Weather Records on 18 September 1917

99 weather records were set or tied worldwide on 18 September 1917. Highest significance: Englesberg Village, AU.

Key Facts for 18 September 1917

On 18 September 1917, 99 weather records were set or tied at long-record stations worldwide.
14 were record highs and 11 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 94 daily.
Englesberg Village set a daily record precipitation of 44.5 mm (1.8 in) on 18 September 1917.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 423 records.

Record Map

99 stations

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

Weather records on 18 September 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Englesberg Village	Australia	Record daily precipitation	44.5 mm (1.8 in)	50 of 100 (Notable)
Kilkivan Post Office	Australia	Record daily precipitation	43.4 mm (1.7 in)	45 of 100 (Notable)
Stanthorpe Leslie Parade	Australia	Record daily precipitation	52.8 mm (2.1 in)	45 of 100 (Notable)
Wrixum/Fohr	Germany	Record daily precipitation	31.1 mm (1.2 in)	42 of 100 (Notable)
Emerald Post Office	Australia	Record daily precipitation	32.5 mm (1.3 in)	41 of 100 (Notable)
Esk Post Office	Australia	Record daily precipitation	50.8 mm (2.0 in)	41 of 100 (Notable)
Hawkwood Station	Australia	Record daily precipitation	43.2 mm (1.7 in)	40 of 100 (Notable)
Southport Ridgeway Ave	Australia	Record daily precipitation	44.7 mm (1.8 in)	39 of 100 (Notable)
Warwick Post Office	Australia	Record daily precipitation	39.1 mm (1.5 in)	39 of 100 (Notable)
Allora Post Office	Australia	Record daily precipitation	42.4 mm (1.7 in)	37 of 100 (Notable)
Clermont Sirius St	Australia	Record daily precipitation	44.5 mm (1.8 in)	36 of 100 (Notable)
Nanango Wills St	Australia	Record daily precipitation	41.4 mm (1.6 in)	35 of 100 (Notable)
Leyburn Post Office	Australia	Record daily precipitation	50.0 mm (2.0 in)	35 of 100 (Notable)
Grafton City Council	Australia	Record daily precipitation	34.3 mm (1.4 in)	35 of 100 (Notable)
Lismore (Centre Street)	Australia	Record daily precipitation	40.1 mm (1.6 in)	35 of 100 (Notable)
Nerang Gilston Rd	Australia	Record daily precipitation	39.1 mm (1.5 in)	33 of 100 (Routine)
Cambooya Post Office	Australia	Record daily precipitation	36.1 mm (1.4 in)	33 of 100 (Routine)
Dalby Post Office	Australia	Record daily precipitation	37.1 mm (1.5 in)	33 of 100 (Routine)
Darwin Post Office	Australia	Record daily precipitation	28.2 mm (1.1 in)	31 of 100 (Routine)
Emu Park Hill St	Australia	Record daily precipitation	41.1 mm (1.6 in)	30 of 100 (Routine)
Pittsworth	Australia	Record daily precipitation	35.8 mm (1.4 in)	30 of 100 (Routine)
Bustard Head Lighthouse	Australia	Record daily precipitation	61.0 mm (2.4 in)	29 of 100 (Routine)
St Helena Island	Australia	Record daily precipitation	31.8 mm (1.3 in)	29 of 100 (Routine)
Brinkworth (Bungaree)	Australia	Record daily precipitation	32.3 mm (1.3 in)	28 of 100 (Routine)
Gunnedah Pool	Australia	Record low maximum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Marlborough Post Office	Australia	Record daily precipitation	29.2 mm (1.1 in)	27 of 100 (Routine)
