Weather Records on 1 May 1987

1,098 weather records were set or tied worldwide on 1 May 1987. Highest significance: Merredin, AU.

Key Facts for 1 May 1987

On 1 May 1987, 1,098 weather records were set or tied at long-record stations worldwide.
687 were record highs and 189 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 33 monthly and 1,065 daily.
Merredin set a daily record precipitation of 25.0 mm (1.0 in) on 1 May 1987.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 438 records.

Record Map

1,098 stations

1,098 station records on 1 May 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Merredin	Australia	Record daily precipitation	25.0 mm (1.0 in)	53 of 100 (Notable)
Gateway 1ENE	United States	Record daily precipitation	27.9 mm (1.1 in)	53 of 100 (Notable)
Hill City	United States	Record daily precipitation	48.8 mm (1.9 in)	53 of 100 (Notable)
Putbus	Germany	Record high minimum temperature	12.7 C (54.9 F)	49 of 100 (Notable)
Irapuato	Mexico	Record low minimum temperature	5.6 C (42.1 F)	48 of 100 (Notable)
Stockholm	Sweden	Record high maximum temperature	23.0 C (73.4 F)	43 of 100 (Notable)
Wanyuan	China	Record daily precipitation	52.3 mm (2.1 in)	41 of 100 (Notable)
Guajataca Dam	Puerto Rico [United States]	Record daily precipitation	85.3 mm (3.4 in)	40 of 100 (Notable)
Linkoeping-Malmslaett	Sweden	Record high minimum temperature	11.2 C (52.2 F)	39 of 100 (Notable)
Uppsala_Aut	Sweden	Record high minimum temperature	9.3 C (48.7 F)	39 of 100 (Notable)
Brinkley	United States	Record high maximum temperature	33.3 C (91.9 F)	39 of 100 (Notable)
Shasta Dam	United States	Record daily precipitation	47.8 mm (1.9 in)	39 of 100 (Notable)
Binda Post Office	Australia	Record daily precipitation	34.0 mm (1.3 in)	38 of 100 (Notable)
Claremore 2 ENE	United States	Record high maximum temperature	32.8 C (91.0 F)	38 of 100 (Notable)
University	United States	Record high maximum temperature	32.8 C (91.0 F)	37 of 100 (Notable)
Covington 3 SW	United States	Record high maximum temperature	33.3 C (91.9 F)	37 of 100 (Notable)
Lake Yellowstone	United States	Record high maximum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
St. Petersburg	Russia	Record high minimum temperature	12.5 C (54.5 F)	36 of 100 (Notable)
Plain Dealing	United States	Record high maximum temperature	32.8 C (91.0 F)	36 of 100 (Notable)
Unionville	United States	Record high maximum temperature	31.1 C (88.0 F)	36 of 100 (Notable)
Emerald Post Office	Australia	Record high minimum temperature	20.4 C (68.7 F)	35 of 100 (Notable)
University of Queensland Gatto	Australia	Record daily precipitation	57.1 mm (2.2 in)	34 of 100 (Routine)
Tartu-Toravere	Estonia	Record high minimum temperature	11.4 C (52.5 F)	34 of 100 (Routine)
Musoma	Tanzania	Record daily precipitation	60.5 mm (2.4 in)	34 of 100 (Routine)
Marianna 2 S	United States	Record high maximum temperature	33.3 C (91.9 F)	34 of 100 (Routine)
Ozark	United States	Record high maximum temperature	32.8 C (91.0 F)	34 of 100 (Routine)
Milledgeville	United States	Record high maximum temperature	34.4 C (93.9 F)	34 of 100 (Routine)
Melstone	United States	Record high minimum temperature	14.4 C (57.9 F)	34 of 100 (Routine)
