Weather Records on 21 April 2009

983 weather records were set or tied worldwide on 21 April 2009. Highest significance: Schenley Lock 5, US.

Key Facts for 21 April 2009

On 21 April 2009, 983 weather records were set or tied at long-record stations worldwide.
550 were record highs and 233 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 60 monthly and 922 daily.
Schenley Lock 5 set a monthly record daily precipitation of 111.8 mm (4.4 in) on 21 April 2009.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 459 records.

Record Map

983 stations

983 station records on 21 April 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Schenley Lock 5	United States	Record daily precipitation	111.8 mm (4.4 in)	81 of 100 (Exceptional)
Watersmeet	United States	Record daily snowfall	31.0 cm (12.2 in)	73 of 100 (Major)
Nantucket Mem AP	United States	Record daily precipitation	64.8 mm (2.6 in)	63 of 100 (Major)
Port Macquarie (Bellevue Garde	Australia	Record daily precipitation	135.6 mm (5.3 in)	58 of 100 (Notable)
Sells	United States	Record high minimum temperature	26.1 C (79.0 F)	58 of 100 (Notable)
Alberta Ford For Ctr	United States	Record daily precipitation	48.0 mm (1.9 in)	57 of 100 (Notable)
Coconut Is 840.1	United States	Record daily precipitation	88.4 mm (3.5 in)	57 of 100 (Notable)
Comondu	Mexico	Record high minimum temperature	26.7 C (80.1 F)	53 of 100 (Notable)
Kendall Post Office	Australia	Record daily precipitation	111.6 mm (4.4 in)	52 of 100 (Notable)
Ironwood	United States	Record daily snowfall	20.3 cm (8.0 in)	52 of 100 (Notable)
Kaneohe 838.1	United States	Record daily precipitation	108.0 mm (4.3 in)	52 of 100 (Notable)
Hyannis	United States	Record daily precipitation	51.8 mm (2.0 in)	51 of 100 (Notable)
U C L A	United States	Record high minimum temperature	23.9 C (75.0 F)	50 of 100 (Notable)
Eagle Rvr	United States	Record daily snowfall	19.1 cm (7.5 in)	50 of 100 (Notable)
Hialeah	United States	Record daily precipitation	135.4 mm (5.3 in)	49 of 100 (Notable)
Big Bay 1NW	United States	Record daily precipitation	48.0 mm (1.9 in)	49 of 100 (Notable)
Watersmeet	United States	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
St Germain	United States	Record daily snowfall	17.8 cm (7.0 in)	48 of 100 (Notable)
Jixi	China	Record daily precipitation	39.5 mm (1.6 in)	47 of 100 (Notable)
Big Bay 1NW	United States	Record daily snowfall	20.6 cm (8.1 in)	46 of 100 (Notable)
Waihee Vly 482	United States	Record daily precipitation	85.1 mm (3.4 in)	46 of 100 (Notable)
Rapa	French Polynesia	Record daily precipitation	120.9 mm (4.8 in)	45 of 100 (Notable)
Puyacatengo	Mexico	Record daily precipitation	111.3 mm (4.4 in)	44 of 100 (Notable)
Stockton Fire STN 4	United States	Record high maximum temperature	37.2 C (99.0 F)	44 of 100 (Notable)
Grand Portage	United States	Record low maximum temperature	2.2 C (36.0 F)	44 of 100 (Notable)
Pomona/Fairplex	United States	Record high maximum temperature	37.8 C (100.0 F)	43 of 100 (Notable)
Pomona/Fairplex	United States	Record high minimum temperature	14.4 C (57.9 F)	43 of 100 (Notable)
Santa Rosa	United States	Record high maximum temperature	33.9 C (93.0 F)	43 of 100 (Notable)
