Weather Records on 15 May 2009

675 weather records were set or tied worldwide on 15 May 2009. Highest significance: Ter Apel, NL.

Key Facts for 15 May 2009

On 15 May 2009, 675 weather records were set or tied at long-record stations worldwide.
228 were record highs and 161 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 18 monthly and 653 daily.
Ter Apel set a daily record precipitation of 31.5 mm (1.2 in) on 15 May 2009.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 429 records.

Record Map

675 stations

675 station records on 15 May 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ter Apel	Netherlands	Record daily precipitation	31.5 mm (1.2 in)	72 of 100 (Major)
Akola	India	Record daily precipitation	37.1 mm (1.5 in)	71 of 100 (Major)
Armagh	United Kingdom	Record daily precipitation	61.0 mm (2.4 in)	71 of 100 (Major)
Allerton	United States	Record daily precipitation	39.9 mm (1.6 in)	59 of 100 (Notable)
Blokzijl	Netherlands	Record daily precipitation	30.3 mm (1.2 in)	58 of 100 (Notable)
Dronten	Netherlands	Record daily precipitation	33.4 mm (1.3 in)	57 of 100 (Notable)
La Harpe	United States	Record daily precipitation	57.9 mm (2.3 in)	57 of 100 (Notable)
Kirksville Rgnl AP	United States	Record daily precipitation	90.9 mm (3.6 in)	56 of 100 (Notable)
Burlington Muni AP	United States	Record daily precipitation	84.3 mm (3.3 in)	54 of 100 (Notable)
Zeehan (West Coast Pioneers Mu	Australia	Record daily precipitation	77.6 mm (3.1 in)	53 of 100 (Notable)
Boxian	China	Record daily precipitation	86.1 mm (3.4 in)	52 of 100 (Notable)
Lingen	Germany	Record daily precipitation	25.5 mm (1.0 in)	51 of 100 (Notable)
Seesen	Germany	Record daily precipitation	26.0 mm (1.0 in)	51 of 100 (Notable)
Diepholz	Germany	Record daily precipitation	28.7 mm (1.1 in)	51 of 100 (Notable)
Peuelitas	Mexico	Record daily precipitation	102.1 mm (4.0 in)	51 of 100 (Notable)
La Harpe	United States	Record daily snowfall	5.8 cm (2.3 in)	51 of 100 (Notable)
Cortazar	Mexico	Record daily precipitation	49.8 mm (2.0 in)	50 of 100 (Notable)
Gieterveen	Netherlands	Record daily precipitation	37.8 mm (1.5 in)	50 of 100 (Notable)
Strathgordon Village	Australia	Record daily precipitation	80.2 mm (3.2 in)	48 of 100 (Notable)
Marknesse_1	Netherlands	Record daily precipitation	28.0 mm (1.1 in)	48 of 100 (Notable)
Xuzhou	China	Record daily precipitation	95.8 mm (3.8 in)	47 of 100 (Notable)
Zumpango del Rio	Mexico	Record daily precipitation	29.5 mm (1.2 in)	46 of 100 (Notable)
Piaxtla	Mexico	Record daily precipitation	59.9 mm (2.4 in)	46 of 100 (Notable)
Dwingelo	Netherlands	Record daily precipitation	27.4 mm (1.1 in)	46 of 100 (Notable)
Savage River Mine	Australia	Record daily precipitation	60.0 mm (2.4 in)	45 of 100 (Notable)
Lacon	United States	Record daily precipitation	46.7 mm (1.8 in)	45 of 100 (Notable)
Sirte	Libya	Record high minimum temperature	25.0 C (77.0 F)	44 of 100 (Notable)
