Weather Records on 25 September 1940

517 weather records were set or tied worldwide on 25 September 1940. Highest significance: Rowlesburg 1, US.

Key Facts for 25 September 1940

On 25 September 1940, 517 weather records were set or tied at long-record stations worldwide.
86 were record highs and 118 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 21 monthly and 496 daily.
Rowlesburg 1 set a daily record precipitation of 61.0 mm (2.4 in) on 25 September 1940.
Across 163 earlier years (1825 to 2026) the same calendar date averaged 425 records.

Record Map

517 stations

517 station records on 25 September 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 25 September 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rowlesburg 1	United States	Record daily precipitation	61.0 mm (2.4 in)	60 of 100 (Major)
Grafton 1 NE	United States	Record daily precipitation	63.5 mm (2.5 in)	59 of 100 (Notable)
Buckhannon	United States	Record daily precipitation	81.3 mm (3.2 in)	56 of 100 (Notable)
Frostburg	United States	Record daily precipitation	59.2 mm (2.3 in)	53 of 100 (Notable)
Romney 1 SW	United States	Record daily precipitation	55.6 mm (2.2 in)	52 of 100 (Notable)
Bridgeport	United States	Record daily precipitation	84.8 mm (3.3 in)	51 of 100 (Notable)
State UNIV	United States	Record daily precipitation	86.1 mm (3.4 in)	51 of 100 (Notable)
Lancaster 2 NE Pump St	United States	Record daily precipitation	121.9 mm (4.8 in)	51 of 100 (Notable)
Edinburg	United States	Record daily precipitation	98.3 mm (3.9 in)	50 of 100 (Notable)
Clarksville Wwtp	United States	Record daily precipitation	49.8 mm (2.0 in)	50 of 100 (Notable)
Huntington 1	United States	Record daily precipitation	55.1 mm (2.2 in)	48 of 100 (Notable)
Elizabeth	United States	Record daily precipitation	58.2 mm (2.3 in)	47 of 100 (Notable)
Pickens 1	United States	Record daily precipitation	90.2 mm (3.6 in)	47 of 100 (Notable)
Hernando	United States	Record daily precipitation	75.7 mm (3.0 in)	46 of 100 (Notable)
Chatham	Canada	Record daily precipitation	41.9 mm (1.6 in)	45 of 100 (Notable)
Angelica	United States	Record daily precipitation	45.7 mm (1.8 in)	45 of 100 (Notable)
Fairmont	United States	Record daily precipitation	51.6 mm (2.0 in)	45 of 100 (Notable)
Ryan	United States	Record daily precipitation	54.6 mm (2.1 in)	45 of 100 (Notable)
Spencer	United States	Record daily precipitation	54.9 mm (2.2 in)	45 of 100 (Notable)
Fredericton Unb	Canada	Record daily precipitation	45.0 mm (1.8 in)	44 of 100 (Notable)
Geneve Observatoire	Switzerland	Record daily precipitation	56.3 mm (2.2 in)	44 of 100 (Notable)
Norwalk	United States	Record daily precipitation	71.6 mm (2.8 in)	44 of 100 (Notable)
Westernport	United States	Record daily precipitation	47.0 mm (1.9 in)	44 of 100 (Notable)
Hickory 1 E	United States	Record daily precipitation	102.4 mm (4.0 in)	44 of 100 (Notable)
Celina	United States	Record daily precipitation	63.5 mm (2.5 in)	44 of 100 (Notable)
Williamson	United States	Record daily precipitation	51.6 mm (2.0 in)	44 of 100 (Notable)
