Weather Records on 1 September 1986

964 weather records were set or tied worldwide on 1 September 1986. Highest significance: Sandy Lake Dam Libby, US.

Key Facts for 1 September 1986

On 1 September 1986, 964 weather records were set or tied at long-record stations worldwide.
119 were record highs and 620 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 32 monthly and 927 daily.
Sandy Lake Dam Libby set a monthly record daily precipitation of 107.7 mm (4.2 in) on 1 September 1986.
Across 161 earlier years (1797 to 2026) the same calendar date averaged 438 records.

Record Map

964 stations

964 station records on 1 September 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 September 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sandy Lake Dam Libby	United States	Record daily precipitation	107.7 mm (4.2 in)	76 of 100 (Major)
Rome	United States	Record low maximum temperature	17.8 C (64.0 F)	50 of 100 (Notable)
Boerne	United States	Record daily precipitation	75.4 mm (3.0 in)	50 of 100 (Notable)
Valley of Lagoons	Australia	Record daily precipitation	41.0 mm (1.6 in)	49 of 100 (Notable)
St. Petersburg	Russia	Record daily precipitation	28.2 mm (1.1 in)	49 of 100 (Notable)
Troy 1 SE	United States	Record daily precipitation	51.8 mm (2.0 in)	49 of 100 (Notable)
Elk City 4 W	United States	Record daily precipitation	77.0 mm (3.0 in)	49 of 100 (Notable)
Webster	United States	Record daily precipitation	49.3 mm (1.9 in)	49 of 100 (Notable)
Valley Head	United States	Record low maximum temperature	17.8 C (64.0 F)	48 of 100 (Notable)
Beaver	United States	Record low maximum temperature	16.7 C (62.1 F)	48 of 100 (Notable)
Cheyenne Wells 2NE	United States	Record daily precipitation	55.9 mm (2.2 in)	47 of 100 (Notable)
Clanton	United States	Record low maximum temperature	20.6 C (69.1 F)	45 of 100 (Notable)
Pauls Valley 4 WSW	United States	Record low maximum temperature	19.4 C (66.9 F)	45 of 100 (Notable)
Vernon	United States	Record daily precipitation	78.7 mm (3.1 in)	45 of 100 (Notable)
Indiga	Russia	Record daily precipitation	26.5 mm (1.0 in)	44 of 100 (Notable)
Waynesboro 2 S	United States	Record low maximum temperature	19.4 C (66.9 F)	44 of 100 (Notable)
Altus Dam	United States	Record daily precipitation	58.4 mm (2.3 in)	44 of 100 (Notable)
Thomasville	United States	Record low maximum temperature	20.6 C (69.1 F)	43 of 100 (Notable)
Cartersville	United States	Record low maximum temperature	20.6 C (69.1 F)	43 of 100 (Notable)
Balbay	Kyrgyzstan	Record daily precipitation	41.4 mm (1.6 in)	42 of 100 (Notable)
Livingston	United States	Record low maximum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Moose Lake 1 SSE	United States	Record daily precipitation	41.9 mm (1.6 in)	42 of 100 (Notable)
Chandler	United States	Record low maximum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Mc Intosh 6 SE	United States	Record daily precipitation	74.2 mm (2.9 in)	42 of 100 (Notable)
Upper Stone Exelby	Australia	Record daily precipitation	33.4 mm (1.3 in)	41 of 100 (Notable)
Putbus	Germany	Record low maximum temperature	13.7 C (56.7 F)	41 of 100 (Notable)
Pulaski 2 E	United States	Record daily precipitation	41.9 mm (1.6 in)	41 of 100 (Notable)
Sedan	United States	Record low maximum temperature	22.2 C (72.0 F)	40 of 100 (Notable)
Hattiesburg 5SW	United States	Record low maximum temperature	23.9 C (75.0 F)	40 of 100 (Notable)
Walters	United States	Record low maximum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Henrietta	United States	Record daily precipitation	87.1 mm (3.4 in)	40 of 100 (Notable)
Highland Home	United States	Record low maximum temperature	21.1 C (70.0 F)	39 of 100 (Notable)
Tuscaloosa Oliver Dam	United States	Record low maximum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Glenwood Spgs #2	United States	Record low maximum temperature	18.3 C (64.9 F)	39 of 100 (Notable)
Cedartown	United States	Record low maximum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
W Pt	United States	Record daily precipitation	48.3 mm (1.9 in)	39 of 100 (Notable)
Electra	United States	Record daily precipitation	57.9 mm (2.3 in)	39 of 100 (Notable)
Llano	United States	Record daily precipitation	53.3 mm (2.1 in)	39 of 100 (Notable)
Enisejsk	Russia	Record high minimum temperature	13.7 C (56.7 F)	38 of 100 (Notable)
Fowler 1 SE	United States	Record daily precipitation	29.0 mm (1.1 in)	38 of 100 (Notable)
Naples	United States	Record high maximum temperature	37.2 C (99.0 F)	38 of 100 (Notable)
Adrian 2 NNE	United States	Record low minimum temperature	3.9 C (39.0 F)	38 of 100 (Notable)
Detroit Lakes 1 NNE	United States	Record daily precipitation	52.6 mm (2.1 in)	38 of 100 (Notable)
Pine Rvr Dam	United States	Record daily precipitation	31.2 mm (1.2 in)	38 of 100 (Notable)
Hammon 3 SSW	United States	Record daily precipitation	63.5 mm (2.5 in)	38 of 100 (Notable)
Henrietta	United States	Record low maximum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Farmville	United States	Record low maximum temperature	19.4 C (66.9 F)	38 of 100 (Notable)
Evergreen	United States	Record low maximum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Oneonta	United States	Record low maximum temperature	19.4 C (66.9 F)	37 of 100 (Notable)
Hershey 5 SSE	United States	Record daily precipitation	35.1 mm (1.4 in)	37 of 100 (Notable)
Meeker 5 W	United States	Record low maximum temperature	20.6 C (69.1 F)	37 of 100 (Notable)
Saluda	United States	Record low maximum temperature	18.9 C (66.0 F)	37 of 100 (Notable)
W Pt	United States	Record low maximum temperature	20.0 C (68.0 F)	36 of 100 (Notable)
Ingomar 9 E	United States	Record daily precipitation	44.7 mm (1.8 in)	36 of 100 (Notable)
Southport 5 N	United States	Record low maximum temperature	22.2 C (72.0 F)	36 of 100 (Notable)
Bowie	United States	Record daily precipitation	77.5 mm (3.1 in)	36 of 100 (Notable)
Canadian	United States	Record low maximum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
Greifswald	Germany	Record low maximum temperature	14.3 C (57.7 F)	35 of 100 (Notable)
Tihvin	Russia	Record daily precipitation	26.6 mm (1.0 in)	35 of 100 (Notable)
Warden (Mag)	South Africa	Record daily precipitation	28.0 mm (1.1 in)	35 of 100 (Notable)

