Weather Records on 31 August 2009

1,224 weather records were set or tied worldwide on 31 August 2009. Highest significance: Begumpet Obsy, IN.

Key Facts for 31 August 2009

On 31 August 2009, 1,224 weather records were set or tied at long-record stations worldwide.
344 were record highs and 744 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 68 monthly and 1,156 daily.
Begumpet Obsy set a daily record precipitation of 101.1 mm (4.0 in) on 31 August 2009.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 431 records.

Record Map

1,224 stations

1,224 station records on 31 August 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Begumpet Obsy	India	Record daily precipitation	101.1 mm (4.0 in)	68 of 100 (Major)
Buhta Providenja	Russia	Record daily precipitation	66.1 mm (2.6 in)	60 of 100 (Major)
Saltillo	Mexico	Record daily precipitation	53.8 mm (2.1 in)	55 of 100 (Notable)
Portland	Australia	Record daily precipitation	30.0 mm (1.2 in)	54 of 100 (Notable)
Santa Maria del Refugio	Mexico	Record daily precipitation	30.0 mm (1.2 in)	53 of 100 (Notable)
Las Pocitas	Mexico	Record daily precipitation	77.0 mm (3.0 in)	52 of 100 (Notable)
Buenavista de Loreto	Mexico	Record daily precipitation	77.0 mm (3.0 in)	50 of 100 (Notable)
Vandalia	United States	Record low maximum temperature	19.4 C (66.9 F)	49 of 100 (Notable)
Greenfield	United States	Record low maximum temperature	16.1 C (61.0 F)	49 of 100 (Notable)
Chariton 1 E	United States	Record low maximum temperature	16.7 C (62.1 F)	48 of 100 (Notable)
Aculco (Smn)	Mexico	Record daily precipitation	56.9 mm (2.2 in)	47 of 100 (Notable)
Jopala (Cfe)	Mexico	Record daily precipitation	178.6 mm (7.0 in)	47 of 100 (Notable)
Gonzalez	Mexico	Record low minimum temperature	16.7 C (62.1 F)	47 of 100 (Notable)
San Gil	Mexico	Record daily precipitation	47.8 mm (1.9 in)	47 of 100 (Notable)
Hiram	United States	Record low maximum temperature	16.1 C (61.0 F)	47 of 100 (Notable)
Rison	United States	Record low maximum temperature	25.6 C (78.1 F)	46 of 100 (Notable)
Preston	United States	Record daily precipitation	100.1 mm (3.9 in)	46 of 100 (Notable)
Chippewa Lake	United States	Record low maximum temperature	17.2 C (63.0 F)	46 of 100 (Notable)
Audubon	United States	Record low maximum temperature	17.2 C (63.0 F)	45 of 100 (Notable)
Yates Ctr	United States	Record low maximum temperature	21.1 C (70.0 F)	45 of 100 (Notable)
Lebanon 2W	United States	Record low maximum temperature	20.0 C (68.0 F)	45 of 100 (Notable)
Trenton	United States	Record low maximum temperature	17.8 C (64.0 F)	45 of 100 (Notable)
Vallecillo (Dge)	Mexico	Record low minimum temperature	15.6 C (60.1 F)	44 of 100 (Notable)
Corning	United States	Record low maximum temperature	17.2 C (63.0 F)	44 of 100 (Notable)
Kirksville	United States	Record low maximum temperature	17.8 C (64.0 F)	44 of 100 (Notable)
Trident	United States	Record high minimum temperature	18.9 C (66.0 F)	44 of 100 (Notable)
Addison	United States	Record low maximum temperature	14.4 C (57.9 F)	44 of 100 (Notable)
