Weather Records on 20 September 2018

1,020 weather records were set or tied worldwide on 20 September 2018. Highest significance: Arivaca, US.

Key Facts for 20 September 2018

On 20 September 2018, 1,020 weather records were set or tied at long-record stations worldwide.
713 were record highs and 85 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 18 monthly and 1,000 daily.
Arivaca set a daily record precipitation of 62.2 mm (2.4 in) on 20 September 2018.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 438 records.

Record Map

1,020 stations

1,020 station records on 20 September 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Arivaca	United States	Record daily precipitation	62.2 mm (2.4 in)	80 of 100 (Exceptional)
Sheldon	United States	Record daily precipitation	134.6 mm (5.3 in)	80 of 100 (Exceptional)
Forest City 2 NNE	United States	Record daily precipitation	109.7 mm (4.3 in)	78 of 100 (Major)
Menno	United States	Record daily precipitation	74.7 mm (2.9 in)	75 of 100 (Major)
Newell	United States	Record daily precipitation	53.3 mm (2.1 in)	74 of 100 (Major)
Rock Rapids	United States	Record daily precipitation	88.9 mm (3.5 in)	72 of 100 (Major)
Fayette	United States	Record daily precipitation	94.0 mm (3.7 in)	70 of 100 (Major)
Spencer 1 N	United States	Record daily precipitation	99.8 mm (3.9 in)	70 of 100 (Major)
Spirit Lake	United States	Record daily precipitation	97.8 mm (3.9 in)	69 of 100 (Major)
Milford 4 NW	United States	Record daily precipitation	74.9 mm (2.9 in)	68 of 100 (Major)
Mullen 3S	United States	Record daily precipitation	68.3 mm (2.7 in)	68 of 100 (Major)
Marion	United States	Record daily precipitation	89.7 mm (3.5 in)	67 of 100 (Major)
Lake Park 3SSE	United States	Record daily precipitation	100.3 mm (3.9 in)	66 of 100 (Major)
Bridgewater	United States	Record daily precipitation	77.5 mm (3.1 in)	66 of 100 (Major)
Elkader 6 SSW	United States	Record daily precipitation	77.0 mm (3.0 in)	65 of 100 (Major)
Primghar	United States	Record daily precipitation	121.9 mm (4.8 in)	65 of 100 (Major)
Bowdle	United States	Record daily precipitation	48.0 mm (1.9 in)	64 of 100 (Major)
Montrose	United States	Record daily precipitation	93.2 mm (3.7 in)	62 of 100 (Major)
High Mowthorpe	United Kingdom	Record daily precipitation	52.2 mm (2.1 in)	59 of 100 (Notable)
Kjahta	Russia	Record daily precipitation	40.2 mm (1.6 in)	56 of 100 (Notable)
Postville	United States	Record daily precipitation	67.8 mm (2.7 in)	56 of 100 (Notable)
Savage	United States	Record daily precipitation	25.9 mm (1.0 in)	56 of 100 (Notable)
Willcox	United States	Record daily precipitation	38.9 mm (1.5 in)	54 of 100 (Notable)
New Hope	United States	Record daily precipitation	114.8 mm (4.5 in)	53 of 100 (Notable)
Lancaster 4 WSW	United States	Record daily precipitation	78.7 mm (3.1 in)	53 of 100 (Notable)
Sanborn	United States	Record daily precipitation	163.6 mm (6.4 in)	51 of 100 (Notable)
Minneapolis-St Paul Intl AP	United States	Record daily precipitation	83.3 mm (3.3 in)	51 of 100 (Notable)
Redwood Falls Muni AP	United States	Record daily precipitation	45.2 mm (1.8 in)	51 of 100 (Notable)
Zakatala	Azerbaijan	Record daily precipitation	99.3 mm (3.9 in)	49 of 100 (Notable)
Sioux Rapids	United States	Record daily precipitation	117.1 mm (4.6 in)	49 of 100 (Notable)
Tularosa	United States	Record daily precipitation	41.4 mm (1.6 in)	49 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	30.2 mm (1.2 in)	48 of 100 (Notable)
Darlington Wwtp	United States	Record daily precipitation	78.7 mm (3.1 in)	48 of 100 (Notable)
Marshall	United States	Record daily precipitation	56.4 mm (2.2 in)	46 of 100 (Notable)
Montevideo 1SW	United States	Record daily precipitation	34.3 mm (1.4 in)	46 of 100 (Notable)
Tracy	United States	Record daily precipitation	80.8 mm (3.2 in)	46 of 100 (Notable)
Broken Bow 2 W	United States	Record daily precipitation	43.9 mm (1.7 in)	46 of 100 (Notable)
Hancock Houghton Co AP	United States	Record daily precipitation	43.4 mm (1.7 in)	46 of 100 (Notable)
Tripoli	United States	Record daily precipitation	84.3 mm (3.3 in)	45 of 100 (Notable)
Bredette	United States	Record daily precipitation	29.7 mm (1.2 in)	45 of 100 (Notable)
Vida 6 NE	United States	Record daily precipitation	36.1 mm (1.4 in)	45 of 100 (Notable)
Gogland	Russia	Record high maximum temperature	19.2 C (66.6 F)	44 of 100 (Notable)
Alwen	United Kingdom	Record daily precipitation	53.2 mm (2.1 in)	44 of 100 (Notable)
Sibley	United States	Record daily precipitation	73.4 mm (2.9 in)	44 of 100 (Notable)
Terry	United States	Record daily precipitation	29.2 mm (1.1 in)	44 of 100 (Notable)
Atkinson 3SW	United States	Record daily precipitation	82.0 mm (3.2 in)	44 of 100 (Notable)
Milwaukee Mitchell AP	United States	Record daily precipitation	54.1 mm (2.1 in)	44 of 100 (Notable)
Milesovka	Czech Republic	Record high minimum temperature	17.8 C (64.0 F)	43 of 100 (Notable)
Hampton	United States	Record daily precipitation	124.5 mm (4.9 in)	43 of 100 (Notable)
Pipestone	United States	Record daily precipitation	73.7 mm (2.9 in)	43 of 100 (Notable)
Raymond Border STN	United States	Record daily precipitation	25.4 mm (1.0 in)	43 of 100 (Notable)
Mobridge 2NNW	United States	Record daily precipitation	48.0 mm (1.9 in)	43 of 100 (Notable)
Tyndall	United States	Record daily precipitation	83.8 mm (3.3 in)	43 of 100 (Notable)
Grand Rapids	United States	Record daily precipitation	69.1 mm (2.7 in)	42 of 100 (Notable)
Parnu	Estonia	Record high minimum temperature	14.5 C (58.1 F)	41 of 100 (Notable)
Pte de la Hague	France	Record high minimum temperature	17.5 C (63.5 F)	41 of 100 (Notable)
Hardy	United States	Record high minimum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Rockville	United States	Record high maximum temperature	34.4 C (93.9 F)	41 of 100 (Notable)
Allerton	United States	Record high minimum temperature	18.9 C (66.0 F)	41 of 100 (Notable)
Clarinda	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)

