Weather Records on 30 April 1947

330 weather records were set or tied worldwide on 30 April 1947. Highest significance: Baltimore Customs House, US.

Key Facts for 30 April 1947

On 30 April 1947, 330 weather records were set or tied at long-record stations worldwide.
171 were record highs and 42 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 316 daily.
Baltimore Customs House set a daily record precipitation of 77.7 mm (3.1 in) on 30 April 1947.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 447 records.

Record Map

330 stations

330 station records on 30 April 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 April 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Baltimore Customs House	United States	Record daily precipitation	77.7 mm (3.1 in)	62 of 100 (Major)
Carlisle	United States	Record daily precipitation	32.5 mm (1.3 in)	45 of 100 (Notable)
Manistee 3SE	United States	Record daily precipitation	33.0 mm (1.3 in)	43 of 100 (Notable)
St Fereol	Canada	Record daily snowfall	20.3 cm (8.0 in)	38 of 100 (Notable)
Bloomington Normal	United States	Record daily precipitation	83.6 mm (3.3 in)	38 of 100 (Notable)
La Pocatiere Cda	Canada	Record low minimum temperature	-13.9 C (7.0 F)	35 of 100 (Notable)
Philadelphia City	United States	Record daily precipitation	84.6 mm (3.3 in)	35 of 100 (Notable)
Reading Wb City	United States	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Madawaska	Canada	Record daily precipitation	39.1 mm (1.5 in)	34 of 100 (Routine)
Lumding	India	Record daily precipitation	50.8 mm (2.0 in)	33 of 100 (Routine)
Fairview	United States	Record daily precipitation	35.6 mm (1.4 in)	32 of 100 (Routine)
Atlantic 1 NE	United States	Record daily precipitation	30.5 mm (1.2 in)	32 of 100 (Routine)
Vernal	United States	Record high maximum temperature	32.8 C (91.0 F)	32 of 100 (Routine)
Digby	Canada	Record daily precipitation	47.0 mm (1.9 in)	31 of 100 (Routine)
Prescott 2 NNW	United States	Record daily precipitation	73.7 mm (2.9 in)	31 of 100 (Routine)
Major Isidoro (Sertaozinho)	Brazil	Record daily precipitation	31.5 mm (1.2 in)	30 of 100 (Routine)
Channel	Canada	Record low minimum temperature	-9.4 C (15.1 F)	30 of 100 (Routine)
Del Monte	United States	Record high maximum temperature	32.8 C (91.0 F)	30 of 100 (Routine)
Healdsburg	United States	Record high minimum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Jacksonville Wb City	United States	Record high minimum temperature	21.7 C (71.1 F)	30 of 100 (Routine)
Natashquan A	Canada	Record daily snowfall	12.7 cm (5.0 in)	29 of 100 (Routine)
Tadoussac	Canada	Record low maximum temperature	-6.1 C (21.0 F)	29 of 100 (Routine)
Cap Madeleine	Canada	Record daily snowfall	10.2 cm (4.0 in)	27 of 100 (Routine)
Gaspe	Canada	Record low maximum temperature	-2.2 C (28.0 F)	26 of 100 (Routine)
Bathurst	Canada	Record low minimum temperature	-10.6 C (12.9 F)	26 of 100 (Routine)
Dwight	United States	Record daily precipitation	28.4 mm (1.1 in)	26 of 100 (Routine)
