Weather Records on 18 September 1993

747 weather records were set or tied worldwide on 18 September 1993. Highest significance: Valentia Observatory, IE.

Key Facts for 18 September 1993

On 18 September 1993, 747 weather records were set or tied at long-record stations worldwide.
149 were record highs and 477 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 736 daily.
Valentia Observatory set a monthly record daily precipitation of 94.3 mm (3.7 in) on 18 September 1993.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 419 records.

Record Map

747 stations

747 station records on 18 September 1993 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1993: highest significance records shown on the map
Station	Country	Type	Value	Significance
Valentia Observatory	Ireland	Record daily precipitation	94.3 mm (3.7 in)	65 of 100 (Major)
Oakley	United States	Record daily precipitation	37.1 mm (1.5 in)	62 of 100 (Major)
Mount Gambier Post Office	Australia	Record daily precipitation	26.9 mm (1.1 in)	55 of 100 (Notable)
Quinter	United States	Record daily precipitation	65.5 mm (2.6 in)	55 of 100 (Notable)
Nizhyn	Ukraine	Record daily precipitation	102.1 mm (4.0 in)	51 of 100 (Notable)
Pagosa Springs 1SE	United States	Record low minimum temperature	-12.8 C (9.0 F)	51 of 100 (Notable)
Chanchichimila	Mexico	Record daily precipitation	97.3 mm (3.8 in)	47 of 100 (Notable)
Dillon	United States	Record daily precipitation	62.2 mm (2.4 in)	46 of 100 (Notable)
Greenville	United States	Record daily precipitation	71.4 mm (2.8 in)	44 of 100 (Notable)
Hay Springs 12 S	United States	Record daily precipitation	31.8 mm (1.3 in)	42 of 100 (Notable)
Vestervig	Denmark	Record low minimum temperature	1.0 C (33.8 F)	41 of 100 (Notable)
Velikie Luki	Russia	Record low maximum temperature	6.3 C (43.3 F)	41 of 100 (Notable)
Lewisburg 3 N	United States	Record daily precipitation	35.6 mm (1.4 in)	41 of 100 (Notable)
Machilipatnam	India	Record daily precipitation	57.9 mm (2.3 in)	40 of 100 (Notable)
Waynesboro 2 S	United States	Record daily precipitation	53.3 mm (2.1 in)	40 of 100 (Notable)
Glenwood 2WNW	United States	Record low minimum temperature	-0.6 C (30.9 F)	40 of 100 (Notable)
Falun	Sweden	Record low minimum temperature	-3.4 C (25.9 F)	39 of 100 (Notable)
Torungen Fyr	Norway	Record low minimum temperature	3.0 C (37.4 F)	37 of 100 (Notable)
Stockholm	Sweden	Record low minimum temperature	2.2 C (36.0 F)	37 of 100 (Notable)
Imperial	United States	Record low minimum temperature	13.9 C (57.0 F)	37 of 100 (Notable)
Academy 2NE	United States	Record low maximum temperature	10.0 C (50.0 F)	37 of 100 (Notable)
Katanning Comparison	Australia	Record low maximum temperature	10.0 C (50.0 F)	36 of 100 (Notable)
Wuhan	China	Record daily precipitation	106.3 mm (4.2 in)	36 of 100 (Notable)
Anqing	China	Record daily precipitation	99.8 mm (3.9 in)	36 of 100 (Notable)
Escuintla (Dge)	Mexico	Record daily precipitation	140.5 mm (5.5 in)	36 of 100 (Notable)
Namiquipa	Mexico	Record low minimum temperature	1.7 C (35.1 F)	36 of 100 (Notable)
Santo Tomas (Cfe)	Mexico	Record daily precipitation	68.1 mm (2.7 in)	36 of 100 (Notable)
San Simon	United States	Record low minimum temperature	6.7 C (44.1 F)	35 of 100 (Notable)
Wasta	United States	Record daily precipitation	34.8 mm (1.4 in)	34 of 100 (Routine)
