Weather Records on 9 August 1991

988 weather records were set or tied worldwide on 9 August 1991. Highest significance: Olean, US.

Key Facts for 9 August 1991

On 9 August 1991, 988 weather records were set or tied at long-record stations worldwide.
327 were record highs and 250 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 27 monthly and 960 daily.
Olean set a daily record precipitation of 50.3 mm (2.0 in) on 9 August 1991.
Across 156 earlier years (1798 to 2026) the same calendar date averaged 471 records.

Record Map

988 stations

988 station records on 9 August 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 August 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Olean	United States	Record daily precipitation	50.3 mm (2.0 in)	59 of 100 (Notable)
Salem	United States	Record daily precipitation	88.9 mm (3.5 in)	56 of 100 (Notable)
Oconaluftee	United States	Record daily precipitation	89.9 mm (3.5 in)	53 of 100 (Notable)
Arrozeira	Brazil	Record daily precipitation	75.0 mm (3.0 in)	52 of 100 (Notable)
Strelka Chunja	Russia	Record daily precipitation	32.6 mm (1.3 in)	49 of 100 (Notable)
Auburn	United States	Record daily precipitation	57.7 mm (2.3 in)	49 of 100 (Notable)
Aldeinha	Brazil	Record daily precipitation	26.2 mm (1.0 in)	48 of 100 (Notable)
Kotka Sunila	Finland	Record daily precipitation	39.5 mm (1.6 in)	47 of 100 (Notable)
Enterprise	United States	Record daily precipitation	62.7 mm (2.5 in)	47 of 100 (Notable)
Brackettville	United States	Record low minimum temperature	14.4 C (57.9 F)	47 of 100 (Notable)
Walhalla	Australia	Record daily precipitation	26.4 mm (1.0 in)	46 of 100 (Notable)
Bradford Cntrl Fs	United States	Record daily precipitation	43.2 mm (1.7 in)	46 of 100 (Notable)
Kouvola Anjala	Finland	Record daily precipitation	31.6 mm (1.2 in)	45 of 100 (Notable)
Hornell Almond Dam	United States	Record daily precipitation	43.9 mm (1.7 in)	45 of 100 (Notable)
Shokan Brown Station	United States	Record daily precipitation	69.1 mm (2.7 in)	45 of 100 (Notable)
Warragul	Australia	Record daily precipitation	26.2 mm (1.0 in)	43 of 100 (Notable)
Ponte Pequena	Brazil	Record daily precipitation	32.8 mm (1.3 in)	43 of 100 (Notable)
Albion	United States	Record daily precipitation	49.3 mm (1.9 in)	43 of 100 (Notable)
Howell Wwtp	United States	Record daily precipitation	34.3 mm (1.4 in)	43 of 100 (Notable)
Clay	United States	Record daily precipitation	44.5 mm (1.8 in)	43 of 100 (Notable)
Wien	Austria	Record high minimum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Kotka Rankki	Finland	Record daily precipitation	43.1 mm (1.7 in)	42 of 100 (Notable)
Oceanside Marina	United States	Record low maximum temperature	18.3 C (64.9 F)	42 of 100 (Notable)
Brownsville	United States	Record daily precipitation	52.1 mm (2.1 in)	42 of 100 (Notable)
Kouvola Utti Lentoportintie	Finland	Record daily precipitation	29.3 mm (1.2 in)	41 of 100 (Notable)
Mikkeli Lentoasema	Finland	Record daily precipitation	60.1 mm (2.4 in)	41 of 100 (Notable)