Porto Real Do Colegio	Brazil	Record daily precipitation	86.0 mm (3.4 in)	25 of 100 (Routine)
Pointe Au Pere	Canada	Record low maximum temperature	-0.6 C (30.9 F)	25 of 100 (Routine)
Placerville	United States	Record high maximum temperature	32.8 C (91.0 F)	25 of 100 (Routine)
Titusville	United States	Record high minimum temperature	23.9 C (75.0 F)	25 of 100 (Routine)
Anderson Wtr Wks	United States	Record daily precipitation	33.0 mm (1.3 in)	25 of 100 (Routine)
Monticello	United States	Record daily precipitation	37.3 mm (1.5 in)	25 of 100 (Routine)
Annapolis US Naval Aca	United States	Record daily precipitation	27.4 mm (1.1 in)	25 of 100 (Routine)
Hagansport	United States	Record daily precipitation	43.4 mm (1.7 in)	25 of 100 (Routine)
Bancroft	Canada	Record high minimum temperature	10.0 C (50.0 F)	24 of 100 (Routine)
Dudinka	Russia	Record high minimum temperature	1.9 C (35.4 F)	24 of 100 (Routine)
Pine Bluff	United States	Record daily precipitation	46.2 mm (1.8 in)	24 of 100 (Routine)
Rochester	United States	Record daily precipitation	33.0 mm (1.3 in)	24 of 100 (Routine)
Arcadia	United States	Record daily precipitation	37.3 mm (1.5 in)	24 of 100 (Routine)
Huntingdon	United States	Record high minimum temperature	15.0 C (59.0 F)	24 of 100 (Routine)
Washington	United States	Record high minimum temperature	17.8 C (64.0 F)	24 of 100 (Routine)
Great Falls	United States	Record high minimum temperature	16.1 C (61.0 F)	23 of 100 (Routine)
Phillipsburg	United States	Record daily precipitation	43.2 mm (1.7 in)	23 of 100 (Routine)
Angelica	United States	Record high minimum temperature	13.9 C (57.0 F)	23 of 100 (Routine)
Lexington	United States	Record high minimum temperature	17.2 C (63.0 F)	23 of 100 (Routine)
Piripiri	Brazil	Record daily precipitation	50.0 mm (2.0 in)	22 of 100 (Routine)
Brandon Cda	Canada	Record high minimum temperature	11.7 C (53.1 F)	22 of 100 (Routine)
Shawinigan	Canada	Record low minimum temperature	-8.9 C (16.0 F)	22 of 100 (Routine)
Hope 3 NE	United States	Record daily precipitation	72.4 mm (2.9 in)	22 of 100 (Routine)
Jamestown State Hosp	United States	Record high minimum temperature	10.6 C (51.1 F)	22 of 100 (Routine)
Chapleau 2	Canada	Record daily snowfall	6.4 cm (2.5 in)	21 of 100 (Routine)
Macdonald College	Canada	Record low minimum temperature	-5.6 C (21.9 F)	21 of 100 (Routine)
St Fereol	Canada	Record daily precipitation	26.7 mm (1.1 in)	21 of 100 (Routine)
Columbus	United States	Record daily precipitation	36.8 mm (1.4 in)	21 of 100 (Routine)
Crawfordsville Pwr Plt	United States	Record daily precipitation	39.9 mm (1.6 in)	21 of 100 (Routine)
Middleboro	United States	Record daily precipitation	38.1 mm (1.5 in)	21 of 100 (Routine)
St Charles Elm Pt	United States	Record daily precipitation	41.9 mm (1.6 in)	21 of 100 (Routine)
Willow City	United States	Record high minimum temperature	11.1 C (52.0 F)	21 of 100 (Routine)
Purcellville	United States	Record high minimum temperature	16.1 C (61.0 F)	21 of 100 (Routine)
Fogo	Canada	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)