Newberry	United States	Record high maximum temperature	33.9 C (93.0 F)	34 of 100 (Routine)
Hefei	China	Record daily precipitation	51.6 mm (2.0 in)	33 of 100 (Routine)
Tranebjerg	Denmark	Record high minimum temperature	11.1 C (52.0 F)	33 of 100 (Routine)
St Joseph 3 N	United States	Record high maximum temperature	33.9 C (93.0 F)	33 of 100 (Routine)
Sumter	United States	Record high maximum temperature	33.9 C (93.0 F)	33 of 100 (Routine)
Lnai Culture & Heritage Ctr	United States	Record low maximum temperature	18.3 C (64.9 F)	33 of 100 (Routine)
Visby_Flygplats	Sweden	Record high maximum temperature	21.3 C (70.3 F)	32 of 100 (Routine)
Flahult	Sweden	Record high minimum temperature	8.0 C (46.4 F)	32 of 100 (Routine)
Dull Ctr 1SE	United States	Record high minimum temperature	13.3 C (55.9 F)	32 of 100 (Routine)
Kanalohuluhulu 1075	United States	Record low maximum temperature	13.9 C (57.0 F)	32 of 100 (Routine)
Thurlga	Australia	Record daily precipitation	31.6 mm (1.2 in)	31 of 100 (Routine)
Malvern	United Kingdom	Record high minimum temperature	11.9 C (53.4 F)	31 of 100 (Routine)
Bay Minette	United States	Record high maximum temperature	32.8 C (91.0 F)	31 of 100 (Routine)
Cassville 1 NE	United States	Record high maximum temperature	30.6 C (87.1 F)	31 of 100 (Routine)
El Carmen (Smn)	Mexico	Record low minimum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Tonala (Smn)	Mexico	Record high minimum temperature	30.0 C (86.0 F)	30 of 100 (Routine)
Gavle	Sweden	Record high minimum temperature	13.1 C (55.6 F)	30 of 100 (Routine)
Isparta	Turkey	Record low maximum temperature	7.4 C (45.3 F)	30 of 100 (Routine)
Midwest	United States	Record high minimum temperature	18.3 C (64.9 F)	30 of 100 (Routine)
Union Hidalgo	Mexico	Record low minimum temperature	16.7 C (62.1 F)	29 of 100 (Routine)
Hot Springs 1 NNE	United States	Record high maximum temperature	34.4 C (93.9 F)	29 of 100 (Routine)
Cape May 2 NW	United States	Record low minimum temperature	3.3 C (37.9 F)	29 of 100 (Routine)
Basin	United States	Record high minimum temperature	13.9 C (57.0 F)	29 of 100 (Routine)
Westermarkelsdorf/Fehmarn	Germany	Record high minimum temperature	11.0 C (51.8 F)	28 of 100 (Routine)
Ciudad Venustiano Carranza	Mexico	Record low maximum temperature	25.0 C (77.0 F)	28 of 100 (Routine)
Lowestoft	United Kingdom	Record high minimum temperature	11.2 C (52.2 F)	28 of 100 (Routine)
Grass Range	United States	Record high minimum temperature	11.1 C (52.0 F)	28 of 100 (Routine)
Delhi 2 SE	United States	Record low maximum temperature	5.6 C (42.1 F)	28 of 100 (Routine)
Foxholm 7 N	United States	Record high maximum temperature	30.6 C (87.1 F)	28 of 100 (Routine)
Laurens	United States	Record high maximum temperature	33.9 C (93.0 F)	28 of 100 (Routine)
Zolotoj	Russia	Record high maximum temperature	20.2 C (68.4 F)	27 of 100 (Routine)
Nassjo	Sweden	Record high minimum temperature	10.6 C (51.1 F)	27 of 100 (Routine)

Counts by Type and Timescale

1,098 records

Records set or tied on 1 May 1987 by type: Highest daily maximum 344, Lowest daily maximum 64, Highest daily minimum 343, Lowest daily minimum 125, Heaviest daily rainfall 216, Heaviest daily snowfall 1, Deepest snow cover 5.

