Weather Records on 1 May 2007

857 weather records were set or tied worldwide on 1 May 2007. Highest significance: Chumphon, TH.

Key Facts for 1 May 2007

On 1 May 2007, 857 weather records were set or tied at long-record stations worldwide.
572 were record highs and 142 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 32 monthly and 824 daily.
Chumphon set a monthly record daily precipitation of 163.3 mm (6.4 in) on 1 May 2007.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 440 records.

Record Map

857 stations

857 station records on 1 May 2007 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 2007: highest significance records shown on the map
Station	Country	Type	Value	Significance
Chumphon	Thailand	Record daily precipitation	163.3 mm (6.4 in)	71 of 100 (Major)
Hancock Exp Farm	United States	Record daily precipitation	55.9 mm (2.2 in)	66 of 100 (Major)
Beja	Portugal	Record daily precipitation	35.0 mm (1.4 in)	60 of 100 (Major)
Prachuap Khiri Khan	Thailand	Record daily precipitation	147.8 mm (5.8 in)	60 of 100 (Major)
Hua Hin	Thailand	Record daily precipitation	140.2 mm (5.5 in)	53 of 100 (Notable)
Chalk Mtn	United States	Record daily precipitation	91.7 mm (3.6 in)	53 of 100 (Notable)
Trojes	Mexico	Record daily precipitation	42.2 mm (1.7 in)	47 of 100 (Notable)
Bordeaux-Merignac	France	Record daily precipitation	48.4 mm (1.9 in)	46 of 100 (Notable)
Francisco I. Madero	Mexico	Record daily precipitation	43.9 mm (1.7 in)	46 of 100 (Notable)
Guipavas	France	Record daily precipitation	36.8 mm (1.4 in)	44 of 100 (Notable)
El Porvenir	Mexico	Record high maximum temperature	37.8 C (100.0 F)	43 of 100 (Notable)
Huejotzingo	Mexico	Record low minimum temperature	1.7 C (35.1 F)	43 of 100 (Notable)
Nikolaevsk-Na-Amure	Russia	Record high minimum temperature	1.6 C (34.9 F)	42 of 100 (Notable)
W Lafayette 6 NW	United States	Record high maximum temperature	31.7 C (89.1 F)	42 of 100 (Notable)
Centerville	United States	Record high minimum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Osceola	United States	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Atchison	United States	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Hernando	United States	Record high maximum temperature	32.8 C (91.0 F)	42 of 100 (Notable)
Mason City	United States	Record high minimum temperature	13.3 C (55.9 F)	42 of 100 (Notable)
Vandalia	United States	Record high maximum temperature	31.7 C (89.1 F)	41 of 100 (Notable)
Hampton	United States	Record high maximum temperature	31.7 C (89.1 F)	41 of 100 (Notable)
Maquoketa	United States	Record high maximum temperature	31.7 C (89.1 F)	41 of 100 (Notable)
Mason City	United States	Record high maximum temperature	32.2 C (90.0 F)	41 of 100 (Notable)
Toledo 3N	United States	Record high minimum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Roxboro 7 ESE	United States	Record high maximum temperature	32.2 C (90.0 F)	41 of 100 (Notable)
Elkhorn	United States	Record high maximum temperature	30.0 C (86.0 F)	41 of 100 (Notable)
Cedar Rapids #1	United States	Record high maximum temperature	32.2 C (90.0 F)	40 of 100 (Notable)
Versailles	United States	Record daily precipitation	103.4 mm (4.1 in)	40 of 100 (Notable)
Rocky Mt	United States	Record high maximum temperature	32.2 C (90.0 F)	40 of 100 (Notable)
Ladysmith 3W	United States	Record high maximum temperature	31.1 C (88.0 F)	40 of 100 (Notable)
Parker	United States	Record high minimum temperature	25.6 C (78.1 F)	39 of 100 (Notable)
Elliston	United States	Record high minimum temperature	8.3 C (46.9 F)	39 of 100 (Notable)
Riverdale	United States	Record daily precipitation	55.9 mm (2.2 in)	38 of 100 (Notable)
Ballinger 2 NW	United States	Record daily precipitation	86.9 mm (3.4 in)	38 of 100 (Notable)
Flora 5 NW	United States	Record high maximum temperature	32.2 C (90.0 F)	37 of 100 (Notable)
Brillion	United States	Record daily precipitation	34.0 mm (1.3 in)	37 of 100 (Notable)
Mundaring	Australia	Record daily precipitation	36.8 mm (1.4 in)	36 of 100 (Notable)
San Diego Curupatzeo	Mexico	Record low minimum temperature	10.0 C (50.0 F)	36 of 100 (Notable)
San Bernardino Lagunas	Mexico	Record daily precipitation	58.2 mm (2.3 in)	36 of 100 (Notable)
Boquilla Numero Uno	Mexico	Record daily precipitation	48.8 mm (1.9 in)	35 of 100 (Notable)
San Felipe	Mexico	Record high minimum temperature	31.1 C (88.0 F)	35 of 100 (Notable)
Gyshgy	Turkmenistan	Record high maximum temperature	39.4 C (102.9 F)	35 of 100 (Notable)
Quartzsite	United States	Record high minimum temperature	23.3 C (73.9 F)	35 of 100 (Notable)
Hazlehurst	United States	Record high maximum temperature	32.8 C (91.0 F)	35 of 100 (Notable)
Effingham 3SW	United States	Record high maximum temperature	31.7 C (89.1 F)	35 of 100 (Notable)
Lybrook	United States	Record daily precipitation	27.9 mm (1.1 in)	35 of 100 (Notable)
Castle Dale	United States	Record high minimum temperature	11.1 C (52.0 F)	35 of 100 (Notable)
Collie	Australia	Record daily precipitation	31.5 mm (1.2 in)	34 of 100 (Routine)
Pte de la Hague	France	Record high minimum temperature	11.3 C (52.3 F)	34 of 100 (Routine)
Marshalltown	United States	Record high minimum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Montague 4 NW	United States	Record daily precipitation	29.2 mm (1.1 in)	34 of 100 (Routine)
High Pt	United States	Record high maximum temperature	34.4 C (93.9 F)	34 of 100 (Routine)
Fossil	United States	Record high minimum temperature	12.2 C (54.0 F)	34 of 100 (Routine)
Black Rvr Falls Sewage	United States	Record daily precipitation	33.5 mm (1.3 in)	34 of 100 (Routine)
Alta 1 NNW	United States	Record high minimum temperature	7.8 C (46.0 F)	34 of 100 (Routine)
Vasilevici	Belarus	Record low minimum temperature	-2.8 C (27.0 F)	33 of 100 (Routine)
Colstrip	United States	Record high minimum temperature	10.6 C (51.1 F)	33 of 100 (Routine)
Samarkand	Uzbekistan	Record high maximum temperature	34.1 C (93.4 F)	33 of 100 (Routine)
Vista	United States	Record low minimum temperature	0.6 C (33.1 F)	32 of 100 (Routine)
Wisconsin Rapids	United States	Record daily precipitation	37.3 mm (1.5 in)	32 of 100 (Routine)

