40 of 100 (Notable)
12 April 1964	Florania, BR	daily rain	59.8 mm (2.4 in)	32.8 mm (1.3 in)	31 years	36 of 100 (Notable)
12 April 1964	Grafton, US	daily rain	25.1 mm (1.0 in)	9.9 mm (0.39 in)	58 years	36 of 100 (Notable)
12 April 1964	Olivedos (Sao Francisco), BR	daily rain	59.1 mm (2.3 in)	43.1 mm (1.7 in)	26 years	35 of 100 (Notable)
12 April 1964	Surgut, RU	daily low min	-33.1 C (-27.6 F)	6.0 C (10.8 F)	69 years	34 of 100 (Routine)
12 April 1964	Alliance 1WNW, US	daily snowfall	7.6 cm (3.0 in)	5.1 cm (2.0 in)	67 years	34 of 100 (Routine)
12 April 1964	Pedro II, BR	daily rain	76.1 mm (3.0 in)	36.6 mm (1.4 in)	29 years	33 of 100 (Routine)
12 April 1964	Aracati, BR	daily rain	68.3 mm (2.7 in)	30.3 mm (1.2 in)	41 years	33 of 100 (Routine)
12 April 1964	Durham, CA	daily high min	6.1 C (43.0 F)	1.7 C (3.1 F)	73 years	33 of 100 (Routine)
12 April 1964	Healdton 3 E, US	daily high max	33.3 C (91.9 F)	3.3 C (5.9 F)	68 years	33 of 100 (Routine)
12 April 1964	Barrinha, BR	daily rain	28.5 mm (1.1 in)	28.5 mm (1.1 in)	30 years	32 of 100 (Routine)
12 April 1964	Petropavlovsk, KZ	daily low min	-21.3 C (-6.3 F)	4.9 C (8.8 F)	60 years	32 of 100 (Routine)
12 April 1964	Independencia, BR	daily rain	50.0 mm (2.0 in)	18.7 mm (0.7 in)	44 years	31 of 100 (Routine)
12 April 1964	Castelo Do Piaui (Marvao), BR	daily rain	84.0 mm (3.3 in)	20.6 mm (0.8 in)	47 years	30 of 100 (Routine)

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 1964

Records set or tied on this calendar date in each year from 1793 to 1964. 1964 had 363 records.

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

Records on 04-12 in each year
Year	Records
1793	1
1805	1
1810	1
1812	2
1817	2
1826	1
1831	1
1845	1
1850	1
1854	1
1865	2
1866	2
1868	4
1869	5
1871	1
1873	1
1874	5
1876	2
1877	1
1878	1
1879	4
1881	1
1882	1
1885	2
1889	4
1890	10
1891	3
1892	2
1893	4
1894	1
1895	1
1896	1
1897	4
1898	4
1899	5
1900	6
1901	5
1902	3
1903	10
1904	11
1905	19
1906	24
1907	5
1908	10
1909	16
1910	15
1911	26
1912	48
1913	88
1914	41
1915	125
1916	37
1917	33
1918	40
1919	39
1920	148
1921	34
1922	48
1923	134
1924	69
1925	178
1926	347
1927	179
1928	145
1929	141
1930	638
1931	267
1932	253
1933	551
1934	531
1935	171
1936	277
1937	236
1938	175
1939	1,174
1940	1,407
1941	869
1942	191
1943	614
1944	423
1945	884
1946	347
1947	733
1948	1,496
1949	358
1950	638
1951	1,102
1952	455
1953	707
1954	424
1955	611
1956	382
1957	910
1958	542
1959	513
1960	314
1961	551
1962	510
1963	518
1964	363
1965	659
1966	520
1967	682
1968	717
1969	352
1970	568
1971	587
1972	1,316
1973	903
1974	822
1975	704
1976	1,076
1977	1,069
1978	533
1979	1,096
1980	611
1981	1,068
1982	852
1983	877
1984	671
1985	734
1986	1,350
1987	606
1988	1,369
1989	1,838
1990	946
1991	1,484
1992	1,000
1993	586
1994	1,375
1995	1,173
1996	994
1997	3,094
1998	1,409
1999	873
2000	784
2001	1,369
2002	600
2003	1,079
2004	964
2005	536
2006	796
2007	1,144
2008	1,015
2009	811
2010	935
2011	1,026
2012	666
2013	1,039
2014	597
2015	504
2016	595
2017	519
2018	868
2019	685
2020	1,150
2021	710
2022	1,862
2023	1,262
2024	1,086
2025	1,281
2026	622

Download the Data

Data for records on 1964-04-12: 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 20	268
20 to 40	21
40 to 60	6
60 to 80	4
80 to 100	0
100 to 120	0
120 to 140	1