Weather Records on 20 September 1920

64 weather records were set or tied worldwide on 20 September 1920. Highest significance: Bologna, IT.

Key Facts for 20 September 1920

On 20 September 1920, 64 weather records were set or tied at long-record stations worldwide.
14 were record highs and 44 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 64 daily.
Bologna set a daily record high minimum temperature of 23.1 C (73.6 F) on 20 September 1920.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 445 records.

Record Map

64 stations

64 station records on 20 September 1920 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1920: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bologna	Italy	Record high minimum temperature	23.1 C (73.6 F)	45 of 100 (Notable)
Oxford	United Kingdom	Record low maximum temperature	11.5 C (52.7 F)	35 of 100 (Notable)
Marseille Obs. Palais-Lonchamp	France	Record daily precipitation	82.0 mm (3.2 in)	34 of 100 (Routine)
Toronto	Canada	Record low maximum temperature	11.1 C (52.0 F)	25 of 100 (Routine)
Barrie	Canada	Record low maximum temperature	8.3 C (46.9 F)	23 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	1.7 C (35.1 F)	23 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	11.1 C (52.0 F)	22 of 100 (Routine)
Kunzelsau	Germany	Record daily precipitation	25.5 mm (1.0 in)	22 of 100 (Routine)
Woodstock	Canada	Record low maximum temperature	8.9 C (48.0 F)	21 of 100 (Routine)
Anna Creek	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Medicine Hat A	Canada	Record high minimum temperature	16.1 C (61.0 F)	20 of 100 (Routine)
Montreal McGill	Canada	Record low minimum temperature	3.9 C (39.0 F)	19 of 100 (Routine)
Port Stanley	Canada	Record low maximum temperature	12.2 C (54.0 F)	18 of 100 (Routine)
Constantine	Algeria	Record high minimum temperature	20.0 C (68.0 F)	17 of 100 (Routine)
London South	Canada	Record low maximum temperature	9.4 C (48.9 F)	17 of 100 (Routine)
Stoney Creek	Canada	Record low maximum temperature	11.7 C (53.1 F)	15 of 100 (Routine)
Lindsay	Canada	Record low maximum temperature	8.9 C (48.0 F)	15 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	11.1 C (52.0 F)	15 of 100 (Routine)
Moose Factory	Canada	Record low minimum temperature	-3.9 C (25.0 F)	14 of 100 (Routine)
Haparanda	Sweden	Record high minimum temperature	10.9 C (51.6 F)	14 of 100 (Routine)
Fort National	Algeria	Record high minimum temperature	23.0 C (73.4 F)	13 of 100 (Routine)
Qu'appelle	Canada	Record high maximum temperature	30.0 C (86.0 F)	13 of 100 (Routine)
Gravenhurst	Canada	Record low maximum temperature	8.3 C (46.9 F)	13 of 100 (Routine)
Owen Sound	Canada	Record low maximum temperature	9.4 C (48.9 F)	13 of 100 (Routine)
Southampton	Canada	Record low minimum temperature	1.1 C (34.0 F)	13 of 100 (Routine)
Port Dover	Canada	Record low maximum temperature	11.1 C (52.0 F)	13 of 100 (Routine)
Haliburton A	Canada	Record low minimum temperature	-2.2 C (28.0 F)	13 of 100 (Routine)
Lakefield	Canada	Record low minimum temperature	1.7 C (35.1 F)	13 of 100 (Routine)
Indian Head Cda	Canada	Record high maximum temperature	31.1 C (88.0 F)	12 of 100 (Routine)
Jakutsk	Russia	Record daily precipitation	2.9 mm (0.11 in)	12 of 100 (Routine)
Franklin	United States	Record high minimum temperature	15.6 C (60.1 F)	12 of 100 (Routine)
Paris	Canada	Record low maximum temperature	11.7 C (53.1 F)	11 of 100 (Routine)
Spokane Intl AP	United States	Record daily precipitation	1.3 mm (0.05 in)	11 of 100 (Routine)
Saint John	Canada	Record low minimum temperature	3.3 C (37.9 F)	9 of 100 (Routine)
Harrisburg - Coop	United States	Record low minimum temperature	5.6 C (42.1 F)	9 of 100 (Routine)
Constantine	Algeria	Record high maximum temperature	35.0 C (95.0 F)	8 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	0.6 C (33.1 F)	7 of 100 (Routine)
Cape May 2 NW	United States	Record low minimum temperature	7.2 C (45.0 F)	7 of 100 (Routine)
Kingston Queens U	Canada	Record low maximum temperature	11.1 C (52.0 F)	6 of 100 (Routine)
Lucknow	Canada	Record low maximum temperature	9.4 C (48.9 F)	6 of 100 (Routine)
St. Petersburg	Russia	Record high minimum temperature	12.2 C (54.0 F)	6 of 100 (Routine)
Lucknow	Canada	Record low minimum temperature	0.0 C (32.0 F)	4 of 100 (Routine)
Portland	United States	Record low minimum temperature	4.4 C (39.9 F)	4 of 100 (Routine)
Somerville 4 NW	United States	Record low minimum temperature	2.8 C (37.0 F)	4 of 100 (Routine)
Philadelphia City	United States	Record low minimum temperature	8.9 C (48.0 F)	4 of 100 (Routine)
Ny City Cntrl Park	United States	Record low minimum temperature	7.2 C (45.0 F)	4 of 100 (Routine)
Karesuando	Sweden	Record high minimum temperature	6.0 C (42.8 F)	3 of 100 (Routine)
Gardiner	United States	Record low maximum temperature	12.8 C (55.0 F)	3 of 100 (Routine)
Tashkent	Uzbekistan	Record high minimum temperature	16.7 C (62.1 F)	3 of 100 (Routine)
Moonagee	Australia	Record daily precipitation	6.4 mm (0.25 in)	2 of 100 (Routine)
Gunnedah Pool	Australia	Record low maximum temperature	15.6 C (60.1 F)	2 of 100 (Routine)
Swift Current	Canada	Record high minimum temperature	12.2 C (54.0 F)	2 of 100 (Routine)
Kingston Queens U	Canada	Record low minimum temperature	3.9 C (39.0 F)	2 of 100 (Routine)
Beatrice	Canada	Record low minimum temperature	-1.1 C (30.0 F)	2 of 100 (Routine)
Coldwater	Canada	Record low maximum temperature	10.0 C (50.0 F)	2 of 100 (Routine)
Port Dover	Canada	Record low minimum temperature	3.9 C (39.0 F)	2 of 100 (Routine)
Paris	Canada	Record low minimum temperature	2.2 C (36.0 F)	2 of 100 (Routine)
Stoney Creek	Canada	Record low minimum temperature	3.3 C (37.9 F)	2 of 100 (Routine)
Sheffield	United Kingdom	Record low maximum temperature	12.2 C (54.0 F)	2 of 100 (Routine)
Blue Hill Coop	United States	Record low maximum temperature	13.3 C (55.9 F)	2 of 100 (Routine)

