Weather Records on 21 April 2007

480 weather records were set or tied worldwide on 21 April 2007. Highest significance: Gustavus, US.

Key Facts for 21 April 2007

On 21 April 2007, 480 weather records were set or tied at long-record stations worldwide.
234 were record highs and 135 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 469 daily.
Gustavus set a daily record snow depth of 35.6 cm (14.0 in) on 21 April 2007.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

480 stations

480 station records on 21 April 2007 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 2007: highest significance records shown on the map
Station	Country	Type	Value	Significance
Gustavus	United States	Record snow depth	35.6 cm (14.0 in)	65 of 100 (Major)
Watertown Rgnl AP	United States	Record daily precipitation	58.9 mm (2.3 in)	62 of 100 (Major)
San Diego Curupatzeo	Mexico	Record low minimum temperature	6.7 C (44.1 F)	47 of 100 (Notable)
Cooper Landing 5 W	United States	Record daily precipitation	30.5 mm (1.2 in)	47 of 100 (Notable)
Nemours (Ghazaouet)	Algeria	Record high minimum temperature	16.0 C (60.8 F)	44 of 100 (Notable)
Colebrook 3SW	United States	Record daily precipitation	37.6 mm (1.5 in)	41 of 100 (Notable)
Milan	Italy	Record high maximum temperature	27.9 C (82.2 F)	39 of 100 (Notable)
Forman 5 SSE	United States	Record daily precipitation	43.4 mm (1.7 in)	39 of 100 (Notable)
Kadoka	United States	Record high minimum temperature	10.6 C (51.1 F)	39 of 100 (Notable)
Don Muang	Thailand	Record high minimum temperature	29.4 C (84.9 F)	37 of 100 (Notable)
Erzurum	Turkey	Record low minimum temperature	-16.2 C (2.8 F)	37 of 100 (Notable)
San Simon	United States	Record low maximum temperature	18.9 C (66.0 F)	35 of 100 (Notable)
Covelo	United States	Record daily precipitation	26.9 mm (1.1 in)	34 of 100 (Routine)
Placerville 3SE	United States	Record daily snowfall	15.2 cm (6.0 in)	34 of 100 (Routine)
Jackman	United States	Record snow depth	71.1 cm (28.0 in)	34 of 100 (Routine)
Anchorage Merrill Fld	United States	Record high maximum temperature	13.3 C (55.9 F)	34 of 100 (Routine)
Lake Crescent (Serat)	Australia	Record daily precipitation	25.8 mm (1.0 in)	33 of 100 (Routine)
Downieville	United States	Record daily precipitation	41.9 mm (1.6 in)	33 of 100 (Routine)
Fargo Hector Intl AP	United States	Record high minimum temperature	13.3 C (55.9 F)	33 of 100 (Routine)
Los Reyes	Mexico	Record low minimum temperature	1.7 C (35.1 F)	32 of 100 (Routine)
Fedafjorden II	Norway	Record daily precipitation	39.5 mm (1.6 in)	32 of 100 (Routine)
Skagway	United States	Record high maximum temperature	17.2 C (63.0 F)	32 of 100 (Routine)
Huron Rgnl AP	United States	Record high minimum temperature	14.4 C (57.9 F)	32 of 100 (Routine)
Tiree	United Kingdom	Record high minimum temperature	9.5 C (49.1 F)	31 of 100 (Routine)
Menno	United States	Record high minimum temperature	14.4 C (57.9 F)	31 of 100 (Routine)
Valdez WSO	United States	Record high maximum temperature	13.9 C (57.0 F)	31 of 100 (Routine)
Tepelmeme de Morelos	Mexico	Record high minimum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Lajas Substn	Puerto Rico [United States]	Record high minimum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Troutdale	United States	Record low minimum temperature	-2.8 C (27.0 F)	29 of 100 (Routine)
