Weather Records on 11 August 1930

471 weather records were set or tied worldwide on 11 August 1930. Highest significance: Butterworth (Tnk), ZA.

Key Facts for 11 August 1930

On 11 August 1930, 471 weather records were set or tied at long-record stations worldwide.
96 were record highs and 229 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 23 monthly and 447 daily.
Butterworth (Tnk) set a monthly record daily precipitation of 72.6 mm (2.9 in) on 11 August 1930.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 461 records.

Record Map

471 stations

471 station records on 11 August 1930 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 August 1930: highest significance records shown on the map
Station	Country	Type	Value	Significance
Butterworth (Tnk)	South Africa	Record daily precipitation	72.6 mm (2.9 in)	60 of 100 (Major)
Grahamstown	South Africa	Record daily precipitation	45.7 mm (1.8 in)	56 of 100 (Notable)
Dontsa	South Africa	Record daily precipitation	58.9 mm (2.3 in)	55 of 100 (Notable)
Crawley	South Africa	Record daily precipitation	33.3 mm (1.3 in)	55 of 100 (Notable)
Kentani (Bos)	South Africa	Record daily precipitation	65.3 mm (2.6 in)	55 of 100 (Notable)
Pirie (Bos)	South Africa	Record daily precipitation	48.3 mm (1.9 in)	54 of 100 (Notable)
Katberg (Bos)	South Africa	Record daily precipitation	42.7 mm (1.7 in)	53 of 100 (Notable)
Dordrecht - Tnk 14	South Africa	Record daily precipitation	42.2 mm (1.7 in)	53 of 100 (Notable)
Mount Coke (Bos)	South Africa	Record daily precipitation	61.0 mm (2.4 in)	52 of 100 (Notable)
Komga (Pol)	South Africa	Record daily precipitation	67.3 mm (2.6 in)	52 of 100 (Notable)
Lady Frere (Tnk)	South Africa	Record daily precipitation	42.4 mm (1.7 in)	52 of 100 (Notable)
Wolfridge (Bos)	South Africa	Record daily precipitation	45.7 mm (1.8 in)	51 of 100 (Notable)
Hogsback (Bos)	South Africa	Record daily precipitation	74.7 mm (2.9 in)	47 of 100 (Notable)
Kei Road (Pol)	South Africa	Record daily precipitation	50.0 mm (2.0 in)	47 of 100 (Notable)
Barkly East	South Africa	Record daily precipitation	38.1 mm (1.5 in)	47 of 100 (Notable)
Cheviot Fells	South Africa	Record daily precipitation	26.4 mm (1.0 in)	46 of 100 (Notable)
Jamestown	South Africa	Record daily precipitation	55.9 mm (2.2 in)	46 of 100 (Notable)
Qacu (Bos)	South Africa	Record daily precipitation	47.0 mm (1.9 in)	45 of 100 (Notable)
Yardley Chase	South Africa	Record daily precipitation	40.6 mm (1.6 in)	44 of 100 (Notable)
Cofimvaba (Tnk)	South Africa	Record daily precipitation	38.1 mm (1.5 in)	44 of 100 (Notable)
Elliotdale (Tnk)	South Africa	Record daily precipitation	39.4 mm (1.6 in)	44 of 100 (Notable)
Willowvale (Tnk)	South Africa	Record daily precipitation	58.2 mm (2.3 in)	43 of 100 (Notable)
Contest	South Africa	Record daily precipitation	36.8 mm (1.4 in)	43 of 100 (Notable)
Tsomo (Pol)	South Africa	Record daily precipitation	43.4 mm (1.7 in)	41 of 100 (Notable)
Arhangelsk	Russia	Record daily precipitation	25.0 mm (1.0 in)	40 of 100 (Notable)
Moe Gippsland Water	Australia	Record daily precipitation	34.0 mm (1.3 in)	36 of 100 (Notable)
