Weather Records on 18 September 1973

593 weather records were set or tied worldwide on 18 September 1973. Highest significance: Genoa, IT.

Key Facts for 18 September 1973

On 18 September 1973, 593 weather records were set or tied at long-record stations worldwide.
89 were record highs and 383 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 589 daily.
Genoa set a daily record precipitation of 61.8 mm (2.4 in) on 18 September 1973.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 420 records.

Record Map

593 stations

593 station records on 18 September 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Genoa	Italy	Record daily precipitation	61.8 mm (2.4 in)	50 of 100 (Notable)
Morgantown Muni AP	United States	Record low maximum temperature	16.1 C (61.0 F)	39 of 100 (Notable)
Paragould	United States	Record low maximum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Sherman	United States	Record low maximum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Fazenda Sao Jeronimo	Brazil	Record daily precipitation	42.0 mm (1.7 in)	36 of 100 (Notable)
Chickamauga 2 SW	United States	Record daily precipitation	36.1 mm (1.4 in)	36 of 100 (Notable)
Willow Sprg Radio Kuku	United States	Record low maximum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Schenley Lock 5	United States	Record daily precipitation	25.4 mm (1.0 in)	35 of 100 (Notable)
Jonesboro 3 SSE	United States	Record low maximum temperature	19.4 C (66.9 F)	34 of 100 (Routine)
Garnett 1 E	United States	Record low minimum temperature	3.3 C (37.9 F)	34 of 100 (Routine)
Enosburg Falls	United States	Record daily precipitation	43.2 mm (1.7 in)	34 of 100 (Routine)
Rexton	Canada	Record daily precipitation	42.2 mm (1.7 in)	33 of 100 (Routine)
Marseille Obs. Palais-Lonchamp	France	Record low maximum temperature	18.0 C (64.4 F)	33 of 100 (Routine)
Tipton	United States	Record low maximum temperature	12.2 C (54.0 F)	33 of 100 (Routine)
Cottonwood Falls	United States	Record low minimum temperature	1.7 C (35.1 F)	33 of 100 (Routine)
Windsor	United States	Record low maximum temperature	13.3 C (55.9 F)	33 of 100 (Routine)
Fredonia	United States	Record low minimum temperature	3.3 C (37.9 F)	32 of 100 (Routine)
Red Cloud	United States	Record low minimum temperature	-1.1 C (30.0 F)	32 of 100 (Routine)
Eureka Springs 3 WNW	United States	Record low minimum temperature	3.3 C (37.9 F)	31 of 100 (Routine)
Antioch	United States	Record low maximum temperature	11.1 C (52.0 F)	31 of 100 (Routine)
Grinnell 3 SW	United States	Record low minimum temperature	0.0 C (32.0 F)	31 of 100 (Routine)
Newton	United States	Record low minimum temperature	1.7 C (35.1 F)	31 of 100 (Routine)
Abilene	United States	Record low minimum temperature	1.7 C (35.1 F)	31 of 100 (Routine)
Independence	United States	Record low minimum temperature	3.3 C (37.9 F)	31 of 100 (Routine)
Ness City	United States	Record low maximum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Nevada Wtp	United States	Record low minimum temperature	2.8 C (37.0 F)	31 of 100 (Routine)
Oregon	United States	Record low maximum temperature	12.8 C (55.0 F)	31 of 100 (Routine)
Culbertson	United States	Record low minimum temperature	-3.3 C (26.1 F)	31 of 100 (Routine)
Subiaco	United States	Record low maximum temperature	22.8 C (73.0 F)	30 of 100 (Routine)
Norwich	United States	Record low minimum temperature	4.4 C (39.9 F)	30 of 100 (Routine)
Olathe 3E	United States	Record low minimum temperature	4.4 C (39.9 F)	30 of 100 (Routine)
Pratt 3NW	United States	Record low minimum temperature	3.9 C (39.0 F)	30 of 100 (Routine)
Fife Lake 4 SW	United States	Record low maximum temperature	6.7 C (44.1 F)	30 of 100 (Routine)
Saint Johns	United States	Record low minimum temperature	2.2 C (36.0 F)	30 of 100 (Routine)
David City 4E	United States	Record low minimum temperature	-0.6 C (30.9 F)	30 of 100 (Routine)
Wanakena Rngr School	United States	Record daily precipitation	41.4 mm (1.6 in)	30 of 100 (Routine)
Enid	United States	Record low minimum temperature	5.6 C (42.1 F)	30 of 100 (Routine)
Perry	United States	Record low minimum temperature	5.0 C (41.0 F)	30 of 100 (Routine)
Bratsk	Russia	Record high minimum temperature	15.1 C (59.2 F)	29 of 100 (Routine)
Elkader 6 SSW	United States	Record low minimum temperature	-1.1 C (30.0 F)	29 of 100 (Routine)
Red Oak	United States	Record low minimum temperature	0.0 C (32.0 F)	29 of 100 (Routine)
Eskridge	United States	Record low minimum temperature	3.3 C (37.9 F)	29 of 100 (Routine)
Newton	United States	Record low minimum temperature	2.2 C (36.0 F)	29 of 100 (Routine)
Whitefish Pt	United States	Record low minimum temperature	0.0 C (32.0 F)	29 of 100 (Routine)
Marble Hill	United States	Record low minimum temperature	0.6 C (33.1 F)	29 of 100 (Routine)
Pawnee City	United States	Record low minimum temperature	0.0 C (32.0 F)	29 of 100 (Routine)
Lancaster	United States	Record daily precipitation	28.4 mm (1.1 in)	29 of 100 (Routine)
Merredin Research Station	Australia	Record low maximum temperature	13.0 C (55.4 F)	28 of 100 (Routine)
Nepisiguit Falls	Canada	Record low maximum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Centralia	United States	Record low minimum temperature	1.1 C (34.0 F)	28 of 100 (Routine)
Greensburg	United States	Record low minimum temperature	3.9 C (39.0 F)	28 of 100 (Routine)
McKinney Muni AP	United States	Record low maximum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
La Malbaie	Canada	Record low maximum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Milan	Italy	Record daily precipitation	40.4 mm (1.6 in)	27 of 100 (Routine)
Coldwater	United States	Record low minimum temperature	5.0 C (41.0 F)	27 of 100 (Routine)
Lincoln 1 SE	United States	Record low minimum temperature	1.7 C (35.1 F)	27 of 100 (Routine)
Wamego 4 W	United States	Record low minimum temperature	4.4 C (39.9 F)	27 of 100 (Routine)
Bloomingdale	United States	Record low maximum temperature	10.0 C (50.0 F)	27 of 100 (Routine)
Miami	United States	Record low minimum temperature	3.3 C (37.9 F)	27 of 100 (Routine)
Eagle	United States	Record high maximum temperature	20.0 C (68.0 F)	27 of 100 (Routine)

