Weather Records on 20 September 1957

514 weather records were set or tied worldwide on 20 September 1957. Highest significance: Port Blair, IN.

Key Facts for 20 September 1957

On 20 September 1957, 514 weather records were set or tied at long-record stations worldwide.
135 were record highs and 242 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 6 monthly and 507 daily.
Port Blair set a monthly record daily precipitation of 251.2 mm (9.9 in) on 20 September 1957.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 442 records.

Record Map

514 stations

514 station records on 20 September 1957 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1957: highest significance records shown on the map
Station	Country	Type	Value	Significance
Port Blair	India	Record daily precipitation	251.2 mm (9.9 in)	60 of 100 (Major)
Berne Wwtp	United States	Record daily precipitation	124.0 mm (4.9 in)	57 of 100 (Notable)
Salamonia	United States	Record daily precipitation	71.9 mm (2.8 in)	55 of 100 (Notable)
Midland Water Pollution Contro	Canada	Record daily precipitation	40.6 mm (1.6 in)	54 of 100 (Notable)
Kenton	United States	Record daily precipitation	78.2 mm (3.1 in)	53 of 100 (Notable)
Wooster 2 SE	United States	Record daily precipitation	89.2 mm (3.5 in)	51 of 100 (Notable)
Saginaw Mbs Intl AP	United States	Record daily precipitation	65.0 mm (2.6 in)	49 of 100 (Notable)
Bucyrus	United States	Record daily precipitation	75.4 mm (3.0 in)	48 of 100 (Notable)
Upper Sandusky	United States	Record daily precipitation	83.1 mm (3.3 in)	48 of 100 (Notable)
Ellsworth	United States	Record daily precipitation	55.9 mm (2.2 in)	47 of 100 (Notable)
Lima Wwtp	United States	Record daily precipitation	60.2 mm (2.4 in)	47 of 100 (Notable)
Frankfort Disposal	United States	Record daily precipitation	77.5 mm (3.1 in)	46 of 100 (Notable)
Bluffton Wtr Wks	United States	Record daily precipitation	82.3 mm (3.2 in)	44 of 100 (Notable)
Mansfield 5 W	United States	Record daily precipitation	101.1 mm (4.0 in)	42 of 100 (Notable)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record high minimum temperature	7.8 C (46.0 F)	41 of 100 (Notable)
Findlay Wpcc	United States	Record daily precipitation	52.6 mm (2.1 in)	41 of 100 (Notable)
Cottonwood Falls	United States	Record daily precipitation	88.9 mm (3.5 in)	40 of 100 (Notable)
Tiffin	United States	Record daily precipitation	49.8 mm (2.0 in)	40 of 100 (Notable)
Van Wert 1 S	United States	Record daily precipitation	52.1 mm (2.1 in)	40 of 100 (Notable)
Collingwood	Canada	Record daily precipitation	35.6 mm (1.4 in)	39 of 100 (Notable)
Harbor Beach 1 SSE	United States	Record daily precipitation	34.3 mm (1.4 in)	37 of 100 (Notable)
Canfield 1 S	United States	Record daily precipitation	48.8 mm (1.9 in)	35 of 100 (Notable)
Vasteras-Hasslo	Sweden	Record low maximum temperature	8.2 C (46.8 F)	34 of 100 (Routine)
Alma	United States	Record daily precipitation	47.5 mm (1.9 in)	34 of 100 (Routine)
Ixmiquilpan (Smn)	Mexico	Record daily precipitation	33.8 mm (1.3 in)	33 of 100 (Routine)
