Weather Records on 21 September 1971

645 weather records were set or tied worldwide on 21 September 1971. Highest significance: Bendemeer (Caroline St), AU.

Key Facts for 21 September 1971

On 21 September 1971, 645 weather records were set or tied at long-record stations worldwide.
82 were record highs and 408 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 642 daily.
Bendemeer (Caroline St) set a daily record precipitation of 41.9 mm (1.6 in) on 21 September 1971.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 450 records.

Record Map

645 stations

645 station records on 21 September 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bendemeer (Caroline St)	Australia	Record daily precipitation	41.9 mm (1.6 in)	59 of 100 (Notable)
Perpignan	France	Record daily precipitation	95.9 mm (3.8 in)	55 of 100 (Notable)
Wollomombi (Wallamumbi)	Australia	Record daily precipitation	41.9 mm (1.6 in)	51 of 100 (Notable)
Buena Vista 2S	United States	Record daily snowfall	12.7 cm (5.0 in)	51 of 100 (Notable)
Maceio (Aeroporto)	Brazil	Record daily precipitation	87.8 mm (3.5 in)	50 of 100 (Notable)
Harrison	United States	Record daily snowfall	10.2 cm (4.0 in)	50 of 100 (Notable)
Monticello Muni AP	United States	Record low maximum temperature	18.3 C (64.9 F)	50 of 100 (Notable)
Pte de Chassiron	France	Record daily precipitation	50.4 mm (2.0 in)	48 of 100 (Notable)
Armidale (Forglen)	Australia	Record daily precipitation	50.0 mm (2.0 in)	45 of 100 (Notable)
Guyra Post Office	Australia	Record daily precipitation	44.5 mm (1.8 in)	42 of 100 (Notable)
Correntes	Brazil	Record daily precipitation	32.0 mm (1.3 in)	41 of 100 (Notable)
Harrison	United States	Record daily precipitation	25.9 mm (1.0 in)	40 of 100 (Notable)
Harrison	United States	Record snow depth	10.2 cm (4.0 in)	40 of 100 (Notable)
Hornindal	Norway	Record daily precipitation	38.1 mm (1.5 in)	38 of 100 (Notable)
Limbri Post Office	Australia	Record daily precipitation	38.1 mm (1.5 in)	37 of 100 (Notable)
Plain Dealing	United States	Record low maximum temperature	19.4 C (66.9 F)	37 of 100 (Notable)
Port Lavaca 2	United States	Record low maximum temperature	23.9 C (75.0 F)	37 of 100 (Notable)
Rosalia	United States	Record low minimum temperature	-5.0 C (23.0 F)	37 of 100 (Notable)
Hakalau 142	United States	Record daily precipitation	52.1 mm (2.1 in)	36 of 100 (Notable)
Ripley	United States	Record low maximum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Hecla	United States	Record daily snowfall	9.1 cm (3.6 in)	35 of 100 (Notable)
Tahoka	United States	Record low minimum temperature	3.9 C (39.0 F)	34 of 100 (Routine)
Baton Rouge Metro AP	United States	Record daily precipitation	56.6 mm (2.2 in)	34 of 100 (Routine)
Attunga (Garthowen)	Australia	Record daily precipitation	26.7 mm (1.1 in)	33 of 100 (Routine)
St Joseph 3 N	United States	Record low maximum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Two Buttes	United States	Record low maximum temperature	15.0 C (59.0 F)	32 of 100 (Routine)
Victor	United States	Record low maximum temperature	3.9 C (39.0 F)	32 of 100 (Routine)
