Weather Records on 1 May 1978

1,202 weather records were set or tied worldwide on 1 May 1978. Highest significance: Perm, RU.

Key Facts for 1 May 1978

On 1 May 1978, 1,202 weather records were set or tied at long-record stations worldwide.
96 were record highs and 610 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 145 monthly and 1,055 daily.
Perm set a daily record precipitation of 30.1 mm (1.2 in) on 1 May 1978.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 438 records.

Record Map

1,202 stations

1,202 station records on 1 May 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Perm	Russia	Record daily precipitation	30.1 mm (1.2 in)	71 of 100 (Major)
Nyabing	Australia	Record daily precipitation	50.0 mm (2.0 in)	64 of 100 (Major)
Fort Beaufort	South Africa	Record daily precipitation	50.0 mm (2.0 in)	63 of 100 (Major)
Tonti (Bos)	South Africa	Record daily precipitation	120.0 mm (4.7 in)	63 of 100 (Major)
Ft Collins	United States	Record daily precipitation	47.0 mm (1.9 in)	61 of 100 (Major)
Cimarron	United States	Record daily precipitation	111.8 mm (4.4 in)	60 of 100 (Major)
Lysva	Russia	Record daily precipitation	29.0 mm (1.1 in)	59 of 100 (Notable)
Fulton 3 W	United States	Record daily precipitation	91.4 mm (3.6 in)	58 of 100 (Notable)
Bad Ems	Germany	Record daily precipitation	42.0 mm (1.7 in)	56 of 100 (Notable)
Woodfords	United States	Record daily precipitation	38.1 mm (1.5 in)	55 of 100 (Notable)
Westbourne	Australia	Record daily precipitation	60.0 mm (2.4 in)	54 of 100 (Notable)
Nozovka	Russia	Record daily precipitation	29.8 mm (1.2 in)	54 of 100 (Notable)
Kaiserslautern	Germany	Record daily precipitation	36.2 mm (1.4 in)	52 of 100 (Notable)
Syracuse 1NE	United States	Record daily precipitation	53.3 mm (2.1 in)	52 of 100 (Notable)
Greenwood	United States	Record daily precipitation	106.4 mm (4.2 in)	52 of 100 (Notable)
Vaiden 1 SSW	United States	Record daily precipitation	79.2 mm (3.1 in)	52 of 100 (Notable)
Eureka	Canada	Record daily snowfall	6.6 cm (2.6 in)	51 of 100 (Notable)
Lakin	United States	Record daily precipitation	72.4 mm (2.9 in)	51 of 100 (Notable)
Penn Yan	United States	Record low minimum temperature	-9.4 C (15.1 F)	51 of 100 (Notable)
Holzhausen A.D. Haide	Germany	Record daily precipitation	35.0 mm (1.4 in)	50 of 100 (Notable)
Huntingdon	Canada	Record low maximum temperature	1.1 C (34.0 F)	49 of 100 (Notable)
Wisley	United Kingdom	Record daily precipitation	30.0 mm (1.2 in)	49 of 100 (Notable)
Dolores	United States	Record daily snowfall	11.4 cm (4.5 in)	49 of 100 (Notable)
Newnan 7 WNW	United States	Record daily precipitation	60.5 mm (2.4 in)	49 of 100 (Notable)
Scott City	United States	Record daily precipitation	57.4 mm (2.3 in)	48 of 100 (Notable)
Hightower	United States	Record daily precipitation	73.2 mm (2.9 in)	47 of 100 (Notable)
Adrian 2 NNE	United States	Record low minimum temperature	-6.7 C (19.9 F)	47 of 100 (Notable)
University	United States	Record daily precipitation	61.5 mm (2.4 in)	47 of 100 (Notable)
