Weather Records on 18 September 1989

778 weather records were set or tied worldwide on 18 September 1989. Highest significance: New Meadows Rs, US.

Key Facts for 18 September 1989

On 18 September 1989, 778 weather records were set or tied at long-record stations worldwide.
395 were record highs and 197 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 21 monthly and 755 daily.
New Meadows Rs set a daily record precipitation of 45.0 mm (1.8 in) on 18 September 1989.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 419 records.

Record Map

778 stations

778 station records on 18 September 1989 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1989: highest significance records shown on the map
Station	Country	Type	Value	Significance
New Meadows Rs	United States	Record daily precipitation	45.0 mm (1.8 in)	62 of 100 (Major)
San Juan L M Marin Intl AP	Puerto Rico [United States]	Record daily precipitation	224.5 mm (8.8 in)	59 of 100 (Notable)
Porto	Brazil	Record daily precipitation	63.7 mm (2.5 in)	57 of 100 (Notable)
Juncos 1 SE	Puerto Rico [United States]	Record daily precipitation	148.3 mm (5.8 in)	57 of 100 (Notable)
Paraiso	Puerto Rico [United States]	Record daily precipitation	269.2 mm (10.6 in)	51 of 100 (Notable)
Canovanas	Puerto Rico [United States]	Record daily precipitation	78.7 mm (3.1 in)	50 of 100 (Notable)
Humacao 2 SSE	Puerto Rico [United States]	Record daily precipitation	142.2 mm (5.6 in)	50 of 100 (Notable)
Andarai	Brazil	Record daily precipitation	83.5 mm (3.3 in)	48 of 100 (Notable)
Cedarville	United States	Record daily precipitation	34.8 mm (1.4 in)	48 of 100 (Notable)
Saint Ignatius	United States	Record daily precipitation	35.6 mm (1.4 in)	48 of 100 (Notable)
Keno	United States	Record daily precipitation	35.1 mm (1.4 in)	47 of 100 (Notable)
Snake Creek Powerhouse	United States	Record daily precipitation	34.3 mm (1.4 in)	45 of 100 (Notable)
Cidra 1 E	Puerto Rico [United States]	Record daily precipitation	101.6 mm (4.0 in)	43 of 100 (Notable)
T Uleniy-Ostrov	Russia	Record daily precipitation	30.7 mm (1.2 in)	40 of 100 (Notable)
Roseau	United States	Record high minimum temperature	19.4 C (66.9 F)	40 of 100 (Notable)
Coimbatore/Peelamed	India	Record daily precipitation	47.2 mm (1.9 in)	38 of 100 (Notable)
Aneth Plt	United States	Record high minimum temperature	19.4 C (66.9 F)	38 of 100 (Notable)
Fargo Hector Intl AP	United States	Record high maximum temperature	31.1 C (88.0 F)	38 of 100 (Notable)
Los Gatos	United States	Record low maximum temperature	18.9 C (66.0 F)	37 of 100 (Notable)
Placerville Ifg	United States	Record daily precipitation	57.2 mm (2.3 in)	37 of 100 (Notable)
Twin Lakes	United States	Record daily snowfall	5.1 cm (2.0 in)	37 of 100 (Notable)
Volta Ph	United States	Record daily precipitation	44.2 mm (1.7 in)	37 of 100 (Notable)
Langdon Exp Farm	United States	Record high minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Colfax	United States	Record low maximum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Placerville	United States	Record daily precipitation	44.2 mm (1.7 in)	36 of 100 (Notable)
Roseau	United States	Record high maximum temperature	30.6 C (87.1 F)	36 of 100 (Notable)
Selby	United States	Record high minimum temperature	18.9 C (66.0 F)	36 of 100 (Notable)
Portland	Australia	Record daily precipitation	25.8 mm (1.0 in)	35 of 100 (Notable)
Titusville	United States	Record high maximum temperature	35.0 C (95.0 F)	35 of 100 (Notable)
Grand Forks UNIV (NWS)	United States	Record high minimum temperature	18.3 C (64.9 F)	35 of 100 (Notable)
New England	United States	Record high minimum temperature	15.6 C (60.1 F)	35 of 100 (Notable)
Kumejima	Japan	Record daily precipitation	124.0 mm (4.9 in)	34 of 100 (Routine)
Healdsburg	United States	Record low maximum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Stephan 2 NW	United States	Record high minimum temperature	16.7 C (62.1 F)	34 of 100 (Routine)
Spicer	United States	Record high minimum temperature	8.9 C (48.0 F)	33 of 100 (Routine)
Glendive	United States	Record high maximum temperature	35.0 C (95.0 F)	33 of 100 (Routine)
Intl Falls Intl AP	United States	Record high minimum temperature	17.2 C (63.0 F)	33 of 100 (Routine)
Kobuleti	Georgia	Record daily precipitation	99.6 mm (3.9 in)	32 of 100 (Routine)
Ixtacamaxtitlan (Cfe)	Mexico	Record daily precipitation	31.0 mm (1.2 in)	32 of 100 (Routine)
Apizaco	Mexico	Record high minimum temperature	15.6 C (60.1 F)	32 of 100 (Routine)
Mata de Limones	Mexico	Record daily precipitation	62.0 mm (2.4 in)	32 of 100 (Routine)
Saint Helena	United States	Record low maximum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
Ada	United States	Record high minimum temperature	20.6 C (69.1 F)	32 of 100 (Routine)
Red Lake Falls	United States	Record high minimum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Park River	United States	Record high maximum temperature	33.9 C (93.0 F)	32 of 100 (Routine)
Devils Lake Kdlr	United States	Record high minimum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Tres Brazos	Mexico	Record daily precipitation	79.2 mm (3.1 in)	31 of 100 (Routine)
Baudette	United States	Record high minimum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Wangerooge	Germany	Record high maximum temperature	25.8 C (78.4 F)	30 of 100 (Routine)
Bremerhaven	Germany	Record high maximum temperature	26.8 C (80.2 F)	30 of 100 (Routine)
San Miguel Ejutla	Mexico	Record low minimum temperature	11.7 C (53.1 F)	30 of 100 (Routine)
Reus/Aeropuerto	Spain	Record daily precipitation	59.2 mm (2.3 in)	30 of 100 (Routine)
Fullerton 1 ESE	United States	Record high minimum temperature	18.3 C (64.9 F)	30 of 100 (Routine)
Wahpeton 3 N	United States	Record high minimum temperature	18.3 C (64.9 F)	30 of 100 (Routine)
Westhope	United States	Record high maximum temperature	33.3 C (91.9 F)	30 of 100 (Routine)
Norderney	Germany	Record high maximum temperature	26.1 C (79.0 F)	29 of 100 (Routine)
Sankt Peter-Ording	Germany	Record high maximum temperature	24.5 C (76.1 F)	29 of 100 (Routine)
Eelde	Netherlands	Record high maximum temperature	26.9 C (80.4 F)	29 of 100 (Routine)
De Bilt	Netherlands	Record high maximum temperature	26.7 C (80.1 F)	29 of 100 (Routine)
Placerville	United States	Record low maximum temperature	17.8 C (64.0 F)	29 of 100 (Routine)

