Weather Records on 20 September 1945

406 weather records were set or tied worldwide on 20 September 1945. Highest significance: Armstrong, CA.

Key Facts for 20 September 1945

On 20 September 1945, 406 weather records were set or tied at long-record stations worldwide.
54 were record highs and 124 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 397 daily.
Armstrong set a monthly record daily precipitation of 40.1 mm (1.6 in) on 20 September 1945.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 442 records.

Record Map

406 stations

406 station records on 20 September 1945 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1945: highest significance records shown on the map
Station	Country	Type	Value	Significance
Armstrong	Canada	Record daily precipitation	40.1 mm (1.6 in)	57 of 100 (Notable)
Jennings	United States	Record daily precipitation	109.2 mm (4.3 in)	57 of 100 (Notable)
Kunghari	India	Record daily precipitation	143.8 mm (5.7 in)	54 of 100 (Notable)
Jeypore	India	Record daily precipitation	152.4 mm (6.0 in)	52 of 100 (Notable)
Pithapuram	India	Record daily precipitation	76.2 mm (3.0 in)	49 of 100 (Notable)
Narsipatnam	India	Record daily precipitation	98.6 mm (3.9 in)	49 of 100 (Notable)
Tobolsk	Russia	Record daily precipitation	28.7 mm (1.1 in)	49 of 100 (Notable)
Polavaram	India	Record daily precipitation	94.0 mm (3.7 in)	46 of 100 (Notable)
Coeur D'Alene	United States	Record daily precipitation	34.3 mm (1.4 in)	43 of 100 (Notable)
Sandpoint Exp STN	United States	Record daily precipitation	36.8 mm (1.4 in)	43 of 100 (Notable)
Calgary Int'l A	Canada	Record daily precipitation	30.5 mm (1.2 in)	41 of 100 (Notable)
Oxford	United Kingdom	Record high minimum temperature	16.1 C (61.0 F)	40 of 100 (Notable)
Hillsdown	Canada	Record daily precipitation	27.2 mm (1.1 in)	39 of 100 (Notable)
Strathmore	Canada	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Uralsk	Kazakhstan	Record daily precipitation	25.9 mm (1.0 in)	39 of 100 (Notable)
Peddapuram	India	Record daily precipitation	77.5 mm (3.1 in)	36 of 100 (Notable)
Priest Rvr Exp STN	United States	Record daily precipitation	33.3 mm (1.3 in)	36 of 100 (Notable)
Big Creek	Canada	Record daily snowfall	6.4 cm (2.5 in)	32 of 100 (Routine)
Colville	United States	Record daily precipitation	25.7 mm (1.0 in)	32 of 100 (Routine)
Malakapuram	India	Record daily precipitation	60.5 mm (2.4 in)	31 of 100 (Routine)
Prathipadu	India	Record daily precipitation	73.2 mm (2.9 in)	30 of 100 (Routine)
Mangalgiri	India	Record daily precipitation	61.0 mm (2.4 in)	30 of 100 (Routine)
Anakapalli	India	Record daily precipitation	60.5 mm (2.4 in)	30 of 100 (Routine)
Ram/Udayagiri	India	Record daily precipitation	112.0 mm (4.4 in)	30 of 100 (Routine)
Emerson	Canada	Record low maximum temperature	6.7 C (44.1 F)	29 of 100 (Routine)
Tuni	India	Record daily precipitation	90.4 mm (3.6 in)	28 of 100 (Routine)
