Weather Records on 11 September 1918

62 weather records were set or tied worldwide on 11 September 1918. Highest significance: Frankfurt/Main (Feldbergstr.), DE.

Key Facts for 11 September 1918

On 11 September 1918, 62 weather records were set or tied at long-record stations worldwide.
5 were record highs and 41 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 61 daily.
Frankfurt/Main (Feldbergstr.) set a daily record precipitation of 28.0 mm (1.1 in) on 11 September 1918.
Across 164 earlier years (1809 to 2026) the same calendar date averaged 426 records.

Record Map

62 stations

62 station records on 11 September 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 September 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Frankfurt/Main (Feldbergstr.)	Germany	Record daily precipitation	28.0 mm (1.1 in)	36 of 100 (Notable)
Port Arthur	Canada	Record daily precipitation	26.9 mm (1.1 in)	28 of 100 (Routine)
Kaisersbach-Cronhutte	Germany	Record daily precipitation	25.6 mm (1.0 in)	24 of 100 (Routine)
Putten (Gld)	Netherlands	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Gravenhurst	Canada	Record low maximum temperature	13.9 C (57.0 F)	20 of 100 (Routine)
Cottam	Canada	Record daily precipitation	32.0 mm (1.3 in)	18 of 100 (Routine)
Moose Factory	Canada	Record low minimum temperature	-1.1 C (30.0 F)	17 of 100 (Routine)
Montreal McGill	Canada	Record low minimum temperature	2.8 C (37.0 F)	17 of 100 (Routine)
Bird Rocks	Canada	Record low minimum temperature	3.9 C (39.0 F)	17 of 100 (Routine)
Chatham	Canada	Record low maximum temperature	13.3 C (55.9 F)	17 of 100 (Routine)
Kunzelsau	Germany	Record daily precipitation	24.7 mm (1.0 in)	16 of 100 (Routine)
Oakbank	Canada	Record daily precipitation	11.4 mm (0.4 in)	15 of 100 (Routine)
Stonecliffe	Canada	Record low minimum temperature	-1.1 C (30.0 F)	14 of 100 (Routine)
Saint John	Canada	Record low minimum temperature	2.8 C (37.0 F)	14 of 100 (Routine)
Halifax	Canada	Record low maximum temperature	13.3 C (55.9 F)	14 of 100 (Routine)
Falsterbo	Sweden	Record daily precipitation	9.5 mm (0.37 in)	14 of 100 (Routine)
Gysinge	Sweden	Record daily precipitation	12.6 mm (0.5 in)	14 of 100 (Routine)
Renfrew	Canada	Record low maximum temperature	13.3 C (55.9 F)	13 of 100 (Routine)
Port Arthur	Canada	Record low maximum temperature	10.0 C (50.0 F)	12 of 100 (Routine)
Stonecliffe	Canada	Record low maximum temperature	12.2 C (54.0 F)	12 of 100 (Routine)
Parry Sound	Canada	Record low maximum temperature	14.4 C (57.9 F)	12 of 100 (Routine)
Varberg	Sweden	Record daily precipitation	20.0 mm (0.8 in)	12 of 100 (Routine)
Karesuando	Sweden	Record daily precipitation	7.6 mm (0.30 in)	12 of 100 (Routine)
Yamba Pilot Station	Australia	Record daily precipitation	20.3 mm (0.8 in)	11 of 100 (Routine)
Chatham 2	Canada	Record daily precipitation	21.1 mm (0.8 in)	11 of 100 (Routine)
Haliburton A	Canada	Record low minimum temperature	-1.7 C (28.9 F)	11 of 100 (Routine)
