Weather Records on 30 April 1921

54 weather records were set or tied worldwide on 30 April 1921. Highest significance: Lake Cochituate, US.

Key Facts for 30 April 1921

On 30 April 1921, 54 weather records were set or tied at long-record stations worldwide.
16 were record highs and 5 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 52 daily.
Lake Cochituate set a daily record precipitation of 85.9 mm (3.4 in) on 30 April 1921.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 449 records.

Record Map

54 stations

54 station records on 30 April 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 April 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lake Cochituate	United States	Record daily precipitation	85.9 mm (3.4 in)	39 of 100 (Notable)
Black Springs	Australia	Record daily precipitation	30.5 mm (1.2 in)	31 of 100 (Routine)
Stornoway Airport	United Kingdom	Record high maximum temperature	17.8 C (64.0 F)	26 of 100 (Routine)
Hambantota	Sri Lanka	Record low maximum temperature	28.2 C (82.8 F)	24 of 100 (Routine)
Leeu Gamka (Sar)	South Africa	Record daily precipitation	4.6 mm (0.18 in)	20 of 100 (Routine)
De Vlei "de Kruis"	South Africa	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Nieu-Bethesda (Pol)	South Africa	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Koffiefontein (Pol)	South Africa	Record daily precipitation	11.9 mm (0.5 in)	19 of 100 (Routine)
Hanover	United States	Record daily precipitation	29.0 mm (1.1 in)	19 of 100 (Routine)
Pesaro	Italy	Record daily precipitation	19.0 mm (0.7 in)	18 of 100 (Routine)
Tambo Post Office	Australia	Record daily precipitation	3.3 mm (0.13 in)	17 of 100 (Routine)
Durham	United Kingdom	Record high maximum temperature	19.4 C (66.9 F)	17 of 100 (Routine)
Marlborough Post Office	Australia	Record daily precipitation	12.7 mm (0.5 in)	16 of 100 (Routine)
Sandy Cape Lighthouse	Australia	Record daily precipitation	35.6 mm (1.4 in)	15 of 100 (Routine)
Brisbane Regional Office	Australia	Record daily precipitation	15.0 mm (0.6 in)	15 of 100 (Routine)
Cudgen Plantation	Australia	Record daily precipitation	18.0 mm (0.7 in)	15 of 100 (Routine)
Minneapolis Wb Dwtn	United States	Record daily precipitation	15.2 mm (0.6 in)	15 of 100 (Routine)
Southport Ridgeway Ave	Australia	Record daily precipitation	10.9 mm (0.4 in)	14 of 100 (Routine)
Mildura Post Office	Australia	Record high minimum temperature	16.1 C (61.0 F)	14 of 100 (Routine)
Bjuraker	Sweden	Record high maximum temperature	19.0 C (66.2 F)	13 of 100 (Routine)
Uman	Ukraine	Record daily precipitation	10.5 mm (0.4 in)	13 of 100 (Routine)
Tweed Heads Golf Club	Australia	Record daily precipitation	39.4 mm (1.6 in)	12 of 100 (Routine)
Brome	Canada	Record high minimum temperature	16.7 C (62.1 F)	12 of 100 (Routine)
Middleburg	South Africa	Record daily precipitation	5.1 mm (0.20 in)	12 of 100 (Routine)
Burlington	United States	Record daily precipitation	18.0 mm (0.7 in)	12 of 100 (Routine)
Ottawa	Canada	Record high minimum temperature	12.2 C (54.0 F)	11 of 100 (Routine)
Fraserburg	South Africa	Record daily precipitation	4.6 mm (0.18 in)	11 of 100 (Routine)
Sterling	South Africa	Record daily precipitation	13.5 mm (0.5 in)	11 of 100 (Routine)
Astoria	United States	Record low minimum temperature	2.8 C (37.0 F)	11 of 100 (Routine)
Algiers-Ville/Universite	Algeria	Record daily precipitation	7.1 mm (0.28 in)	10 of 100 (Routine)
Cleveland Bowls Club	Australia	Record daily precipitation	10.4 mm (0.4 in)	10 of 100 (Routine)
Ottawa Cda	Canada	Record high minimum temperature	12.8 C (55.0 F)	10 of 100 (Routine)
Umea	Sweden	Record high maximum temperature	15.0 C (59.0 F)	10 of 100 (Routine)
Northfield	United States	Record high minimum temperature	11.1 C (52.0 F)	10 of 100 (Routine)
Tobolsk	Russia	Record low minimum temperature	-8.8 C (16.2 F)	9 of 100 (Routine)
Harpers Ferry River	United States	Record daily precipitation	8.6 mm (0.34 in)	9 of 100 (Routine)
Butterworth (Tnk)	South Africa	Record daily precipitation	7.1 mm (0.28 in)	8 of 100 (Routine)
Hopetown (Tnk)	South Africa	Record daily precipitation	6.4 mm (0.25 in)	8 of 100 (Routine)
Jokkmokk	Sweden	Record high minimum temperature	3.0 C (37.4 F)	8 of 100 (Routine)
Nqamakwe (Tnk)	South Africa	Record daily precipitation	11.4 mm (0.4 in)	7 of 100 (Routine)
Willowvale (Tnk)	South Africa	Record daily precipitation	4.6 mm (0.18 in)	6 of 100 (Routine)
Beenleigh Post Office	Australia	Record daily precipitation	4.3 mm (0.17 in)	4 of 100 (Routine)
Esk Post Office	Australia	Record daily precipitation	6.4 mm (0.25 in)	4 of 100 (Routine)
Nanango Wills St	Australia	Record daily precipitation	4.3 mm (0.17 in)	4 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record high minimum temperature	4.0 C (39.2 F)	4 of 100 (Routine)
Plymouth	United States	Record high minimum temperature	12.2 C (54.0 F)	3 of 100 (Routine)
Rockhampton Post Office	Australia	Record daily precipitation	8.9 mm (0.35 in)	2 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record high maximum temperature	26.1 C (79.0 F)	2 of 100 (Routine)
Saint John	Canada	Record high maximum temperature	17.8 C (64.0 F)	2 of 100 (Routine)
Kentani (Bos)	South Africa	Record daily precipitation	4.3 mm (0.17 in)	2 of 100 (Routine)
Karesuando	Sweden	Record high minimum temperature	1.0 C (33.8 F)	2 of 100 (Routine)
Batesville	United States	Record low minimum temperature	5.0 C (41.0 F)	1 of 100 (Routine)
Jacksonville Wb City	United States	Record low maximum temperature	22.8 C (73.0 F)	1 of 100 (Routine)
Needles	United States	Record high maximum temperature	38.9 C (102.0 F)	0 of 100 (Routine)

