Weather Records on 1 May 2009

679 weather records were set or tied worldwide on 1 May 2009. Highest significance: Armagh, GB.

Key Facts for 1 May 2009

On 1 May 2009, 679 weather records were set or tied at long-record stations worldwide.
382 were record highs and 155 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 40 monthly and 637 daily.
Armagh set a monthly record daily precipitation of 62.0 mm (2.4 in) on 1 May 2009.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 441 records.

Record Map

679 stations

679 station records on 1 May 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Armagh	United Kingdom	Record daily precipitation	62.0 mm (2.4 in)	90 of 100 (Exceptional)
Dickson	United States	Record daily precipitation	104.1 mm (4.1 in)	62 of 100 (Major)
Athens	United States	Record daily precipitation	108.5 mm (4.3 in)	61 of 100 (Major)
Motozintla (Smn)	Mexico	Record high maximum temperature	38.3 C (100.9 F)	55 of 100 (Notable)
Kenton	United States	Record daily precipitation	58.4 mm (2.3 in)	54 of 100 (Notable)
Lakeview	United States	Record daily precipitation	68.6 mm (2.7 in)	53 of 100 (Notable)
Finca la Soledad	Mexico	Record daily precipitation	50.8 mm (2.0 in)	52 of 100 (Notable)
Holter Dam	United States	Record snow depth	12.7 cm (5.0 in)	52 of 100 (Notable)
Tubuai	French Polynesia	Record daily precipitation	71.9 mm (2.8 in)	48 of 100 (Notable)
Valier	United States	Record snow depth	30.5 cm (12.0 in)	45 of 100 (Notable)
Cassville 1 NE	United States	Record daily precipitation	97.3 mm (3.8 in)	44 of 100 (Notable)
Makaweli 965	United States	Record low maximum temperature	25.6 C (78.1 F)	44 of 100 (Notable)
Nenastnaja	Russia	Record daily precipitation	54.9 mm (2.2 in)	43 of 100 (Notable)
Cascade 5 S	United States	Record snow depth	20.3 cm (8.0 in)	42 of 100 (Notable)
Lourdes	France	Record daily precipitation	61.0 mm (2.4 in)	41 of 100 (Notable)
Coshocton Wpc Plt	United States	Record daily precipitation	27.2 mm (1.1 in)	41 of 100 (Notable)
Sanderson	United States	Record high minimum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Nashville Intl AP	United States	Record daily precipitation	75.2 mm (3.0 in)	41 of 100 (Notable)
Huntsville Intnl AP	United States	Record daily precipitation	105.4 mm (4.1 in)	40 of 100 (Notable)
Tuba City	United States	Record low minimum temperature	-6.1 C (21.0 F)	39 of 100 (Notable)
Cascade 5 S	United States	Record low minimum temperature	-13.3 C (8.1 F)	39 of 100 (Notable)
Presa El Bosque (Cfe)	Mexico	Record low minimum temperature	7.8 C (46.0 F)	38 of 100 (Notable)
Ignasino	Russia	Record daily precipitation	30.0 mm (1.2 in)	38 of 100 (Notable)
Portland 1 SW	United States	Record daily precipitation	64.0 mm (2.5 in)	38 of 100 (Notable)
Tulsa Intl AP	United States	Record daily precipitation	76.5 mm (3.0 in)	38 of 100 (Notable)
Motozintla (Smn)	Mexico	Record low minimum temperature	8.9 C (48.0 F)	37 of 100 (Notable)
Rio Grande (Smn)	Mexico	Record high minimum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Choteau	United States	Record snow depth	30.5 cm (12.0 in)	37 of 100 (Notable)