Victor	United States	Record low minimum temperature	-8.9 C (16.0 F)	32 of 100 (Routine)
Water Valley	United States	Record low maximum temperature	17.8 C (64.0 F)	32 of 100 (Routine)
Scottsbluff W B Heilig Fld AP	United States	Record low maximum temperature	5.0 C (41.0 F)	32 of 100 (Routine)
Uralla (Salisbury Court)	Australia	Record daily precipitation	27.2 mm (1.1 in)	31 of 100 (Routine)
Helena	United States	Record low maximum temperature	19.4 C (66.9 F)	31 of 100 (Routine)
Grangeville	United States	Record low minimum temperature	-3.3 C (26.1 F)	31 of 100 (Routine)
Minden	United States	Record low maximum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Augusta	United States	Record low minimum temperature	-6.7 C (19.9 F)	31 of 100 (Routine)
Colorado City	United States	Record low minimum temperature	3.3 C (37.9 F)	31 of 100 (Routine)
Sugar Land	United States	Record low maximum temperature	21.1 C (70.0 F)	31 of 100 (Routine)
Sulphur Springs	United States	Record low maximum temperature	23.3 C (73.9 F)	31 of 100 (Routine)
Wheatland 4N	United States	Record low maximum temperature	4.4 C (39.9 F)	31 of 100 (Routine)
Armidale (Radio Station 2Ad)	Australia	Record daily precipitation	36.8 mm (1.4 in)	30 of 100 (Routine)
Prince	Canada	Record low minimum temperature	-7.8 C (18.0 F)	30 of 100 (Routine)
Warren 2 ENE	United States	Record low maximum temperature	22.8 C (73.0 F)	30 of 100 (Routine)
Leroy 5 WSW	United States	Record low maximum temperature	3.3 C (37.9 F)	30 of 100 (Routine)
Calhoun 2 N	United States	Record low maximum temperature	19.4 C (66.9 F)	30 of 100 (Routine)
Ft Benton	United States	Record low minimum temperature	-2.8 C (27.0 F)	30 of 100 (Routine)
Haskell	United States	Record low minimum temperature	5.6 C (42.1 F)	30 of 100 (Routine)
Livingston 2 NNE	United States	Record low maximum temperature	20.0 C (68.0 F)	30 of 100 (Routine)
Uralla (Dumaresq St)	Australia	Record daily precipitation	30.5 mm (1.2 in)	29 of 100 (Routine)
Tierra Blanca (Smn)	Mexico	Record daily precipitation	149.9 mm (5.9 in)	29 of 100 (Routine)
Leesville	United States	Record low maximum temperature	20.6 C (69.1 F)	29 of 100 (Routine)
Canton 4N	United States	Record low maximum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Kosciusko	United States	Record low maximum temperature	18.9 C (66.0 F)	29 of 100 (Routine)
Louisville	United States	Record low maximum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Lead	United States	Record daily snowfall	7.6 cm (3.0 in)	29 of 100 (Routine)
Goliad	United States	Record low maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Grapevine Dam	United States	Record low minimum temperature	7.8 C (46.0 F)	29 of 100 (Routine)
Snyder	United States	Record low minimum temperature	5.6 C (42.1 F)	29 of 100 (Routine)
Wills Pt	United States	Record low maximum temperature	21.1 C (70.0 F)	29 of 100 (Routine)
Grapeview 3 SW	United States	Record low minimum temperature	2.8 C (37.0 F)	29 of 100 (Routine)
Hopkinsville	United States	Record low maximum temperature	17.8 C (64.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

