Weather Records on 17 May 1918

56 weather records were set or tied worldwide on 17 May 1918. Highest significance: Dubuque River, US.

Key Facts for 17 May 1918

On 17 May 1918, 56 weather records were set or tied at long-record stations worldwide.
29 were record highs and 7 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 56 daily.
Dubuque River set a daily record precipitation of 55.1 mm (2.2 in) on 17 May 1918.
Across 167 earlier years (1802 to 2026) the same calendar date averaged 437 records.

Record Map

56 stations

56 station records on 17 May 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 May 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dubuque River	United States	Record daily precipitation	55.1 mm (2.2 in)	41 of 100 (Notable)
Cowes	Australia	Record daily precipitation	39.1 mm (1.5 in)	34 of 100 (Routine)
Mathoura (Mathoura Station)	Australia	Record daily precipitation	40.1 mm (1.6 in)	29 of 100 (Routine)
Madison Wb City	United States	Record daily precipitation	27.2 mm (1.1 in)	21 of 100 (Routine)
Bundarra Post Office	Australia	Record daily precipitation	16.0 mm (0.6 in)	20 of 100 (Routine)
Fort Beaufort	South Africa	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Euabolong (Brotherony)	Australia	Record daily precipitation	21.3 mm (0.8 in)	19 of 100 (Routine)
Moose Factory	Canada	Record high minimum temperature	10.0 C (50.0 F)	18 of 100 (Routine)
Alton	Canada	Record high minimum temperature	15.6 C (60.1 F)	17 of 100 (Routine)
Yantabangee Tank	Australia	Record daily precipitation	16.3 mm (0.6 in)	16 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record low minimum temperature	-5.1 C (22.8 F)	16 of 100 (Routine)
Portland	United States	Record high maximum temperature	23.9 C (75.0 F)	16 of 100 (Routine)
Cape York Post Office	Australia	Record daily precipitation	25.4 mm (1.0 in)	15 of 100 (Routine)
Balranald (Rsl)	Australia	Record daily precipitation	33.8 mm (1.3 in)	15 of 100 (Routine)
Port Arthur	Canada	Record high minimum temperature	10.6 C (51.1 F)	15 of 100 (Routine)
Belle Isle	Canada	Record low minimum temperature	-8.9 C (16.0 F)	15 of 100 (Routine)
Vestervig	Denmark	Record high maximum temperature	24.2 C (75.6 F)	14 of 100 (Routine)
Bingara Post Office	Australia	Record daily precipitation	16.5 mm (0.6 in)	13 of 100 (Routine)
Foster (Post Office)	Australia	Record daily precipitation	35.1 mm (1.4 in)	13 of 100 (Routine)
Parry Sound	Canada	Record high maximum temperature	27.8 C (82.0 F)	13 of 100 (Routine)
Lakefield	Canada	Record high maximum temperature	28.9 C (84.0 F)	13 of 100 (Routine)
Hambantota	Sri Lanka	Record low maximum temperature	25.9 C (78.6 F)	13 of 100 (Routine)
Camboon Station	Australia	Record daily precipitation	7.6 mm (0.30 in)	12 of 100 (Routine)
Warragul (Carbethon)	Australia	Record daily precipitation	32.8 mm (1.3 in)	12 of 100 (Routine)