Counts by Type and Timescale

778 records

Records set or tied on 18 September 1989 by type: Highest daily maximum 198, Lowest daily maximum 153, Highest daily minimum 197, Lowest daily minimum 44, Heaviest daily rainfall 185, Heaviest daily snowfall 1.

Records on 18 September 1989 by type
Record type	Records
Highest daily maximum	198
Lowest daily maximum	153
Highest daily minimum	197
Lowest daily minimum	44
Heaviest daily rainfall	185
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 18 September 1989 by timescale: all-time 2, monthly 21, daily 755.

How Much Records Were Beaten By

612 broken records

Margins by which the 612 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 231.1. Ties are not counted.

Top 20 by Significance

18 September 1989

Top 20 records on 18 September 1989 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1989	New Meadows Rs, US	daily rain	45.0 mm (1.8 in)	36.6 mm (1.4 in)	48 years	62 of 100 (Major)
18 September 1989	San Juan L M Marin Intl AP, PR	all-time rain	224.5 mm (8.8 in)	44.2 mm (1.7 in)	1 year	59 of 100 (Notable)
18 September 1989	Porto, BR	daily rain	63.7 mm (2.5 in)	48.7 mm (1.9 in)	46 years	57 of 100 (Notable)
18 September 1989	Juncos 1 SE, PR	daily rain	148.3 mm (5.8 in)	86.1 mm (3.4 in)	42 years	57 of 100 (Notable)
18 September 1989	Paraiso, PR	daily rain	269.2 mm (10.6 in)	231.1 mm (9.1 in)	28 years	51 of 100 (Notable)
18 September 1989	Canovanas, PR	daily rain	78.7 mm (3.1 in)	49.5 mm (1.9 in)	26 years	50 of 100 (Notable)
18 September 1989	Humacao 2 SSE, PR	daily rain	142.2 mm (5.6 in)	82.5 mm (3.2 in)	28 years	50 of 100 (Notable)
18 September 1989	Andarai, BR	monthly rain	83.5 mm (3.3 in)	24.7 mm (1.0 in)	21 years	48 of 100 (Notable)
18 September 1989	Cedarville, US	monthly rain	34.8 mm (1.4 in)	7.4 mm (0.29 in)	37 years	48 of 100 (Notable)
18 September 1989	Saint Ignatius, US	daily rain	35.6 mm (1.4 in)	16.5 mm (0.6 in)	42 years	48 of 100 (Notable)
18 September 1989	Keno, US	daily rain	35.1 mm (1.4 in)	19.6 mm (0.8 in)	28 years	47 of 100 (Notable)
18 September 1989	Snake Creek Powerhouse, US	daily rain	34.3 mm (1.4 in)	12.5 mm (0.5 in)	64 years	45 of 100 (Notable)
18 September 1989	Cidra 1 E, PR	daily rain	101.6 mm (4.0 in)	44.4 mm (1.7 in)	40 years	43 of 100 (Notable)
18 September 1989	T Uleniy-Ostrov, RU	monthly rain	30.7 mm (1.2 in)	9.9 mm (0.39 in)	19 years	40 of 100 (Notable)
18 September 1989	Roseau, US	daily high min	19.4 C (66.9 F)	5.5 C (9.9 F)	72 years	40 of 100 (Notable)
18 September 1989	Coimbatore/Peelamed, IN	daily rain	47.2 mm (1.9 in)	44.2 mm (1.7 in)	20 years	38 of 100 (Notable)
18 September 1989	Aneth Plt, US	daily high min	19.4 C (66.9 F)	2.2 C (4.0 F)	82 years	38 of 100 (Notable)
18 September 1989	Fargo Hector Intl AP, US	daily high max	31.1 C (88.0 F)	0.3 C (0.5 F)	97 years	38 of 100 (Notable)
18 September 1989	Los Gatos, US	daily low max	18.9 C (66.0 F)	0.5 C (0.9 F)	92 years	37 of 100 (Notable)
18 September 1989	Placerville Ifg, US	daily rain	57.2 mm (2.3 in)	34.6 mm (1.4 in)	30 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 1989

Records set or tied on this calendar date in each year from 1803 to 1989. 1989 had 778 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 1989-09-18: 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	606
50 to 100	5
100 to 150	0
150 to 200	0
200 to 250	1