Counts by Type and Timescale

54 records

Records set or tied on 30 April 1921 by type: Highest daily maximum 7, Lowest daily maximum 2, Highest daily minimum 9, Lowest daily minimum 3, Heaviest daily rainfall 33.

Records on 30 April 1921 by type
Record type	Records
Highest daily maximum	7
Lowest daily maximum	2
Highest daily minimum	9
Lowest daily minimum	3
Heaviest daily rainfall	33
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 April 1921 by timescale: all-time 0, monthly 2, daily 52.

How Much Records Were Beaten By

44 broken records

Margins by which the 44 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 54.9. Ties are not counted.

Top 20 by Significance

30 April 1921

Top 20 records on 30 April 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 April 1921	Lake Cochituate, US	daily rain	85.9 mm (3.4 in)	54.9 mm (2.2 in)	3 years	39 of 100 (Notable)
30 April 1921	Black Springs, AU	daily rain	30.5 mm (1.2 in)	21.6 mm (0.9 in)	20 years	31 of 100 (Routine)
30 April 1921	Stornoway Airport, GB	daily high max	17.8 C (64.0 F)	2.2 C (4.0 F)	46 years	26 of 100 (Routine)
30 April 1921	Hambantota, LK	daily low max	28.2 C (82.8 F)	0.7 C (1.3 F)	46 years	24 of 100 (Routine)
30 April 1921	Leeu Gamka (Sar), ZA	daily rain	4.6 mm (0.18 in)	4.6 mm (0.18 in)	39 years	20 of 100 (Routine)
30 April 1921	De Vlei "de Kruis", ZA	daily rain	17.3 mm (0.7 in)	10.4 mm (0.4 in)	10 years	20 of 100 (Routine)
30 April 1921	Nieu-Bethesda (Pol), ZA	daily rain	14.5 mm (0.6 in)	5.6 mm (0.22 in)	33 years	20 of 100 (Routine)
30 April 1921	Koffiefontein (Pol), ZA	daily rain	11.9 mm (0.5 in)	7.1 mm (0.28 in)	24 years	19 of 100 (Routine)
30 April 1921	Hanover, US	daily rain	29.0 mm (1.1 in)	8.2 mm (0.32 in)	19 years	19 of 100 (Routine)
30 April 1921	Pesaro, IT	daily rain	19.0 mm (0.7 in)	3.3 mm (0.13 in)	28 years	18 of 100 (Routine)
30 April 1921	Tambo Post Office, AU	daily rain	3.3 mm (0.13 in)	3.3 mm (0.13 in)	42 years	17 of 100 (Routine)
30 April 1921	Durham, GB	daily high max	19.4 C (66.9 F)	0.6 C (1.1 F)	40 years	17 of 100 (Routine)
30 April 1921	Marlborough Post Office, AU	daily rain	12.7 mm (0.5 in)	5.1 mm (0.20 in)	29 years	16 of 100 (Routine)
30 April 1921	Sandy Cape Lighthouse, AU	daily rain	35.6 mm (1.4 in)	11.7 mm (0.5 in)	16 years	15 of 100 (Routine)
30 April 1921	Brisbane Regional Office, AU	daily rain	15.0 mm (0.6 in)	10.9 mm (0.4 in)	0 years	15 of 100 (Routine)
30 April 1921	Cudgen Plantation, AU	daily rain	18.0 mm (0.7 in)	5.3 mm (0.21 in)	34 years	15 of 100 (Routine)
30 April 1921	Minneapolis Wb Dwtn, US	daily rain	15.2 mm (0.6 in)	4.8 mm (0.19 in)	21 years	15 of 100 (Routine)
30 April 1921	Southport Ridgeway Ave, AU	daily rain	10.9 mm (0.4 in)	4.5 mm (0.18 in)	31 years	14 of 100 (Routine)
30 April 1921	Mildura Post Office, AU	daily high min	16.1 C (61.0 F)	1.1 C (2.0 F)	27 years	14 of 100 (Routine)
30 April 1921	Bjuraker, SE	daily high max	19.0 C (66.2 F)	0.5 C (0.9 F)	26 years	13 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 1921

Records set or tied on this calendar date in each year from 1795 to 1921. 1921 had 54 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 1921-04-30: 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 10	38
10 to 20	3
20 to 30	2
30 to 40	0
40 to 50	0
50 to 60	1