Weather Records on 30 April 1940

526 weather records were set or tied worldwide on 30 April 1940. Highest significance: Centralia, US.

Key Facts for 30 April 1940

On 30 April 1940, 526 weather records were set or tied at long-record stations worldwide.
56 were record highs and 72 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 6 monthly and 520 daily.
Centralia set a daily record precipitation of 37.8 mm (1.5 in) on 30 April 1940.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 446 records.

Record Map

526 stations

526 station records on 30 April 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 April 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Centralia	United States	Record daily precipitation	37.8 mm (1.5 in)	55 of 100 (Notable)
Ashbourne	Australia	Record daily precipitation	38.9 mm (1.5 in)	53 of 100 (Notable)
St Joseph 3 N	United States	Record daily precipitation	127.8 mm (5.0 in)	50 of 100 (Notable)
Aberdeen	United States	Record daily precipitation	62.2 mm (2.4 in)	49 of 100 (Notable)
Portland Rfc City	United States	Record daily precipitation	27.9 mm (1.1 in)	48 of 100 (Notable)
Esquimalt	Canada	Record daily precipitation	25.1 mm (1.0 in)	47 of 100 (Notable)
Lafayette Rgnl AP	United States	Record daily precipitation	96.0 mm (3.8 in)	46 of 100 (Notable)
Godda	India	Record daily precipitation	38.1 mm (1.5 in)	45 of 100 (Notable)
Milnes Landing	Canada	Record daily precipitation	30.7 mm (1.2 in)	44 of 100 (Notable)
Jamalpur	India	Record daily precipitation	33.8 mm (1.3 in)	43 of 100 (Notable)
Mc Minnville	United States	Record daily precipitation	31.2 mm (1.2 in)	43 of 100 (Notable)
Bremerton	United States	Record daily precipitation	34.3 mm (1.4 in)	43 of 100 (Notable)
Clinton 1SSW	United States	Record daily precipitation	52.1 mm (2.1 in)	42 of 100 (Notable)
Utica	United States	Record daily precipitation	108.0 mm (4.3 in)	41 of 100 (Notable)
Port Gibson 1 NE	United States	Record daily precipitation	94.0 mm (3.7 in)	40 of 100 (Notable)
Hood Rvr Exp STN	United States	Record daily precipitation	25.1 mm (1.0 in)	40 of 100 (Notable)
Vashon Island	United States	Record daily precipitation	36.3 mm (1.4 in)	39 of 100 (Notable)
Seattle Urban Site	United States	Record daily precipitation	27.9 mm (1.1 in)	39 of 100 (Notable)
Decatur Wtp	United States	Record daily precipitation	41.7 mm (1.6 in)	37 of 100 (Notable)
Schreiber	Canada	Record daily snowfall	7.6 cm (3.0 in)	34 of 100 (Routine)
Sunticoppa	India	Record daily precipitation	38.9 mm (1.5 in)	34 of 100 (Routine)
Astoria	United States	Record daily precipitation	61.0 mm (2.4 in)	34 of 100 (Routine)
Udayagiri	India	Record daily precipitation	36.8 mm (1.4 in)	33 of 100 (Routine)
Sriperumbudur	India	Record daily precipitation	28.4 mm (1.1 in)	33 of 100 (Routine)
Cape Town Maitland (Cem)	South Africa	Record daily precipitation	27.4 mm (1.1 in)	33 of 100 (Routine)
Cairo 3N	United States	Record daily precipitation	69.1 mm (2.7 in)	33 of 100 (Routine)
Lobethal	Australia	Record daily precipitation	40.6 mm (1.6 in)	32 of 100 (Routine)
Saltspring Island	Canada	Record daily precipitation	31.2 mm (1.2 in)	31 of 100 (Routine)