Hartford Wwtp	United States	Record low maximum temperature	17.2 C (63.0 F)	44 of 100 (Notable)
El Aguajito	Mexico	Record daily precipitation	70.4 mm (2.8 in)	43 of 100 (Notable)
Tuscola	United States	Record low maximum temperature	18.9 C (66.0 F)	43 of 100 (Notable)
Fredonia	United States	Record low minimum temperature	7.2 C (45.0 F)	43 of 100 (Notable)
Hayward Rs	United States	Record low minimum temperature	0.0 C (32.0 F)	43 of 100 (Notable)
Watertown Wwtp	United States	Record low maximum temperature	17.8 C (64.0 F)	43 of 100 (Notable)
Warren 3 S	United States	Record low maximum temperature	16.7 C (62.1 F)	42 of 100 (Notable)
Bordeaux-Merignac	France	Record high maximum temperature	35.6 C (96.1 F)	41 of 100 (Notable)
Nellore	India	Record daily precipitation	70.1 mm (2.8 in)	41 of 100 (Notable)
Presa Plutarco Elias Calles	Mexico	Record daily precipitation	32.8 mm (1.3 in)	41 of 100 (Notable)
Presa la Calera	Mexico	Record low minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
El Arenal	Mexico	Record low minimum temperature	3.9 C (39.0 F)	41 of 100 (Notable)
Jinnah Intl	Pakistan	Record daily precipitation	41.4 mm (1.6 in)	41 of 100 (Notable)
Wetumpka	United States	Record low maximum temperature	24.4 C (75.9 F)	41 of 100 (Notable)
Quincy Dam 21	United States	Record low maximum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Winterset 4N	United States	Record low maximum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Wamego 4 W	United States	Record low minimum temperature	7.8 C (46.0 F)	41 of 100 (Notable)
Ludington 4 SE	United States	Record low minimum temperature	3.9 C (39.0 F)	41 of 100 (Notable)
Potosi 4 SW	United States	Record low minimum temperature	9.4 C (48.9 F)	41 of 100 (Notable)
Upper Sandusky	United States	Record low maximum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Roscoe	United States	Record low minimum temperature	9.4 C (48.9 F)	41 of 100 (Notable)
Medford	United States	Record low minimum temperature	2.8 C (37.0 F)	41 of 100 (Notable)
Platon Sanchez	Mexico	Record daily precipitation	122.7 mm (4.8 in)	40 of 100 (Notable)
Sihuapan	Mexico	Record daily precipitation	135.6 mm (5.3 in)	40 of 100 (Notable)
Rio Grande (Smn)	Mexico	Record daily precipitation	42.9 mm (1.7 in)	40 of 100 (Notable)
Springerville	United States	Record high minimum temperature	13.9 C (57.0 F)	40 of 100 (Notable)
Washington	United States	Record low maximum temperature	20.6 C (69.1 F)	40 of 100 (Notable)
Eldon	United States	Record low maximum temperature	16.7 C (62.1 F)	40 of 100 (Notable)
Fairbury 7S	United States	Record low minimum temperature	5.6 C (42.1 F)	40 of 100 (Notable)
San Ignacio	Mexico	Record daily precipitation	45.0 mm (1.8 in)	39 of 100 (Notable)
Monclova	Mexico	Record low maximum temperature	25.0 C (77.0 F)	39 of 100 (Notable)
Harrisburg	United States	Record low maximum temperature	22.8 C (73.0 F)	39 of 100 (Notable)
Fremont	United States	Record low minimum temperature	6.7 C (44.1 F)	39 of 100 (Notable)