Counts by Type and Timescale

964 records

Records set or tied on 1 September 1986 by type: Highest daily maximum 60, Lowest daily maximum 461, Highest daily minimum 59, Lowest daily minimum 159, Heaviest daily rainfall 225.

Records on 1 September 1986 by type
Record type	Records
Highest daily maximum	60
Lowest daily maximum	461
Highest daily minimum	59
Lowest daily minimum	159
Heaviest daily rainfall	225
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 September 1986 by timescale: all-time 5, monthly 32, daily 927.

How Much Records Were Beaten By

794 broken records

Margins by which the 794 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 58.9. Ties are not counted.

Top 20 by Significance

1 September 1986

Top 20 records on 1 September 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 September 1986	Sandy Lake Dam Libby, US	monthly rain	107.7 mm (4.2 in)	50.8 mm (2.0 in)	57 years	76 of 100 (Major)
1 September 1986	Rome, US	daily low max	17.8 C (64.0 F)	6.1 C (11.0 F)	87 years	50 of 100 (Notable)
1 September 1986	Boerne, US	daily rain	75.4 mm (3.0 in)	39.8 mm (1.6 in)	80 years	50 of 100 (Notable)
1 September 1986	Valley of Lagoons, AU	daily rain	41.0 mm (1.6 in)	34.9 mm (1.4 in)	32 years	49 of 100 (Notable)
1 September 1986	St. Petersburg, RU	daily rain	28.2 mm (1.1 in)	9.8 mm (0.39 in)	64 years	49 of 100 (Notable)
1 September 1986	Troy 1 SE, US	daily rain	51.8 mm (2.0 in)	40.1 mm (1.6 in)	23 years	49 of 100 (Notable)
1 September 1986	Elk City 4 W, US	daily rain	77.0 mm (3.0 in)	55.4 mm (2.2 in)	4 years	49 of 100 (Notable)
1 September 1986	Webster, US	daily rain	49.3 mm (1.9 in)	26.4 mm (1.0 in)	27 years	49 of 100 (Notable)
1 September 1986	Valley Head, US	daily low max	17.8 C (64.0 F)	5.5 C (9.9 F)	87 years	48 of 100 (Notable)
1 September 1986	Beaver, US	daily low max	16.7 C (62.1 F)	8.3 C (14.9 F)	84 years	48 of 100 (Notable)
1 September 1986	Cheyenne Wells 2NE, US	daily rain	55.9 mm (2.2 in)	31.5 mm (1.2 in)	44 years	47 of 100 (Notable)
1 September 1986	Clanton, US	daily low max	20.6 C (69.1 F)	6.1 C (11.0 F)	71 years	45 of 100 (Notable)
1 September 1986	Pauls Valley 4 WSW, US	daily low max	19.4 C (66.9 F)	7.8 C (14.0 F)	69 years	45 of 100 (Notable)
1 September 1986	Vernon, US	daily rain	78.7 mm (3.1 in)	58.9 mm (2.3 in)	12 years	45 of 100 (Notable)
1 September 1986	Indiga, RU	daily rain	26.5 mm (1.0 in)	8.6 mm (0.34 in)	48 years	44 of 100 (Notable)
1 September 1986	Waynesboro 2 S, US	daily low max	19.4 C (66.9 F)	5.6 C (10.1 F)	71 years	44 of 100 (Notable)
1 September 1986	Altus Dam, US	daily rain	58.4 mm (2.3 in)	40.1 mm (1.6 in)	40 years	44 of 100 (Notable)
1 September 1986	Thomasville, US	daily low max	20.6 C (69.1 F)	5.5 C (9.9 F)	68 years	43 of 100 (Notable)
1 September 1986	Cartersville, US	daily low max	20.6 C (69.1 F)	3.3 C (5.9 F)	87 years	43 of 100 (Notable)
1 September 1986	Balbay, KG	daily rain	41.4 mm (1.6 in)	23.6 mm (0.9 in)	21 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

1797 to 1986

Records set or tied on this calendar date in each year from 1797 to 1986. 1986 had 964 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 1986-09-01: 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).

Histogram of margins by which records were beaten on 1 September 1986
Margin	Records
0 to 10	705
10 to 20	44
20 to 30	24
30 to 40	10
40 to 50	7
50 to 60	4