Vancouver 4 NNE	United States	Record daily precipitation	31.0 mm (1.2 in)	31 of 100 (Routine)
Willapa Harbor	United States	Record daily precipitation	54.6 mm (2.1 in)	31 of 100 (Routine)
Chilliwack	Canada	Record daily precipitation	26.4 mm (1.0 in)	30 of 100 (Routine)
Mayuram	India	Record daily precipitation	68.6 mm (2.7 in)	30 of 100 (Routine)
Forest Grove	United States	Record daily precipitation	30.0 mm (1.2 in)	29 of 100 (Routine)
Cape Northumberland	Australia	Record daily precipitation	25.4 mm (1.0 in)	28 of 100 (Routine)
Santa Maria	United States	Record high maximum temperature	29.4 C (84.9 F)	28 of 100 (Routine)
Meadows	Australia	Record daily precipitation	39.1 mm (1.5 in)	27 of 100 (Routine)
Uraidla	Australia	Record daily precipitation	44.2 mm (1.7 in)	27 of 100 (Routine)
Laurel	United States	Record daily precipitation	132.1 mm (5.2 in)	27 of 100 (Routine)
Dingo Vale	Australia	Record daily precipitation	41.7 mm (1.6 in)	26 of 100 (Routine)
Macclesfield	Australia	Record daily precipitation	29.0 mm (1.1 in)	26 of 100 (Routine)
Williamstown	Australia	Record daily precipitation	27.4 mm (1.1 in)	26 of 100 (Routine)
Paraiyahat	India	Record daily precipitation	42.7 mm (1.7 in)	26 of 100 (Routine)
Sivakasi	India	Record daily precipitation	50.3 mm (2.0 in)	26 of 100 (Routine)
Kamennaja-Step	Russia	Record low maximum temperature	1.5 C (34.7 F)	26 of 100 (Routine)
Stellenbosch (Tnk)	South Africa	Record daily precipitation	30.0 mm (1.2 in)	26 of 100 (Routine)
Derby	South Africa	Record daily precipitation	32.5 mm (1.3 in)	26 of 100 (Routine)
Lyndoch (Pewsey Vale)	Australia	Record daily precipitation	25.4 mm (1.0 in)	25 of 100 (Routine)
Ashton 1	Australia	Record daily precipitation	35.1 mm (1.4 in)	25 of 100 (Routine)
Bridgewater	Australia	Record daily precipitation	43.9 mm (1.7 in)	25 of 100 (Routine)
Gumeracha	Australia	Record daily precipitation	28.2 mm (1.1 in)	25 of 100 (Routine)
Mount Lofty Summit	Australia	Record daily precipitation	44.7 mm (1.8 in)	25 of 100 (Routine)
Stirling	Australia	Record daily precipitation	46.2 mm (1.8 in)	25 of 100 (Routine)
Mount Gambier Post Office	Australia	Record daily precipitation	28.7 mm (1.1 in)	25 of 100 (Routine)
Southampton	Canada	Record high minimum temperature	12.2 C (54.0 F)	25 of 100 (Routine)
Ponce 4 E	Puerto Rico [United States]	Record high maximum temperature	33.3 C (91.9 F)	25 of 100 (Routine)
Jamui	India	Record daily precipitation	48.0 mm (1.9 in)	24 of 100 (Routine)
Brookhaven City	United States	Record daily precipitation	53.1 mm (2.1 in)	24 of 100 (Routine)
Hahndorf	Australia	Record daily precipitation	29.0 mm (1.1 in)	23 of 100 (Routine)
Stave Falls	Canada	Record daily precipitation	31.0 mm (1.2 in)	23 of 100 (Routine)
Echunga Golf Course	Australia	Record daily precipitation	30.0 mm (1.2 in)	22 of 100 (Routine)

Counts by Type and Timescale

526 records

Records set or tied on 30 April 1940 by type: Highest daily maximum 27, Lowest daily maximum 51, Highest daily minimum 29, Lowest daily minimum 21, Heaviest daily rainfall 394, Heaviest daily snowfall 3, Deepest snow cover 1.