Counts by Type and Timescale

1,224 records

Records set or tied on 31 August 2009 by type: Highest daily maximum 155, Lowest daily maximum 427, Highest daily minimum 189, Lowest daily minimum 317, Heaviest daily rainfall 136.

Records on 31 August 2009 by type
Record type	Records
Highest daily maximum	155
Lowest daily maximum	427
Highest daily minimum	189
Lowest daily minimum	317
Heaviest daily rainfall	136
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 August 2009 by timescale: all-time 0, monthly 68, daily 1,156.

How Much Records Were Beaten By

840 broken records

Margins by which the 840 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 122.7. Ties are not counted.

Top 20 by Significance

31 August 2009

Top 20 records on 31 August 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 2009	Begumpet Obsy, IN	daily rain	101.1 mm (4.0 in)	56.9 mm (2.2 in)	79 years	68 of 100 (Major)
31 August 2009	Buhta Providenja, RU	daily rain	66.1 mm (2.6 in)	40.5 mm (1.6 in)	44 years	60 of 100 (Major)
31 August 2009	Saltillo, MX	daily rain	53.8 mm (2.1 in)	37.3 mm (1.5 in)	34 years	55 of 100 (Notable)
31 August 2009	Portland, AU	daily rain	30.0 mm (1.2 in)	9.4 mm (0.37 in)	91 years	54 of 100 (Notable)
31 August 2009	Santa Maria del Refugio, MX	daily rain	30.0 mm (1.2 in)	29.2 mm (1.1 in)	44 years	53 of 100 (Notable)
31 August 2009	Las Pocitas, MX	daily rain	77.0 mm (3.0 in)	60.0 mm (2.4 in)	44 years	52 of 100 (Notable)
31 August 2009	Buenavista de Loreto, MX	daily rain	77.0 mm (3.0 in)	74.7 mm (2.9 in)	11 years	50 of 100 (Notable)
31 August 2009	Vandalia, US	daily low max	19.4 C (66.9 F)	3.4 C (6.1 F)	106 years	49 of 100 (Notable)
31 August 2009	Greenfield, US	daily low max	16.1 C (61.0 F)	3.9 C (7.0 F)	99 years	49 of 100 (Notable)
31 August 2009	Chariton 1 E, US	daily low max	16.7 C (62.1 F)	3.3 C (5.9 F)	113 years	48 of 100 (Notable)
31 August 2009	Aculco (Smn), MX	daily rain	56.9 mm (2.2 in)	39.1 mm (1.5 in)	11 years	47 of 100 (Notable)
31 August 2009	Jopala (Cfe), MX	daily rain	178.6 mm (7.0 in)	122.7 mm (4.8 in)	12 years	47 of 100 (Notable)
31 August 2009	Gonzalez, MX	daily low min	16.7 C (62.1 F)	3.9 C (7.0 F)	42 years	47 of 100 (Notable)
31 August 2009	San Gil, MX	daily rain	47.8 mm (1.9 in)	32.3 mm (1.3 in)	11 years	47 of 100 (Notable)
31 August 2009	Hiram, US	daily low max	16.1 C (61.0 F)	3.3 C (5.9 F)	94 years	47 of 100 (Notable)
31 August 2009	Rison, US	daily low max	25.6 C (78.1 F)	2.2 C (4.0 F)	106 years	46 of 100 (Notable)
31 August 2009	Preston, US	daily rain	100.1 mm (3.9 in)	72.9 mm (2.9 in)	6 years	46 of 100 (Notable)
31 August 2009	Chippewa Lake, US	daily low max	17.2 C (63.0 F)	2.2 C (4.0 F)	106 years	46 of 100 (Notable)
31 August 2009	Audubon, US	daily low max	17.2 C (63.0 F)	2.2 C (4.0 F)	113 years	45 of 100 (Notable)
31 August 2009	Yates Ctr, US	daily low max	21.1 C (70.0 F)	2.2 C (4.0 F)	113 years	45 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

1796 to 2009

Records set or tied on this calendar date in each year from 1796 to 2009. 2009 had 1,224 records.

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

Records on 08-31 in each year
Year	Records
1796	1
1806	1
1807	2
1813	1
1814	1
1816	1
1827	1
1836	1
1846	1
1849	1
1851	1
1856	2
1858	1
1859	1
1860	1
1861	1
1863	1
1867	1
1869	1
1873	1
1875	1
1876	1
1877	2
1879	2
1881	3
1882	2
1885	1
1886	5
1887	1
1889	1
1890	2
1892	3
1893	1
1894	1
1895	1
1896	1
1897	5
1898	10
1899	4
1900	3
1901	5
1902	5
1903	16
1904	13
1905	8
1906	47
1907	6
1908	12
1909	39
1910	20
1911	31
1912	34
1913	40
1914	23
1915	71
1916	7
1917	60
1918	58
1919	25
1920	46
1921	86
1922	58
1923	63
1924	232
1925	111
1926	148
1927	103
1928	201
1929	300
1930	243
1931	192
1932	807
1933	424
1934	381
1935	540
1936	226
1937	508
1938	324
1939	296
1940	400
1941	528
1942	422
1943	650
1944	638
1945	572
1946	545
1947	473
1948	367
1949	409
1950	662
1951	910
1952	388
1953	1,054
1954	633
1955	539
1956	734
1957	317
1958	417
1959	496
1960	366
1961	625
1962	432
1963	415
1964	591
1965	886
1966	830
1967	952
1968	562
1969	474
1970	558
1971	326
1972	287
1973	793
1974	587
1975	658
1976	732
1977	621
1978	891
1979	400
1980	701
1981	692
1982	586
1983	788
1984	866
1985	854
1986	1,218
1987	836
1988	570
1989	622
1990	966
1991	848
1992	1,274
1993	1,286
1994	1,139
1995	1,077
1996	1,451
1997	943
1998	1,163
1999	988
2000	1,545
2001	944
2002	852
2003	1,232
2004	963
2005	1,782
2006	1,147
2007	1,110
2008	870
2009	1,224
2010	1,490
2011	994
2012	932
2013	771
2014	458
2015	1,074
2016	599
2017	596
2018	366
2019	781
2020	737
2021	553
2022	1,191
2023	600
2024	766
2025	307
2026	595

Download the Data

Data for records on 2009-08-31: 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	801
20 to 40	23
40 to 60	10
60 to 80	5
80 to 100	0
100 to 120	0
120 to 140	1