Weather Records on 1 May 1991

633 weather records were set or tied worldwide on 1 May 1991. Highest significance: Pogranichnoe, RU.

Key Facts for 1 May 1991

On 1 May 1991, 633 weather records were set or tied at long-record stations worldwide.
217 were record highs and 174 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 35 monthly and 596 daily.
Pogranichnoe set a daily record precipitation of 51.9 mm (2.0 in) on 1 May 1991.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 441 records.

Record Map

633 stations

633 station records on 1 May 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Pogranichnoe	Russia	Record daily precipitation	51.9 mm (2.0 in)	52 of 100 (Notable)
Gorjacij Kljuc	Russia	Record daily precipitation	37.8 mm (1.5 in)	48 of 100 (Notable)
Deseret	United States	Record low minimum temperature	-11.1 C (12.0 F)	48 of 100 (Notable)
Mae Sariang	Thailand	Record daily precipitation	84.1 mm (3.3 in)	47 of 100 (Notable)
Norrveda	Sweden	Record daily precipitation	32.8 mm (1.3 in)	46 of 100 (Notable)
Kingstree	United States	Record daily precipitation	63.5 mm (2.5 in)	45 of 100 (Notable)
Poronajsk	Russia	Record daily precipitation	38.4 mm (1.5 in)	41 of 100 (Notable)
Nahunta 6NE	United States	Record daily precipitation	69.3 mm (2.7 in)	41 of 100 (Notable)
Berlin 5 S	United States	Record daily precipitation	45.7 mm (1.8 in)	41 of 100 (Notable)
Tarbes - Ossun	France	Record daily precipitation	29.2 mm (1.1 in)	40 of 100 (Notable)
Soldier Summit	United States	Record low minimum temperature	-15.6 C (3.9 F)	40 of 100 (Notable)
Grafton	United States	Record low maximum temperature	2.8 C (37.0 F)	37 of 100 (Notable)
Senador Pompeu	Brazil	Record daily precipitation	52.8 mm (2.1 in)	36 of 100 (Notable)
Deqen	China	Record daily precipitation	33.2 mm (1.3 in)	36 of 100 (Notable)
Petersham 3 N	United States	Record daily precipitation	32.0 mm (1.3 in)	36 of 100 (Notable)
Crookston NW Exp STN	United States	Record low maximum temperature	0.6 C (33.1 F)	35 of 100 (Notable)
Kinston 7 SE	United States	Record high minimum temperature	19.4 C (66.9 F)	35 of 100 (Notable)
Greenwood	United States	Record high minimum temperature	18.3 C (64.9 F)	35 of 100 (Notable)
Santuck	United States	Record high minimum temperature	18.3 C (64.9 F)	35 of 100 (Notable)
Winnsboro	United States	Record high minimum temperature	19.4 C (66.9 F)	35 of 100 (Notable)
Lowell	United States	Record daily precipitation	30.0 mm (1.2 in)	34 of 100 (Routine)
Milford	United States	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Crow Agency	United States	Record low minimum temperature	-7.8 C (18.0 F)	34 of 100 (Routine)
Cheraw	United States	Record high minimum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Yemassee 1 N	United States	Record high minimum temperature	21.1 C (70.0 F)	34 of 100 (Routine)
Presa Centenario	Mexico	Record high minimum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Simusir	Russia	Record daily precipitation	57.3 mm (2.3 in)	32 of 100 (Routine)
Baudette	United States	Record low maximum temperature	1.1 C (34.0 F)	32 of 100 (Routine)
Espoey	France	Record daily precipitation	46.8 mm (1.8 in)	31 of 100 (Routine)
Los Tomates	Mexico	Record high minimum temperature	27.8 C (82.0 F)	31 of 100 (Routine)
Chula Vista	United States	Record high maximum temperature	28.3 C (82.9 F)	31 of 100 (Routine)
Birch Hill Dam	United States	Record daily precipitation	38.1 mm (1.5 in)	31 of 100 (Routine)
Hutchinson 1 N	United States	Record low maximum temperature	6.7 C (44.1 F)	31 of 100 (Routine)
San Diego de Alejandria	Mexico	Record high maximum temperature	42.8 C (109.0 F)	30 of 100 (Routine)
Xichang	China	Record daily precipitation	40.1 mm (1.6 in)	29 of 100 (Routine)
Kiev	Ukraine	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Oklee	United States	Record daily snowfall	5.1 cm (2.0 in)	29 of 100 (Routine)
Fitzwilliam 2 W	United States	Record daily precipitation	34.8 mm (1.4 in)	29 of 100 (Routine)
San Luis San Pedro	Mexico	Record high maximum temperature	40.6 C (105.1 F)	28 of 100 (Routine)
Tres Hermanos	Mexico	Record low minimum temperature	7.8 C (46.0 F)	28 of 100 (Routine)
Pogranichnyj	Russia	Record low maximum temperature	6.7 C (44.1 F)	28 of 100 (Routine)
Federal Pt	United States	Record daily precipitation	52.1 mm (2.1 in)	28 of 100 (Routine)
Barre Falls Dam	United States	Record daily precipitation	42.4 mm (1.7 in)	28 of 100 (Routine)
Trinidad AP	United States	Record low minimum temperature	-5.6 C (21.9 F)	28 of 100 (Routine)
Siwa	Egypt	Record low maximum temperature	26.0 C (78.8 F)	27 of 100 (Routine)
Dos Bocas	Puerto Rico [United States]	Record low maximum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
Mahnomen	United States	Record low maximum temperature	1.7 C (35.1 F)	27 of 100 (Routine)
South Lyndeboro	United States	Record daily precipitation	40.1 mm (1.6 in)	27 of 100 (Routine)
Gabes	Tunisia	Record low minimum temperature	8.9 C (48.0 F)	26 of 100 (Routine)
Gastonia	United States	Record high minimum temperature	18.3 C (64.9 F)	26 of 100 (Routine)
Marlin	United States	Record high maximum temperature	33.9 C (93.0 F)	26 of 100 (Routine)
Tulia	United States	Record low minimum temperature	-2.2 C (28.0 F)	26 of 100 (Routine)
Mount Florance	Australia	Record daily precipitation	25.0 mm (1.0 in)	25 of 100 (Routine)
Tully Lake	United States	Record daily precipitation	36.6 mm (1.4 in)	25 of 100 (Routine)
Pasamonte	United States	Record low minimum temperature	-6.1 C (21.0 F)	25 of 100 (Routine)
Fayetteville (Pwc)	United States	Record high minimum temperature	18.9 C (66.0 F)	25 of 100 (Routine)
Kostuckovichi	Belarus	Record daily precipitation	34.5 mm (1.4 in)	24 of 100 (Routine)
Chapulco	Mexico	Record high minimum temperature	13.9 C (57.0 F)	24 of 100 (Routine)
Paraiso	Mexico	Record high maximum temperature	41.7 C (107.1 F)	24 of 100 (Routine)
Onor	Russia	Record daily precipitation	27.8 mm (1.1 in)	24 of 100 (Routine)