Nerchinskij Zavod	Russia	Record daily precipitation	69.4 mm (2.7 in)	36 of 100 (Notable)
Isidinge (Bos)	South Africa	Record daily precipitation	87.9 mm (3.5 in)	36 of 100 (Notable)
Carcoar	Australia	Record daily precipitation	30.0 mm (1.2 in)	33 of 100 (Routine)
Buffelsnek (Bos)	South Africa	Record daily precipitation	78.2 mm (3.1 in)	33 of 100 (Routine)
Peddie (Mag)	South Africa	Record daily precipitation	55.4 mm (2.2 in)	33 of 100 (Routine)
Petropavlovskij Majak	Russia	Record daily precipitation	34.5 mm (1.4 in)	32 of 100 (Routine)
Petropavlovsk-Kamchatskij	Russia	Record daily precipitation	34.5 mm (1.4 in)	32 of 100 (Routine)
Queenstown	South Africa	Record daily precipitation	28.4 mm (1.1 in)	31 of 100 (Routine)
Lugansk	Ukraine	Record high minimum temperature	25.6 C (78.1 F)	31 of 100 (Routine)
Nqamakwe (Tnk)	South Africa	Record daily precipitation	31.8 mm (1.3 in)	30 of 100 (Routine)
Engcobo (Tnk)	South Africa	Record daily precipitation	29.2 mm (1.1 in)	30 of 100 (Routine)
Ida	South Africa	Record daily precipitation	30.5 mm (1.2 in)	30 of 100 (Routine)
Knysna (Tnk)	South Africa	Record daily precipitation	43.9 mm (1.7 in)	29 of 100 (Routine)
Humansdorp (Pol)	South Africa	Record daily precipitation	32.0 mm (1.3 in)	29 of 100 (Routine)
Dohne (Sar)	South Africa	Record daily precipitation	32.8 mm (1.3 in)	29 of 100 (Routine)
Pembroke Eddy Match	Canada	Record low maximum temperature	18.3 C (64.9 F)	28 of 100 (Routine)
Balfour (Pol)	South Africa	Record daily precipitation	39.6 mm (1.6 in)	28 of 100 (Routine)
Thomas River (Sar)	South Africa	Record daily precipitation	39.4 mm (1.6 in)	28 of 100 (Routine)
Bisbee	United States	Record low maximum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Ashton 1N	United States	Record high minimum temperature	17.2 C (63.0 F)	28 of 100 (Routine)
Herefoss	Norway	Record daily precipitation	43.0 mm (1.7 in)	27 of 100 (Routine)
Seymour (Mag)	South Africa	Record daily precipitation	34.0 mm (1.3 in)	27 of 100 (Routine)
Selma	United States	Record daily precipitation	52.3 mm (2.1 in)	27 of 100 (Routine)
Mc Cool Junction	United States	Record daily precipitation	101.6 mm (4.0 in)	27 of 100 (Routine)
Gembrook	Australia	Record daily precipitation	31.8 mm (1.3 in)	26 of 100 (Routine)
Ottawa	Canada	Record low minimum temperature	5.6 C (42.1 F)	26 of 100 (Routine)
Lottering (Bos)	South Africa	Record daily precipitation	72.1 mm (2.8 in)	25 of 100 (Routine)
Escondido	United States	Record low maximum temperature	23.9 C (75.0 F)	25 of 100 (Routine)
Bellefontaine	United States	Record low maximum temperature	16.7 C (62.1 F)	25 of 100 (Routine)
Portland Rfc City	United States	Record high minimum temperature	20.0 C (68.0 F)	25 of 100 (Routine)
Kingston Queens U	Canada	Record low maximum temperature	17.8 C (64.0 F)	24 of 100 (Routine)
Rutherglen	Canada	Record low maximum temperature	13.3 C (55.9 F)	23 of 100 (Routine)
Sotchi	Russia	Record high minimum temperature	26.0 C (78.8 F)	23 of 100 (Routine)
Alexandria (Pol)	South Africa	Record daily precipitation	43.4 mm (1.7 in)	23 of 100 (Routine)