Counts by Type and Timescale

1,020 records

Records set or tied on 20 September 2018 by type: Highest daily maximum 337, Lowest daily maximum 38, Highest daily minimum 376, Lowest daily minimum 47, Heaviest daily rainfall 222.

Records on 20 September 2018 by type
Record type	Records
Highest daily maximum	337
Lowest daily maximum	38
Highest daily minimum	376
Lowest daily minimum	47
Heaviest daily rainfall	222
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 2018 by timescale: all-time 2, monthly 18, daily 1,000.

How Much Records Were Beaten By

814 broken records

Margins by which the 814 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 87.1. Ties are not counted.

Top 20 by Significance

20 September 2018

Top 20 records on 20 September 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 2018	Arivaca, US	daily rain	62.2 mm (2.4 in)	56.1 mm (2.2 in)	100 years	80 of 100 (Exceptional)
20 September 2018	Sheldon, US	daily rain	134.6 mm (5.3 in)	69.1 mm (2.7 in)	116 years	80 of 100 (Exceptional)
20 September 2018	Forest City 2 NNE, US	daily rain	109.7 mm (4.3 in)	69.8 mm (2.7 in)	95 years	78 of 100 (Major)
20 September 2018	Menno, US	daily rain	74.7 mm (2.9 in)	44.2 mm (1.7 in)	116 years	75 of 100 (Major)
20 September 2018	Newell, US	daily rain	53.3 mm (2.1 in)	42.4 mm (1.7 in)	84 years	74 of 100 (Major)
20 September 2018	Rock Rapids, US	daily rain	88.9 mm (3.5 in)	50.8 mm (2.0 in)	95 years	72 of 100 (Major)
20 September 2018	Fayette, US	daily rain	94.0 mm (3.7 in)	43.2 mm (1.7 in)	95 years	70 of 100 (Major)
20 September 2018	Spencer 1 N, US	daily rain	99.8 mm (3.9 in)	46.5 mm (1.8 in)	95 years	70 of 100 (Major)
20 September 2018	Spirit Lake, US	daily rain	97.8 mm (3.9 in)	87.1 mm (3.4 in)	64 years	69 of 100 (Major)
20 September 2018	Milford 4 NW, US	daily rain	74.9 mm (2.9 in)	46.5 mm (1.8 in)	95 years	68 of 100 (Major)
20 September 2018	Mullen 3S, US	daily rain	68.3 mm (2.7 in)	38.6 mm (1.5 in)	68 years	68 of 100 (Major)
20 September 2018	Marion, US	daily rain	89.7 mm (3.5 in)	63.0 mm (2.5 in)	56 years	67 of 100 (Major)
20 September 2018	Lake Park 3SSE, US	daily rain	100.3 mm (3.9 in)	66.0 mm (2.6 in)	53 years	66 of 100 (Major)
20 September 2018	Bridgewater, US	daily rain	77.5 mm (3.1 in)	52.6 mm (2.1 in)	68 years	66 of 100 (Major)
20 September 2018	Elkader 6 SSW, US	daily rain	77.0 mm (3.0 in)	43.5 mm (1.7 in)	69 years	65 of 100 (Major)
20 September 2018	Primghar, US	daily rain	121.9 mm (4.8 in)	53.3 mm (2.1 in)	68 years	65 of 100 (Major)
20 September 2018	Bowdle, US	daily rain	48.0 mm (1.9 in)	27.9 mm (1.1 in)	69 years	64 of 100 (Major)
20 September 2018	Montrose, US	monthly rain	93.2 mm (3.7 in)	35.8 mm (1.4 in)	55 years	62 of 100 (Major)
20 September 2018	High Mowthorpe, GB	daily rain	52.2 mm (2.1 in)	32.4 mm (1.3 in)	49 years	59 of 100 (Notable)
20 September 2018	Kjahta, RU	daily rain	40.2 mm (1.6 in)	18.3 mm (0.7 in)	56 years	56 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

1812 to 2018

Records set or tied on this calendar date in each year from 1812 to 2018. 2018 had 1,020 records.

Counts for years before the ledger starts come from the same station rules.

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 2018-09-20: 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	761
20 to 40	34
40 to 60	14
60 to 80	4
80 to 100	1