Weather Records on 23 September 2015

587 weather records were set or tied worldwide on 23 September 2015. Highest significance: Mosquero 1 NE, US.

Key Facts for 23 September 2015

On 23 September 2015, 587 weather records were set or tied at long-record stations worldwide.
426 were record highs and 73 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 580 daily.
Mosquero 1 NE set a daily record precipitation of 65.0 mm (2.6 in) on 23 September 2015.
Across 169 earlier years (1793 to 2026) the same calendar date averaged 430 records.

Record Map

587 stations

587 station records on 23 September 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 23 September 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mosquero 1 NE	United States	Record daily precipitation	65.0 mm (2.6 in)	72 of 100 (Major)
Audubon	United States	Record daily precipitation	116.1 mm (4.6 in)	70 of 100 (Major)
Wakefield 3NW	United States	Record daily precipitation	61.0 mm (2.4 in)	65 of 100 (Major)
Valentine Miller Fld AP	United States	Record daily precipitation	90.9 mm (3.6 in)	64 of 100 (Major)
San Andres (Isla)/S	Colombia	Record daily precipitation	116.1 mm (4.6 in)	59 of 100 (Notable)
Friona	United States	Record daily precipitation	64.3 mm (2.5 in)	59 of 100 (Notable)
Kealakekua 26.2	United States	Record high minimum temperature	21.1 C (70.0 F)	59 of 100 (Notable)
Keshan	China	Record daily precipitation	49.5 mm (1.9 in)	54 of 100 (Notable)
Purdum	United States	Record daily precipitation	62.2 mm (2.4 in)	53 of 100 (Notable)
Omaha Eppley Airfield	United States	Record daily precipitation	145.8 mm (5.7 in)	51 of 100 (Notable)
Walthill 1E	United States	Record daily precipitation	45.2 mm (1.8 in)	50 of 100 (Notable)
Forman 5 SSE	United States	Record daily precipitation	54.1 mm (2.1 in)	49 of 100 (Notable)
Butte	United States	Record daily precipitation	69.1 mm (2.7 in)	48 of 100 (Notable)
Kon-Kolodez	Russia	Record high maximum temperature	30.8 C (87.4 F)	45 of 100 (Notable)
Bogoroditskoye-Fenino	Russia	Record high maximum temperature	29.9 C (85.8 F)	44 of 100 (Notable)
Valentine Nwr	United States	Record daily precipitation	94.2 mm (3.7 in)	44 of 100 (Notable)
Tyndall	United States	Record daily precipitation	83.3 mm (3.3 in)	44 of 100 (Notable)
Poretskoye	Russia	Record high maximum temperature	28.8 C (83.8 F)	43 of 100 (Notable)
Cekunda	Russia	Record daily precipitation	32.2 mm (1.3 in)	43 of 100 (Notable)
Poltava	Ukraine	Record high maximum temperature	30.7 C (87.3 F)	43 of 100 (Notable)
San Carlos Rsvr	United States	Record low maximum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Lyons	United States	Record daily precipitation	81.8 mm (3.2 in)	43 of 100 (Notable)
Voronez	Russia	Record high maximum temperature	30.8 C (87.4 F)	42 of 100 (Notable)
Kamennaja-Step	Russia	Record high maximum temperature	30.6 C (87.1 F)	42 of 100 (Notable)
Montrose #2	United States	Record high minimum temperature	12.8 C (55.0 F)	42 of 100 (Notable)
Astrakan	Russia	Record high minimum temperature	17.0 C (62.6 F)	41 of 100 (Notable)
