Weather Records on 21 September 1986

671 weather records were set or tied worldwide on 21 September 1986. Highest significance: Elkader 6 SSW, US.

Key Facts for 21 September 1986

On 21 September 1986, 671 weather records were set or tied at long-record stations worldwide.
276 were record highs and 213 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 19 monthly and 652 daily.
Elkader 6 SSW set a daily record precipitation of 82.0 mm (3.2 in) on 21 September 1986.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 450 records.

Record Map

671 stations

671 station records on 21 September 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Elkader 6 SSW	United States	Record daily precipitation	82.0 mm (3.2 in)	59 of 100 (Notable)
Grand Meadow	United States	Record daily precipitation	69.9 mm (2.8 in)	57 of 100 (Notable)
Methoni	Greece	Record daily precipitation	158.8 mm (6.3 in)	56 of 100 (Notable)
Crater Lake Nps HQ	United States	Record snow depth	38.1 cm (15.0 in)	55 of 100 (Notable)
Waukon 3NNE	United States	Record daily precipitation	85.1 mm (3.4 in)	51 of 100 (Notable)
Cresco 1 NE	United States	Record daily precipitation	130.8 mm (5.1 in)	50 of 100 (Notable)
Beaver	United States	Record daily precipitation	85.6 mm (3.4 in)	49 of 100 (Notable)
Maple Plain	United States	Record daily precipitation	60.5 mm (2.4 in)	49 of 100 (Notable)
Minneapolis-St Paul Intl AP	United States	Record daily precipitation	52.6 mm (2.1 in)	48 of 100 (Notable)
Pella 1S	United States	Record daily precipitation	71.1 mm (2.8 in)	46 of 100 (Notable)
Austin Waste Wtp Facility	United States	Record daily precipitation	95.0 mm (3.7 in)	46 of 100 (Notable)
Palmerville	Australia	Record high maximum temperature	39.0 C (102.2 F)	45 of 100 (Notable)
Fayette	United States	Record daily precipitation	66.0 mm (2.6 in)	45 of 100 (Notable)
Burketown Post Office	Australia	Record high minimum temperature	26.5 C (79.7 F)	44 of 100 (Notable)
Ponte Alta 1	Brazil	Record daily precipitation	72.4 mm (2.9 in)	44 of 100 (Notable)
Tetitlan (Cfe)	Mexico	Record low maximum temperature	23.9 C (75.0 F)	44 of 100 (Notable)
Rosemount Rsch & Outreach Ctr	United States	Record daily precipitation	72.4 mm (2.9 in)	44 of 100 (Notable)
Winona	United States	Record daily precipitation	74.7 mm (2.9 in)	44 of 100 (Notable)
Muroran	Japan	Record daily precipitation	79.0 mm (3.1 in)	43 of 100 (Notable)
Bairro Alto	Brazil	Record daily precipitation	44.6 mm (1.8 in)	42 of 100 (Notable)
New London Lock #22	United States	Record daily precipitation	33.8 mm (1.3 in)	40 of 100 (Notable)
Medina	United States	Record daily precipitation	38.4 mm (1.5 in)	40 of 100 (Notable)
Celina	United States	Record daily precipitation	52.3 mm (2.1 in)	40 of 100 (Notable)
El Rosarito	Mexico	Record daily precipitation	63.0 mm (2.5 in)	39 of 100 (Notable)
Bodie California St Historic P	United States	Record low minimum temperature	-13.9 C (7.0 F)	39 of 100 (Notable)
Osage	United States	Record daily precipitation	51.1 mm (2.0 in)	38 of 100 (Notable)
Hammond	United States	Record daily precipitation	101.3 mm (4.0 in)	38 of 100 (Notable)
Holton	United States	Record high minimum temperature	24.4 C (75.9 F)	37 of 100 (Notable)
Atoyac	Mexico	Record low maximum temperature	22.2 C (72.0 F)	36 of 100 (Notable)
