Weather Records on 20 September 1947

460 weather records were set or tied worldwide on 20 September 1947. Highest significance: Amite, US.

Key Facts for 20 September 1947

On 20 September 1947, 460 weather records were set or tied at long-record stations worldwide.
230 were record highs and 63 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 18 monthly and 441 daily.
Amite set a monthly record daily precipitation of 137.9 mm (5.4 in) on 20 September 1947.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 442 records.

Record Map

460 stations

460 station records on 20 September 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Amite	United States	Record daily precipitation	137.9 mm (5.4 in)	61 of 100 (Major)
Robeline	United States	Record daily precipitation	101.6 mm (4.0 in)	56 of 100 (Notable)
Jena Sternwarte	Germany	Record high maximum temperature	34.1 C (93.4 F)	53 of 100 (Notable)
Lakefield	Canada	Record daily precipitation	50.8 mm (2.0 in)	51 of 100 (Notable)
Fort Macleod	Canada	Record daily precipitation	37.6 mm (1.5 in)	49 of 100 (Notable)
Praha-Klementinum	Czech Republic	Record high maximum temperature	31.5 C (88.7 F)	48 of 100 (Notable)
Monticello	United States	Record daily precipitation	95.3 mm (3.8 in)	48 of 100 (Notable)
Pet Jorhat	India	Record daily precipitation	91.4 mm (3.6 in)	46 of 100 (Notable)
Columbia	United States	Record daily precipitation	184.2 mm (7.3 in)	45 of 100 (Notable)
Putbus	Germany	Record high maximum temperature	27.0 C (80.6 F)	44 of 100 (Notable)
Perseoni	India	Record daily precipitation	106.4 mm (4.2 in)	44 of 100 (Notable)
Merrill	United States	Record daily precipitation	89.2 mm (3.5 in)	43 of 100 (Notable)
Lumding	India	Record daily precipitation	108.0 mm (4.3 in)	42 of 100 (Notable)
Golaghat	India	Record daily precipitation	74.4 mm (2.9 in)	42 of 100 (Notable)
Plain Dealing	United States	Record daily precipitation	70.1 mm (2.8 in)	42 of 100 (Notable)
Uccle	Belgium	Record high minimum temperature	16.1 C (61.0 F)	41 of 100 (Notable)
Willard 4 SW	United States	Record daily precipitation	84.6 mm (3.3 in)	41 of 100 (Notable)
Bremen-Seefahrtschule	Germany	Record high maximum temperature	33.3 C (91.9 F)	39 of 100 (Notable)
Regensburg	Germany	Record high maximum temperature	31.9 C (89.4 F)	39 of 100 (Notable)
Chemnitz	Germany	Record high maximum temperature	30.9 C (87.6 F)	39 of 100 (Notable)
Putbus	Germany	Record high minimum temperature	17.3 C (63.1 F)	38 of 100 (Notable)
Marshall	United States	Record daily precipitation	48.3 mm (1.9 in)	38 of 100 (Notable)
Mt Ida 3 SE	United States	Record daily precipitation	53.3 mm (2.1 in)	37 of 100 (Notable)
Bee Branch	United States	Record daily precipitation	50.8 mm (2.0 in)	36 of 100 (Notable)
Geilo	Norway	Record daily precipitation	29.0 mm (1.1 in)	35 of 100 (Notable)
Minden	United States	Record daily precipitation	52.3 mm (2.1 in)	35 of 100 (Notable)
Arkansas City	United States	Record daily precipitation	101.9 mm (4.0 in)	34 of 100 (Routine)
Pearl River	United States	Record daily precipitation	115.6 mm (4.6 in)	34 of 100 (Routine)
Utica	United States	Record daily precipitation	141.0 mm (5.6 in)	34 of 100 (Routine)
Vestervig	Denmark	Record high maximum temperature	28.4 C (83.1 F)	33 of 100 (Routine)
Husum	Germany	Record high maximum temperature	29.9 C (85.8 F)	33 of 100 (Routine)
Dumas	United States	Record daily precipitation	82.6 mm (3.3 in)	33 of 100 (Routine)
Redding Fire STN 2	United States	Record low minimum temperature	3.9 C (39.0 F)	33 of 100 (Routine)
Calhoun 2 N	United States	Record daily precipitation	49.5 mm (1.9 in)	33 of 100 (Routine)
Hattiesburg 5SW	United States	Record daily precipitation	123.7 mm (4.9 in)	33 of 100 (Routine)
Leakesville 6 WSW	United States	Record daily precipitation	82.0 mm (3.2 in)	33 of 100 (Routine)
Emerald Post Office	Australia	Record daily precipitation	38.1 mm (1.5 in)	32 of 100 (Routine)
Chemnitz	Germany	Record high minimum temperature	16.2 C (61.2 F)	32 of 100 (Routine)
Clausthal-Zellerfeld	Germany	Record high minimum temperature	16.6 C (61.9 F)	32 of 100 (Routine)
New Braunfels	United States	Record high maximum temperature	40.0 C (104.0 F)	32 of 100 (Routine)
Chanute Martin Johnson AP	United States	Record daily precipitation	102.1 mm (4.0 in)	32 of 100 (Routine)
Berlin-Dahlem	Germany	Record high minimum temperature	16.5 C (61.7 F)	31 of 100 (Routine)
Hamburg Bergedorf	Germany	Record high maximum temperature	34.9 C (94.8 F)	31 of 100 (Routine)
Hamburg Fuhlsbuettel	Germany	Record high maximum temperature	31.9 C (89.4 F)	31 of 100 (Routine)
Aachen	Germany	Record high minimum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Spring Hill	United States	Record daily precipitation	91.2 mm (3.6 in)	31 of 100 (Routine)
Koebenhavn: Landbohojskolen-1	Denmark	Record high maximum temperature	23.3 C (73.9 F)	29 of 100 (Routine)
Leipzig-Holzhausen	Germany	Record high maximum temperature	33.5 C (92.3 F)	29 of 100 (Routine)
Braunschweig (T.H.)	Germany	Record high maximum temperature	33.5 C (92.3 F)	29 of 100 (Routine)
Nigriting	India	Record daily precipitation	68.3 mm (2.7 in)	29 of 100 (Routine)
Ruston la Tech	United States	Record daily precipitation	49.0 mm (1.9 in)	29 of 100 (Routine)
Berlin-Dahlem	Germany	Record high maximum temperature	32.6 C (90.7 F)	28 of 100 (Routine)
Lubeck-Werft	Germany	Record high maximum temperature	31.6 C (88.9 F)	28 of 100 (Routine)
St Joseph 3 N	United States	Record daily precipitation	39.4 mm (1.6 in)	28 of 100 (Routine)
Raymondville	United States	Record high minimum temperature	30.0 C (86.0 F)	28 of 100 (Routine)
Hillsboro	United States	Record high minimum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
Innsbruck	Austria	Record high maximum temperature	30.7 C (87.3 F)	27 of 100 (Routine)
Milesovka	Czech Republic	Record high maximum temperature	29.0 C (84.2 F)	27 of 100 (Routine)
Cottbus	Germany	Record high maximum temperature	33.4 C (92.1 F)	27 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	28.3 C (82.9 F)	27 of 100 (Routine)