Counts by Type and Timescale

593 records

Records set or tied on 18 September 1973 by type: Highest daily maximum 40, Lowest daily maximum 174, Highest daily minimum 49, Lowest daily minimum 209, Heaviest daily rainfall 118, Heaviest daily snowfall 3.

Records on 18 September 1973 by type
Record type	Records
Highest daily maximum	40
Lowest daily maximum	174
Highest daily minimum	49
Lowest daily minimum	209
Heaviest daily rainfall	118
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 18 September 1973 by timescale: all-time 0, monthly 4, daily 589.

How Much Records Were Beaten By

465 broken records

Margins by which the 465 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 43.0. Ties are not counted.

Top 20 by Significance

18 September 1973

Top 20 records on 18 September 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1973	Genoa, IT	daily rain	61.8 mm (2.4 in)	23.1 mm (0.9 in)	137 years	50 of 100 (Notable)
18 September 1973	Morgantown Muni AP, US	daily low max	16.1 C (61.0 F)	1.1 C (2.0 F)	95 years	39 of 100 (Notable)
18 September 1973	Paragould, US	daily low max	17.8 C (64.0 F)	3.3 C (5.9 F)	70 years	37 of 100 (Notable)
18 September 1973	Sherman, US	daily low max	18.3 C (64.9 F)	3.9 C (7.0 F)	72 years	37 of 100 (Notable)
18 September 1973	Fazenda Sao Jeronimo, BR	monthly rain	42.0 mm (1.7 in)	20.6 mm (0.8 in)	7 years	36 of 100 (Notable)
18 September 1973	Chickamauga 2 SW, US	daily rain	36.1 mm (1.4 in)	10.7 mm (0.4 in)	78 years	36 of 100 (Notable)
18 September 1973	Willow Sprg Radio Kuku, US	daily low max	17.2 C (63.0 F)	2.8 C (5.0 F)	73 years	35 of 100 (Notable)
18 September 1973	Schenley Lock 5, US	daily rain	25.4 mm (1.0 in)	13.0 mm (0.5 in)	52 years	35 of 100 (Notable)
18 September 1973	Jonesboro 3 SSE, US	daily low max	19.4 C (66.9 F)	2.3 C (4.1 F)	72 years	34 of 100 (Routine)
18 September 1973	Garnett 1 E, US	daily low min	3.3 C (37.9 F)	5.0 C (9.0 F)	60 years	34 of 100 (Routine)
18 September 1973	Enosburg Falls, US	daily rain	43.2 mm (1.7 in)	6.1 mm (0.24 in)	68 years	34 of 100 (Routine)
18 September 1973	Rexton, CA	daily rain	42.2 mm (1.7 in)	26.7 mm (1.1 in)	26 years	33 of 100 (Routine)
18 September 1973	Marseille Obs. Palais-Lonchamp, FR	daily low max	18.0 C (64.4 F)	1.8 C (3.2 F)	67 years	33 of 100 (Routine)
18 September 1973	Tipton, US	daily low max	12.2 C (54.0 F)	2.2 C (4.0 F)	72 years	33 of 100 (Routine)
18 September 1973	Cottonwood Falls, US	daily low min	1.7 C (35.1 F)	4.4 C (7.9 F)	60 years	33 of 100 (Routine)
18 September 1973	Windsor, US	daily low max	13.3 C (55.9 F)	2.3 C (4.1 F)	72 years	33 of 100 (Routine)
18 September 1973	Fredonia, US	daily low min	3.3 C (37.9 F)	3.4 C (6.1 F)	60 years	32 of 100 (Routine)
18 September 1973	Red Cloud, US	daily low min	-1.1 C (30.0 F)	2.8 C (5.0 F)	72 years	32 of 100 (Routine)
18 September 1973	Eureka Springs 3 WNW, US	daily low min	3.3 C (37.9 F)	1.7 C (3.1 F)	70 years	31 of 100 (Routine)
18 September 1973	Antioch, US	daily low max	11.1 C (52.0 F)	1.7 C (3.1 F)	72 years	31 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

1803 to 1973

Records set or tied on this calendar date in each year from 1803 to 1973. 1973 had 593 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 1973-09-18: 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 10	436
10 to 20	19
20 to 30	6
30 to 40	3
40 to 50	1