Weather Records on 20 September 1918

59 weather records were set or tied worldwide on 20 September 1918. Highest significance: Murphy 4ESE, US.

Key Facts for 20 September 1918

On 20 September 1918, 59 weather records were set or tied at long-record stations worldwide.
12 were record highs and 28 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 58 daily.
Murphy 4ESE set a daily record precipitation of 35.3 mm (1.4 in) on 20 September 1918.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 445 records.

Record Map

59 stations

59 station records on 20 September 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Murphy 4ESE	United States	Record daily precipitation	35.3 mm (1.4 in)	33 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Junsele	Sweden	Record daily precipitation	15.5 mm (0.6 in)	20 of 100 (Routine)
Haparanda	Sweden	Record daily precipitation	14.8 mm (0.6 in)	20 of 100 (Routine)
Tarnaby	Sweden	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Jokkmokk	Sweden	Record daily precipitation	10.1 mm (0.4 in)	20 of 100 (Routine)
Wiarton	Canada	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Malvern	United States	Record daily precipitation	43.2 mm (1.7 in)	20 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record low maximum temperature	12.2 C (54.0 F)	19 of 100 (Routine)
Philadelphia City	United States	Record daily precipitation	23.1 mm (0.9 in)	19 of 100 (Routine)
Little Rock St Capitol	United States	Record low maximum temperature	17.2 C (63.0 F)	18 of 100 (Routine)
Harrisburg - Coop	United States	Record daily precipitation	23.9 mm (0.9 in)	18 of 100 (Routine)
Huron Rgnl AP	United States	Record low minimum temperature	-4.4 C (24.1 F)	17 of 100 (Routine)
Lexington Bluegrass AP	United States	Record low maximum temperature	13.3 C (55.9 F)	17 of 100 (Routine)
Kingston Queens U	Canada	Record daily precipitation	18.0 mm (0.7 in)	16 of 100 (Routine)
Chatham	Canada	Record daily precipitation	27.2 mm (1.1 in)	16 of 100 (Routine)
Burlington	United States	Record low maximum temperature	10.6 C (51.1 F)	16 of 100 (Routine)
Chattanooga Wb City	United States	Record low maximum temperature	17.8 C (64.0 F)	16 of 100 (Routine)
Haliburton A	Canada	Record daily precipitation	15.0 mm (0.6 in)	15 of 100 (Routine)
Grahamstown	South Africa	Record daily precipitation	9.1 mm (0.36 in)	15 of 100 (Routine)
Cobar Post Office	Australia	Record high maximum temperature	33.3 C (91.9 F)	14 of 100 (Routine)
Port Alfred	South Africa	Record daily precipitation	21.6 mm (0.9 in)	14 of 100 (Routine)
Athens	United States	Record daily precipitation	16.5 mm (0.6 in)	14 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record low minimum temperature	-3.9 C (25.0 F)	14 of 100 (Routine)
Green Bay	United States	Record low maximum temperature	11.1 C (52.0 F)	14 of 100 (Routine)
Sydney (Observatory Hill)	Australia	Record high maximum temperature	28.3 C (82.9 F)	13 of 100 (Routine)
Bird Rocks	Canada	Record daily precipitation	12.7 mm (0.5 in)	13 of 100 (Routine)
Point Escuminac	Canada	Record daily precipitation	26.2 mm (1.0 in)	13 of 100 (Routine)
Kingston Queens U	Canada	Record low maximum temperature	12.2 C (54.0 F)	12 of 100 (Routine)
Hvar	Croatia	Record high maximum temperature	29.0 C (84.2 F)	12 of 100 (Routine)
Hvar	Croatia	Record high minimum temperature	21.5 C (70.7 F)	12 of 100 (Routine)
Lincoln UNIV Pwr Plt	United States	Record low minimum temperature	-0.6 C (30.9 F)	12 of 100 (Routine)
Lucknow	Canada	Record low maximum temperature	11.1 C (52.0 F)	11 of 100 (Routine)
Lucknow	Canada	Record low minimum temperature	0.6 C (33.1 F)	11 of 100 (Routine)
Port Stanley	Canada	Record low minimum temperature	3.3 C (37.9 F)	11 of 100 (Routine)
Sydney	Canada	Record high maximum temperature	25.0 C (77.0 F)	10 of 100 (Routine)
Cottbus	Germany	Record daily precipitation	4.5 mm (0.18 in)	10 of 100 (Routine)
Alma	United States	Record low maximum temperature	12.8 C (55.0 F)	10 of 100 (Routine)
Houston Wb City	United States	Record low maximum temperature	23.3 C (73.9 F)	10 of 100 (Routine)
Calgary Int'l A	Canada	Record high minimum temperature	11.7 C (53.1 F)	9 of 100 (Routine)
London South	Canada	Record low minimum temperature	2.8 C (37.0 F)	9 of 100 (Routine)
Alton	Canada	Record low maximum temperature	10.0 C (50.0 F)	9 of 100 (Routine)
Forbes (Camp Street)	Australia	Record high maximum temperature	29.4 C (84.9 F)	8 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	11.7 C (53.1 F)	8 of 100 (Routine)
Concordia ASOS	United States	Record low minimum temperature	0.6 C (33.1 F)	8 of 100 (Routine)
Tbilisi	Georgia	Record high minimum temperature	17.2 C (63.0 F)	5 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record high minimum temperature	16.1 C (61.0 F)	4 of 100 (Routine)
Port Stanley	Canada	Record low maximum temperature	12.8 C (55.0 F)	4 of 100 (Routine)
Woodstock	Canada	Record low maximum temperature	10.6 C (51.1 F)	4 of 100 (Routine)
Philadelphia City	United States	Record low minimum temperature	8.9 C (48.0 F)	4 of 100 (Routine)
Dubuque River	United States	Record low maximum temperature	12.2 C (54.0 F)	4 of 100 (Routine)
Stony Mountain	Canada	Record low minimum temperature	-3.9 C (25.0 F)	3 of 100 (Routine)
Malvern	United States	Record low maximum temperature	20.6 C (69.1 F)	3 of 100 (Routine)
Cobar Post Office	Australia	Record high minimum temperature	16.1 C (61.0 F)	2 of 100 (Routine)
Lakefield	Canada	Record low maximum temperature	13.9 C (57.0 F)	2 of 100 (Routine)
Bird Rocks	Canada	Record high minimum temperature	13.3 C (55.9 F)	2 of 100 (Routine)
Pitea	Sweden	Record high minimum temperature	8.0 C (46.4 F)	2 of 100 (Routine)
Stornoway Airport	United Kingdom	Record low maximum temperature	9.4 C (48.9 F)	2 of 100 (Routine)
Lincoln UNIV Pwr Plt	United States	Record low maximum temperature	16.1 C (61.0 F)	1 of 100 (Routine)

