Weather Records on 1 May 1971

444 weather records were set or tied worldwide on 1 May 1971. Highest significance: Chasm Falls, US.

Key Facts for 1 May 1971

On 1 May 1971, 444 weather records were set or tied at long-record stations worldwide.
60 were record highs and 214 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 22 monthly and 422 daily.
Chasm Falls set a monthly record snow depth of 53.3 cm (21.0 in) on 1 May 1971.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 442 records.

Record Map

444 stations

444 station records on 1 May 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Chasm Falls	United States	Record snow depth	53.3 cm (21.0 in)	62 of 100 (Major)
Wyloo	Australia	Record daily precipitation	45.7 mm (1.8 in)	56 of 100 (Notable)
Zinapecuaro	Mexico	Record daily precipitation	42.9 mm (1.7 in)	56 of 100 (Notable)
Nqutu (Tnk)	South Africa	Record daily precipitation	60.0 mm (2.4 in)	52 of 100 (Notable)
Boscobel	South Africa	Record daily precipitation	36.0 mm (1.4 in)	51 of 100 (Notable)
Karasjok	Norway	Record low minimum temperature	-23.0 C (-9.4 F)	47 of 100 (Notable)
Podor	Senegal	Record high minimum temperature	27.9 C (82.2 F)	46 of 100 (Notable)
Karesuando	Sweden	Record low minimum temperature	-22.0 C (-7.6 F)	45 of 100 (Notable)
Tsomo (Pol)	South Africa	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
Valencia	Spain	Record daily precipitation	32.1 mm (1.3 in)	42 of 100 (Notable)
Zacatecas (Smn)	Mexico	Record high maximum temperature	29.4 C (84.9 F)	40 of 100 (Notable)
St Joseph 3 N	United States	Record low maximum temperature	16.1 C (61.0 F)	39 of 100 (Notable)
Uniao	Brazil	Record daily precipitation	53.4 mm (2.1 in)	37 of 100 (Notable)
Port Gibson 1 NE	United States	Record low maximum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Miami Beach	United States	Record high maximum temperature	33.9 C (93.0 F)	37 of 100 (Notable)
Upanema (Dnocs)	Brazil	Record daily precipitation	57.2 mm (2.3 in)	36 of 100 (Notable)
Tallulah	United States	Record low maximum temperature	15.6 C (60.1 F)	35 of 100 (Notable)
Ntywenka (Bos)	South Africa	Record daily precipitation	32.0 mm (1.3 in)	34 of 100 (Routine)
Bothithong"Bothitho(Pol)"	South Africa	Record daily precipitation	45.5 mm (1.8 in)	34 of 100 (Routine)
Flahult	Sweden	Record low minimum temperature	-7.7 C (18.1 F)	34 of 100 (Routine)
Wonderboom	South Africa	Record daily precipitation	69.1 mm (2.7 in)	33 of 100 (Routine)
Ladybrand (Bos)	South Africa	Record daily precipitation	27.0 mm (1.1 in)	33 of 100 (Routine)
Blakely	United States	Record daily precipitation	47.2 mm (1.9 in)	32 of 100 (Routine)
Clifford Chambers	South Africa	Record daily precipitation	37.5 mm (1.5 in)	31 of 100 (Routine)
Barcelona -Fabra Observatory	Spain	Record daily precipitation	45.4 mm (1.8 in)	31 of 100 (Routine)
Monticello	United States	Record low maximum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Columbus 4 ESE	United States	Record low maximum temperature	13.9 C (57.0 F)	31 of 100 (Routine)
Fayetteville (Pwc)	United States	Record low maximum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Saluda	United States	Record low maximum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Bedford	United States	Record low minimum temperature	1.7 C (35.1 F)	31 of 100 (Routine)
Kwa-Mbonambi (Bos)	South Africa	Record daily precipitation	50.0 mm (2.0 in)	30 of 100 (Routine)
Swartkoppie	South Africa	Record daily precipitation	26.5 mm (1.0 in)	30 of 100 (Routine)
Zevenfontein	South Africa	Record daily precipitation	25.0 mm (1.0 in)	30 of 100 (Routine)
Helena	United States	Record low maximum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Milledgeville	United States	Record low maximum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Kosciusko	United States	Record low maximum temperature	13.9 C (57.0 F)	30 of 100 (Routine)
Louisville	United States	Record low maximum temperature	13.9 C (57.0 F)	30 of 100 (Routine)
Winnsboro	United States	Record low maximum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Tripoli City	Libya	Record high minimum temperature	26.2 C (79.2 F)	29 of 100 (Routine)
Vardoe	Norway	Record low minimum temperature	-6.5 C (20.3 F)	29 of 100 (Routine)
Flagstaff (Tnk)	South Africa	Record daily precipitation	29.5 mm (1.2 in)	29 of 100 (Routine)
Riethoek	South Africa	Record daily precipitation	33.5 mm (1.3 in)	29 of 100 (Routine)
Andalusia 3 W	United States	Record low maximum temperature	18.9 C (66.0 F)	29 of 100 (Routine)
Oneonta	United States	Record low maximum temperature	15.6 C (60.1 F)	29 of 100 (Routine)
Kandalaksa	Russia	Record low minimum temperature	-14.9 C (5.2 F)	28 of 100 (Routine)
Cheraw	United States	Record low maximum temperature	15.6 C (60.1 F)	28 of 100 (Routine)
Kingstree	United States	Record low maximum temperature	17.2 C (63.0 F)	28 of 100 (Routine)
Coromandel Valley (Branden)	Australia	Record daily precipitation	32.0 mm (1.3 in)	27 of 100 (Routine)
Tabankulu (Bos)	South Africa	Record daily precipitation	40.0 mm (1.6 in)	27 of 100 (Routine)
Waynesboro 2 S	United States	Record low maximum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Dillon	United States	Record low maximum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Creston	United States	Record low maximum temperature	11.1 C (52.0 F)	27 of 100 (Routine)
Wrangell AP	United States	Record low minimum temperature	-4.4 C (24.1 F)	27 of 100 (Routine)
Fort Vermilion Cda	Canada	Record high minimum temperature	7.8 C (46.0 F)	26 of 100 (Routine)
Etwa (Bos)	South Africa	Record daily precipitation	36.5 mm (1.4 in)	26 of 100 (Routine)
Camilla 3SE	United States	Record daily precipitation	58.7 mm (2.3 in)	26 of 100 (Routine)
Belhaven 1 SE	United States	Record low maximum temperature	13.9 C (57.0 F)	26 of 100 (Routine)
Lumberton	United States	Record low maximum temperature	16.1 C (61.0 F)	26 of 100 (Routine)
Kershaw 1SW	United States	Record low maximum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
Laurens	United States	Record low maximum temperature	15.6 C (60.1 F)	26 of 100 (Routine)