Dhamtari	India	Record daily precipitation	79.8 mm (3.1 in)	28 of 100 (Routine)
Chikhalda Sr	India	Record daily precipitation	104.6 mm (4.1 in)	28 of 100 (Routine)
Wani	India	Record daily precipitation	178.1 mm (7.0 in)	28 of 100 (Routine)
Crystal Springs Exp STN	United States	Record daily precipitation	133.4 mm (5.3 in)	28 of 100 (Routine)
Morgan	United States	Record low minimum temperature	-8.9 C (16.0 F)	28 of 100 (Routine)
Konda	India	Record daily precipitation	54.6 mm (2.1 in)	27 of 100 (Routine)
Kovvur	India	Record daily precipitation	41.9 mm (1.6 in)	26 of 100 (Routine)
Wetaskiwin	Canada	Record daily snowfall	12.7 cm (5.0 in)	25 of 100 (Routine)
Yellavaram	India	Record daily precipitation	73.7 mm (2.9 in)	25 of 100 (Routine)
Nawarangpur	India	Record daily precipitation	58.4 mm (2.3 in)	25 of 100 (Routine)
Clinton 1SSW	United States	Record daily precipitation	33.5 mm (1.3 in)	25 of 100 (Routine)
Collegeville St Joe AP	United States	Record daily precipitation	31.8 mm (1.3 in)	25 of 100 (Routine)
Lacombe Cda	Canada	Record daily precipitation	30.0 mm (1.2 in)	24 of 100 (Routine)
Jagdalpur	India	Record daily precipitation	61.0 mm (2.4 in)	24 of 100 (Routine)
Bhainsdehi	India	Record daily precipitation	68.3 mm (2.7 in)	24 of 100 (Routine)
Raj-Nilgiri	India	Record daily precipitation	79.8 mm (3.1 in)	24 of 100 (Routine)
Buzau	Romania	Record high maximum temperature	32.7 C (90.9 F)	24 of 100 (Routine)
Landsburg	United States	Record daily precipitation	68.6 mm (2.7 in)	24 of 100 (Routine)
Snoqualmie Falls	United States	Record daily precipitation	46.7 mm (1.8 in)	24 of 100 (Routine)
Hillsdown	Canada	Record daily snowfall	7.6 cm (3.0 in)	23 of 100 (Routine)
Tranebjerg	Denmark	Record high minimum temperature	14.2 C (57.6 F)	23 of 100 (Routine)
Vishakhapatnam	India	Record daily precipitation	66.0 mm (2.6 in)	23 of 100 (Routine)
Represa	United States	Record low maximum temperature	18.3 C (64.9 F)	23 of 100 (Routine)
Bellefontaine	United States	Record daily precipitation	25.9 mm (1.0 in)	23 of 100 (Routine)
Longmire Rainier Nps	United States	Record daily precipitation	49.5 mm (1.9 in)	23 of 100 (Routine)
Newport	United States	Record daily precipitation	30.2 mm (1.2 in)	23 of 100 (Routine)
Lacombe Cda	Canada	Record daily snowfall	13.5 cm (5.3 in)	22 of 100 (Routine)
Banff	Canada	Record daily snowfall	7.6 cm (3.0 in)	22 of 100 (Routine)
Ellore	India	Record daily precipitation	37.6 mm (1.5 in)	22 of 100 (Routine)
Bhimunipatnam	India	Record daily precipitation	50.8 mm (2.0 in)	22 of 100 (Routine)
Holy Cross	United States	Record daily precipitation	30.5 mm (1.2 in)	22 of 100 (Routine)
Haliburton A	Canada	Record daily precipitation	41.1 mm (1.6 in)	21 of 100 (Routine)
Mc Connellsville Lk 7	United States	Record daily precipitation	27.9 mm (1.1 in)	21 of 100 (Routine)
Gatesville	United States	Record high minimum temperature	25.6 C (78.1 F)	21 of 100 (Routine)

