Weather Records on 20 April 1964

749 weather records were set or tied worldwide on 20 April 1964. Highest significance: Curlewis (Pine Cliff), AU.

Key Facts for 20 April 1964

On 20 April 1964, 749 weather records were set or tied at long-record stations worldwide.
270 were record highs and 70 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 31 monthly and 717 daily.
Curlewis (Pine Cliff) set a daily record precipitation of 57.2 mm (2.3 in) on 20 April 1964.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 460 records.

Record Map

749 stations

749 station records on 20 April 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Curlewis (Pine Cliff)	Australia	Record daily precipitation	57.2 mm (2.3 in)	58 of 100 (Notable)
Penrose (Panorama)	Australia	Record daily precipitation	76.2 mm (3.0 in)	54 of 100 (Notable)
Nerriga Composite	Australia	Record daily precipitation	60.7 mm (2.4 in)	54 of 100 (Notable)
Burkes Flat	Australia	Record daily precipitation	50.0 mm (2.0 in)	54 of 100 (Notable)
Crawfordsville Pwr Plt	United States	Record daily precipitation	67.3 mm (2.6 in)	54 of 100 (Notable)
Bellefontaine	United States	Record daily precipitation	62.5 mm (2.5 in)	54 of 100 (Notable)
Rushville	United States	Record daily precipitation	59.7 mm (2.4 in)	52 of 100 (Notable)
Frankfort Disposal	United States	Record daily precipitation	80.3 mm (3.2 in)	51 of 100 (Notable)
Canton L&D 20	United States	Record daily precipitation	44.2 mm (1.7 in)	51 of 100 (Notable)
Bundanoon Bowling Club	Australia	Record daily precipitation	86.4 mm (3.4 in)	49 of 100 (Notable)
Anderson 1 N	United States	Record daily precipitation	56.9 mm (2.2 in)	49 of 100 (Notable)
Whitestown	United States	Record daily precipitation	67.8 mm (2.7 in)	49 of 100 (Notable)
Donora 1 SW	United States	Record daily precipitation	42.2 mm (1.7 in)	49 of 100 (Notable)
Anderson Wtr Wks	United States	Record daily precipitation	58.4 mm (2.3 in)	48 of 100 (Notable)
Berne Wwtp	United States	Record daily precipitation	54.6 mm (2.1 in)	48 of 100 (Notable)
Memphis	United States	Record daily precipitation	81.0 mm (3.2 in)	48 of 100 (Notable)
Blue Rapids	United States	Record daily precipitation	52.6 mm (2.1 in)	46 of 100 (Notable)
Centerville	United States	Record daily precipitation	71.1 mm (2.8 in)	44 of 100 (Notable)
Coshocton Wpc Plt	United States	Record daily precipitation	45.7 mm (1.8 in)	44 of 100 (Notable)
Minto Surrey Street	Australia	Record daily precipitation	56.9 mm (2.2 in)	43 of 100 (Notable)
Sao Luiz Do Curu	Brazil	Record daily precipitation	150.2 mm (5.9 in)	43 of 100 (Notable)
Lincoln	United States	Record daily precipitation	56.1 mm (2.2 in)	43 of 100 (Notable)
Moyston	Australia	Record daily precipitation	25.7 mm (1.0 in)	42 of 100 (Notable)
New Martinsville 4 NNE	United States	Record daily precipitation	47.2 mm (1.9 in)	42 of 100 (Notable)
Willaura (Main Street)	Australia	Record daily precipitation	29.2 mm (1.1 in)	41 of 100 (Notable)
Limoeiro de Anadia	Brazil	Record daily precipitation	77.5 mm (3.1 in)	41 of 100 (Notable)