Visby_Flygplats	Sweden	Record high minimum temperature	10.1 C (50.2 F)	12 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record high minimum temperature	7.2 C (45.0 F)	12 of 100 (Routine)
Toongabbie	Australia	Record daily precipitation	9.4 mm (0.37 in)	11 of 100 (Routine)
Prince Albert	Canada	Record low minimum temperature	-4.4 C (24.1 F)	11 of 100 (Routine)
Moose Factory	Canada	Record high maximum temperature	28.9 C (84.0 F)	11 of 100 (Routine)
Bjuraker	Sweden	Record high maximum temperature	25.0 C (77.0 F)	11 of 100 (Routine)
Waverley (Belltrees 2)	Australia	Record daily precipitation	9.1 mm (0.36 in)	10 of 100 (Routine)
West Wyalong (Tallimbalong)	Australia	Record daily precipitation	20.8 mm (0.8 in)	10 of 100 (Routine)
Kardella (Fleetwood)	Australia	Record daily precipitation	48.3 mm (1.9 in)	10 of 100 (Routine)
Medicine Hat A	Canada	Record low minimum temperature	-2.2 C (28.0 F)	10 of 100 (Routine)
Orebro	Sweden	Record high minimum temperature	9.5 C (49.1 F)	10 of 100 (Routine)
Concord	United States	Record high maximum temperature	30.0 C (86.0 F)	10 of 100 (Routine)
Prince Albert	Canada	Record low maximum temperature	7.2 C (45.0 F)	9 of 100 (Routine)
Kirchdorf/Poel	Germany	Record high maximum temperature	27.3 C (81.1 F)	9 of 100 (Routine)
Gavle	Sweden	Record high minimum temperature	11.0 C (51.8 F)	9 of 100 (Routine)
Altastenberg	Germany	Record high maximum temperature	26.0 C (78.8 F)	8 of 100 (Routine)
Stockholm	Sweden	Record high maximum temperature	23.0 C (73.4 F)	8 of 100 (Routine)
Bjuraker	Sweden	Record high minimum temperature	8.0 C (46.4 F)	7 of 100 (Routine)
Green Bay	United States	Record daily precipitation	14.0 mm (0.6 in)	7 of 100 (Routine)
Vastervik	Sweden	Record high maximum temperature	21.5 C (70.7 F)	6 of 100 (Routine)
Gravenhurst	Canada	Record high maximum temperature	28.9 C (84.0 F)	3 of 100 (Routine)
Parry Sound	Canada	Record high minimum temperature	12.8 C (55.0 F)	3 of 100 (Routine)
Buffalo	United States	Record high maximum temperature	27.2 C (81.0 F)	3 of 100 (Routine)
Blyth	Australia	Record daily precipitation	14.0 mm (0.6 in)	2 of 100 (Routine)
Brantford	Canada	Record high maximum temperature	29.4 C (84.9 F)	2 of 100 (Routine)
Jonkoping	Sweden	Record high minimum temperature	7.5 C (45.5 F)	2 of 100 (Routine)
Stornoway Airport	United Kingdom	Record high minimum temperature	9.4 C (48.9 F)	2 of 100 (Routine)
Qu'appelle	Canada	Record low minimum temperature	-2.2 C (28.0 F)	1 of 100 (Routine)
London South	Canada	Record high maximum temperature	28.9 C (84.0 F)	1 of 100 (Routine)
Haliburton A	Canada	Record high maximum temperature	28.9 C (84.0 F)	1 of 100 (Routine)
Lindsay	Canada	Record high maximum temperature	29.4 C (84.9 F)	1 of 100 (Routine)
Gavle	Sweden	Record high maximum temperature	24.5 C (76.1 F)	1 of 100 (Routine)

