Weather Records on 21 April 1966

756 weather records were set or tied worldwide on 21 April 1966. Highest significance: New Iberia AP - Acadiana Rgnl, US.

Key Facts for 21 April 1966

On 21 April 1966, 756 weather records were set or tied at long-record stations worldwide.
82 were record highs and 385 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 746 daily.
New Iberia AP - Acadiana Rgnl set a daily record precipitation of 182.6 mm (7.2 in) on 21 April 1966.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

756 stations

756 station records on 21 April 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
New Iberia AP - Acadiana Rgnl	United States	Record daily precipitation	182.6 mm (7.2 in)	64 of 100 (Major)
Kosciusko	United States	Record daily precipitation	109.2 mm (4.3 in)	61 of 100 (Major)
Port Gibson 1 NE	United States	Record daily precipitation	144.3 mm (5.7 in)	61 of 100 (Major)
Rayne 6 N	United States	Record daily precipitation	89.2 mm (3.5 in)	58 of 100 (Notable)
Tallulah	United States	Record daily precipitation	138.9 mm (5.5 in)	57 of 100 (Notable)
Detour Village	United States	Record daily precipitation	36.8 mm (1.4 in)	52 of 100 (Notable)
Louisville	United States	Record daily precipitation	97.0 mm (3.8 in)	52 of 100 (Notable)
St Joseph 3 N	United States	Record daily precipitation	173.5 mm (6.8 in)	51 of 100 (Notable)
Baldwin	United States	Record daily precipitation	39.1 mm (1.5 in)	50 of 100 (Notable)
Adur	India	Record daily precipitation	89.2 mm (3.5 in)	48 of 100 (Notable)
Uralsk	Kazakhstan	Record daily precipitation	33.1 mm (1.3 in)	47 of 100 (Notable)
Amasia	Armenia	Record daily precipitation	26.6 mm (1.0 in)	45 of 100 (Notable)
Mayo A	Canada	Record daily snowfall	7.1 cm (2.8 in)	43 of 100 (Notable)
Bjuraker	Sweden	Record low minimum temperature	-18.0 C (-0.4 F)	43 of 100 (Notable)
Winnsboro 5 SSE	United States	Record daily precipitation	81.8 mm (3.2 in)	43 of 100 (Notable)
Academy 2NE	United States	Record snow depth	10.2 cm (4.0 in)	43 of 100 (Notable)
Malayattur	India	Record daily precipitation	83.8 mm (3.3 in)	42 of 100 (Notable)
Nossa Senhora da Gloria	Brazil	Record daily precipitation	113.2 mm (4.5 in)	40 of 100 (Notable)
Atchafalaya	United States	Record daily precipitation	103.1 mm (4.1 in)	40 of 100 (Notable)
Motozintla (Smn)	Mexico	Record daily precipitation	32.3 mm (1.3 in)	39 of 100 (Notable)
Houma	United States	Record daily precipitation	53.8 mm (2.1 in)	39 of 100 (Notable)
Tewantin Post Office	Australia	Record daily precipitation	95.3 mm (3.8 in)	38 of 100 (Notable)
Outtrim	Australia	Record daily precipitation	42.7 mm (1.7 in)	38 of 100 (Notable)
Canton 4N	United States	Record daily precipitation	72.1 mm (2.8 in)	38 of 100 (Notable)
Natchez	United States	Record daily precipitation	101.9 mm (4.0 in)	38 of 100 (Notable)
Weslaco	United States	Record daily precipitation	88.1 mm (3.5 in)	37 of 100 (Notable)
Port Stanley	Canada	Record high minimum temperature	9.4 C (48.9 F)	36 of 100 (Notable)
Huntingdon	Canada	Record high maximum temperature	25.6 C (78.1 F)	36 of 100 (Notable)