Douglas 1 SE	United States	Record high minimum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Elatma	Russia	Record high maximum temperature	26.4 C (79.5 F)	40 of 100 (Notable)
Kursk	Russia	Record high maximum temperature	27.9 C (82.2 F)	40 of 100 (Notable)
Gallivare_A	Sweden	Record high minimum temperature	7.2 C (45.0 F)	40 of 100 (Notable)
Hays 1 S	United States	Record high maximum temperature	36.7 C (98.1 F)	40 of 100 (Notable)
Morris W Cntrl Rsch & Outreach	United States	Record daily precipitation	28.7 mm (1.1 in)	40 of 100 (Notable)
Niznij Novgorod	Russia	Record high maximum temperature	24.7 C (76.5 F)	39 of 100 (Notable)
Kiev	Ukraine	Record high maximum temperature	28.4 C (83.1 F)	39 of 100 (Notable)
Plainville 4WNW	United States	Record high maximum temperature	36.7 C (98.1 F)	38 of 100 (Notable)
Arthur	United States	Record daily precipitation	49.8 mm (2.0 in)	38 of 100 (Notable)
Tekamah	United States	Record daily precipitation	41.1 mm (1.6 in)	38 of 100 (Notable)
Wayne	United States	Record daily precipitation	64.0 mm (2.5 in)	38 of 100 (Notable)
Pickstown	United States	Record daily precipitation	73.7 mm (2.9 in)	38 of 100 (Notable)
Lubny	Ukraine	Record high maximum temperature	29.1 C (84.4 F)	37 of 100 (Notable)
Kharkiv	Ukraine	Record high maximum temperature	30.7 C (87.3 F)	37 of 100 (Notable)
Uman	Ukraine	Record high maximum temperature	29.4 C (84.9 F)	36 of 100 (Notable)
N Platte Exp Farm	United States	Record high minimum temperature	15.6 C (60.1 F)	36 of 100 (Notable)
Saint Paul Is AP	United States	Record high minimum temperature	8.9 C (48.0 F)	36 of 100 (Notable)
Srinagar	India	Record daily precipitation	38.1 mm (1.5 in)	35 of 100 (Notable)
West Souburg	Netherlands	Record daily precipitation	25.7 mm (1.0 in)	35 of 100 (Notable)
Lukojanov	Russia	Record high maximum temperature	26.5 C (79.7 F)	34 of 100 (Routine)
Vinnytsia	Ukraine	Record high maximum temperature	27.7 C (81.9 F)	34 of 100 (Routine)
Kutaisi	Georgia	Record high maximum temperature	35.6 C (96.1 F)	33 of 100 (Routine)
Umba	Russia	Record high minimum temperature	10.9 C (51.6 F)	33 of 100 (Routine)
Sarapul	Russia	Record high maximum temperature	25.8 C (78.4 F)	33 of 100 (Routine)
Frolovo	Russia	Record high maximum temperature	32.3 C (90.1 F)	33 of 100 (Routine)
Dnipropetrovsk	Ukraine	Record high maximum temperature	32.5 C (90.5 F)	33 of 100 (Routine)
Cape Leeuwin	Australia	Record high maximum temperature	27.6 C (81.7 F)	32 of 100 (Routine)
Volshskiy Gmo	Russia	Record high maximum temperature	32.5 C (90.5 F)	32 of 100 (Routine)
Culpanovo	Russia	Record high maximum temperature	28.7 C (83.7 F)	32 of 100 (Routine)
Aleksandrov Gaj	Russia	Record high maximum temperature	32.7 C (90.9 F)	32 of 100 (Routine)
Armavir	Russia	Record high maximum temperature	32.9 C (91.2 F)	32 of 100 (Routine)
Del Norte 3ENE	United States	Record high minimum temperature	8.9 C (48.0 F)	32 of 100 (Routine)
Leo 6 SW	United States	Record high maximum temperature	29.4 C (84.9 F)	32 of 100 (Routine)

