Weather Records on 18 September 1970

377 weather records were set or tied worldwide on 18 September 1970. Highest significance: Morgantown Muni AP, US.

Key Facts for 18 September 1970

On 18 September 1970, 377 weather records were set or tied at long-record stations worldwide.
124 were record highs and 35 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 4 monthly and 372 daily.
Morgantown Muni AP set a daily record precipitation of 42.2 mm (1.7 in) on 18 September 1970.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 422 records.

Record Map

377 stations

377 station records on 18 September 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Morgantown Muni AP	United States	Record daily precipitation	42.2 mm (1.7 in)	59 of 100 (Notable)
Arcadia	United States	Record daily precipitation	95.5 mm (3.8 in)	58 of 100 (Notable)
Mudhol	India	Record daily precipitation	114.3 mm (4.5 in)	55 of 100 (Notable)
Wilburton 9 ENE	United States	Record daily precipitation	103.6 mm (4.1 in)	51 of 100 (Notable)
Mohania(Mahania)	India	Record daily precipitation	110.6 mm (4.4 in)	48 of 100 (Notable)
Przhevalsk	Kyrgyzstan	Record daily precipitation	28.1 mm (1.1 in)	45 of 100 (Notable)
Ahmadnagar	India	Record daily precipitation	190.0 mm (7.5 in)	44 of 100 (Notable)
Korsakov	Russia	Record daily precipitation	61.4 mm (2.4 in)	43 of 100 (Notable)
Pueblo City Rsvr	United States	Record daily precipitation	26.7 mm (1.1 in)	42 of 100 (Notable)
Old Forge	United States	Record daily precipitation	37.1 mm (1.5 in)	42 of 100 (Notable)
Syktyvkar	Russia	Record daily precipitation	41.7 mm (1.6 in)	41 of 100 (Notable)
Greenwood	United States	Record daily precipitation	73.4 mm (2.9 in)	41 of 100 (Notable)
Russellville	United States	Record daily precipitation	62.2 mm (2.4 in)	41 of 100 (Notable)
Alma	United States	Record daily precipitation	38.4 mm (1.5 in)	41 of 100 (Notable)
Poteau	United States	Record daily precipitation	97.8 mm (3.9 in)	41 of 100 (Notable)
Centralia	United States	Record daily precipitation	42.7 mm (1.7 in)	40 of 100 (Notable)
Monticello	United States	Record daily precipitation	43.4 mm (1.7 in)	40 of 100 (Notable)
Zolotoj	Russia	Record daily precipitation	126.7 mm (5.0 in)	38 of 100 (Notable)
Hawi 168	United States	Record daily precipitation	32.3 mm (1.3 in)	38 of 100 (Notable)
Pocahontas 1	United States	Record daily precipitation	55.9 mm (2.2 in)	37 of 100 (Notable)
Waldron	United States	Record daily precipitation	52.8 mm (2.1 in)	35 of 100 (Notable)
Alexandria	United States	Record daily precipitation	39.9 mm (1.6 in)	35 of 100 (Notable)
Gadhinglaj	India	Record daily precipitation	105.0 mm (4.1 in)	34 of 100 (Routine)
Ironton	United States	Record daily precipitation	32.3 mm (1.3 in)	34 of 100 (Routine)
Hot Springs	United States	Record high maximum temperature	31.1 C (88.0 F)	34 of 100 (Routine)
Tuskahoma	United States	Record daily precipitation	53.3 mm (2.1 in)	33 of 100 (Routine)
Brady	United States	Record daily precipitation	54.1 mm (2.1 in)	33 of 100 (Routine)
Elkins- Randolph Co AP	United States	Record daily precipitation	27.7 mm (1.1 in)	33 of 100 (Routine)
Kurtha	India	Record daily precipitation	52.6 mm (2.1 in)	32 of 100 (Routine)
Duncan	United States	Record daily precipitation	27.2 mm (1.1 in)	32 of 100 (Routine)
Eldon	United States	Record daily precipitation	51.3 mm (2.0 in)	32 of 100 (Routine)
W Pt	United States	Record daily precipitation	32.5 mm (1.3 in)	32 of 100 (Routine)
Mexia	United States	Record daily precipitation	81.0 mm (3.2 in)	32 of 100 (Routine)
Milford 2 SE	United States	Record high maximum temperature	34.4 C (93.9 F)	31 of 100 (Routine)
Durant	United States	Record daily precipitation	56.1 mm (2.2 in)	31 of 100 (Routine)
Lynnville 4 SSW	United States	Record daily precipitation	42.2 mm (1.7 in)	31 of 100 (Routine)
Puttur	India	Record daily precipitation	68.2 mm (2.7 in)	30 of 100 (Routine)
Vastervik	Sweden	Record high maximum temperature	21.8 C (71.2 F)	30 of 100 (Routine)
Ozark	United States	Record daily precipitation	40.9 mm (1.6 in)	30 of 100 (Routine)
Bettiah	India	Record daily precipitation	181.6 mm (7.1 in)	29 of 100 (Routine)
Avalon Pleasure Pier	United States	Record low minimum temperature	8.9 C (48.0 F)	29 of 100 (Routine)
Orono	United States	Record low maximum temperature	12.2 C (54.0 F)	29 of 100 (Routine)
Put-In-Bay	United States	Record daily precipitation	25.9 mm (1.0 in)	28 of 100 (Routine)
Coalgate 1 WNW	United States	Record daily precipitation	53.3 mm (2.1 in)	28 of 100 (Routine)
Greeneville Exp STN	United States	Record high minimum temperature	20.6 C (69.1 F)	28 of 100 (Routine)
Honey Grove	United States	Record daily precipitation	53.3 mm (2.1 in)	28 of 100 (Routine)
Cairo 3 S	United States	Record daily precipitation	45.7 mm (1.8 in)	28 of 100 (Routine)
Motihari	India	Record daily precipitation	173.0 mm (6.8 in)	26 of 100 (Routine)
Ternej	Russia	Record daily precipitation	90.3 mm (3.6 in)	26 of 100 (Routine)
Mammoth Cave	United States	Record daily precipitation	50.8 mm (2.0 in)	26 of 100 (Routine)
Greenville 2 NE	United States	Record high minimum temperature	18.9 C (66.0 F)	26 of 100 (Routine)
Brownwood 2NE	United States	Record daily precipitation	41.1 mm (1.6 in)	26 of 100 (Routine)
San Juan del Rio	Mexico	Record daily precipitation	35.3 mm (1.4 in)	25 of 100 (Routine)
Cambridge Water Trmt P	United States	Record high maximum temperature	34.4 C (93.9 F)	25 of 100 (Routine)
Oakland 1 SE	United States	Record daily precipitation	27.9 mm (1.1 in)	25 of 100 (Routine)
Browning	United States	Record high minimum temperature	13.3 C (55.9 F)	25 of 100 (Routine)
Orovada 3 W	United States	Record low minimum temperature	-6.7 C (19.9 F)	25 of 100 (Routine)
Kingston	United States	Record daily precipitation	42.4 mm (1.7 in)	25 of 100 (Routine)
Ft Meade	United States	Record high maximum temperature	33.3 C (91.9 F)	25 of 100 (Routine)
Clearwater	United States	Record high minimum temperature	12.8 C (55.0 F)	25 of 100 (Routine)

