Weather Records on 20 August 1918

69 weather records were set or tied worldwide on 20 August 1918. Highest significance: Yardea, AU.

Key Facts for 20 August 1918

On 20 August 1918, 69 weather records were set or tied at long-record stations worldwide.
8 were record highs and 7 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 68 daily.
Yardea set a daily record precipitation of 35.6 mm (1.4 in) on 20 August 1918.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 457 records.

Record Map

69 stations

69 station records on 20 August 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Yardea	Australia	Record daily precipitation	35.6 mm (1.4 in)	52 of 100 (Notable)
Port Augusta West	Australia	Record daily precipitation	26.7 mm (1.1 in)	49 of 100 (Notable)
Bramfield Post Office	Australia	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Yudnapinna	Australia	Record daily precipitation	30.5 mm (1.2 in)	47 of 100 (Notable)
Port Augusta Post Office	Australia	Record daily precipitation	26.7 mm (1.1 in)	46 of 100 (Notable)
Mount Remarkable	Australia	Record daily precipitation	25.9 mm (1.0 in)	32 of 100 (Routine)
Armagh	United Kingdom	Record high minimum temperature	16.4 C (61.5 F)	27 of 100 (Routine)
Ft Bidwell	United States	Record low maximum temperature	17.8 C (64.0 F)	21 of 100 (Routine)
Corny Point Lighthouse	Australia	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Whittata	Australia	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Quorn (Round Hill)	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Corny Point	Australia	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Sheringa (Lake Hamilton)	Australia	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Tumby Bay (Warratta Vale)	Australia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Calivil	Australia	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Morgan Post Office	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Streaky Bay	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Orroroo (Black Rock)	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Curnomona (Curnamona)	Australia	Record daily precipitation	5.3 mm (0.21 in)	20 of 100 (Routine)
Coulta	Australia	Record daily precipitation	28.2 mm (1.1 in)	20 of 100 (Routine)
Woomera (Oakden Hills)	Australia	Record daily precipitation	20.3 mm (0.8 in)	19 of 100 (Routine)
Mannum Council Depot	Australia	Record daily precipitation	10.9 mm (0.4 in)	19 of 100 (Routine)
Quorn (Depot Flat)	Australia	Record daily precipitation	26.7 mm (1.1 in)	17 of 100 (Routine)
Stuarts Creek	Australia	Record daily precipitation	6.4 mm (0.25 in)	16 of 100 (Routine)
Melrose	Australia	Record daily precipitation	35.8 mm (1.4 in)	16 of 100 (Routine)
Port Germein	Australia	Record daily precipitation	20.3 mm (0.8 in)	16 of 100 (Routine)
Wilmington	Australia	Record daily precipitation	29.2 mm (1.1 in)	16 of 100 (Routine)
The Olives	Australia	Record daily precipitation	22.6 mm (0.9 in)	16 of 100 (Routine)
Elliston	Australia	Record daily precipitation	13.7 mm (0.5 in)	15 of 100 (Routine)
Hawker (Holowilena)	Australia	Record daily precipitation	19.8 mm (0.8 in)	15 of 100 (Routine)
Stansbury	Australia	Record daily precipitation	18.0 mm (0.7 in)	15 of 100 (Routine)
Wallaroo	Australia	Record daily precipitation	14.7 mm (0.6 in)	15 of 100 (Routine)
Mount Macedon	Australia	Record daily precipitation	27.4 mm (1.1 in)	15 of 100 (Routine)
Maly Uzen'	Russia	Record daily precipitation	12.1 mm (0.5 in)	15 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	6.7 C (44.1 F)	15 of 100 (Routine)
Quorn (Olive Grove)	Australia	Record daily precipitation	28.4 mm (1.1 in)	14 of 100 (Routine)
Peterborough (Dawson)	Australia	Record daily precipitation	16.0 mm (0.6 in)	14 of 100 (Routine)
Kadina	Australia	Record daily precipitation	20.3 mm (0.8 in)	14 of 100 (Routine)
Yarrabee Park	Australia	Record daily precipitation	15.5 mm (0.6 in)	14 of 100 (Routine)
Casterton (Warrock)	Australia	Record daily precipitation	14.0 mm (0.6 in)	14 of 100 (Routine)
Mahackala	Russia	Record high minimum temperature	23.1 C (73.6 F)	14 of 100 (Routine)
Cape May 2 NW	United States	Record low minimum temperature	12.2 C (54.0 F)	14 of 100 (Routine)
Winnemucca AP	United States	Record low maximum temperature	21.1 C (70.0 F)	13 of 100 (Routine)
Jacksonville Wb City	United States	Record low maximum temperature	26.7 C (80.1 F)	13 of 100 (Routine)
Peterborough	Australia	Record daily precipitation	13.2 mm (0.5 in)	12 of 100 (Routine)
Port Pirie Nyrstar Comparison	Australia	Record daily precipitation	15.2 mm (0.6 in)	12 of 100 (Routine)
Saint John	Canada	Record high maximum temperature	26.1 C (79.0 F)	12 of 100 (Routine)
Cet Central England	United Kingdom	Record high minimum temperature	15.3 C (59.5 F)	12 of 100 (Routine)
Murray Town (Doughboy Creek)	Australia	Record daily precipitation	22.9 mm (0.9 in)	11 of 100 (Routine)
Hallett	Australia	Record daily precipitation	15.2 mm (0.6 in)	11 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record high minimum temperature	16.7 C (62.1 F)	11 of 100 (Routine)
Winnemucca AP	United States	Record low minimum temperature	1.1 C (34.0 F)	11 of 100 (Routine)
Eudunda	Australia	Record daily precipitation	17.8 mm (0.7 in)	10 of 100 (Routine)
Novorossijsk	Russia	Record daily precipitation	9.9 mm (0.39 in)	10 of 100 (Routine)
Sevastopol',Mgs	Ukraine	Record daily precipitation	16.0 mm (0.6 in)	10 of 100 (Routine)
Mannanarie Post Office	Australia	Record daily precipitation	17.8 mm (0.7 in)	9 of 100 (Routine)
Port Germein (Telowie)	Australia	Record daily precipitation	21.6 mm (0.9 in)	9 of 100 (Routine)
Kingscote	Australia	Record daily precipitation	10.9 mm (0.4 in)	9 of 100 (Routine)
Collingrove	Australia	Record daily precipitation	15.5 mm (0.6 in)	9 of 100 (Routine)
St Albans	Canada	Record high minimum temperature	16.7 C (62.1 F)	9 of 100 (Routine)

