Weather Records on 21 September 2015

565 weather records were set or tied worldwide on 21 September 2015. Highest significance: Kailua 446, US.

Key Facts for 21 September 2015

On 21 September 2015, 565 weather records were set or tied at long-record stations worldwide.
386 were record highs and 46 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 11 monthly and 552 daily.
Kailua 446 set a daily record precipitation of 66.3 mm (2.6 in) on 21 September 2015.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 450 records.

Record Map

565 stations

565 station records on 21 September 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kailua 446	United States	Record daily precipitation	66.3 mm (2.6 in)	68 of 100 (Major)
Cascabel	United States	Record daily precipitation	82.6 mm (3.3 in)	63 of 100 (Major)
Arivaca	United States	Record daily precipitation	53.3 mm (2.1 in)	53 of 100 (Notable)
Novaja Ladoga	Russia	Record daily precipitation	33.0 mm (1.3 in)	51 of 100 (Notable)
Paakea 350	United States	Record daily precipitation	78.7 mm (3.1 in)	50 of 100 (Notable)
Kennewick	United States	Record high minimum temperature	18.3 C (64.9 F)	47 of 100 (Notable)
Heyuan	China	Record daily precipitation	90.9 mm (3.6 in)	46 of 100 (Notable)
Bolton Point (the Ridge Way)	Australia	Record daily precipitation	51.2 mm (2.0 in)	45 of 100 (Notable)
Turlock #2	United States	Record high minimum temperature	20.0 C (68.0 F)	44 of 100 (Notable)
Jharsuguda	India	Record daily precipitation	49.0 mm (1.9 in)	43 of 100 (Notable)
Libby 1 NE Rs	United States	Record high minimum temperature	17.8 C (64.0 F)	43 of 100 (Notable)
Kirensk	Russia	Record low minimum temperature	-7.2 C (19.0 F)	42 of 100 (Notable)
Priest Rvr Exp STN	United States	Record high minimum temperature	13.3 C (55.9 F)	42 of 100 (Notable)
Mikkeli Pitkahiekka	Finland	Record daily precipitation	41.5 mm (1.6 in)	41 of 100 (Notable)
Ornskoldsvik	Sweden	Record daily precipitation	34.1 mm (1.3 in)	41 of 100 (Notable)
Quartzsite	United States	Record daily precipitation	31.0 mm (1.2 in)	41 of 100 (Notable)
Lacrosse	United States	Record high minimum temperature	14.4 C (57.9 F)	41 of 100 (Notable)
Bogoroditskoye-Fenino	Russia	Record high maximum temperature	27.4 C (81.3 F)	40 of 100 (Notable)
Klaipeda	Lithuania	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Norris Madison Pwr House	United States	Record high minimum temperature	13.3 C (55.9 F)	39 of 100 (Notable)
Kutaisi	Georgia	Record high maximum temperature	36.4 C (97.5 F)	38 of 100 (Notable)
Sasabe	United States	Record daily precipitation	50.8 mm (2.0 in)	38 of 100 (Notable)
Fallon Exp STN	United States	Record high maximum temperature	33.3 C (91.9 F)	38 of 100 (Notable)
Watsonville Wtr Wks	United States	Record high maximum temperature	36.1 C (97.0 F)	37 of 100 (Notable)
Nimbin Post Office	Australia	Record daily precipitation	36.0 mm (1.4 in)	36 of 100 (Notable)
Mc Neal	United States	Record daily precipitation	29.2 mm (1.1 in)	36 of 100 (Notable)
Duncan 10 W	United States	Record daily precipitation	56.1 mm (2.2 in)	36 of 100 (Notable)
Maverick Fork	United States	Record daily precipitation	30.5 mm (1.2 in)	36 of 100 (Notable)
