Weather Records on 18 September 2017

518 weather records were set or tied worldwide on 18 September 2017. Highest significance: Cairns Post Office, AU.

Key Facts for 18 September 2017

On 18 September 2017, 518 weather records were set or tied at long-record stations worldwide.
240 were record highs and 79 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 507 daily.
Cairns Post Office set a daily record precipitation of 46.5 mm (1.8 in) on 18 September 2017.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 421 records.

Record Map

518 stations

518 station records on 18 September 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cairns Post Office	Australia	Record daily precipitation	46.5 mm (1.8 in)	71 of 100 (Major)
Lake Echo Power Station	Australia	Record daily precipitation	110.4 mm (4.3 in)	65 of 100 (Major)
Suttsu	Japan	Record daily precipitation	126.0 mm (5.0 in)	60 of 100 (Major)
Hiroo	Japan	Record daily precipitation	215.9 mm (8.5 in)	56 of 100 (Notable)
Skriveri	Latvia	Record daily precipitation	41.9 mm (1.6 in)	56 of 100 (Notable)
Spakenburg	Netherlands	Record daily precipitation	25.8 mm (1.0 in)	55 of 100 (Notable)
Cozy Cove	United States	Record daily precipitation	40.6 mm (1.6 in)	52 of 100 (Notable)
Birzai	Lithuania	Record daily precipitation	33.0 mm (1.3 in)	51 of 100 (Notable)
Sovetsk	Lithuania	Record daily precipitation	43.6 mm (1.7 in)	51 of 100 (Notable)
Zheleznodorozhnyj	Belarus	Record daily precipitation	46.8 mm (1.8 in)	49 of 100 (Notable)
Lookout	United States	Record daily precipitation	33.0 mm (1.3 in)	47 of 100 (Notable)
Matsuyama	Japan	Record daily precipitation	187.5 mm (7.4 in)	46 of 100 (Notable)
Humboldt Gulch	United States	Record daily precipitation	61.0 mm (2.4 in)	46 of 100 (Notable)
Deadwood Summit	United States	Record daily precipitation	45.7 mm (1.8 in)	46 of 100 (Notable)
Bear Canyon	United States	Record daily precipitation	35.6 mm (1.4 in)	45 of 100 (Notable)
Banner Summit	United States	Record daily precipitation	45.7 mm (1.8 in)	45 of 100 (Notable)
Aluksne	Latvia	Record daily precipitation	52.1 mm (2.1 in)	44 of 100 (Notable)
Maizuru Reg Met HQ	Japan	Record daily precipitation	103.9 mm (4.1 in)	43 of 100 (Notable)
Laukuva	Lithuania	Record daily precipitation	34.0 mm (1.3 in)	43 of 100 (Notable)
Thiruvananthapuram	India	Record daily precipitation	69.1 mm (2.7 in)	42 of 100 (Notable)
Okecie	Poland	Record daily precipitation	41.4 mm (1.6 in)	42 of 100 (Notable)
Meadow Lake	United States	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Falls City 2 SSW	United States	Record low maximum temperature	16.1 C (61.0 F)	41 of 100 (Notable)
Red Hill	United States	Record daily precipitation	55.9 mm (2.2 in)	41 of 100 (Notable)
Zoseni	Latvia	Record daily precipitation	35.1 mm (1.4 in)	40 of 100 (Notable)
Ratnagiri	India	Record daily precipitation	108.0 mm (4.3 in)	38 of 100 (Notable)
Derbent	Russia	Record high maximum temperature	29.7 C (85.5 F)	37 of 100 (Notable)
Bolotnoe	Russia	Record high minimum temperature	13.4 C (56.1 F)	36 of 100 (Notable)
Jump Off Joe	United States	Record daily precipitation	40.6 mm (1.6 in)	36 of 100 (Notable)
Roaring River	United States	Record daily precipitation	35.6 mm (1.4 in)	36 of 100 (Notable)
Vasilevici	Belarus	Record high minimum temperature	14.9 C (58.8 F)	35 of 100 (Notable)
Okayama	Japan	Record daily precipitation	116.6 mm (4.6 in)	35 of 100 (Notable)
Long Beach Exp STN	United States	Record low maximum temperature	8.9 C (48.0 F)	35 of 100 (Notable)
Lievelde	Netherlands	Record daily precipitation	32.7 mm (1.3 in)	34 of 100 (Routine)
Lost Lake	United States	Record daily precipitation	43.2 mm (1.7 in)	34 of 100 (Routine)
Onslow Airport	Australia	Record high minimum temperature	21.9 C (71.4 F)	33 of 100 (Routine)
Craig	United States	Record low maximum temperature	12.2 C (54.0 F)	33 of 100 (Routine)
Burroughs Creek	United States	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Tottori	Japan	Record daily precipitation	153.4 mm (6.0 in)	32 of 100 (Routine)
Moskalvo	Russia	Record high minimum temperature	13.0 C (55.4 F)	32 of 100 (Routine)
Konya	Turkey	Record high minimum temperature	21.9 C (71.4 F)	32 of 100 (Routine)
Takamatsu	Japan	Record daily precipitation	162.6 mm (6.4 in)	31 of 100 (Routine)
Kaliningrad	Russia	Record daily precipitation	49.4 mm (1.9 in)	31 of 100 (Routine)
Roseburg Rgnl AP	United States	Record low maximum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Lysa Hora	Czech Republic	Record daily precipitation	54.1 mm (2.1 in)	30 of 100 (Routine)
Brest-Guipavas	France	Record low minimum temperature	3.3 C (37.9 F)	30 of 100 (Routine)
Kutaisi	Georgia	Record high maximum temperature	35.8 C (96.4 F)	30 of 100 (Routine)
Balasore	India	Record daily precipitation	87.1 mm (3.4 in)	30 of 100 (Routine)
Tuapse	Russia	Record high minimum temperature	22.0 C (71.6 F)	30 of 100 (Routine)
Puntilla	United States	Record high minimum temperature	6.1 C (43.0 F)	30 of 100 (Routine)
Railroad Overpass	United States	Record daily precipitation	35.6 mm (1.4 in)	30 of 100 (Routine)
Turpan	China	Record high minimum temperature	22.0 C (71.6 F)	29 of 100 (Routine)
Brjansk	Russia	Record high minimum temperature	14.6 C (58.3 F)	29 of 100 (Routine)
Akhty	Russia	Record high maximum temperature	30.2 C (86.4 F)	29 of 100 (Routine)
Weaverville	United States	Record high minimum temperature	15.6 C (60.1 F)	29 of 100 (Routine)
Jackman	United States	Record high maximum temperature	27.2 C (81.0 F)	29 of 100 (Routine)
Touchet	United States	Record daily precipitation	25.4 mm (1.0 in)	29 of 100 (Routine)
Holland Meadows	United States	Record daily precipitation	30.5 mm (1.2 in)	29 of 100 (Routine)
Richmond Raaf	Australia	Record low minimum temperature	0.9 C (33.6 F)	28 of 100 (Routine)
Mosnov	Czech Republic	Record daily precipitation	30.2 mm (1.2 in)	28 of 100 (Routine)

