Weather Records on 18 September 1971

1,245 weather records were set or tied worldwide on 18 September 1971. Highest significance: Sao Jose Do Egito, BR.

Key Facts for 18 September 1971

On 18 September 1971, 1,245 weather records were set or tied at long-record stations worldwide.
155 were record highs and 776 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 60 monthly and 1,185 daily.
Sao Jose Do Egito set a monthly record daily precipitation of 64.1 mm (2.5 in) on 18 September 1971.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 416 records.

Record Map

1,245 stations

1,245 station records on 18 September 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sao Jose Do Egito	Brazil	Record daily precipitation	64.1 mm (2.5 in)	65 of 100 (Major)
Dublin	United States	Record daily precipitation	103.4 mm (4.1 in)	65 of 100 (Major)
Chacon	United States	Record daily snowfall	20.3 cm (8.0 in)	64 of 100 (Major)
Norcross	United States	Record daily precipitation	86.1 mm (3.4 in)	63 of 100 (Major)
Perry	United States	Record daily precipitation	78.7 mm (3.1 in)	63 of 100 (Major)
Sertania (Alagoa de Baixo)	Brazil	Record daily precipitation	38.0 mm (1.5 in)	61 of 100 (Major)
Red Rvr	United States	Record low maximum temperature	1.7 C (35.1 F)	60 of 100 (Major)
Sao Joao Do Tigre	Brazil	Record daily precipitation	57.2 mm (2.3 in)	59 of 100 (Notable)
Princesa Isabel	Brazil	Record daily precipitation	28.0 mm (1.1 in)	58 of 100 (Notable)
Corona	United States	Record low maximum temperature	6.1 C (43.0 F)	58 of 100 (Notable)
Estancia	Brazil	Record daily precipitation	68.3 mm (2.7 in)	56 of 100 (Notable)
Gayvoron	Ukraine	Record daily precipitation	77.7 mm (3.1 in)	55 of 100 (Notable)
Mountainair	United States	Record low maximum temperature	10.0 C (50.0 F)	54 of 100 (Notable)
Saguache	United States	Record low maximum temperature	6.1 C (43.0 F)	53 of 100 (Notable)
Gainesville	United States	Record daily precipitation	61.5 mm (2.4 in)	52 of 100 (Notable)
Des Moines	United States	Record low maximum temperature	2.8 C (37.0 F)	52 of 100 (Notable)
Mc Intosh 4 NW	United States	Record low maximum temperature	7.2 C (45.0 F)	51 of 100 (Notable)
Springer	United States	Record low maximum temperature	6.7 C (44.1 F)	51 of 100 (Notable)
Bom Conselho	Brazil	Record daily precipitation	30.5 mm (1.2 in)	50 of 100 (Notable)
Kassler	United States	Record daily snowfall	15.2 cm (6.0 in)	50 of 100 (Notable)
Longmont 2 ESE	United States	Record daily snowfall	10.2 cm (4.0 in)	49 of 100 (Notable)
Walsenburg 1 NW	United States	Record low maximum temperature	2.8 C (37.0 F)	49 of 100 (Notable)
Roswell Muni AP	United States	Record low maximum temperature	8.3 C (46.9 F)	49 of 100 (Notable)
Pesqueira	Brazil	Record daily precipitation	31.1 mm (1.2 in)	48 of 100 (Notable)
Paripiranga	Brazil	Record daily precipitation	34.3 mm (1.4 in)	48 of 100 (Notable)
Claremore 2 ENE	United States	Record daily precipitation	94.0 mm (3.7 in)	48 of 100 (Notable)