Savonlinna Laukansaari	Finland	Record daily precipitation	29.9 mm (1.2 in)	35 of 100 (Notable)
Veraval	India	Record daily precipitation	75.9 mm (3.0 in)	35 of 100 (Notable)
Surat Thani	Thailand	Record high maximum temperature	36.2 C (97.2 F)	35 of 100 (Notable)
Yerington	United States	Record high maximum temperature	35.0 C (95.0 F)	35 of 100 (Notable)
Kojnas	Russia	Record high minimum temperature	10.3 C (50.5 F)	34 of 100 (Routine)
Diredawa	Ethiopia	Record high maximum temperature	36.6 C (97.9 F)	33 of 100 (Routine)
Raoul Isl/Kermadec	New Zealand	Record daily precipitation	38.4 mm (1.5 in)	33 of 100 (Routine)
Elatma	Russia	Record high maximum temperature	26.9 C (80.4 F)	33 of 100 (Routine)
Ohotsk	Russia	Record high minimum temperature	11.6 C (52.9 F)	33 of 100 (Routine)
Suphan Buri	Thailand	Record high minimum temperature	27.5 C (81.5 F)	33 of 100 (Routine)
Santa Barbara	United States	Record high minimum temperature	21.1 C (70.0 F)	33 of 100 (Routine)
Canal Pt USDA	United States	Record high minimum temperature	26.1 C (79.0 F)	33 of 100 (Routine)
Annex Creek	United States	Record low maximum temperature	7.2 C (45.0 F)	33 of 100 (Routine)
Cheyenne	United States	Record high maximum temperature	29.4 C (84.9 F)	33 of 100 (Routine)
Anfa	Morocco	Record high maximum temperature	32.2 C (90.0 F)	32 of 100 (Routine)
Loreto	Mexico	Record daily precipitation	80.3 mm (3.2 in)	32 of 100 (Routine)
Colfax	United States	Record high maximum temperature	37.2 C (99.0 F)	32 of 100 (Routine)
Moscow	Russia	Record high minimum temperature	13.1 C (55.6 F)	31 of 100 (Routine)
Gotnja	Russia	Record high maximum temperature	27.1 C (80.8 F)	31 of 100 (Routine)
Sasabe	United States	Record low maximum temperature	22.2 C (72.0 F)	31 of 100 (Routine)
Halepohaku 111	United States	Record daily precipitation	40.6 mm (1.6 in)	31 of 100 (Routine)
Santa Maria Public AP	United States	Record high maximum temperature	33.3 C (91.9 F)	31 of 100 (Routine)
Bangalow Motel	Australia	Record daily precipitation	27.6 mm (1.1 in)	30 of 100 (Routine)
Monte S. Angelo	Italy	Record low minimum temperature	2.0 C (35.6 F)	30 of 100 (Routine)
Skrova Fyr	Norway	Record high maximum temperature	17.1 C (62.8 F)	30 of 100 (Routine)
Manston	United Kingdom	Record daily precipitation	25.6 mm (1.0 in)	30 of 100 (Routine)
Five Points 5 SSW	United States	Record high maximum temperature	40.6 C (105.1 F)	30 of 100 (Routine)
Stanley 3 NNW	United States	Record high minimum temperature	10.0 C (50.0 F)	30 of 100 (Routine)
Atoka	United States	Record low maximum temperature	20.0 C (68.0 F)	30 of 100 (Routine)
Paauilo 221	United States	Record daily precipitation	118.4 mm (4.7 in)	30 of 100 (Routine)
Bailing-Miao	China	Record daily precipitation	31.2 mm (1.2 in)	29 of 100 (Routine)
Invercargill Airpor	New Zealand	Record low minimum temperature	-2.2 C (28.0 F)	29 of 100 (Routine)

Counts by Type and Timescale

565 records

Records set or tied on 21 September 2015 by type: Highest daily maximum 171, Lowest daily maximum 26, Highest daily minimum 215, Lowest daily minimum 20, Heaviest daily rainfall 133.