Kahl/Main	Germany	Record daily precipitation	31.8 mm (1.3 in)	46 of 100 (Notable)
Bad Kreuznach	Germany	Record daily precipitation	26.1 mm (1.0 in)	46 of 100 (Notable)
Lambert 1W	United States	Record daily precipitation	102.9 mm (4.1 in)	46 of 100 (Notable)
Darby	United States	Record daily precipitation	31.8 mm (1.3 in)	46 of 100 (Notable)
Enosburg Falls	United States	Record low maximum temperature	1.1 C (34.0 F)	46 of 100 (Notable)
Hatteras	United States	Record low minimum temperature	4.4 C (39.9 F)	46 of 100 (Notable)
Little Swanport (Lisdillon)	Australia	Record daily precipitation	44.0 mm (1.7 in)	45 of 100 (Notable)
Brome	Canada	Record low maximum temperature	0.0 C (32.0 F)	44 of 100 (Notable)
Boulder	United States	Record daily precipitation	39.1 mm (1.5 in)	44 of 100 (Notable)
Cleveland	United States	Record daily precipitation	103.4 mm (4.1 in)	43 of 100 (Notable)
Welland	Canada	Record low minimum temperature	-4.0 C (24.8 F)	42 of 100 (Notable)
Milan	Italy	Record daily precipitation	46.7 mm (1.8 in)	42 of 100 (Notable)
Cordova 2 ENE	United States	Record daily precipitation	91.4 mm (3.6 in)	42 of 100 (Notable)
Port Stanley	Canada	Record low maximum temperature	5.5 C (41.9 F)	41 of 100 (Notable)
Grenada	United States	Record daily precipitation	62.2 mm (2.4 in)	41 of 100 (Notable)
Water Valley	United States	Record daily precipitation	65.0 mm (2.6 in)	41 of 100 (Notable)
Geisenheim	Germany	Record daily precipitation	39.8 mm (1.6 in)	40 of 100 (Notable)
Nurburg	Germany	Record daily precipitation	28.4 mm (1.1 in)	40 of 100 (Notable)
Blaauwkop	South Africa	Record daily precipitation	55.0 mm (2.2 in)	40 of 100 (Notable)
Waterdale	United States	Record daily precipitation	32.5 mm (1.3 in)	40 of 100 (Notable)
Augusta	United States	Record daily precipitation	102.9 mm (4.1 in)	40 of 100 (Notable)
Burdett 3S	United States	Record daily precipitation	43.9 mm (1.7 in)	40 of 100 (Notable)
Fowler 3 NNE	United States	Record daily precipitation	89.7 mm (3.5 in)	40 of 100 (Notable)
Liberal	United States	Record daily precipitation	48.8 mm (1.9 in)	40 of 100 (Notable)
Kipling 4 NNW	United States	Record daily precipitation	74.4 mm (2.9 in)	40 of 100 (Notable)
Louisville	United States	Record daily precipitation	62.0 mm (2.4 in)	40 of 100 (Notable)
Tuckerton 2 NE	United States	Record low minimum temperature	-2.8 C (27.0 F)	40 of 100 (Notable)
Ottawa Cda	Canada	Record low maximum temperature	2.5 C (36.5 F)	39 of 100 (Notable)
Imperial	United States	Record daily precipitation	44.5 mm (1.8 in)	39 of 100 (Notable)
Sharon Springs	United States	Record daily precipitation	67.1 mm (2.6 in)	39 of 100 (Notable)
Cooperstown	United States	Record low maximum temperature	2.8 C (37.0 F)	39 of 100 (Notable)
Worms	Germany	Record daily precipitation	34.3 mm (1.4 in)	38 of 100 (Notable)

Counts by Type and Timescale

1,202 records

Records set or tied on 1 May 1978 by type: Highest daily maximum 26, Lowest daily maximum 210, Highest daily minimum 70, Lowest daily minimum 400, Heaviest daily rainfall 463, Heaviest daily snowfall 27, Deepest snow cover 6.