Wasta	United States	Record daily precipitation	27.2 mm (1.1 in)	29 of 100 (Routine)
Waubay Natl Wild Life	United States	Record daily precipitation	28.2 mm (1.1 in)	29 of 100 (Routine)
Presa El Giron	Mexico	Record high minimum temperature	12.8 C (55.0 F)	28 of 100 (Routine)
Guayama 1SW	Puerto Rico [United States]	Record daily precipitation	67.3 mm (2.6 in)	28 of 100 (Routine)
Nantucket Mem AP	United States	Record high maximum temperature	20.6 C (69.1 F)	28 of 100 (Routine)
Park Rapids Muni AP	United States	Record daily precipitation	26.2 mm (1.0 in)	28 of 100 (Routine)
Yushu	China	Record high minimum temperature	5.3 C (41.5 F)	27 of 100 (Routine)
Milan	Italy	Record high minimum temperature	17.2 C (63.0 F)	27 of 100 (Routine)
Esengyly	Turkmenistan	Record low minimum temperature	1.0 C (33.8 F)	27 of 100 (Routine)
Camilla 3SE	United States	Record low maximum temperature	20.6 C (69.1 F)	27 of 100 (Routine)
Mc Leod 3 E	United States	Record daily precipitation	31.5 mm (1.2 in)	27 of 100 (Routine)
Palmer Job Corps	United States	Record high maximum temperature	16.7 C (62.1 F)	27 of 100 (Routine)
Kailua 446	United States	Record low maximum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
El Porvenir	Mexico	Record high maximum temperature	35.6 C (96.1 F)	26 of 100 (Routine)
Ponce 4 E	Puerto Rico [United States]	Record high minimum temperature	24.4 C (75.9 F)	26 of 100 (Routine)
Ft Kent	United States	Record snow depth	38.1 cm (15.0 in)	26 of 100 (Routine)
Redfield	United States	Record high minimum temperature	10.6 C (51.1 F)	26 of 100 (Routine)
Enshi	China	Record daily precipitation	38.9 mm (1.5 in)	25 of 100 (Routine)
Papaloapan	Mexico	Record low maximum temperature	26.7 C (80.1 F)	25 of 100 (Routine)
Mayaguez City	Puerto Rico [United States]	Record high minimum temperature	23.9 C (75.0 F)	25 of 100 (Routine)
Kitt Peak	United States	Record low minimum temperature	-6.7 C (19.9 F)	25 of 100 (Routine)
Port Alexander	United States	Record high maximum temperature	16.1 C (61.0 F)	25 of 100 (Routine)
Norfolk Karl Stefan Mem AP	United States	Record high minimum temperature	15.6 C (60.1 F)	25 of 100 (Routine)
N Platte Rgnl AP	United States	Record high minimum temperature	12.8 C (55.0 F)	25 of 100 (Routine)
Barrow AP	United States	Record high minimum temperature	-8.3 C (17.1 F)	25 of 100 (Routine)
Mont-Aigoual	France	Record high minimum temperature	9.1 C (48.4 F)	24 of 100 (Routine)
Toulouse-Blagnac	France	Record high maximum temperature	26.3 C (79.3 F)	24 of 100 (Routine)
Chiconautla	Mexico	Record high minimum temperature	12.8 C (55.0 F)	24 of 100 (Routine)
El Refugio de Los Ibarra	Mexico	Record low maximum temperature	15.0 C (59.0 F)	24 of 100 (Routine)
Juncos 1 SE	Puerto Rico [United States]	Record high minimum temperature	23.9 C (75.0 F)	24 of 100 (Routine)
Downieville	United States	Record daily snowfall	5.1 cm (2.0 in)	24 of 100 (Routine)

Counts by Type and Timescale

480 records

Records set or tied on 21 April 2007 by type: Highest daily maximum 99, Lowest daily maximum 67, Highest daily minimum 135, Lowest daily minimum 68, Heaviest daily rainfall 90, Heaviest daily snowfall 4, Deepest snow cover 17.

