Weather Records on 12 May 2009

687 weather records were set or tied worldwide on 12 May 2009. Highest significance: Big Delta AP, US.

Key Facts for 12 May 2009

On 12 May 2009, 687 weather records were set or tied at long-record stations worldwide.
334 were record highs and 218 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 14 monthly and 671 daily.
Big Delta AP set a daily record precipitation of 26.2 mm (1.0 in) on 12 May 2009.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 451 records.

Record Map

687 stations

687 station records on 12 May 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Big Delta AP	United States	Record daily precipitation	26.2 mm (1.0 in)	55 of 100 (Notable)
Santa Maria (Dge)	Mexico	Record daily precipitation	32.3 mm (1.3 in)	54 of 100 (Notable)
Rottweil	Germany	Record daily precipitation	41.9 mm (1.6 in)	53 of 100 (Notable)
Aldan	Russia	Record daily precipitation	44.0 mm (1.7 in)	53 of 100 (Notable)
Tlaltenango Sanchez Roman	Mexico	Record daily precipitation	47.0 mm (1.9 in)	52 of 100 (Notable)
Farmerville	United States	Record low maximum temperature	17.2 C (63.0 F)	51 of 100 (Notable)
Val de Loire	France	Record daily precipitation	62.0 mm (2.4 in)	50 of 100 (Notable)
Mocksville 5SE	United States	Record low maximum temperature	13.3 C (55.9 F)	50 of 100 (Notable)
Wauchula	United States	Record daily precipitation	66.0 mm (2.6 in)	49 of 100 (Notable)
Camden 1	United States	Record low maximum temperature	16.1 C (61.0 F)	47 of 100 (Notable)
Kosrae	Federated States of Micronesia	Record daily precipitation	124.0 mm (4.9 in)	46 of 100 (Notable)
Prescott 2 NNW	United States	Record low maximum temperature	15.6 C (60.1 F)	46 of 100 (Notable)
Stamford 1	United States	Record low maximum temperature	19.4 C (66.9 F)	43 of 100 (Notable)
Bartow 1SE	United States	Record high maximum temperature	35.6 C (96.1 F)	42 of 100 (Notable)
Sparta 3.5 SSW	United States	Record daily precipitation	71.1 mm (2.8 in)	42 of 100 (Notable)
Elberton 2 N	United States	Record low maximum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Castolon	United States	Record daily precipitation	37.6 mm (1.5 in)	41 of 100 (Notable)
Lucinda Township	Australia	Record daily precipitation	62.0 mm (2.4 in)	40 of 100 (Notable)
Toluca (Obs)	Mexico	Record daily precipitation	57.7 mm (2.3 in)	40 of 100 (Notable)
Santa Rosa	Mexico	Record high maximum temperature	37.8 C (100.0 F)	40 of 100 (Notable)
Paradise	United States	Record high maximum temperature	32.8 C (91.0 F)	40 of 100 (Notable)
Batesville	United States	Record low maximum temperature	17.2 C (63.0 F)	40 of 100 (Notable)
Brinkley	United States	Record low maximum temperature	18.3 C (64.9 F)	39 of 100 (Notable)
Alkali Lake	United States	Record low minimum temperature	-15.6 C (3.9 F)	39 of 100 (Notable)
O O Rch	United States	Record low minimum temperature	-11.1 C (12.0 F)	39 of 100 (Notable)
Cheraw	United States	Record low maximum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
Castle Dale	United States	Record high minimum temperature	10.0 C (50.0 F)	39 of 100 (Notable)
