Weather Records on 30 September 1920

71 weather records were set or tied worldwide on 30 September 1920. Highest significance: Brome, CA.

Key Facts for 30 September 1920

On 30 September 1920, 71 weather records were set or tied at long-record stations worldwide.
18 were record highs and 15 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 66 daily.
Brome set a monthly record daily precipitation of 86.4 mm (3.4 in) on 30 September 1920.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 442 records.

Record Map

71 stations

71 station records on 30 September 1920 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1920: highest significance records shown on the map
Station	Country	Type	Value	Significance
Brome	Canada	Record daily precipitation	86.4 mm (3.4 in)	51 of 100 (Notable)
Setauket Strong	United States	Record daily precipitation	86.9 mm (3.4 in)	50 of 100 (Notable)
Northfield	United States	Record daily precipitation	58.7 mm (2.3 in)	50 of 100 (Notable)
Newark Liberty Intl AP	United States	Record daily precipitation	90.2 mm (3.6 in)	50 of 100 (Notable)
Leominster	United States	Record daily precipitation	90.4 mm (3.6 in)	47 of 100 (Notable)
Wilmington Wb City	United States	Record daily precipitation	88.4 mm (3.5 in)	42 of 100 (Notable)
Harrisburg - Coop	United States	Record daily precipitation	50.8 mm (2.0 in)	40 of 100 (Notable)
Vineland	United States	Record daily precipitation	47.0 mm (1.9 in)	38 of 100 (Notable)
Hanover	United States	Record daily precipitation	57.7 mm (2.3 in)	37 of 100 (Notable)
Washington	United States	Record daily precipitation	35.3 mm (1.4 in)	37 of 100 (Notable)
Portland	United States	Record daily precipitation	54.4 mm (2.1 in)	36 of 100 (Notable)
Gardiner	United States	Record daily precipitation	61.7 mm (2.4 in)	35 of 100 (Notable)
Baltimore Customs House	United States	Record daily precipitation	40.6 mm (1.6 in)	35 of 100 (Notable)
World Trade Ctr	United States	Record daily precipitation	45.5 mm (1.8 in)	32 of 100 (Routine)
Concord	United States	Record daily precipitation	94.5 mm (3.7 in)	31 of 100 (Routine)
Paterson	United States	Record daily precipitation	68.6 mm (2.7 in)	31 of 100 (Routine)
Cornwall	United States	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Chattanooga Wb City	United States	Record low maximum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Reading Wb City	United States	Record daily precipitation	48.0 mm (1.9 in)	27 of 100 (Routine)
Ny City Cntrl Park	United States	Record daily precipitation	56.1 mm (2.2 in)	27 of 100 (Routine)
Montgomery Wb City	United States	Record low maximum temperature	16.7 C (62.1 F)	26 of 100 (Routine)
Tampa	United States	Record low minimum temperature	16.7 C (62.1 F)	26 of 100 (Routine)
Burlington	United States	Record daily precipitation	44.2 mm (1.7 in)	26 of 100 (Routine)
Middletown 4 W	United States	Record daily precipitation	49.5 mm (1.9 in)	25 of 100 (Routine)
Tampa	United States	Record daily precipitation	51.3 mm (2.0 in)	25 of 100 (Routine)
Pine Bluff	United States	Record low maximum temperature	17.2 C (63.0 F)	23 of 100 (Routine)