Counts by Type and Timescale

330 records

Records set or tied on 30 April 1947 by type: Highest daily maximum 40, Lowest daily maximum 17, Highest daily minimum 131, Lowest daily minimum 25, Heaviest daily rainfall 113, Heaviest daily snowfall 4.

Records on 30 April 1947 by type
Record type	Records
Highest daily maximum	40
Lowest daily maximum	17
Highest daily minimum	131
Lowest daily minimum	25
Heaviest daily rainfall	113
Heaviest daily snowfall	4
Deepest snow cover	0

Records on 30 April 1947 by timescale: all-time 0, monthly 14, daily 316.

How Much Records Were Beaten By

257 broken records

Margins by which the 257 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 195.0. Ties are not counted.

Top 20 by Significance

30 April 1947

Top 20 records on 30 April 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 April 1947	Baltimore Customs House, US	daily rain	77.7 mm (3.1 in)	55.9 mm (2.2 in)	51 years	62 of 100 (Major)
30 April 1947	Carlisle, US	daily rain	32.5 mm (1.3 in)	17.3 mm (0.7 in)	70 years	45 of 100 (Notable)
30 April 1947	Manistee 3SE, US	daily rain	33.0 mm (1.3 in)	17.8 mm (0.7 in)	49 years	43 of 100 (Notable)
30 April 1947	St Fereol, CA	daily snowfall	20.3 cm (8.0 in)	19.5 cm (7.7 in)	18 years	38 of 100 (Notable)
30 April 1947	Bloomington Normal, US	monthly rain	83.6 mm (3.3 in)	12.0 mm (0.5 in)	42 years	38 of 100 (Notable)
30 April 1947	La Pocatiere Cda, CA	daily low min	-13.9 C (7.0 F)	8.9 C (16.0 F)	32 years	35 of 100 (Notable)
30 April 1947	Philadelphia City, US	monthly rain	84.6 mm (3.3 in)	16.8 mm (0.7 in)	7 years	35 of 100 (Notable)
30 April 1947	Reading Wb City, US	daily rain	35.6 mm (1.4 in)	19.3 mm (0.8 in)	26 years	35 of 100 (Notable)
30 April 1947	Madawaska, CA	daily rain	39.1 mm (1.5 in)	27.4 mm (1.1 in)	22 years	34 of 100 (Routine)
30 April 1947	Lumding, IN	daily rain	50.8 mm (2.0 in)	23.6 mm (0.9 in)	25 years	33 of 100 (Routine)
30 April 1947	Fairview, US	daily rain	35.6 mm (1.4 in)	18.8 mm (0.7 in)	29 years	32 of 100 (Routine)
30 April 1947	Atlantic 1 NE, US	daily rain	30.5 mm (1.2 in)	13.7 mm (0.5 in)	44 years	32 of 100 (Routine)
30 April 1947	Vernal, US	monthly high max	32.8 C (91.0 F)	3.4 C (6.1 F)	37 years	32 of 100 (Routine)
30 April 1947	Digby, CA	daily rain	47.0 mm (1.9 in)	18.8 mm (0.7 in)	24 years	31 of 100 (Routine)
30 April 1947	Prescott 2 NNW, US	daily rain	73.7 mm (2.9 in)	17.6 mm (0.7 in)	53 years	31 of 100 (Routine)
30 April 1947	Major Isidoro (Sertaozinho), BR	daily rain	31.5 mm (1.2 in)	25.8 mm (1.0 in)	26 years	30 of 100 (Routine)
30 April 1947	Channel, CA	daily low min	-9.4 C (15.1 F)	2.7 C (4.9 F)	52 years	30 of 100 (Routine)
30 April 1947	Del Monte, US	monthly high max	32.8 C (91.0 F)	2.8 C (5.0 F)	28 years	30 of 100 (Routine)
30 April 1947	Healdsburg, US	monthly high min	16.1 C (61.0 F)	1.7 C (3.1 F)	33 years	30 of 100 (Routine)
30 April 1947	Jacksonville Wb City, US	daily high min	21.7 C (71.1 F)	0.6 C (1.1 F)	74 years	30 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 1947

Records set or tied on this calendar date in each year from 1795 to 1947. 1947 had 330 records.

Counts for years before the ledger starts come from the same station rules.

Records on 04-30 in each year
Year	Records
1795	1
1804	1
1809	1
1812	1
1814	2
1833	1
1840	1
1848	1
1850	1
1853	1
1854	1
1856	1
1859	1
1862	1
1864	1
1865	1
1866	3
1872	1
1873	1
1874	2
1876	1
1878	4
1879	2
1880	1
1881	1
1882	1
1884	1
1885	1
1886	5
1888	1
1889	1
1891	5
1892	7
1894	1
1895	5
1896	3
1897	2
1898	6
1899	11
1900	4
1901	8
1902	13
1903	21
1904	11
1905	9
1906	16
1907	35
1908	28
1909	74
1910	17
1911	19
1912	18
1913	62
1914	8
1915	20
1916	21
1917	25
1918	28
1919	130
1920	70
1921	54
1922	138
1923	42
1924	96
1925	210
1926	331
1927	127
1928	130
1929	119
1930	232
1931	548
1932	145
1933	422
1934	443
1935	327
1936	373
1937	228
1938	282
1939	268
1940	526
1941	484
1942	1,163
1943	470
1944	286
1945	314
1946	301
1947	330
1948	912
1949	447
1950	671
1951	783
1952	435
1953	635
1954	1,224
1955	1,252
1956	908
1957	401
1958	482
1959	575
1960	507
1961	381
1962	617
1963	730
1964	339
1965	488
1966	740
1967	914
1968	928
1969	587
1970	1,189
1971	365
1972	497
1973	398
1974	822
1975	468
1976	783
1977	525
1978	631
1979	675
1980	545
1981	1,342
1982	504
1983	1,154
1984	1,519
1985	650
1986	660
1987	1,437
1988	808
1989	674
1990	977
1991	828
1992	1,808
1993	765
1994	1,499
1995	1,007
1996	1,637
1997	764
1998	857
1999	1,012
2000	1,046
2001	900
2002	1,171
2003	927
2004	703
2005	1,113
2006	778
2007	996
2008	1,260
2009	660
2010	921
2011	636
2012	819
2013	732
2014	946
2015	380
2016	969
2017	1,450
2018	708
2019	700
2020	1,476
2021	1,167
2022	499
2023	782
2024	705
2025	489
2026	365

Download the Data

Data for records on 1947-04-30: 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 25	247
25 to 50	6
50 to 75	2
75 to 100	0
100 to 125	1
125 to 150	0
150 to 175	0
175 to 200	1