San Andres Lagunas	Mexico	Record daily precipitation	39.9 mm (1.6 in)	44 of 100 (Notable)
Heerde	Netherlands	Record daily precipitation	29.8 mm (1.2 in)	44 of 100 (Notable)
W Chester 2 NW	United States	Record daily precipitation	28.2 mm (1.1 in)	44 of 100 (Notable)
Cape Mele	Italy	Record daily precipitation	39.9 mm (1.6 in)	43 of 100 (Notable)
Bartow 1SE	United States	Record daily precipitation	93.0 mm (3.7 in)	42 of 100 (Notable)
Cradle Valley (Waldheim)	Australia	Record daily precipitation	79.4 mm (3.1 in)	41 of 100 (Notable)
Renison Bell	Australia	Record daily precipitation	97.0 mm (3.8 in)	41 of 100 (Notable)
Simao	China	Record daily precipitation	66.1 mm (2.6 in)	41 of 100 (Notable)
Spickard 7 W	United States	Record daily precipitation	74.9 mm (2.9 in)	41 of 100 (Notable)
Lancaster	United States	Record high minimum temperature	11.1 C (52.0 F)	41 of 100 (Notable)
Winston Salem Reynolds AP	United States	Record high minimum temperature	18.9 C (66.0 F)	41 of 100 (Notable)
Aculco (Smn)	Mexico	Record daily precipitation	35.8 mm (1.4 in)	40 of 100 (Notable)
Eext	Netherlands	Record daily precipitation	31.1 mm (1.2 in)	40 of 100 (Notable)
Ft Madison	United States	Record daily precipitation	55.9 mm (2.2 in)	40 of 100 (Notable)
Waratah (Mount Road)	Australia	Record daily precipitation	54.2 mm (2.1 in)	39 of 100 (Notable)
Macomb	United States	Record daily precipitation	50.8 mm (2.0 in)	39 of 100 (Notable)
Port Davey (Melaleuca)	Australia	Record daily precipitation	59.4 mm (2.3 in)	38 of 100 (Notable)
Loningen	Germany	Record daily precipitation	26.6 mm (1.0 in)	38 of 100 (Notable)
Tezontepec (Smn)	Mexico	Record high maximum temperature	38.9 C (102.0 F)	38 of 100 (Notable)
Galva	United States	Record daily precipitation	54.6 mm (2.1 in)	38 of 100 (Notable)
Assen	Netherlands	Record daily precipitation	29.0 mm (1.1 in)	37 of 100 (Notable)
Bramsche	Germany	Record daily precipitation	28.1 mm (1.1 in)	36 of 100 (Notable)
Cadereyta	Mexico	Record daily precipitation	37.8 mm (1.5 in)	36 of 100 (Notable)
Clifton	United States	Record high minimum temperature	22.8 C (73.0 F)	36 of 100 (Notable)
Hot Springs	United States	Record daily precipitation	49.8 mm (2.0 in)	36 of 100 (Notable)
Santa Rosa	Mexico	Record high maximum temperature	35.0 C (95.0 F)	35 of 100 (Notable)
Veendam	Netherlands	Record daily precipitation	35.0 mm (1.4 in)	35 of 100 (Notable)
Pozos	Mexico	Record daily precipitation	59.9 mm (2.4 in)	34 of 100 (Routine)
Laaghalen	Netherlands	Record daily precipitation	27.8 mm (1.1 in)	34 of 100 (Routine)
Lincoln	United States	Record daily precipitation	38.6 mm (1.5 in)	34 of 100 (Routine)
Morgantown	United States	Record daily precipitation	33.3 mm (1.3 in)	34 of 100 (Routine)
Olathe Johnson Co Ind AP	United States	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Nevado de Toluca	Mexico	Record daily precipitation	40.9 mm (1.6 in)	33 of 100 (Routine)