Seaside	United States	Record high minimum temperature	13.9 C (57.0 F)	37 of 100 (Notable)
Great Falls AP	United States	Record low minimum temperature	-11.1 C (12.0 F)	37 of 100 (Notable)
Jasso	Mexico	Record low minimum temperature	0.0 C (32.0 F)	36 of 100 (Notable)
Ixtepeji	Mexico	Record daily precipitation	40.9 mm (1.6 in)	36 of 100 (Notable)
Hull	United Kingdom	Record high minimum temperature	10.3 C (50.5 F)	36 of 100 (Notable)
Sheffield	United Kingdom	Record high minimum temperature	11.0 C (51.8 F)	36 of 100 (Notable)
Buxton	United Kingdom	Record high minimum temperature	9.9 C (49.8 F)	36 of 100 (Notable)
Camp Pardee	United States	Record daily precipitation	27.4 mm (1.1 in)	36 of 100 (Notable)
Dinosaur Nm-Quarry Area	United States	Record high minimum temperature	11.1 C (52.0 F)	36 of 100 (Notable)
North Lakhimpur	India	Record daily precipitation	95.0 mm (3.7 in)	35 of 100 (Notable)
Circle Hot Springs	United States	Record high maximum temperature	21.7 C (71.1 F)	35 of 100 (Notable)
Haines AP	United States	Record high maximum temperature	20.6 C (69.1 F)	35 of 100 (Notable)
Wrangell AP	United States	Record high maximum temperature	21.1 C (70.0 F)	34 of 100 (Routine)
Great Falls AP	United States	Record snow depth	30.5 cm (12.0 in)	34 of 100 (Routine)
Comondu	Mexico	Record high maximum temperature	42.8 C (109.0 F)	33 of 100 (Routine)
Olmsted L&D	United States	Record daily precipitation	42.7 mm (1.7 in)	33 of 100 (Routine)
Cascade 20 SSE	United States	Record low minimum temperature	-11.7 C (10.9 F)	33 of 100 (Routine)
Jackson 3 NW	United States	Record high minimum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Blue Canyon Nyack AP	United States	Record daily precipitation	75.7 mm (3.0 in)	33 of 100 (Routine)
Nhulunbuy Dtw	Australia	Record daily precipitation	53.0 mm (2.1 in)	32 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record high maximum temperature	16.0 C (60.8 F)	32 of 100 (Routine)
Big Creek Ph 1	United States	Record daily precipitation	25.4 mm (1.0 in)	32 of 100 (Routine)
Torrevieja	Spain	Record high minimum temperature	19.0 C (66.2 F)	31 of 100 (Routine)
Gadsden	United States	Record daily precipitation	88.9 mm (3.5 in)	31 of 100 (Routine)
Qulin	United States	Record daily precipitation	101.6 mm (4.0 in)	31 of 100 (Routine)
Sun Rvr 4 S	United States	Record snow depth	12.7 cm (5.0 in)	31 of 100 (Routine)
Rapa	French Polynesia	Record daily precipitation	269.0 mm (10.6 in)	30 of 100 (Routine)
Zacatecas (Dge)	Mexico	Record low maximum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Sikeston Pwr STN	United States	Record daily precipitation	89.2 mm (3.5 in)	30 of 100 (Routine)
Corvallis Water Bureau	United States	Record low minimum temperature	-2.2 C (28.0 F)	30 of 100 (Routine)
Breckenridge	United States	Record high minimum temperature	22.2 C (72.0 F)	30 of 100 (Routine)
Kimchaek/Songjin	Korea, North	Record high minimum temperature	10.0 C (50.0 F)	29 of 100 (Routine)

