Weather Records on 1 May 2011

716 weather records were set or tied worldwide on 1 May 2011. Highest significance: El Rito, US.

Key Facts for 1 May 2011

On 1 May 2011, 716 weather records were set or tied at long-record stations worldwide.
267 were record highs and 244 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 69 monthly and 646 daily.
El Rito set a monthly record daily precipitation of 50.8 mm (2.0 in) on 1 May 2011.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 441 records.

Record Map

716 stations

716 station records on 1 May 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
El Rito	United States	Record daily precipitation	50.8 mm (2.0 in)	68 of 100 (Major)
Clarendon	United States	Record daily precipitation	114.3 mm (4.5 in)	67 of 100 (Major)
Abbott 1 SE	United States	Record daily snowfall	12.7 cm (5.0 in)	65 of 100 (Major)
Roy	United States	Record daily snowfall	12.7 cm (5.0 in)	65 of 100 (Major)
Lake Maumelle	United States	Record daily precipitation	186.4 mm (7.3 in)	57 of 100 (Notable)
Valmora	United States	Record daily snowfall	12.7 cm (5.0 in)	57 of 100 (Notable)
Cimarron 4 SW	United States	Record snow depth	12.7 cm (5.0 in)	52 of 100 (Notable)
Little Rock AP Adams Fld	United States	Record daily precipitation	100.8 mm (4.0 in)	52 of 100 (Notable)
Manassa	United States	Record low maximum temperature	1.7 C (35.1 F)	51 of 100 (Notable)
Mosquero 1 NE	United States	Record daily snowfall	10.2 cm (4.0 in)	50 of 100 (Notable)
Pasamonte	United States	Record daily snowfall	5.1 cm (2.0 in)	50 of 100 (Notable)
Kenmare 1 WSW	United States	Record daily snowfall	11.4 cm (4.5 in)	50 of 100 (Notable)
Chama	United States	Record low maximum temperature	0.6 C (33.1 F)	49 of 100 (Notable)
Belcourt Keya Radio	United States	Record daily precipitation	101.6 mm (4.0 in)	48 of 100 (Notable)
Bowbells	United States	Record daily snowfall	17.3 cm (6.8 in)	48 of 100 (Notable)
Maksatiha	Russia	Record daily precipitation	28.6 mm (1.1 in)	46 of 100 (Notable)
Cabot	United States	Record daily precipitation	136.4 mm (5.4 in)	45 of 100 (Notable)
Oceanside Marina	United States	Record high maximum temperature	25.6 C (78.1 F)	45 of 100 (Notable)
Grenville	United States	Record daily snowfall	10.2 cm (4.0 in)	44 of 100 (Notable)
Flatonia 4SE	United States	Record high minimum temperature	27.8 C (82.0 F)	44 of 100 (Notable)
Shawneetown Old Town	United States	Record daily precipitation	63.8 mm (2.5 in)	43 of 100 (Notable)
Paoli	United States	Record daily precipitation	86.6 mm (3.4 in)	43 of 100 (Notable)
Tierra Amarilla 4 N	United States	Record low maximum temperature	0.0 C (32.0 F)	43 of 100 (Notable)
Wildrose 3NW	United States	Record snow depth	22.9 cm (9.0 in)	43 of 100 (Notable)
Alum Fk	United States	Record daily precipitation	117.3 mm (4.6 in)	42 of 100 (Notable)
Wolf Canyon	United States	Record daily snowfall	27.9 cm (11.0 in)	42 of 100 (Notable)
Crosby	United States	Record snow depth	20.3 cm (8.0 in)	42 of 100 (Notable)
El Vado Dam	United States	Record daily snowfall	10.2 cm (4.0 in)	41 of 100 (Notable)