Plymouth	United States	Record daily precipitation	65.5 mm (2.6 in)	23 of 100 (Routine)
Tempe Downs	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Yarmouth	Canada	Record high maximum temperature	22.2 C (72.0 F)	20 of 100 (Routine)
St John's	Canada	Record high minimum temperature	15.6 C (60.1 F)	20 of 100 (Routine)
Cape May 2 NW	United States	Record daily precipitation	36.8 mm (1.4 in)	19 of 100 (Routine)
Atlantic City Marina	United States	Record daily precipitation	26.9 mm (1.1 in)	19 of 100 (Routine)
Jacksonville Wb City	United States	Record low minimum temperature	11.7 C (53.1 F)	19 of 100 (Routine)
Irkutsk	Russia	Record high maximum temperature	22.3 C (72.1 F)	18 of 100 (Routine)
Somerville 4 NW	United States	Record daily precipitation	34.8 mm (1.4 in)	18 of 100 (Routine)
Lake Cochituate	United States	Record daily precipitation	49.0 mm (1.9 in)	16 of 100 (Routine)
Fort Chipewyan	Canada	Record high maximum temperature	17.2 C (63.0 F)	15 of 100 (Routine)
Port Jervis	United States	Record daily precipitation	43.4 mm (1.7 in)	14 of 100 (Routine)
Glenville	United States	Record daily precipitation	11.4 mm (0.4 in)	14 of 100 (Routine)
Nemours (Ghazaouet)	Algeria	Record high minimum temperature	21.0 C (69.8 F)	13 of 100 (Routine)
Yielima Post Office	Australia	Record daily precipitation	10.2 mm (0.4 in)	13 of 100 (Routine)
Somerville 4 NW	United States	Record high minimum temperature	19.4 C (66.9 F)	13 of 100 (Routine)
Lexington Bluegrass AP	United States	Record low maximum temperature	10.0 C (50.0 F)	13 of 100 (Routine)
Darwin Post Office	Australia	Record low minimum temperature	21.4 C (70.5 F)	12 of 100 (Routine)
Sydney	Canada	Record high minimum temperature	16.1 C (61.0 F)	12 of 100 (Routine)
Calgary Int'l A	Canada	Record high maximum temperature	30.0 C (86.0 F)	11 of 100 (Routine)
Anticosti SW Point	Canada	Record high minimum temperature	10.0 C (50.0 F)	11 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record high minimum temperature	14.1 C (57.4 F)	11 of 100 (Routine)
Crookston NW Exp STN	United States	Record low minimum temperature	-5.0 C (23.0 F)	11 of 100 (Routine)
Asheville Pearson St	United States	Record daily precipitation	20.8 mm (0.8 in)	11 of 100 (Routine)
Fredericton Unb	Canada	Record daily precipitation	31.8 mm (1.3 in)	10 of 100 (Routine)
Blue Hill Coop	United States	Record high minimum temperature	17.2 C (63.0 F)	10 of 100 (Routine)
Lowell	United States	Record high maximum temperature	26.7 C (80.1 F)	10 of 100 (Routine)
Lowell	United States	Record high minimum temperature	16.1 C (61.0 F)	10 of 100 (Routine)
Cobar Post Office	Australia	Record low maximum temperature	13.9 C (57.0 F)	9 of 100 (Routine)
Tampa	United States	Record low maximum temperature	26.7 C (80.1 F)	9 of 100 (Routine)
Moose Factory	Canada	Record low minimum temperature	-3.3 C (26.1 F)	8 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record daily precipitation	24.6 mm (1.0 in)	8 of 100 (Routine)
Banff	Canada	Record high maximum temperature	21.1 C (70.0 F)	7 of 100 (Routine)
Chatillon-Sur-Seine	France	Record daily precipitation	20.6 mm (0.8 in)	6 of 100 (Routine)