Manati 2 E	Puerto Rico [United States]	Record high minimum temperature	24.4 C (75.9 F)	36 of 100 (Notable)
Ellsworth 1E	United States	Record daily precipitation	70.4 mm (2.8 in)	36 of 100 (Notable)
Dubuque L&D 11	United States	Record daily precipitation	82.6 mm (3.3 in)	35 of 100 (Notable)
Stillwater 1 SE	United States	Record daily precipitation	55.4 mm (2.2 in)	35 of 100 (Notable)
Kearney 4 NE	United States	Record high minimum temperature	21.1 C (70.0 F)	35 of 100 (Notable)
Picinguaba	Brazil	Record daily precipitation	74.7 mm (2.9 in)	33 of 100 (Routine)
Litchfield	United States	Record daily precipitation	51.3 mm (2.0 in)	33 of 100 (Routine)
Stanton	United States	Record high minimum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Bundaberg Post Office	Australia	Record high maximum temperature	32.0 C (89.6 F)	32 of 100 (Routine)
Ugut	Russia	Record daily precipitation	25.7 mm (1.0 in)	32 of 100 (Routine)
Lynxville Dam 9	United States	Record daily precipitation	44.5 mm (1.8 in)	32 of 100 (Routine)
Waialua 847	United States	Record high minimum temperature	22.2 C (72.0 F)	32 of 100 (Routine)
Casa Grande	Brazil	Record daily precipitation	82.5 mm (3.2 in)	31 of 100 (Routine)
Rio Do Pouso	Brazil	Record daily precipitation	49.8 mm (2.0 in)	31 of 100 (Routine)
Guadalajara (Dge)	Mexico	Record low maximum temperature	22.8 C (73.0 F)	31 of 100 (Routine)
Tenosique (Smn)	Mexico	Record low minimum temperature	20.0 C (68.0 F)	31 of 100 (Routine)
Becanchen	Mexico	Record low minimum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Skegness	United Kingdom	Record high maximum temperature	21.7 C (71.1 F)	31 of 100 (Routine)
Burlington	United States	Record high minimum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Chaska	United States	Record daily precipitation	40.6 mm (1.6 in)	31 of 100 (Routine)
Mora	United States	Record daily precipitation	38.6 mm (1.5 in)	31 of 100 (Routine)
Prairie du Chien	United States	Record daily precipitation	44.5 mm (1.8 in)	31 of 100 (Routine)
Gabes	Tunisia	Record high minimum temperature	26.1 C (79.0 F)	30 of 100 (Routine)
Okay	United States	Record daily precipitation	43.9 mm (1.7 in)	30 of 100 (Routine)
Okeechobee	United States	Record daily precipitation	84.3 mm (3.3 in)	30 of 100 (Routine)
Lansing	United States	Record daily precipitation	39.4 mm (1.6 in)	30 of 100 (Routine)
Smith Ctr	United States	Record high minimum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Georgetown Post Office	Australia	Record high maximum temperature	38.0 C (100.4 F)	29 of 100 (Routine)
Ejutla	Mexico	Record low maximum temperature	20.6 C (69.1 F)	29 of 100 (Routine)
Urjupinsk	Russia	Record low maximum temperature	10.4 C (50.7 F)	29 of 100 (Routine)
De Sabla	United States	Record low minimum temperature	0.0 C (32.0 F)	29 of 100 (Routine)

Counts by Type and Timescale

671 records

Records set or tied on 21 September 1986 by type: Highest daily maximum 103, Lowest daily maximum 85, Highest daily minimum 173, Lowest daily minimum 128, Heaviest daily rainfall 180, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 21 September 1986 by type
Record type	Records
Highest daily maximum	103
Lowest daily maximum	85
Highest daily minimum	173
Lowest daily minimum	128
Heaviest daily rainfall	180
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 21 September 1986 by timescale: all-time 0, monthly 19, daily 652.

