Weather Records on 21 September 2018

1,051 weather records were set or tied worldwide on 21 September 2018. Highest significance: Milford 4 NW, US.

Key Facts for 21 September 2018

On 21 September 2018, 1,051 weather records were set or tied at long-record stations worldwide.
758 were record highs and 53 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 17 monthly and 1,033 daily.
Milford 4 NW set a daily record precipitation of 114.3 mm (4.5 in) on 21 September 2018.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 447 records.

Record Map

1,051 stations

1,051 station records on 21 September 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Milford 4 NW	United States	Record daily precipitation	114.3 mm (4.5 in)	67 of 100 (Major)
Washta	United States	Record daily precipitation	81.3 mm (3.2 in)	66 of 100 (Major)
St Croix Falls	United States	Record daily precipitation	121.9 mm (4.8 in)	63 of 100 (Major)
Winter	United States	Record daily precipitation	97.3 mm (3.8 in)	63 of 100 (Major)
Ashley	United States	Record daily precipitation	53.3 mm (2.1 in)	62 of 100 (Major)
Napoleon	United States	Record daily precipitation	36.1 mm (1.4 in)	62 of 100 (Major)
Eureka	United States	Record daily precipitation	43.4 mm (1.7 in)	58 of 100 (Notable)
Kumamoto	Japan	Record daily precipitation	138.4 mm (5.4 in)	54 of 100 (Notable)
Poteet	United States	Record high minimum temperature	32.8 C (91.0 F)	54 of 100 (Notable)
Balasore	India	Record daily precipitation	141.0 mm (5.6 in)	53 of 100 (Notable)
Spooner Ag Rsch STN	United States	Record daily precipitation	45.7 mm (1.8 in)	53 of 100 (Notable)
Ganzhou	China	Record daily precipitation	58.2 mm (2.3 in)	52 of 100 (Notable)
McAlester Rgnl AP	United States	Record daily precipitation	147.1 mm (5.8 in)	52 of 100 (Notable)
Risnes I Fjotland	Norway	Record daily precipitation	64.8 mm (2.6 in)	50 of 100 (Notable)
Forest Lake 5NE	United States	Record daily precipitation	105.7 mm (4.2 in)	50 of 100 (Notable)
Heggeriset - Nordstrand	Norway	Record daily precipitation	44.2 mm (1.7 in)	49 of 100 (Notable)
Vik I Sogn III	Norway	Record daily precipitation	25.2 mm (1.0 in)	48 of 100 (Notable)
Vilnius	Lithuania	Record high maximum temperature	27.4 C (81.3 F)	46 of 100 (Notable)
Jordan 1SSW	United States	Record daily precipitation	65.0 mm (2.6 in)	45 of 100 (Notable)
Ferris	United States	Record daily precipitation	93.5 mm (3.7 in)	45 of 100 (Notable)
Birmingham AP	United States	Record high minimum temperature	25.6 C (78.1 F)	45 of 100 (Notable)
Lysebotn	Norway	Record daily precipitation	56.7 mm (2.2 in)	44 of 100 (Notable)
U of Mn St Paul	United States	Record daily precipitation	85.6 mm (3.4 in)	44 of 100 (Notable)
Comanche	United States	Record daily precipitation	72.4 mm (2.9 in)	44 of 100 (Notable)
Selby	United States	Record daily precipitation	44.5 mm (1.8 in)	44 of 100 (Notable)
Jian	China	Record daily precipitation	73.9 mm (2.9 in)	43 of 100 (Notable)
Plant City	United States	Record high maximum temperature	36.7 C (98.1 F)	43 of 100 (Notable)