Cicero Dantas	Brazil	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Elkhart	United States	Record low maximum temperature	4.4 C (39.9 F)	47 of 100 (Notable)
Ralston	United States	Record daily precipitation	87.6 mm (3.4 in)	47 of 100 (Notable)
Watonga	United States	Record daily precipitation	55.9 mm (2.2 in)	47 of 100 (Notable)
Vona	United States	Record daily snowfall	20.3 cm (8.0 in)	46 of 100 (Notable)
Monticello	United States	Record daily precipitation	50.8 mm (2.0 in)	46 of 100 (Notable)
Syracuse 1NE	United States	Record low maximum temperature	11.1 C (52.0 F)	46 of 100 (Notable)
Eagle Nest	United States	Record daily snowfall	15.2 cm (6.0 in)	46 of 100 (Notable)
Raymondville	United States	Record daily precipitation	137.2 mm (5.4 in)	46 of 100 (Notable)
Stillwater 2 W	United States	Record daily precipitation	84.6 mm (3.3 in)	45 of 100 (Notable)
Goliad	United States	Record daily precipitation	77.0 mm (3.0 in)	45 of 100 (Notable)
Kenton	United States	Record low maximum temperature	7.2 C (45.0 F)	44 of 100 (Notable)
Kingfisher	United States	Record daily precipitation	74.4 mm (2.9 in)	44 of 100 (Notable)
Pawhuska	United States	Record low maximum temperature	13.3 C (55.9 F)	44 of 100 (Notable)
Jaral de Berrios	Mexico	Record daily precipitation	55.9 mm (2.2 in)	43 of 100 (Notable)
Boulder	United States	Record daily snowfall	7.6 cm (3.0 in)	43 of 100 (Notable)
Fraser	United States	Record low maximum temperature	1.7 C (35.1 F)	43 of 100 (Notable)
Westcliffe	United States	Record daily snowfall	7.6 cm (3.0 in)	43 of 100 (Notable)
Warrenton	United States	Record daily precipitation	96.5 mm (3.8 in)	43 of 100 (Notable)
Bandelier Nm	United States	Record low maximum temperature	5.6 C (42.1 F)	43 of 100 (Notable)
Magdalena	United States	Record low maximum temperature	10.6 C (51.1 F)	43 of 100 (Notable)
Valmora	United States	Record low maximum temperature	5.6 C (42.1 F)	43 of 100 (Notable)
Tahlequah	United States	Record low maximum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Independence	United States	Record low maximum temperature	11.1 C (52.0 F)	42 of 100 (Notable)
Goodwell Rsch STN	United States	Record low maximum temperature	8.3 C (46.9 F)	42 of 100 (Notable)
Leipzig-Holzhausen	Germany	Record low maximum temperature	10.2 C (50.4 F)	41 of 100 (Notable)
Jemez Springs	United States	Record low maximum temperature	10.6 C (51.1 F)	41 of 100 (Notable)
Tatum	United States	Record low maximum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Arnett 3NE	United States	Record daily precipitation	48.8 mm (1.9 in)	41 of 100 (Notable)
Okeene	United States	Record daily precipitation	61.0 mm (2.4 in)	41 of 100 (Notable)
Cortez	United States	Record low minimum temperature	-4.4 C (24.1 F)	40 of 100 (Notable)
Dillon 1 E	United States	Record low maximum temperature	3.3 C (37.9 F)	40 of 100 (Notable)
Georgetown	United States	Record daily snowfall	7.6 cm (3.0 in)	40 of 100 (Notable)
Spicer	United States	Record low minimum temperature	-15.6 C (3.9 F)	40 of 100 (Notable)

