Weather Records on 20 April 1981

706 weather records were set or tied worldwide on 20 April 1981. Highest significance: Grand View 4 NW, US.

Key Facts for 20 April 1981

On 20 April 1981, 706 weather records were set or tied at long-record stations worldwide.
208 were record highs and 162 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 35 monthly and 670 daily.
Grand View 4 NW set a daily record precipitation of 26.4 mm (1.0 in) on 20 April 1981.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 460 records.

Record Map

706 stations

706 station records on 20 April 1981 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 1981: highest significance records shown on the map
Station	Country	Type	Value	Significance
Grand View 4 NW	United States	Record daily precipitation	26.4 mm (1.0 in)	67 of 100 (Major)
Estancia	Brazil	Record daily precipitation	130.0 mm (5.1 in)	65 of 100 (Major)
Arco	United States	Record daily precipitation	41.7 mm (1.6 in)	61 of 100 (Major)
Benkelman 1N	United States	Record daily precipitation	73.9 mm (2.9 in)	60 of 100 (Major)
Sandheads	India	Record daily precipitation	59.9 mm (2.4 in)	57 of 100 (Notable)
Clutha Station	Australia	Record daily precipitation	40.0 mm (1.6 in)	53 of 100 (Notable)
Arrowrock Dam	United States	Record daily precipitation	34.3 mm (1.4 in)	51 of 100 (Notable)
Haigler	United States	Record daily precipitation	58.9 mm (2.3 in)	51 of 100 (Notable)
Park Valley	United States	Record daily precipitation	33.5 mm (1.3 in)	50 of 100 (Notable)
Millerstown	United States	Record daily precipitation	66.0 mm (2.6 in)	49 of 100 (Notable)
Booby Island Lighthouse	Australia	Record daily precipitation	80.0 mm (3.1 in)	47 of 100 (Notable)
Grouse	United States	Record daily precipitation	35.6 mm (1.4 in)	47 of 100 (Notable)
Idaho City	United States	Record daily precipitation	26.2 mm (1.0 in)	47 of 100 (Notable)
Vastervik	Sweden	Record low minimum temperature	-5.8 C (21.6 F)	46 of 100 (Notable)
Rostov-Na-Donu	Russia	Record daily precipitation	34.0 mm (1.3 in)	45 of 100 (Notable)
Anderson Dam	United States	Record daily precipitation	25.9 mm (1.0 in)	45 of 100 (Notable)
Garden Valley	United States	Record daily precipitation	35.6 mm (1.4 in)	45 of 100 (Notable)
Mt Vernon 3 NE	United States	Record daily precipitation	65.3 mm (2.6 in)	44 of 100 (Notable)
Dubois Exp STN	United States	Record daily precipitation	31.8 mm (1.3 in)	43 of 100 (Notable)
Milan	Italy	Record low maximum temperature	8.0 C (46.4 F)	42 of 100 (Notable)
Estancia	Brazil	Record daily precipitation	119.2 mm (4.7 in)	41 of 100 (Notable)
Iqaluit A	Canada	Record daily snowfall	17.0 cm (6.7 in)	41 of 100 (Notable)
Greensburg	United States	Record daily precipitation	49.3 mm (1.9 in)	41 of 100 (Notable)
Kiev	Ukraine	Record low maximum temperature	2.3 C (36.1 F)	40 of 100 (Notable)
Little Mtn	United States	Record daily precipitation	52.8 mm (2.1 in)	40 of 100 (Notable)
Durham	Canada	Record low maximum temperature	-0.5 C (31.1 F)	39 of 100 (Notable)
Hailey 3 NNW	United States	Record daily precipitation	38.1 mm (1.5 in)	39 of 100 (Notable)
Hazelton	United States	Record daily precipitation	25.9 mm (1.0 in)	39 of 100 (Notable)
