Weather Records on 11 April 1964

255 weather records were set or tied worldwide on 11 April 1964. Highest significance: Palermo, IT.

Key Facts for 11 April 1964

On 11 April 1964, 255 weather records were set or tied at long-record stations worldwide.
58 were record highs and 66 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 251 daily.
Palermo set a daily record precipitation of 32.6 mm (1.3 in) on 11 April 1964.
Across 164 earlier years (1800 to 2026) the same calendar date averaged 482 records.

Record Map

255 stations

255 station records on 11 April 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 April 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Palermo	Italy	Record daily precipitation	32.6 mm (1.3 in)	61 of 100 (Major)
Margaret River	Australia	Record daily precipitation	65.3 mm (2.6 in)	45 of 100 (Notable)
Jaguaruana	Brazil	Record daily precipitation	102.0 mm (4.0 in)	42 of 100 (Notable)
Paulistana	Brazil	Record daily precipitation	68.0 mm (2.7 in)	42 of 100 (Notable)
Tobolsk	Russia	Record low minimum temperature	-24.1 C (-11.4 F)	38 of 100 (Notable)
Olho Dagua	Brazil	Record daily precipitation	90.8 mm (3.6 in)	37 of 100 (Notable)
Gunnedah Pool	Australia	Record low maximum temperature	14.4 C (57.9 F)	36 of 100 (Notable)
Porteiras	Brazil	Record daily precipitation	66.1 mm (2.6 in)	35 of 100 (Notable)
Itapipoca	Brazil	Record daily precipitation	84.5 mm (3.3 in)	34 of 100 (Routine)
Driekoppies	South Africa	Record daily precipitation	37.0 mm (1.5 in)	34 of 100 (Routine)
Port Hastings	Canada	Record high maximum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Dhubri	India	Record daily precipitation	44.2 mm (1.7 in)	31 of 100 (Routine)
Barabinsk	Russia	Record low minimum temperature	-22.5 C (-8.5 F)	31 of 100 (Routine)
Conceicao	Brazil	Record daily precipitation	70.0 mm (2.8 in)	30 of 100 (Routine)
Lagoa da Canoa	Brazil	Record daily precipitation	25.1 mm (1.0 in)	29 of 100 (Routine)
Pindobacu	Brazil	Record daily precipitation	33.3 mm (1.3 in)	29 of 100 (Routine)
Hamersley	Australia	Record daily precipitation	36.1 mm (1.4 in)	28 of 100 (Routine)
Perm	Russia	Record low minimum temperature	-14.5 C (5.9 F)	28 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record high minimum temperature	0.5 C (32.9 F)	28 of 100 (Routine)
Kangela, Mtubatuba	South Africa	Record daily precipitation	60.6 mm (2.4 in)	28 of 100 (Routine)
Ennis	United States	Record daily snowfall	5.1 cm (2.0 in)	28 of 100 (Routine)
Petropavlovsk	Kazakhstan	Record low minimum temperature	-20.1 C (-4.2 F)	27 of 100 (Routine)
Logan 1 WNW	United States	Record high minimum temperature	13.3 C (55.9 F)	27 of 100 (Routine)
Haina 214	United States	Record low minimum temperature	14.4 C (57.9 F)	27 of 100 (Routine)
Crateus	Brazil	Record daily precipitation	47.5 mm (1.9 in)	26 of 100 (Routine)
Troicko-Pecherskoe	Russia	Record low minimum temperature	-25.9 C (-14.6 F)	25 of 100 (Routine)