Sonoma	United States	Record high maximum temperature	32.8 C (91.0 F)	43 of 100 (Notable)
Healdsburg	United States	Record high maximum temperature	36.1 C (97.0 F)	42 of 100 (Notable)
Newburyport	United States	Record daily precipitation	32.3 mm (1.3 in)	42 of 100 (Notable)
Bergland Dam	United States	Record daily snowfall	15.7 cm (6.2 in)	42 of 100 (Notable)
Vancouver 4 NNE	United States	Record high maximum temperature	27.2 C (81.0 F)	42 of 100 (Notable)
Phelps	United States	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Dos Patrias	Mexico	Record daily precipitation	119.9 mm (4.7 in)	41 of 100 (Notable)
Gila Bend 2SE	United States	Record high maximum temperature	40.6 C (105.1 F)	41 of 100 (Notable)
Hood Rvr Exp STN	United States	Record high maximum temperature	30.0 C (86.0 F)	41 of 100 (Notable)
Marquette	United States	Record daily precipitation	40.6 mm (1.6 in)	41 of 100 (Notable)
San Cristobal	Mexico	Record low minimum temperature	1.7 C (35.1 F)	40 of 100 (Notable)
Santa Monica Pier	United States	Record high maximum temperature	32.8 C (91.0 F)	40 of 100 (Notable)
Great Falls 16St	United States	Record high maximum temperature	26.7 C (80.1 F)	40 of 100 (Notable)
Lindley 2N	United States	Record daily precipitation	33.3 mm (1.3 in)	40 of 100 (Notable)
S Bend AP	United States	Record low maximum temperature	6.1 C (43.0 F)	40 of 100 (Notable)
Graton	United States	Record high maximum temperature	35.0 C (95.0 F)	39 of 100 (Notable)
Raymondville	United States	Record low minimum temperature	7.2 C (45.0 F)	39 of 100 (Notable)
Lac Vieux Desert	United States	Record daily snowfall	20.3 cm (8.0 in)	39 of 100 (Notable)
Roseburg Rgnl AP	United States	Record high maximum temperature	29.4 C (84.9 F)	39 of 100 (Notable)
Livermore	United States	Record high maximum temperature	34.4 C (93.9 F)	38 of 100 (Notable)
Willows 6 W	United States	Record high maximum temperature	37.2 C (99.0 F)	38 of 100 (Notable)
Rhinelander	United States	Record snow depth	10.2 cm (4.0 in)	38 of 100 (Notable)
Waiehu Camp 484	United States	Record daily precipitation	52.1 mm (2.1 in)	38 of 100 (Notable)
Salem AP (McNary Field)	United States	Record high maximum temperature	27.2 C (81.0 F)	38 of 100 (Notable)
Auberry 2 NW	United States	Record high minimum temperature	18.9 C (66.0 F)	37 of 100 (Notable)
Kentfield	United States	Record high maximum temperature	32.2 C (90.0 F)	37 of 100 (Notable)
Flemingsburg 2 N	United States	Record daily precipitation	27.2 mm (1.1 in)	37 of 100 (Notable)
Koloko Rsvr 1137	United States	Record daily precipitation	61.7 mm (2.4 in)	37 of 100 (Notable)
Poset	Russia	Record daily precipitation	43.3 mm (1.7 in)	36 of 100 (Notable)
Los Gatos	United States	Record high maximum temperature	34.4 C (93.9 F)	36 of 100 (Notable)
Tejon Rancho	United States	Record high maximum temperature	35.6 C (96.1 F)	36 of 100 (Notable)
Oakland Intl AP	United States	Record high maximum temperature	30.0 C (86.0 F)	36 of 100 (Notable)

Counts by Type and Timescale

983 records

Records set or tied on 21 April 2009 by type: Highest daily maximum 372, Lowest daily maximum 125, Highest daily minimum 178, Lowest daily minimum 108, Heaviest daily rainfall 163, Heaviest daily snowfall 18, Deepest snow cover 19.