Counts by Type and Timescale

679 records

Records set or tied on 1 May 2009 by type: Highest daily maximum 184, Lowest daily maximum 46, Highest daily minimum 198, Lowest daily minimum 109, Heaviest daily rainfall 122, Heaviest daily snowfall 4, Deepest snow cover 16.

Records on 1 May 2009 by type
Record type	Records
Highest daily maximum	184
Lowest daily maximum	46
Highest daily minimum	198
Lowest daily minimum	109
Heaviest daily rainfall	122
Heaviest daily snowfall	4
Deepest snow cover	16

Records on 1 May 2009 by timescale: all-time 2, monthly 40, daily 637.

How Much Records Were Beaten By

475 broken records

Margins by which the 475 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 229.0. Ties are not counted.

Top 20 by Significance

1 May 2009

Top 20 records on 1 May 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 2009	Armagh, GB	monthly rain	62.0 mm (2.4 in)	17.8 mm (0.7 in)	143 years	90 of 100 (Exceptional)
1 May 2009	Dickson, US	daily rain	104.1 mm (4.1 in)	66.0 mm (2.6 in)	42 years	62 of 100 (Major)
1 May 2009	Athens, US	daily rain	108.5 mm (4.3 in)	87.9 mm (3.5 in)	52 years	61 of 100 (Major)
1 May 2009	Motozintla (Smn), MX	daily high max	38.3 C (100.9 F)	5.5 C (9.9 F)	76 years	55 of 100 (Notable)
1 May 2009	Kenton, US	daily rain	58.4 mm (2.3 in)	33.0 mm (1.3 in)	63 years	54 of 100 (Notable)
1 May 2009	Lakeview, US	daily rain	68.6 mm (2.7 in)	40.2 mm (1.6 in)	26 years	53 of 100 (Notable)
1 May 2009	Finca la Soledad, MX	daily rain	50.8 mm (2.0 in)	46.5 mm (1.8 in)	27 years	52 of 100 (Notable)
1 May 2009	Holter Dam, US	daily snow depth	12.7 cm (5.0 in)	12.7 cm (5.0 in)	106 years	52 of 100 (Notable)
1 May 2009	Tubuai, PF	daily rain	71.9 mm (2.8 in)	52.8 mm (2.1 in)	20 years	48 of 100 (Notable)
1 May 2009	Valier, US	daily snow depth	30.5 cm (12.0 in)	22.9 cm (9.0 in)	48 years	45 of 100 (Notable)
1 May 2009	Cassville 1 NE, US	daily rain	97.3 mm (3.8 in)	39.9 mm (1.6 in)	31 years	44 of 100 (Notable)
1 May 2009	Makaweli 965, US	daily low max	25.6 C (78.1 F)	0.5 C (0.9 F)	103 years	44 of 100 (Notable)
1 May 2009	Nenastnaja, RU	daily rain	54.9 mm (2.2 in)	12.6 mm (0.5 in)	70 years	43 of 100 (Notable)
1 May 2009	Cascade 5 S, US	monthly snow depth	20.3 cm (8.0 in)	5.1 cm (2.0 in)	58 years	42 of 100 (Notable)
1 May 2009	Lourdes, FR	daily rain	61.0 mm (2.4 in)	42.7 mm (1.7 in)	8 years	41 of 100 (Notable)
1 May 2009	Coshocton Wpc Plt, US	daily rain	27.2 mm (1.1 in)	1.0 mm (0.04 in)	100 years	41 of 100 (Notable)
1 May 2009	Sanderson, US	daily high min	18.3 C (64.9 F)	0.5 C (0.9 F)	108 years	41 of 100 (Notable)
1 May 2009	Nashville Intl AP, US	daily rain	75.2 mm (3.0 in)	31.8 mm (1.3 in)	47 years	41 of 100 (Notable)
1 May 2009	Huntsville Intnl AP, US	daily rain	105.4 mm (4.1 in)	48.2 mm (1.9 in)	24 years	40 of 100 (Notable)
1 May 2009	Tuba City, US	daily low min	-6.1 C (21.0 F)	0.5 C (0.9 F)	94 years	39 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

1795 to 2009

Records set or tied on this calendar date in each year from 1795 to 2009. 2009 had 679 records.

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

Records on 05-01 in each year
Year	Records
1795	1
1802	1
1804	1
1814	1
1818	1
1835	1
1836	1
1840	1
1846	2
1847	1
1850	1
1851	1
1857	1
1860	1
1861	1
1864	2
1865	1
1868	2
1872	1
1875	4
1878	2
1879	2
1880	3
1881	2
1884	1
1885	1
1886	2
1887	2
1888	2
1889	3
1890	2
1891	5
1892	6
1893	2
1894	5
1896	1
1897	4
1898	1
1899	8
1900	1
1901	5
1902	7
1903	9
1904	9
1905	13
1906	12
1907	31
1908	20
1909	49
1910	13
1911	22
1912	18
1913	54
1914	23
1915	27
1916	27
1917	37
1918	34
1919	150
1920	186
1921	41
1922	92
1923	64
1924	63
1925	118
1926	500
1927	125
1928	190
1929	142
1930	263
1931	537
1932	220
1933	706
1934	305
1935	276
1936	368
1937	218
1938	304
1939	227
1940	731
1941	333
1942	1,036
1943	526
1944	229
1945	350
1946	415
1947	655
1948	774
1949	405
1950	439
1951	894
1952	557
1953	917
1954	1,506
1955	772
1956	1,106
1957	359
1958	448
1959	764
1960	737
1961	588
1962	615
1963	704
1964	312
1965	360
1966	707
1967	948
1968	426
1969	429
1970	1,075
1971	444
1972	562
1973	841
1974	589
1975	286
1976	673
1977	545
1978	1,202
1979	612
1980	507
1981	1,265
1982	508
1983	1,423
1984	640
1985	789
1986	512
1987	1,098
1988	1,058
1989	949
1990	922
1991	633
1992	1,201
1993	1,101
1994	1,210
1995	1,365
1996	1,439
1997	804
1998	951
1999	932
2000	809
2001	1,106
2002	1,221
2003	964
2004	887
2005	1,320
2006	734
2007	857
2008	979
2009	679
2010	1,151
2011	716
2012	796
2013	976
2014	941
2015	550
2016	844
2017	1,163
2018	519
2019	788
2020	1,099
2021	834
2022	319
2023	912
2024	458
2025	430
2026	623

Download the Data

Data for records on 2009-05-01: 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	462
50 to 100	6
100 to 150	4
150 to 200	1
200 to 250	2