Felipe Carrillo Puerto (Obs)	Mexico	Record daily precipitation	74.8 mm (2.9 in)	33 of 100 (Routine)
Madera	Mexico	Record low minimum temperature	-1.1 C (30.0 F)	33 of 100 (Routine)
Villaflores (Smn)	Mexico	Record high minimum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Faerder Fyr	Norway	Record low minimum temperature	6.7 C (44.1 F)	32 of 100 (Routine)
Gulkana AP	United States	Record low minimum temperature	-10.0 C (14.0 F)	32 of 100 (Routine)
Mys Alevina	Russia	Record daily precipitation	29.9 mm (1.2 in)	31 of 100 (Routine)
Hull	United Kingdom	Record low minimum temperature	3.7 C (38.7 F)	31 of 100 (Routine)
Quartzsite	United States	Record low minimum temperature	13.9 C (57.0 F)	31 of 100 (Routine)
Shinjo	Japan	Record daily precipitation	81.0 mm (3.2 in)	30 of 100 (Routine)
Surat Thani	Thailand	Record low minimum temperature	20.7 C (69.3 F)	30 of 100 (Routine)
Brawley 2 SW	United States	Record low minimum temperature	13.3 C (55.9 F)	30 of 100 (Routine)
Plains SW Ga Exp STN	United States	Record daily precipitation	60.5 mm (2.4 in)	30 of 100 (Routine)
Warrenton 3 SE	United States	Record low maximum temperature	11.7 C (53.1 F)	30 of 100 (Routine)
Tanquian de Escobedo	Mexico	Record low minimum temperature	15.0 C (59.0 F)	29 of 100 (Routine)
Fajardo	Puerto Rico [United States]	Record low minimum temperature	15.6 C (60.1 F)	29 of 100 (Routine)
Lermontovka	Russia	Record daily precipitation	44.1 mm (1.7 in)	29 of 100 (Routine)
Tracy	United States	Record low maximum temperature	10.6 C (51.1 F)	29 of 100 (Routine)
Real del Monte	Mexico	Record high maximum temperature	28.9 C (84.0 F)	28 of 100 (Routine)
Mascota (Dge)	Mexico	Record high maximum temperature	37.8 C (100.0 F)	28 of 100 (Routine)
Felipe Carrillo Puerto (Dge)	Mexico	Record daily precipitation	64.8 mm (2.6 in)	28 of 100 (Routine)
Motul	Mexico	Record low maximum temperature	26.7 C (80.1 F)	28 of 100 (Routine)
Ellsworth	United States	Record daily precipitation	59.9 mm (2.4 in)	28 of 100 (Routine)
Changde	China	Record daily precipitation	50.0 mm (2.0 in)	27 of 100 (Routine)
Nanning	China	Record daily precipitation	47.6 mm (1.9 in)	27 of 100 (Routine)
Felipe Carrillo Puerto (Dge)	Mexico	Record low maximum temperature	25.0 C (77.0 F)	27 of 100 (Routine)
Niznij Novgorod	Russia	Record low maximum temperature	5.1 C (41.2 F)	27 of 100 (Routine)
Orebro	Sweden	Record low minimum temperature	-3.2 C (26.2 F)	27 of 100 (Routine)
Huoshan	China	Record daily precipitation	62.4 mm (2.5 in)	26 of 100 (Routine)
Qinzhou	China	Record daily precipitation	98.0 mm (3.9 in)	26 of 100 (Routine)
Felipe Carrillo Puerto (Obs)	Mexico	Record low maximum temperature	25.5 C (77.9 F)	26 of 100 (Routine)
Nuevo Casas Grandes (Dge)	Mexico	Record low minimum temperature	5.0 C (41.0 F)	26 of 100 (Routine)

Counts by Type and Timescale

747 records

Records set or tied on 18 September 1993 by type: Highest daily maximum 67, Lowest daily maximum 192, Highest daily minimum 82, Lowest daily minimum 285, Heaviest daily rainfall 119, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 18 September 1993 by type
Record type	Records
Highest daily maximum	67
Lowest daily maximum	192
Highest daily minimum	82
Lowest daily minimum	285
Heaviest daily rainfall	119
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 18 September 1993 by timescale: all-time 1, monthly 10, daily 736.

