Weather Records on 20 April 2009

845 weather records were set or tied worldwide on 20 April 2009. Highest significance: Nowendoc (Beaufort), AU.

Key Facts for 20 April 2009

On 20 April 2009, 845 weather records were set or tied at long-record stations worldwide.
415 were record highs and 175 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 30 monthly and 814 daily.
Nowendoc (Beaufort) set a daily record precipitation of 44.0 mm (1.7 in) on 20 April 2009.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 460 records.

Record Map

845 stations

845 station records on 20 April 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nowendoc (Beaufort)	Australia	Record daily precipitation	44.0 mm (1.7 in)	61 of 100 (Major)
St-Girons	France	Record daily precipitation	50.8 mm (2.0 in)	52 of 100 (Notable)
Santa Cruz	United States	Record high maximum temperature	35.6 C (96.1 F)	51 of 100 (Notable)
Santa Ana Fire STN	United States	Record high maximum temperature	39.4 C (102.9 F)	50 of 100 (Notable)
El Campo	United States	Record daily precipitation	111.8 mm (4.4 in)	50 of 100 (Notable)
Motozintla (Smn)	Mexico	Record low minimum temperature	5.0 C (41.0 F)	47 of 100 (Notable)
Berkeley	United States	Record high minimum temperature	15.6 C (60.1 F)	47 of 100 (Notable)
Eagle Rvr	United States	Record daily snowfall	10.7 cm (4.2 in)	47 of 100 (Notable)
Kaneohe Bay MCAS	United States	Record daily precipitation	61.7 mm (2.4 in)	47 of 100 (Notable)
Simojovel (Dge)	Mexico	Record daily precipitation	50.3 mm (2.0 in)	45 of 100 (Notable)
Healdsburg	United States	Record high maximum temperature	35.6 C (96.1 F)	45 of 100 (Notable)
Kentfield	United States	Record high maximum temperature	34.4 C (93.9 F)	45 of 100 (Notable)
Alcozauca (Dge)	Mexico	Record daily precipitation	34.8 mm (1.4 in)	44 of 100 (Notable)
Chester	United States	Record daily precipitation	62.2 mm (2.4 in)	44 of 100 (Notable)
Tasiilaq	Greenland [Denmark]	Record daily precipitation	31.0 mm (1.2 in)	43 of 100 (Notable)
Tixtla (Dge)	Mexico	Record daily precipitation	27.4 mm (1.1 in)	43 of 100 (Notable)
Berkeley	United States	Record high maximum temperature	32.8 C (91.0 F)	43 of 100 (Notable)
Tilden 4 SSE	United States	Record daily precipitation	41.4 mm (1.6 in)	43 of 100 (Notable)
Phelps	United States	Record daily precipitation	25.1 mm (1.0 in)	43 of 100 (Notable)
San Francisco Dwtn	United States	Record high maximum temperature	33.9 C (93.0 F)	43 of 100 (Notable)
San Ildelfonso Villa Alta	Mexico	Record low minimum temperature	7.8 C (46.0 F)	42 of 100 (Notable)
Monticello	United States	Record daily precipitation	50.8 mm (2.0 in)	42 of 100 (Notable)
Chengshantou	China	Record daily precipitation	43.1 mm (1.7 in)	41 of 100 (Notable)
Oceanside Marina	United States	Record high maximum temperature	28.9 C (84.0 F)	41 of 100 (Notable)
Turlock #2	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Downieville	United States	Record high maximum temperature	31.7 C (89.1 F)	40 of 100 (Notable)
Rockefeller Wl Refuge	United States	Record daily precipitation	115.8 mm (4.6 in)	40 of 100 (Notable)