Newport	United States	Record daily precipitation	25.1 mm (1.0 in)	39 of 100 (Notable)
Albemarle	United States	Record low maximum temperature	13.3 C (55.9 F)	38 of 100 (Notable)
Upper Sandusky	United States	Record low minimum temperature	-2.8 C (27.0 F)	38 of 100 (Notable)
Port Isabel	United States	Record high maximum temperature	33.9 C (93.0 F)	38 of 100 (Notable)
Danville 2 SE	United States	Record low maximum temperature	14.4 C (57.9 F)	37 of 100 (Notable)
Graz	Austria	Record daily precipitation	27.7 mm (1.1 in)	36 of 100 (Notable)
Jerecuaro	Mexico	Record high minimum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Desoto City 8 SW	United States	Record daily precipitation	48.0 mm (1.9 in)	36 of 100 (Notable)
Moore Haven Lock 1	United States	Record daily precipitation	26.9 mm (1.1 in)	36 of 100 (Notable)
Ft Green 12 WSW	United States	Record daily precipitation	87.1 mm (3.4 in)	35 of 100 (Notable)
University	United States	Record low maximum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Halifax Macrossan St	Australia	Record daily precipitation	40.4 mm (1.6 in)	34 of 100 (Routine)
Santo Tomas	Mexico	Record high maximum temperature	43.9 C (111.0 F)	34 of 100 (Routine)
Alum Fk	United States	Record low maximum temperature	15.0 C (59.0 F)	34 of 100 (Routine)
Enshi	China	Record daily precipitation	70.0 mm (2.8 in)	33 of 100 (Routine)
Ft Grant	United States	Record high minimum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Elk City 1NE	United States	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)
Alencon/Valframbert	France	Record daily precipitation	25.1 mm (1.0 in)	32 of 100 (Routine)
Taylor Park	United States	Record high minimum temperature	3.9 C (39.0 F)	32 of 100 (Routine)
Erick	United States	Record low maximum temperature	15.0 C (59.0 F)	32 of 100 (Routine)
Puntilla	United States	Record high minimum temperature	7.2 C (45.0 F)	32 of 100 (Routine)
Atlatlahuacan	Mexico	Record high minimum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Chicapa de Castro	Mexico	Record daily precipitation	45.0 mm (1.8 in)	31 of 100 (Routine)
Lees Ferry	United States	Record high minimum temperature	20.0 C (68.0 F)	31 of 100 (Routine)
Williams	United States	Record high minimum temperature	12.8 C (55.0 F)	31 of 100 (Routine)
Charleston	United States	Record low maximum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Shelby 2 NW	United States	Record low maximum temperature	15.6 C (60.1 F)	31 of 100 (Routine)
Trout Dale 3 SSE	United States	Record daily precipitation	53.3 mm (2.1 in)	31 of 100 (Routine)
Skwentna	United States	Record high minimum temperature	7.8 C (46.0 F)	31 of 100 (Routine)
Hersdorf-Weissenseifen	Germany	Record daily precipitation	29.1 mm (1.1 in)	30 of 100 (Routine)
Finca Hamburgo	Mexico	Record low maximum temperature	20.0 C (68.0 F)	30 of 100 (Routine)
Zitlaltepec	Mexico	Record daily precipitation	39.9 mm (1.6 in)	30 of 100 (Routine)
Hope 3 NE	United States	Record low maximum temperature	15.0 C (59.0 F)	30 of 100 (Routine)

