Weather Records on 20 April 1966

1,174 weather records were set or tied worldwide on 20 April 1966. Highest significance: Franklin, US.

Key Facts for 20 April 1966

On 20 April 1966, 1,174 weather records were set or tied at long-record stations worldwide.
69 were record highs and 778 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 17 monthly and 1,157 daily.
Franklin set a daily record snowfall of 14.0 cm (5.5 in) on 20 April 1966.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 458 records.

Record Map

1,174 stations

1,174 station records on 20 April 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Franklin	United States	Record daily snowfall	14.0 cm (5.5 in)	58 of 100 (Notable)
Corozal Substn	Puerto Rico [United States]	Record daily precipitation	154.9 mm (6.1 in)	57 of 100 (Notable)
Gove 4W	United States	Record daily snowfall	18.3 cm (7.2 in)	56 of 100 (Notable)
Red Lake Indian Agcy	United States	Record daily snowfall	15.2 cm (6.0 in)	51 of 100 (Notable)
Park Rapids Muni AP	United States	Record daily snowfall	19.8 cm (7.8 in)	51 of 100 (Notable)
Jefferson City Wtp	United States	Record daily precipitation	54.9 mm (2.2 in)	48 of 100 (Notable)
Vicksburg	United States	Record daily precipitation	124.2 mm (4.9 in)	48 of 100 (Notable)
Mattoon	United States	Record daily precipitation	63.8 mm (2.5 in)	47 of 100 (Notable)
Leoti	United States	Record daily snowfall	17.8 cm (7.0 in)	47 of 100 (Notable)
Tobermory	Canada	Record daily precipitation	31.2 mm (1.2 in)	45 of 100 (Notable)
Arecibo 3 ESE	Puerto Rico [United States]	Record daily precipitation	83.8 mm (3.3 in)	45 of 100 (Notable)
Crocker	United States	Record daily precipitation	60.5 mm (2.4 in)	45 of 100 (Notable)
Mitchell 5E	United States	Record snow depth	10.2 cm (4.0 in)	44 of 100 (Notable)
Sharon Springs	United States	Record daily snowfall	7.6 cm (3.0 in)	43 of 100 (Notable)
Tribune 1W	United States	Record daily snowfall	22.9 cm (9.0 in)	43 of 100 (Notable)
Detroit Lakes 1 NNE	United States	Record snow depth	10.2 cm (4.0 in)	43 of 100 (Notable)
Victor 4 N	United States	Record daily snowfall	10.2 cm (4.0 in)	43 of 100 (Notable)
Chugwater	United States	Record low minimum temperature	-22.2 C (-8.0 F)	43 of 100 (Notable)
Huron Rgnl AP	United States	Record snow depth	10.2 cm (4.0 in)	43 of 100 (Notable)
Jammalamadugu	India	Record daily precipitation	74.7 mm (2.9 in)	42 of 100 (Notable)
Tribune 1W	United States	Record snow depth	22.9 cm (9.0 in)	42 of 100 (Notable)
Owensville	United States	Record daily precipitation	38.1 mm (1.5 in)	42 of 100 (Notable)
Caninde de Sao Francisco	Brazil	Record daily precipitation	42.0 mm (1.7 in)	41 of 100 (Notable)
Estes Park	United States	Record low minimum temperature	-21.7 C (-7.1 F)	41 of 100 (Notable)
Grover 10 W	United States	Record low minimum temperature	-16.1 C (3.0 F)	41 of 100 (Notable)
Lamar	United States	Record daily snowfall	10.2 cm (4.0 in)	41 of 100 (Notable)
Norton 9SSE	United States	Record daily snowfall	7.6 cm (3.0 in)	41 of 100 (Notable)
Riverton	United States	Record low minimum temperature	-18.9 C (-2.0 F)	41 of 100 (Notable)
Phillipsburg 1 SSE	United States	Record snow depth	15.2 cm (6.0 in)	40 of 100 (Notable)
Oelrichs	United States	Record low minimum temperature	-15.0 C (5.0 F)	40 of 100 (Notable)
Dull Ctr 1SE	United States	Record low minimum temperature	-22.8 C (-9.0 F)	40 of 100 (Notable)
Cape Otway Lighthouse	Australia	Record high maximum temperature	26.7 C (80.1 F)	39 of 100 (Notable)
Adur	India	Record daily precipitation	92.2 mm (3.6 in)	39 of 100 (Notable)
Kendall	United States	Record low minimum temperature	-27.2 C (-17.0 F)	39 of 100 (Notable)
Torrington Exp Farm	United States	Record low minimum temperature	-18.9 C (-2.0 F)	39 of 100 (Notable)
Cheyenne	United States	Record low minimum temperature	-18.9 C (-2.0 F)	39 of 100 (Notable)
Quinter	United States	Record snow depth	12.7 cm (5.0 in)	38 of 100 (Notable)
Wadena 3 S	United States	Record daily snowfall	26.7 cm (10.5 in)	38 of 100 (Notable)
Kimball 2NE	United States	Record low minimum temperature	-16.1 C (3.0 F)	38 of 100 (Notable)
Ashley	United States	Record low minimum temperature	-13.9 C (7.0 F)	38 of 100 (Notable)
Kennebec	United States	Record low minimum temperature	-13.3 C (8.1 F)	38 of 100 (Notable)
Pine Ridge	United States	Record low minimum temperature	-20.6 C (-5.1 F)	38 of 100 (Notable)
Vale	United States	Record low minimum temperature	-17.8 C (0.0 F)	38 of 100 (Notable)
Evanston 1 E	United States	Record low minimum temperature	-16.1 C (3.0 F)	38 of 100 (Notable)
Ponnani	India	Record daily precipitation	78.2 mm (3.1 in)	37 of 100 (Notable)
Detroit Lakes 1 NNE	United States	Record daily snowfall	10.2 cm (4.0 in)	37 of 100 (Notable)
Monroe City	United States	Record daily precipitation	44.7 mm (1.8 in)	37 of 100 (Notable)
Woodruff	United States	Record low minimum temperature	-18.9 C (-2.0 F)	37 of 100 (Notable)
Deniliquin (Wilkinson St)	Australia	Record high minimum temperature	16.1 C (61.0 F)	36 of 100 (Notable)
Rocky Ford 2 SE	United States	Record low minimum temperature	-7.2 C (19.0 F)	36 of 100 (Notable)
Wadena 3 S	United States	Record snow depth	20.3 cm (8.0 in)	36 of 100 (Notable)
Ainsworth	United States	Record low minimum temperature	-12.8 C (9.0 F)	36 of 100 (Notable)
Springview 2NW	United States	Record low minimum temperature	-11.7 C (10.9 F)	36 of 100 (Notable)
Pioche	United States	Record low minimum temperature	-10.6 C (12.9 F)	36 of 100 (Notable)
Britton	United States	Record low minimum temperature	-15.6 C (3.9 F)	36 of 100 (Notable)
Bloomsbury Post Office	Australia	Record daily precipitation	38.1 mm (1.5 in)	35 of 100 (Notable)
Sveg	Sweden	Record low minimum temperature	-15.1 C (4.8 F)	35 of 100 (Notable)
Pitea	Sweden	Record low minimum temperature	-17.6 C (0.3 F)	35 of 100 (Notable)
Canon City	United States	Record low minimum temperature	-8.3 C (17.1 F)	35 of 100 (Notable)
Lamar	United States	Record snow depth	15.2 cm (6.0 in)	35 of 100 (Notable)