Records on 21 September 2015 by type
Record type	Records
Highest daily maximum	171
Lowest daily maximum	26
Highest daily minimum	215
Lowest daily minimum	20
Heaviest daily rainfall	133
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 September 2015 by timescale: all-time 2, monthly 11, daily 552.

How Much Records Were Beaten By

453 broken records

Margins by which the 453 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 49.2. Ties are not counted.

Top 20 by Significance

21 September 2015

Top 20 records on 21 September 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2015	Kailua 446, US	daily rain	66.3 mm (2.6 in)	37.1 mm (1.5 in)	104 years	68 of 100 (Major)
21 September 2015	Cascabel, US	monthly rain	82.6 mm (3.3 in)	39.4 mm (1.6 in)	31 years	63 of 100 (Major)
21 September 2015	Arivaca, US	daily rain	53.3 mm (2.1 in)	42.6 mm (1.7 in)	16 years	53 of 100 (Notable)
21 September 2015	Novaja Ladoga, RU	daily rain	33.0 mm (1.3 in)	22.9 mm (0.9 in)	24 years	51 of 100 (Notable)
21 September 2015	Paakea 350, US	daily rain	78.7 mm (3.1 in)	45.2 mm (1.8 in)	45 years	50 of 100 (Notable)
21 September 2015	Kennewick, US	daily high min	18.3 C (64.9 F)	2.7 C (4.9 F)	109 years	47 of 100 (Notable)
21 September 2015	Heyuan, CN	daily rain	90.9 mm (3.6 in)	49.2 mm (1.9 in)	53 years	46 of 100 (Notable)
21 September 2015	Bolton Point (the Ridge Way), AU	daily rain	51.2 mm (2.0 in)	31.9 mm (1.3 in)	52 years	45 of 100 (Notable)
21 September 2015	Turlock #2, US	daily high min	20.0 C (68.0 F)	1.7 C (3.1 F)	116 years	44 of 100 (Notable)
21 September 2015	Jharsuguda, IN	daily rain	49.0 mm (1.9 in)	38.3 mm (1.5 in)	60 years	43 of 100 (Notable)
21 September 2015	Libby 1 NE Rs, US	daily high min	17.8 C (64.0 F)	4.5 C (8.1 F)	74 years	43 of 100 (Notable)
21 September 2015	Kirensk, RU	daily low min	-7.2 C (19.0 F)	1.3 C (2.3 F)	98 years	42 of 100 (Notable)
21 September 2015	Priest Rvr Exp STN, US	daily high min	13.3 C (55.9 F)	1.1 C (2.0 F)	115 years	42 of 100 (Notable)
21 September 2015	Mikkeli Pitkahiekka, FI	monthly rain	41.5 mm (1.6 in)	7.7 mm (0.30 in)	42 years	41 of 100 (Notable)
21 September 2015	Ornskoldsvik, SE	daily rain	34.1 mm (1.3 in)	11.4 mm (0.4 in)	60 years	41 of 100 (Notable)
21 September 2015	Quartzsite, US	daily rain	31.0 mm (1.2 in)	9.4 mm (0.37 in)	77 years	41 of 100 (Notable)
21 September 2015	Lacrosse, US	daily high min	14.4 C (57.9 F)	0.5 C (0.9 F)	104 years	41 of 100 (Notable)
21 September 2015	Bogoroditskoye-Fenino, RU	daily high max	27.4 C (81.3 F)	0.5 C (0.9 F)	101 years	40 of 100 (Notable)
21 September 2015	Klaipeda, LT	daily rain	33.0 mm (1.3 in)	12.9 mm (0.5 in)	33 years	39 of 100 (Notable)
21 September 2015	Norris Madison Pwr House, US	daily high min	13.3 C (55.9 F)	1.1 C (2.0 F)	92 years	39 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 2015

Records set or tied on this calendar date in each year from 1805 to 2015. 2015 had 565 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 2015-09-21: 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 2026-10-13 (13 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 10	408
10 to 20	24
20 to 30	9
30 to 40	6
40 to 50	6