Robinson	United States	Record high minimum temperature	21.7 C (71.1 F)	43 of 100 (Notable)
Logansport Cicott St	United States	Record high minimum temperature	19.4 C (66.9 F)	43 of 100 (Notable)
Black Rvr Falls Sewage	United States	Record daily precipitation	31.2 mm (1.2 in)	43 of 100 (Notable)
Orlando Executive AP	United States	Record high minimum temperature	25.6 C (78.1 F)	43 of 100 (Notable)
Tonghe	China	Record daily precipitation	35.8 mm (1.4 in)	42 of 100 (Notable)
Dresden-Strehlen	Germany	Record high maximum temperature	30.8 C (87.4 F)	42 of 100 (Notable)
Elgin Water	United States	Record high minimum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Allerton	United States	Record high maximum temperature	33.3 C (91.9 F)	42 of 100 (Notable)
Jefferson City Wtp	United States	Record high minimum temperature	23.3 C (73.9 F)	42 of 100 (Notable)
Hallettsville 2 N	United States	Record high minimum temperature	26.1 C (79.0 F)	42 of 100 (Notable)
Saga	Japan	Record daily precipitation	93.0 mm (3.7 in)	41 of 100 (Notable)
Gordalen	Sweden	Record daily precipitation	25.4 mm (1.0 in)	41 of 100 (Notable)
Monmouth	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Lockport 2SE	United States	Record high maximum temperature	31.1 C (88.0 F)	41 of 100 (Notable)
Marlow 1 WSW	United States	Record daily precipitation	81.8 mm (3.2 in)	41 of 100 (Notable)
Cuero	United States	Record high minimum temperature	25.0 C (77.0 F)	41 of 100 (Notable)
Rice Lake	United States	Record daily precipitation	53.3 mm (2.1 in)	41 of 100 (Notable)
Tartu-Toravere	Estonia	Record high maximum temperature	24.7 C (76.5 F)	40 of 100 (Notable)
Gogland	Russia	Record high minimum temperature	14.4 C (57.9 F)	40 of 100 (Notable)
Aurora Water	United States	Record high maximum temperature	34.4 C (93.9 F)	40 of 100 (Notable)
Carroll	United States	Record daily precipitation	32.0 mm (1.3 in)	40 of 100 (Notable)
Logan 1 WNW	United States	Record daily precipitation	47.0 mm (1.9 in)	40 of 100 (Notable)
Newton	United States	Record high maximum temperature	33.3 C (91.9 F)	40 of 100 (Notable)
Washta	United States	Record high maximum temperature	33.3 C (91.9 F)	40 of 100 (Notable)
Hopkinsville	United States	Record high minimum temperature	23.3 C (73.9 F)	40 of 100 (Notable)
Plentywood	United States	Record daily precipitation	28.7 mm (1.1 in)	40 of 100 (Notable)
Mc Leod 3 E	United States	Record daily precipitation	29.0 mm (1.1 in)	40 of 100 (Notable)
Waverly	United States	Record high minimum temperature	20.6 C (69.1 F)	40 of 100 (Notable)
Hiddensee-Vitte	Germany	Record high maximum temperature	27.4 C (81.3 F)	39 of 100 (Notable)
Velikie Luki	Russia	Record high maximum temperature	27.3 C (81.1 F)	39 of 100 (Notable)
Winamac 2SSE	United States	Record high maximum temperature	33.9 C (93.0 F)	39 of 100 (Notable)
Red Lake Indian Agcy	United States	Record daily precipitation	36.1 mm (1.4 in)	39 of 100 (Notable)
Xenia 6 SSE	United States	Record high minimum temperature	22.8 C (73.0 F)	39 of 100 (Notable)