Bird Rocks	Canada	Record low maximum temperature	11.7 C (53.1 F)	11 of 100 (Routine)
Medicine Hat A	Canada	Record high maximum temperature	30.6 C (87.1 F)	10 of 100 (Routine)
Swift Current	Canada	Record high maximum temperature	29.4 C (84.9 F)	10 of 100 (Routine)
Quebec	Canada	Record low minimum temperature	-1.1 C (30.0 F)	10 of 100 (Routine)
Montreal McGill	Canada	Record low maximum temperature	12.8 C (55.0 F)	10 of 100 (Routine)
Lucknow	Canada	Record low maximum temperature	12.2 C (54.0 F)	9 of 100 (Routine)
London South	Canada	Record low maximum temperature	14.4 C (57.9 F)	9 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record low minimum temperature	7.5 C (45.5 F)	9 of 100 (Routine)
Zerbst	Germany	Record daily precipitation	9.9 mm (0.39 in)	9 of 100 (Routine)
Cairns Post Office	Australia	Record daily precipitation	6.1 mm (0.24 in)	8 of 100 (Routine)
Calgary Int'l A	Canada	Record high maximum temperature	27.8 C (82.0 F)	8 of 100 (Routine)
Southampton	Canada	Record low maximum temperature	12.2 C (54.0 F)	8 of 100 (Routine)
Coldwater	Canada	Record low minimum temperature	-2.2 C (28.0 F)	7 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record daily precipitation	14.0 mm (0.6 in)	7 of 100 (Routine)
Alma	United States	Record low maximum temperature	16.1 C (61.0 F)	7 of 100 (Routine)
Portland	United States	Record low maximum temperature	11.7 C (53.1 F)	6 of 100 (Routine)
Peterborough	Canada	Record low maximum temperature	15.0 C (59.0 F)	5 of 100 (Routine)
San Diego Wbo	United States	Record high minimum temperature	22.2 C (72.0 F)	5 of 100 (Routine)
Blue Hill Coop	United States	Record low maximum temperature	12.8 C (55.0 F)	5 of 100 (Routine)
Halifax	Canada	Record low minimum temperature	4.4 C (39.9 F)	4 of 100 (Routine)
La Crosse Wb City	United States	Record low maximum temperature	15.6 C (60.1 F)	4 of 100 (Routine)
Kingston Queens U	Canada	Record low minimum temperature	3.9 C (39.0 F)	3 of 100 (Routine)
Parry Sound	Canada	Record low minimum temperature	1.7 C (35.1 F)	3 of 100 (Routine)
Stratford	Canada	Record low maximum temperature	15.6 C (60.1 F)	3 of 100 (Routine)
Chatham	Canada	Record low minimum temperature	2.2 C (36.0 F)	3 of 100 (Routine)
Belle Isle	Canada	Record low minimum temperature	1.7 C (35.1 F)	2 of 100 (Routine)
Port Dover	Canada	Record low maximum temperature	14.4 C (57.9 F)	1 of 100 (Routine)
Woodstock	Canada	Record low maximum temperature	13.9 C (57.0 F)	1 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	14.4 C (57.9 F)	1 of 100 (Routine)
Quebec	Canada	Record low maximum temperature	12.2 C (54.0 F)	1 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	12.8 C (55.0 F)	1 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record low maximum temperature	14.0 C (57.2 F)	1 of 100 (Routine)
Storrs	United States	Record low minimum temperature	3.9 C (39.0 F)	1 of 100 (Routine)
Portland	United States	Record low minimum temperature	3.9 C (39.0 F)	1 of 100 (Routine)

