Weather Records on 21 April 2010

805 weather records were set or tied worldwide on 21 April 2010. Highest significance: Wilmington, AU.

Key Facts for 21 April 2010

On 21 April 2010, 805 weather records were set or tied at long-record stations worldwide.
270 were record highs and 232 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 35 monthly and 767 daily.
Wilmington set a daily record precipitation of 54.6 mm (2.1 in) on 21 April 2010.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

805 stations

805 station records on 21 April 2010 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 2010: highest significance records shown on the map
Station	Country	Type	Value	Significance
Wilmington	Australia	Record daily precipitation	54.6 mm (2.1 in)	80 of 100 (Exceptional)
Lemon Cove	United States	Record daily precipitation	46.0 mm (1.8 in)	67 of 100 (Major)
Hallett (Old Canowie)	Australia	Record daily precipitation	41.4 mm (1.6 in)	66 of 100 (Major)
Tulelake	United States	Record daily snowfall	10.2 cm (4.0 in)	62 of 100 (Major)
Barrow AP	United States	Record daily snowfall	13.7 cm (5.4 in)	61 of 100 (Major)
Hart Mtn Refuge	United States	Record daily precipitation	38.6 mm (1.5 in)	54 of 100 (Notable)
Mornington	Australia	Record daily precipitation	46.0 mm (1.8 in)	52 of 100 (Notable)
Boxian	China	Record daily precipitation	56.5 mm (2.2 in)	52 of 100 (Notable)
Adel	United States	Record daily precipitation	26.7 mm (1.1 in)	51 of 100 (Notable)
Hart Mtn Refuge	United States	Record daily snowfall	17.3 cm (6.8 in)	50 of 100 (Notable)
Buckley 1 NE	United States	Record daily precipitation	28.7 mm (1.1 in)	50 of 100 (Notable)
Snoqualmie Falls	United States	Record daily precipitation	30.7 mm (1.2 in)	48 of 100 (Notable)
Apoinga (Wilivere)	Australia	Record daily precipitation	30.0 mm (1.2 in)	46 of 100 (Notable)
Perth (Forestry Nursery)	Australia	Record daily precipitation	35.4 mm (1.4 in)	46 of 100 (Notable)
Hart Mtn Refuge	United States	Record snow depth	15.2 cm (6.0 in)	46 of 100 (Notable)
Andamooka	Australia	Record daily precipitation	38.4 mm (1.5 in)	45 of 100 (Notable)
Dibrugarh/Mohanbar	India	Record daily precipitation	57.9 mm (2.3 in)	44 of 100 (Notable)
Westbury (Valley View)	Australia	Record daily precipitation	26.0 mm (1.0 in)	43 of 100 (Notable)
Jess Valley	United States	Record daily precipitation	27.9 mm (1.1 in)	43 of 100 (Notable)
Dutch Harbor	United States	Record daily snowfall	7.6 cm (3.0 in)	43 of 100 (Notable)
Hallett (Ulooloo)	Australia	Record daily precipitation	57.4 mm (2.3 in)	42 of 100 (Notable)
Ganyu	China	Record daily precipitation	43.8 mm (1.7 in)	42 of 100 (Notable)
Hazlehurst	United States	Record daily precipitation	26.7 mm (1.1 in)	42 of 100 (Notable)
Richland	United States	Record daily precipitation	32.8 mm (1.3 in)	42 of 100 (Notable)
New Meadows Rs	United States	Record high minimum temperature	5.6 C (42.1 F)	41 of 100 (Notable)
Kolob	United States	Record daily precipitation	43.2 mm (1.7 in)	41 of 100 (Notable)
Tizi Ouzou	Algeria	Record high maximum temperature	28.6 C (83.5 F)	40 of 100 (Notable)
San Antonio Tejas	Mexico	Record low maximum temperature	18.9 C (66.0 F)	40 of 100 (Notable)