Counts by Type and Timescale

518 records

Records set or tied on 18 September 2017 by type: Highest daily maximum 118, Lowest daily maximum 44, Highest daily minimum 122, Lowest daily minimum 35, Heaviest daily rainfall 199.

Records on 18 September 2017 by type
Record type	Records
Highest daily maximum	118
Lowest daily maximum	44
Highest daily minimum	122
Lowest daily minimum	35
Heaviest daily rainfall	199
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 2017 by timescale: all-time 0, monthly 11, daily 507.

How Much Records Were Beaten By

420 broken records

Margins by which the 420 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 103.5. Ties are not counted.

Top 20 by Significance

18 September 2017

Top 20 records on 18 September 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 2017	Cairns Post Office, AU	daily rain	46.5 mm (1.8 in)	24.4 mm (1.0 in)	128 years	71 of 100 (Major)
18 September 2017	Lake Echo Power Station, AU	monthly rain	110.4 mm (4.3 in)	68.4 mm (2.7 in)	32 years	65 of 100 (Major)
18 September 2017	Suttsu, JP	daily rain	126.0 mm (5.0 in)	71.0 mm (2.8 in)	47 years	60 of 100 (Major)
18 September 2017	Hiroo, JP	daily rain	215.9 mm (8.5 in)	103.5 mm (4.1 in)	59 years	56 of 100 (Notable)
18 September 2017	Skriveri, LV	daily rain	41.9 mm (1.6 in)	25.8 mm (1.0 in)	34 years	56 of 100 (Notable)
18 September 2017	Spakenburg, NL	daily rain	25.8 mm (1.0 in)	19.4 mm (0.8 in)	66 years	55 of 100 (Notable)
18 September 2017	Cozy Cove, US	daily rain	40.6 mm (1.6 in)	35.5 mm (1.4 in)	31 years	52 of 100 (Notable)
18 September 2017	Birzai, LT	daily rain	33.0 mm (1.3 in)	17.0 mm (0.7 in)	38 years	51 of 100 (Notable)
18 September 2017	Sovetsk, LT	daily rain	43.6 mm (1.7 in)	31.9 mm (1.3 in)	16 years	51 of 100 (Notable)
18 September 2017	Zheleznodorozhnyj, BY	daily rain	46.8 mm (1.8 in)	33.2 mm (1.3 in)	16 years	49 of 100 (Notable)
18 September 2017	Lookout, US	daily rain	33.0 mm (1.3 in)	22.8 mm (0.9 in)	28 years	47 of 100 (Notable)
18 September 2017	Matsuyama, JP	monthly rain	187.5 mm (7.4 in)	35.0 mm (1.4 in)	41 years	46 of 100 (Notable)
18 September 2017	Humboldt Gulch, US	daily rain	61.0 mm (2.4 in)	48.3 mm (1.9 in)	12 years	46 of 100 (Notable)
18 September 2017	Deadwood Summit, US	daily rain	45.7 mm (1.8 in)	35.5 mm (1.4 in)	12 years	46 of 100 (Notable)
18 September 2017	Bear Canyon, US	daily rain	35.6 mm (1.4 in)	30.5 mm (1.2 in)	12 years	45 of 100 (Notable)
18 September 2017	Banner Summit, US	daily rain	45.7 mm (1.8 in)	30.5 mm (1.2 in)	12 years	45 of 100 (Notable)
18 September 2017	Aluksne, LV	monthly rain	52.1 mm (2.1 in)	12.0 mm (0.5 in)	7 years	44 of 100 (Notable)
18 September 2017	Maizuru Reg Met HQ, JP	daily rain	103.9 mm (4.1 in)	50.8 mm (2.0 in)	63 years	43 of 100 (Notable)
18 September 2017	Laukuva, LT	daily rain	34.0 mm (1.3 in)	19.9 mm (0.8 in)	28 years	43 of 100 (Notable)
18 September 2017	Thiruvananthapuram, IN	daily rain	69.1 mm (2.7 in)	18.3 mm (0.7 in)	76 years	42 of 100 (Notable)

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 2017

Records set or tied on this calendar date in each year from 1803 to 2017. 2017 had 518 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 2017-09-18: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	388
20 to 40	24
40 to 60	5
60 to 80	2
80 to 100	0
100 to 120	1