Weather Records on 18 September 1988

997 weather records were set or tied worldwide on 18 September 1988. Highest significance: Munday, US.

Key Facts for 18 September 1988

On 18 September 1988, 997 weather records were set or tied at long-record stations worldwide.
402 were record highs and 184 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 39 monthly and 955 daily.
Munday set a monthly record daily precipitation of 176.8 mm (7.0 in) on 18 September 1988.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 418 records.

Record Map

997 stations

997 station records on 18 September 1988 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1988: highest significance records shown on the map
Station	Country	Type	Value	Significance
Munday	United States	Record daily precipitation	176.8 mm (7.0 in)	72 of 100 (Major)
Wichita Mtn Wr	United States	Record daily precipitation	218.4 mm (8.6 in)	66 of 100 (Major)
Giffard	Australia	Record daily precipitation	34.0 mm (1.3 in)	65 of 100 (Major)
Carnegie 5 NE	United States	Record daily precipitation	146.3 mm (5.8 in)	60 of 100 (Major)
Sanderson	United States	Record daily precipitation	127.8 mm (5.0 in)	57 of 100 (Notable)
Williston Sloulin Fld	United States	Record daily precipitation	32.0 mm (1.3 in)	52 of 100 (Notable)
Butchers Ridge	Australia	Record daily precipitation	53.4 mm (2.1 in)	51 of 100 (Notable)
Outtrim	Australia	Record daily precipitation	39.0 mm (1.5 in)	51 of 100 (Notable)
Haskell	United States	Record daily precipitation	82.6 mm (3.3 in)	49 of 100 (Notable)
Childress Muni AP	United States	Record daily precipitation	68.3 mm (2.7 in)	49 of 100 (Notable)
Cold Bay AP	United States	Record daily precipitation	47.0 mm (1.9 in)	49 of 100 (Notable)
Nicholson (Yendalock)	Australia	Record daily precipitation	52.0 mm (2.0 in)	48 of 100 (Notable)
Leting	China	Record daily precipitation	41.3 mm (1.6 in)	48 of 100 (Notable)
Ft Stockton	United States	Record daily precipitation	108.7 mm (4.3 in)	48 of 100 (Notable)
Wellington	United States	Record daily precipitation	90.7 mm (3.6 in)	48 of 100 (Notable)
Denton	United States	Record daily precipitation	49.5 mm (1.9 in)	47 of 100 (Notable)
Ackerly 4SE	United States	Record daily precipitation	95.3 mm (3.8 in)	47 of 100 (Notable)
Benbrook Dam	United States	Record daily precipitation	71.1 mm (2.8 in)	47 of 100 (Notable)
Nevertire (Beverley)	Australia	Record daily precipitation	32.2 mm (1.3 in)	46 of 100 (Notable)
Itanhaem	Brazil	Record daily precipitation	74.7 mm (2.9 in)	46 of 100 (Notable)
Isabela Substn	Puerto Rico [United States]	Record low minimum temperature	14.4 C (57.9 F)	46 of 100 (Notable)
Kremlin	United States	Record daily precipitation	41.7 mm (1.6 in)	46 of 100 (Notable)
East Sale Airport	Australia	Record daily precipitation	38.0 mm (1.5 in)	45 of 100 (Notable)
Independence	United States	Record daily precipitation	78.2 mm (3.1 in)	45 of 100 (Notable)
Willow Sprg Radio Kuku	United States	Record high minimum temperature	25.0 C (77.0 F)	45 of 100 (Notable)
Kanalohuluhulu 1075	United States	Record low maximum temperature	13.3 C (55.9 F)	45 of 100 (Notable)
Aberdeen	United States	Record daily precipitation	41.7 mm (1.6 in)	45 of 100 (Notable)