Counts by Type and Timescale

857 records

Records set or tied on 1 May 2007 by type: Highest daily maximum 311, Lowest daily maximum 66, Highest daily minimum 261, Lowest daily minimum 76, Heaviest daily rainfall 140, Heaviest daily snowfall 1, Deepest snow cover 2.

Records on 1 May 2007 by type
Record type	Records
Highest daily maximum	311
Lowest daily maximum	66
Highest daily minimum	261
Lowest daily minimum	76
Heaviest daily rainfall	140
Heaviest daily snowfall	1
Deepest snow cover	2

Records on 1 May 2007 by timescale: all-time 1, monthly 32, daily 824.

How Much Records Were Beaten By

613 broken records

Margins by which the 613 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 86.2. Ties are not counted.

Top 20 by Significance

1 May 2007

Top 20 records on 1 May 2007 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 2007	Chumphon, TH	monthly rain	163.3 mm (6.4 in)	79.9 mm (3.1 in)	53 years	71 of 100 (Major)
1 May 2007	Hancock Exp Farm, US	daily rain	55.9 mm (2.2 in)	33.3 mm (1.3 in)	88 years	66 of 100 (Major)
1 May 2007	Beja, PT	daily rain	35.0 mm (1.4 in)	25.6 mm (1.0 in)	46 years	60 of 100 (Major)
1 May 2007	Prachuap Khiri Khan, TH	daily rain	147.8 mm (5.8 in)	67.3 mm (2.6 in)	52 years	60 of 100 (Major)
1 May 2007	Hua Hin, TH	daily rain	140.2 mm (5.5 in)	86.2 mm (3.4 in)	29 years	53 of 100 (Notable)
1 May 2007	Chalk Mtn, US	daily rain	91.7 mm (3.6 in)	65.3 mm (2.6 in)	40 years	53 of 100 (Notable)
1 May 2007	Trojes, MX	daily rain	42.2 mm (1.7 in)	33.8 mm (1.3 in)	16 years	47 of 100 (Notable)
1 May 2007	Bordeaux-Merignac, FR	daily rain	48.4 mm (1.9 in)	18.9 mm (0.7 in)	22 years	46 of 100 (Notable)
1 May 2007	Francisco I. Madero, MX	daily rain	43.9 mm (1.7 in)	32.0 mm (1.3 in)	29 years	46 of 100 (Notable)
1 May 2007	Guipavas, FR	daily rain	36.8 mm (1.4 in)	20.8 mm (0.8 in)	24 years	44 of 100 (Notable)
1 May 2007	El Porvenir, MX	monthly high max	37.8 C (100.0 F)	2.8 C (5.0 F)	37 years	43 of 100 (Notable)
1 May 2007	Huejotzingo, MX	daily low min	1.7 C (35.1 F)	3.9 C (7.0 F)	58 years	43 of 100 (Notable)
1 May 2007	Nikolaevsk-Na-Amure, RU	daily high min	1.6 C (34.9 F)	0.8 C (1.4 F)	111 years	42 of 100 (Notable)
1 May 2007	W Lafayette 6 NW, US	daily high max	31.7 C (89.1 F)	1.1 C (2.0 F)	105 years	42 of 100 (Notable)
1 May 2007	Centerville, US	daily high min	18.9 C (66.0 F)	1.1 C (2.0 F)	105 years	42 of 100 (Notable)
1 May 2007	Osceola, US	daily high min	17.8 C (64.0 F)	1.1 C (2.0 F)	111 years	42 of 100 (Notable)
1 May 2007	Atchison, US	daily high min	17.8 C (64.0 F)	1.1 C (2.0 F)	100 years	42 of 100 (Notable)
1 May 2007	Hernando, US	daily high max	32.8 C (91.0 F)	1.1 C (2.0 F)	105 years	42 of 100 (Notable)
1 May 2007	Mason City, US	daily high min	13.3 C (55.9 F)	1.1 C (2.0 F)	104 years	42 of 100 (Notable)
1 May 2007	Vandalia, US	daily high max	31.7 C (89.1 F)	0.6 C (1.1 F)	105 years	41 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 2007

Records set or tied on this calendar date in each year from 1795 to 2007. 2007 had 857 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 2007-05-01: 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 2026-10-16 (16 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	596
20 to 40	12
40 to 60	1
60 to 80	3
80 to 100	1