Derby	South Africa	Record daily precipitation	45.7 mm (1.8 in)	43 of 100 (Notable)
Frederick Police Brks	United States	Record daily precipitation	67.6 mm (2.7 in)	43 of 100 (Notable)
Woodstock 2 NE	United States	Record daily precipitation	35.6 mm (1.4 in)	43 of 100 (Notable)
New Bedford Coop	United States	Record daily precipitation	49.3 mm (1.9 in)	42 of 100 (Notable)
York 3 SSW Pump STN	United States	Record daily precipitation	103.4 mm (4.1 in)	42 of 100 (Notable)
Uniontown	United States	Record daily precipitation	42.7 mm (1.7 in)	41 of 100 (Notable)
World Trade Ctr	United States	Record daily precipitation	65.3 mm (2.6 in)	41 of 100 (Notable)
Doylestown	United States	Record daily precipitation	82.3 mm (3.2 in)	41 of 100 (Notable)
Glenville	United States	Record daily precipitation	53.3 mm (2.1 in)	41 of 100 (Notable)
Hagerstown 1E	United States	Record daily precipitation	82.3 mm (3.2 in)	40 of 100 (Notable)
Fall River	United States	Record daily precipitation	58.2 mm (2.3 in)	40 of 100 (Notable)
Purcellville	United States	Record daily precipitation	45.5 mm (1.8 in)	40 of 100 (Notable)
Charleston 1	United States	Record daily precipitation	87.6 mm (3.4 in)	40 of 100 (Notable)
Macon 2 NE	United States	Record daily precipitation	59.4 mm (2.3 in)	39 of 100 (Notable)
Cutchogue	United States	Record daily precipitation	57.4 mm (2.3 in)	39 of 100 (Notable)
George School	United States	Record daily precipitation	51.1 mm (2.0 in)	39 of 100 (Notable)
Point Escuminac	Canada	Record daily precipitation	42.2 mm (1.7 in)	38 of 100 (Notable)
Marietta Wtr Wks	United States	Record daily precipitation	43.2 mm (1.7 in)	38 of 100 (Notable)
Confluence 1 NW	United States	Record daily precipitation	34.0 mm (1.3 in)	38 of 100 (Notable)
Quakertown	United States	Record daily precipitation	76.7 mm (3.0 in)	38 of 100 (Notable)
Cave Run Lake	United States	Record daily precipitation	48.0 mm (1.9 in)	37 of 100 (Notable)
Hightstown 2 W	United States	Record daily precipitation	50.5 mm (2.0 in)	37 of 100 (Notable)
Bayard	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Middleboro	United States	Record daily precipitation	46.2 mm (1.8 in)	36 of 100 (Notable)
Enterprise	United States	Record daily precipitation	43.2 mm (1.7 in)	35 of 100 (Notable)
Albany	United States	Record daily precipitation	35.3 mm (1.4 in)	35 of 100 (Notable)
Schenley Lock 5	United States	Record daily precipitation	32.0 mm (1.3 in)	35 of 100 (Notable)
Colchester 2 W	United States	Record daily precipitation	57.9 mm (2.3 in)	34 of 100 (Routine)
Taunton	United States	Record daily precipitation	45.5 mm (1.8 in)	34 of 100 (Routine)
Columbus 4 ESE	United States	Record daily precipitation	77.2 mm (3.0 in)	34 of 100 (Routine)
Cortland	United States	Record daily precipitation	36.8 mm (1.4 in)	34 of 100 (Routine)
Scarsdale	United States	Record daily precipitation	68.6 mm (2.7 in)	34 of 100 (Routine)
Hanover	United States	Record daily precipitation	108.5 mm (4.3 in)	34 of 100 (Routine)
Lost Creek Near	United States	Record daily precipitation	77.5 mm (3.1 in)	34 of 100 (Routine)