Ranebennur	India	Record daily precipitation	101.4 mm (4.0 in)	36 of 100 (Notable)
Isabela Substn	Puerto Rico [United States]	Record low maximum temperature	25.0 C (77.0 F)	36 of 100 (Notable)
Macon 2 NE	United States	Record daily precipitation	71.1 mm (2.8 in)	36 of 100 (Notable)
Cashmere Downs	Australia	Record daily precipitation	27.4 mm (1.1 in)	35 of 100 (Notable)
Jeremoabo	Brazil	Record daily precipitation	34.0 mm (1.3 in)	35 of 100 (Notable)
Moosonee Ua	Canada	Record daily snowfall	14.0 cm (5.5 in)	35 of 100 (Notable)
Belzoni	United States	Record daily precipitation	82.6 mm (3.3 in)	35 of 100 (Notable)
Buderim Post Office	Australia	Record daily precipitation	94.5 mm (3.7 in)	34 of 100 (Routine)
Mount Cotton West	Australia	Record daily precipitation	99.8 mm (3.9 in)	34 of 100 (Routine)
Glenwood 3SW	United States	Record low minimum temperature	-5.6 C (21.9 F)	34 of 100 (Routine)
Crowley 2 NE	United States	Record daily precipitation	87.6 mm (3.4 in)	34 of 100 (Routine)
Clarksdale	United States	Record daily precipitation	69.9 mm (2.8 in)	34 of 100 (Routine)
Nevada Wtp	United States	Record low minimum temperature	-3.9 C (25.0 F)	34 of 100 (Routine)
Anadarko 3 E	United States	Record low minimum temperature	-1.7 C (28.9 F)	34 of 100 (Routine)
Raymondville	United States	Record daily precipitation	91.4 mm (3.6 in)	34 of 100 (Routine)
Port Hastings	Canada	Record high maximum temperature	16.1 C (61.0 F)	33 of 100 (Routine)
Stromsfoss Sluse	Norway	Record snow depth	23.0 cm (9.1 in)	33 of 100 (Routine)
Beloit	United States	Record low minimum temperature	-6.1 C (21.0 F)	33 of 100 (Routine)
Grenada	United States	Record daily precipitation	71.9 mm (2.8 in)	33 of 100 (Routine)
State UNIV	United States	Record daily precipitation	57.9 mm (2.3 in)	33 of 100 (Routine)
Windsor	United States	Record low minimum temperature	-2.8 C (27.0 F)	33 of 100 (Routine)
Grinnell 3 SW	United States	Record low minimum temperature	-7.8 C (18.0 F)	32 of 100 (Routine)
Fall Rvr Lake	United States	Record low minimum temperature	-3.3 C (26.1 F)	32 of 100 (Routine)
Greenwood	United States	Record daily precipitation	73.7 mm (2.9 in)	32 of 100 (Routine)
Fairbury 7S	United States	Record low minimum temperature	-6.7 C (19.9 F)	32 of 100 (Routine)
Mission 4 W	United States	Record daily precipitation	71.9 mm (2.8 in)	32 of 100 (Routine)
New Orleans Audubon	United States	Record daily precipitation	48.3 mm (1.9 in)	32 of 100 (Routine)
Kvareli	Georgia	Record daily precipitation	36.2 mm (1.4 in)	31 of 100 (Routine)
Winfield 2 SW	United States	Record daily precipitation	65.0 mm (2.6 in)	31 of 100 (Routine)
Rushville	United States	Record daily precipitation	49.5 mm (1.9 in)	31 of 100 (Routine)
Howard 2SE	United States	Record low minimum temperature	-7.2 C (19.0 F)	31 of 100 (Routine)
Lake Providence	United States	Record daily precipitation	39.4 mm (1.6 in)	31 of 100 (Routine)

Counts by Type and Timescale

756 records

Records set or tied on 21 April 1966 by type: Highest daily maximum 18, Lowest daily maximum 90, Highest daily minimum 64, Lowest daily minimum 295, Heaviest daily rainfall 253, Heaviest daily snowfall 13, Deepest snow cover 23.

