Weather Records on 20 August 1909

69 weather records were set or tied worldwide on 20 August 1909. Highest significance: Ballan, AU.

Key Facts for 20 August 1909

On 20 August 1909, 69 weather records were set or tied at long-record stations worldwide.
5 were record highs and 0 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 14 monthly and 54 daily.
Ballan set a monthly record daily precipitation of 61.0 mm (2.4 in) on 20 August 1909.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 457 records.

Record Map

69 stations

69 station records on 20 August 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 1909: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ballan	Australia	Record daily precipitation	61.0 mm (2.4 in)	62 of 100 (Major)
Ararat Post Office	Australia	Record daily precipitation	71.4 mm (2.8 in)	61 of 100 (Major)
Clunes	Australia	Record daily precipitation	54.4 mm (2.1 in)	60 of 100 (Major)
Mount Bute	Australia	Record daily precipitation	58.9 mm (2.3 in)	59 of 100 (Notable)
Maryborough	Australia	Record daily precipitation	55.1 mm (2.2 in)	58 of 100 (Notable)
Daylesford	Australia	Record daily precipitation	77.5 mm (3.1 in)	54 of 100 (Notable)
Castlemaine	Australia	Record daily precipitation	74.2 mm (2.9 in)	53 of 100 (Notable)
Smeaton Weir	Australia	Record daily precipitation	56.6 mm (2.2 in)	52 of 100 (Notable)
Kyneton Post Office	Australia	Record daily precipitation	87.6 mm (3.4 in)	52 of 100 (Notable)
Maldon (Derby Hill)	Australia	Record daily precipitation	64.0 mm (2.5 in)	52 of 100 (Notable)
Sunbury (Salesian College )	Australia	Record daily precipitation	44.5 mm (1.8 in)	51 of 100 (Notable)
Berrybank	Australia	Record daily precipitation	39.9 mm (1.6 in)	51 of 100 (Notable)
Newlyn Reservoir	Australia	Record daily precipitation	74.4 mm (2.9 in)	49 of 100 (Notable)
Warracknabeal Post Office	Australia	Record daily precipitation	26.7 mm (1.1 in)	47 of 100 (Notable)
Horsham Polkemmet Rd	Australia	Record daily precipitation	34.5 mm (1.4 in)	47 of 100 (Notable)
Hamilton	Australia	Record daily precipitation	26.9 mm (1.1 in)	44 of 100 (Notable)
Geelong Sec	Australia	Record daily precipitation	36.8 mm (1.4 in)	43 of 100 (Notable)
Scotsburn (Mount Boninyong)	Australia	Record daily precipitation	52.8 mm (2.1 in)	40 of 100 (Notable)
Kaarimba	Australia	Record daily precipitation	27.7 mm (1.1 in)	38 of 100 (Notable)
Hastings Post Office	Australia	Record daily precipitation	42.2 mm (1.7 in)	35 of 100 (Notable)
Bendigo Prison	Australia	Record daily precipitation	51.3 mm (2.0 in)	33 of 100 (Routine)
Stawell	Australia	Record daily precipitation	42.4 mm (1.7 in)	31 of 100 (Routine)
Blackwood	Australia	Record daily precipitation	52.3 mm (2.1 in)	31 of 100 (Routine)
Melbourne Regional Office	Australia	Record daily precipitation	32.0 mm (1.3 in)	30 of 100 (Routine)
Deniliquin (Wilkinson St)	Australia	Record daily precipitation	27.9 mm (1.1 in)	27 of 100 (Routine)
Werribee (Wyndham)	Australia	Record daily precipitation	30.5 mm (1.2 in)	24 of 100 (Routine)
Winbar	Australia	Record daily precipitation	25.4 mm (1.0 in)	21 of 100 (Routine)
Rokewood (the Meadows)	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Barellan Post Office	Australia	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Swan Hill (Murray Downs)	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Adelaide West Terrace	Australia	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Dumble	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Omeo Comparison	Australia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Alexandra (Post Office)	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Round Hill	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Yan Yean	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Bourke Post Office	Australia	Record daily precipitation	27.2 mm (1.1 in)	20 of 100 (Routine)
Clare Post Office	Australia	Record daily precipitation	14.0 mm (0.6 in)	19 of 100 (Routine)
Balranald (Rsl)	Australia	Record daily precipitation	13.5 mm (0.5 in)	19 of 100 (Routine)
Yanco (Billinbah East)	Australia	Record daily precipitation	22.6 mm (0.9 in)	19 of 100 (Routine)
Adelaide (Thorndon Park)	Australia	Record daily precipitation	17.5 mm (0.7 in)	18 of 100 (Routine)
Kinchega	Australia	Record daily precipitation	13.7 mm (0.5 in)	18 of 100 (Routine)
Euston Post Office	Australia	Record daily precipitation	29.5 mm (1.2 in)	18 of 100 (Routine)
Cooma Lambie Street	Australia	Record daily precipitation	7.4 mm (0.29 in)	18 of 100 (Routine)
East Toorale (Toorale Station)	Australia	Record daily precipitation	23.6 mm (0.9 in)	17 of 100 (Routine)
Cobar (Paddington)	Australia	Record daily precipitation	22.1 mm (0.9 in)	16 of 100 (Routine)
Queanbeyan Bowling Club	Australia	Record daily precipitation	15.7 mm (0.6 in)	16 of 100 (Routine)
Mulwala Homestead	Australia	Record daily precipitation	13.2 mm (0.5 in)	16 of 100 (Routine)
St John's	Canada	Record high minimum temperature	16.1 C (61.0 F)	16 of 100 (Routine)
Kerkwerve	Netherlands	Record daily precipitation	15.0 mm (0.6 in)	15 of 100 (Routine)
Benerembah	Australia	Record daily precipitation	13.7 mm (0.5 in)	14 of 100 (Routine)
Dimboola	Australia	Record daily precipitation	15.2 mm (0.6 in)	14 of 100 (Routine)
Yarrawonga Post Office	Australia	Record daily precipitation	13.0 mm (0.5 in)	14 of 100 (Routine)
Momba	Australia	Record daily precipitation	15.2 mm (0.6 in)	13 of 100 (Routine)
Warburton	Australia	Record daily precipitation	25.4 mm (1.0 in)	13 of 100 (Routine)
Forbes (Camp Street)	Australia	Record high minimum temperature	12.8 C (55.0 F)	12 of 100 (Routine)
Warrnambool Shire Office	Australia	Record daily precipitation	15.5 mm (0.6 in)	12 of 100 (Routine)
Bourke Post Office	Australia	Record high minimum temperature	14.4 C (57.9 F)	11 of 100 (Routine)
Eurugabah Station	Australia	Record daily precipitation	18.0 mm (0.7 in)	11 of 100 (Routine)
Thelangerin East	Australia	Record daily precipitation	16.0 mm (0.6 in)	11 of 100 (Routine)