Records on 1 May 1987 by type
Record type	Records
Highest daily maximum	344
Lowest daily maximum	64
Highest daily minimum	343
Lowest daily minimum	125
Heaviest daily rainfall	216
Heaviest daily snowfall	1
Deepest snow cover	5

Records on 1 May 1987 by timescale: all-time 0, monthly 33, daily 1,065.

How Much Records Were Beaten By

873 broken records

Margins by which the 873 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 1987

Top 20 records on 1 May 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1987	Merredin, AU	daily rain	25.0 mm (1.0 in)	18.1 mm (0.7 in)	65 years	53 of 100 (Notable)
1 May 1987	Gateway 1ENE, US	daily rain	27.9 mm (1.1 in)	19.0 mm (0.7 in)	32 years	53 of 100 (Notable)
1 May 1987	Hill City, US	daily rain	48.8 mm (1.9 in)	42.2 mm (1.7 in)	20 years	53 of 100 (Notable)
1 May 1987	Putbus, DE	daily high min	12.7 C (54.9 F)	3.6 C (6.5 F)	95 years	49 of 100 (Notable)
1 May 1987	Irapuato, MX	monthly low min	5.6 C (42.1 F)	2.7 C (4.9 F)	60 years	48 of 100 (Notable)
1 May 1987	Stockholm, SE	daily high max	23.0 C (73.4 F)	2.0 C (3.6 F)	96 years	43 of 100 (Notable)
1 May 1987	Wanyuan, CN	daily rain	52.3 mm (2.1 in)	38.0 mm (1.5 in)	24 years	41 of 100 (Notable)
1 May 1987	Guajataca Dam, PR	daily rain	85.3 mm (3.4 in)	51.0 mm (2.0 in)	28 years	40 of 100 (Notable)
1 May 1987	Linkoeping-Malmslaett, SE	daily high min	11.2 C (52.2 F)	1.2 C (2.2 F)	89 years	39 of 100 (Notable)
1 May 1987	Uppsala_Aut, SE	daily high min	9.3 C (48.7 F)	1.4 C (2.5 F)	89 years	39 of 100 (Notable)
1 May 1987	Brinkley, US	daily high max	33.3 C (91.9 F)	1.1 C (2.0 F)	91 years	39 of 100 (Notable)
1 May 1987	Shasta Dam, US	daily rain	47.8 mm (1.9 in)	31.0 mm (1.2 in)	34 years	39 of 100 (Notable)
1 May 1987	Binda Post Office, AU	daily rain	34.0 mm (1.3 in)	22.1 mm (0.9 in)	13 years	38 of 100 (Notable)
1 May 1987	Claremore 2 ENE, US	daily high max	32.8 C (91.0 F)	1.7 C (3.1 F)	86 years	38 of 100 (Notable)
1 May 1987	University, US	daily high max	32.8 C (91.0 F)	0.6 C (1.1 F)	92 years	37 of 100 (Notable)
1 May 1987	Covington 3 SW, US	daily high max	33.3 C (91.9 F)	1.1 C (2.0 F)	87 years	37 of 100 (Notable)
1 May 1987	Lake Yellowstone, US	daily high max	18.3 C (64.9 F)	2.7 C (4.9 F)	82 years	37 of 100 (Notable)
1 May 1987	St. Petersburg, RU	daily high min	12.5 C (54.5 F)	1.1 C (2.0 F)	80 years	36 of 100 (Notable)
1 May 1987	Plain Dealing, US	daily high max	32.8 C (91.0 F)	0.6 C (1.1 F)	88 years	36 of 100 (Notable)
1 May 1987	Unionville, US	daily high max	31.1 C (88.0 F)	1.1 C (2.0 F)	85 years	36 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 1987

Records set or tied on this calendar date in each year from 1795 to 1987. 1987 had 1,098 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 1987-05-01: 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	829
10 to 20	27
20 to 30	11
30 to 40	3
40 to 50	1
50 to 60	2