Records on 21 April 1966 by type
Record type	Records
Highest daily maximum	18
Lowest daily maximum	90
Highest daily minimum	64
Lowest daily minimum	295
Heaviest daily rainfall	253
Heaviest daily snowfall	13
Deepest snow cover	23

Records on 21 April 1966 by timescale: all-time 0, monthly 10, daily 746.

How Much Records Were Beaten By

651 broken records

Margins by which the 651 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 310.0. Ties are not counted.

Top 20 by Significance

21 April 1966

Top 20 records on 21 April 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1966	New Iberia AP - Acadiana Rgnl, US	daily rain	182.6 mm (7.2 in)	169.9 mm (6.7 in)	59 years	64 of 100 (Major)
21 April 1966	Kosciusko, US	daily rain	109.2 mm (4.3 in)	68.6 mm (2.7 in)	49 years	61 of 100 (Major)
21 April 1966	Port Gibson 1 NE, US	daily rain	144.3 mm (5.7 in)	98.6 mm (3.9 in)	48 years	61 of 100 (Major)
21 April 1966	Rayne 6 N, US	daily rain	89.2 mm (3.5 in)	75.2 mm (3.0 in)	48 years	58 of 100 (Notable)
21 April 1966	Tallulah, US	daily rain	138.9 mm (5.5 in)	104.6 mm (4.1 in)	37 years	57 of 100 (Notable)
21 April 1966	Detour Village, US	daily rain	36.8 mm (1.4 in)	18.8 mm (0.7 in)	56 years	52 of 100 (Notable)
21 April 1966	Louisville, US	daily rain	97.0 mm (3.8 in)	43.7 mm (1.7 in)	73 years	52 of 100 (Notable)
21 April 1966	St Joseph 3 N, US	daily rain	173.5 mm (6.8 in)	142.5 mm (5.6 in)	15 years	51 of 100 (Notable)
21 April 1966	Baldwin, US	daily rain	39.1 mm (1.5 in)	30.5 mm (1.2 in)	12 years	50 of 100 (Notable)
21 April 1966	Adur, IN	daily rain	89.2 mm (3.5 in)	71.4 mm (2.8 in)	8 years	48 of 100 (Notable)
21 April 1966	Uralsk, KZ	daily rain	33.1 mm (1.3 in)	29.2 mm (1.1 in)	4 years	47 of 100 (Notable)
21 April 1966	Amasia, AM	daily rain	26.6 mm (1.0 in)	18.2 mm (0.7 in)	27 years	45 of 100 (Notable)
21 April 1966	Mayo A, CA	daily snowfall	7.1 cm (2.8 in)	5.8 cm (2.3 in)	31 years	43 of 100 (Notable)
21 April 1966	Bjuraker, SE	daily low min	-18.0 C (-0.4 F)	6.0 C (10.8 F)	66 years	43 of 100 (Notable)
21 April 1966	Winnsboro 5 SSE, US	daily rain	81.8 mm (3.2 in)	55.4 mm (2.2 in)	28 years	43 of 100 (Notable)
21 April 1966	Academy 2NE, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	66 years	43 of 100 (Notable)
21 April 1966	Malayattur, IN	daily rain	83.8 mm (3.3 in)	38.8 mm (1.5 in)	49 years	42 of 100 (Notable)
21 April 1966	Nossa Senhora da Gloria, BR	monthly rain	113.2 mm (4.5 in)	30.2 mm (1.2 in)	15 years	40 of 100 (Notable)
21 April 1966	Atchafalaya, US	daily rain	103.1 mm (4.1 in)	63.0 mm (2.5 in)	32 years	40 of 100 (Notable)
21 April 1966	Motozintla (Smn), MX	daily rain	32.3 mm (1.3 in)	24.4 mm (1.0 in)	5 years	39 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

1793 to 1966

Records set or tied on this calendar date in each year from 1793 to 1966. 1966 had 756 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 1966-04-21: 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 50	619
50 to 100	19
100 to 150	6
150 to 200	4
200 to 250	0
250 to 300	2
300 to 350	1