Tye Rvr 1 SE	United States	Record daily precipitation	41.1 mm (1.6 in)	40 of 100 (Notable)
Kailua 446	United States	Record low minimum temperature	10.6 C (51.1 F)	40 of 100 (Notable)
Laguardia AP	United States	Record daily precipitation	48.0 mm (1.9 in)	39 of 100 (Notable)
Galeana (Smn)	Mexico	Record low minimum temperature	5.0 C (41.0 F)	38 of 100 (Notable)
San Juan del Rio	Mexico	Record daily precipitation	80.0 mm (3.1 in)	38 of 100 (Notable)
Coweeta Exp STN	United States	Record daily precipitation	48.8 mm (1.9 in)	38 of 100 (Notable)
Casa Grande Nm	United States	Record high minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Ft Bragg 5 N	United States	Record high maximum temperature	23.9 C (75.0 F)	37 of 100 (Notable)
Elgin Water	United States	Record daily precipitation	40.6 mm (1.6 in)	37 of 100 (Notable)
San Francisco Dwtn	United States	Record high minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Belmont 2 SSE	United States	Record daily precipitation	36.8 mm (1.4 in)	36 of 100 (Notable)
Modesto AP	United States	Record high maximum temperature	36.1 C (97.0 F)	36 of 100 (Notable)
Taipak	Kazakhstan	Record low maximum temperature	5.2 C (41.4 F)	35 of 100 (Notable)
Livermore	United States	Record high maximum temperature	34.4 C (93.9 F)	35 of 100 (Notable)
San Luis Obispo Poly	United States	Record high maximum temperature	36.1 C (97.0 F)	35 of 100 (Notable)
Santa Monica Pier	United States	Record high maximum temperature	30.0 C (86.0 F)	35 of 100 (Notable)
Toccoa	United States	Record daily precipitation	43.9 mm (1.7 in)	35 of 100 (Notable)
Grand Marais	United States	Record daily snowfall	10.2 cm (4.0 in)	35 of 100 (Notable)
Montgomery	United States	Record daily precipitation	93.5 mm (3.7 in)	35 of 100 (Notable)
Sacramento 5 ESE	United States	Record high maximum temperature	34.4 C (93.9 F)	35 of 100 (Notable)
Nome AP	United States	Record snow depth	142.2 cm (56.0 in)	35 of 100 (Notable)
Actopan	Mexico	Record low maximum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Los Gatos	United States	Record high maximum temperature	34.4 C (93.9 F)	34 of 100 (Routine)
Gunflint Lake 10 NW	United States	Record daily snowfall	10.2 cm (4.0 in)	34 of 100 (Routine)
Valier	United States	Record high minimum temperature	7.2 C (45.0 F)	34 of 100 (Routine)
Ocozocoautla	Mexico	Record low maximum temperature	19.4 C (66.9 F)	33 of 100 (Routine)
San Jose Valle	Mexico	Record low maximum temperature	25.6 C (78.1 F)	33 of 100 (Routine)
Jonuta	Mexico	Record daily precipitation	38.9 mm (1.5 in)	33 of 100 (Routine)
Weaverville	United States	Record high maximum temperature	33.3 C (91.9 F)	33 of 100 (Routine)
Blue Canyon Nyack AP	United States	Record high minimum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Shenyang	China	Record daily precipitation	36.8 mm (1.4 in)	32 of 100 (Routine)
Benxi	China	Record daily precipitation	46.2 mm (1.8 in)	32 of 100 (Routine)
Uralsk	Kazakhstan	Record low maximum temperature	2.9 C (37.2 F)	32 of 100 (Routine)

