Weather Records on 18 July 1917

265 weather records were set or tied worldwide on 18 July 1917. Highest significance: Helmond, NL.

Key Facts for 18 July 1917

On 18 July 1917, 265 weather records were set or tied at long-record stations worldwide.
7 were record highs and 3 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 254 daily.
Helmond set an all-time record daily precipitation of 70.0 mm (2.8 in) on 18 July 1917.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 463 records.

Record Map

265 stations

265 station records on 18 July 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 July 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Helmond	Netherlands	Record daily precipitation	70.0 mm (2.8 in)	65 of 100 (Major)
Bogo Bogolog	Australia	Record daily precipitation	34.8 mm (1.4 in)	41 of 100 (Notable)
Brinkworth (Bungaree)	Australia	Record daily precipitation	32.0 mm (1.3 in)	38 of 100 (Notable)
Yacka	Australia	Record daily precipitation	30.5 mm (1.2 in)	38 of 100 (Notable)
Peterborough (Dawson)	Australia	Record daily precipitation	33.0 mm (1.3 in)	37 of 100 (Notable)
Holbrook (Rsl)	Australia	Record daily precipitation	67.3 mm (2.6 in)	35 of 100 (Notable)
Tumut (Red Hill Station)	Australia	Record daily precipitation	40.1 mm (1.6 in)	35 of 100 (Notable)
Koolunga	Australia	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Brinkworth (Anama Park)	Australia	Record daily precipitation	27.2 mm (1.1 in)	33 of 100 (Routine)
Clare (Hill River)	Australia	Record daily precipitation	33.0 mm (1.3 in)	32 of 100 (Routine)
Talmalmo	Australia	Record daily precipitation	39.1 mm (1.5 in)	31 of 100 (Routine)
Hawker	Australia	Record daily precipitation	47.0 mm (1.9 in)	30 of 100 (Routine)
Mount Remarkable	Australia	Record daily precipitation	35.6 mm (1.4 in)	29 of 100 (Routine)
Bolagamy	Australia	Record daily precipitation	25.1 mm (1.0 in)	29 of 100 (Routine)
Grenfell (Quondong Rd)	Australia	Record daily precipitation	26.7 mm (1.1 in)	27 of 100 (Routine)
Wrixum/Fohr	Germany	Record daily precipitation	26.5 mm (1.0 in)	27 of 100 (Routine)
Barrie	Canada	Record daily precipitation	27.9 mm (1.1 in)	25 of 100 (Routine)
Watervale	Australia	Record daily precipitation	30.5 mm (1.2 in)	24 of 100 (Routine)
Mundarlo (Yabtree)	Australia	Record daily precipitation	27.9 mm (1.1 in)	24 of 100 (Routine)
Blinman	Australia	Record daily precipitation	29.0 mm (1.1 in)	23 of 100 (Routine)
Farrell Flat	Australia	Record daily precipitation	31.8 mm (1.3 in)	23 of 100 (Routine)
Kyamba	Australia	Record daily precipitation	35.3 mm (1.4 in)	23 of 100 (Routine)
Fairlight Station	Australia	Record daily precipitation	29.0 mm (1.1 in)	21 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Hillston Airport	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Poolamacca	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Culpotaro	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Nekarboo	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Bendigo Prison	Australia	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Marfield	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Hatfield (Clare)	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Roto (Coombie)	Australia	Record daily precipitation	20.1 mm (0.8 in)	20 of 100 (Routine)
Auburn	Australia	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Manfred	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Ivanhoe Post Office	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Kilmore Assumption College	Australia	Record daily precipitation	22.6 mm (0.9 in)	20 of 100 (Routine)
Conoble	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Narraport	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Whroo	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Daylesford	Australia	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Cobar (Paddington)	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Heathcote	Australia	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Vestervig	Denmark	Record daily precipitation	18.7 mm (0.7 in)	20 of 100 (Routine)
Coan Downs	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Dumosa	Australia	Record daily precipitation	10.4 mm (0.4 in)	20 of 100 (Routine)
Broken Hill (Nuntherungie)	Australia	Record daily precipitation	8.1 mm (0.32 in)	20 of 100 (Routine)
Pooncarie (Tarcoola)	Australia	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Brundah	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Litchfield	Australia	Record daily precipitation	12.4 mm (0.5 in)	20 of 100 (Routine)
Wycheproof (Post Office)	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Ararat Post Office	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Cultowa	Australia	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Roto Station	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Merungle	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Gredgwin (Barraport North)	Australia	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Warracknabeal Post Office	Australia	Record daily precipitation	10.4 mm (0.4 in)	20 of 100 (Routine)
Dunolly	Australia	Record daily precipitation	16.0 mm (0.6 in)	20 of 100 (Routine)
Geelong Sec	Australia	Record daily precipitation	7.4 mm (0.29 in)	20 of 100 (Routine)
Clunes	Australia	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Kyneton Post Office	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

265 records

Records set or tied on 18 July 1917 by type: Highest daily maximum 4, Lowest daily maximum 2, Highest daily minimum 3, Lowest daily minimum 1, Heaviest daily rainfall 255.

Records on 18 July 1917 by type
Record type	Records
Highest daily maximum	4
Lowest daily maximum	2
Highest daily minimum	3
Lowest daily minimum	1
Heaviest daily rainfall	255
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 July 1917 by timescale: all-time 1, monthly 10, daily 254.

How Much Records Were Beaten By

250 broken records

Margins by which the 250 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 25.6. Ties are not counted.