Culbertson	United States	Record daily precipitation	57.4 mm (2.3 in)	39 of 100 (Notable)
Marquette	United States	Record low maximum temperature	0.6 C (33.1 F)	39 of 100 (Notable)
Petersburg 61 Brg	United States	Record daily precipitation	76.5 mm (3.0 in)	38 of 100 (Notable)
Dundee 2NE	United States	Record daily precipitation	50.8 mm (2.0 in)	38 of 100 (Notable)
Stratton	United States	Record daily precipitation	69.6 mm (2.7 in)	37 of 100 (Notable)
Wandering Comparison	Australia	Record high maximum temperature	34.0 C (93.2 F)	36 of 100 (Notable)
Sulitjelma	Norway	Record daily precipitation	25.5 mm (1.0 in)	36 of 100 (Notable)
Fleming	United States	Record daily precipitation	38.1 mm (1.5 in)	36 of 100 (Notable)
Newberry	United States	Record daily precipitation	32.5 mm (1.3 in)	36 of 100 (Notable)
Northam	Australia	Record high maximum temperature	35.8 C (96.4 F)	35 of 100 (Notable)
Julesburg	United States	Record daily precipitation	43.2 mm (1.7 in)	35 of 100 (Notable)
Howe	United States	Record daily precipitation	38.9 mm (1.5 in)	34 of 100 (Routine)
Munfordville 5 NW	United States	Record daily precipitation	52.1 mm (2.1 in)	34 of 100 (Routine)
Warren	United States	Record high minimum temperature	1.7 C (35.1 F)	33 of 100 (Routine)
Nitta Yuma	United States	Record high maximum temperature	31.7 C (89.1 F)	33 of 100 (Routine)
Riverside 7 SSW	United States	Record high minimum temperature	8.9 C (48.0 F)	33 of 100 (Routine)
Hatton 9 SE	United States	Record high minimum temperature	12.2 C (54.0 F)	33 of 100 (Routine)
Katanning Comparison	Australia	Record high maximum temperature	31.3 C (88.3 F)	32 of 100 (Routine)
Aracaju	Brazil	Record daily precipitation	160.0 mm (6.3 in)	32 of 100 (Routine)
McCall	United States	Record high minimum temperature	3.9 C (39.0 F)	32 of 100 (Routine)
Lakin	United States	Record high minimum temperature	11.7 C (53.1 F)	32 of 100 (Routine)
Bowling Green	United States	Record daily precipitation	79.8 mm (3.1 in)	32 of 100 (Routine)
Leitchfield 2 N	United States	Record daily precipitation	63.5 mm (2.5 in)	32 of 100 (Routine)
Springfield 2W	United States	Record daily precipitation	44.5 mm (1.8 in)	32 of 100 (Routine)
Woodbury	United States	Record daily precipitation	68.3 mm (2.7 in)	32 of 100 (Routine)
Trenton Dam 1N	United States	Record daily precipitation	50.3 mm (2.0 in)	32 of 100 (Routine)
Nerchinskij Zavod	Russia	Record high maximum temperature	24.4 C (75.9 F)	31 of 100 (Routine)
Otis 11 NE	United States	Record daily precipitation	35.6 mm (1.4 in)	31 of 100 (Routine)
Centerville Cooper Dr	United States	Record daily precipitation	26.4 mm (1.0 in)	31 of 100 (Routine)
Brewster 4W	United States	Record daily precipitation	42.7 mm (1.7 in)	31 of 100 (Routine)
Wallowa	United States	Record high minimum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Miyako	Japan	Record daily precipitation	77.0 mm (3.0 in)	30 of 100 (Routine)

Counts by Type and Timescale

706 records

Records set or tied on 20 April 1981 by type: Highest daily maximum 87, Lowest daily maximum 92, Highest daily minimum 121, Lowest daily minimum 70, Heaviest daily rainfall 312, Heaviest daily snowfall 23, Deepest snow cover 1.

