Weather Records on 21 April 1927

284 weather records were set or tied worldwide on 21 April 1927. Highest significance: Arkadelphia 2 N, US.

Key Facts for 21 April 1927

On 21 April 1927, 284 weather records were set or tied at long-record stations worldwide.
64 were record highs and 160 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 8 monthly and 276 daily.
Arkadelphia 2 N set a daily record precipitation of 94.7 mm (3.7 in) on 21 April 1927.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 463 records.

Record Map

284 stations

284 station records on 21 April 1927 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1927: highest significance records shown on the map
Station	Country	Type	Value	Significance
Arkadelphia 2 N	United States	Record daily precipitation	94.7 mm (3.7 in)	49 of 100 (Notable)
Brinkley	United States	Record daily precipitation	68.1 mm (2.7 in)	32 of 100 (Routine)
Hot Springs 1 NNE	United States	Record daily precipitation	71.6 mm (2.8 in)	32 of 100 (Routine)
Malvern	United States	Record daily precipitation	89.4 mm (3.5 in)	32 of 100 (Routine)
Hernando	United States	Record daily precipitation	87.6 mm (3.4 in)	32 of 100 (Routine)
Philadelphia City	United States	Record daily precipitation	53.6 mm (2.1 in)	30 of 100 (Routine)
Calgary Int'l A	Canada	Record low minimum temperature	-13.3 C (8.1 F)	27 of 100 (Routine)
Quebec	Canada	Record high minimum temperature	7.2 C (45.0 F)	27 of 100 (Routine)
Caruthersville	United States	Record daily precipitation	38.6 mm (1.5 in)	27 of 100 (Routine)
Hay Springs	United States	Record low minimum temperature	-17.8 C (0.0 F)	27 of 100 (Routine)
Camden 1	United States	Record daily precipitation	45.7 mm (1.8 in)	24 of 100 (Routine)
Highmore	United States	Record low minimum temperature	-13.9 C (7.0 F)	24 of 100 (Routine)
Emmaville (Strathbogie)	Australia	Record daily precipitation	60.5 mm (2.4 in)	23 of 100 (Routine)
Swift Current	Canada	Record low minimum temperature	-11.7 C (10.9 F)	23 of 100 (Routine)
Mena	United States	Record daily precipitation	124.0 mm (4.9 in)	23 of 100 (Routine)
Lebanon 3 W	United States	Record daily precipitation	41.1 mm (1.6 in)	23 of 100 (Routine)
Howard	United States	Record low minimum temperature	-13.3 C (8.1 F)	23 of 100 (Routine)
Wentworth 2.5 WNW	United States	Record low minimum temperature	-11.1 C (12.0 F)	23 of 100 (Routine)
Watertown Rgnl AP	United States	Record low minimum temperature	-12.2 C (10.0 F)	23 of 100 (Routine)
La Delle 7 NE	United States	Record low minimum temperature	-17.8 C (0.0 F)	22 of 100 (Routine)
Mitchell 2 N	United States	Record daily snowfall	5.1 cm (2.0 in)	22 of 100 (Routine)
Milwaukee Wb City	United States	Record daily snowfall	5.6 cm (2.2 in)	22 of 100 (Routine)
Bozeman Montana State UNIV	United States	Record low minimum temperature	-11.7 C (10.9 F)	21 of 100 (Routine)
Santee	United States	Record low minimum temperature	-6.7 C (19.9 F)	21 of 100 (Routine)
Reading Wb City	United States	Record daily snowfall	0.5 cm (0.2 in)	20 of 100 (Routine)
Asheville	United States	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Timovskoe	Russia	Record daily precipitation	8.0 mm (0.31 in)	20 of 100 (Routine)