Counts by Type and Timescale

587 records

Records set or tied on 23 September 2015 by type: Highest daily maximum 227, Lowest daily maximum 37, Highest daily minimum 199, Lowest daily minimum 36, Heaviest daily rainfall 87, Deepest snow cover 1.

Records on 23 September 2015 by type
Record type	Records
Highest daily maximum	227
Lowest daily maximum	37
Highest daily minimum	199
Lowest daily minimum	36
Heaviest daily rainfall	87
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 23 September 2015 by timescale: all-time 0, monthly 7, daily 580.

How Much Records Were Beaten By

490 broken records

Margins by which the 490 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 104.7. Ties are not counted.

Top 20 by Significance

23 September 2015

Top 20 records on 23 September 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 September 2015	Mosquero 1 NE, US	daily rain	65.0 mm (2.6 in)	49.8 mm (2.0 in)	88 years	72 of 100 (Major)
23 September 2015	Audubon, US	daily rain	116.1 mm (4.6 in)	46.8 mm (1.8 in)	112 years	70 of 100 (Major)
23 September 2015	Wakefield 3NW, US	daily rain	61.0 mm (2.4 in)	38.1 mm (1.5 in)	94 years	65 of 100 (Major)
23 September 2015	Valentine Miller Fld AP, US	monthly rain	90.9 mm (3.6 in)	28.7 mm (1.1 in)	41 years	64 of 100 (Major)
23 September 2015	San Andres (Isla)/S, CO	daily rain	116.1 mm (4.6 in)	95.1 mm (3.7 in)	48 years	59 of 100 (Notable)
23 September 2015	Friona, US	daily rain	64.3 mm (2.5 in)	42.2 mm (1.7 in)	44 years	59 of 100 (Notable)
23 September 2015	Kealakekua 26.2, US	daily high min	21.1 C (70.0 F)	2.2 C (4.0 F)	102 years	59 of 100 (Notable)
23 September 2015	Keshan, CN	daily rain	49.5 mm (1.9 in)	26.7 mm (1.1 in)	46 years	54 of 100 (Notable)
23 September 2015	Purdum, US	daily rain	62.2 mm (2.4 in)	43.9 mm (1.7 in)	10 years	53 of 100 (Notable)
23 September 2015	Omaha Eppley Airfield, US	daily rain	145.8 mm (5.7 in)	104.7 mm (4.1 in)	18 years	51 of 100 (Notable)
23 September 2015	Walthill 1E, US	daily rain	45.2 mm (1.8 in)	22.3 mm (0.9 in)	77 years	50 of 100 (Notable)
23 September 2015	Forman 5 SSE, US	daily rain	54.1 mm (2.1 in)	38.1 mm (1.5 in)	10 years	49 of 100 (Notable)
23 September 2015	Butte, US	daily rain	69.1 mm (2.7 in)	18.3 mm (0.7 in)	80 years	48 of 100 (Notable)
23 September 2015	Kon-Kolodez, RU	daily high max	30.8 C (87.4 F)	3.1 C (5.6 F)	121 years	45 of 100 (Notable)
23 September 2015	Bogoroditskoye-Fenino, RU	daily high max	29.9 C (85.8 F)	3.9 C (7.0 F)	90 years	44 of 100 (Notable)
23 September 2015	Valentine Nwr, US	monthly rain	94.2 mm (3.7 in)	6.8 mm (0.27 in)	67 years	44 of 100 (Notable)
23 September 2015	Tyndall, US	daily rain	83.3 mm (3.3 in)	37.6 mm (1.5 in)	10 years	44 of 100 (Notable)
23 September 2015	Poretskoye, RU	daily high max	28.8 C (83.8 F)	3.6 C (6.5 F)	90 years	43 of 100 (Notable)
23 September 2015	Cekunda, RU	daily rain	32.2 mm (1.3 in)	13.9 mm (0.5 in)	56 years	43 of 100 (Notable)
23 September 2015	Poltava, UA	daily high max	30.7 C (87.3 F)	3.3 C (5.9 F)	90 years	43 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

1793 to 2015

Records set or tied on this calendar date in each year from 1793 to 2015. 2015 had 587 records.

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

Records on 09-23 in each year
Year	Records
1793	1
1796	1
1799	1
1804	1
1832	1
1835	1
1838	1
1842	3
1843	1
1845	2
1848	1
1849	1
1850	1
1851	2
1854	3
1855	1
1859	2
1864	1
1865	1
1866	1
1868	1
1871	1
1872	1
1874	1
1875	1
1876	1
1877	1
1881	4
1882	2
1885	1
1886	1
1887	1
1888	1
1889	3
1890	2
1891	1
1892	2
1893	4
1895	9
1896	5
1897	1
1898	2
1899	4
1900	4
1901	2
1902	6
1903	7
1904	19
1905	6
1906	6
1907	19
1908	19
1909	15
1910	8
1911	11
1912	15
1913	22
1914	29
1915	25
1916	324
1917	56
1918	34
1919	40
1920	44
1921	47
1922	34
1923	74
1924	194
1925	223
1926	459
1927	247
1928	382
1929	198
1930	472
1931	600
1932	383
1933	281
1934	361
1935	239
1936	377
1937	557
1938	389
1939	279
1940	374
1941	490
1942	557
1943	322
1944	381
1945	652
1946	623
1947	803
1948	259
1949	496
1950	267
1951	462
1952	432
1953	271
1954	324
1955	852
1956	299
1957	539
1958	641
1959	307
1960	470
1961	670
1962	344
1963	568
1964	322
1965	783
1966	528
1967	341
1968	481
1969	450
1970	1,457
1971	578
1972	461
1973	674
1974	1,543
1975	1,038
1976	463
1977	616
1978	500
1979	586
1980	1,037
1981	717
1982	775
1983	1,744
1984	1,121
1985	924
1986	740
1987	1,077
1988	653
1989	1,376
1990	702
1991	519
1992	976
1993	983
1994	1,140
1995	1,868
1996	809
1997	1,060
1998	1,326
1999	1,207
2000	2,026
2001	790
2002	930
2003	1,243
2004	986
2005	1,207
2006	1,509
2007	1,153
2008	835
2009	1,201
2010	1,360
2011	666
2012	785
2013	573
2014	595
2015	587
2016	774
2017	1,371
2018	693
2019	565
2020	618
2021	602
2022	551
2023	812
2024	499
2025	449
2026	384

Download the Data

Data for records on 2015-09-23: 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	472
20 to 40	12
40 to 60	4
60 to 80	0
80 to 100	1
100 to 120	1