Weather Records on 30 May 1930

530 weather records were set or tied worldwide on 30 May 1930. Highest significance: Booroondara Tank, AU.

Key Facts for 30 May 1930

On 30 May 1930, 530 weather records were set or tied at long-record stations worldwide.
20 were record highs and 438 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 528 daily.
Booroondara Tank set a monthly record daily precipitation of 79.2 mm (3.1 in) on 30 May 1930.
Across 165 earlier years (1818 to 2026) the same calendar date averaged 438 records.

Record Map

530 stations

530 station records on 30 May 1930 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 May 1930: highest significance records shown on the map
Station	Country	Type	Value	Significance
Booroondara Tank	Australia	Record daily precipitation	79.2 mm (3.1 in)	64 of 100 (Major)
Uanda	Australia	Record daily precipitation	102.9 mm (4.1 in)	47 of 100 (Notable)
Wupperthal	South Africa	Record daily precipitation	38.1 mm (1.5 in)	46 of 100 (Notable)
Ocala	United States	Record daily precipitation	66.3 mm (2.6 in)	38 of 100 (Notable)
Kissimmee	United States	Record daily precipitation	51.8 mm (2.0 in)	36 of 100 (Notable)
Avon Park 2 W	United States	Record daily precipitation	85.1 mm (3.4 in)	33 of 100 (Routine)
Welbedacht	South Africa	Record daily precipitation	36.3 mm (1.4 in)	32 of 100 (Routine)
Riverside 7 SSW	United States	Record daily precipitation	25.4 mm (1.0 in)	30 of 100 (Routine)
Ft Myers Page Fld AP	United States	Record daily precipitation	97.5 mm (3.8 in)	30 of 100 (Routine)
Pembroke Eddy Match	Canada	Record low maximum temperature	11.7 C (53.1 F)	29 of 100 (Routine)
Brooksville Chin Hill	United States	Record daily precipitation	50.0 mm (2.0 in)	29 of 100 (Routine)
Tarpon Spgs Sewage Plt	United States	Record daily precipitation	52.3 mm (2.1 in)	29 of 100 (Routine)
Joseph	United States	Record daily precipitation	25.4 mm (1.0 in)	29 of 100 (Routine)
Plant City	United States	Record daily precipitation	60.5 mm (2.4 in)	28 of 100 (Routine)
Tarboro 1 S	United States	Record low maximum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Ladismith (Tnk)	South Africa	Record daily precipitation	26.9 mm (1.1 in)	27 of 100 (Routine)
Jamestown	South Africa	Record daily precipitation	26.4 mm (1.0 in)	26 of 100 (Routine)
Thomasville	United States	Record daily precipitation	35.6 mm (1.4 in)	24 of 100 (Routine)
Middletown 4 W	United States	Record low maximum temperature	11.7 C (53.1 F)	24 of 100 (Routine)
Point Pleasant	United States	Record low minimum temperature	1.1 C (34.0 F)	24 of 100 (Routine)
Valley Head	United States	Record low minimum temperature	4.4 C (39.9 F)	23 of 100 (Routine)
Gainesville UNIV of Fl	United States	Record daily precipitation	44.5 mm (1.8 in)	23 of 100 (Routine)
Bardstown	United States	Record low minimum temperature	2.2 C (36.0 F)	23 of 100 (Routine)
Florence #1	United States	Record low maximum temperature	20.0 C (68.0 F)	23 of 100 (Routine)
Newberry	United States	Record low maximum temperature	21.1 C (70.0 F)	23 of 100 (Routine)
Mt Sterling	United States	Record low minimum temperature	1.1 C (34.0 F)	22 of 100 (Routine)
