Weather Records on 12 September 1918

42 weather records were set or tied worldwide on 12 September 1918. Highest significance: Sacramento 5 ESE, US.

Key Facts for 12 September 1918

On 12 September 1918, 42 weather records were set or tied at long-record stations worldwide.
6 were record highs and 19 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 2 monthly and 39 daily.
Sacramento 5 ESE set a monthly record daily precipitation of 79.5 mm (3.1 in) on 12 September 1918.
Across 164 earlier years (1793 to 2026) the same calendar date averaged 416 records.

Record Map

42 stations

42 station records on 12 September 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 September 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sacramento 5 ESE	United States	Record daily precipitation	79.5 mm (3.1 in)	58 of 100 (Notable)
Chatham	Canada	Record low maximum temperature	11.7 C (53.1 F)	24 of 100 (Routine)
London South	Canada	Record daily precipitation	36.3 mm (1.4 in)	22 of 100 (Routine)
Hoofddorp	Netherlands	Record daily precipitation	40.1 mm (1.6 in)	22 of 100 (Routine)
Pointe Au Pere	Canada	Record low maximum temperature	8.9 C (48.0 F)	19 of 100 (Routine)
Charlottetown	Canada	Record low minimum temperature	5.0 C (41.0 F)	19 of 100 (Routine)
Anticosti SW Point	Canada	Record low maximum temperature	5.6 C (42.1 F)	18 of 100 (Routine)
Bowen Post Office	Australia	Record daily precipitation	0.8 mm (0.03 in)	17 of 100 (Routine)
Quebec	Canada	Record low maximum temperature	9.4 C (48.9 F)	17 of 100 (Routine)
Kargopol	Russia	Record daily precipitation	12.8 mm (0.5 in)	17 of 100 (Routine)
Casino Airport	Australia	Record daily precipitation	11.9 mm (0.5 in)	15 of 100 (Routine)
Lock #4	United States	Record daily precipitation	17.8 mm (0.7 in)	15 of 100 (Routine)
Lakefield	Canada	Record daily precipitation	28.4 mm (1.1 in)	14 of 100 (Routine)
Fredericton Unb	Canada	Record low maximum temperature	11.7 C (53.1 F)	14 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record high maximum temperature	22.9 C (73.2 F)	14 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record low minimum temperature	8.4 C (47.1 F)	13 of 100 (Routine)
Kiev	Ukraine	Record daily precipitation	12.9 mm (0.5 in)	13 of 100 (Routine)
Roseberry	Australia	Record daily precipitation	9.4 mm (0.37 in)	11 of 100 (Routine)
Bird Rocks	Canada	Record low maximum temperature	10.0 C (50.0 F)	11 of 100 (Routine)
Arnsberg	Germany	Record daily precipitation	19.2 mm (0.8 in)	11 of 100 (Routine)
Zerbst	Germany	Record daily precipitation	9.8 mm (0.39 in)	11 of 100 (Routine)
Coldwater	Canada	Record low maximum temperature	13.9 C (57.0 F)	10 of 100 (Routine)
Calgary Int'l A	Canada	Record high minimum temperature	8.9 C (48.0 F)	9 of 100 (Routine)
Alton	Canada	Record daily precipitation	19.6 mm (0.8 in)	9 of 100 (Routine)
Pointe Au Pere	Canada	Record low minimum temperature	1.1 C (34.0 F)	9 of 100 (Routine)
Muncheberg	Germany	Record daily precipitation	6.8 mm (0.27 in)	9 of 100 (Routine)
Belle Isle	Canada	Record low minimum temperature	1.7 C (35.1 F)	8 of 100 (Routine)
Visby_Flygplats	Sweden	Record daily precipitation	23.5 mm (0.9 in)	8 of 100 (Routine)
Karlshamn	Sweden	Record low maximum temperature	13.5 C (56.3 F)	8 of 100 (Routine)
San Diego Wbo	United States	Record high minimum temperature	22.8 C (73.0 F)	8 of 100 (Routine)
Astoria	United States	Record high maximum temperature	26.1 C (79.0 F)	7 of 100 (Routine)
Winnemucca AP	United States	Record high minimum temperature	14.4 C (57.9 F)	6 of 100 (Routine)
Lawrence Post Office	Australia	Record daily precipitation	6.1 mm (0.24 in)	5 of 100 (Routine)
Yarmouth	Canada	Record low minimum temperature	1.7 C (35.1 F)	5 of 100 (Routine)
Ekaterinburg	Russia	Record low minimum temperature	-2.4 C (27.7 F)	5 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	6.7 C (44.1 F)	5 of 100 (Routine)
Hamilton	Canada	Record daily precipitation	27.9 mm (1.1 in)	4 of 100 (Routine)
Portland	United States	Record low maximum temperature	13.3 C (55.9 F)	3 of 100 (Routine)
Edmonton	Canada	Record high maximum temperature	25.6 C (78.1 F)	1 of 100 (Routine)
Alton	Canada	Record low maximum temperature	14.4 C (57.9 F)	1 of 100 (Routine)
Fredericton Unb	Canada	Record low minimum temperature	-0.6 C (30.9 F)	1 of 100 (Routine)
Kristianstad	Sweden	Record low maximum temperature	14.0 C (57.2 F)	1 of 100 (Routine)