Counts by Type and Timescale

406 records

Records set or tied on 20 September 1945 by type: Highest daily maximum 10, Lowest daily maximum 96, Highest daily minimum 44, Lowest daily minimum 28, Heaviest daily rainfall 219, Heaviest daily snowfall 8, Deepest snow cover 1.

Records on 20 September 1945 by type
Record type	Records
Highest daily maximum	10
Lowest daily maximum	96
Highest daily minimum	44
Lowest daily minimum	28
Heaviest daily rainfall	219
Heaviest daily snowfall	8
Deepest snow cover	1

Records on 20 September 1945 by timescale: all-time 0, monthly 9, daily 397.

How Much Records Were Beaten By

346 broken records

Margins by which the 346 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 123.5. Ties are not counted.

Top 20 by Significance

20 September 1945

Top 20 records on 20 September 1945 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1945	Armstrong, CA	monthly rain	40.1 mm (1.6 in)	18.8 mm (0.7 in)	14 years	57 of 100 (Notable)
20 September 1945	Jennings, US	daily rain	109.2 mm (4.3 in)	89.4 mm (3.5 in)	44 years	57 of 100 (Notable)
20 September 1945	Kunghari, IN	daily rain	143.8 mm (5.7 in)	123.5 mm (4.9 in)	34 years	54 of 100 (Notable)
20 September 1945	Jeypore, IN	daily rain	152.4 mm (6.0 in)	107.9 mm (4.2 in)	28 years	52 of 100 (Notable)
20 September 1945	Pithapuram, IN	daily rain	76.2 mm (3.0 in)	58.4 mm (2.3 in)	43 years	49 of 100 (Notable)
20 September 1945	Narsipatnam, IN	daily rain	98.6 mm (3.9 in)	66.1 mm (2.6 in)	34 years	49 of 100 (Notable)
20 September 1945	Tobolsk, RU	daily rain	28.7 mm (1.1 in)	21.1 mm (0.8 in)	10 years	49 of 100 (Notable)
20 September 1945	Polavaram, IN	daily rain	94.0 mm (3.7 in)	70.9 mm (2.8 in)	8 years	46 of 100 (Notable)
20 September 1945	Coeur D'Alene, US	daily rain	34.3 mm (1.4 in)	25.9 mm (1.0 in)	0 years	43 of 100 (Notable)
20 September 1945	Sandpoint Exp STN, US	daily rain	36.8 mm (1.4 in)	28.9 mm (1.1 in)	4 years	43 of 100 (Notable)
20 September 1945	Calgary Int'l A, CA	daily rain	30.5 mm (1.2 in)	24.7 mm (1.0 in)	4 years	41 of 100 (Notable)
20 September 1945	Oxford, GB	daily high min	16.1 C (61.0 F)	0.3 C (0.5 F)	107 years	40 of 100 (Notable)
20 September 1945	Hillsdown, CA	daily rain	27.2 mm (1.1 in)	17.0 mm (0.7 in)	8 years	39 of 100 (Notable)
20 September 1945	Strathmore, CA	daily rain	29.0 mm (1.1 in)	20.6 mm (0.8 in)	14 years	39 of 100 (Notable)
20 September 1945	Uralsk, KZ	monthly rain	25.9 mm (1.0 in)	8.0 mm (0.31 in)	10 years	39 of 100 (Notable)
20 September 1945	Peddapuram, IN	daily rain	77.5 mm (3.1 in)	38.9 mm (1.5 in)	43 years	36 of 100 (Notable)
20 September 1945	Priest Rvr Exp STN, US	daily rain	33.3 mm (1.3 in)	20.6 mm (0.8 in)	4 years	36 of 100 (Notable)
20 September 1945	Big Creek, CA	daily snowfall	6.4 cm (2.5 in)	6.4 cm (2.5 in)	51 years	32 of 100 (Routine)
20 September 1945	Colville, US	daily rain	25.7 mm (1.0 in)	16.3 mm (0.6 in)	4 years	32 of 100 (Routine)
20 September 1945	Malakapuram, IN	daily rain	60.5 mm (2.4 in)	27.5 mm (1.1 in)	44 years	31 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 1945

Records set or tied on this calendar date in each year from 1812 to 1945. 1945 had 406 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 1945-09-20: 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 20	301
20 to 40	33
40 to 60	4
60 to 80	5
80 to 100	1
100 to 120	1
120 to 140	1