Charlotte Wb City	United States	Record low maximum temperature	17.8 C (64.0 F)	22 of 100 (Routine)
Cheraw	United States	Record low maximum temperature	18.3 C (64.9 F)	22 of 100 (Routine)
Racine Wwtp	United States	Record low minimum temperature	1.7 C (35.1 F)	22 of 100 (Routine)
Middlesboro Fire Dept	United States	Record low maximum temperature	19.4 C (66.9 F)	21 of 100 (Routine)
Raleigh State UNIV	United States	Record low maximum temperature	15.6 C (60.1 F)	21 of 100 (Routine)
Morgantown 1	United States	Record low minimum temperature	0.6 C (33.1 F)	21 of 100 (Routine)
Kennewick	United States	Record daily precipitation	9.4 mm (0.37 in)	20 of 100 (Routine)
Umatilla	United States	Record daily precipitation	9.1 mm (0.36 in)	20 of 100 (Routine)
Moscow U of I	United States	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Ft Bayard 4W	United States	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Grants Pass	United States	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Ritzville 1 SSE	United States	Record daily precipitation	8.1 mm (0.32 in)	20 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record daily precipitation	18.4 mm (0.7 in)	20 of 100 (Routine)
Kelowna	Canada	Record daily precipitation	13.2 mm (0.5 in)	20 of 100 (Routine)
Richmond Post Office	Australia	Record daily precipitation	8.6 mm (0.34 in)	20 of 100 (Routine)
Guelph Oac	Canada	Record low minimum temperature	1.1 C (34.0 F)	20 of 100 (Routine)
Dordrecht - Tnk 14	South Africa	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Buffalo	United States	Record low minimum temperature	1.7 C (35.1 F)	20 of 100 (Routine)
Marietta Wtr Wks	United States	Record low minimum temperature	1.1 C (34.0 F)	20 of 100 (Routine)
Irwin	United States	Record low minimum temperature	-2.2 C (28.0 F)	20 of 100 (Routine)
Mottinger	United States	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Moxee	United States	Record daily precipitation	4.3 mm (0.17 in)	20 of 100 (Routine)
Lyndhurst Station	Australia	Record daily precipitation	3.8 mm (0.15 in)	19 of 100 (Routine)
Muttaburra	Australia	Record daily precipitation	19.1 mm (0.8 in)	19 of 100 (Routine)
Kingston Queens U	Canada	Record low maximum temperature	11.1 C (52.0 F)	19 of 100 (Routine)
Ottawa Cda	Canada	Record low maximum temperature	10.0 C (50.0 F)	19 of 100 (Routine)
Abitibi Post	Canada	Record low maximum temperature	3.9 C (39.0 F)	19 of 100 (Routine)
Grass Valley	United States	Record daily precipitation	15.2 mm (0.6 in)	19 of 100 (Routine)
Eustis 2 S	United States	Record daily precipitation	63.5 mm (2.5 in)	19 of 100 (Routine)
Blakely	United States	Record low minimum temperature	13.3 C (55.9 F)	19 of 100 (Routine)
Hillsboro	United States	Record low minimum temperature	2.2 C (36.0 F)	19 of 100 (Routine)
Lost Creek Near	United States	Record low minimum temperature	-1.1 C (30.0 F)	19 of 100 (Routine)
Yantabulla (Brindingabba)	Australia	Record daily precipitation	15.2 mm (0.6 in)	18 of 100 (Routine)
Ladner	Canada	Record high minimum temperature	14.4 C (57.9 F)	18 of 100 (Routine)