Newark Ag Farm	United States	Record daily precipitation	39.1 mm (1.5 in)	41 of 100 (Notable)
Naalehu 14	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Waialua 847	United States	Record high minimum temperature	24.4 C (75.9 F)	41 of 100 (Notable)
Mikkeli Anttola Pihlajasalo	Finland	Record daily precipitation	29.4 mm (1.2 in)	40 of 100 (Notable)
Kokomo 3 WSW	United States	Record low maximum temperature	20.6 C (69.1 F)	40 of 100 (Notable)
Northwood	United States	Record low maximum temperature	18.3 C (64.9 F)	40 of 100 (Notable)
Salisbury	United States	Record daily precipitation	99.1 mm (3.9 in)	40 of 100 (Notable)
Timburi	Brazil	Record daily precipitation	30.9 mm (1.2 in)	39 of 100 (Notable)
Anjalankoski Rautakorpi	Finland	Record daily precipitation	31.0 mm (1.2 in)	39 of 100 (Notable)
Leninskoe	Russia	Record daily precipitation	62.1 mm (2.4 in)	39 of 100 (Notable)
Marion 2 N	United States	Record low maximum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Ida Grove 5NW	United States	Record low maximum temperature	20.6 C (69.1 F)	39 of 100 (Notable)
Jesus del Monte	Mexico	Record daily precipitation	40.1 mm (1.6 in)	38 of 100 (Notable)
Oracle 2 SE	United States	Record daily precipitation	49.0 mm (1.9 in)	38 of 100 (Notable)
Bliss 4 NW	United States	Record high maximum temperature	40.0 C (104.0 F)	38 of 100 (Notable)
Oswego 1 N	United States	Record daily precipitation	51.1 mm (2.0 in)	38 of 100 (Notable)
Aurora	United States	Record low maximum temperature	23.3 C (73.9 F)	38 of 100 (Notable)
Rex 1 S	United States	Record daily precipitation	25.9 mm (1.0 in)	38 of 100 (Notable)
Portage Wwtp	United States	Record low maximum temperature	19.4 C (66.9 F)	38 of 100 (Notable)
Knoxville AP	United States	Record daily precipitation	44.5 mm (1.8 in)	38 of 100 (Notable)
Hailun	China	Record daily precipitation	57.9 mm (2.3 in)	37 of 100 (Notable)
Zugspitze	Germany	Record high maximum temperature	12.3 C (54.1 F)	37 of 100 (Notable)
Atil	Mexico	Record low minimum temperature	10.6 C (51.1 F)	37 of 100 (Notable)
Guayama 1SW	Puerto Rico [United States]	Record high minimum temperature	27.2 C (81.0 F)	37 of 100 (Notable)
La Belle	United States	Record high minimum temperature	25.0 C (77.0 F)	37 of 100 (Notable)
Sac City	United States	Record low maximum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Hutchinson 1 N	United States	Record low maximum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Bolivar	United States	Record daily precipitation	34.0 mm (1.3 in)	37 of 100 (Notable)
Marion	United States	Record low maximum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Lapa	Brazil	Record daily precipitation	27.5 mm (1.1 in)	36 of 100 (Notable)
Cherdyn'	Russia	Record daily precipitation	30.7 mm (1.2 in)	36 of 100 (Notable)
Rushville	United States	Record low maximum temperature	21.7 C (71.1 F)	36 of 100 (Notable)
Waverly	United States	Record low maximum temperature	23.9 C (75.0 F)	36 of 100 (Notable)
Buckeye	United States	Record daily precipitation	45.7 mm (1.8 in)	36 of 100 (Notable)