Top 20 by Significance

18 July 1917

Top 20 records on 18 July 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 July 1917	Helmond, NL	all-time rain	70.0 mm (2.8 in)	21.0 mm (0.8 in)	12 years	65 of 100 (Major)
18 July 1917	Bogo Bogolog, AU	daily rain	34.8 mm (1.4 in)	22.1 mm (0.9 in)	8 years	41 of 100 (Notable)
18 July 1917	Brinkworth (Bungaree), AU	daily rain	32.0 mm (1.3 in)	15.7 mm (0.6 in)	22 years	38 of 100 (Notable)
18 July 1917	Yacka, AU	daily rain	30.5 mm (1.2 in)	16.0 mm (0.6 in)	0 years	38 of 100 (Notable)
18 July 1917	Peterborough (Dawson), AU	monthly rain	33.0 mm (1.3 in)	7.6 mm (0.30 in)	26 years	37 of 100 (Notable)
18 July 1917	Holbrook (Rsl), AU	monthly rain	67.3 mm (2.6 in)	12.9 mm (0.5 in)	17 years	35 of 100 (Notable)
18 July 1917	Tumut (Red Hill Station), AU	daily rain	40.1 mm (1.6 in)	25.6 mm (1.0 in)	8 years	35 of 100 (Notable)
18 July 1917	Koolunga, AU	monthly rain	33.0 mm (1.3 in)	8.1 mm (0.32 in)	9 years	34 of 100 (Routine)
18 July 1917	Brinkworth (Anama Park), AU	daily rain	27.2 mm (1.1 in)	11.2 mm (0.4 in)	22 years	33 of 100 (Routine)
18 July 1917	Clare (Hill River), AU	daily rain	33.0 mm (1.3 in)	19.0 mm (0.7 in)	6 years	32 of 100 (Routine)
18 July 1917	Talmalmo, AU	daily rain	39.1 mm (1.5 in)	19.8 mm (0.8 in)	8 years	31 of 100 (Routine)
18 July 1917	Hawker, AU	monthly rain	47.0 mm (1.9 in)	10.9 mm (0.4 in)	0 years	30 of 100 (Routine)
18 July 1917	Mount Remarkable, AU	monthly rain	35.6 mm (1.4 in)	3.6 mm (0.14 in)	26 years	29 of 100 (Routine)
18 July 1917	Bolagamy, AU	daily rain	25.1 mm (1.0 in)	14.9 mm (0.6 in)	7 years	29 of 100 (Routine)
18 July 1917	Grenfell (Quondong Rd), AU	daily rain	26.7 mm (1.1 in)	13.2 mm (0.5 in)	8 years	27 of 100 (Routine)
18 July 1917	Wrixum/Fohr, DE	daily rain	26.5 mm (1.0 in)	11.2 mm (0.4 in)	23 years	27 of 100 (Routine)
18 July 1917	Barrie, CA	daily rain	27.9 mm (1.1 in)	16.7 mm (0.7 in)	18 years	25 of 100 (Routine)
18 July 1917	Watervale, AU	daily rain	30.5 mm (1.2 in)	14.0 mm (0.6 in)	0 years	24 of 100 (Routine)
18 July 1917	Mundarlo (Yabtree), AU	daily rain	27.9 mm (1.1 in)	10.9 mm (0.4 in)	8 years	24 of 100 (Routine)
18 July 1917	Blinman, AU	monthly rain	29.0 mm (1.1 in)	4.1 mm (0.16 in)	0 years	23 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

1793 to 1917

Records set or tied on this calendar date in each year from 1793 to 1917. 1917 had 265 records.

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

Records on 07-18 in each year
Year	Records
1793	2
1801	1
1845	1
1847	1
1851	1
1858	1
1862	1
1863	2
1865	1
1866	2
1871	2
1872	1
1874	1
1877	1
1878	4
1880	1
1881	2
1883	2
1886	2
1887	2
1888	1
1889	2
1890	4
1891	1
1892	2
1895	1
1896	2
1897	6
1898	2
1899	3
1900	8
1901	5
1902	3
1903	14
1904	7
1905	22
1906	13
1907	12
1908	39
1909	11
1910	33
1911	42
1912	28
1913	21
1914	47
1915	95
1916	235
1917	265
1918	58
1919	38
1920	59
1921	67
1922	138
1923	126
1924	306
1925	217
1926	191
1927	85
1928	108
1929	123
1930	462
1931	382
1932	343
1933	228
1934	502
1935	212
1936	665
1937	334
1938	306
1939	424
1940	352
1941	349
1942	661
1943	277
1944	333
1945	350
1946	334
1947	385
1948	289
1949	521
1950	632
1951	307
1952	597
1953	493
1954	501
1955	423
1956	466
1957	325
1958	475
1959	548
1960	669
1961	280
1962	516
1963	269
1964	523
1965	707
1966	545
1967	735
1968	998
1969	590
1970	530
1971	625
1972	701
1973	976
1974	729
1975	643
1976	1,047
1977	839
1978	881
1979	821
1980	747
1981	624
1982	749
1983	1,071
1984	1,000
1985	582
1986	908
1987	1,845
1988	1,001
1989	1,233
1990	1,053
1991	589
1992	1,135
1993	1,013
1994	720
1995	904
1996	1,157
1997	785
1998	1,169
1999	900
2000	1,214
2001	909
2002	840
2003	1,159
2004	985
2005	1,210
2006	1,285
2007	1,267
2008	593
2009	1,757
2010	878
2011	1,148
2012	1,070
2013	921
2014	1,348
2015	745
2016	609
2017	426
2018	699
2019	548
2020	361
2021	676
2022	1,071
2023	867
2024	581
2025	779
2026	806

Download the Data

Data for records on 1917-07-18: 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).

Histogram of margins by which records were beaten on 18 July 1917
Margin	Records
0 to 5	159
5 to 10	60
10 to 15	16
15 to 20	12
20 to 25	2
25 to 30	1