Counts by Type and Timescale

530 records

Records set or tied on 30 May 1930 by type: Highest daily maximum 8, Lowest daily maximum 163, Highest daily minimum 12, Lowest daily minimum 275, Heaviest daily rainfall 72.

Records on 30 May 1930 by type
Record type	Records
Highest daily maximum	8
Lowest daily maximum	163
Highest daily minimum	12
Lowest daily minimum	275
Heaviest daily rainfall	72
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 May 1930 by timescale: all-time 0, monthly 2, daily 528.

How Much Records Were Beaten By

424 broken records

Margins by which the 424 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 49.5. Ties are not counted.

Top 20 by Significance

30 May 1930

Top 20 records on 30 May 1930 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 May 1930	Booroondara Tank, AU	monthly rain	79.2 mm (3.1 in)	42.4 mm (1.7 in)	35 years	64 of 100 (Major)
30 May 1930	Uanda, AU	monthly rain	102.9 mm (4.1 in)	35.3 mm (1.4 in)	27 years	47 of 100 (Notable)
30 May 1930	Wupperthal, ZA	daily rain	38.1 mm (1.5 in)	29.0 mm (1.1 in)	34 years	46 of 100 (Notable)
30 May 1930	Ocala, US	daily rain	66.3 mm (2.6 in)	45.0 mm (1.8 in)	20 years	38 of 100 (Notable)
30 May 1930	Kissimmee, US	daily rain	51.8 mm (2.0 in)	40.1 mm (1.6 in)	37 years	36 of 100 (Notable)
30 May 1930	Avon Park 2 W, US	daily rain	85.1 mm (3.4 in)	49.5 mm (1.9 in)	1 year	33 of 100 (Routine)
30 May 1930	Welbedacht, ZA	daily rain	36.3 mm (1.4 in)	22.1 mm (0.9 in)	12 years	32 of 100 (Routine)
30 May 1930	Riverside 7 SSW, US	daily rain	25.4 mm (1.0 in)	15.2 mm (0.6 in)	8 years	30 of 100 (Routine)
30 May 1930	Ft Myers Page Fld AP, US	daily rain	97.5 mm (3.8 in)	35.5 mm (1.4 in)	8 years	30 of 100 (Routine)
30 May 1930	Pembroke Eddy Match, CA	daily low max	11.7 C (53.1 F)	3.3 C (5.9 F)	62 years	29 of 100 (Routine)
30 May 1930	Brooksville Chin Hill, US	daily rain	50.0 mm (2.0 in)	30.2 mm (1.2 in)	28 years	29 of 100 (Routine)
30 May 1930	Tarpon Spgs Sewage Plt, US	daily rain	52.3 mm (2.1 in)	43.9 mm (1.7 in)	11 years	29 of 100 (Routine)
30 May 1930	Joseph, US	daily rain	25.4 mm (1.0 in)	10.2 mm (0.4 in)	24 years	29 of 100 (Routine)
30 May 1930	Plant City, US	daily rain	60.5 mm (2.4 in)	43.7 mm (1.7 in)	1 year	28 of 100 (Routine)
30 May 1930	Tarboro 1 S, US	daily low max	16.7 C (62.1 F)	7.7 C (13.9 F)	28 years	28 of 100 (Routine)
30 May 1930	Ladismith (Tnk), ZA	daily rain	26.9 mm (1.1 in)	10.6 mm (0.4 in)	44 years	27 of 100 (Routine)
30 May 1930	Jamestown, ZA	daily rain	26.4 mm (1.0 in)	12.4 mm (0.5 in)	24 years	26 of 100 (Routine)
30 May 1930	Thomasville, US	daily rain	35.6 mm (1.4 in)	25.4 mm (1.0 in)	27 years	24 of 100 (Routine)
30 May 1930	Middletown 4 W, US	daily low max	11.7 C (53.1 F)	2.2 C (4.0 F)	51 years	24 of 100 (Routine)
30 May 1930	Point Pleasant, US	daily low min	1.1 C (34.0 F)	5.6 C (10.1 F)	32 years	24 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

1818 to 1930

Records set or tied on this calendar date in each year from 1818 to 1930. 1930 had 530 records.

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

Records on 05-30 in each year
Year	Records
1818	3
1844	1
1847	1
1848	1
1852	1
1853	1
1855	1
1856	1
1858	1
1860	2
1863	1
1864	1
1865	4
1867	1
1868	4
1870	1
1871	2
1873	4
1878	1
1879	1
1880	2
1881	1
1882	2
1883	1
1884	2
1885	1
1886	1
1887	1
1889	3
1890	1
1891	1
1892	2
1893	7
1894	2
1895	5
1896	1
1897	1
1898	2
1899	4
1900	1
1901	4
1902	9
1903	12
1904	7
1905	20
1906	8
1907	20
1908	32
1909	6
1910	22
1911	22
1912	26
1913	89
1914	25
1915	32
1916	41
1917	42
1918	31
1919	90
1920	28
1921	392
1922	72
1923	121
1924	187
1925	190
1926	201
1927	177
1928	86
1929	368
1930	530
1931	316
1932	256
1933	250
1934	731
1935	88
1936	579
1937	440
1938	309
1939	336
1940	289
1941	518
1942	500
1943	444
1944	325
1945	383
1946	310
1947	880
1948	386
1949	318
1950	376
1951	448
1952	295
1953	622
1954	271
1955	377
1956	466
1957	267
1958	480
1959	419
1960	274
1961	657
1962	454
1963	245
1964	709
1965	454
1966	326
1967	859
1968	357
1969	1,092
1970	483
1971	1,044
1972	721
1973	391
1974	631
1975	776
1976	499
1977	444
1978	888
1979	1,185
1980	650
1981	1,001
1982	981
1983	1,310
1984	2,543
1985	772
1986	1,264
1987	1,021
1988	1,371
1989	1,021
1990	983
1991	1,264
1992	1,413
1993	690
1994	834
1995	777
1996	893
1997	936
1998	1,190
1999	1,113
2000	1,391
2001	854
2002	940
2003	1,110
2004	1,219
2005	737
2006	1,179
2007	1,128
2008	829
2009	480
2010	771
2011	1,914
2012	720
2013	821
2014	551
2015	699
2016	540
2017	657
2018	1,319
2019	706
2020	920
2021	841
2022	1,034
2023	344
2024	600
2025	828
2026	525

Download the Data

Data for records on 1930-05-30: 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	402
10 to 20	7
20 to 30	6
30 to 40	3
40 to 50	6