Squaw Butte-Northern Great Bas	United States	Record daily precipitation	38.1 mm (1.5 in)	40 of 100 (Notable)
Rosso	Mauritania	Record high minimum temperature	29.0 C (84.2 F)	39 of 100 (Notable)
Ponce 4 E	Puerto Rico [United States]	Record high maximum temperature	34.4 C (93.9 F)	39 of 100 (Notable)
Grant Grove	United States	Record daily snowfall	52.3 cm (20.6 in)	39 of 100 (Notable)
Dyer 5S	United States	Record daily snowfall	10.2 cm (4.0 in)	39 of 100 (Notable)
Castle Dale	United States	Record high minimum temperature	8.9 C (48.0 F)	39 of 100 (Notable)
Bengbu	China	Record daily precipitation	28.6 mm (1.1 in)	38 of 100 (Notable)
Beja	Portugal	Record daily precipitation	33.8 mm (1.3 in)	38 of 100 (Notable)
Adin Rs	United States	Record daily snowfall	12.7 cm (5.0 in)	38 of 100 (Notable)
Dyer 5S	United States	Record snow depth	10.2 cm (4.0 in)	38 of 100 (Notable)
Monroe	United States	Record daily precipitation	28.7 mm (1.1 in)	38 of 100 (Notable)
Glendambo (Millers Creek)	Australia	Record daily precipitation	52.0 mm (2.0 in)	37 of 100 (Notable)
Moorooduc	Australia	Record daily precipitation	52.4 mm (2.1 in)	37 of 100 (Notable)
Phuket	Thailand	Record daily precipitation	45.2 mm (1.8 in)	37 of 100 (Notable)
Grant Grove	United States	Record daily precipitation	79.8 mm (3.1 in)	37 of 100 (Notable)
Missoula 6 NW WFO	United States	Record high minimum temperature	12.2 C (54.0 F)	37 of 100 (Notable)
Tarlee	Australia	Record daily precipitation	31.8 mm (1.3 in)	36 of 100 (Notable)
Johnson Pass	United States	Record daily precipitation	30.0 mm (1.2 in)	36 of 100 (Notable)
Riverton	United States	Record high minimum temperature	6.1 C (43.0 F)	36 of 100 (Notable)
Hagley (Fairbank)	Australia	Record daily precipitation	28.2 mm (1.1 in)	35 of 100 (Notable)
Coeur D'Alene	United States	Record high minimum temperature	9.4 C (48.9 F)	35 of 100 (Notable)
Auberry 2 NW	United States	Record low maximum temperature	7.8 C (46.0 F)	34 of 100 (Routine)
Big Creek Ph 1	United States	Record low maximum temperature	2.8 C (37.0 F)	34 of 100 (Routine)
Quiriego (Smn)	Mexico	Record low maximum temperature	25.6 C (78.1 F)	33 of 100 (Routine)
Volta Ph	United States	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Ft Stewart	United States	Record daily precipitation	40.6 mm (1.6 in)	33 of 100 (Routine)
Vernon Creek	United States	Record daily precipitation	30.5 mm (1.2 in)	33 of 100 (Routine)
La Rumorosa	Mexico	Record low minimum temperature	-2.2 C (28.0 F)	32 of 100 (Routine)
San Miguel Chimalapa	Mexico	Record low minimum temperature	5.0 C (41.0 F)	32 of 100 (Routine)
Lava Beds Nat Mon	United States	Record daily snowfall	7.6 cm (3.0 in)	32 of 100 (Routine)
Modesto AP	United States	Record low maximum temperature	11.1 C (52.0 F)	32 of 100 (Routine)
Zhengzhou	China	Record daily precipitation	35.5 mm (1.4 in)	31 of 100 (Routine)

Counts by Type and Timescale

805 records

Records set or tied on 21 April 2010 by type: Highest daily maximum 98, Lowest daily maximum 149, Highest daily minimum 172, Lowest daily minimum 83, Heaviest daily rainfall 272, Heaviest daily snowfall 20, Deepest snow cover 11.