Counts by Type and Timescale

42 records

Records set or tied on 12 September 1918 by type: Highest daily maximum 3, Lowest daily maximum 11, Highest daily minimum 3, Lowest daily minimum 8, Heaviest daily rainfall 17.

Records on 12 September 1918 by type
Record type	Records
Highest daily maximum	3
Lowest daily maximum	11
Highest daily minimum	3
Lowest daily minimum	8
Heaviest daily rainfall	17
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 September 1918 by timescale: all-time 1, monthly 2, daily 39.

How Much Records Were Beaten By

35 broken records

Margins by which the 35 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 35.3. Ties are not counted.

Top 20 by Significance

12 September 1918

Top 20 records on 12 September 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 September 1918	Sacramento 5 ESE, US	monthly rain	79.5 mm (3.1 in)	35.3 mm (1.4 in)	13 years	58 of 100 (Notable)
12 September 1918	Chatham, CA	daily low max	11.7 C (53.1 F)	3.3 C (5.9 F)	43 years	24 of 100 (Routine)
12 September 1918	London South, CA	daily rain	36.3 mm (1.4 in)	15.5 mm (0.6 in)	3 years	22 of 100 (Routine)
12 September 1918	Hoofddorp, NL	monthly rain	40.1 mm (1.6 in)	0.5 mm (0.02 in)	25 years	22 of 100 (Routine)
12 September 1918	Pointe Au Pere, CA	daily low max	8.9 C (48.0 F)	2.2 C (4.0 F)	33 years	19 of 100 (Routine)
12 September 1918	Charlottetown, CA	daily low min	5.0 C (41.0 F)	1.1 C (2.0 F)	42 years	19 of 100 (Routine)
12 September 1918	Anticosti SW Point, CA	daily low max	5.6 C (42.1 F)	2.2 C (4.0 F)	32 years	18 of 100 (Routine)
12 September 1918	Bowen Post Office, AU	daily rain	0.8 mm (0.03 in)	0.8 mm (0.03 in)	44 years	17 of 100 (Routine)
12 September 1918	Quebec, CA	daily low max	9.4 C (48.9 F)	3.9 C (7.0 F)	19 years	17 of 100 (Routine)
12 September 1918	Kargopol, RU	daily rain	12.8 mm (0.5 in)	5.3 mm (0.21 in)	8 years	17 of 100 (Routine)
12 September 1918	Casino Airport, AU	daily rain	11.9 mm (0.5 in)	1.7 mm (0.07 in)	28 years	15 of 100 (Routine)
12 September 1918	Lock #4, US	daily rain	17.8 mm (0.7 in)	3.3 mm (0.13 in)	30 years	15 of 100 (Routine)
12 September 1918	Lakefield, CA	daily rain	28.4 mm (1.1 in)	2.5 mm (0.10 in)	27 years	14 of 100 (Routine)
12 September 1918	Fredericton Unb, CA	daily low max	11.7 C (53.1 F)	2.2 C (4.0 F)	19 years	14 of 100 (Routine)
12 September 1918	Nuwara Eliya, LK	daily high max	22.9 C (73.2 F)	0.2 C (0.4 F)	32 years	14 of 100 (Routine)
12 September 1918	Nuwara Eliya, LK	daily low min	8.4 C (47.1 F)	1.3 C (2.3 F)	5 years	13 of 100 (Routine)
12 September 1918	Kiev, UA	daily rain	12.9 mm (0.5 in)	1.3 mm (0.05 in)	28 years	13 of 100 (Routine)
12 September 1918	Roseberry, AU	daily rain	9.4 mm (0.37 in)	0.5 mm (0.02 in)	28 years	11 of 100 (Routine)
12 September 1918	Bird Rocks, CA	daily low max	10.0 C (50.0 F)	0.6 C (1.1 F)	20 years	11 of 100 (Routine)
12 September 1918	Arnsberg, DE	daily rain	19.2 mm (0.8 in)	2.8 mm (0.11 in)	16 years	11 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 1918