How Much Records Were Beaten By

519 broken records

Margins by which the 519 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 381.0. Ties are not counted.

Top 20 by Significance

21 September 1986

Top 20 records on 21 September 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1986	Elkader 6 SSW, US	daily rain	82.0 mm (3.2 in)	62.2 mm (2.4 in)	36 years	59 of 100 (Notable)
21 September 1986	Grand Meadow, US	daily rain	69.9 mm (2.8 in)	29.3 mm (1.2 in)	91 years	57 of 100 (Notable)
21 September 1986	Methoni, GR	monthly rain	158.8 mm (6.3 in)	109.6 mm (4.3 in)	11 years	56 of 100 (Notable)
21 September 1986	Crater Lake Nps HQ, US	daily snow depth	38.1 cm (15.0 in)	38.1 cm (15.0 in)	59 years	55 of 100 (Notable)
21 September 1986	Waukon 3NNE, US	daily rain	85.1 mm (3.4 in)	61.2 mm (2.4 in)	20 years	51 of 100 (Notable)
21 September 1986	Cresco 1 NE, US	monthly rain	130.8 mm (5.1 in)	26.7 mm (1.1 in)	40 years	50 of 100 (Notable)
21 September 1986	Beaver, US	daily rain	85.6 mm (3.4 in)	56.1 mm (2.2 in)	13 years	49 of 100 (Notable)
21 September 1986	Maple Plain, US	daily rain	60.5 mm (2.4 in)	24.9 mm (1.0 in)	61 years	49 of 100 (Notable)
21 September 1986	Minneapolis-St Paul Intl AP, US	daily rain	52.6 mm (2.1 in)	32.5 mm (1.3 in)	37 years	48 of 100 (Notable)
21 September 1986	Pella 1S, US	daily rain	71.1 mm (2.8 in)	30.5 mm (1.2 in)	67 years	46 of 100 (Notable)
21 September 1986	Austin Waste Wtp Facility, US	daily rain	95.0 mm (3.7 in)	57.4 mm (2.3 in)	5 years	46 of 100 (Notable)
21 September 1986	Palmerville, AU	daily high max	39.0 C (102.2 F)	2.2 C (4.0 F)	84 years	45 of 100 (Notable)
21 September 1986	Fayette, US	daily rain	66.0 mm (2.6 in)	38.1 mm (1.5 in)	20 years	45 of 100 (Notable)
21 September 1986	Burketown Post Office, AU	daily high min	26.5 C (79.7 F)	3.0 C (5.4 F)	85 years	44 of 100 (Notable)
21 September 1986	Ponte Alta 1, BR	daily rain	72.4 mm (2.9 in)	44.8 mm (1.8 in)	1 year	44 of 100 (Notable)
21 September 1986	Tetitlan (Cfe), MX	daily low max	23.9 C (75.0 F)	6.1 C (11.0 F)	28 years	44 of 100 (Notable)
21 September 1986	Rosemount Rsch & Outreach Ctr, US	daily rain	72.4 mm (2.9 in)	41.4 mm (1.6 in)	17 years	44 of 100 (Notable)
21 September 1986	Winona, US	monthly rain	74.7 mm (2.9 in)	3.6 mm (0.14 in)	79 years	44 of 100 (Notable)
21 September 1986	Muroran, JP	daily rain	79.0 mm (3.1 in)	58.0 mm (2.3 in)	23 years	43 of 100 (Notable)
21 September 1986	Bairro Alto, BR	daily rain	44.6 mm (1.8 in)	22.3 mm (0.9 in)	20 years	42 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 1986

Records set or tied on this calendar date in each year from 1805 to 1986. 1986 had 671 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 1986-09-21: 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 50	511
50 to 100	6
100 to 150	1
150 to 200	0
200 to 250	0
250 to 300	0
300 to 350	0
350 to 400	1