Records on 21 April 2010 by type
Record type	Records
Highest daily maximum	98
Lowest daily maximum	149
Highest daily minimum	172
Lowest daily minimum	83
Heaviest daily rainfall	272
Heaviest daily snowfall	20
Deepest snow cover	11

Records on 21 April 2010 by timescale: all-time 3, monthly 35, daily 767.

How Much Records Were Beaten By

610 broken records

Margins by which the 610 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 218.0. Ties are not counted.

Top 20 by Significance

21 April 2010

Top 20 records on 21 April 2010 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 2010	Wilmington, AU	daily rain	54.6 mm (2.1 in)	44.7 mm (1.8 in)	100 years	80 of 100 (Exceptional)
21 April 2010	Lemon Cove, US	daily rain	46.0 mm (1.8 in)	24.7 mm (1.0 in)	108 years	67 of 100 (Major)
21 April 2010	Hallett (Old Canowie), AU	daily rain	41.4 mm (1.6 in)	26.9 mm (1.1 in)	63 years	66 of 100 (Major)
21 April 2010	Tulelake, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	77 years	62 of 100 (Major)
21 April 2010	Barrow AP, US	daily snowfall	13.7 cm (5.4 in)	11.2 cm (4.4 in)	36 years	61 of 100 (Major)
21 April 2010	Hart Mtn Refuge, US	daily rain	38.6 mm (1.5 in)	19.8 mm (0.8 in)	27 years	54 of 100 (Notable)
21 April 2010	Mornington, AU	daily rain	46.0 mm (1.8 in)	9.7 mm (0.38 in)	108 years	52 of 100 (Notable)
21 April 2010	Boxian, CN	daily rain	56.5 mm (2.2 in)	35.4 mm (1.4 in)	45 years	52 of 100 (Notable)
21 April 2010	Adel, US	daily rain	26.7 mm (1.1 in)	20.3 mm (0.8 in)	20 years	51 of 100 (Notable)
21 April 2010	Hart Mtn Refuge, US	daily snowfall	17.3 cm (6.8 in)	12.2 cm (4.8 in)	39 years	50 of 100 (Notable)
21 April 2010	Buckley 1 NE, US	daily rain	28.7 mm (1.1 in)	9.9 mm (0.39 in)	88 years	50 of 100 (Notable)
21 April 2010	Snoqualmie Falls, US	daily rain	30.7 mm (1.2 in)	9.1 mm (0.36 in)	89 years	48 of 100 (Notable)
21 April 2010	Apoinga (Wilivere), AU	daily rain	30.0 mm (1.2 in)	21.2 mm (0.8 in)	36 years	46 of 100 (Notable)
21 April 2010	Perth (Forestry Nursery), AU	daily rain	35.4 mm (1.4 in)	23.2 mm (0.9 in)	44 years	46 of 100 (Notable)
21 April 2010	Hart Mtn Refuge, US	daily snow depth	15.2 cm (6.0 in)	10.1 cm (4.0 in)	39 years	46 of 100 (Notable)
21 April 2010	Andamooka, AU	daily rain	38.4 mm (1.5 in)	30.8 mm (1.2 in)	29 years	45 of 100 (Notable)
21 April 2010	Dibrugarh/Mohanbar, IN	daily rain	57.9 mm (2.3 in)	31.7 mm (1.2 in)	52 years	44 of 100 (Notable)
21 April 2010	Westbury (Valley View), AU	daily rain	26.0 mm (1.0 in)	9.0 mm (0.35 in)	84 years	43 of 100 (Notable)
21 April 2010	Jess Valley, US	daily rain	27.9 mm (1.1 in)	17.5 mm (0.7 in)	24 years	43 of 100 (Notable)
21 April 2010	Dutch Harbor, US	daily snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	87 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

1793 to 2010

Records set or tied on this calendar date in each year from 1793 to 2010. 2010 had 805 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 2010-04-21: 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 50	600
50 to 100	3
100 to 150	6
150 to 200	0
200 to 250	1