Weather Records on 18 August 1918

53 weather records were set or tied worldwide on 18 August 1918. Highest significance: Asheville, US.

Key Facts for 18 August 1918

On 18 August 1918, 53 weather records were set or tied at long-record stations worldwide.
2 were record highs and 26 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 51 daily.
Asheville set a daily record precipitation of 57.7 mm (2.3 in) on 18 August 1918.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 443 records.

Record Map

53 stations

53 station records on 18 August 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Asheville	United States	Record daily precipitation	57.7 mm (2.3 in)	45 of 100 (Notable)
Moonaree	Australia	Record daily precipitation	30.7 mm (1.2 in)	32 of 100 (Routine)
Moose Factory	Canada	Record low minimum temperature	-1.1 C (30.0 F)	24 of 100 (Routine)
Baltimore Customs House	United States	Record low maximum temperature	20.0 C (68.0 F)	21 of 100 (Routine)
Tolarno	Australia	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Carrieton (Eurelia)	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Menindee Post Office	Australia	Record daily precipitation	10.4 mm (0.4 in)	20 of 100 (Routine)
Greenock	Australia	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Kinchega	Australia	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Belle Isle	Canada	Record low minimum temperature	1.7 C (35.1 F)	20 of 100 (Routine)
Washington	United States	Record low maximum temperature	20.0 C (68.0 F)	20 of 100 (Routine)
San Diego Wbo	United States	Record low minimum temperature	15.0 C (59.0 F)	19 of 100 (Routine)
Quebec	Canada	Record low minimum temperature	5.6 C (42.1 F)	18 of 100 (Routine)
Wallabadah	Australia	Record daily precipitation	16.5 mm (0.6 in)	17 of 100 (Routine)
Stonecliffe	Canada	Record low minimum temperature	2.2 C (36.0 F)	17 of 100 (Routine)
Montreal McGill	Canada	Record low minimum temperature	7.8 C (46.0 F)	17 of 100 (Routine)
Quinyambie	Australia	Record daily precipitation	2.5 mm (0.10 in)	15 of 100 (Routine)
Tilpa (Warloo)	Australia	Record daily precipitation	5.3 mm (0.21 in)	14 of 100 (Routine)
Pooncarie (Moorara)	Australia	Record daily precipitation	11.4 mm (0.4 in)	14 of 100 (Routine)
Portland	United States	Record low minimum temperature	8.9 C (48.0 F)	14 of 100 (Routine)
Netley	Australia	Record daily precipitation	11.4 mm (0.4 in)	13 of 100 (Routine)
Renfrew	Canada	Record low minimum temperature	2.8 C (37.0 F)	13 of 100 (Routine)
Concord	United States	Record low minimum temperature	4.4 C (39.9 F)	13 of 100 (Routine)
Northfield	United States	Record low minimum temperature	1.1 C (34.0 F)	13 of 100 (Routine)
Ellerston	Australia	Record daily precipitation	5.8 mm (0.23 in)	12 of 100 (Routine)
Halifax	Canada	Record low minimum temperature	5.0 C (41.0 F)	12 of 100 (Routine)
Yarmouth	Canada	Record low minimum temperature	4.4 C (39.9 F)	12 of 100 (Routine)
Teryawynia	Australia	Record daily precipitation	6.4 mm (0.25 in)	11 of 100 (Routine)
Yalgogrin South	Australia	Record daily precipitation	6.9 mm (0.27 in)	11 of 100 (Routine)
Olands Norra Udde	Sweden	Record daily precipitation	13.5 mm (0.5 in)	10 of 100 (Routine)
Boolcoomatta	Australia	Record daily precipitation	10.2 mm (0.4 in)	9 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	9.4 C (48.9 F)	9 of 100 (Routine)
Mutooroo	Australia	Record daily precipitation	7.6 mm (0.30 in)	8 of 100 (Routine)
Arumpo	Australia	Record daily precipitation	3.6 mm (0.14 in)	8 of 100 (Routine)
New Westminster	Canada	Record daily precipitation	4.3 mm (0.17 in)	8 of 100 (Routine)
Ottawa	Canada	Record low minimum temperature	7.2 C (45.0 F)	8 of 100 (Routine)
Harrisburg - Coop	United States	Record low maximum temperature	20.0 C (68.0 F)	8 of 100 (Routine)
Cape Otway Lighthouse	Australia	Record high minimum temperature	12.3 C (54.1 F)	7 of 100 (Routine)
Coldwater	Canada	Record low minimum temperature	2.2 C (36.0 F)	7 of 100 (Routine)
Pooncarie (Mulurulu Station)	Australia	Record daily precipitation	11.4 mm (0.4 in)	6 of 100 (Routine)
Swift Current	Canada	Record daily precipitation	4.6 mm (0.18 in)	5 of 100 (Routine)
Haliburton A	Canada	Record low minimum temperature	1.7 C (35.1 F)	4 of 100 (Routine)
Hawker (Warcowie)	Australia	Record daily precipitation	6.9 mm (0.27 in)	3 of 100 (Routine)
Stockport	Australia	Record daily precipitation	6.1 mm (0.24 in)	3 of 100 (Routine)
Tanunda	Australia	Record daily precipitation	8.6 mm (0.34 in)	3 of 100 (Routine)
Chatham	Canada	Record low minimum temperature	5.6 C (42.1 F)	3 of 100 (Routine)
Charlottetown	Canada	Record low minimum temperature	8.3 C (46.9 F)	3 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	8.3 C (46.9 F)	2 of 100 (Routine)
Storrs	United States	Record low minimum temperature	9.4 C (48.9 F)	2 of 100 (Routine)
Houston Wb City	United States	Record high minimum temperature	24.4 C (75.9 F)	2 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	15.6 C (60.1 F)	1 of 100 (Routine)
Cape May 2 NW	United States	Record low maximum temperature	22.2 C (72.0 F)	1 of 100 (Routine)
Setauket Strong	United States	Record low maximum temperature	20.6 C (69.1 F)	0 of 100 (Routine)