Counts by Type and Timescale

69 records

Records set or tied on 20 August 1918 by type: Highest daily maximum 2, Lowest daily maximum 3, Highest daily minimum 6, Lowest daily minimum 4, Heaviest daily rainfall 54.

Records on 20 August 1918 by type
Record type	Records
Highest daily maximum	2
Lowest daily maximum	3
Highest daily minimum	6
Lowest daily minimum	4
Heaviest daily rainfall	54
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 1918 by timescale: all-time 0, monthly 1, daily 68.

How Much Records Were Beaten By

65 broken records

Margins by which the 65 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 27.5. Ties are not counted.

Top 20 by Significance

20 August 1918

Top 20 records on 20 August 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 1918	Yardea, AU	daily rain	35.6 mm (1.4 in)	27.5 mm (1.1 in)	28 years	52 of 100 (Notable)
20 August 1918	Port Augusta West, AU	daily rain	26.7 mm (1.1 in)	17.6 mm (0.7 in)	31 years	49 of 100 (Notable)
20 August 1918	Bramfield Post Office, AU	daily rain	33.0 mm (1.3 in)	23.1 mm (0.9 in)	25 years	48 of 100 (Notable)
20 August 1918	Yudnapinna, AU	daily rain	30.5 mm (1.2 in)	20.3 mm (0.8 in)	16 years	47 of 100 (Notable)
20 August 1918	Port Augusta Post Office, AU	daily rain	26.7 mm (1.1 in)	15.8 mm (0.6 in)	31 years	46 of 100 (Notable)
20 August 1918	Mount Remarkable, AU	daily rain	25.9 mm (1.0 in)	12.4 mm (0.5 in)	31 years	32 of 100 (Routine)
20 August 1918	Armagh, GB	daily high min	16.4 C (61.5 F)	0.6 C (1.1 F)	60 years	27 of 100 (Routine)
20 August 1918	Ft Bidwell, US	daily low max	17.8 C (64.0 F)	1.6 C (2.9 F)	45 years	21 of 100 (Routine)
20 August 1918	Corny Point Lighthouse, AU	daily rain	17.3 mm (0.7 in)	8.4 mm (0.33 in)	32 years	20 of 100 (Routine)
20 August 1918	Whittata, AU	daily rain	19.6 mm (0.8 in)	10.2 mm (0.4 in)	31 years	20 of 100 (Routine)
20 August 1918	Quorn (Round Hill), AU	daily rain	21.8 mm (0.9 in)	10.9 mm (0.4 in)	31 years	20 of 100 (Routine)
20 August 1918	Corny Point, AU	daily rain	18.5 mm (0.7 in)	10.9 mm (0.4 in)	4 years	20 of 100 (Routine)
20 August 1918	Sheringa (Lake Hamilton), AU	daily rain	18.5 mm (0.7 in)	6.3 mm (0.25 in)	25 years	20 of 100 (Routine)
20 August 1918	Tumby Bay (Warratta Vale), AU	daily rain	17.0 mm (0.7 in)	7.3 mm (0.29 in)	21 years	20 of 100 (Routine)
20 August 1918	Calivil, AU	daily rain	21.1 mm (0.8 in)	10.7 mm (0.4 in)	8 years	20 of 100 (Routine)
20 August 1918	Morgan Post Office, AU	daily rain	15.0 mm (0.6 in)	6.6 mm (0.26 in)	22 years	20 of 100 (Routine)
20 August 1918	Streaky Bay, AU	daily rain	15.0 mm (0.6 in)	4.3 mm (0.17 in)	31 years	20 of 100 (Routine)
20 August 1918	Orroroo (Black Rock), AU	daily rain	20.3 mm (0.8 in)	5.1 mm (0.20 in)	31 years	20 of 100 (Routine)
20 August 1918	Curnomona (Curnamona), AU	daily rain	5.3 mm (0.21 in)	5.3 mm (0.21 in)	36 years	20 of 100 (Routine)
20 August 1918	Coulta, AU	monthly rain	28.2 mm (1.1 in)	3.3 mm (0.13 in)	1 year	20 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

1797 to 1918

Records set or tied on this calendar date in each year from 1797 to 1918. 1918 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 1918-08-20: 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	36
5 to 10	18
10 to 15	6
15 to 20	2
20 to 25	2
25 to 30	1