Decatur Wtp	United States	Record daily precipitation	47.5 mm (1.9 in)	41 of 100 (Notable)
Franklin 2 NNE	United States	Record daily precipitation	66.0 mm (2.6 in)	41 of 100 (Notable)
Unionville	United States	Record daily precipitation	56.9 mm (2.2 in)	41 of 100 (Notable)
Wickliffe	Australia	Record daily precipitation	27.4 mm (1.1 in)	40 of 100 (Notable)
Marshall	United States	Record daily precipitation	44.5 mm (1.8 in)	40 of 100 (Notable)
Mornington Island	Australia	Record daily precipitation	114.0 mm (4.5 in)	39 of 100 (Notable)
Epping Chester Street	Australia	Record daily precipitation	49.3 mm (1.9 in)	39 of 100 (Notable)
Putbus	Germany	Record high minimum temperature	9.8 C (49.6 F)	39 of 100 (Notable)
New Harmony	United States	Record daily precipitation	55.6 mm (2.2 in)	39 of 100 (Notable)
Shelbina	United States	Record daily precipitation	39.4 mm (1.6 in)	39 of 100 (Notable)
Hyndman	United States	Record daily precipitation	52.1 mm (2.1 in)	39 of 100 (Notable)
Sage 4 NNW	United States	Record daily snowfall	12.7 cm (5.0 in)	39 of 100 (Notable)
Bathurst Gaol	Australia	Record high minimum temperature	14.4 C (57.9 F)	38 of 100 (Notable)
Assare	Brazil	Record daily precipitation	52.5 mm (2.1 in)	38 of 100 (Notable)
Clifton	United States	Record daily precipitation	45.7 mm (1.8 in)	38 of 100 (Notable)
Martin	United States	Record daily precipitation	30.5 mm (1.2 in)	38 of 100 (Notable)
Kings Tablelands	Australia	Record daily precipitation	57.2 mm (2.3 in)	37 of 100 (Notable)
Heathcote Junction	Australia	Record daily precipitation	34.0 mm (1.3 in)	37 of 100 (Notable)
Touros	Brazil	Record daily precipitation	108.0 mm (4.3 in)	37 of 100 (Notable)
Riachao Do Jacuipe	Brazil	Record daily precipitation	34.2 mm (1.3 in)	37 of 100 (Notable)
Albia 3 NNE	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Plattsmouth 1E	United States	Record daily precipitation	32.5 mm (1.3 in)	37 of 100 (Notable)
Jacksonville 2E	United States	Record daily precipitation	72.9 mm (2.9 in)	36 of 100 (Notable)
Noblesville River	United States	Record daily precipitation	44.7 mm (1.8 in)	36 of 100 (Notable)
Columbus Junction	United States	Record daily precipitation	59.7 mm (2.4 in)	36 of 100 (Notable)
Wapello	United States	Record daily precipitation	62.5 mm (2.5 in)	36 of 100 (Notable)
Lima Wwtp	United States	Record daily precipitation	43.2 mm (1.7 in)	36 of 100 (Notable)
Katoomba (Murri St)	Australia	Record daily precipitation	72.6 mm (2.9 in)	35 of 100 (Notable)
Roberts 3 N	United States	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
Keokuk L&D 19	United States	Record daily precipitation	89.2 mm (3.5 in)	35 of 100 (Notable)
Ness City	United States	Record daily precipitation	38.9 mm (1.5 in)	35 of 100 (Notable)
Lusk 2 SW	United States	Record daily precipitation	31.0 mm (1.2 in)	35 of 100 (Notable)
Albion Park Post Office	Australia	Record daily precipitation	84.1 mm (3.3 in)	34 of 100 (Routine)
Grindstone Island	Canada	Record low maximum temperature	-2.8 C (27.0 F)	34 of 100 (Routine)