Counts by Type and Timescale

517 records

Records set or tied on 25 September 1940 by type: Highest daily maximum 26, Lowest daily maximum 84, Highest daily minimum 60, Lowest daily minimum 34, Heaviest daily rainfall 313.

Records on 25 September 1940 by type
Record type	Records
Highest daily maximum	26
Lowest daily maximum	84
Highest daily minimum	60
Lowest daily minimum	34
Heaviest daily rainfall	313
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 25 September 1940 by timescale: all-time 0, monthly 21, daily 496.

How Much Records Were Beaten By

431 broken records

Margins by which the 431 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 104.4. Ties are not counted.

Top 20 by Significance

25 September 1940

Top 20 records on 25 September 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 September 1940	Rowlesburg 1, US	daily rain	61.0 mm (2.4 in)	49.6 mm (2.0 in)	50 years	60 of 100 (Major)
25 September 1940	Grafton 1 NE, US	daily rain	63.5 mm (2.5 in)	40.4 mm (1.6 in)	46 years	59 of 100 (Notable)
25 September 1940	Buckhannon, US	monthly rain	81.3 mm (3.2 in)	28.0 mm (1.1 in)	52 years	56 of 100 (Notable)
25 September 1940	Frostburg, US	daily rain	59.2 mm (2.3 in)	44.7 mm (1.8 in)	40 years	53 of 100 (Notable)
25 September 1940	Romney 1 SW, US	daily rain	55.6 mm (2.2 in)	40.1 mm (1.6 in)	38 years	52 of 100 (Notable)
25 September 1940	Bridgeport, US	daily rain	84.8 mm (3.3 in)	59.4 mm (2.3 in)	38 years	51 of 100 (Notable)
25 September 1940	State UNIV, US	daily rain	86.1 mm (3.4 in)	70.9 mm (2.8 in)	34 years	51 of 100 (Notable)
25 September 1940	Lancaster 2 NE Pump St, US	daily rain	121.9 mm (4.8 in)	104.4 mm (4.1 in)	26 years	51 of 100 (Notable)
25 September 1940	Edinburg, US	daily rain	98.3 mm (3.9 in)	79.5 mm (3.1 in)	24 years	50 of 100 (Notable)
25 September 1940	Clarksville Wwtp, US	daily rain	49.8 mm (2.0 in)	41.4 mm (1.6 in)	46 years	50 of 100 (Notable)
25 September 1940	Huntington 1, US	daily rain	55.1 mm (2.2 in)	41.1 mm (1.6 in)	10 years	48 of 100 (Notable)
25 September 1940	Elizabeth, US	daily rain	58.2 mm (2.3 in)	44.5 mm (1.8 in)	19 years	47 of 100 (Notable)
25 September 1940	Pickens 1, US	daily rain	90.2 mm (3.6 in)	53.4 mm (2.1 in)	14 years	47 of 100 (Notable)
25 September 1940	Hernando, US	daily rain	75.7 mm (3.0 in)	47.8 mm (1.9 in)	46 years	46 of 100 (Notable)
25 September 1940	Chatham, CA	daily rain	41.9 mm (1.6 in)	22.1 mm (0.9 in)	52 years	45 of 100 (Notable)
25 September 1940	Angelica, US	daily rain	45.7 mm (1.8 in)	33.0 mm (1.3 in)	19 years	45 of 100 (Notable)
25 September 1940	Fairmont, US	daily rain	51.6 mm (2.0 in)	38.9 mm (1.5 in)	19 years	45 of 100 (Notable)
25 September 1940	Ryan, US	daily rain	54.6 mm (2.1 in)	37.8 mm (1.5 in)	14 years	45 of 100 (Notable)
25 September 1940	Spencer, US	daily rain	54.9 mm (2.2 in)	48.8 mm (1.9 in)	4 years	45 of 100 (Notable)
25 September 1940	Fredericton Unb, CA	daily rain	45.0 mm (1.8 in)	27.2 mm (1.1 in)	52 years	44 of 100 (Notable)

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

1825 to 1940

Records set or tied on this calendar date in each year from 1825 to 1940. 1940 had 517 records.

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

Records on 09-25 in each year
Year	Records
1825	1
1834	1
1836	1
1842	1
1843	1
1847	1
1851	1
1852	1
1855	1
1857	2
1859	1
1860	1
1863	1
1865	1
1866	2
1867	2
1868	1
1871	2
1872	1
1874	1
1875	1
1877	3
1879	2
1881	3
1884	3
1885	6
1886	1
1887	3
1889	7
1891	3
1893	7
1894	3
1895	5
1896	5
1897	2
1898	1
1899	2
1900	7
1901	6
1902	11
1903	4
1904	10
1905	16
1906	7
1907	35
1908	20
1909	22
1910	5
1911	9
1912	63
1913	13
1914	15
1915	43
1916	139
1917	138
1918	16
1919	20
1920	75
1921	32
1922	47
1923	68
1924	157
1925	141
1926	740
1927	166
1928	480
1929	158
1930	489
1931	500
1932	260
1933	542
1934	394
1935	258
1936	274
1937	190
1938	335
1939	454
1940	517
1941	269
1942	970
1943	488
1944	246
1945	514
1946	292
1947	666
1948	501
1949	479
1950	1,163
1951	639
1952	515
1953	242
1954	292
1955	546
1956	503
1957	231
1958	454
1959	396
1960	694
1961	530
1962	305
1963	602
1964	403
1965	690
1966	334
1967	428
1968	300
1969	196
1970	783
1971	323
1972	706
1973	650
1974	995
1975	1,166
1976	541
1977	875
1978	462
1979	719
1980	687
1981	669
1982	759
1983	647
1984	1,305
1985	446
1986	1,766
1987	560
1988	571
1989	1,367
1990	875
1991	1,243
1992	1,346
1993	1,015
1994	666
1995	1,013
1996	648
1997	1,278
1998	1,346
1999	804
2000	1,536
2001	1,536
2002	876
2003	758
2004	519
2005	1,484
2006	767
2007	1,284
2008	766
2009	854
2010	1,125
2011	763
2012	505
2013	615
2014	800
2015	868
2016	781
2017	1,253
2018	648
2019	530
2020	1,089
2021	355
2022	301
2023	580
2024	1,120
2025	569
2026	473

Download the Data

Data for records on 1940-09-25: 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 20	330
20 to 40	72
40 to 60	25
60 to 80	3
80 to 100	0
100 to 120	1