Weather Records on 20 September 1971

884 weather records were set or tied worldwide on 20 September 1971. Highest significance: Parry Sound, CA.

Key Facts for 20 September 1971

On 20 September 1971, 884 weather records were set or tied at long-record stations worldwide.
80 were record highs and 578 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 40 monthly and 844 daily.
Parry Sound set a daily record precipitation of 54.6 mm (2.1 in) on 20 September 1971.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 439 records.

Record Map

884 stations

884 station records on 20 September 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Parry Sound	Canada	Record daily precipitation	54.6 mm (2.1 in)	58 of 100 (Notable)
Vevay	United States	Record daily precipitation	42.7 mm (1.7 in)	53 of 100 (Notable)
Marathon	United States	Record low maximum temperature	11.7 C (53.1 F)	51 of 100 (Notable)
Veselyi Podil	Ukraine	Record daily precipitation	54.8 mm (2.2 in)	49 of 100 (Notable)
Rio Grande City	United States	Record low maximum temperature	18.3 C (64.9 F)	49 of 100 (Notable)
Port Hope	Canada	Record daily precipitation	32.3 mm (1.3 in)	48 of 100 (Notable)
Imeny_T.G.Shevchenko	Ukraine	Record daily precipitation	51.8 mm (2.0 in)	48 of 100 (Notable)
Sonora	United States	Record low minimum temperature	3.9 C (39.0 F)	47 of 100 (Notable)
Mt Ida 3 SE	United States	Record low maximum temperature	13.9 C (57.0 F)	46 of 100 (Notable)
Pericos	Mexico	Record daily precipitation	66.8 mm (2.6 in)	45 of 100 (Notable)
Perpignan	France	Record daily precipitation	89.3 mm (3.5 in)	44 of 100 (Notable)
Chadron 3SW	United States	Record daily precipitation	47.8 mm (1.9 in)	43 of 100 (Notable)
Tweed	Canada	Record daily precipitation	40.9 mm (1.6 in)	42 of 100 (Notable)
Mistassini Post	Canada	Record daily precipitation	39.9 mm (1.6 in)	42 of 100 (Notable)
Griffiss AFB	United States	Record daily precipitation	36.6 mm (1.4 in)	42 of 100 (Notable)
Gatesville	United States	Record low maximum temperature	17.2 C (63.0 F)	41 of 100 (Notable)
Bourke Post Office	Australia	Record high minimum temperature	18.9 C (66.0 F)	40 of 100 (Notable)
Scotia	Canada	Record daily precipitation	35.6 mm (1.4 in)	40 of 100 (Notable)
Port Stanley	Canada	Record daily precipitation	25.4 mm (1.0 in)	40 of 100 (Notable)
Carlsbad	United States	Record low maximum temperature	14.4 C (57.9 F)	40 of 100 (Notable)
Eagle Pass 3N	United States	Record low maximum temperature	14.4 C (57.9 F)	40 of 100 (Notable)
Temple	United States	Record low minimum temperature	9.4 C (48.9 F)	40 of 100 (Notable)
Victoria Gonzales Hts	Canada	Record high minimum temperature	14.4 C (57.9 F)	39 of 100 (Notable)
Gainesville	United States	Record low maximum temperature	13.9 C (57.0 F)	39 of 100 (Notable)
Menard	United States	Record low minimum temperature	3.3 C (37.9 F)	39 of 100 (Notable)
Tahoka	United States	Record low minimum temperature	3.9 C (39.0 F)	39 of 100 (Notable)
Kiev	Ukraine	Record daily precipitation	28.3 mm (1.1 in)	38 of 100 (Notable)
Lamar 7N	United States	Record low maximum temperature	11.7 C (53.1 F)	38 of 100 (Notable)
Sedalia Wtp	United States	Record low maximum temperature	10.0 C (50.0 F)	38 of 100 (Notable)
Red Lodge	United States	Record daily snowfall	20.3 cm (8.0 in)	38 of 100 (Notable)
Valmora	United States	Record low minimum temperature	-4.4 C (24.1 F)	38 of 100 (Notable)
Alice	United States	Record low maximum temperature	18.3 C (64.9 F)	38 of 100 (Notable)
Brownwood 2NE	United States	Record low maximum temperature	12.2 C (54.0 F)	38 of 100 (Notable)
Lucknow	Canada	Record daily precipitation	41.1 mm (1.6 in)	37 of 100 (Notable)
Zolotonosha	Ukraine	Record daily precipitation	53.6 mm (2.1 in)	37 of 100 (Notable)
Victor	United States	Record low maximum temperature	8.9 C (48.0 F)	37 of 100 (Notable)
Burnet	United States	Record low minimum temperature	6.1 C (43.0 F)	37 of 100 (Notable)
Greenville Kgvl Radio	United States	Record low minimum temperature	6.7 C (44.1 F)	37 of 100 (Notable)
Henrietta	United States	Record low maximum temperature	12.2 C (54.0 F)	37 of 100 (Notable)
Kaufman 3 SE	United States	Record low minimum temperature	8.9 C (48.0 F)	37 of 100 (Notable)
Houston William P Hobby AP	United States	Record low maximum temperature	20.6 C (69.1 F)	37 of 100 (Notable)
Roswell Muni AP	United States	Record low minimum temperature	0.6 C (33.1 F)	37 of 100 (Notable)
Graham	United States	Record low maximum temperature	12.2 C (54.0 F)	36 of 100 (Notable)
Kerrville	United States	Record low maximum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Liberty	United States	Record low maximum temperature	22.2 C (72.0 F)	36 of 100 (Notable)
Sherman	United States	Record low minimum temperature	6.7 C (44.1 F)	36 of 100 (Notable)
Mount Forest	Canada	Record daily precipitation	27.4 mm (1.1 in)	35 of 100 (Notable)
Trenton A	Canada	Record daily precipitation	28.2 mm (1.1 in)	35 of 100 (Notable)
Fruita	United States	Record low minimum temperature	-3.9 C (25.0 F)	35 of 100 (Notable)
Estancia 4N	United States	Record low minimum temperature	-3.9 C (25.0 F)	35 of 100 (Notable)
Jornada Exp Range	United States	Record low maximum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Taos	United States	Record low minimum temperature	-2.2 C (28.0 F)	35 of 100 (Notable)
Highmarket 2W	United States	Record daily precipitation	68.8 mm (2.7 in)	35 of 100 (Notable)
Meeker 5 W	United States	Record low maximum temperature	12.8 C (55.0 F)	35 of 100 (Notable)
Stillwater 2 W	United States	Record low maximum temperature	14.4 C (57.9 F)	35 of 100 (Notable)
Albany	United States	Record low maximum temperature	12.2 C (54.0 F)	35 of 100 (Notable)
Dilley	United States	Record low maximum temperature	18.9 C (66.0 F)	35 of 100 (Notable)
Dublin 2SE	United States	Record low maximum temperature	12.8 C (55.0 F)	35 of 100 (Notable)
Eastland	United States	Record low maximum temperature	14.4 C (57.9 F)	35 of 100 (Notable)
Gatesville	United States	Record low minimum temperature	6.1 C (43.0 F)	35 of 100 (Notable)