Counts by Type and Timescale

56 records

Records set or tied on 17 May 1918 by type: Highest daily maximum 18, Lowest daily maximum 2, Highest daily minimum 11, Lowest daily minimum 5, Heaviest daily rainfall 20.

Records on 17 May 1918 by type
Record type	Records
Highest daily maximum	18
Lowest daily maximum	2
Highest daily minimum	11
Lowest daily minimum	5
Heaviest daily rainfall	20
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 May 1918 by timescale: all-time 0, monthly 0, daily 56.

How Much Records Were Beaten By

44 broken records

Margins by which the 44 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 31.0. Ties are not counted.

Top 20 by Significance

17 May 1918

Top 20 records on 17 May 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 May 1918	Dubuque River, US	daily rain	55.1 mm (2.2 in)	31.0 mm (1.2 in)	28 years	41 of 100 (Notable)
17 May 1918	Cowes, AU	daily rain	39.1 mm (1.5 in)	13.7 mm (0.5 in)	27 years	34 of 100 (Routine)
17 May 1918	Mathoura (Mathoura Station), AU	daily rain	40.1 mm (1.6 in)	15.7 mm (0.6 in)	25 years	29 of 100 (Routine)
17 May 1918	Madison Wb City, US	daily rain	27.2 mm (1.1 in)	9.2 mm (0.36 in)	23 years	21 of 100 (Routine)
17 May 1918	Bundarra Post Office, AU	daily rain	16.0 mm (0.6 in)	9.6 mm (0.38 in)	34 years	20 of 100 (Routine)
17 May 1918	Fort Beaufort, ZA	daily rain	11.9 mm (0.5 in)	4.8 mm (0.19 in)	37 years	20 of 100 (Routine)
17 May 1918	Euabolong (Brotherony), AU	daily rain	21.3 mm (0.8 in)	6.1 mm (0.24 in)	27 years	19 of 100 (Routine)
17 May 1918	Moose Factory, CA	daily high min	10.0 C (50.0 F)	5.6 C (10.1 F)	12 years	18 of 100 (Routine)
17 May 1918	Alton, CA	daily high min	15.6 C (60.1 F)	3.9 C (7.0 F)	21 years	17 of 100 (Routine)
17 May 1918	Yantabangee Tank, AU	daily rain	16.3 mm (0.6 in)	9.9 mm (0.39 in)	27 years	16 of 100 (Routine)
17 May 1918	Nikolaevsk-Na-Amure, RU	daily low min	-5.1 C (22.8 F)	1.1 C (2.0 F)	33 years	16 of 100 (Routine)
17 May 1918	Portland, US	daily high max	23.9 C (75.0 F)	0.6 C (1.1 F)	38 years	16 of 100 (Routine)
17 May 1918	Cape York Post Office, AU	daily rain	25.4 mm (1.0 in)	13.5 mm (0.5 in)	8 years	15 of 100 (Routine)
17 May 1918	Balranald (Rsl), AU	daily rain	33.8 mm (1.3 in)	6.4 mm (0.25 in)	17 years	15 of 100 (Routine)
17 May 1918	Port Arthur, CA	daily high min	10.6 C (51.1 F)	2.8 C (5.0 F)	15 years	15 of 100 (Routine)
17 May 1918	Belle Isle, CA	daily low min	-8.9 C (16.0 F)	0.6 C (1.1 F)	33 years	15 of 100 (Routine)
17 May 1918	Vestervig, DK	daily high max	24.2 C (75.6 F)	2.1 C (3.8 F)	20 years	14 of 100 (Routine)
17 May 1918	Bingara Post Office, AU	daily rain	16.5 mm (0.6 in)	1.3 mm (0.05 in)	27 years	13 of 100 (Routine)
17 May 1918	Foster (Post Office), AU	daily rain	35.1 mm (1.4 in)	4.4 mm (0.17 in)	18 years	13 of 100 (Routine)
17 May 1918	Parry Sound, CA	daily high max	27.8 C (82.0 F)	1.1 C (2.0 F)	28 years	13 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

1802 to 1918

Records set or tied on this calendar date in each year from 1802 to 1918. 1918 had 56 records.

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

Records on 05-17 in each year
Year	Records
1802	2
1803	1
1808	1
1816	1
1834	1
1837	1
1839	1
1847	2
1848	1
1851	1
1853	1
1855	1
1858	1
1859	1
1861	2
1862	2
1863	2
1864	1
1871	2
1872	2
1873	2
1874	4
1877	1
1878	1
1879	2
1880	1
1881	1
1882	2
1883	3
1885	1
1887	1
1888	2
1889	3
1891	8
1892	4
1893	3
1895	8
1896	2
1897	3
1898	6
1899	7
1900	12
1901	2
1902	3
1903	9
1904	12
1905	10
1906	22
1907	10
1908	5
1909	33
1910	16
1911	30
1912	16
1913	24
1914	24
1915	53
1916	49
1917	18
1918	56
1919	35
1920	46
1921	50
1922	30
1923	95
1924	80
1925	326
1926	133
1927	264
1928	127
1929	168
1930	421
1931	201
1932	288
1933	365
1934	373
1935	341
1936	270
1937	183
1938	340
1939	285
1940	338
1941	408
1942	589
1943	855
1944	521
1945	799
1946	586
1947	249
1948	412
1949	544
1950	371
1951	373
1952	777
1953	441
1954	298
1955	570
1956	1,166
1957	469
1958	331
1959	488
1960	402
1961	291
1962	1,325
1963	368
1964	417
1965	462
1966	489
1967	644
1968	564
1969	638
1970	711
1971	723
1972	610
1973	1,016
1974	1,302
1975	365
1976	426
1977	1,078
1978	872
1979	459
1980	768
1981	940
1982	476
1983	1,326
1984	925
1985	561
1986	921
1987	1,054
1988	1,096
1989	1,307
1990	1,135
1991	1,237
1992	1,025
1993	495
1994	858
1995	1,734
1996	1,706
1997	1,619
1998	1,080
1999	795
2000	825
2001	960
2002	964
2003	1,127
2004	769
2005	784
2006	1,522
2007	742
2008	1,309
2009	1,050
2010	880
2011	1,483
2012	711
2013	739
2014	1,062
2015	824
2016	741
2017	1,302
2018	726
2019	686
2020	496
2021	443
2022	479
2023	385
2024	566
2025	928
2026	745

Download the Data

Data for records on 1918-05-17: 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	34
5 to 10	6
10 to 15	2
15 to 20	1
20 to 25	0
25 to 30	0
30 to 35	1