Counts by Type and Timescale

988 records

Records set or tied on 9 August 1991 by type: Highest daily maximum 127, Lowest daily maximum 168, Highest daily minimum 200, Lowest daily minimum 82, Heaviest daily rainfall 411.

Records on 9 August 1991 by type
Record type	Records
Highest daily maximum	127
Lowest daily maximum	168
Highest daily minimum	200
Lowest daily minimum	82
Heaviest daily rainfall	411
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 9 August 1991 by timescale: all-time 1, monthly 27, daily 960.

How Much Records Were Beaten By

781 broken records

Margins by which the 781 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.3. Ties are not counted.

Top 20 by Significance

9 August 1991

Top 20 records on 9 August 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 August 1991	Olean, US	daily rain	50.3 mm (2.0 in)	27.4 mm (1.1 in)	72 years	59 of 100 (Notable)
9 August 1991	Salem, US	daily rain	88.9 mm (3.5 in)	65.3 mm (2.6 in)	24 years	56 of 100 (Notable)
9 August 1991	Oconaluftee, US	monthly rain	89.9 mm (3.5 in)	31.2 mm (1.2 in)	26 years	53 of 100 (Notable)
9 August 1991	Arrozeira, BR	daily rain	75.0 mm (3.0 in)	57.8 mm (2.3 in)	44 years	52 of 100 (Notable)
9 August 1991	Strelka Chunja, RU	daily rain	32.6 mm (1.3 in)	21.8 mm (0.9 in)	20 years	49 of 100 (Notable)
9 August 1991	Auburn, US	daily rain	57.7 mm (2.3 in)	20.6 mm (0.8 in)	60 years	49 of 100 (Notable)
9 August 1991	Aldeinha, BR	daily rain	26.2 mm (1.0 in)	23.3 mm (0.9 in)	10 years	48 of 100 (Notable)
9 August 1991	Kotka Sunila, FI	daily rain	39.5 mm (1.6 in)	25.7 mm (1.0 in)	28 years	47 of 100 (Notable)
9 August 1991	Enterprise, US	daily rain	62.7 mm (2.5 in)	45.7 mm (1.8 in)	25 years	47 of 100 (Notable)
9 August 1991	Brackettville, US	daily low min	14.4 C (57.9 F)	2.8 C (5.0 F)	82 years	47 of 100 (Notable)
9 August 1991	Walhalla, AU	daily rain	26.4 mm (1.0 in)	8.4 mm (0.33 in)	91 years	46 of 100 (Notable)
9 August 1991	Bradford Cntrl Fs, US	daily rain	43.2 mm (1.7 in)	18.3 mm (0.7 in)	66 years	46 of 100 (Notable)
9 August 1991	Kouvola Anjala, FI	daily rain	31.6 mm (1.2 in)	21.1 mm (0.8 in)	28 years	45 of 100 (Notable)
9 August 1991	Hornell Almond Dam, US	daily rain	43.9 mm (1.7 in)	35.8 mm (1.4 in)	16 years	45 of 100 (Notable)
9 August 1991	Shokan Brown Station, US	daily rain	69.1 mm (2.7 in)	50.6 mm (2.0 in)	25 years	45 of 100 (Notable)
9 August 1991	Warragul, AU	daily rain	26.2 mm (1.0 in)	7.4 mm (0.29 in)	77 years	43 of 100 (Notable)
9 August 1991	Ponte Pequena, BR	daily rain	32.8 mm (1.3 in)	30.8 mm (1.2 in)	22 years	43 of 100 (Notable)
9 August 1991	Albion, US	daily rain	49.3 mm (1.9 in)	13.7 mm (0.5 in)	70 years	43 of 100 (Notable)
9 August 1991	Howell Wwtp, US	daily rain	34.3 mm (1.4 in)	6.4 mm (0.25 in)	93 years	43 of 100 (Notable)
9 August 1991	Clay, US	daily rain	44.5 mm (1.8 in)	23.7 mm (0.9 in)	53 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

1798 to 1991

Records set or tied on this calendar date in each year from 1798 to 1991. 1991 had 988 records.

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

Records on 08-09 in each year
Year	Records
1798	2
1800	1
1838	1
1845	3
1856	1
1859	3
1861	1
1863	2
1868	1
1870	1
1871	1
1873	1
1875	1
1878	1
1881	3
1884	2
1886	1
1887	1
1888	1
1889	1
1890	1
1891	4
1892	4
1893	3
1894	3
1895	1
1896	3
1897	7
1898	12
1899	4
1900	8
1901	3
1902	3
1903	6
1904	9
1905	5
1906	15
1907	9
1908	9
1909	51
1910	16
1911	44
1912	47
1913	76
1914	21
1915	61
1916	37
1917	46
1918	210
1919	49
1920	289
1921	36
1922	70
1923	73
1924	143
1925	307
1926	142
1927	391
1928	220
1929	127
1930	570
1931	399
1932	194
1933	250
1934	654
1935	587
1936	519
1937	351
1938	379
1939	480
1940	455
1941	372
1942	527
1943	366
1944	647
1945	365
1946	307
1947	544
1948	440
1949	715
1950	407
1951	405
1952	317
1953	363
1954	377
1955	433
1956	278
1957	347
1958	417
1959	453
1960	459
1961	347
1962	636
1963	500
1964	755
1965	632
1966	568
1967	457
1968	1,037
1969	527
1970	751
1971	543
1972	1,089
1973	547
1974	660
1975	790
1976	883
1977	453
1978	784
1979	630
1980	945
1981	941
1982	935
1983	839
1984	683
1985	714
1986	509
1987	927
1988	625
1989	2,082
1990	799
1991	988
1992	1,699
1993	702
1994	1,097
1995	1,417
1996	864
1997	1,446
1998	969
1999	1,370
2000	1,237
2001	1,485
2002	1,167
2003	1,344
2004	941
2005	1,001
2006	828
2007	1,687
2008	667
2009	1,028
2010	1,393
2011	1,177
2012	843
2013	761
2014	531
2015	595
2016	634
2017	773
2018	972
2019	717
2020	643
2021	523
2022	793
2023	820
2024	952
2025	799
2026	1,019

Download the Data

Data for records on 1991-08-09: 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	615
10 to 20	110
20 to 30	40
30 to 40	10
40 to 50	2
50 to 60	2
60 to 70	2