Records on 1 May 1978 by type
Record type	Records
Highest daily maximum	26
Lowest daily maximum	210
Highest daily minimum	70
Lowest daily minimum	400
Heaviest daily rainfall	463
Heaviest daily snowfall	27
Deepest snow cover	6

Records on 1 May 1978 by timescale: all-time 2, monthly 145, daily 1,055.

How Much Records Were Beaten By

968 broken records

Margins by which the 968 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 254.0. Ties are not counted.

Top 20 by Significance

1 May 1978

Top 20 records on 1 May 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1978	Perm, RU	daily rain	30.1 mm (1.2 in)	20.9 mm (0.8 in)	73 years	71 of 100 (Major)
1 May 1978	Nyabing, AU	daily rain	50.0 mm (2.0 in)	44.7 mm (1.8 in)	63 years	64 of 100 (Major)
1 May 1978	Fort Beaufort, ZA	daily rain	50.0 mm (2.0 in)	31.5 mm (1.2 in)	59 years	63 of 100 (Major)
1 May 1978	Tonti (Bos), ZA	daily rain	120.0 mm (4.7 in)	102.2 mm (4.0 in)	56 years	63 of 100 (Major)
1 May 1978	Ft Collins, US	daily rain	47.0 mm (1.9 in)	33.8 mm (1.3 in)	68 years	61 of 100 (Major)
1 May 1978	Cimarron, US	daily rain	111.8 mm (4.4 in)	64.6 mm (2.5 in)	48 years	60 of 100 (Major)
1 May 1978	Lysva, RU	daily rain	29.0 mm (1.1 in)	19.6 mm (0.8 in)	40 years	59 of 100 (Notable)
1 May 1978	Fulton 3 W, US	daily rain	91.4 mm (3.6 in)	55.8 mm (2.2 in)	68 years	58 of 100 (Notable)
1 May 1978	Bad Ems, DE	daily rain	42.0 mm (1.7 in)	26.6 mm (1.0 in)	40 years	56 of 100 (Notable)
1 May 1978	Woodfords, US	daily rain	38.1 mm (1.5 in)	30.5 mm (1.2 in)	28 years	55 of 100 (Notable)
1 May 1978	Westbourne, AU	daily rain	60.0 mm (2.4 in)	38.9 mm (1.5 in)	25 years	54 of 100 (Notable)
1 May 1978	Nozovka, RU	daily rain	29.8 mm (1.2 in)	18.6 mm (0.7 in)	33 years	54 of 100 (Notable)
1 May 1978	Kaiserslautern, DE	daily rain	36.2 mm (1.4 in)	17.9 mm (0.7 in)	40 years	52 of 100 (Notable)
1 May 1978	Syracuse 1NE, US	daily rain	53.3 mm (2.1 in)	36.0 mm (1.4 in)	44 years	52 of 100 (Notable)
1 May 1978	Greenwood, US	daily rain	106.4 mm (4.2 in)	75.9 mm (3.0 in)	28 years	52 of 100 (Notable)
1 May 1978	Vaiden 1 SSW, US	daily rain	79.2 mm (3.1 in)	28.4 mm (1.1 in)	84 years	52 of 100 (Notable)
1 May 1978	Eureka, CA	daily snowfall	6.6 cm (2.6 in)	6.6 cm (2.6 in)	29 years	51 of 100 (Notable)
1 May 1978	Lakin, US	daily rain	72.4 mm (2.9 in)	28.7 mm (1.1 in)	64 years	51 of 100 (Notable)
1 May 1978	Penn Yan, US	monthly low min	-9.4 C (15.1 F)	5.5 C (9.9 F)	74 years	51 of 100 (Notable)
1 May 1978	Holzhausen A.D. Haide, DE	daily rain	35.0 mm (1.4 in)	24.0 mm (0.9 in)	36 years	50 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 1978

Records set or tied on this calendar date in each year from 1795 to 1978. 1978 had 1,202 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 1978-05-01: 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 50	951
50 to 100	13
100 to 150	3
150 to 200	0
200 to 250	0
250 to 300	1