Cairo 3N	United States	Record daily precipitation	68.6 mm (2.7 in)	45 of 100 (Notable)
Nowa Nowa	Australia	Record daily precipitation	56.0 mm (2.2 in)	44 of 100 (Notable)
Inverloch	Australia	Record daily precipitation	25.0 mm (1.0 in)	44 of 100 (Notable)
Woodside (Lake View)	Australia	Record daily precipitation	42.0 mm (1.7 in)	44 of 100 (Notable)
Darriman (Tarralangi)	Australia	Record daily precipitation	33.0 mm (1.3 in)	44 of 100 (Notable)
Ellenburg Depot	United States	Record daily precipitation	44.7 mm (1.8 in)	44 of 100 (Notable)
Boggabri (Penryn)	Australia	Record daily precipitation	30.6 mm (1.2 in)	43 of 100 (Notable)
Joinville (Rvpsc)	Brazil	Record daily precipitation	56.8 mm (2.2 in)	43 of 100 (Notable)
Tapirai	Brazil	Record daily precipitation	59.2 mm (2.3 in)	43 of 100 (Notable)
Pedro de Toledo	Brazil	Record daily precipitation	55.4 mm (2.2 in)	43 of 100 (Notable)
Ft Benton	United States	Record daily precipitation	36.8 mm (1.4 in)	43 of 100 (Notable)
Galata 16 SW	United States	Record daily precipitation	40.6 mm (1.6 in)	43 of 100 (Notable)
Shonkin 7 S	United States	Record daily snowfall	15.2 cm (6.0 in)	43 of 100 (Notable)
Bukalong Station	Australia	Record daily precipitation	40.6 mm (1.6 in)	42 of 100 (Notable)
Holter Dam	United States	Record daily precipitation	36.8 mm (1.4 in)	42 of 100 (Notable)
Powers Lake 1N	United States	Record daily precipitation	30.5 mm (1.2 in)	42 of 100 (Notable)
Frogmore	Australia	Record daily precipitation	27.8 mm (1.1 in)	41 of 100 (Notable)
Gabo Island Lighthouse	Australia	Record daily precipitation	57.2 mm (2.3 in)	41 of 100 (Notable)
Tianjin	China	Record daily precipitation	41.4 mm (1.6 in)	41 of 100 (Notable)
Tenosique (Smn)	Mexico	Record high minimum temperature	25.6 C (78.1 F)	41 of 100 (Notable)
Ponca City Muni AP	United States	Record daily precipitation	95.3 mm (3.8 in)	41 of 100 (Notable)
Moe Gippsland Water	Australia	Record daily precipitation	32.8 mm (1.3 in)	40 of 100 (Notable)
Orland	United States	Record low minimum temperature	5.6 C (42.1 F)	40 of 100 (Notable)
Savage	United States	Record daily precipitation	44.2 mm (1.7 in)	40 of 100 (Notable)
Huron Rgnl AP	United States	Record daily precipitation	47.5 mm (1.9 in)	40 of 100 (Notable)
Mankato	United States	Record high minimum temperature	20.0 C (68.0 F)	39 of 100 (Notable)
Clemson UNIV	United States	Record low maximum temperature	18.3 C (64.9 F)	39 of 100 (Notable)
Harper 3ENE	United States	Record daily precipitation	26.4 mm (1.0 in)	39 of 100 (Notable)
Wonthaggi	Australia	Record daily precipitation	38.2 mm (1.5 in)	38 of 100 (Notable)
Gagnoa	Cote D'Ivoire	Record daily precipitation	87.9 mm (3.5 in)	38 of 100 (Notable)
El Rodeo	Mexico	Record daily precipitation	84.3 mm (3.3 in)	38 of 100 (Notable)
Jalacingo	Mexico	Record high maximum temperature	28.9 C (84.0 F)	38 of 100 (Notable)
Jhb-Norwood	South Africa	Record daily precipitation	29.5 mm (1.2 in)	38 of 100 (Notable)

Counts by Type and Timescale

997 records

Records set or tied on 18 September 1988 by type: Highest daily maximum 136, Lowest daily maximum 79, Highest daily minimum 266, Lowest daily minimum 105, Heaviest daily rainfall 394, Heaviest daily snowfall 9, Deepest snow cover 8.