Counts by Type and Timescale

59 records

Records set or tied on 20 September 1918 by type: Highest daily maximum 5, Lowest daily maximum 19, Highest daily minimum 7, Lowest daily minimum 9, Heaviest daily rainfall 19.

Records on 20 September 1918 by type
Record type	Records
Highest daily maximum	5
Lowest daily maximum	19
Highest daily minimum	7
Lowest daily minimum	9
Heaviest daily rainfall	19
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1918 by timescale: all-time 0, monthly 1, daily 58.

How Much Records Were Beaten By

46 broken records

Margins by which the 46 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 27.7. Ties are not counted.

Top 20 by Significance

20 September 1918

Top 20 records on 20 September 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1918	Murphy 4ESE, US	daily rain	35.3 mm (1.4 in)	27.7 mm (1.1 in)	38 years	33 of 100 (Routine)
20 September 1918	Kvikkjokk-Arrenjarka, SE	daily rain	15.0 mm (0.6 in)	10.1 mm (0.4 in)	31 years	20 of 100 (Routine)
20 September 1918	Junsele, SE	daily rain	15.5 mm (0.6 in)	8.5 mm (0.33 in)	28 years	20 of 100 (Routine)
20 September 1918	Haparanda, SE	daily rain	14.8 mm (0.6 in)	2.2 mm (0.09 in)	48 years	20 of 100 (Routine)
20 September 1918	Tarnaby, SE	daily rain	10.2 mm (0.4 in)	6.1 mm (0.24 in)	12 years	20 of 100 (Routine)
20 September 1918	Jokkmokk, SE	daily rain	10.1 mm (0.4 in)	2.3 mm (0.09 in)	41 years	20 of 100 (Routine)
20 September 1918	Wiarton, CA	daily rain	16.3 mm (0.6 in)	7.9 mm (0.31 in)	34 years	20 of 100 (Routine)
20 September 1918	Malvern, US	daily rain	43.2 mm (1.7 in)	27.7 mm (1.1 in)	4 years	20 of 100 (Routine)
20 September 1918	Cleveland 2717 Euclid, US	daily low max	12.2 C (54.0 F)	0.6 C (1.1 F)	46 years	19 of 100 (Routine)
20 September 1918	Philadelphia City, US	daily rain	23.1 mm (0.9 in)	4.0 mm (0.16 in)	43 years	19 of 100 (Routine)
20 September 1918	Little Rock St Capitol, US	daily low max	17.2 C (63.0 F)	3.4 C (6.1 F)	21 years	18 of 100 (Routine)
20 September 1918	Harrisburg - Coop, US	daily rain	23.9 mm (0.9 in)	12.5 mm (0.5 in)	18 years	18 of 100 (Routine)
20 September 1918	Huron Rgnl AP, US	daily low min	-4.4 C (24.1 F)	5.0 C (9.0 F)	16 years	17 of 100 (Routine)
20 September 1918	Lexington Bluegrass AP, US	daily low max	13.3 C (55.9 F)	0.6 C (1.1 F)	42 years	17 of 100 (Routine)
20 September 1918	Kingston Queens U, CA	daily rain	18.0 mm (0.7 in)	1.0 mm (0.04 in)	37 years	16 of 100 (Routine)
20 September 1918	Chatham, CA	daily rain	27.2 mm (1.1 in)	5.4 mm (0.21 in)	23 years	16 of 100 (Routine)
20 September 1918	Burlington, US	daily low max	10.6 C (51.1 F)	3.3 C (5.9 F)	21 years	16 of 100 (Routine)
20 September 1918	Chattanooga Wb City, US	daily low max	17.8 C (64.0 F)	2.8 C (5.0 F)	16 years	16 of 100 (Routine)
20 September 1918	Haliburton A, CA	daily rain	15.0 mm (0.6 in)	2.3 mm (0.09 in)	33 years	15 of 100 (Routine)
20 September 1918	Grahamstown, ZA	daily rain	9.1 mm (0.36 in)	1.2 mm (0.05 in)	36 years	15 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

1812 to 1918

Records set or tied on this calendar date in each year from 1812 to 1918. 1918 had 59 records.

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

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 1918-09-20: 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	36
5 to 10	5
10 to 15	3
15 to 20	0
20 to 25	0
25 to 30	2