Tatarsk	Russia	Record low minimum temperature	-19.7 C (-3.5 F)	25 of 100 (Routine)
Bedford	United States	Record high minimum temperature	11.7 C (53.1 F)	25 of 100 (Routine)
Solon Springs	United States	Record high minimum temperature	5.6 C (42.1 F)	25 of 100 (Routine)
Forest Grove	Australia	Record daily precipitation	43.2 mm (1.7 in)	24 of 100 (Routine)
Acude Patos	Brazil	Record daily precipitation	69.9 mm (2.8 in)	24 of 100 (Routine)
Mossoro	Brazil	Record daily precipitation	42.3 mm (1.7 in)	24 of 100 (Routine)
Mtunzini	South Africa	Record daily precipitation	72.5 mm (2.9 in)	24 of 100 (Routine)
Hooker	United States	Record high minimum temperature	11.1 C (52.0 F)	24 of 100 (Routine)
Kanin Nos	Russia	Record low maximum temperature	-14.8 C (5.4 F)	23 of 100 (Routine)
McCall	United States	Record daily snowfall	12.7 cm (5.0 in)	23 of 100 (Routine)
Ft Dodge 5NNW	United States	Record high minimum temperature	10.6 C (51.1 F)	23 of 100 (Routine)
Island Falls	Canada	Record daily snowfall	6.1 cm (2.4 in)	22 of 100 (Routine)
Pierson	Canada	Record daily snowfall	10.2 cm (4.0 in)	22 of 100 (Routine)
Pine Rvr Dam	United States	Record high minimum temperature	5.0 C (41.0 F)	22 of 100 (Routine)
Winnibigoshish Dam	United States	Record high maximum temperature	24.4 C (75.9 F)	22 of 100 (Routine)
Jati	Brazil	Record daily precipitation	71.0 mm (2.8 in)	21 of 100 (Routine)
Parnamirim (Leopoldina)	Brazil	Record daily precipitation	25.0 mm (1.0 in)	21 of 100 (Routine)
Fort Frances	Canada	Record high minimum temperature	5.6 C (42.1 F)	21 of 100 (Routine)
Narjan Mar	Russia	Record low maximum temperature	-20.6 C (-5.1 F)	21 of 100 (Routine)
Weeping Water	United States	Record high minimum temperature	12.2 C (54.0 F)	21 of 100 (Routine)
Erick	United States	Record high maximum temperature	31.1 C (88.0 F)	21 of 100 (Routine)
Nandgaon	India	Record daily precipitation	21.0 mm (0.8 in)	20 of 100 (Routine)
Jalna	India	Record daily precipitation	16.6 mm (0.7 in)	20 of 100 (Routine)
Turkestan	Kazakhstan	Record daily precipitation	13.2 mm (0.5 in)	20 of 100 (Routine)
Woolgorong	Australia	Record daily precipitation	15.5 mm (0.6 in)	20 of 100 (Routine)
Moosomin	Canada	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Ust-Maja	Russia	Record daily precipitation	8.5 mm (0.33 in)	20 of 100 (Routine)
Concrete Ppl Fish STN	United States	Record daily snowfall	3.3 cm (1.3 in)	20 of 100 (Routine)
Chandor	India	Record daily precipitation	0.9 mm (0.04 in)	20 of 100 (Routine)
Bullfinch	Australia	Record daily precipitation	10.7 mm (0.4 in)	20 of 100 (Routine)
Dindori	India	Record daily precipitation	0.8 mm (0.03 in)	20 of 100 (Routine)
Nabawa	Australia	Record daily precipitation	5.6 mm (0.22 in)	20 of 100 (Routine)
Strawberry North	Australia	Record daily precipitation	2.8 mm (0.11 in)	20 of 100 (Routine)
Island Falls	Canada	Record daily precipitation	5.6 mm (0.22 in)	20 of 100 (Routine)