Brackettville	United States	Record high maximum temperature	37.2 C (99.0 F)	41 of 100 (Notable)
Fukaura	Japan	Record daily precipitation	57.2 mm (2.3 in)	40 of 100 (Notable)
Tarifa	Spain	Record daily precipitation	29.0 mm (1.1 in)	40 of 100 (Notable)
Hillsboro 3 N	United States	Record low maximum temperature	1.1 C (34.0 F)	40 of 100 (Notable)
Medora	United States	Record low maximum temperature	-1.1 C (30.0 F)	40 of 100 (Notable)
Ada	United States	Record low maximum temperature	0.6 C (33.1 F)	39 of 100 (Notable)
Cimarron 4 SW	United States	Record daily snowfall	12.7 cm (5.0 in)	39 of 100 (Notable)
Grenville	United States	Record snow depth	10.2 cm (4.0 in)	39 of 100 (Notable)
Medora	United States	Record daily snowfall	20.3 cm (8.0 in)	39 of 100 (Notable)
Ibapah	United States	Record low minimum temperature	-7.8 C (18.0 F)	39 of 100 (Notable)
Ketchikan AP	United States	Record low maximum temperature	6.1 C (43.0 F)	38 of 100 (Notable)
Newport Beach Harbor	United States	Record high maximum temperature	27.2 C (81.0 F)	37 of 100 (Notable)
Esashi	Japan	Record daily precipitation	39.1 mm (1.5 in)	36 of 100 (Notable)
Chiconautla	Mexico	Record daily precipitation	39.9 mm (1.6 in)	36 of 100 (Notable)
San Diego Curupatzeo	Mexico	Record low maximum temperature	30.6 C (87.1 F)	36 of 100 (Notable)
Aneityum	Vanuatu	Record daily precipitation	64.0 mm (2.5 in)	36 of 100 (Notable)
Ocate 2 NW	United States	Record daily snowfall	24.1 cm (9.5 in)	36 of 100 (Notable)
Hebbronville	United States	Record high maximum temperature	40.6 C (105.1 F)	36 of 100 (Notable)
Leadville Lake Co AP	United States	Record low maximum temperature	-4.3 C (24.3 F)	36 of 100 (Notable)
Galeana (Smn)	Mexico	Record high maximum temperature	35.0 C (95.0 F)	35 of 100 (Notable)
Dunn Ctr 1E	United States	Record low maximum temperature	-2.2 C (28.0 F)	35 of 100 (Notable)
Eagle Pass 3N	United States	Record high minimum temperature	23.3 C (73.9 F)	35 of 100 (Notable)
Delta	United States	Record low minimum temperature	-8.3 C (17.1 F)	35 of 100 (Notable)
Jaral de Berrios	Mexico	Record high maximum temperature	40.0 C (104.0 F)	34 of 100 (Routine)
Progreso	Mexico	Record high minimum temperature	25.0 C (77.0 F)	34 of 100 (Routine)
Des Arc	United States	Record daily precipitation	99.1 mm (3.9 in)	34 of 100 (Routine)
Crookston NW Exp STN	United States	Record daily snowfall	5.1 cm (2.0 in)	34 of 100 (Routine)
Watford City 14S	United States	Record daily snowfall	12.7 cm (5.0 in)	34 of 100 (Routine)
Smithville	United States	Record high minimum temperature	24.4 C (75.9 F)	34 of 100 (Routine)
Bondurant	United States	Record snow depth	50.8 cm (20.0 in)	34 of 100 (Routine)
Grand Junction Walker Fld	United States	Record low minimum temperature	-4.4 C (24.1 F)	34 of 100 (Routine)
Villa Insurgentes	Mexico	Record low minimum temperature	2.8 C (37.0 F)	33 of 100 (Routine)

Counts by Type and Timescale

716 records

Records set or tied on 1 May 2011 by type: Highest daily maximum 130, Lowest daily maximum 117, Highest daily minimum 137, Lowest daily minimum 127, Heaviest daily rainfall 122, Heaviest daily snowfall 44, Deepest snow cover 39.

