Weather Records on 1 May 1947

655 weather records were set or tied worldwide on 1 May 1947. Highest significance: Fallston, US.

Key Facts for 1 May 1947

On 1 May 1947, 655 weather records were set or tied at long-record stations worldwide.
400 were record highs and 45 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 25 monthly and 630 daily.
Fallston set a daily record precipitation of 71.6 mm (2.8 in) on 1 May 1947.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 441 records.

Record Map

655 stations

655 station records on 1 May 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Fallston	United States	Record daily precipitation	71.6 mm (2.8 in)	57 of 100 (Notable)
Moorestown 4 E	United States	Record daily precipitation	94.2 mm (3.7 in)	56 of 100 (Notable)
Takoma Park # 1	United States	Record daily precipitation	61.5 mm (2.4 in)	52 of 100 (Notable)
College Park	United States	Record daily precipitation	66.5 mm (2.6 in)	49 of 100 (Notable)
E Stroudsburg	United States	Record daily precipitation	43.9 mm (1.7 in)	49 of 100 (Notable)
Clayoquot	Canada	Record daily precipitation	106.4 mm (4.2 in)	47 of 100 (Notable)
Parrsboro	Canada	Record daily precipitation	52.6 mm (2.1 in)	45 of 100 (Notable)
Allentown Gas Company	United States	Record daily precipitation	46.2 mm (1.8 in)	44 of 100 (Notable)
Chestertown	United States	Record daily precipitation	37.1 mm (1.5 in)	42 of 100 (Notable)
Yantabulla Station	Australia	Record daily precipitation	30.0 mm (1.2 in)	41 of 100 (Notable)
Nappan Cda	Canada	Record daily precipitation	33.8 mm (1.3 in)	41 of 100 (Notable)
Windsor Kings College	Canada	Record daily precipitation	47.5 mm (1.9 in)	41 of 100 (Notable)
Charlottetown Cda	Canada	Record daily precipitation	51.3 mm (2.0 in)	40 of 100 (Notable)
Ashville 4 W	United States	Record daily precipitation	42.2 mm (1.7 in)	39 of 100 (Notable)
Dover	United States	Record daily precipitation	38.6 mm (1.5 in)	38 of 100 (Notable)
Montreal McGill	Canada	Record low maximum temperature	2.2 C (36.0 F)	36 of 100 (Notable)
Hyannis	United States	Record daily precipitation	40.6 mm (1.6 in)	36 of 100 (Notable)
Delaware Cy Reedy Poin	United States	Record daily precipitation	44.7 mm (1.8 in)	35 of 100 (Notable)
Millington 1 SE	United States	Record daily precipitation	41.7 mm (1.6 in)	35 of 100 (Notable)
Ft Ripley	United States	Record daily precipitation	33.5 mm (1.3 in)	35 of 100 (Notable)
Sacramento 5 ESE	United States	Record high minimum temperature	17.8 C (64.0 F)	35 of 100 (Notable)
Freehold-Marlboro	United States	Record daily precipitation	45.2 mm (1.8 in)	34 of 100 (Routine)
Calera	United States	Record daily precipitation	55.9 mm (2.2 in)	33 of 100 (Routine)
Woodstock	United States	Record daily precipitation	49.0 mm (1.9 in)	33 of 100 (Routine)
Santa Clara UNIV	United States	Record high maximum temperature	37.2 C (99.0 F)	32 of 100 (Routine)
Maysville Wwtp	United States	Record daily precipitation	40.6 mm (1.6 in)	32 of 100 (Routine)
Pokegama Dam	United States	Record daily precipitation	32.0 mm (1.3 in)	32 of 100 (Routine)
Somerville 4 NW	United States	Record daily precipitation	40.4 mm (1.6 in)	32 of 100 (Routine)
Winnemucca AP	United States	Record high maximum temperature	31.7 C (89.1 F)	32 of 100 (Routine)
Flemington 5 NNW	United States	Record daily precipitation	49.3 mm (1.9 in)	31 of 100 (Routine)
Vineland	United States	Record daily precipitation	50.0 mm (2.0 in)	31 of 100 (Routine)
Freeland	United States	Record daily precipitation	45.7 mm (1.8 in)	31 of 100 (Routine)
Lebanon 3 W	United States	Record daily precipitation	39.6 mm (1.6 in)	31 of 100 (Routine)
Vanceburg	United States	Record daily precipitation	30.2 mm (1.2 in)	30 of 100 (Routine)
Coleman 3 WNW	United States	Record daily precipitation	46.7 mm (1.8 in)	30 of 100 (Routine)
Houston Wb City	United States	Record high maximum temperature	34.4 C (93.9 F)	30 of 100 (Routine)
Brockville	Canada	Record low maximum temperature	3.9 C (39.0 F)	29 of 100 (Routine)
Mauzy	United States	Record daily precipitation	34.8 mm (1.4 in)	29 of 100 (Routine)
Towson	United States	Record daily precipitation	57.7 mm (2.3 in)	29 of 100 (Routine)
Harrison 1 NNW	United States	Record daily precipitation	35.8 mm (1.4 in)	29 of 100 (Routine)
Long Prairie	United States	Record daily precipitation	41.9 mm (1.6 in)	29 of 100 (Routine)
Elizabeth	United States	Record daily precipitation	35.6 mm (1.4 in)	29 of 100 (Routine)
Bathurst	Canada	Record low maximum temperature	2.8 C (37.0 F)	28 of 100 (Routine)
Annapolis Royal	Canada	Record daily precipitation	51.3 mm (2.0 in)	28 of 100 (Routine)
Stillwater	Canada	Record daily precipitation	66.0 mm (2.6 in)	28 of 100 (Routine)
San Jose	United States	Record high minimum temperature	15.0 C (59.0 F)	28 of 100 (Routine)
Grand Coteau	United States	Record high minimum temperature	28.3 C (82.9 F)	28 of 100 (Routine)
Newton	United States	Record daily precipitation	53.3 mm (2.1 in)	28 of 100 (Routine)
Pembroke Eddy Match	Canada	Record low maximum temperature	5.6 C (42.1 F)	27 of 100 (Routine)
Wolfville	Canada	Record daily precipitation	50.3 mm (2.0 in)	27 of 100 (Routine)
Washington	United States	Record high minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Joliette	Canada	Record low maximum temperature	0.6 C (33.1 F)	26 of 100 (Routine)
Macdonald College	Canada	Record low maximum temperature	2.2 C (36.0 F)	26 of 100 (Routine)
Rogers	United States	Record daily precipitation	47.2 mm (1.9 in)	26 of 100 (Routine)
Berkeley	United States	Record high maximum temperature	31.1 C (88.0 F)	26 of 100 (Routine)
San Jose	United States	Record high maximum temperature	35.6 C (96.1 F)	26 of 100 (Routine)
Little Falls 2NNE	United States	Record daily precipitation	27.9 mm (1.1 in)	26 of 100 (Routine)
Lambertville River	United States	Record daily precipitation	35.6 mm (1.4 in)	26 of 100 (Routine)
Weldon	United States	Record high minimum temperature	20.6 C (69.1 F)	26 of 100 (Routine)
Quakertown	United States	Record daily precipitation	53.3 mm (2.1 in)	26 of 100 (Routine)