Counts by Type and Timescale

255 records

Records set or tied on 11 April 1964 by type: Highest daily maximum 11, Lowest daily maximum 39, Highest daily minimum 47, Lowest daily minimum 27, Heaviest daily rainfall 116, Heaviest daily snowfall 13, Deepest snow cover 2.

Records on 11 April 1964 by type
Record type	Records
Highest daily maximum	11
Lowest daily maximum	39
Highest daily minimum	47
Lowest daily minimum	27
Heaviest daily rainfall	116
Heaviest daily snowfall	13
Deepest snow cover	2

Records on 11 April 1964 by timescale: all-time 0, monthly 4, daily 251.

How Much Records Were Beaten By

215 broken records

Margins by which the 215 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 62.2. Ties are not counted.

Top 20 by Significance

11 April 1964

Top 20 records on 11 April 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 April 1964	Palermo, IT	daily rain	32.6 mm (1.3 in)	17.0 mm (0.7 in)	110 years	61 of 100 (Major)
11 April 1964	Margaret River, AU	daily rain	65.3 mm (2.6 in)	51.8 mm (2.0 in)	9 years	45 of 100 (Notable)
11 April 1964	Jaguaruana, BR	daily rain	102.0 mm (4.0 in)	39.0 mm (1.5 in)	38 years	42 of 100 (Notable)
11 April 1964	Paulistana, BR	daily rain	68.0 mm (2.7 in)	51.3 mm (2.0 in)	20 years	42 of 100 (Notable)
11 April 1964	Tobolsk, RU	daily low min	-24.1 C (-11.4 F)	6.4 C (11.5 F)	71 years	38 of 100 (Notable)
11 April 1964	Olho Dagua, BR	daily rain	90.8 mm (3.6 in)	62.2 mm (2.4 in)	22 years	37 of 100 (Notable)
11 April 1964	Gunnedah Pool, AU	daily low max	14.4 C (57.9 F)	6.2 C (11.2 F)	46 years	36 of 100 (Notable)
11 April 1964	Porteiras, BR	daily rain	66.1 mm (2.6 in)	36.1 mm (1.4 in)	42 years	35 of 100 (Notable)
11 April 1964	Itapipoca, BR	daily rain	84.5 mm (3.3 in)	40.3 mm (1.6 in)	13 years	34 of 100 (Routine)
11 April 1964	Driekoppies, ZA	daily rain	37.0 mm (1.5 in)	24.0 mm (0.9 in)	33 years	34 of 100 (Routine)
11 April 1964	Port Hastings, CA	daily high max	15.0 C (59.0 F)	0.6 C (1.1 F)	77 years	33 of 100 (Routine)
11 April 1964	Dhubri, IN	daily rain	44.2 mm (1.7 in)	22.6 mm (0.9 in)	43 years	31 of 100 (Routine)
11 April 1964	Barabinsk, RU	daily low min	-22.5 C (-8.5 F)	4.9 C (8.8 F)	60 years	31 of 100 (Routine)
11 April 1964	Conceicao, BR	daily rain	70.0 mm (2.8 in)	22.0 mm (0.9 in)	48 years	30 of 100 (Routine)
11 April 1964	Lagoa da Canoa, BR	daily rain	25.1 mm (1.0 in)	12.5 mm (0.5 in)	43 years	29 of 100 (Routine)
11 April 1964	Pindobacu, BR	daily rain	33.3 mm (1.3 in)	27.3 mm (1.1 in)	15 years	29 of 100 (Routine)
11 April 1964	Hamersley, AU	daily rain	36.1 mm (1.4 in)	30.3 mm (1.2 in)	6 years	28 of 100 (Routine)
11 April 1964	Perm, RU	daily low min	-14.5 C (5.9 F)	0.5 C (0.9 F)	71 years	28 of 100 (Routine)
11 April 1964	Nikolaevsk-Na-Amure, RU	daily high min	0.5 C (32.9 F)	1.5 C (2.7 F)	63 years	28 of 100 (Routine)
11 April 1964	Kangela, Mtubatuba, ZA	daily rain	60.6 mm (2.4 in)	37.7 mm (1.5 in)	21 years	28 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

1800 to 1964

Records set or tied on this calendar date in each year from 1800 to 1964. 1964 had 255 records.

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

Records on 04-11 in each year
Year	Records
1800	1
1803	1
1808	1
1809	1
1812	3
1818	1
1831	1
1832	1
1834	1
1837	1
1845	1
1854	1
1857	1
1863	2
1865	2
1866	1
1868	1
1869	3
1871	1
1874	1
1876	2
1879	2
1880	2
1881	1
1882	2
1885	1
1886	1
1887	2
1888	4
1889	2
1890	2
1891	2
1892	3
1894	7
1895	5
1896	3
1898	7
1899	11
1900	6
1901	4
1902	6
1903	13
1904	12
1905	20
1906	19
1907	7
1908	12
1909	30
1910	19
1911	19
1912	47
1913	48
1914	38
1915	127
1916	64
1917	62
1918	43
1919	42
1920	73
1921	32
1922	140
1923	89
1924	169
1925	197
1926	198
1927	156
1928	220
1929	214
1930	761
1931	185
1932	497
1933	481
1934	246
1935	261
1936	175
1937	245
1938	289
1939	611
1940	932
1941	579
1942	301
1943	546
1944	626
1945	890
1946	383
1947	478
1948	921
1949	402
1950	322
1951	623
1952	502
1953	594
1954	392
1955	610
1956	420
1957	508
1958	473
1959	582
1960	469
1961	532
1962	384
1963	450
1964	255
1965	763
1966	599
1967	757
1968	663
1969	353
1970	522
1971	495
1972	792
1973	1,479
1974	982
1975	851
1976	478
1977	1,231
1978	854
1979	977
1980	399
1981	1,036
1982	1,132
1983	1,040
1984	623
1985	952
1986	1,062
1987	440
1988	1,162
1989	1,931
1990	1,347
1991	1,287
1992	978
1993	722
1994	952
1995	2,134
1996	1,182
1997	3,077
1998	916
1999	1,318
2000	667
2001	1,865
2002	568
2003	1,156
2004	888
2005	930
2006	666
2007	962
2008	1,373
2009	1,102
2010	623
2011	1,664
2012	806
2013	1,482
2014	633
2015	399
2016	534
2017	489
2018	795
2019	812
2020	625
2021	892
2022	1,179
2023	1,036
2024	782
2025	1,177
2026	604

Download the Data

Data for records on 1964-04-11: 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 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 10	177
10 to 20	12
20 to 30	12
30 to 40	7
40 to 50	1
50 to 60	5
60 to 70	1