Counts by Type and Timescale

53 records

Records set or tied on 18 August 1918 by type: Lowest daily maximum 6, Highest daily minimum 2, Lowest daily minimum 20, Heaviest daily rainfall 25.

Records on 18 August 1918 by type
Record type	Records
Highest daily maximum	0
Lowest daily maximum	6
Highest daily minimum	2
Lowest daily minimum	20
Heaviest daily rainfall	25
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 1918 by timescale: all-time 0, monthly 2, daily 51.

How Much Records Were Beaten By

43 broken records

Margins by which the 43 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 36.9. Ties are not counted.

Top 20 by Significance

18 August 1918

Top 20 records on 18 August 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1918	Asheville, US	daily rain	57.7 mm (2.3 in)	36.9 mm (1.5 in)	30 years	45 of 100 (Notable)
18 August 1918	Moonaree, AU	monthly rain	30.7 mm (1.2 in)	5.8 mm (0.23 in)	14 years	32 of 100 (Routine)
18 August 1918	Moose Factory, CA	monthly low min	-1.1 C (30.0 F)	1.1 C (2.0 F)	27 years	24 of 100 (Routine)
18 August 1918	Baltimore Customs House, US	daily low max	20.0 C (68.0 F)	2.2 C (4.0 F)	38 years	21 of 100 (Routine)
18 August 1918	Tolarno, AU	daily rain	14.5 mm (0.6 in)	13.0 mm (0.5 in)	31 years	20 of 100 (Routine)
18 August 1918	Carrieton (Eurelia), AU	daily rain	24.1 mm (0.9 in)	8.9 mm (0.35 in)	31 years	20 of 100 (Routine)
18 August 1918	Menindee Post Office, AU	daily rain	10.4 mm (0.4 in)	7.6 mm (0.30 in)	31 years	20 of 100 (Routine)
18 August 1918	Greenock, AU	daily rain	16.3 mm (0.6 in)	6.9 mm (0.27 in)	31 years	20 of 100 (Routine)
18 August 1918	Kinchega, AU	daily rain	14.2 mm (0.6 in)	7.3 mm (0.29 in)	16 years	20 of 100 (Routine)
18 August 1918	Belle Isle, CA	daily low min	1.7 C (35.1 F)	2.2 C (4.0 F)	33 years	20 of 100 (Routine)
18 August 1918	Washington, US	daily low max	20.0 C (68.0 F)	1.1 C (2.0 F)	38 years	20 of 100 (Routine)
18 August 1918	San Diego Wbo, US	daily low min	15.0 C (59.0 F)	0.6 C (1.1 F)	36 years	19 of 100 (Routine)
18 August 1918	Quebec, CA	daily low min	5.6 C (42.1 F)	1.6 C (2.9 F)	35 years	18 of 100 (Routine)
18 August 1918	Wallabadah, AU	daily rain	16.5 mm (0.6 in)	4.6 mm (0.18 in)	30 years	17 of 100 (Routine)
18 August 1918	Stonecliffe, CA	daily low min	2.2 C (36.0 F)	2.2 C (4.0 F)	27 years	17 of 100 (Routine)
18 August 1918	Montreal McGill, CA	daily low min	7.8 C (46.0 F)	1.1 C (2.0 F)	35 years	17 of 100 (Routine)
18 August 1918	Quinyambie, AU	daily rain	2.5 mm (0.10 in)	2.5 mm (0.10 in)	30 years	15 of 100 (Routine)
18 August 1918	Tilpa (Warloo), AU	daily rain	5.3 mm (0.21 in)	5.0 mm (0.20 in)	16 years	14 of 100 (Routine)
18 August 1918	Pooncarie (Moorara), AU	daily rain	11.4 mm (0.4 in)	5.8 mm (0.23 in)	12 years	14 of 100 (Routine)
18 August 1918	Portland, US	daily low min	8.9 C (48.0 F)	0.5 C (0.9 F)	31 years	14 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 53 records.