Vinga	Sweden	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Prince Albert	Canada	Record low minimum temperature	-22.2 C (-8.0 F)	20 of 100 (Routine)
Tranebjerg	Denmark	Record high minimum temperature	7.5 C (45.5 F)	20 of 100 (Routine)
Geilo	Norway	Record snow depth	185.0 cm (72.8 in)	20 of 100 (Routine)
Ekaterinburg	Russia	Record daily precipitation	10.0 mm (0.4 in)	20 of 100 (Routine)
New England	United States	Record low minimum temperature	-15.0 C (5.0 F)	20 of 100 (Routine)
Towanda 1 S	United States	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Brookings 2 NE	United States	Record low minimum temperature	-11.1 C (12.0 F)	20 of 100 (Routine)
Perryville	United States	Record daily precipitation	38.6 mm (1.5 in)	20 of 100 (Routine)
Kamloops	Canada	Record low minimum temperature	-6.7 C (19.9 F)	19 of 100 (Routine)
Yarmouth	Canada	Record high maximum temperature	20.0 C (68.0 F)	19 of 100 (Routine)
Middletown 4 W	United States	Record high maximum temperature	30.6 C (87.1 F)	19 of 100 (Routine)
Klamath Falls 2 SSW	United States	Record low minimum temperature	-7.2 C (19.0 F)	19 of 100 (Routine)
Centre Hall	United States	Record daily precipitation	50.8 mm (2.0 in)	19 of 100 (Routine)
Flandreau	United States	Record low minimum temperature	-11.7 C (10.9 F)	19 of 100 (Routine)
Battleford	Canada	Record low minimum temperature	-12.8 C (9.0 F)	18 of 100 (Routine)
Pointe Au Pere	Canada	Record high minimum temperature	3.3 C (37.9 F)	18 of 100 (Routine)
Marshalltown	United States	Record daily snowfall	2.5 cm (1.0 in)	18 of 100 (Routine)
Holly Springs 2 N	United States	Record daily precipitation	50.8 mm (2.0 in)	18 of 100 (Routine)
Ithaca Cornell UNIV	United States	Record daily precipitation	17.3 mm (0.7 in)	18 of 100 (Routine)
Faulkton	United States	Record low minimum temperature	-12.2 C (10.0 F)	18 of 100 (Routine)
Huron Rgnl AP	United States	Record low minimum temperature	-10.6 C (12.9 F)	18 of 100 (Routine)
Innsbruck	Austria	Record high maximum temperature	22.1 C (71.8 F)	17 of 100 (Routine)
Malmesbury	South Africa	Record daily precipitation	16.0 mm (0.6 in)	17 of 100 (Routine)
Ottumwa 1 WSW	United States	Record daily precipitation	19.3 mm (0.8 in)	17 of 100 (Routine)
Rockwell City	United States	Record daily snowfall	2.5 cm (1.0 in)	17 of 100 (Routine)
Lynd #2	United States	Record low minimum temperature	-5.6 C (21.9 F)	17 of 100 (Routine)
Batesville	United States	Record high minimum temperature	20.0 C (68.0 F)	17 of 100 (Routine)
Harrisonville	United States	Record low maximum temperature	8.9 C (48.0 F)	17 of 100 (Routine)
Forestburg 4 NNE	United States	Record low minimum temperature	-14.4 C (6.1 F)	17 of 100 (Routine)
Forestburg 4 NNE	United States	Record daily snowfall	2.0 cm (0.8 in)	17 of 100 (Routine)
Mitchell 2 N	United States	Record low minimum temperature	-9.4 C (15.1 F)	17 of 100 (Routine)
Mitchell 2 N	United States	Record snow depth	5.1 cm (2.0 in)	17 of 100 (Routine)

Counts by Type and Timescale

284 records

Records set or tied on 21 April 1927 by type: Highest daily maximum 27, Lowest daily maximum 58, Highest daily minimum 37, Lowest daily minimum 102, Heaviest daily rainfall 48, Heaviest daily snowfall 10, Deepest snow cover 2.