Records on 21 April 2007 by type
Record type	Records
Highest daily maximum	99
Lowest daily maximum	67
Highest daily minimum	135
Lowest daily minimum	68
Heaviest daily rainfall	90
Heaviest daily snowfall	4
Deepest snow cover	17

Records on 21 April 2007 by timescale: all-time 1, monthly 10, daily 469.

How Much Records Were Beaten By

359 broken records

Margins by which the 359 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 406.0. Ties are not counted.

Top 20 by Significance

21 April 2007

Top 20 records on 21 April 2007 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 2007	Gustavus, US	daily snow depth	35.6 cm (14.0 in)	30.5 cm (12.0 in)	58 years	65 of 100 (Major)
21 April 2007	Watertown Rgnl AP, US	daily rain	58.9 mm (2.3 in)	36.3 mm (1.4 in)	42 years	62 of 100 (Major)
21 April 2007	San Diego Curupatzeo, MX	daily low min	6.7 C (44.1 F)	5.0 C (9.0 F)	77 years	47 of 100 (Notable)
21 April 2007	Cooper Landing 5 W, US	daily rain	30.5 mm (1.2 in)	30.5 mm (1.2 in)	32 years	47 of 100 (Notable)
21 April 2007	Nemours (Ghazaouet), DZ	daily high min	16.0 C (60.8 F)	1.0 C (1.8 F)	113 years	44 of 100 (Notable)
21 April 2007	Colebrook 3SW, US	daily rain	37.6 mm (1.5 in)	21.9 mm (0.9 in)	16 years	41 of 100 (Notable)
21 April 2007	Milan, IT	daily high max	27.9 C (82.2 F)	0.5 C (0.9 F)	96 years	39 of 100 (Notable)
21 April 2007	Forman 5 SSE, US	daily rain	43.4 mm (1.7 in)	17.0 mm (0.7 in)	42 years	39 of 100 (Notable)
21 April 2007	Kadoka, US	daily high min	10.6 C (51.1 F)	1.7 C (3.1 F)	92 years	39 of 100 (Notable)
21 April 2007	Don Muang, TH	daily high min	29.4 C (84.9 F)	2.3 C (4.1 F)	56 years	37 of 100 (Notable)
21 April 2007	Erzurum, TR	daily low min	-16.2 C (2.8 F)	9.2 C (16.6 F)	29 years	37 of 100 (Notable)
21 April 2007	San Simon, US	daily low max	18.9 C (66.0 F)	3.3 C (5.9 F)	62 years	35 of 100 (Notable)
21 April 2007	Covelo, US	daily rain	26.9 mm (1.1 in)	6.3 mm (0.25 in)	58 years	34 of 100 (Routine)
21 April 2007	Placerville 3SE, US	daily snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	38 years	34 of 100 (Routine)
21 April 2007	Jackman, US	daily snow depth	71.1 cm (28.0 in)	40.6 cm (16.0 in)	28 years	34 of 100 (Routine)
21 April 2007	Anchorage Merrill Fld, US	daily high max	13.3 C (55.9 F)	0.5 C (0.9 F)	80 years	34 of 100 (Routine)
21 April 2007	Lake Crescent (Serat), AU	daily rain	25.8 mm (1.0 in)	2.9 mm (0.11 in)	81 years	33 of 100 (Routine)
21 April 2007	Downieville, US	daily rain	41.9 mm (1.6 in)	21.6 mm (0.9 in)	36 years	33 of 100 (Routine)
21 April 2007	Fargo Hector Intl AP, US	daily high min	13.3 C (55.9 F)	2.7 C (4.9 F)	60 years	33 of 100 (Routine)
21 April 2007	Los Reyes, MX	daily low min	1.7 C (35.1 F)	3.9 C (7.0 F)	44 years	32 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 2007

Records set or tied on this calendar date in each year from 1793 to 2007. 2007 had 480 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 2007-04-21: 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	352
100 to 200	4
200 to 300	1
300 to 400	1
400 to 500	1