Caboolture Post Office	Australia	Record daily precipitation	30.5 mm (1.2 in)	27 of 100 (Routine)
Goondiwindi Post Office	Australia	Record daily precipitation	31.2 mm (1.2 in)	27 of 100 (Routine)
Camboon Station	Australia	Record daily precipitation	43.4 mm (1.7 in)	26 of 100 (Routine)
Miles Post Office	Australia	Record daily precipitation	26.2 mm (1.0 in)	26 of 100 (Routine)
Surat	Australia	Record daily precipitation	36.1 mm (1.4 in)	26 of 100 (Routine)
Restdown	Australia	Record daily precipitation	36.6 mm (1.4 in)	25 of 100 (Routine)
Bundaberg Post Office	Australia	Record daily precipitation	31.5 mm (1.2 in)	24 of 100 (Routine)
Inskip Point Lighthouse	Australia	Record daily precipitation	32.8 mm (1.3 in)	24 of 100 (Routine)
Brisbane Regional Office	Australia	Record daily precipitation	35.1 mm (1.4 in)	24 of 100 (Routine)
Sandgate Post Office	Australia	Record daily precipitation	33.0 mm (1.3 in)	23 of 100 (Routine)
Beenleigh Post Office	Australia	Record daily precipitation	31.8 mm (1.3 in)	22 of 100 (Routine)
Toowoomba	Australia	Record daily precipitation	47.8 mm (1.9 in)	22 of 100 (Routine)
St George Post Office	Australia	Record daily precipitation	27.9 mm (1.1 in)	21 of 100 (Routine)
Dinby	Australia	Record daily precipitation	28.4 mm (1.1 in)	21 of 100 (Routine)
Wien	Austria	Record high maximum temperature	27.7 C (81.9 F)	21 of 100 (Routine)
Nebo	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Wanganella (Zara)	Australia	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Perth Regional Office	Australia	Record daily precipitation	10.4 mm (0.4 in)	20 of 100 (Routine)
Tranebjerg	Denmark	Record daily precipitation	11.5 mm (0.5 in)	20 of 100 (Routine)
Glen Innes Post Office	Australia	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Casino Airport	Australia	Record daily precipitation	46.7 mm (1.8 in)	20 of 100 (Routine)
Roseberry	Australia	Record daily precipitation	53.3 mm (2.1 in)	20 of 100 (Routine)
Walbundrie (Crediton Street)	Australia	Record daily precipitation	47.0 mm (1.9 in)	20 of 100 (Routine)
Darwin Post Office	Australia	Record low maximum temperature	28.9 C (84.0 F)	19 of 100 (Routine)
Alpha Post Office	Australia	Record daily precipitation	16.3 mm (0.6 in)	19 of 100 (Routine)
Margate Collins St	Australia	Record daily precipitation	31.8 mm (1.3 in)	18 of 100 (Routine)
Cumbalum (Fairview)	Australia	Record daily precipitation	45.2 mm (1.8 in)	18 of 100 (Routine)
Moose Factory	Canada	Record high minimum temperature	14.4 C (57.9 F)	18 of 100 (Routine)
Bjuroklubb	Sweden	Record daily precipitation	18.3 mm (0.7 in)	18 of 100 (Routine)
Blue Hill Coop	United States	Record daily precipitation	46.5 mm (1.8 in)	17 of 100 (Routine)
Alice Springs Post Office	Australia	Record low maximum temperature	17.1 C (62.8 F)	16 of 100 (Routine)
Millie	Australia	Record daily precipitation	32.5 mm (1.3 in)	16 of 100 (Routine)
Inverell Comparison	Australia	Record low maximum temperature	14.4 C (57.9 F)	16 of 100 (Routine)
Kremsmuenster	Austria	Record high minimum temperature	15.3 C (59.5 F)	16 of 100 (Routine)