Holly	United States	Record low maximum temperature	13.3 C (55.9 F)	33 of 100 (Routine)
Lamar	United States	Record low maximum temperature	13.9 C (57.0 F)	33 of 100 (Routine)
Ashland	United States	Record daily precipitation	41.4 mm (1.6 in)	33 of 100 (Routine)
Leavenworth	United States	Record daily precipitation	71.1 mm (2.8 in)	32 of 100 (Routine)
Yates Ctr	United States	Record daily precipitation	78.2 mm (3.1 in)	32 of 100 (Routine)
Gavle	Sweden	Record low maximum temperature	7.1 C (44.8 F)	31 of 100 (Routine)
Bradenton Exp STN	United States	Record daily precipitation	69.9 mm (2.8 in)	31 of 100 (Routine)
Rio Grande City	United States	Record high minimum temperature	26.7 C (80.1 F)	31 of 100 (Routine)
Paarl (Tnk)	South Africa	Record daily precipitation	25.5 mm (1.0 in)	30 of 100 (Routine)
Winkelman 6 S	United States	Record low minimum temperature	7.8 C (46.0 F)	30 of 100 (Routine)
Anderson 1 N	United States	Record daily precipitation	49.0 mm (1.9 in)	30 of 100 (Routine)
Coshocton Wpc Plt	United States	Record daily precipitation	35.6 mm (1.4 in)	30 of 100 (Routine)
Dennison Wtr Wks	United States	Record daily precipitation	53.1 mm (2.1 in)	30 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Delphi 2 N	United States	Record daily precipitation	28.7 mm (1.1 in)	29 of 100 (Routine)
Columbus 4 ESE	United States	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Perkins	Canada	Record daily precipitation	67.1 mm (2.6 in)	28 of 100 (Routine)
Jetmore	United States	Record low maximum temperature	13.3 C (55.9 F)	28 of 100 (Routine)
Scott City	United States	Record low maximum temperature	13.9 C (57.0 F)	28 of 100 (Routine)
Alma	United States	Record low maximum temperature	12.2 C (54.0 F)	28 of 100 (Routine)
Carrizo Springs 3S	United States	Record high minimum temperature	26.7 C (80.1 F)	28 of 100 (Routine)
New Cumberland L/D	United States	Record daily precipitation	56.1 mm (2.2 in)	28 of 100 (Routine)
Toronto	Canada	Record high minimum temperature	18.9 C (66.0 F)	27 of 100 (Routine)
Achinsk	Russia	Record low maximum temperature	3.6 C (38.5 F)	27 of 100 (Routine)
Warrenton	United States	Record daily precipitation	57.2 mm (2.3 in)	27 of 100 (Routine)
Madison Sewage Plt	United States	Record high minimum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
Franklin	United States	Record low maximum temperature	12.2 C (54.0 F)	27 of 100 (Routine)
Brownsville	United States	Record high minimum temperature	26.1 C (79.0 F)	27 of 100 (Routine)
Turkestan	Kazakhstan	Record high minimum temperature	19.5 C (67.1 F)	26 of 100 (Routine)
Coldwater	United States	Record low maximum temperature	16.7 C (62.1 F)	26 of 100 (Routine)
Medicine Lodge	United States	Record daily precipitation	38.1 mm (1.5 in)	26 of 100 (Routine)
Oakley 4W	United States	Record low maximum temperature	15.0 C (59.0 F)	26 of 100 (Routine)
Hyannis	United States	Record low minimum temperature	5.6 C (42.1 F)	26 of 100 (Routine)
Ft Robinson	United States	Record low maximum temperature	10.0 C (50.0 F)	26 of 100 (Routine)
Los Lunas	United States	Record low minimum temperature	3.3 C (37.9 F)	26 of 100 (Routine)