Counts by Type and Timescale

675 records

Records set or tied on 15 May 2009 by type: Highest daily maximum 65, Lowest daily maximum 72, Highest daily minimum 163, Lowest daily minimum 89, Heaviest daily rainfall 285, Heaviest daily snowfall 1.

Records on 15 May 2009 by type
Record type	Records
Highest daily maximum	65
Lowest daily maximum	72
Highest daily minimum	163
Lowest daily minimum	89
Heaviest daily rainfall	285
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 15 May 2009 by timescale: all-time 4, monthly 18, daily 653.

How Much Records Were Beaten By

525 broken records

Margins by which the 525 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 88.7. Ties are not counted.

Top 20 by Significance

15 May 2009

Top 20 records on 15 May 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 2009	Ter Apel, NL	daily rain	31.5 mm (1.2 in)	15.4 mm (0.6 in)	107 years	72 of 100 (Major)
15 May 2009	Akola, IN	daily rain	37.1 mm (1.5 in)	26.2 mm (1.0 in)	91 years	71 of 100 (Major)
15 May 2009	Armagh, GB	daily rain	61.0 mm (2.4 in)	42.5 mm (1.7 in)	71 years	71 of 100 (Major)
15 May 2009	Allerton, US	daily rain	39.9 mm (1.6 in)	26.4 mm (1.0 in)	100 years	59 of 100 (Notable)
15 May 2009	Blokzijl, NL	daily rain	30.3 mm (1.2 in)	18.2 mm (0.7 in)	56 years	58 of 100 (Notable)
15 May 2009	Dronten, NL	daily rain	33.4 mm (1.3 in)	21.7 mm (0.9 in)	40 years	57 of 100 (Notable)
15 May 2009	La Harpe, US	daily rain	57.9 mm (2.3 in)	28.4 mm (1.1 in)	80 years	57 of 100 (Notable)
15 May 2009	Kirksville Rgnl AP, US	daily rain	90.9 mm (3.6 in)	52.0 mm (2.0 in)	46 years	56 of 100 (Notable)
15 May 2009	Burlington Muni AP, US	monthly rain	84.3 mm (3.3 in)	9.6 mm (0.38 in)	89 years	54 of 100 (Notable)
15 May 2009	Zeehan (West Coast Pioneers Mu, AU	daily rain	77.6 mm (3.1 in)	46.6 mm (1.8 in)	36 years	53 of 100 (Notable)
15 May 2009	Boxian, CN	daily rain	86.1 mm (3.4 in)	75.5 mm (3.0 in)	24 years	52 of 100 (Notable)
15 May 2009	Lingen, DE	daily rain	25.5 mm (1.0 in)	11.1 mm (0.4 in)	74 years	51 of 100 (Notable)
15 May 2009	Seesen, DE	daily rain	26.0 mm (1.0 in)	15.6 mm (0.6 in)	72 years	51 of 100 (Notable)
15 May 2009	Diepholz, DE	daily rain	28.7 mm (1.1 in)	16.8 mm (0.7 in)	40 years	51 of 100 (Notable)
15 May 2009	Peuelitas, MX	all-time rain	102.1 mm (4.0 in)	24.4 mm (1.0 in)	6 years	51 of 100 (Notable)
15 May 2009	La Harpe, US	monthly snowfall	5.8 cm (2.3 in)	2.0 cm (0.8 in)	92 years	51 of 100 (Notable)
15 May 2009	Cortazar, MX	daily rain	49.8 mm (2.0 in)	37.9 mm (1.5 in)	22 years	50 of 100 (Notable)
15 May 2009	Gieterveen, NL	daily rain	37.8 mm (1.5 in)	25.8 mm (1.0 in)	15 years	50 of 100 (Notable)
15 May 2009	Strathgordon Village, AU	daily rain	80.2 mm (3.2 in)	41.6 mm (1.6 in)	36 years	48 of 100 (Notable)
15 May 2009	Marknesse_1, NL	daily rain	28.0 mm (1.1 in)	23.5 mm (0.9 in)	8 years	48 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

1820 to 2009

Records set or tied on this calendar date in each year from 1820 to 2009. 2009 had 675 records.

Counts for years before the ledger starts come from the same station rules.

Records on 05-15 in each year
Year	Records
1820	1
1825	1
1831	1
1832	1
1837	2
1845	1
1847	2
1848	1
1855	2
1857	2
1859	1
1862	1
1863	1
1865	1
1866	2
1867	1
1868	2
1870	1
1871	3
1874	2
1876	4
1878	1
1879	2
1881	1
1883	1
1885	1
1886	2
1888	3
1891	3
1893	5
1894	2
1895	4
1896	2
1897	4
1898	3
1899	9
1900	9
1901	2
1902	9
1903	4
1904	13
1905	16
1906	10
1907	27
1908	25
1909	89
1910	27
1911	27
1912	26
1913	60
1914	16
1915	236
1916	27
1917	80
1918	133
1919	25
1920	58
1921	92
1922	30
1923	125
1924	174
1925	100
1926	161
1927	191
1928	144
1929	161
1930	136
1931	459
1932	368
1933	439
1934	227
1935	288
1936	372
1937	373
1938	393
1939	351
1940	179
1941	454
1942	701
1943	568
1944	630
1945	588
1946	238
1947	334
1948	264
1949	363
1950	260
1951	736
1952	476
1953	426
1954	355
1955	538
1956	466
1957	521
1958	605
1959	764
1960	291
1961	508
1962	1,128
1963	782
1964	347
1965	320
1966	389
1967	609
1968	1,019
1969	790
1970	512
1971	351
1972	484
1973	818
1974	1,230
1975	372
1976	803
1977	1,186
1978	922
1979	404
1980	625
1981	586
1982	500
1983	1,215
1984	1,059
1985	649
1986	679
1987	1,073
1988	643
1989	552
1990	776
1991	1,179
1992	944
1993	784
1994	910
1995	1,750
1996	1,452
1997	1,175
1998	1,641
1999	810
2000	850
2001	1,280
2002	801
2003	1,023
2004	1,046
2005	767
2006	955
2007	949
2008	995
2009	675
2010	1,088
2011	1,298
2012	751
2013	1,081
2014	1,411
2015	717
2016	890
2017	435
2018	1,074
2019	627
2020	472
2021	412
2022	847
2023	566
2024	596
2025	801
2026	481

Download the Data

Data for records on 2009-05-15: 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 20	489
20 to 40	29
40 to 60	5
60 to 80	1
80 to 100	1