Records on 30 April 1940 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	51
Highest daily minimum	29
Lowest daily minimum	21
Heaviest daily rainfall	394
Heaviest daily snowfall	3
Deepest snow cover	1

Records on 30 April 1940 by timescale: all-time 0, monthly 6, daily 520.

How Much Records Were Beaten By

473 broken records

Margins by which the 473 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 103.4. Ties are not counted.

Top 20 by Significance

30 April 1940

Top 20 records on 30 April 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 April 1940	Centralia, US	daily rain	37.8 mm (1.5 in)	28.1 mm (1.1 in)	38 years	55 of 100 (Notable)
30 April 1940	Ashbourne, AU	daily rain	38.9 mm (1.5 in)	31.3 mm (1.2 in)	47 years	53 of 100 (Notable)
30 April 1940	St Joseph 3 N, US	daily rain	127.8 mm (5.0 in)	103.4 mm (4.1 in)	21 years	50 of 100 (Notable)
30 April 1940	Aberdeen, US	daily rain	62.2 mm (2.4 in)	41.9 mm (1.6 in)	23 years	49 of 100 (Notable)
30 April 1940	Portland Rfc City, US	daily rain	27.9 mm (1.1 in)	12.9 mm (0.5 in)	65 years	48 of 100 (Notable)
30 April 1940	Esquimalt, CA	daily rain	25.1 mm (1.0 in)	13.7 mm (0.5 in)	48 years	47 of 100 (Notable)
30 April 1940	Lafayette Rgnl AP, US	daily rain	96.0 mm (3.8 in)	64.0 mm (2.5 in)	35 years	46 of 100 (Notable)
30 April 1940	Godda, IN	daily rain	38.1 mm (1.5 in)	31.7 mm (1.2 in)	22 years	45 of 100 (Notable)
30 April 1940	Milnes Landing, CA	daily rain	30.7 mm (1.2 in)	18.0 mm (0.7 in)	28 years	44 of 100 (Notable)
30 April 1940	Jamalpur, IN	daily rain	33.8 mm (1.3 in)	33.5 mm (1.3 in)	33 years	43 of 100 (Notable)
30 April 1940	Mc Minnville, US	daily rain	31.2 mm (1.2 in)	21.8 mm (0.9 in)	12 years	43 of 100 (Notable)
30 April 1940	Bremerton, US	daily rain	34.3 mm (1.4 in)	23.9 mm (0.9 in)	7 years	43 of 100 (Notable)
30 April 1940	Clinton 1SSW, US	daily rain	52.1 mm (2.1 in)	40.4 mm (1.6 in)	7 years	42 of 100 (Notable)
30 April 1940	Utica, US	daily rain	108.0 mm (4.3 in)	65.3 mm (2.6 in)	29 years	41 of 100 (Notable)
30 April 1940	Port Gibson 1 NE, US	daily rain	94.0 mm (3.7 in)	62.0 mm (2.4 in)	35 years	40 of 100 (Notable)
30 April 1940	Hood Rvr Exp STN, US	daily rain	25.1 mm (1.0 in)	13.7 mm (0.5 in)	39 years	40 of 100 (Notable)
30 April 1940	Vashon Island, US	daily rain	36.3 mm (1.4 in)	21.8 mm (0.9 in)	12 years	39 of 100 (Notable)
30 April 1940	Seattle Urban Site, US	daily rain	27.9 mm (1.1 in)	16.5 mm (0.6 in)	12 years	39 of 100 (Notable)
30 April 1940	Decatur Wtp, US	daily rain	41.7 mm (1.6 in)	20.6 mm (0.8 in)	44 years	37 of 100 (Notable)
30 April 1940	Schreiber, CA	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	46 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 1940

Records set or tied on this calendar date in each year from 1795 to 1940. 1940 had 526 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 1940-04-30: 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 20	440
20 to 40	24
40 to 60	2
60 to 80	5
80 to 100	1
100 to 120	1