Counts by Type and Timescale

687 records

Records set or tied on 12 May 2009 by type: Highest daily maximum 139, Lowest daily maximum 169, Highest daily minimum 195, Lowest daily minimum 49, Heaviest daily rainfall 130, Heaviest daily snowfall 5.

Records on 12 May 2009 by type
Record type	Records
Highest daily maximum	139
Lowest daily maximum	169
Highest daily minimum	195
Lowest daily minimum	49
Heaviest daily rainfall	130
Heaviest daily snowfall	5
Deepest snow cover	0

Records on 12 May 2009 by timescale: all-time 2, monthly 14, daily 671.

How Much Records Were Beaten By

473 broken records

Margins by which the 473 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.8. Ties are not counted.

Top 20 by Significance

12 May 2009

Top 20 records on 12 May 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 2009	Big Delta AP, US	daily rain	26.2 mm (1.0 in)	21.4 mm (0.8 in)	20 years	55 of 100 (Notable)
12 May 2009	Santa Maria (Dge), MX	daily rain	32.3 mm (1.3 in)	23.4 mm (0.9 in)	40 years	54 of 100 (Notable)
12 May 2009	Rottweil, DE	daily rain	41.9 mm (1.6 in)	24.8 mm (1.0 in)	32 years	53 of 100 (Notable)
12 May 2009	Aldan, RU	daily rain	44.0 mm (1.7 in)	20.6 mm (0.8 in)	27 years	53 of 100 (Notable)
12 May 2009	Tlaltenango Sanchez Roman, MX	monthly rain	47.0 mm (1.9 in)	16.0 mm (0.6 in)	37 years	52 of 100 (Notable)
12 May 2009	Farmerville, US	daily low max	17.2 C (63.0 F)	3.9 C (7.0 F)	106 years	51 of 100 (Notable)
12 May 2009	Val de Loire, FR	daily rain	62.0 mm (2.4 in)	26.9 mm (1.1 in)	24 years	50 of 100 (Notable)
12 May 2009	Mocksville 5SE, US	daily low max	13.3 C (55.9 F)	4.5 C (8.1 F)	113 years	50 of 100 (Notable)
12 May 2009	Wauchula, US	daily rain	66.0 mm (2.6 in)	36.0 mm (1.4 in)	75 years	49 of 100 (Notable)
12 May 2009	Camden 1, US	daily low max	16.1 C (61.0 F)	2.8 C (5.0 F)	117 years	47 of 100 (Notable)
12 May 2009	Kosrae, FM	daily rain	124.0 mm (4.9 in)	65.8 mm (2.6 in)	51 years	46 of 100 (Notable)
12 May 2009	Prescott 2 NNW, US	daily low max	15.6 C (60.1 F)	2.2 C (4.0 F)	117 years	46 of 100 (Notable)
12 May 2009	Stamford 1, US	daily low max	19.4 C (66.9 F)	2.8 C (5.0 F)	96 years	43 of 100 (Notable)
12 May 2009	Bartow 1SE, US	daily high max	35.6 C (96.1 F)	0.6 C (1.1 F)	109 years	42 of 100 (Notable)
12 May 2009	Sparta 3.5 SSW, US	daily rain	71.1 mm (2.8 in)	30.5 mm (1.2 in)	48 years	42 of 100 (Notable)
12 May 2009	Elberton 2 N, US	daily low max	19.4 C (66.9 F)	0.6 C (1.1 F)	102 years	41 of 100 (Notable)
12 May 2009	Castolon, US	daily rain	37.6 mm (1.5 in)	15.2 mm (0.6 in)	44 years	41 of 100 (Notable)
12 May 2009	Lucinda Township, AU	daily rain	62.0 mm (2.4 in)	29.0 mm (1.1 in)	52 years	40 of 100 (Notable)
12 May 2009	Toluca (Obs), MX	monthly rain	57.7 mm (2.3 in)	13.5 mm (0.5 in)	23 years	40 of 100 (Notable)
12 May 2009	Santa Rosa, MX	daily high max	37.8 C (100.0 F)	5.6 C (10.1 F)	48 years	40 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

1814 to 2009

Records set or tied on this calendar date in each year from 1814 to 2009. 2009 had 687 records.

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

Records on 05-12 in each year
Year	Records
1814	2
1823	1
1825	1
1827	1
1834	1
1837	1
1838	1
1845	1
1847	1
1848	1
1849	2
1851	1
1855	2
1860	2
1862	2
1863	1
1867	1
1868	1
1872	2
1874	1
1877	1
1878	1
1879	1
1881	4
1882	5
1884	3
1885	2
1886	3
1887	1
1888	1
1889	1
1890	1
1891	4
1894	1
1895	1
1896	1
1897	7
1898	3
1900	3
1901	6
1902	5
1903	7
1904	11
1905	10
1906	20
1907	53
1908	12
1909	4
1910	9
1911	37
1912	46
1913	6
1914	36
1915	50
1916	42
1917	54
1918	113
1919	42
1920	19
1921	64
1922	43
1923	109
1924	245
1925	275
1926	121
1927	167
1928	192
1929	172
1930	500
1931	350
1932	199
1933	476
1934	293
1935	404
1936	329
1937	214
1938	394
1939	233
1940	440
1941	568
1942	418
1943	803
1944	368
1945	389
1946	653
1947	286
1948	390
1949	414
1950	283
1951	427
1952	711
1953	891
1954	305
1955	265
1956	1,568
1957	454
1958	714
1959	740
1960	1,583
1961	381
1962	713
1963	777
1964	401
1965	196
1966	909
1967	810
1968	890
1969	506
1970	698
1971	668
1972	641
1973	393
1974	702
1975	418
1976	541
1977	855
1978	802
1979	763
1980	684
1981	855
1982	763
1983	1,281
1984	887
1985	1,199
1986	473
1987	1,295
1988	619
1989	856
1990	617
1991	1,177
1992	1,022
1993	1,208
1994	738
1995	1,190
1996	1,420
1997	921
1998	1,576
1999	881
2000	1,486
2001	1,015
2002	1,027
2003	861
2004	1,054
2005	1,369
2006	797
2007	630
2008	858
2009	687
2010	1,250
2011	1,119
2012	660
2013	689
2014	949
2015	958
2016	421
2017	529
2018	819
2019	784
2020	1,338
2021	712
2022	1,930
2023	429
2024	447
2025	940
2026	1,110

Download the Data

Data for records on 2009-05-12: 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 10	425
10 to 20	28
20 to 30	12
30 to 40	5
40 to 50	2
50 to 60	0
60 to 70	1