Counts by Type and Timescale

71 records

Records set or tied on 30 September 1920 by type: Highest daily maximum 7, Lowest daily maximum 9, Highest daily minimum 11, Lowest daily minimum 6, Heaviest daily rainfall 38.

Records on 30 September 1920 by type
Record type	Records
Highest daily maximum	7
Lowest daily maximum	9
Highest daily minimum	11
Lowest daily minimum	6
Heaviest daily rainfall	38
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 September 1920 by timescale: all-time 0, monthly 5, daily 66.

How Much Records Were Beaten By

62 broken records

Margins by which the 62 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.5. Ties are not counted.

Top 20 by Significance

30 September 1920

Top 20 records on 30 September 1920 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1920	Brome, CA	monthly rain	86.4 mm (3.4 in)	31.8 mm (1.3 in)	15 years	51 of 100 (Notable)
30 September 1920	Setauket Strong, US	daily rain	86.9 mm (3.4 in)	61.5 mm (2.4 in)	24 years	50 of 100 (Notable)
30 September 1920	Northfield, US	daily rain	58.7 mm (2.3 in)	42.4 mm (1.7 in)	24 years	50 of 100 (Notable)
30 September 1920	Newark Liberty Intl AP, US	daily rain	90.2 mm (3.6 in)	55.4 mm (2.2 in)	49 years	50 of 100 (Notable)
30 September 1920	Leominster, US	daily rain	90.4 mm (3.6 in)	58.6 mm (2.3 in)	23 years	47 of 100 (Notable)
30 September 1920	Wilmington Wb City, US	daily rain	88.4 mm (3.5 in)	51.3 mm (2.0 in)	46 years	42 of 100 (Notable)
30 September 1920	Harrisburg - Coop, US	daily rain	50.8 mm (2.0 in)	43.4 mm (1.7 in)	7 years	40 of 100 (Notable)
30 September 1920	Vineland, US	daily rain	47.0 mm (1.9 in)	30.5 mm (1.2 in)	49 years	38 of 100 (Notable)
30 September 1920	Hanover, US	daily rain	57.7 mm (2.3 in)	27.7 mm (1.1 in)	24 years	37 of 100 (Notable)
30 September 1920	Washington, US	daily rain	35.3 mm (1.4 in)	18.8 mm (0.7 in)	63 years	37 of 100 (Notable)
30 September 1920	Portland, US	daily rain	54.4 mm (2.1 in)	30.8 mm (1.2 in)	23 years	36 of 100 (Notable)
30 September 1920	Gardiner, US	daily rain	61.7 mm (2.4 in)	32.2 mm (1.3 in)	23 years	35 of 100 (Notable)
30 September 1920	Baltimore Customs House, US	daily rain	40.6 mm (1.6 in)	30.7 mm (1.2 in)	43 years	35 of 100 (Notable)
30 September 1920	World Trade Ctr, US	daily rain	45.5 mm (1.8 in)	27.0 mm (1.1 in)	36 years	32 of 100 (Routine)
30 September 1920	Concord, US	monthly rain	94.5 mm (3.7 in)	1.8 mm (0.07 in)	52 years	31 of 100 (Routine)
30 September 1920	Paterson, US	daily rain	68.6 mm (2.7 in)	21.1 mm (0.8 in)	49 years	31 of 100 (Routine)
30 September 1920	Cornwall, US	daily rain	50.8 mm (2.0 in)	30.5 mm (1.2 in)	3 years	31 of 100 (Routine)
30 September 1920	Chattanooga Wb City, US	monthly low max	11.7 C (53.1 F)	4.4 C (7.9 F)	20 years	31 of 100 (Routine)
30 September 1920	Reading Wb City, US	daily rain	48.0 mm (1.9 in)	11.2 mm (0.4 in)	49 years	27 of 100 (Routine)
30 September 1920	Ny City Cntrl Park, US	daily rain	56.1 mm (2.2 in)	14.7 mm (0.6 in)	49 years	27 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

1806 to 1920

Records set or tied on this calendar date in each year from 1806 to 1920. 1920 had 71 records.

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

Records on 09-30 in each year
Year	Records
1806	1
1813	1
1817	1
1819	2
1834	1
1841	1
1842	1
1847	1
1853	1
1854	1
1855	1
1861	1
1862	1
1866	1
1868	2
1869	3
1870	1
1874	1
1877	1
1878	1
1881	5
1883	2
1885	1
1886	3
1887	1
1888	4
1889	1
1892	2
1893	3
1894	8
1895	5
1896	2
1897	3
1898	3
1899	12
1900	4
1901	11
1902	7
1903	9
1904	14
1905	25
1906	14
1907	16
1908	18
1909	10
1910	5
1911	47
1912	47
1913	10
1914	33
1915	84
1916	209
1917	19
1918	45
1919	28
1920	71
1921	61
1922	71
1923	183
1924	243
1925	211
1926	194
1927	486
1928	560
1929	181
1930	110
1931	225
1932	363
1933	437
1934	398
1935	209
1936	432
1937	417
1938	428
1939	371
1940	316
1941	482
1942	405
1943	404
1944	369
1945	889
1946	320
1947	433
1948	267
1949	366
1950	731
1951	597
1952	504
1953	1,136
1954	1,059
1955	406
1956	350
1957	663
1958	442
1959	1,159
1960	161
1961	618
1962	202
1963	818
1964	332
1965	459
1966	592
1967	859
1968	449
1969	465
1970	334
1971	1,359
1972	676
1973	407
1974	742
1975	686
1976	775
1977	870
1978	399
1979	479
1980	832
1981	688
1982	806
1983	1,102
1984	1,267
1985	1,892
1986	1,805
1987	649
1988	453
1989	713
1990	665
1991	949
1992	980
1993	988
1994	816
1995	1,061
1996	1,396
1997	729
1998	1,206
1999	1,144
2000	887
2001	699
2002	677
2003	1,079
2004	573
2005	761
2006	617
2007	841
2008	585
2009	826
2010	1,059
2011	1,258
2012	637
2013	634
2014	529
2015	997
2016	746
2017	404
2018	717
2019	2,192
2020	554
2021	823
2022	563
2023	1,012
2024	948
2025	559
2026	523

Download the Data

Data for records on 1920-09-30: 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 10	36
10 to 20	9
20 to 30	5
30 to 40	6
40 to 50	2
50 to 60	3
60 to 70	1