Weather Records on 20 September 1975

527 weather records were set or tied worldwide on 20 September 1975. Highest significance: Poset, RU.

Key Facts for 20 September 1975

On 20 September 1975, 527 weather records were set or tied at long-record stations worldwide.
107 were record highs and 205 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 520 daily.
Poset set a daily record precipitation of 100.0 mm (3.9 in) on 20 September 1975.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 442 records.

Record Map

527 stations

527 station records on 20 September 1975 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Poset	Russia	Record daily precipitation	100.0 mm (3.9 in)	55 of 100 (Notable)
Birobidzhan	Russia	Record daily precipitation	59.9 mm (2.4 in)	53 of 100 (Notable)
Bridgetown Comparison	Australia	Record daily precipitation	31.6 mm (1.2 in)	45 of 100 (Notable)
Arteaga (Smn)	Mexico	Record daily precipitation	89.9 mm (3.5 in)	45 of 100 (Notable)
Rouxville (Pol)	South Africa	Record daily precipitation	25.5 mm (1.0 in)	44 of 100 (Notable)
Dardanelle	United States	Record daily precipitation	51.6 mm (2.0 in)	42 of 100 (Notable)
Corning	United States	Record daily precipitation	43.2 mm (1.7 in)	40 of 100 (Notable)
Ozark	United States	Record daily precipitation	58.2 mm (2.3 in)	40 of 100 (Notable)
Innsbruck	Austria	Record high minimum temperature	15.2 C (59.4 F)	38 of 100 (Notable)
Russellville	United States	Record daily precipitation	62.7 mm (2.5 in)	38 of 100 (Notable)
Shirley	United States	Record daily precipitation	77.5 mm (3.1 in)	37 of 100 (Notable)
Springfield Exp STN	United States	Record daily precipitation	56.4 mm (2.2 in)	36 of 100 (Notable)
Aldervale	Australia	Record daily precipitation	25.4 mm (1.0 in)	35 of 100 (Notable)
Newport	United States	Record daily precipitation	58.4 mm (2.3 in)	35 of 100 (Notable)
Greensburg	United States	Record daily precipitation	43.7 mm (1.7 in)	34 of 100 (Routine)
Detroit Lakes 1 NNE	United States	Record low maximum temperature	7.2 C (45.0 F)	34 of 100 (Routine)
Independence	United States	Record high minimum temperature	17.2 C (63.0 F)	33 of 100 (Routine)
Glenwood Spgs #2	United States	Record low minimum temperature	-6.1 C (21.0 F)	33 of 100 (Routine)
Booneville	United States	Record daily precipitation	66.5 mm (2.6 in)	33 of 100 (Routine)
Ft Benton	United States	Record low minimum temperature	-3.3 C (26.1 F)	33 of 100 (Routine)
Jamestown State Hosp	United States	Record low maximum temperature	8.3 C (46.9 F)	32 of 100 (Routine)
Gann Valley 4NW	United States	Record low maximum temperature	8.9 C (48.0 F)	32 of 100 (Routine)
Stephan 2 NW	United States	Record low maximum temperature	8.9 C (48.0 F)	32 of 100 (Routine)
Klintonel	Canada	Record low minimum temperature	-8.3 C (17.1 F)	31 of 100 (Routine)
Intake	South Africa	Record daily precipitation	45.0 mm (1.8 in)	31 of 100 (Routine)
Saguache	United States	Record low minimum temperature	-6.1 C (21.0 F)	31 of 100 (Routine)
Salem	United States	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Wishek	United States	Record low maximum temperature	8.3 C (46.9 F)	31 of 100 (Routine)
Clark	United States	Record low maximum temperature	8.3 C (46.9 F)	31 of 100 (Routine)
Manati 2 E	Puerto Rico [United States]	Record high minimum temperature	23.3 C (73.9 F)	30 of 100 (Routine)
Ekaterino-Nikolskoe	Russia	Record daily precipitation	37.3 mm (1.5 in)	30 of 100 (Routine)
Spicer	United States	Record low minimum temperature	-10.6 C (12.9 F)	30 of 100 (Routine)
Ellendale	United States	Record low maximum temperature	8.9 C (48.0 F)	30 of 100 (Routine)
Ipswich	United States	Record low maximum temperature	8.9 C (48.0 F)	30 of 100 (Routine)
Franklin Sewage Plt	United States	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Forest Grove	Australia	Record daily precipitation	29.2 mm (1.1 in)	29 of 100 (Routine)
McAlinden	Australia	Record daily precipitation	25.0 mm (1.0 in)	29 of 100 (Routine)
Indio Fire STN	United States	Record high minimum temperature	28.3 C (82.9 F)	29 of 100 (Routine)
Fullerton 1 ESE	United States	Record low maximum temperature	10.0 C (50.0 F)	29 of 100 (Routine)
Estacada 2 SE	United States	Record high minimum temperature	16.7 C (62.1 F)	29 of 100 (Routine)
Highmore	United States	Record low maximum temperature	8.9 C (48.0 F)	29 of 100 (Routine)
Miller	United States	Record low maximum temperature	8.9 C (48.0 F)	29 of 100 (Routine)
Watertown Rgnl AP	United States	Record low maximum temperature	9.4 C (48.9 F)	29 of 100 (Routine)
Zmeinogorsk	Russia	Record daily precipitation	36.1 mm (1.4 in)	28 of 100 (Routine)
Batesville L&D 1	United States	Record daily precipitation	60.7 mm (2.4 in)	28 of 100 (Routine)
Milan 1NW	United States	Record low maximum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Steele 4N	United States	Record low maximum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Eureka	United States	Record low maximum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Redfield	United States	Record low maximum temperature	8.9 C (48.0 F)	28 of 100 (Routine)
Saint Paul Is AP	United States	Record low maximum temperature	5.0 C (41.0 F)	28 of 100 (Routine)
Hvar	Croatia	Record high maximum temperature	29.1 C (84.4 F)	27 of 100 (Routine)
Edgeley 3WNW	United States	Record low maximum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Kennebec	United States	Record low maximum temperature	10.6 C (51.1 F)	27 of 100 (Routine)
St George	United States	Record high minimum temperature	18.9 C (66.0 F)	27 of 100 (Routine)
Bowelling	Australia	Record daily precipitation	28.0 mm (1.1 in)	26 of 100 (Routine)
Helvecia (Efbm)	Brazil	Record daily precipitation	33.6 mm (1.3 in)	26 of 100 (Routine)
Kisinev	Moldova	Record high minimum temperature	15.9 C (60.6 F)	26 of 100 (Routine)
San Francisco Tlalcilalcalpan	Mexico	Record low minimum temperature	0.6 C (33.1 F)	26 of 100 (Routine)
Clinton	United States	Record daily precipitation	71.1 mm (2.8 in)	26 of 100 (Routine)
Napoleon	United States	Record low maximum temperature	8.3 C (46.9 F)	26 of 100 (Routine)