Counts by Type and Timescale

884 records

Records set or tied on 20 September 1971 by type: Highest daily maximum 42, Lowest daily maximum 249, Highest daily minimum 38, Lowest daily minimum 329, Heaviest daily rainfall 223, Heaviest daily snowfall 2, Deepest snow cover 1.

Records on 20 September 1971 by type
Record type	Records
Highest daily maximum	42
Lowest daily maximum	249
Highest daily minimum	38
Lowest daily minimum	329
Heaviest daily rainfall	223
Heaviest daily snowfall	2
Deepest snow cover	1

Records on 20 September 1971 by timescale: all-time 0, monthly 40, daily 844.

How Much Records Were Beaten By

752 broken records

Margins by which the 752 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 139.0. Ties are not counted.

Top 20 by Significance

20 September 1971

Top 20 records on 20 September 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1971	Parry Sound, CA	daily rain	54.6 mm (2.1 in)	35.5 mm (1.4 in)	40 years	58 of 100 (Notable)
20 September 1971	Vevay, US	daily rain	42.7 mm (1.7 in)	36.3 mm (1.4 in)	53 years	53 of 100 (Notable)
20 September 1971	Marathon, US	daily low max	11.7 C (53.1 F)	11.1 C (20.0 F)	57 years	51 of 100 (Notable)
20 September 1971	Veselyi Podil, UA	daily rain	54.8 mm (2.2 in)	33.2 mm (1.3 in)	20 years	49 of 100 (Notable)
20 September 1971	Rio Grande City, US	daily low max	18.3 C (64.9 F)	7.8 C (14.0 F)	69 years	49 of 100 (Notable)
20 September 1971	Port Hope, CA	daily rain	32.3 mm (1.3 in)	22.1 mm (0.9 in)	70 years	48 of 100 (Notable)
20 September 1971	Imeny_T.G.Shevchenko, UA	daily rain	51.8 mm (2.0 in)	27.8 mm (1.1 in)	18 years	48 of 100 (Notable)
20 September 1971	Sonora, US	daily low min	3.9 C (39.0 F)	8.3 C (14.9 F)	62 years	47 of 100 (Notable)
20 September 1971	Mt Ida 3 SE, US	monthly low max	13.9 C (57.0 F)	2.8 C (5.0 F)	75 years	46 of 100 (Notable)
20 September 1971	Pericos, MX	daily rain	66.8 mm (2.6 in)	48.0 mm (1.9 in)	9 years	45 of 100 (Notable)
20 September 1971	Perpignan, FR	daily rain	89.3 mm (3.5 in)	33.2 mm (1.3 in)	69 years	44 of 100 (Notable)
20 September 1971	Chadron 3SW, US	daily rain	47.8 mm (1.9 in)	24.4 mm (1.0 in)	20 years	43 of 100 (Notable)
20 September 1971	Tweed, CA	daily rain	40.9 mm (1.6 in)	26.9 mm (1.1 in)	40 years	42 of 100 (Notable)
20 September 1971	Mistassini Post, CA	daily rain	39.9 mm (1.6 in)	19.1 mm (0.8 in)	26 years	42 of 100 (Notable)
20 September 1971	Griffiss AFB, US	daily rain	36.6 mm (1.4 in)	10.2 mm (0.4 in)	76 years	42 of 100 (Notable)
20 September 1971	Gatesville, US	daily low max	17.2 C (63.0 F)	6.7 C (12.1 F)	57 years	41 of 100 (Notable)
20 September 1971	Bourke Post Office, AU	daily high min	18.9 C (66.0 F)	0.6 C (1.1 F)	97 years	40 of 100 (Notable)
20 September 1971	Scotia, CA	daily rain	35.6 mm (1.4 in)	23.4 mm (0.9 in)	40 years	40 of 100 (Notable)
20 September 1971	Port Stanley, CA	daily rain	25.4 mm (1.0 in)	7.9 mm (0.31 in)	70 years	40 of 100 (Notable)
20 September 1971	Carlsbad, US	daily low max	14.4 C (57.9 F)	7.3 C (13.1 F)	53 years	40 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 1971

Records set or tied on this calendar date in each year from 1812 to 1971. 1971 had 884 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 1971-09-20: 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 20	725
20 to 40	23
40 to 60	2
60 to 80	0
80 to 100	0
100 to 120	1
120 to 140	1