Records set or tied on this calendar date in each year from 1793 to 1918. 1918 had 42 records.

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

Records on 09-12 in each year
Year	Records
1793	2
1809	1
1813	1
1814	2
1834	1
1837	2
1839	1
1847	1
1848	1
1854	4
1859	2
1860	2
1865	2
1866	1
1867	1
1868	2
1869	1
1872	2
1876	1
1878	1
1880	1
1881	1
1882	1
1884	2
1885	2
1886	1
1887	2
1888	2
1889	1
1891	4
1892	1
1893	4
1894	1
1895	5
1896	2
1897	3
1898	3
1899	4
1900	1
1901	5
1902	11
1903	18
1904	7
1905	8
1906	24
1907	11
1908	12
1909	11
1910	4
1911	15
1912	20
1913	12
1914	49
1915	71
1916	21
1917	231
1918	42
1919	69
1920	49
1921	60
1922	136
1923	33
1924	177
1925	443
1926	89
1927	339
1928	155
1929	118
1930	198
1931	648
1932	199
1933	360
1934	176
1935	441
1936	515
1937	318
1938	332
1939	702
1940	891
1941	172
1942	337
1943	544
1944	393
1945	414
1946	302
1947	596
1948	292
1949	512
1950	578
1951	399
1952	575
1953	515
1954	313
1955	457
1956	389
1957	727
1958	783
1959	536
1960	772
1961	750
1962	407
1963	466
1964	836
1965	459
1966	416
1967	510
1968	428
1969	558
1970	619
1971	593
1972	430
1973	588
1974	575
1975	1,102
1976	539
1977	524
1978	952
1979	765
1980	511
1981	424
1982	993
1983	915
1984	700
1985	876
1986	787
1987	686
1988	997
1989	1,313
1990	1,001
1991	672
1992	767
1993	798
1994	550
1995	532
1996	1,014
1997	737
1998	1,770
1999	938
2000	1,188
2001	797
2002	883
2003	830
2004	653
2005	1,032
2006	963
2007	776
2008	1,213
2009	876
2010	939
2011	988
2012	639
2013	1,066
2014	1,374
2015	704
2016	748
2017	1,114
2018	595
2019	884
2020	566
2021	513
2022	739
2023	844
2024	1,009
2025	433
2026	627

Download the Data

Data for records on 1918-09-12: 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	32
5 to 10	1
10 to 15	0
15 to 20	1
20 to 25	0
25 to 30	0
30 to 35	0
35 to 40	1