Counts by Type and Timescale

444 records

Records set or tied on 1 May 1971 by type: Highest daily maximum 31, Lowest daily maximum 84, Highest daily minimum 29, Lowest daily minimum 130, Heaviest daily rainfall 166, Heaviest daily snowfall 1, Deepest snow cover 3.

Records on 1 May 1971 by type
Record type	Records
Highest daily maximum	31
Lowest daily maximum	84
Highest daily minimum	29
Lowest daily minimum	130
Heaviest daily rainfall	166
Heaviest daily snowfall	1
Deepest snow cover	3

Records on 1 May 1971 by timescale: all-time 0, monthly 22, daily 422.

How Much Records Were Beaten By

356 broken records

Margins by which the 356 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 457.0. Ties are not counted.

Top 20 by Significance

1 May 1971

Top 20 records on 1 May 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1971	Chasm Falls, US	monthly snow depth	53.3 cm (21.0 in)	45.7 cm (18.0 in)	28 years	62 of 100 (Major)
1 May 1971	Wyloo, AU	daily rain	45.7 mm (1.8 in)	45.7 mm (1.8 in)	64 years	56 of 100 (Notable)
1 May 1971	Zinapecuaro, MX	daily rain	42.9 mm (1.7 in)	39.9 mm (1.6 in)	42 years	56 of 100 (Notable)
1 May 1971	Nqutu (Tnk), ZA	daily rain	60.0 mm (2.4 in)	51.9 mm (2.0 in)	28 years	52 of 100 (Notable)
1 May 1971	Boscobel, ZA	daily rain	36.0 mm (1.4 in)	36.0 mm (1.4 in)	37 years	51 of 100 (Notable)
1 May 1971	Karasjok, NO	monthly low min	-23.0 C (-9.4 F)	3.8 C (6.8 F)	70 years	47 of 100 (Notable)
1 May 1971	Podor, SN	daily high min	27.9 C (82.2 F)	1.9 C (3.4 F)	111 years	46 of 100 (Notable)
1 May 1971	Karesuando, SE	monthly low min	-22.0 C (-7.6 F)	0.5 C (0.9 F)	85 years	45 of 100 (Notable)
1 May 1971	Tsomo (Pol), ZA	daily rain	29.0 mm (1.1 in)	16.3 mm (0.6 in)	49 years	43 of 100 (Notable)
1 May 1971	Valencia, ES	daily rain	32.1 mm (1.3 in)	23.5 mm (0.9 in)	32 years	42 of 100 (Notable)
1 May 1971	Zacatecas (Smn), MX	daily high max	29.4 C (84.9 F)	5.5 C (9.9 F)	40 years	40 of 100 (Notable)
1 May 1971	St Joseph 3 N, US	daily low max	16.1 C (61.0 F)	5.6 C (10.1 F)	53 years	39 of 100 (Notable)
1 May 1971	Uniao, BR	daily rain	53.4 mm (2.1 in)	31.6 mm (1.2 in)	26 years	37 of 100 (Notable)
1 May 1971	Port Gibson 1 NE, US	daily low max	16.1 C (61.0 F)	2.8 C (5.0 F)	73 years	37 of 100 (Notable)
1 May 1971	Miami Beach, US	daily high max	33.9 C (93.0 F)	4.5 C (8.1 F)	17 years	37 of 100 (Notable)
1 May 1971	Upanema (Dnocs), BR	daily rain	57.2 mm (2.3 in)	37.7 mm (1.5 in)	25 years	36 of 100 (Notable)
1 May 1971	Tallulah, US	monthly low max	15.6 C (60.1 F)	1.1 C (2.0 F)	53 years	35 of 100 (Notable)
1 May 1971	Ntywenka (Bos), ZA	daily rain	32.0 mm (1.3 in)	20.3 mm (0.8 in)	42 years	34 of 100 (Routine)
1 May 1971	Bothithong"Bothitho(Pol)", ZA	daily rain	45.5 mm (1.8 in)	36.5 mm (1.4 in)	9 years	34 of 100 (Routine)
1 May 1971	Flahult, SE	monthly low min	-7.7 C (18.1 F)	0.2 C (0.4 F)	58 years	34 of 100 (Routine)

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 1971

Records set or tied on this calendar date in each year from 1795 to 1971. 1971 had 444 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 1971-05-01: 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 100	355
100 to 200	0
200 to 300	0
300 to 400	0
400 to 500	1