Counts by Type and Timescale

460 records

Records set or tied on 20 September 1947 by type: Highest daily maximum 96, Lowest daily maximum 15, Highest daily minimum 134, Lowest daily minimum 48, Heaviest daily rainfall 166, Heaviest daily snowfall 1.

Records on 20 September 1947 by type
Record type	Records
Highest daily maximum	96
Lowest daily maximum	15
Highest daily minimum	134
Lowest daily minimum	48
Heaviest daily rainfall	166
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 20 September 1947 by timescale: all-time 1, monthly 18, daily 441.

How Much Records Were Beaten By

371 broken records

Margins by which the 371 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 143.6. Ties are not counted.

Top 20 by Significance

20 September 1947

Top 20 records on 20 September 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1947	Amite, US	monthly rain	137.9 mm (5.4 in)	48.7 mm (1.9 in)	51 years	61 of 100 (Major)
20 September 1947	Robeline, US	daily rain	101.6 mm (4.0 in)	94.5 mm (3.7 in)	38 years	56 of 100 (Notable)
20 September 1947	Jena Sternwarte, DE	daily high max	34.1 C (93.4 F)	6.0 C (10.8 F)	112 years	53 of 100 (Notable)
20 September 1947	Lakefield, CA	daily rain	50.8 mm (2.0 in)	29.5 mm (1.2 in)	47 years	51 of 100 (Notable)
20 September 1947	Fort Macleod, CA	daily rain	37.6 mm (1.5 in)	31.5 mm (1.2 in)	6 years	49 of 100 (Notable)
20 September 1947	Praha-Klementinum, CZ	daily high max	31.5 C (88.7 F)	3.3 C (5.9 F)	145 years	48 of 100 (Notable)
20 September 1947	Monticello, US	daily rain	95.3 mm (3.8 in)	66.6 mm (2.6 in)	14 years	48 of 100 (Notable)
20 September 1947	Pet Jorhat, IN	daily rain	91.4 mm (3.6 in)	70.8 mm (2.8 in)	18 years	46 of 100 (Notable)
20 September 1947	Columbia, US	daily rain	184.2 mm (7.3 in)	143.6 mm (5.7 in)	4 years	45 of 100 (Notable)
20 September 1947	Putbus, DE	daily high max	27.0 C (80.6 F)	4.5 C (8.1 F)	71 years	44 of 100 (Notable)
20 September 1947	Perseoni, IN	daily rain	106.4 mm (4.2 in)	84.6 mm (3.3 in)	4 years	44 of 100 (Notable)
20 September 1947	Merrill, US	daily rain	89.2 mm (3.5 in)	58.7 mm (2.3 in)	36 years	43 of 100 (Notable)
20 September 1947	Lumding, IN	daily rain	108.0 mm (4.3 in)	63.0 mm (2.5 in)	8 years	42 of 100 (Notable)
20 September 1947	Golaghat, IN	daily rain	74.4 mm (2.9 in)	47.0 mm (1.9 in)	28 years	42 of 100 (Notable)
20 September 1947	Plain Dealing, US	daily rain	70.1 mm (2.8 in)	50.3 mm (2.0 in)	28 years	42 of 100 (Notable)
20 September 1947	Uccle, BE	daily high min	16.1 C (61.0 F)	0.5 C (0.9 F)	112 years	41 of 100 (Notable)
20 September 1947	Willard 4 SW, US	daily rain	84.6 mm (3.3 in)	54.1 mm (2.1 in)	36 years	41 of 100 (Notable)
20 September 1947	Bremen-Seefahrtschule, DE	daily high max	33.3 C (91.9 F)	9.7 C (17.5 F)	22 years	39 of 100 (Notable)
20 September 1947	Regensburg, DE	daily high max	31.9 C (89.4 F)	6.8 C (12.2 F)	62 years	39 of 100 (Notable)
20 September 1947	Chemnitz, DE	daily high max	30.9 C (87.6 F)	8.2 C (14.8 F)	54 years	39 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

1812 to 1947

Records set or tied on this calendar date in each year from 1812 to 1947. 1947 had 460 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 1947-09-20: 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	329
20 to 40	24
40 to 60	11
60 to 80	3
80 to 100	2
100 to 120	1
120 to 140	0
140 to 160	1