How Much Records Were Beaten By

563 broken records

Margins by which the 563 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 69.1. Ties are not counted.

Top 20 by Significance

18 September 1993

Top 20 records on 18 September 1993 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1993	Valentia Observatory, IE	monthly rain	94.3 mm (3.7 in)	34.8 mm (1.4 in)	35 years	65 of 100 (Major)
18 September 1993	Oakley, US	daily rain	37.1 mm (1.5 in)	22.9 mm (0.9 in)	44 years	62 of 100 (Major)
18 September 1993	Mount Gambier Post Office, AU	daily rain	26.9 mm (1.1 in)	11.2 mm (0.4 in)	80 years	55 of 100 (Notable)
18 September 1993	Quinter, US	daily rain	65.5 mm (2.6 in)	47.7 mm (1.9 in)	34 years	55 of 100 (Notable)
18 September 1993	Nizhyn, UA	all-time rain	102.1 mm (4.0 in)	13.7 mm (0.5 in)	19 years	51 of 100 (Notable)
18 September 1993	Pagosa Springs 1SE, US	monthly low min	-12.8 C (9.0 F)	3.4 C (6.1 F)	84 years	51 of 100 (Notable)
18 September 1993	Chanchichimila, MX	daily rain	97.3 mm (3.8 in)	69.1 mm (2.7 in)	12 years	47 of 100 (Notable)
18 September 1993	Dillon, US	daily rain	62.2 mm (2.4 in)	28.2 mm (1.1 in)	80 years	46 of 100 (Notable)
18 September 1993	Greenville, US	daily rain	71.4 mm (2.8 in)	30.0 mm (1.2 in)	64 years	44 of 100 (Notable)
18 September 1993	Hay Springs 12 S, US	daily rain	31.8 mm (1.3 in)	21.4 mm (0.8 in)	26 years	42 of 100 (Notable)
18 September 1993	Vestervig, DK	daily low min	1.0 C (33.8 F)	0.5 C (0.9 F)	115 years	41 of 100 (Notable)
18 September 1993	Velikie Luki, RU	daily low max	6.3 C (43.3 F)	1.2 C (2.2 F)	98 years	41 of 100 (Notable)
18 September 1993	Lewisburg 3 N, US	daily rain	35.6 mm (1.4 in)	8.7 mm (0.34 in)	80 years	41 of 100 (Notable)
18 September 1993	Machilipatnam, IN	daily rain	57.9 mm (2.3 in)	7.6 mm (0.30 in)	90 years	40 of 100 (Notable)
18 September 1993	Waynesboro 2 S, US	daily rain	53.3 mm (2.1 in)	7.6 mm (0.30 in)	87 years	40 of 100 (Notable)
18 September 1993	Glenwood 2WNW, US	daily low min	-0.6 C (30.9 F)	1.2 C (2.2 F)	96 years	40 of 100 (Notable)
18 September 1993	Falun, SE	daily low min	-3.4 C (25.9 F)	2.4 C (4.3 F)	83 years	39 of 100 (Notable)
18 September 1993	Torungen Fyr, NO	daily low min	3.0 C (37.4 F)	2.0 C (3.6 F)	75 years	37 of 100 (Notable)
18 September 1993	Stockholm, SE	daily low min	2.2 C (36.0 F)	1.3 C (2.3 F)	78 years	37 of 100 (Notable)
18 September 1993	Imperial, US	daily low min	13.9 C (57.0 F)	1.1 C (2.0 F)	88 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 1993

Records set or tied on this calendar date in each year from 1803 to 1993. 1993 had 747 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 1993-09-18: 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	516
10 to 20	22
20 to 30	9
30 to 40	11
40 to 50	3
50 to 60	0
60 to 70	2