Counts by Type and Timescale

655 records

Records set or tied on 1 May 1947 by type: Highest daily maximum 225, Lowest daily maximum 37, Highest daily minimum 175, Lowest daily minimum 8, Heaviest daily rainfall 209, Heaviest daily snowfall 1.

Records on 1 May 1947 by type
Record type	Records
Highest daily maximum	225
Lowest daily maximum	37
Highest daily minimum	175
Lowest daily minimum	8
Heaviest daily rainfall	209
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 1 May 1947 by timescale: all-time 0, monthly 25, daily 630.

How Much Records Were Beaten By

544 broken records

Margins by which the 544 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 82.8. Ties are not counted.

Top 20 by Significance

1 May 1947

Top 20 records on 1 May 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1947	Fallston, US	daily rain	71.6 mm (2.8 in)	41.6 mm (1.6 in)	49 years	57 of 100 (Notable)
1 May 1947	Moorestown 4 E, US	daily rain	94.2 mm (3.7 in)	69.8 mm (2.7 in)	28 years	56 of 100 (Notable)
1 May 1947	Takoma Park # 1, US	daily rain	61.5 mm (2.4 in)	48.8 mm (1.9 in)	28 years	52 of 100 (Notable)
1 May 1947	College Park, US	daily rain	66.5 mm (2.6 in)	47.7 mm (1.9 in)	14 years	49 of 100 (Notable)
1 May 1947	E Stroudsburg, US	daily rain	43.9 mm (1.7 in)	35.0 mm (1.4 in)	28 years	49 of 100 (Notable)
1 May 1947	Clayoquot, CA	daily rain	106.4 mm (4.2 in)	82.8 mm (3.3 in)	6 years	47 of 100 (Notable)
1 May 1947	Parrsboro, CA	daily rain	52.6 mm (2.1 in)	36.1 mm (1.4 in)	21 years	45 of 100 (Notable)
1 May 1947	Allentown Gas Company, US	daily rain	46.2 mm (1.8 in)	37.8 mm (1.5 in)	14 years	44 of 100 (Notable)
1 May 1947	Chestertown, US	daily rain	37.1 mm (1.5 in)	22.9 mm (0.9 in)	49 years	42 of 100 (Notable)
1 May 1947	Yantabulla Station, AU	daily rain	30.0 mm (1.2 in)	27.2 mm (1.1 in)	44 years	41 of 100 (Notable)
1 May 1947	Nappan Cda, CA	daily rain	33.8 mm (1.3 in)	17.8 mm (0.7 in)	28 years	41 of 100 (Notable)
1 May 1947	Windsor Kings College, CA	daily rain	47.5 mm (1.9 in)	23.9 mm (0.9 in)	18 years	41 of 100 (Notable)
1 May 1947	Charlottetown Cda, CA	monthly rain	51.3 mm (2.0 in)	17.3 mm (0.7 in)	6 years	40 of 100 (Notable)
1 May 1947	Ashville 4 W, US	daily rain	42.2 mm (1.7 in)	32.0 mm (1.3 in)	37 years	39 of 100 (Notable)
1 May 1947	Dover, US	daily rain	38.6 mm (1.5 in)	24.4 mm (1.0 in)	40 years	38 of 100 (Notable)
1 May 1947	Montreal McGill, CA	monthly low max	2.2 C (36.0 F)	1.1 C (2.0 F)	58 years	36 of 100 (Notable)
1 May 1947	Hyannis, US	daily rain	40.6 mm (1.6 in)	23.6 mm (0.9 in)	37 years	36 of 100 (Notable)
1 May 1947	Delaware Cy Reedy Poin, US	daily rain	44.7 mm (1.8 in)	23.6 mm (0.9 in)	28 years	35 of 100 (Notable)
1 May 1947	Millington 1 SE, US	daily rain	41.7 mm (1.6 in)	21.1 mm (0.8 in)	28 years	35 of 100 (Notable)
1 May 1947	Ft Ripley, US	daily rain	33.5 mm (1.3 in)	17.0 mm (0.7 in)	51 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 1947

Records set or tied on this calendar date in each year from 1795 to 1947. 1947 had 655 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 1947-05-01: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 20	513
20 to 40	25
40 to 60	4
60 to 80	1
80 to 100	1