Counts by Type and Timescale

514 records

Records set or tied on 20 September 1957 by type: Highest daily maximum 20, Lowest daily maximum 184, Highest daily minimum 115, Lowest daily minimum 58, Heaviest daily rainfall 134, Heaviest daily snowfall 3.

Records on 20 September 1957 by type
Record type	Records
Highest daily maximum	20
Lowest daily maximum	184
Highest daily minimum	115
Lowest daily minimum	58
Heaviest daily rainfall	134
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 20 September 1957 by timescale: all-time 1, monthly 6, daily 507.

How Much Records Were Beaten By

395 broken records

Margins by which the 395 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 73.1. Ties are not counted.

Top 20 by Significance

20 September 1957

Top 20 records on 20 September 1957 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1957	Port Blair, IN	monthly rain	251.2 mm (9.9 in)	73.1 mm (2.9 in)	53 years	60 of 100 (Major)
20 September 1957	Berne Wwtp, US	all-time rain	124.0 mm (4.9 in)	34.8 mm (1.4 in)	15 years	57 of 100 (Notable)
20 September 1957	Salamonia, US	daily rain	71.9 mm (2.8 in)	50.8 mm (2.0 in)	34 years	55 of 100 (Notable)
20 September 1957	Midland Water Pollution Contro, CA	daily rain	40.6 mm (1.6 in)	23.3 mm (0.9 in)	56 years	54 of 100 (Notable)
20 September 1957	Kenton, US	daily rain	78.2 mm (3.1 in)	65.2 mm (2.6 in)	24 years	53 of 100 (Notable)
20 September 1957	Wooster 2 SE, US	monthly rain	89.2 mm (3.5 in)	27.2 mm (1.1 in)	36 years	51 of 100 (Notable)
20 September 1957	Saginaw Mbs Intl AP, US	daily rain	65.0 mm (2.6 in)	49.8 mm (2.0 in)	12 years	49 of 100 (Notable)
20 September 1957	Bucyrus, US	daily rain	75.4 mm (3.0 in)	55.1 mm (2.2 in)	8 years	48 of 100 (Notable)
20 September 1957	Upper Sandusky, US	daily rain	83.1 mm (3.3 in)	62.5 mm (2.5 in)	8 years	48 of 100 (Notable)
20 September 1957	Ellsworth, US	daily rain	55.9 mm (2.2 in)	25.4 mm (1.0 in)	62 years	47 of 100 (Notable)
20 September 1957	Lima Wwtp, US	daily rain	60.2 mm (2.4 in)	39.9 mm (1.6 in)	31 years	47 of 100 (Notable)
20 September 1957	Frankfort Disposal, US	daily rain	77.5 mm (3.1 in)	58.2 mm (2.3 in)	8 years	46 of 100 (Notable)
20 September 1957	Bluffton Wtr Wks, US	daily rain	82.3 mm (3.2 in)	50.3 mm (2.0 in)	4 years	44 of 100 (Notable)
20 September 1957	Mansfield 5 W, US	monthly rain	101.1 mm (4.0 in)	20.6 mm (0.8 in)	32 years	42 of 100 (Notable)
20 September 1957	Ilulissat (Jakobshavn), GL	daily high min	7.8 C (46.0 F)	3.8 C (6.8 F)	73 years	41 of 100 (Notable)
20 September 1957	Findlay Wpcc, US	daily rain	52.6 mm (2.1 in)	30.2 mm (1.2 in)	34 years	41 of 100 (Notable)
20 September 1957	Cottonwood Falls, US	daily rain	88.9 mm (3.5 in)	56.9 mm (2.2 in)	24 years	40 of 100 (Notable)
20 September 1957	Tiffin, US	daily rain	49.8 mm (2.0 in)	28.0 mm (1.1 in)	34 years	40 of 100 (Notable)
20 September 1957	Van Wert 1 S, US	daily rain	52.1 mm (2.1 in)	35.6 mm (1.4 in)	8 years	40 of 100 (Notable)
20 September 1957	Collingwood, CA	daily rain	35.6 mm (1.4 in)	18.3 mm (0.7 in)	38 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 1957

Records set or tied on this calendar date in each year from 1812 to 1957. 1957 had 514 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 1957-09-20: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 10	335
10 to 20	27
20 to 30	15
30 to 40	8
40 to 50	2
50 to 60	5
60 to 70	2
70 to 80	1