Counts by Type and Timescale

527 records

Records set or tied on 20 September 1975 by type: Highest daily maximum 27, Lowest daily maximum 127, Highest daily minimum 80, Lowest daily minimum 78, Heaviest daily rainfall 215.

Records on 20 September 1975 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	127
Highest daily minimum	80
Lowest daily minimum	78
Heaviest daily rainfall	215
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1975 by timescale: all-time 0, monthly 7, daily 520.

How Much Records Were Beaten By

421 broken records

Margins by which the 421 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 66.7. Ties are not counted.

Top 20 by Significance

20 September 1975

Top 20 records on 20 September 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1975	Poset, RU	daily rain	100.0 mm (3.9 in)	66.7 mm (2.6 in)	36 years	55 of 100 (Notable)
20 September 1975	Birobidzhan, RU	daily rain	59.9 mm (2.4 in)	42.8 mm (1.7 in)	32 years	53 of 100 (Notable)
20 September 1975	Bridgetown Comparison, AU	daily rain	31.6 mm (1.2 in)	11.3 mm (0.4 in)	60 years	45 of 100 (Notable)
20 September 1975	Arteaga (Smn), MX	daily rain	89.9 mm (3.5 in)	62.0 mm (2.4 in)	8 years	45 of 100 (Notable)
20 September 1975	Rouxville (Pol), ZA	daily rain	25.5 mm (1.0 in)	20.4 mm (0.8 in)	66 years	44 of 100 (Notable)
20 September 1975	Dardanelle, US	daily rain	51.6 mm (2.0 in)	28.0 mm (1.1 in)	52 years	42 of 100 (Notable)
20 September 1975	Corning, US	daily rain	43.2 mm (1.7 in)	16.8 mm (0.7 in)	76 years	40 of 100 (Notable)
20 September 1975	Ozark, US	daily rain	58.2 mm (2.3 in)	18.8 mm (0.7 in)	70 years	40 of 100 (Notable)
20 September 1975	Innsbruck, AT	daily high min	15.2 C (59.4 F)	1.2 C (2.2 F)	89 years	38 of 100 (Notable)
20 September 1975	Russellville, US	daily rain	62.7 mm (2.5 in)	29.7 mm (1.2 in)	38 years	38 of 100 (Notable)
20 September 1975	Shirley, US	daily rain	77.5 mm (3.1 in)	62.5 mm (2.5 in)	16 years	37 of 100 (Notable)
20 September 1975	Springfield Exp STN, US	daily rain	56.4 mm (2.2 in)	34.8 mm (1.4 in)	20 years	36 of 100 (Notable)
20 September 1975	Aldervale, AU	daily rain	25.4 mm (1.0 in)	6.6 mm (0.26 in)	60 years	35 of 100 (Notable)
20 September 1975	Newport, US	daily rain	58.4 mm (2.3 in)	7.3 mm (0.29 in)	74 years	35 of 100 (Notable)
20 September 1975	Greensburg, US	daily rain	43.7 mm (1.7 in)	8.9 mm (0.35 in)	69 years	34 of 100 (Routine)
20 September 1975	Detroit Lakes 1 NNE, US	daily low max	7.2 C (45.0 F)	2.8 C (5.0 F)	74 years	34 of 100 (Routine)
20 September 1975	Independence, US	daily high min	17.2 C (63.0 F)	1.1 C (2.0 F)	75 years	33 of 100 (Routine)
20 September 1975	Glenwood Spgs #2, US	daily low min	-6.1 C (21.0 F)	2.8 C (5.0 F)	61 years	33 of 100 (Routine)
20 September 1975	Booneville, US	daily rain	66.5 mm (2.6 in)	22.0 mm (0.9 in)	42 years	33 of 100 (Routine)
20 September 1975	Ft Benton, US	daily low min	-3.3 C (26.1 F)	1.1 C (2.0 F)	79 years	33 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 1975

Records set or tied on this calendar date in each year from 1812 to 1975. 1975 had 527 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 1975-09-20: 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	369
10 to 20	35
20 to 30	11
30 to 40	2
40 to 50	1
50 to 60	0
60 to 70	3