Counts by Type and Timescale

845 records

Records set or tied on 20 April 2009 by type: Highest daily maximum 276, Lowest daily maximum 102, Highest daily minimum 139, Lowest daily minimum 73, Heaviest daily rainfall 229, Heaviest daily snowfall 11, Deepest snow cover 15.

Records on 20 April 2009 by type
Record type	Records
Highest daily maximum	276
Lowest daily maximum	102
Highest daily minimum	139
Lowest daily minimum	73
Heaviest daily rainfall	229
Heaviest daily snowfall	11
Deepest snow cover	15

Records on 20 April 2009 by timescale: all-time 1, monthly 30, daily 814.

How Much Records Were Beaten By

671 broken records

Margins by which the 671 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 330.0. Ties are not counted.

Top 20 by Significance

20 April 2009

Top 20 records on 20 April 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 2009	Nowendoc (Beaufort), AU	daily rain	44.0 mm (1.7 in)	21.6 mm (0.9 in)	116 years	61 of 100 (Major)
20 April 2009	St-Girons, FR	daily rain	50.8 mm (2.0 in)	23.8 mm (0.9 in)	46 years	52 of 100 (Notable)
20 April 2009	Santa Cruz, US	monthly high max	35.6 C (96.1 F)	0.6 C (1.1 F)	111 years	51 of 100 (Notable)
20 April 2009	Santa Ana Fire STN, US	daily high max	39.4 C (102.9 F)	6.6 C (11.9 F)	87 years	50 of 100 (Notable)
20 April 2009	El Campo, US	monthly rain	111.8 mm (4.4 in)	38.1 mm (1.5 in)	35 years	50 of 100 (Notable)
20 April 2009	Motozintla (Smn), MX	daily low min	5.0 C (41.0 F)	3.9 C (7.0 F)	84 years	47 of 100 (Notable)
20 April 2009	Berkeley, US	daily high min	15.6 C (60.1 F)	1.7 C (3.1 F)	103 years	47 of 100 (Notable)
20 April 2009	Eagle Rvr, US	daily snowfall	10.7 cm (4.2 in)	10.7 cm (4.2 in)	68 years	47 of 100 (Notable)
20 April 2009	Kaneohe Bay MCAS, US	daily rain	61.7 mm (2.4 in)	38.8 mm (1.5 in)	31 years	47 of 100 (Notable)
20 April 2009	Simojovel (Dge), MX	daily rain	50.3 mm (2.0 in)	38.4 mm (1.5 in)	40 years	45 of 100 (Notable)
20 April 2009	Healdsburg, US	daily high max	35.6 C (96.1 F)	2.8 C (5.0 F)	109 years	45 of 100 (Notable)
20 April 2009	Kentfield, US	daily high max	34.4 C (93.9 F)	3.8 C (6.8 F)	91 years	45 of 100 (Notable)
20 April 2009	Alcozauca (Dge), MX	daily rain	34.8 mm (1.4 in)	31.0 mm (1.2 in)	22 years	44 of 100 (Notable)
20 April 2009	Chester, US	daily rain	62.2 mm (2.4 in)	26.9 mm (1.1 in)	40 years	44 of 100 (Notable)
20 April 2009	Tasiilaq, GL	daily rain	31.0 mm (1.2 in)	11.4 mm (0.4 in)	60 years	43 of 100 (Notable)
20 April 2009	Tixtla (Dge), MX	daily rain	27.4 mm (1.1 in)	23.6 mm (0.9 in)	22 years	43 of 100 (Notable)
20 April 2009	Berkeley, US	daily high max	32.8 C (91.0 F)	3.9 C (7.0 F)	78 years	43 of 100 (Notable)
20 April 2009	Tilden 4 SSE, US	daily rain	41.4 mm (1.6 in)	23.6 mm (0.9 in)	50 years	43 of 100 (Notable)
20 April 2009	Phelps, US	daily rain	25.1 mm (1.0 in)	4.8 mm (0.19 in)	92 years	43 of 100 (Notable)
20 April 2009	San Francisco Dwtn, US	daily high max	33.9 C (93.0 F)	5.0 C (9.0 F)	78 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

1807 to 2009

Records set or tied on this calendar date in each year from 1807 to 2009. 2009 had 845 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 2009-04-20: 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 50	658
50 to 100	3
100 to 150	5
150 to 200	2
200 to 250	0
250 to 300	2
300 to 350	1