Records on 18 September 1988 by type
Record type	Records
Highest daily maximum	136
Lowest daily maximum	79
Highest daily minimum	266
Lowest daily minimum	105
Heaviest daily rainfall	394
Heaviest daily snowfall	9
Deepest snow cover	8

Records on 18 September 1988 by timescale: all-time 3, monthly 39, daily 955.

How Much Records Were Beaten By

757 broken records

Margins by which the 757 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 152.0. Ties are not counted.

Top 20 by Significance

18 September 1988

Top 20 records on 18 September 1988 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1988	Munday, US	monthly rain	176.8 mm (7.0 in)	87.9 mm (3.5 in)	52 years	72 of 100 (Major)
18 September 1988	Wichita Mtn Wr, US	all-time rain	218.4 mm (8.6 in)	40.6 mm (1.6 in)	57 years	66 of 100 (Major)
18 September 1988	Giffard, AU	daily rain	34.0 mm (1.3 in)	21.3 mm (0.8 in)	64 years	65 of 100 (Major)
18 September 1988	Carnegie 5 NE, US	daily rain	146.3 mm (5.8 in)	70.1 mm (2.8 in)	65 years	60 of 100 (Major)
18 September 1988	Sanderson, US	monthly rain	127.8 mm (5.0 in)	19.8 mm (0.8 in)	87 years	57 of 100 (Notable)
18 September 1988	Williston Sloulin Fld, US	daily rain	32.0 mm (1.3 in)	11.9 mm (0.5 in)	80 years	52 of 100 (Notable)
18 September 1988	Butchers Ridge, AU	daily rain	53.4 mm (2.1 in)	33.6 mm (1.3 in)	30 years	51 of 100 (Notable)
18 September 1988	Outtrim, AU	daily rain	39.0 mm (1.5 in)	11.1 mm (0.4 in)	94 years	51 of 100 (Notable)
18 September 1988	Haskell, US	daily rain	82.6 mm (3.3 in)	39.4 mm (1.6 in)	64 years	49 of 100 (Notable)
18 September 1988	Childress Muni AP, US	daily rain	68.3 mm (2.7 in)	53.1 mm (2.1 in)	23 years	49 of 100 (Notable)
18 September 1988	Cold Bay AP, US	daily rain	47.0 mm (1.9 in)	33.8 mm (1.3 in)	22 years	49 of 100 (Notable)
18 September 1988	Nicholson (Yendalock), AU	daily rain	52.0 mm (2.0 in)	36.4 mm (1.4 in)	2 years	48 of 100 (Notable)
18 September 1988	Leting, CN	daily rain	41.3 mm (1.6 in)	34.9 mm (1.4 in)	29 years	48 of 100 (Notable)
18 September 1988	Ft Stockton, US	monthly rain	108.7 mm (4.3 in)	38.1 mm (1.5 in)	15 years	48 of 100 (Notable)
18 September 1988	Wellington, US	monthly rain	90.7 mm (3.6 in)	14.5 mm (0.6 in)	76 years	48 of 100 (Notable)
18 September 1988	Denton, US	daily rain	49.5 mm (1.9 in)	21.1 mm (0.8 in)	31 years	47 of 100 (Notable)
18 September 1988	Ackerly 4SE, US	daily rain	95.3 mm (3.8 in)	82.6 mm (3.3 in)	12 years	47 of 100 (Notable)
18 September 1988	Benbrook Dam, US	daily rain	71.1 mm (2.8 in)	63.0 mm (2.5 in)	22 years	47 of 100 (Notable)
18 September 1988	Nevertire (Beverley), AU	daily rain	32.2 mm (1.3 in)	6.0 mm (0.24 in)	98 years	46 of 100 (Notable)
18 September 1988	Itanhaem, BR	daily rain	74.7 mm (2.9 in)	59.7 mm (2.4 in)	5 years	46 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 1988

Records set or tied on this calendar date in each year from 1803 to 1988. 1988 had 997 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 1988-09-18: 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	663
20 to 40	67
40 to 60	20
60 to 80	4
80 to 100	2
100 to 120	0
120 to 140	0
140 to 160	1