Records on 21 April 1927 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	58
Highest daily minimum	37
Lowest daily minimum	102
Heaviest daily rainfall	48
Heaviest daily snowfall	10
Deepest snow cover	2

Records on 21 April 1927 by timescale: all-time 0, monthly 8, daily 276.

How Much Records Were Beaten By

228 broken records

Margins by which the 228 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 500.0. Ties are not counted.

Top 20 by Significance

21 April 1927

Top 20 records on 21 April 1927 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1927	Arkadelphia 2 N, US	daily rain	94.7 mm (3.7 in)	69.0 mm (2.7 in)	21 years	49 of 100 (Notable)
21 April 1927	Brinkley, US	daily rain	68.1 mm (2.7 in)	30.0 mm (1.2 in)	42 years	32 of 100 (Routine)
21 April 1927	Hot Springs 1 NNE, US	daily rain	71.6 mm (2.8 in)	43.2 mm (1.7 in)	27 years	32 of 100 (Routine)
21 April 1927	Malvern, US	daily rain	89.4 mm (3.5 in)	25.9 mm (1.0 in)	43 years	32 of 100 (Routine)
21 April 1927	Hernando, US	daily rain	87.6 mm (3.4 in)	60.2 mm (2.4 in)	10 years	32 of 100 (Routine)
21 April 1927	Philadelphia City, US	daily rain	53.6 mm (2.1 in)	22.6 mm (0.9 in)	8 years	30 of 100 (Routine)
21 April 1927	Calgary Int'l A, CA	daily low min	-13.3 C (8.1 F)	6.1 C (11.0 F)	34 years	27 of 100 (Routine)
21 April 1927	Quebec, CA	daily high min	7.2 C (45.0 F)	3.9 C (7.0 F)	48 years	27 of 100 (Routine)
21 April 1927	Caruthersville, US	daily rain	38.6 mm (1.5 in)	31.0 mm (1.2 in)	5 years	27 of 100 (Routine)
21 April 1927	Hay Springs, US	daily low min	-17.8 C (0.0 F)	8.4 C (15.1 F)	20 years	27 of 100 (Routine)
21 April 1927	Camden 1, US	daily rain	45.7 mm (1.8 in)	22.8 mm (0.9 in)	27 years	24 of 100 (Routine)
21 April 1927	Highmore, US	daily low min	-13.9 C (7.0 F)	8.3 C (14.9 F)	21 years	24 of 100 (Routine)
21 April 1927	Emmaville (Strathbogie), AU	daily rain	60.5 mm (2.4 in)	22.4 mm (0.9 in)	17 years	23 of 100 (Routine)
21 April 1927	Swift Current, CA	daily low min	-11.7 C (10.9 F)	4.5 C (8.1 F)	33 years	23 of 100 (Routine)
21 April 1927	Mena, US	monthly rain	124.0 mm (4.9 in)	10.7 mm (0.4 in)	16 years	23 of 100 (Routine)
21 April 1927	Lebanon 3 W, US	daily rain	41.1 mm (1.6 in)	17.0 mm (0.7 in)	8 years	23 of 100 (Routine)
21 April 1927	Howard, US	daily low min	-13.3 C (8.1 F)	7.7 C (13.9 F)	21 years	23 of 100 (Routine)
21 April 1927	Wentworth 2.5 WNW, US	daily low min	-11.1 C (12.0 F)	5.5 C (9.9 F)	33 years	23 of 100 (Routine)
21 April 1927	Watertown Rgnl AP, US	daily low min	-12.2 C (10.0 F)	5.5 C (9.9 F)	33 years	23 of 100 (Routine)
21 April 1927	La Delle 7 NE, US	monthly low min	-17.8 C (0.0 F)	1.1 C (2.0 F)	28 years	22 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

1793 to 1927

Records set or tied on this calendar date in each year from 1793 to 1927. 1927 had 284 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 1927-04-21: 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 2026-10-14 (14 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 100	227
100 to 200	0
200 to 300	0
300 to 400	0
400 to 500	1