Weather Records on 1 September 2015

661 weather records were set or tied worldwide on 1 September 2015. Highest significance: Melsom, NO.

Key Facts for 1 September 2015

On 1 September 2015, 661 weather records were set or tied at long-record stations worldwide.
393 were record highs and 79 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 138 monthly and 518 daily.
Melsom set an all-time record daily precipitation of 101.2 mm (4.0 in) on 1 September 2015.
Across 161 earlier years (1797 to 2026) the same calendar date averaged 440 records.

Record Map

661 stations

661 station records on 1 September 2015 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 September 2015: highest significance records shown on the map
Station	Country	Type	Value	Significance
Melsom	Norway	Record daily precipitation	101.2 mm (4.0 in)	62 of 100 (Major)
Asker	Norway	Record daily precipitation	52.7 mm (2.1 in)	61 of 100 (Major)
Tuddal	Norway	Record daily precipitation	76.2 mm (3.0 in)	61 of 100 (Major)
Cottbus	Germany	Record daily precipitation	29.0 mm (1.1 in)	60 of 100 (Major)
Igsi I Hobol	Norway	Record daily precipitation	47.6 mm (1.9 in)	59 of 100 (Notable)
Maridalsoset	Norway	Record daily precipitation	52.3 mm (2.1 in)	58 of 100 (Notable)
Hedal I Valdres II	Norway	Record daily precipitation	44.0 mm (1.7 in)	58 of 100 (Notable)
Casa Grande Nm	United States	Record daily precipitation	36.3 mm (1.4 in)	57 of 100 (Notable)
Hvaler	Norway	Record daily precipitation	45.0 mm (1.8 in)	54 of 100 (Notable)
Bad-Ahrweiler Neuenahr	Germany	Record daily precipitation	40.8 mm (1.6 in)	53 of 100 (Notable)
Saffle	Sweden	Record daily precipitation	49.3 mm (1.9 in)	53 of 100 (Notable)
Kiev	Ukraine	Record high maximum temperature	35.5 C (95.9 F)	53 of 100 (Notable)
Larvik	Norway	Record daily precipitation	73.8 mm (2.9 in)	52 of 100 (Notable)
Uman	Ukraine	Record high maximum temperature	36.5 C (97.7 F)	52 of 100 (Notable)
Biard	France	Record daily precipitation	70.1 mm (2.8 in)	51 of 100 (Notable)
Foldsae	Norway	Record daily precipitation	52.5 mm (2.1 in)	51 of 100 (Notable)
Tovdal	Norway	Record daily precipitation	47.5 mm (1.9 in)	51 of 100 (Notable)
Casey	United States	Record daily precipitation	91.9 mm (3.6 in)	51 of 100 (Notable)
Wien	Austria	Record high maximum temperature	33.3 C (91.9 F)	50 of 100 (Notable)
Hole	Norway	Record daily precipitation	34.2 mm (1.3 in)	50 of 100 (Notable)
Hedrum	Norway	Record daily precipitation	62.0 mm (2.4 in)	49 of 100 (Notable)
Barberey	France	Record daily precipitation	39.6 mm (1.6 in)	48 of 100 (Notable)
Skedsmo-Hellerud	Norway	Record daily precipitation	41.4 mm (1.6 in)	48 of 100 (Notable)
Attenkam	Germany	Record daily precipitation	33.7 mm (1.3 in)	47 of 100 (Notable)
Szombathely	Hungary	Record high maximum temperature	34.0 C (93.2 F)	47 of 100 (Notable)
Mogen	Norway	Record daily precipitation	30.0 mm (1.2 in)	47 of 100 (Notable)