Counts by Type and Timescale

1,174 records

Records set or tied on 20 April 1966 by type: Highest daily maximum 18, Lowest daily maximum 320, Highest daily minimum 51, Lowest daily minimum 458, Heaviest daily rainfall 201, Heaviest daily snowfall 72, Deepest snow cover 54.

Records on 20 April 1966 by type
Record type	Records
Highest daily maximum	18
Lowest daily maximum	320
Highest daily minimum	51
Lowest daily minimum	458
Heaviest daily rainfall	201
Heaviest daily snowfall	72
Deepest snow cover	54

Records on 20 April 1966 by timescale: all-time 0, monthly 17, daily 1,157.

How Much Records Were Beaten By

987 broken records

Margins by which the 987 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 330.0. Ties are not counted.

Top 20 by Significance

20 April 1966

Top 20 records on 20 April 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 1966	Franklin, US	daily snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	77 years	58 of 100 (Notable)
20 April 1966	Corozal Substn, PR	monthly rain	154.9 mm (6.1 in)	72.3 mm (2.8 in)	13 years	57 of 100 (Notable)
20 April 1966	Gove 4W, US	daily snowfall	18.3 cm (7.2 in)	15.8 cm (6.2 in)	60 years	56 of 100 (Notable)
20 April 1966	Red Lake Indian Agcy, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	71 years	51 of 100 (Notable)
20 April 1966	Park Rapids Muni AP, US	daily snowfall	19.8 cm (7.8 in)	13.4 cm (5.3 in)	72 years	51 of 100 (Notable)
20 April 1966	Jefferson City Wtp, US	daily rain	54.9 mm (2.2 in)	26.2 mm (1.0 in)	61 years	48 of 100 (Notable)
20 April 1966	Vicksburg, US	daily rain	124.2 mm (4.9 in)	94.5 mm (3.7 in)	19 years	48 of 100 (Notable)
20 April 1966	Mattoon, US	daily rain	63.8 mm (2.5 in)	42.2 mm (1.7 in)	1 year	47 of 100 (Notable)
20 April 1966	Leoti, US	daily snowfall	17.8 cm (7.0 in)	16.5 cm (6.5 in)	48 years	47 of 100 (Notable)
20 April 1966	Tobermory, CA	daily rain	31.2 mm (1.2 in)	18.5 mm (0.7 in)	45 years	45 of 100 (Notable)
20 April 1966	Arecibo 3 ESE, PR	daily rain	83.8 mm (3.3 in)	61.2 mm (2.4 in)	9 years	45 of 100 (Notable)
20 April 1966	Crocker, US	daily rain	60.5 mm (2.4 in)	44.8 mm (1.8 in)	19 years	45 of 100 (Notable)
20 April 1966	Mitchell 5E, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	56 years	44 of 100 (Notable)
20 April 1966	Sharon Springs, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	72 years	43 of 100 (Notable)
20 April 1966	Tribune 1W, US	monthly snowfall	22.9 cm (9.0 in)	5.1 cm (2.0 in)	50 years	43 of 100 (Notable)
20 April 1966	Detroit Lakes 1 NNE, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	65 years	43 of 100 (Notable)
20 April 1966	Victor 4 N, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	41 years	43 of 100 (Notable)
20 April 1966	Chugwater, US	daily low min	-22.2 C (-8.0 F)	11.1 C (20.0 F)	48 years	43 of 100 (Notable)
20 April 1966	Huron Rgnl AP, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	72 years	43 of 100 (Notable)
20 April 1966	Jammalamadugu, IN	monthly rain	74.7 mm (2.9 in)	17.5 mm (0.7 in)	31 years	42 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 1966

Records set or tied on this calendar date in each year from 1807 to 1966. 1966 had 1,174 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 1966-04-20: 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 50	920
50 to 100	41
100 to 150	14
150 to 200	8
200 to 250	2
250 to 300	1
300 to 350	1