Counts by Type and Timescale

62 records

Records set or tied on 11 September 1918 by type: Highest daily maximum 3, Lowest daily maximum 25, Highest daily minimum 2, Lowest daily minimum 16, Heaviest daily rainfall 16.

Records on 11 September 1918 by type
Record type	Records
Highest daily maximum	3
Lowest daily maximum	25
Highest daily minimum	2
Lowest daily minimum	16
Heaviest daily rainfall	16
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 September 1918 by timescale: all-time 0, monthly 1, daily 61.

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 16.8. Ties are not counted.

Top 20 by Significance

11 September 1918

Top 20 records on 11 September 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 September 1918	Frankfurt/Main (Feldbergstr.), DE	daily rain	28.0 mm (1.1 in)	10.9 mm (0.4 in)	43 years	36 of 100 (Notable)
11 September 1918	Port Arthur, CA	daily rain	26.9 mm (1.1 in)	16.2 mm (0.6 in)	31 years	28 of 100 (Routine)
11 September 1918	Kaisersbach-Cronhutte, DE	daily rain	25.6 mm (1.0 in)	13.1 mm (0.5 in)	16 years	24 of 100 (Routine)
11 September 1918	Putten (Gld), NL	daily rain	19.6 mm (0.8 in)	9.0 mm (0.35 in)	16 years	20 of 100 (Routine)
11 September 1918	Gravenhurst, CA	daily low max	13.9 C (57.0 F)	2.2 C (4.0 F)	42 years	20 of 100 (Routine)
11 September 1918	Cottam, CA	daily rain	32.0 mm (1.3 in)	16.8 mm (0.7 in)	3 years	18 of 100 (Routine)
11 September 1918	Moose Factory, CA	daily low min	-1.1 C (30.0 F)	3.3 C (5.9 F)	20 years	17 of 100 (Routine)
11 September 1918	Montreal McGill, CA	daily low min	2.8 C (37.0 F)	1.6 C (2.9 F)	34 years	17 of 100 (Routine)
11 September 1918	Bird Rocks, CA	daily low min	3.9 C (39.0 F)	2.8 C (5.0 F)	18 years	17 of 100 (Routine)
11 September 1918	Chatham, CA	daily low max	13.3 C (55.9 F)	0.6 C (1.1 F)	42 years	17 of 100 (Routine)
11 September 1918	Kunzelsau, DE	daily rain	24.7 mm (1.0 in)	6.0 mm (0.24 in)	16 years	16 of 100 (Routine)
11 September 1918	Oakbank, CA	daily rain	11.4 mm (0.4 in)	5.0 mm (0.20 in)	27 years	15 of 100 (Routine)
11 September 1918	Stonecliffe, CA	daily low min	-1.1 C (30.0 F)	0.5 C (0.9 F)	32 years	14 of 100 (Routine)
11 September 1918	Saint John, CA	daily low min	2.8 C (37.0 F)	0.5 C (0.9 F)	32 years	14 of 100 (Routine)
11 September 1918	Halifax, CA	daily low max	13.3 C (55.9 F)	1.7 C (3.1 F)	22 years	14 of 100 (Routine)
11 September 1918	Falsterbo, SE	daily rain	9.5 mm (0.37 in)	2.2 mm (0.09 in)	25 years	14 of 100 (Routine)
11 September 1918	Gysinge, SE	daily rain	12.6 mm (0.5 in)	1.6 mm (0.06 in)	29 years	14 of 100 (Routine)
11 September 1918	Renfrew, CA	daily low max	13.3 C (55.9 F)	1.1 C (2.0 F)	27 years	13 of 100 (Routine)
11 September 1918	Port Arthur, CA	daily low max	10.0 C (50.0 F)	3.3 C (5.9 F)	4 years	12 of 100 (Routine)
11 September 1918	Stonecliffe, CA	daily low max	12.2 C (54.0 F)	3.4 C (6.1 F)	8 years	12 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

1809 to 1918

Records set or tied on this calendar date in each year from 1809 to 1918. 1918 had 62 records.

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

Records on 09-11 in each year
Year	Records
1809	1
1814	3
1818	1
1830	1
1836	1
1838	3
1839	1
1848	1
1850	1
1851	1
1854	2
1858	1
1860	2
1861	1
1863	2
1865	3
1866	1
1874	2
1876	1
1877	1
1879	1
1880	1
1882	4
1883	2
1884	1
1886	1
1888	2
1889	4
1890	2
1891	2
1892	1
1893	4
1894	2
1895	4
1896	1
1897	3
1898	3
1899	5
1900	1
1901	3
1902	15
1903	13
1904	4
1905	5
1906	10
1907	9
1908	20
1909	12
1910	19
1911	9
1912	25
1913	22
1914	52
1915	160
1916	17
1917	88
1918	62
1919	52
1920	158
1921	52
1922	78
1923	44
1924	290
1925	260
1926	137
1927	300
1928	127
1929	206
1930	136
1931	868
1932	210
1933	276
1934	144
1935	410
1936	567
1937	324
1938	288
1939	561
1940	891
1941	210
1942	234
1943	335
1944	446
1945	341
1946	262
1947	611
1948	424
1949	450
1950	462
1951	247
1952	549
1953	392
1954	363
1955	479
1956	539
1957	470
1958	748
1959	488
1960	423
1961	524
1962	480
1963	359
1964	1,195
1965	414
1966	392
1967	478
1968	835
1969	685
1970	474
1971	464
1972	507
1973	612
1974	430
1975	644
1976	920
1977	406
1978	911
1979	596
1980	474
1981	347
1982	862
1983	1,243
1984	888
1985	844
1986	1,221
1987	595
1988	1,019
1989	1,301
1990	840
1991	843
1992	672
1993	809
1994	713
1995	619
1996	1,030
1997	808
1998	1,821
1999	1,073
2000	1,469
2001	826
2002	1,059
2003	1,022
2004	740
2005	1,163
2006	1,132
2007	947
2008	916
2009	774
2010	965
2011	1,051
2012	687
2013	1,207
2014	1,100
2015	683
2016	677
2017	916
2018	763
2019	806
2020	1,235
2021	851
2022	617
2023	1,034
2024	889
2025	917
2026	615

Download the Data

Data for records on 1918-09-11: 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 3	26
3 to 5	9
5 to 8	2
8 to 10	2
10 to 13	1
13 to 15	1
15 to 18	2