Records on 21 April 2009 by type
Record type	Records
Highest daily maximum	372
Lowest daily maximum	125
Highest daily minimum	178
Lowest daily minimum	108
Heaviest daily rainfall	163
Heaviest daily snowfall	18
Deepest snow cover	19

Records on 21 April 2009 by timescale: all-time 1, monthly 60, daily 922.

How Much Records Were Beaten By

747 broken records

Margins by which the 747 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 228.0. Ties are not counted.

Top 20 by Significance

21 April 2009

Top 20 records on 21 April 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 2009	Schenley Lock 5, US	monthly rain	111.8 mm (4.4 in)	44.0 mm (1.7 in)	71 years	81 of 100 (Exceptional)
21 April 2009	Watersmeet, US	daily snowfall	31.0 cm (12.2 in)	18.3 cm (7.2 in)	96 years	73 of 100 (Major)
21 April 2009	Nantucket Mem AP, US	daily rain	64.8 mm (2.6 in)	62.0 mm (2.4 in)	59 years	63 of 100 (Major)
21 April 2009	Port Macquarie (Bellevue Garde, AU	daily rain	135.6 mm (5.3 in)	41.6 mm (1.6 in)	166 years	58 of 100 (Notable)
21 April 2009	Sells, US	monthly high min	26.1 C (79.0 F)	5.0 C (9.0 F)	86 years	58 of 100 (Notable)
21 April 2009	Alberta Ford For Ctr, US	daily rain	48.0 mm (1.9 in)	34.0 mm (1.3 in)	40 years	57 of 100 (Notable)
21 April 2009	Coconut Is 840.1, US	daily rain	88.4 mm (3.5 in)	42.4 mm (1.7 in)	44 years	57 of 100 (Notable)
21 April 2009	Comondu, MX	daily high min	26.7 C (80.1 F)	7.8 C (14.0 F)	72 years	53 of 100 (Notable)
21 April 2009	Kendall Post Office, AU	daily rain	111.6 mm (4.4 in)	53.2 mm (2.1 in)	78 years	52 of 100 (Notable)
21 April 2009	Ironwood, US	daily snowfall	20.3 cm (8.0 in)	10.1 cm (4.0 in)	84 years	52 of 100 (Notable)
21 April 2009	Kaneohe 838.1, US	daily rain	108.0 mm (4.3 in)	82.9 mm (3.3 in)	7 years	52 of 100 (Notable)
21 April 2009	Hyannis, US	daily rain	51.8 mm (2.0 in)	13.4 mm (0.5 in)	115 years	51 of 100 (Notable)
21 April 2009	U C L A, US	daily high min	23.9 C (75.0 F)	7.2 C (13.0 F)	51 years	50 of 100 (Notable)
21 April 2009	Eagle Rvr, US	daily snowfall	19.1 cm (7.5 in)	16.1 cm (6.3 in)	43 years	50 of 100 (Notable)
21 April 2009	Hialeah, US	daily rain	135.4 mm (5.3 in)	102.6 mm (4.0 in)	32 years	49 of 100 (Notable)
21 April 2009	Big Bay 1NW, US	daily rain	48.0 mm (1.9 in)	30.2 mm (1.2 in)	22 years	49 of 100 (Notable)
21 April 2009	Watersmeet, US	daily rain	33.0 mm (1.3 in)	7.1 mm (0.28 in)	96 years	48 of 100 (Notable)
21 April 2009	St Germain, US	daily snowfall	17.8 cm (7.0 in)	17.8 cm (7.0 in)	36 years	48 of 100 (Notable)
21 April 2009	Jixi, CN	monthly rain	39.5 mm (1.6 in)	9.0 mm (0.35 in)	30 years	47 of 100 (Notable)
21 April 2009	Big Bay 1NW, US	daily snowfall	20.6 cm (8.1 in)	15.5 cm (6.1 in)	43 years	46 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 2009

Records set or tied on this calendar date in each year from 1793 to 2009. 2009 had 983 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 2009-04-21: 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	717
50 to 100	16
100 to 150	5
150 to 200	6
200 to 250	3