Records on 20 April 1981 by type
Record type	Records
Highest daily maximum	87
Lowest daily maximum	92
Highest daily minimum	121
Lowest daily minimum	70
Heaviest daily rainfall	312
Heaviest daily snowfall	23
Deepest snow cover	1

Records on 20 April 1981 by timescale: all-time 1, monthly 35, daily 670.

How Much Records Were Beaten By

601 broken records

Margins by which the 601 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 112.0. Ties are not counted.

Top 20 by Significance

20 April 1981

Top 20 records on 20 April 1981 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 1981	Grand View 4 NW, US	daily rain	26.4 mm (1.0 in)	19.5 mm (0.8 in)	68 years	67 of 100 (Major)
20 April 1981	Estancia, BR	monthly rain	130.0 mm (5.1 in)	49.0 mm (1.9 in)	47 years	65 of 100 (Major)
20 April 1981	Arco, US	monthly rain	41.7 mm (1.6 in)	23.4 mm (0.9 in)	17 years	61 of 100 (Major)
20 April 1981	Benkelman 1N, US	monthly rain	73.9 mm (2.9 in)	20.6 mm (0.8 in)	68 years	60 of 100 (Major)
20 April 1981	Sandheads, IN	daily rain	59.9 mm (2.4 in)	51.5 mm (2.0 in)	52 years	57 of 100 (Notable)
20 April 1981	Clutha Station, AU	daily rain	40.0 mm (1.6 in)	40.0 mm (1.6 in)	66 years	53 of 100 (Notable)
20 April 1981	Arrowrock Dam, US	daily rain	34.3 mm (1.4 in)	17.3 mm (0.7 in)	36 years	51 of 100 (Notable)
20 April 1981	Haigler, US	monthly rain	58.9 mm (2.3 in)	8.1 mm (0.32 in)	80 years	51 of 100 (Notable)
20 April 1981	Park Valley, US	monthly rain	33.5 mm (1.3 in)	9.1 mm (0.36 in)	48 years	50 of 100 (Notable)
20 April 1981	Millerstown, US	daily rain	66.0 mm (2.6 in)	45.9 mm (1.8 in)	40 years	49 of 100 (Notable)
20 April 1981	Booby Island Lighthouse, AU	daily rain	80.0 mm (3.1 in)	45.2 mm (1.8 in)	48 years	47 of 100 (Notable)
20 April 1981	Grouse, US	monthly rain	35.6 mm (1.4 in)	12.5 mm (0.5 in)	23 years	47 of 100 (Notable)
20 April 1981	Idaho City, US	daily rain	26.2 mm (1.0 in)	10.2 mm (0.4 in)	76 years	47 of 100 (Notable)
20 April 1981	Vastervik, SE	daily low min	-5.8 C (21.6 F)	2.3 C (4.1 F)	96 years	46 of 100 (Notable)
20 April 1981	Rostov-Na-Donu, RU	monthly rain	34.0 mm (1.3 in)	7.9 mm (0.31 in)	45 years	45 of 100 (Notable)
20 April 1981	Anderson Dam, US	daily rain	25.9 mm (1.0 in)	15.2 mm (0.6 in)	36 years	45 of 100 (Notable)
20 April 1981	Garden Valley, US	monthly rain	35.6 mm (1.4 in)	7.4 mm (0.29 in)	46 years	45 of 100 (Notable)
20 April 1981	Mt Vernon 3 NE, US	daily rain	65.3 mm (2.6 in)	20.3 mm (0.8 in)	63 years	44 of 100 (Notable)
20 April 1981	Dubois Exp STN, US	monthly rain	31.8 mm (1.3 in)	8.4 mm (0.33 in)	24 years	43 of 100 (Notable)
20 April 1981	Milan, IT	daily low max	8.0 C (46.4 F)	1.0 C (1.8 F)	131 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 1981

Records set or tied on this calendar date in each year from 1807 to 1981. 1981 had 706 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 1981-04-20: 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	560
20 to 40	31
40 to 60	7
60 to 80	2
80 to 100	0
100 to 120	1