Counts by Type and Timescale

1,051 records

Records set or tied on 21 September 2018 by type: Highest daily maximum 402, Lowest daily maximum 24, Highest daily minimum 356, Lowest daily minimum 29, Heaviest daily rainfall 240.

Records on 21 September 2018 by type
Record type	Records
Highest daily maximum	402
Lowest daily maximum	24
Highest daily minimum	356
Lowest daily minimum	29
Heaviest daily rainfall	240
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 September 2018 by timescale: all-time 1, monthly 17, daily 1,033.

How Much Records Were Beaten By

844 broken records

Margins by which the 844 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 120.4. Ties are not counted.

Top 20 by Significance

21 September 2018

Top 20 records on 21 September 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2018	Milford 4 NW, US	daily rain	114.3 mm (4.5 in)	64.0 mm (2.5 in)	57 years	67 of 100 (Major)
21 September 2018	Washta, US	daily rain	81.3 mm (3.2 in)	46.8 mm (1.8 in)	93 years	66 of 100 (Major)
21 September 2018	St Croix Falls, US	daily rain	121.9 mm (4.8 in)	86.6 mm (3.4 in)	59 years	63 of 100 (Major)
21 September 2018	Winter, US	daily rain	97.3 mm (3.8 in)	58.4 mm (2.3 in)	45 years	63 of 100 (Major)
21 September 2018	Ashley, US	daily rain	53.3 mm (2.1 in)	30.7 mm (1.2 in)	48 years	62 of 100 (Major)
21 September 2018	Napoleon, US	daily rain	36.1 mm (1.4 in)	18.3 mm (0.7 in)	108 years	62 of 100 (Major)
21 September 2018	Eureka, US	daily rain	43.4 mm (1.7 in)	24.9 mm (1.0 in)	63 years	58 of 100 (Notable)
21 September 2018	Kumamoto, JP	daily rain	138.4 mm (5.4 in)	120.4 mm (4.7 in)	29 years	54 of 100 (Notable)
21 September 2018	Poteet, US	monthly high min	32.8 C (91.0 F)	6.7 C (12.1 F)	58 years	54 of 100 (Notable)
21 September 2018	Balasore, IN	daily rain	141.0 mm (5.6 in)	30.3 mm (1.2 in)	116 years	53 of 100 (Notable)
21 September 2018	Spooner Ag Rsch STN, US	daily rain	45.7 mm (1.8 in)	16.5 mm (0.6 in)	104 years	53 of 100 (Notable)
21 September 2018	Ganzhou, CN	daily rain	58.2 mm (2.3 in)	39.7 mm (1.6 in)	51 years	52 of 100 (Notable)
21 September 2018	McAlester Rgnl AP, US	daily rain	147.1 mm (5.8 in)	87.2 mm (3.4 in)	8 years	52 of 100 (Notable)
21 September 2018	Risnes I Fjotland, NO	daily rain	64.8 mm (2.6 in)	19.6 mm (0.8 in)	80 years	50 of 100 (Notable)
21 September 2018	Forest Lake 5NE, US	monthly rain	105.7 mm (4.2 in)	34.3 mm (1.4 in)	12 years	50 of 100 (Notable)
21 September 2018	Heggeriset - Nordstrand, NO	daily rain	44.2 mm (1.7 in)	27.6 mm (1.1 in)	13 years	49 of 100 (Notable)
21 September 2018	Vik I Sogn III, NO	daily rain	25.2 mm (1.0 in)	6.9 mm (0.27 in)	99 years	48 of 100 (Notable)
21 September 2018	Vilnius, LT	daily high max	27.4 C (81.3 F)	3.0 C (5.4 F)	108 years	46 of 100 (Notable)
21 September 2018	Jordan 1SSW, US	daily rain	65.0 mm (2.6 in)	38.6 mm (1.5 in)	32 years	45 of 100 (Notable)
21 September 2018	Ferris, US	daily rain	93.5 mm (3.7 in)	68.1 mm (2.7 in)	23 years	45 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

1805 to 2018

Records set or tied on this calendar date in each year from 1805 to 2018. 2018 had 1,051 records.

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

Records on 09-21 in each year
Year	Records
1805	1
1812	1
1825	2
1840	1
1841	1
1842	1
1848	1
1854	1
1856	2
1868	1
1872	2
1873	1
1877	1
1878	1
1881	1
1882	1
1884	1
1886	1
1888	2
1889	1
1891	10
1892	1
1893	10
1894	2
1895	3
1896	2
1897	6
1898	6
1899	3
1900	2
1901	5
1902	5
1903	8
1904	20
1905	12
1906	17
1907	10
1908	17
1909	10
1910	8
1911	18
1912	26
1913	37
1914	29
1915	34
1916	48
1917	28
1918	43
1919	54
1920	29
1921	64
1922	35
1923	232
1924	291
1925	278
1926	178
1927	165
1928	81
1929	232
1930	82
1931	681
1932	242
1933	193
1934	492
1935	199
1936	329
1937	487
1938	508
1939	308
1940	908
1941	416
1942	291
1943	407
1944	413
1945	507
1946	176
1947	534
1948	301
1949	298
1950	334
1951	241
1952	430
1953	382
1954	453
1955	752
1956	1,100
1957	366
1958	588
1959	513
1960	418
1961	441
1962	1,085
1963	306
1964	374
1965	1,088
1966	565
1967	577
1968	790
1969	593
1970	708
1971	645
1972	599
1973	421
1974	652
1975	528
1976	694
1977	918
1978	818
1979	736
1980	990
1981	696
1982	1,484
1983	2,207
1984	707
1985	796
1986	671
1987	965
1988	557
1989	1,002
1990	716
1991	1,021
1992	752
1993	911
1994	713
1995	2,002
1996	1,233
1997	1,112
1998	1,481
1999	1,025
2000	884
2001	718
2002	696
2003	959
2004	888
2005	1,143
2006	920
2007	742
2008	740
2009	715
2010	1,290
2011	542
2012	595
2013	769
2014	716
2015	565
2016	989
2017	1,178
2018	1,051
2019	833
2020	580
2021	465
2022	1,049
2023	783
2024	470
2025	588
2026	469

Download the Data

Data for records on 2018-09-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Margin	Records
0 to 20	804
20 to 40	29
40 to 60	5
60 to 80	3
80 to 100	2
100 to 120	0
120 to 140	1