Hurbanovo	Slovakia	Record high maximum temperature	34.0 C (93.2 F)	46 of 100 (Notable)
Kisinev	Moldova	Record high maximum temperature	36.3 C (97.3 F)	46 of 100 (Notable)
Floter	Norway	Record daily precipitation	57.4 mm (2.3 in)	46 of 100 (Notable)
Erikstad	Sweden	Record daily precipitation	34.6 mm (1.4 in)	46 of 100 (Notable)
Lviv	Ukraine	Record high maximum temperature	34.5 C (94.1 F)	46 of 100 (Notable)
Gjerstad I Aust-Agder	Norway	Record daily precipitation	49.0 mm (1.9 in)	44 of 100 (Notable)
Nancy-Ochey	France	Record daily precipitation	31.3 mm (1.2 in)	43 of 100 (Notable)
Chemnitz	Germany	Record high maximum temperature	30.7 C (87.3 F)	43 of 100 (Notable)
Kaliningrad	Russia	Record high maximum temperature	33.8 C (92.8 F)	43 of 100 (Notable)
Vinnytsia	Ukraine	Record high minimum temperature	20.1 C (68.2 F)	43 of 100 (Notable)
Liubashivka	Ukraine	Record high maximum temperature	36.7 C (98.1 F)	43 of 100 (Notable)
Oake Marsh Farm	Australia	Record daily precipitation	32.0 mm (1.3 in)	42 of 100 (Notable)
Vasilevici	Belarus	Record high maximum temperature	32.7 C (90.9 F)	42 of 100 (Notable)
Sandefjord	Norway	Record daily precipitation	88.0 mm (3.5 in)	42 of 100 (Notable)
Ed	Sweden	Record daily precipitation	28.8 mm (1.1 in)	42 of 100 (Notable)
Svaneholm	Sweden	Record daily precipitation	44.6 mm (1.8 in)	42 of 100 (Notable)
Krivoj_Rog	Ukraine	Record high maximum temperature	36.2 C (97.2 F)	42 of 100 (Notable)
Salzburg	Austria	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Regensburg	Germany	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Osijek	Croatia	Record high maximum temperature	34.6 C (94.3 F)	41 of 100 (Notable)
Uwajima	Japan	Record daily precipitation	148.1 mm (5.8 in)	41 of 100 (Notable)
Porsgrunn Brannstasjon	Norway	Record daily precipitation	35.0 mm (1.4 in)	41 of 100 (Notable)
Voznesensk	Ukraine	Record high maximum temperature	38.8 C (101.8 F)	41 of 100 (Notable)
Sonnblick	Austria	Record high minimum temperature	5.3 C (41.5 F)	40 of 100 (Notable)
Pohnpei WSO	Federated States of Micronesia	Record high minimum temperature	25.6 C (78.1 F)	40 of 100 (Notable)
Gorlitz	Germany	Record high maximum temperature	33.4 C (92.1 F)	40 of 100 (Notable)
Nora_D	Sweden	Record daily precipitation	26.4 mm (1.0 in)	40 of 100 (Notable)
Jemez Springs	United States	Record high minimum temperature	16.7 C (62.1 F)	40 of 100 (Notable)
Zheleznodorozhnyj	Belarus	Record high maximum temperature	34.9 C (94.8 F)	39 of 100 (Notable)
Rygge	Norway	Record daily precipitation	59.6 mm (2.3 in)	39 of 100 (Notable)
Hoidalen I Solum	Norway	Record daily precipitation	69.9 mm (2.8 in)	39 of 100 (Notable)
Postmyr I Drangedal	Norway	Record daily precipitation	117.8 mm (4.6 in)	39 of 100 (Notable)
Vea	Norway	Record daily precipitation	26.5 mm (1.0 in)	39 of 100 (Notable)
Bialystok	Poland	Record high maximum temperature	33.6 C (92.5 F)	39 of 100 (Notable)