Counts by Type and Timescale

377 records

Records set or tied on 18 September 1970 by type: Highest daily maximum 34, Lowest daily maximum 17, Highest daily minimum 90, Lowest daily minimum 18, Heaviest daily rainfall 218.

Records on 18 September 1970 by type
Record type	Records
Highest daily maximum	34
Lowest daily maximum	17
Highest daily minimum	90
Lowest daily minimum	18
Heaviest daily rainfall	218
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 1970 by timescale: all-time 1, monthly 4, daily 372.

How Much Records Were Beaten By

299 broken records

Margins by which the 299 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 80.2. Ties are not counted.

Top 20 by Significance

18 September 1970

Top 20 records on 18 September 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1970	Morgantown Muni AP, US	daily rain	42.2 mm (1.7 in)	23.4 mm (0.9 in)	94 years	59 of 100 (Notable)
18 September 1970	Arcadia, US	daily rain	95.5 mm (3.8 in)	48.5 mm (1.9 in)	68 years	58 of 100 (Notable)
18 September 1970	Mudhol, IN	daily rain	114.3 mm (4.5 in)	63.5 mm (2.5 in)	44 years	55 of 100 (Notable)
18 September 1970	Wilburton 9 ENE, US	daily rain	103.6 mm (4.1 in)	80.2 mm (3.2 in)	23 years	51 of 100 (Notable)
18 September 1970	Mohania(Mahania), IN	daily rain	110.6 mm (4.4 in)	59.8 mm (2.4 in)	68 years	48 of 100 (Notable)
18 September 1970	Przhevalsk, KG	daily rain	28.1 mm (1.1 in)	15.5 mm (0.6 in)	41 years	45 of 100 (Notable)
18 September 1970	Ahmadnagar, IN	all-time rain	190.0 mm (7.5 in)	12.7 mm (0.5 in)	39 years	44 of 100 (Notable)
18 September 1970	Korsakov, RU	daily rain	61.4 mm (2.4 in)	32.2 mm (1.3 in)	12 years	43 of 100 (Notable)
18 September 1970	Pueblo City Rsvr, US	daily rain	26.7 mm (1.1 in)	15.0 mm (0.6 in)	47 years	42 of 100 (Notable)
18 September 1970	Old Forge, US	daily rain	37.1 mm (1.5 in)	23.1 mm (0.9 in)	56 years	42 of 100 (Notable)
18 September 1970	Syktyvkar, RU	daily rain	41.7 mm (1.6 in)	8.9 mm (0.35 in)	48 years	41 of 100 (Notable)
18 September 1970	Greenwood, US	daily rain	73.4 mm (2.9 in)	56.9 mm (2.2 in)	20 years	41 of 100 (Notable)
18 September 1970	Russellville, US	daily rain	62.2 mm (2.4 in)	44.4 mm (1.7 in)	20 years	41 of 100 (Notable)
18 September 1970	Alma, US	daily rain	38.4 mm (1.5 in)	14.3 mm (0.6 in)	70 years	41 of 100 (Notable)
18 September 1970	Poteau, US	daily rain	97.8 mm (3.9 in)	45.2 mm (1.8 in)	33 years	41 of 100 (Notable)
18 September 1970	Centralia, US	daily rain	42.7 mm (1.7 in)	22.6 mm (0.9 in)	68 years	40 of 100 (Notable)
18 September 1970	Monticello, US	daily rain	43.4 mm (1.7 in)	23.1 mm (0.9 in)	57 years	40 of 100 (Notable)
18 September 1970	Zolotoj, RU	daily rain	126.7 mm (5.0 in)	62.7 mm (2.5 in)	12 years	38 of 100 (Notable)
18 September 1970	Hawi 168, US	daily rain	32.3 mm (1.3 in)	10.7 mm (0.4 in)	56 years	38 of 100 (Notable)
18 September 1970	Pocahontas 1, US	daily rain	55.9 mm (2.2 in)	11.4 mm (0.4 in)	68 years	37 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 1970

Records set or tied on this calendar date in each year from 1803 to 1970. 1970 had 377 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 1970-09-18: 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 20	258
20 to 40	30
40 to 60	8
60 to 80	2
80 to 100	1