645 records

Records set or tied on 21 September 1971 by type: Highest daily maximum 36, Lowest daily maximum 214, Highest daily minimum 46, Lowest daily minimum 194, Heaviest daily rainfall 141, Heaviest daily snowfall 12, Deepest snow cover 2.

Records on 21 September 1971 by type
Record type	Records
Highest daily maximum	36
Lowest daily maximum	214
Highest daily minimum	46
Lowest daily minimum	194
Heaviest daily rainfall	141
Heaviest daily snowfall	12
Deepest snow cover	2

Records on 21 September 1971 by timescale: all-time 0, monthly 3, daily 642.

How Much Records Were Beaten By

507 broken records

Margins by which the 507 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

21 September 1971

Top 20 records on 21 September 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1971	Bendemeer (Caroline St), AU	daily rain	41.9 mm (1.6 in)	24.9 mm (1.0 in)	79 years	59 of 100 (Notable)
21 September 1971	Perpignan, FR	daily rain	95.9 mm (3.8 in)	83.3 mm (3.3 in)	28 years	55 of 100 (Notable)
21 September 1971	Wollomombi (Wallamumbi), AU	daily rain	41.9 mm (1.6 in)	20.8 mm (0.8 in)	60 years	51 of 100 (Notable)
21 September 1971	Buena Vista 2S, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	65 years	51 of 100 (Notable)
21 September 1971	Maceio (Aeroporto), BR	daily rain	87.8 mm (3.5 in)	67.5 mm (2.7 in)	16 years	50 of 100 (Notable)
21 September 1971	Harrison, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	77 years	50 of 100 (Notable)
21 September 1971	Monticello Muni AP, US	daily low max	18.3 C (64.9 F)	6.1 C (11.0 F)	87 years	50 of 100 (Notable)
21 September 1971	Pte de Chassiron, FR	daily rain	50.4 mm (2.0 in)	42.4 mm (1.7 in)	2 years	48 of 100 (Notable)
21 September 1971	Armidale (Forglen), AU	daily rain	50.0 mm (2.0 in)	36.8 mm (1.4 in)	8 years	45 of 100 (Notable)
21 September 1971	Guyra Post Office, AU	daily rain	44.5 mm (1.8 in)	28.8 mm (1.1 in)	14 years	42 of 100 (Notable)
21 September 1971	Correntes, BR	daily rain	32.0 mm (1.3 in)	22.2 mm (0.9 in)	6 years	41 of 100 (Notable)
21 September 1971	Harrison, US	daily rain	25.9 mm (1.0 in)	15.7 mm (0.6 in)	46 years	40 of 100 (Notable)
21 September 1971	Harrison, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	77 years	40 of 100 (Notable)
21 September 1971	Hornindal, NO	daily rain	38.1 mm (1.5 in)	15.2 mm (0.6 in)	60 years	38 of 100 (Notable)
21 September 1971	Limbri Post Office, AU	daily rain	38.1 mm (1.5 in)	25.7 mm (1.0 in)	14 years	37 of 100 (Notable)
21 September 1971	Plain Dealing, US	daily low max	19.4 C (66.9 F)	3.4 C (6.1 F)	72 years	37 of 100 (Notable)
21 September 1971	Port Lavaca 2, US	daily low max	23.9 C (75.0 F)	2.8 C (5.0 F)	69 years	37 of 100 (Notable)
21 September 1971	Rosalia, US	daily low min	-5.0 C (23.0 F)	3.3 C (5.9 F)	75 years	37 of 100 (Notable)
21 September 1971	Hakalau 142, US	daily rain	52.1 mm (2.1 in)	24.7 mm (1.0 in)	56 years	36 of 100 (Notable)
21 September 1971	Ripley, US	daily low max	17.2 C (63.0 F)	3.4 C (6.1 F)	69 years	35 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

1805 to 1971

Records set or tied on this calendar date in each year from 1805 to 1971. 1971 had 645 records.

Counts for years before the ledger starts come from the same station rules.

Records on 09-21 in each year
Year	Records
1805	1
1812	1
1825	2
1840	1
1841	1
1842	1
1848	1
1854	1
1856	2
1868	1
1872	2
1873	1
1877	1
1878	1
1881	1
1882	1
1884	1
1886	1
1888	2
1889	1
1891	10
1892	1
1893	10
1894	2
1895	3
1896	2
1897	6
1898	6
1899	3
1900	2
1901	5
1902	5
1903	8
1904	20
1905	12
1906	17
1907	10
1908	17
1909	10
1910	8
1911	18
1912	26
1913	37
1914	29
1915	34
1916	48
1917	28
1918	43
1919	54
1920	29
1921	64
1922	35
1923	232
1924	291
1925	278
1926	178
1927	165
1928	81
1929	232
1930	82
1931	681
1932	242
1933	193
1934	492
1935	199
1936	329
1937	487
1938	508
1939	308
1940	908
1941	416
1942	291
1943	407
1944	413
1945	507
1946	176
1947	534
1948	301
1949	298
1950	334
1951	241
1952	430
1953	382
1954	453
1955	752
1956	1,100
1957	366
1958	588
1959	513
1960	418
1961	441
1962	1,085
1963	306
1964	374
1965	1,088
1966	565
1967	577
1968	790
1969	593
1970	708
1971	645
1972	599
1973	421
1974	652
1975	528
1976	694
1977	918
1978	818
1979	736
1980	990
1981	696
1982	1,484
1983	2,207
1984	707
1985	796
1986	671
1987	965
1988	557
1989	1,002
1990	716
1991	1,021
1992	752
1993	911
1994	713
1995	2,002
1996	1,233
1997	1,112
1998	1,481
1999	1,025
2000	884
2001	718
2002	696
2003	959
2004	888
2005	1,143
2006	920
2007	742
2008	740
2009	715
2010	1,290
2011	542
2012	595
2013	769
2014	716
2015	565
2016	989
2017	1,178
2018	1,051
2019	833
2020	580
2021	465
2022	1,049
2023	783
2024	470
2025	588
2026	469

Download the Data

Data for records on 1971-09-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 20	482
20 to 40	15
40 to 60	3
60 to 80	3
80 to 100	1
100 to 120	2
120 to 140	1