Counts by Type and Timescale

661 records

Records set or tied on 1 September 2015 by type: Highest daily maximum 225, Lowest daily maximum 36, Highest daily minimum 168, Lowest daily minimum 43, Heaviest daily rainfall 189.

Records on 1 September 2015 by type
Record type	Records
Highest daily maximum	225
Lowest daily maximum	36
Highest daily minimum	168
Lowest daily minimum	43
Heaviest daily rainfall	189
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 September 2015 by timescale: all-time 5, monthly 138, daily 518.

How Much Records Were Beaten By

569 broken records

Margins by which the 569 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 71.6. Ties are not counted.

Top 20 by Significance

1 September 2015

Top 20 records on 1 September 2015 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 September 2015	Melsom, NO	all-time rain	101.2 mm (4.0 in)	23.6 mm (0.9 in)	44 years	62 of 100 (Major)
1 September 2015	Asker, NO	daily rain	52.7 mm (2.1 in)	42.0 mm (1.7 in)	52 years	61 of 100 (Major)
1 September 2015	Tuddal, NO	daily rain	76.2 mm (3.0 in)	23.4 mm (0.9 in)	80 years	61 of 100 (Major)
1 September 2015	Cottbus, DE	daily rain	29.0 mm (1.1 in)	11.0 mm (0.4 in)	118 years	60 of 100 (Major)
1 September 2015	Igsi I Hobol, NO	daily rain	47.6 mm (1.9 in)	36.4 mm (1.4 in)	44 years	59 of 100 (Notable)
1 September 2015	Maridalsoset, NO	daily rain	52.3 mm (2.1 in)	36.8 mm (1.4 in)	40 years	58 of 100 (Notable)
1 September 2015	Hedal I Valdres II, NO	daily rain	44.0 mm (1.7 in)	31.2 mm (1.2 in)	46 years	58 of 100 (Notable)
1 September 2015	Casa Grande Nm, US	daily rain	36.3 mm (1.4 in)	29.9 mm (1.2 in)	60 years	57 of 100 (Notable)
1 September 2015	Hvaler, NO	daily rain	45.0 mm (1.8 in)	30.0 mm (1.2 in)	26 years	54 of 100 (Notable)
1 September 2015	Bad-Ahrweiler Neuenahr, DE	daily rain	40.8 mm (1.6 in)	24.8 mm (1.0 in)	17 years	53 of 100 (Notable)
1 September 2015	Saffle, SE	daily rain	49.3 mm (1.9 in)	32.8 mm (1.3 in)	24 years	53 of 100 (Notable)
1 September 2015	Kiev, UA	monthly high max	35.5 C (95.9 F)	1.7 C (3.1 F)	116 years	53 of 100 (Notable)
1 September 2015	Larvik, NO	daily rain	73.8 mm (2.9 in)	61.8 mm (2.4 in)	26 years	52 of 100 (Notable)
1 September 2015	Uman, UA	monthly high max	36.5 C (97.7 F)	1.4 C (2.5 F)	127 years	52 of 100 (Notable)
1 September 2015	Biard, FR	monthly rain	70.1 mm (2.8 in)	22.3 mm (0.9 in)	15 years	51 of 100 (Notable)
1 September 2015	Foldsae, NO	daily rain	52.5 mm (2.1 in)	36.3 mm (1.4 in)	17 years	51 of 100 (Notable)
1 September 2015	Tovdal, NO	daily rain	47.5 mm (1.9 in)	20.6 mm (0.8 in)	80 years	51 of 100 (Notable)
1 September 2015	Casey, US	daily rain	91.9 mm (3.6 in)	32.0 mm (1.3 in)	64 years	51 of 100 (Notable)
1 September 2015	Wien, AT	monthly high max	33.3 C (91.9 F)	0.3 C (0.5 F)	153 years	50 of 100 (Notable)
1 September 2015	Hole, NO	daily rain	34.2 mm (1.3 in)	19.4 mm (0.8 in)	44 years	50 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

1797 to 2015

Records set or tied on this calendar date in each year from 1797 to 2015. 2015 had 661 records.

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

Records on 09-01 in each year
Year	Records
1797	1
1806	1
1819	1
1827	1
1831	1
1838	1
1851	1
1853	1
1854	1
1857	1
1858	1
1859	1
1860	2
1861	1
1865	1
1866	1
1867	2
1869	3
1871	1
1873	1
1876	2
1877	2
1878	3
1879	2
1881	5
1883	1
1886	3
1887	3
1888	2
1890	2
1892	2
1894	3
1897	4
1898	10
1899	3
1900	2
1901	14
1902	5
1903	16
1904	9
1905	6
1906	26
1907	14
1908	26
1909	34
1910	22
1911	16
1912	47
1913	32
1914	23
1915	46
1916	16
1917	24
1918	31
1919	19
1920	31
1921	46
1922	67
1923	75
1924	210
1925	127
1926	182
1927	136
1928	166
1929	324
1930	264
1931	233
1932	550
1933	622
1934	654
1935	584
1936	385
1937	502
1938	373
1939	303
1940	333
1941	497
1942	532
1943	578
1944	377
1945	497
1946	642
1947	555
1948	460
1949	1,102
1950	849
1951	668
1952	644
1953	937
1954	407
1955	413
1956	504
1957	320
1958	427
1959	519
1960	408
1961	531
1962	368
1963	416
1964	621
1965	657
1966	596
1967	1,263
1968	604
1969	493
1970	502
1971	464
1972	518
1973	874
1974	895
1975	939
1976	627
1977	500
1978	809
1979	459
1980	671
1981	649
1982	642
1983	1,167
1984	619
1985	901
1986	964
1987	909
1988	651
1989	823
1990	749
1991	687
1992	1,010
1993	1,122
1994	1,291
1995	1,165
1996	823
1997	1,161
1998	1,159
1999	925
2000	1,613
2001	904
2002	778
2003	1,254
2004	827
2005	901
2006	1,157
2007	976
2008	1,204
2009	1,003
2010	1,313
2011	1,071
2012	874
2013	775
2014	515
2015	661
2016	522
2017	686
2018	399
2019	800
2020	689
2021	751
2022	1,016
2023	720
2024	938
2025	359
2026	521

Download the Data

Data for records on 2015-09-01: 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 10	494
10 to 20	37
20 to 30	23
30 to 40	11
40 to 50	1
50 to 60	1
60 to 70	1
70 to 80	1