Counts by Type and Timescale

69 records

Records set or tied on 20 August 1909 by type: Highest daily maximum 1, Highest daily minimum 4, Heaviest daily rainfall 64.

Records on 20 August 1909 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	0
Highest daily minimum	4
Lowest daily minimum	0
Heaviest daily rainfall	64
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 1909 by timescale: all-time 1, monthly 14, daily 54.

How Much Records Were Beaten By

69 broken records

Margins by which the 69 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 35.1. Ties are not counted.

Top 20 by Significance

20 August 1909

Top 20 records on 20 August 1909 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 1909	Ballan, AU	monthly rain	61.0 mm (2.4 in)	27.5 mm (1.1 in)	30 years	62 of 100 (Major)
20 August 1909	Ararat Post Office, AU	monthly rain	71.4 mm (2.8 in)	32.5 mm (1.3 in)	26 years	61 of 100 (Major)
20 August 1909	Clunes, AU	monthly rain	54.4 mm (2.1 in)	20.4 mm (0.8 in)	26 years	60 of 100 (Major)
20 August 1909	Mount Bute, AU	monthly rain	58.9 mm (2.3 in)	28.9 mm (1.1 in)	23 years	59 of 100 (Notable)
20 August 1909	Maryborough, AU	monthly rain	55.1 mm (2.2 in)	21.8 mm (0.9 in)	19 years	58 of 100 (Notable)
20 August 1909	Daylesford, AU	monthly rain	77.5 mm (3.1 in)	35.1 mm (1.4 in)	0 years	54 of 100 (Notable)
20 August 1909	Castlemaine, AU	monthly rain	74.2 mm (2.9 in)	31.0 mm (1.2 in)	0 years	53 of 100 (Notable)
20 August 1909	Smeaton Weir, AU	monthly rain	56.6 mm (2.2 in)	16.2 mm (0.6 in)	19 years	52 of 100 (Notable)
20 August 1909	Kyneton Post Office, AU	all-time rain	87.6 mm (3.4 in)	15.5 mm (0.6 in)	25 years	52 of 100 (Notable)
20 August 1909	Maldon (Derby Hill), AU	monthly rain	64.0 mm (2.5 in)	22.9 mm (0.9 in)	0 years	52 of 100 (Notable)
20 August 1909	Sunbury (Salesian College ), AU	daily rain	44.5 mm (1.8 in)	27.5 mm (1.1 in)	28 years	51 of 100 (Notable)
20 August 1909	Berrybank, AU	daily rain	39.9 mm (1.6 in)	29.0 mm (1.1 in)	28 years	51 of 100 (Notable)
20 August 1909	Newlyn Reservoir, AU	monthly rain	74.4 mm (2.9 in)	18.8 mm (0.7 in)	26 years	49 of 100 (Notable)
20 August 1909	Warracknabeal Post Office, AU	daily rain	26.7 mm (1.1 in)	19.6 mm (0.8 in)	22 years	47 of 100 (Notable)
20 August 1909	Horsham Polkemmet Rd, AU	daily rain	34.5 mm (1.4 in)	22.3 mm (0.9 in)	13 years	47 of 100 (Notable)
20 August 1909	Hamilton, AU	daily rain	26.9 mm (1.1 in)	15.0 mm (0.6 in)	28 years	44 of 100 (Notable)
20 August 1909	Geelong Sec, AU	daily rain	36.8 mm (1.4 in)	15.2 mm (0.6 in)	22 years	43 of 100 (Notable)
20 August 1909	Scotsburn (Mount Boninyong), AU	daily rain	52.8 mm (2.1 in)	25.6 mm (1.0 in)	18 years	40 of 100 (Notable)
20 August 1909	Kaarimba, AU	daily rain	27.7 mm (1.1 in)	18.3 mm (0.7 in)	22 years	38 of 100 (Notable)
20 August 1909	Hastings Post Office, AU	monthly rain	42.2 mm (1.7 in)	8.2 mm (0.32 in)	22 years	35 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

1797 to 1909

Records set or tied on this calendar date in each year from 1797 to 1909. 1909 had 69 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 1909-08-20: 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 5	22
5 to 10	17
10 to 15	10
15 to 20	7
20 to 25	5
25 to 30	5
30 to 35	2
35 to 40	1