Counts by Type and Timescale

1,245 records

Records set or tied on 18 September 1971 by type: Highest daily maximum 58, Lowest daily maximum 436, Highest daily minimum 97, Lowest daily minimum 340, Heaviest daily rainfall 283, Heaviest daily snowfall 27, Deepest snow cover 4.

Records on 18 September 1971 by type
Record type	Records
Highest daily maximum	58
Lowest daily maximum	436
Highest daily minimum	97
Lowest daily minimum	340
Heaviest daily rainfall	283
Heaviest daily snowfall	27
Deepest snow cover	4

Records on 18 September 1971 by timescale: all-time 0, monthly 60, daily 1,185.

How Much Records Were Beaten By

1,082 broken records

Margins by which the 1,082 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 203.0. Ties are not counted.

Top 20 by Significance

18 September 1971

Top 20 records on 18 September 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1971	Sao Jose Do Egito, BR	monthly rain	64.1 mm (2.5 in)	39.8 mm (1.6 in)	38 years	65 of 100 (Major)
18 September 1971	Dublin, US	daily rain	103.4 mm (4.1 in)	69.6 mm (2.7 in)	56 years	65 of 100 (Major)
18 September 1971	Chacon, US	daily snowfall	20.3 cm (8.0 in)	20.3 cm (8.0 in)	60 years	64 of 100 (Major)
18 September 1971	Norcross, US	daily rain	86.1 mm (3.4 in)	60.2 mm (2.4 in)	56 years	63 of 100 (Major)
18 September 1971	Perry, US	daily rain	78.7 mm (3.1 in)	76.2 mm (3.0 in)	54 years	63 of 100 (Major)
18 September 1971	Sertania (Alagoa de Baixo), BR	daily rain	38.0 mm (1.5 in)	38.0 mm (1.5 in)	60 years	61 of 100 (Major)
18 September 1971	Red Rvr, US	daily low max	1.7 C (35.1 F)	13.9 C (25.0 F)	48 years	60 of 100 (Major)
18 September 1971	Sao Joao Do Tigre, BR	monthly rain	57.2 mm (2.3 in)	37.2 mm (1.5 in)	30 years	59 of 100 (Notable)
18 September 1971	Princesa Isabel, BR	daily rain	28.0 mm (1.1 in)	25.9 mm (1.0 in)	45 years	58 of 100 (Notable)
18 September 1971	Corona, US	daily low max	6.1 C (43.0 F)	15.0 C (27.0 F)	44 years	58 of 100 (Notable)
18 September 1971	Estancia, BR	daily rain	68.3 mm (2.7 in)	29.4 mm (1.2 in)	48 years	56 of 100 (Notable)
18 September 1971	Gayvoron, UA	monthly rain	77.7 mm (3.1 in)	29.5 mm (1.2 in)	15 years	55 of 100 (Notable)
18 September 1971	Mountainair, US	daily low max	10.0 C (50.0 F)	10.6 C (19.1 F)	60 years	54 of 100 (Notable)
18 September 1971	Saguache, US	daily low max	6.1 C (43.0 F)	9.5 C (17.1 F)	65 years	53 of 100 (Notable)
18 September 1971	Gainesville, US	daily rain	61.5 mm (2.4 in)	38.6 mm (1.5 in)	64 years	52 of 100 (Notable)
18 September 1971	Des Moines, US	daily low max	2.8 C (37.0 F)	14.4 C (25.9 F)	48 years	52 of 100 (Notable)
18 September 1971	Mc Intosh 4 NW, US	daily low max	7.2 C (45.0 F)	15.0 C (27.0 F)	28 years	51 of 100 (Notable)
18 September 1971	Springer, US	daily low max	6.7 C (44.1 F)	12.2 C (22.0 F)	48 years	51 of 100 (Notable)
18 September 1971	Bom Conselho, BR	daily rain	30.5 mm (1.2 in)	25.3 mm (1.0 in)	25 years	50 of 100 (Notable)
18 September 1971	Kassler, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	50 years	50 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

1803 to 1971

Records set or tied on this calendar date in each year from 1803 to 1971. 1971 had 1,245 records.

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

Records on 09-18 in each year
Year	Records
1803	1
1811	1
1814	1
1819	1
1829	1
1832	1
1834	1
1835	1
1837	2
1847	2
1848	1
1849	1
1851	4
1859	1
1861	1
1865	1
1869	1
1871	1
1875	1
1876	2
1877	1
1879	1
1880	1
1881	1
1882	1
1885	1
1886	4
1889	6
1890	1
1891	1
1893	4
1894	2
1895	2
1896	4
1897	3
1898	5
1899	3
1900	2
1901	10
1902	8
1903	58
1904	6
1905	22
1906	16
1907	4
1908	11
1909	17
1910	5
1911	8
1912	43
1913	44
1914	56
1915	41
1916	58
1917	99
1918	57
1919	48
1920	56
1921	213
1922	45
1923	114
1924	62
1925	269
1926	205
1927	189
1928	114
1929	309
1930	124
1931	429
1932	226
1933	370
1934	188
1935	281
1936	155
1937	422
1938	373
1939	190
1940	402
1941	318
1942	1,001
1943	624
1944	503
1945	732
1946	576
1947	927
1948	427
1949	356
1950	370
1951	320
1952	340
1953	245
1954	446
1955	672
1956	587
1957	429
1958	491
1959	829
1960	351
1961	478
1962	360
1963	453
1964	282
1965	1,172
1966	498
1967	357
1968	763
1969	424
1970	377
1971	1,245
1972	691
1973	593
1974	559
1975	976
1976	615
1977	619
1978	1,162
1979	709
1980	652
1981	1,671
1982	603
1983	936
1984	951
1985	636
1986	730
1987	1,244
1988	997
1989	778
1990	904
1991	1,377
1992	821
1993	747
1994	852
1995	935
1996	1,237
1997	935
1998	1,038
1999	583
2000	1,146
2001	993
2002	828
2003	815
2004	1,027
2005	781
2006	1,309
2007	670
2008	697
2009	692
2010	1,040
2011	1,050
2012	922
2013	666
2014	682
2015	934
2016	893
2017	518
2018	1,200
2019	768
2020	682
2021	582
2022	613
2023	639
2024	687
2025	471
2026	864

Download the Data

Data for records on 1971-09-18: 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 50	1,048
50 to 100	26
100 to 150	3
150 to 200	4
200 to 250	1