Counts by Type and Timescale

633 records

Records set or tied on 1 May 1991 by type: Highest daily maximum 64, Lowest daily maximum 93, Highest daily minimum 153, Lowest daily minimum 81, Heaviest daily rainfall 226, Heaviest daily snowfall 13, Deepest snow cover 3.

Records on 1 May 1991 by type
Record type	Records
Highest daily maximum	64
Lowest daily maximum	93
Highest daily minimum	153
Lowest daily minimum	81
Heaviest daily rainfall	226
Heaviest daily snowfall	13
Deepest snow cover	3

Records on 1 May 1991 by timescale: all-time 2, monthly 35, daily 596.

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 51.0. Ties are not counted.

Top 20 by Significance

1 May 1991

Top 20 records on 1 May 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1991	Pogranichnoe, RU	daily rain	51.9 mm (2.0 in)	42.7 mm (1.7 in)	24 years	52 of 100 (Notable)
1 May 1991	Gorjacij Kljuc, RU	daily rain	37.8 mm (1.5 in)	23.5 mm (0.9 in)	49 years	48 of 100 (Notable)
1 May 1991	Deseret, US	monthly low min	-11.1 C (12.0 F)	4.4 C (7.9 F)	61 years	48 of 100 (Notable)
1 May 1991	Mae Sariang, TH	daily rain	84.1 mm (3.3 in)	44.9 mm (1.8 in)	37 years	47 of 100 (Notable)
1 May 1991	Norrveda, SE	daily rain	32.8 mm (1.3 in)	25.0 mm (1.0 in)	9 years	46 of 100 (Notable)
1 May 1991	Kingstree, US	daily rain	63.5 mm (2.5 in)	18.8 mm (0.7 in)	72 years	45 of 100 (Notable)
1 May 1991	Poronajsk, RU	daily rain	38.4 mm (1.5 in)	13.8 mm (0.5 in)	56 years	41 of 100 (Notable)
1 May 1991	Nahunta 6NE, US	daily rain	69.3 mm (2.7 in)	47.7 mm (1.9 in)	26 years	41 of 100 (Notable)
1 May 1991	Berlin 5 S, US	daily rain	45.7 mm (1.8 in)	24.6 mm (1.0 in)	16 years	41 of 100 (Notable)
1 May 1991	Tarbes - Ossun, FR	daily rain	29.2 mm (1.1 in)	22.0 mm (0.9 in)	41 years	40 of 100 (Notable)
1 May 1991	Soldier Summit, US	monthly low min	-15.6 C (3.9 F)	1.7 C (3.1 F)	57 years	40 of 100 (Notable)
1 May 1991	Grafton, US	daily low max	2.8 C (37.0 F)	1.1 C (2.0 F)	91 years	37 of 100 (Notable)
1 May 1991	Senador Pompeu, BR	daily rain	52.8 mm (2.1 in)	17.3 mm (0.7 in)	62 years	36 of 100 (Notable)
1 May 1991	Deqen, CN	daily rain	33.2 mm (1.3 in)	15.1 mm (0.6 in)	32 years	36 of 100 (Notable)
1 May 1991	Petersham 3 N, US	daily rain	32.0 mm (1.3 in)	8.6 mm (0.34 in)	72 years	36 of 100 (Notable)
1 May 1991	Crookston NW Exp STN, US	daily low max	0.6 C (33.1 F)	1.1 C (2.0 F)	81 years	35 of 100 (Notable)
1 May 1991	Kinston 7 SE, US	daily high min	19.4 C (66.9 F)	0.5 C (0.9 F)	84 years	35 of 100 (Notable)
1 May 1991	Greenwood, US	daily high min	18.3 C (64.9 F)	0.5 C (0.9 F)	84 years	35 of 100 (Notable)
1 May 1991	Santuck, US	daily high min	18.3 C (64.9 F)	0.5 C (0.9 F)	84 years	35 of 100 (Notable)
1 May 1991	Winnsboro, US	daily high min	19.4 C (66.9 F)	0.5 C (0.9 F)	84 years	35 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 1991

Records set or tied on this calendar date in each year from 1795 to 1991. 1991 had 633 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 1991-05-01: 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 10	413
10 to 20	43
20 to 30	8
30 to 40	2
40 to 50	5
50 to 60	2