Counts by Type and Timescale

749 records

Records set or tied on 20 April 1964 by type: Highest daily maximum 45, Lowest daily maximum 37, Highest daily minimum 225, Lowest daily minimum 33, Heaviest daily rainfall 390, Heaviest daily snowfall 18, Deepest snow cover 1.

Records on 20 April 1964 by type
Record type	Records
Highest daily maximum	45
Lowest daily maximum	37
Highest daily minimum	225
Lowest daily minimum	33
Heaviest daily rainfall	390
Heaviest daily snowfall	18
Deepest snow cover	1

Records on 20 April 1964 by timescale: all-time 1, monthly 31, daily 717.

How Much Records Were Beaten By

630 broken records

Margins by which the 630 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

20 April 1964

Top 20 records on 20 April 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 1964	Curlewis (Pine Cliff), AU	daily rain	57.2 mm (2.3 in)	52.1 mm (2.1 in)	40 years	58 of 100 (Notable)
20 April 1964	Penrose (Panorama), AU	daily rain	76.2 mm (3.0 in)	60.2 mm (2.4 in)	29 years	54 of 100 (Notable)
20 April 1964	Nerriga Composite, AU	daily rain	60.7 mm (2.4 in)	48.8 mm (1.9 in)	47 years	54 of 100 (Notable)
20 April 1964	Burkes Flat, AU	daily rain	50.0 mm (2.0 in)	48.0 mm (1.9 in)	29 years	54 of 100 (Notable)
20 April 1964	Crawfordsville Pwr Plt, US	daily rain	67.3 mm (2.6 in)	38.1 mm (1.5 in)	46 years	54 of 100 (Notable)
20 April 1964	Bellefontaine, US	daily rain	62.5 mm (2.5 in)	33.5 mm (1.3 in)	24 years	54 of 100 (Notable)
20 April 1964	Rushville, US	daily rain	59.7 mm (2.4 in)	26.2 mm (1.0 in)	70 years	52 of 100 (Notable)
20 April 1964	Frankfort Disposal, US	daily rain	80.3 mm (3.2 in)	32.5 mm (1.3 in)	44 years	51 of 100 (Notable)
20 April 1964	Canton L&D 20, US	daily rain	44.2 mm (1.7 in)	25.1 mm (1.0 in)	70 years	51 of 100 (Notable)
20 April 1964	Bundanoon Bowling Club, AU	daily rain	86.4 mm (3.4 in)	58.5 mm (2.3 in)	37 years	49 of 100 (Notable)
20 April 1964	Anderson 1 N, US	daily rain	56.9 mm (2.2 in)	26.9 mm (1.1 in)	59 years	49 of 100 (Notable)
20 April 1964	Whitestown, US	daily rain	67.8 mm (2.7 in)	27.7 mm (1.1 in)	59 years	49 of 100 (Notable)
20 April 1964	Donora 1 SW, US	daily rain	42.2 mm (1.7 in)	30.8 mm (1.2 in)	31 years	49 of 100 (Notable)
20 April 1964	Anderson Wtr Wks, US	daily rain	58.4 mm (2.3 in)	26.9 mm (1.1 in)	44 years	48 of 100 (Notable)
20 April 1964	Berne Wwtp, US	daily rain	54.6 mm (2.1 in)	26.7 mm (1.1 in)	44 years	48 of 100 (Notable)
20 April 1964	Memphis, US	monthly rain	81.0 mm (3.2 in)	28.7 mm (1.1 in)	19 years	48 of 100 (Notable)
20 April 1964	Blue Rapids, US	daily rain	52.6 mm (2.1 in)	26.7 mm (1.1 in)	46 years	46 of 100 (Notable)
20 April 1964	Centerville, US	daily rain	71.1 mm (2.8 in)	31.7 mm (1.2 in)	33 years	44 of 100 (Notable)
20 April 1964	Coshocton Wpc Plt, US	daily rain	45.7 mm (1.8 in)	20.3 mm (0.8 in)	53 years	44 of 100 (Notable)
20 April 1964	Minto Surrey Street, AU	daily rain	56.9 mm (2.2 in)	22.4 mm (0.9 in)	69 years	43 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

1807 to 1964

Records set or tied on this calendar date in each year from 1807 to 1964. 1964 had 749 records.

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

Records on 04-20 in each year
Year	Records
1807	3
1817	1
1838	1
1849	2
1851	1
1852	4
1854	1
1858	1
1860	1
1864	1
1865	3
1868	1
1869	1
1870	1
1872	1
1874	3
1875	4
1876	1
1878	2
1880	2
1881	2
1884	1
1885	1
1886	2
1889	1
1891	2
1892	1
1893	6
1894	8
1895	7
1896	3
1897	6
1898	1
1899	1
1901	8
1902	3
1903	14
1904	31
1905	9
1906	12
1907	18
1908	14
1909	22
1910	25
1911	18
1912	12
1913	19
1914	46
1915	45
1916	19
1917	33
1918	42
1919	17
1920	49
1921	27
1922	40
1923	157
1924	113
1925	169
1926	310
1927	442
1928	212
1929	182
1930	87
1931	255
1932	166
1933	279
1934	384
1935	384
1936	311
1937	427
1938	339
1939	158
1940	519
1941	558
1942	223
1943	670
1944	304
1945	391
1946	395
1947	308
1948	493
1949	477
1950	329
1951	690
1952	552
1953	1,071
1954	377
1955	623
1956	384
1957	730
1958	327
1959	563
1960	472
1961	1,078
1962	487
1963	595
1964	749
1965	724
1966	1,174
1967	864
1968	975
1969	382
1970	948
1971	765
1972	531
1973	982
1974	673
1975	344
1976	661
1977	693
1978	800
1979	495
1980	1,539
1981	706
1982	906
1983	1,844
1984	922
1985	1,140
1986	770
1987	1,447
1988	1,144
1989	1,187
1990	1,495
1991	1,075
1992	1,009
1993	772
1994	756
1995	1,351
1996	970
1997	833
1998	1,490
1999	674
2000	931
2001	752
2002	1,081
2003	758
2004	567
2005	707
2006	859
2007	582
2008	1,110
2009	845
2010	693
2011	1,477
2012	726
2013	1,520
2014	384
2015	702
2016	650
2017	734
2018	1,309
2019	1,019
2020	449
2021	1,215
2022	596
2023	828
2024	673
2025	836
2026	533

Download the Data

Data for records on 1964-04-20: 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	569
20 to 40	50
40 to 60	6
60 to 80	3
80 to 100	1
100 to 120	0
120 to 140	1