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

Records on 08-18 in each year
Year	Records
1797	2
1805	1
1816	1
1827	1
1829	1
1830	1
1833	1
1841	1
1844	1
1845	3
1846	1
1847	1
1849	1
1851	1
1852	1
1853	1
1854	2
1855	1
1856	1
1861	1
1864	2
1866	1
1868	2
1869	1
1870	2
1872	1
1873	1
1875	3
1876	1
1878	1
1879	2
1883	3
1885	3
1886	3
1887	3
1888	2
1889	1
1890	1
1891	2
1892	6
1893	4
1894	4
1895	1
1898	4
1899	6
1900	2
1901	10
1902	8
1903	6
1904	8
1905	10
1906	40
1907	7
1908	21
1909	24
1910	16
1911	11
1912	21
1913	43
1914	37
1915	60
1916	71
1917	70
1918	53
1919	34
1920	51
1921	39
1922	129
1923	90
1924	225
1925	300
1926	168
1927	269
1928	141
1929	181
1930	150
1931	241
1932	382
1933	431
1934	638
1935	424
1936	766
1937	308
1938	243
1939	381
1940	434
1941	467
1942	333
1943	738
1944	325
1945	400
1946	416
1947	958
1948	315
1949	393
1950	683
1951	355
1952	405
1953	323
1954	622
1955	795
1956	580
1957	380
1958	580
1959	537
1960	599
1961	415
1962	428
1963	760
1964	443
1965	525
1966	573
1967	623
1968	795
1969	530
1970	597
1971	381
1972	493
1973	734
1974	639
1975	844
1976	917
1977	1,112
1978	854
1979	1,309
1980	771
1981	1,386
1982	563
1983	1,420
1984	600
1985	765
1986	861
1987	1,609
1988	1,351
1989	952
1990	920
1991	533
1992	1,497
1993	706
1994	1,027
1995	1,882
1996	760
1997	1,191
1998	923
1999	888
2000	1,183
2001	1,036
2002	1,306
2003	860
2004	1,050
2005	865
2006	842
2007	1,116
2008	1,265
2009	839
2010	1,167
2011	1,239
2012	1,247
2013	752
2014	751
2015	880
2016	704
2017	565
2018	462
2019	615
2020	1,541
2021	1,118
2022	1,237
2023	1,094
2024	696
2025	455
2026	545

Download the Data

Data for records on 1918-08-18: 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	33
5 to 10	8
10 to 15	1
15 to 20	0
20 to 25	0
25 to 30	0
30 to 35	0
35 to 40	1