Counts by Type and Timescale

99 records

Records set or tied on 18 September 1917 by type: Highest daily maximum 6, Lowest daily maximum 8, Highest daily minimum 8, Lowest daily minimum 3, Heaviest daily rainfall 74.

Records on 18 September 1917 by type
Record type	Records
Highest daily maximum	6
Lowest daily maximum	8
Highest daily minimum	8
Lowest daily minimum	3
Heaviest daily rainfall	74
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 1917 by timescale: all-time 0, monthly 5, daily 94.

How Much Records Were Beaten By

91 broken records

Margins by which the 91 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 43.0. Ties are not counted.

Top 20 by Significance

18 September 1917

Top 20 records on 18 September 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1917	Englesberg Village, AU	daily rain	44.5 mm (1.8 in)	38.4 mm (1.5 in)	26 years	50 of 100 (Notable)
18 September 1917	Kilkivan Post Office, AU	daily rain	43.4 mm (1.7 in)	38.3 mm (1.5 in)	27 years	45 of 100 (Notable)
18 September 1917	Stanthorpe Leslie Parade, AU	daily rain	52.8 mm (2.1 in)	40.1 mm (1.6 in)	14 years	45 of 100 (Notable)
18 September 1917	Wrixum/Fohr, DE	daily rain	31.1 mm (1.2 in)	19.1 mm (0.8 in)	23 years	42 of 100 (Notable)
18 September 1917	Emerald Post Office, AU	daily rain	32.5 mm (1.3 in)	32.5 mm (1.3 in)	33 years	41 of 100 (Notable)
18 September 1917	Esk Post Office, AU	daily rain	50.8 mm (2.0 in)	38.6 mm (1.5 in)	17 years	41 of 100 (Notable)
18 September 1917	Hawkwood Station, AU	daily rain	43.2 mm (1.7 in)	32.8 mm (1.3 in)	11 years	40 of 100 (Notable)
18 September 1917	Southport Ridgeway Ave, AU	daily rain	44.7 mm (1.8 in)	35.3 mm (1.4 in)	26 years	39 of 100 (Notable)
18 September 1917	Warwick Post Office, AU	daily rain	39.1 mm (1.5 in)	25.4 mm (1.0 in)	26 years	39 of 100 (Notable)
18 September 1917	Allora Post Office, AU	daily rain	42.4 mm (1.7 in)	28.7 mm (1.1 in)	17 years	37 of 100 (Notable)
18 September 1917	Clermont Sirius St, AU	daily rain	44.5 mm (1.8 in)	43.0 mm (1.7 in)	2 years	36 of 100 (Notable)
18 September 1917	Nanango Wills St, AU	daily rain	41.4 mm (1.6 in)	26.9 mm (1.1 in)	26 years	35 of 100 (Notable)
18 September 1917	Leyburn Post Office, AU	daily rain	50.0 mm (2.0 in)	28.2 mm (1.1 in)	17 years	35 of 100 (Notable)
18 September 1917	Grafton City Council, AU	daily rain	34.3 mm (1.4 in)	26.7 mm (1.1 in)	20 years	35 of 100 (Notable)
18 September 1917	Lismore (Centre Street), AU	daily rain	40.1 mm (1.6 in)	29.4 mm (1.2 in)	21 years	35 of 100 (Notable)
18 September 1917	Nerang Gilston Rd, AU	daily rain	39.1 mm (1.5 in)	32.0 mm (1.3 in)	12 years	33 of 100 (Routine)
18 September 1917	Cambooya Post Office, AU	daily rain	36.1 mm (1.4 in)	23.4 mm (0.9 in)	17 years	33 of 100 (Routine)
18 September 1917	Dalby Post Office, AU	daily rain	37.1 mm (1.5 in)	23.4 mm (0.9 in)	22 years	33 of 100 (Routine)
18 September 1917	Darwin Post Office, AU	daily rain	28.2 mm (1.1 in)	16.3 mm (0.6 in)	38 years	31 of 100 (Routine)
18 September 1917	Emu Park Hill St, AU	daily rain	41.1 mm (1.6 in)	29.9 mm (1.2 in)	2 years	30 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

1803 to 1917

Records set or tied on this calendar date in each year from 1803 to 1917. 1917 had 99 records.

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

Records on 09-18 in each year
Year	Records
1803	1
1811	1
1814	1
1819	1
1829	1
1832	1
1834	1
1835	1
1837	2
1847	2
1848	1
1849	1
1851	4
1859	1
1861	1
1865	1
1869	1
1871	1
1875	1
1876	2
1877	1
1879	1
1880	1
1881	1
1882	1
1885	1
1886	4
1889	6
1890	1
1891	1
1893	4
1894	2
1895	2
1896	4
1897	3
1898	5
1899	3
1900	2
1901	10
1902	8
1903	58
1904	6
1905	22
1906	16
1907	4
1908	11
1909	17
1910	5
1911	8
1912	43
1913	44
1914	56
1915	41
1916	58
1917	99
1918	57
1919	48
1920	56
1921	213
1922	45
1923	114
1924	62
1925	269
1926	205
1927	189
1928	114
1929	309
1930	124
1931	429
1932	226
1933	370
1934	188
1935	281
1936	155
1937	422
1938	373
1939	190
1940	402
1941	318
1942	1,001
1943	624
1944	503
1945	732
1946	576
1947	927
1948	427
1949	356
1950	370
1951	320
1952	340
1953	245
1954	446
1955	672
1956	587
1957	429
1958	491
1959	829
1960	351
1961	478
1962	360
1963	453
1964	282
1965	1,172
1966	498
1967	357
1968	763
1969	424
1970	377
1971	1,245
1972	691
1973	593
1974	559
1975	976
1976	615
1977	619
1978	1,162
1979	709
1980	652
1981	1,671
1982	603
1983	936
1984	951
1985	636
1986	730
1987	1,244
1988	997
1989	778
1990	904
1991	1,377
1992	821
1993	747
1994	852
1995	935
1996	1,237
1997	935
1998	1,038
1999	583
2000	1,146
2001	993
2002	828
2003	815
2004	1,027
2005	781
2006	1,309
2007	670
2008	697
2009	692
2010	1,040
2011	1,050
2012	922
2013	666
2014	682
2015	934
2016	893
2017	518
2018	1,200
2019	768
2020	682
2021	582
2022	613
2023	639
2024	687
2025	471
2026	864

Download the Data

Data for records on 1917-09-18: 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 September 1917
Margin	Records
0 to 10	47
10 to 20	21
20 to 30	14
30 to 40	7
40 to 50	2