Records on 1 May 2011 by type
Record type	Records
Highest daily maximum	130
Lowest daily maximum	117
Highest daily minimum	137
Lowest daily minimum	127
Heaviest daily rainfall	122
Heaviest daily snowfall	44
Deepest snow cover	39

Records on 1 May 2011 by timescale: all-time 1, monthly 69, daily 646.

How Much Records Were Beaten By

492 broken records

Margins by which the 492 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 482.0. Ties are not counted.

Top 20 by Significance

1 May 2011

Top 20 records on 1 May 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 2011	El Rito, US	monthly rain	50.8 mm (2.0 in)	14.0 mm (0.6 in)	81 years	68 of 100 (Major)
1 May 2011	Clarendon, US	daily rain	114.3 mm (4.5 in)	64.8 mm (2.6 in)	64 years	67 of 100 (Major)
1 May 2011	Abbott 1 SE, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	100 years	65 of 100 (Major)
1 May 2011	Roy, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	100 years	65 of 100 (Major)
1 May 2011	Lake Maumelle, US	all-time rain	186.4 mm (7.3 in)	28.9 mm (1.1 in)	53 years	57 of 100 (Notable)
1 May 2011	Valmora, US	monthly snowfall	12.7 cm (5.0 in)	5.1 cm (2.0 in)	93 years	57 of 100 (Notable)
1 May 2011	Cimarron 4 SW, US	daily snow depth	12.7 cm (5.0 in)	12.7 cm (5.0 in)	106 years	52 of 100 (Notable)
1 May 2011	Little Rock AP Adams Fld, US	daily rain	100.8 mm (4.0 in)	51.0 mm (2.0 in)	56 years	52 of 100 (Notable)
1 May 2011	Manassa, US	monthly low max	1.7 C (35.1 F)	0.5 C (0.9 F)	102 years	51 of 100 (Notable)
1 May 2011	Mosquero 1 NE, US	daily snowfall	10.2 cm (4.0 in)	9.2 cm (3.6 in)	81 years	50 of 100 (Notable)
1 May 2011	Pasamonte, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	100 years	50 of 100 (Notable)
1 May 2011	Kenmare 1 WSW, US	daily snowfall	11.4 cm (4.5 in)	11.4 cm (4.5 in)	69 years	50 of 100 (Notable)
1 May 2011	Chama, US	monthly low max	0.6 C (33.1 F)	0.5 C (0.9 F)	95 years	49 of 100 (Notable)
1 May 2011	Belcourt Keya Radio, US	daily rain	101.6 mm (4.0 in)	75.2 mm (3.0 in)	9 years	48 of 100 (Notable)
1 May 2011	Bowbells, US	monthly snowfall	17.3 cm (6.8 in)	9.7 cm (3.8 in)	31 years	48 of 100 (Notable)
1 May 2011	Maksatiha, RU	daily rain	28.6 mm (1.1 in)	18.4 mm (0.7 in)	25 years	46 of 100 (Notable)
1 May 2011	Cabot, US	daily rain	136.4 mm (5.4 in)	67.6 mm (2.7 in)	0 years	45 of 100 (Notable)
1 May 2011	Oceanside Marina, US	daily high max	25.6 C (78.1 F)	1.7 C (3.1 F)	92 years	45 of 100 (Notable)
1 May 2011	Grenville, US	monthly snowfall	10.2 cm (4.0 in)	5.1 cm (2.0 in)	56 years	44 of 100 (Notable)
1 May 2011	Flatonia 4SE, US	monthly high min	27.8 C (82.0 F)	0.6 C (1.1 F)	77 years	44 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 2011

Records set or tied on this calendar date in each year from 1795 to 2011. 2011 had 716 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	913
2024	458
2025	430
2026	623

Download the Data

Data for records on 2011-05-01: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 100	478
100 to 200	12
200 to 300	0
300 to 400	1
400 to 500	1