Counts by Type and Timescale

64 records

Records set or tied on 20 September 1920 by type: Highest daily maximum 4, Lowest daily maximum 22, Highest daily minimum 10, Lowest daily minimum 22, Heaviest daily rainfall 6.

Records on 20 September 1920 by type
Record type	Records
Highest daily maximum	4
Lowest daily maximum	22
Highest daily minimum	10
Lowest daily minimum	22
Heaviest daily rainfall	6
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1920 by timescale: all-time 0, monthly 0, daily 64.

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 44.2. Ties are not counted.

Top 20 by Significance

20 September 1920

Top 20 records on 20 September 1920 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1920	Bologna, IT	daily high min	23.1 C (73.6 F)	1.6 C (2.9 F)	100 years	45 of 100 (Notable)
20 September 1920	Oxford, GB	daily low max	11.5 C (52.7 F)	0.1 C (0.2 F)	83 years	35 of 100 (Notable)
20 September 1920	Marseille Obs. Palais-Lonchamp, FR	daily rain	82.0 mm (3.2 in)	44.2 mm (1.7 in)	10 years	34 of 100 (Routine)
20 September 1920	Toronto, CA	daily low max	11.1 C (52.0 F)	0.6 C (1.1 F)	53 years	25 of 100 (Routine)
20 September 1920	Barrie, CA	daily low max	8.3 C (46.9 F)	1.1 C (2.0 F)	53 years	23 of 100 (Routine)
20 September 1920	Blue Hill Coop, US	daily low min	1.7 C (35.1 F)	4.4 C (7.9 F)	33 years	23 of 100 (Routine)
20 September 1920	Hamilton, CA	daily low max	11.1 C (52.0 F)	0.6 C (1.1 F)	53 years	22 of 100 (Routine)
20 September 1920	Kunzelsau, DE	daily rain	25.5 mm (1.0 in)	12.8 mm (0.5 in)	6 years	22 of 100 (Routine)
20 September 1920	Woodstock, CA	daily low max	8.9 C (48.0 F)	1.7 C (3.1 F)	44 years	21 of 100 (Routine)
20 September 1920	Anna Creek, AU	daily rain	12.7 mm (0.5 in)	12.7 mm (0.5 in)	36 years	20 of 100 (Routine)
20 September 1920	Medicine Hat A, CA	daily high min	16.1 C (61.0 F)	3.9 C (7.0 F)	27 years	20 of 100 (Routine)
20 September 1920	Montreal McGill, CA	daily low min	3.9 C (39.0 F)	0.5 C (0.9 F)	44 years	19 of 100 (Routine)
20 September 1920	Port Stanley, CA	daily low max	12.2 C (54.0 F)	0.6 C (1.1 F)	44 years	18 of 100 (Routine)
20 September 1920	Constantine, DZ	daily high min	20.0 C (68.0 F)	2.0 C (3.6 F)	27 years	17 of 100 (Routine)
20 September 1920	London South, CA	daily low max	9.4 C (48.9 F)	3.4 C (6.1 F)	29 years	17 of 100 (Routine)
20 September 1920	Stoney Creek, CA	daily low max	11.7 C (53.1 F)	2.2 C (4.0 F)	29 years	15 of 100 (Routine)
20 September 1920	Lindsay, CA	daily low max	8.9 C (48.0 F)	2.8 C (5.0 F)	22 years	15 of 100 (Routine)
20 September 1920	Yarmouth, CA	daily low max	11.1 C (52.0 F)	2.2 C (4.0 F)	12 years	15 of 100 (Routine)
20 September 1920	Moose Factory, CA	daily low min	-3.9 C (25.0 F)	1.7 C (3.1 F)	23 years	14 of 100 (Routine)
20 September 1920	Haparanda, SE	daily high min	10.9 C (51.6 F)	2.4 C (4.3 F)	19 years	14 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 1920

Records set or tied on this calendar date in each year from 1812 to 1920. 1920 had 64 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 1920-09-20: 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).

Histogram of margins by which records were beaten on 20 September 1920
Margin	Records
0 to 10	40
10 to 20	2
20 to 30	0
30 to 40	0
40 to 50	1