Counts by Type and Timescale

471 records

Records set or tied on 11 August 1930 by type: Highest daily maximum 33, Lowest daily maximum 71, Highest daily minimum 63, Lowest daily minimum 158, Heaviest daily rainfall 146.

Records on 11 August 1930 by type
Record type	Records
Highest daily maximum	33
Lowest daily maximum	71
Highest daily minimum	63
Lowest daily minimum	158
Heaviest daily rainfall	146
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 August 1930 by timescale: all-time 1, monthly 23, daily 447.

How Much Records Were Beaten By

360 broken records

Margins by which the 360 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.0. Ties are not counted.

Top 20 by Significance

11 August 1930

Top 20 records on 11 August 1930 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 August 1930	Butterworth (Tnk), ZA	monthly rain	72.6 mm (2.9 in)	26.4 mm (1.0 in)	38 years	60 of 100 (Major)
11 August 1930	Grahamstown, ZA	daily rain	45.7 mm (1.8 in)	33.3 mm (1.3 in)	49 years	56 of 100 (Notable)
11 August 1930	Dontsa, ZA	monthly rain	58.9 mm (2.3 in)	24.6 mm (1.0 in)	15 years	55 of 100 (Notable)
11 August 1930	Crawley, ZA	daily rain	33.3 mm (1.3 in)	30.5 mm (1.2 in)	39 years	55 of 100 (Notable)
11 August 1930	Kentani (Bos), ZA	daily rain	65.3 mm (2.6 in)	56.2 mm (2.2 in)	39 years	55 of 100 (Notable)
11 August 1930	Pirie (Bos), ZA	daily rain	48.3 mm (1.9 in)	31.8 mm (1.3 in)	33 years	54 of 100 (Notable)
11 August 1930	Katberg (Bos), ZA	daily rain	42.7 mm (1.7 in)	30.0 mm (1.2 in)	47 years	53 of 100 (Notable)
11 August 1930	Dordrecht - Tnk 14, ZA	daily rain	42.2 mm (1.7 in)	34.8 mm (1.4 in)	28 years	53 of 100 (Notable)
11 August 1930	Mount Coke (Bos), ZA	daily rain	61.0 mm (2.4 in)	61.0 mm (2.4 in)	30 years	52 of 100 (Notable)
11 August 1930	Komga (Pol), ZA	daily rain	67.3 mm (2.6 in)	56.6 mm (2.2 in)	28 years	52 of 100 (Notable)
11 August 1930	Lady Frere (Tnk), ZA	daily rain	42.4 mm (1.7 in)	40.6 mm (1.6 in)	28 years	52 of 100 (Notable)
11 August 1930	Wolfridge (Bos), ZA	daily rain	45.7 mm (1.8 in)	40.6 mm (1.6 in)	28 years	51 of 100 (Notable)
11 August 1930	Hogsback (Bos), ZA	monthly rain	74.7 mm (2.9 in)	22.4 mm (0.9 in)	41 years	47 of 100 (Notable)
11 August 1930	Kei Road (Pol), ZA	daily rain	50.0 mm (2.0 in)	26.9 mm (1.1 in)	47 years	47 of 100 (Notable)
11 August 1930	Barkly East, ZA	daily rain	38.1 mm (1.5 in)	24.6 mm (1.0 in)	39 years	47 of 100 (Notable)
11 August 1930	Cheviot Fells, ZA	daily rain	26.4 mm (1.0 in)	24.9 mm (1.0 in)	8 years	46 of 100 (Notable)
11 August 1930	Jamestown, ZA	daily rain	55.9 mm (2.2 in)	40.7 mm (1.6 in)	4 years	46 of 100 (Notable)
11 August 1930	Qacu (Bos), ZA	daily rain	47.0 mm (1.9 in)	36.6 mm (1.4 in)	5 years	45 of 100 (Notable)
11 August 1930	Yardley Chase, ZA	monthly rain	40.6 mm (1.6 in)	10.1 mm (0.4 in)	39 years	44 of 100 (Notable)
11 August 1930	Cofimvaba (Tnk), ZA	daily rain	38.1 mm (1.5 in)	35.6 mm (1.4 in)	5 years	44 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

1793 to 1930

Records set or tied on this calendar date in each year from 1793 to 1930. 1930 had 471 records.

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

Records on 08-11 in each year
Year	Records
1793	1
1796	1
1811	1
1815	2
1838	1
1839	1
1841	1
1851	1
1855	1
1858	1
1861	2
1862	1
1863	1
1864	6
1865	1
1866	6
1869	4
1871	1
1875	1
1879	2
1881	1
1883	1
1885	1
1888	1
1889	4
1890	4
1891	1
1892	4
1893	1
1894	1
1895	2
1896	5
1897	3
1898	2
1899	3
1900	4
1901	4
1902	13
1903	12
1904	19
1905	9
1906	6
1907	8
1908	10
1909	41
1910	9
1911	24
1912	46
1913	43
1914	26
1915	27
1916	64
1917	217
1918	29
1919	18
1920	54
1921	201
1922	98
1923	80
1924	149
1925	219
1926	140
1927	190
1928	174
1929	354
1930	471
1931	453
1932	281
1933	416
1934	620
1935	499
1936	541
1937	356
1938	315
1939	389
1940	359
1941	807
1942	390
1943	345
1944	936
1945	401
1946	419
1947	709
1948	306
1949	471
1950	320
1951	296
1952	417
1953	283
1954	536
1955	319
1956	457
1957	305
1958	494
1959	337
1960	461
1961	429
1962	662
1963	493
1964	677
1965	793
1966	1,037
1967	1,071
1968	619
1969	533
1970	526
1971	711
1972	823
1973	451
1974	596
1975	753
1976	529
1977	845
1978	433
1979	797
1980	929
1981	645
1982	1,232
1983	1,095
1984	822
1985	804
1986	563
1987	885
1988	1,119
1989	983
1990	760
1991	822
1992	928
1993	840
1994	1,173
1995	1,324
1996	1,147
1997	1,512
1998	1,232
1999	1,152
2000	924
2001	811
2002	1,152
2003	1,601
2004	1,478
2005	1,031
2006	896
2007	1,428
2008	945
2009	836
2010	2,289
2011	1,106
2012	953
2013	470
2014	556
2015	696
2016	1,340
2017	619
2018	861
2019	758
2020	688
2021	834
2022	661
2023	757
2024	643
2025	722
2026	765

Download the Data

Data for records on 1930-08-11: 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	299
10 to 20	27
20 to 30	17
30 to 40	10
40 to 50	4
50 to 60	2
60 to 70	1