Weather Records on 1 August 2009

932 weather records were set or tied worldwide on 1 August 2009. Highest significance: Presa la Calera, MX.

Key Facts for 1 August 2009

On 1 August 2009, 932 weather records were set or tied at long-record stations worldwide.
500 were record highs and 282 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 62 monthly and 869 daily.
Presa la Calera set a monthly record low minimum temperature of 15.6 C (60.1 F) on 1 August 2009.
Across 164 earlier years (1797 to 2026) the same calendar date averaged 438 records.

Record Map

932 stations

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

Weather records on 1 August 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Presa la Calera	Mexico	Record low minimum temperature	15.6 C (60.1 F)	62 of 100 (Major)
Superior	United States	Record low minimum temperature	8.9 C (48.0 F)	49 of 100 (Notable)
Flatonia 4SE	United States	Record high minimum temperature	27.2 C (81.0 F)	49 of 100 (Notable)
Ellsworth	United States	Record low minimum temperature	6.7 C (44.1 F)	48 of 100 (Notable)
Rugby	United States	Record low maximum temperature	18.3 C (64.9 F)	48 of 100 (Notable)
Huntsville	United States	Record low maximum temperature	28.3 C (82.9 F)	48 of 100 (Notable)
Haines AP	United States	Record high minimum temperature	14.4 C (57.9 F)	46 of 100 (Notable)
Beeville 5 NE	United States	Record high minimum temperature	26.7 C (80.1 F)	45 of 100 (Notable)
Falfurrias	United States	Record high minimum temperature	27.2 C (81.0 F)	45 of 100 (Notable)
N Loup	United States	Record low minimum temperature	6.7 C (44.1 F)	44 of 100 (Notable)
Ferris	United States	Record daily precipitation	78.5 mm (3.1 in)	44 of 100 (Notable)
Cuddalore	India	Record daily precipitation	70.1 mm (2.8 in)	43 of 100 (Notable)
San Agustin Metziquititlan	Mexico	Record high maximum temperature	35.0 C (95.0 F)	43 of 100 (Notable)
Rison	United States	Record low maximum temperature	25.6 C (78.1 F)	43 of 100 (Notable)
Norwich	United States	Record low maximum temperature	25.6 C (78.1 F)	42 of 100 (Notable)
New Ulm 2 SE	United States	Record low maximum temperature	21.1 C (70.0 F)	42 of 100 (Notable)
New Caney 2 E	United States	Record daily precipitation	69.3 mm (2.7 in)	42 of 100 (Notable)
Hardy	United States	Record low maximum temperature	27.2 C (81.0 F)	41 of 100 (Notable)
Norton Dam	United States	Record daily precipitation	71.1 mm (2.8 in)	41 of 100 (Notable)
Jordan	United States	Record low minimum temperature	3.9 C (39.0 F)	41 of 100 (Notable)
Fairbury 7S	United States	Record low minimum temperature	9.4 C (48.9 F)	41 of 100 (Notable)
Bend	United States	Record high maximum temperature	37.2 C (99.0 F)	41 of 100 (Notable)
Heppner	United States	Record high maximum temperature	38.3 C (100.9 F)	41 of 100 (Notable)
Redig 11 NE	United States	Record low minimum temperature	3.9 C (39.0 F)	41 of 100 (Notable)
Branchland 1 N	United States	Record daily precipitation	49.3 mm (1.9 in)	41 of 100 (Notable)
Huntsville Intnl AP	United States	Record daily precipitation	54.4 mm (2.1 in)	41 of 100 (Notable)
Clarinda	United States	Record low minimum temperature	8.9 C (48.0 F)	40 of 100 (Notable)
Mullen 3S	United States	Record low minimum temperature	7.2 C (45.0 F)	40 of 100 (Notable)
Purdum	United States	Record low minimum temperature	7.2 C (45.0 F)	40 of 100 (Notable)
Bay City Wtr Wks	United States	Record high minimum temperature	26.1 C (79.0 F)	40 of 100 (Notable)
Portaceli	Mexico	Record daily precipitation	61.0 mm (2.4 in)	39 of 100 (Notable)
Wamego 4 W	United States	Record low minimum temperature	12.2 C (54.0 F)	39 of 100 (Notable)
Dalecarlia Rsvr	United States	Record daily precipitation	94.0 mm (3.7 in)	39 of 100 (Notable)
Ewing	United States	Record low minimum temperature	5.0 C (41.0 F)	39 of 100 (Notable)
Pierce 1 E	United States	Record high minimum temperature	26.1 C (79.0 F)	39 of 100 (Notable)
Huejotzingo	Mexico	Record low maximum temperature	17.8 C (64.0 F)	38 of 100 (Notable)
Fraccionamiento Callejones	Mexico	Record low maximum temperature	25.0 C (77.0 F)	38 of 100 (Notable)
Burlington	United States	Record daily precipitation	80.8 mm (3.2 in)	38 of 100 (Notable)
Troy L&D	United States	Record daily precipitation	44.7 mm (1.8 in)	38 of 100 (Notable)
Three Lynx	United States	Record high minimum temperature	17.2 C (63.0 F)	38 of 100 (Notable)
Lanzarote/Aeropuerto	Spain	Record high maximum temperature	39.0 C (102.2 F)	37 of 100 (Notable)
Condon	United States	Record high maximum temperature	36.7 C (98.1 F)	37 of 100 (Notable)
Nixon	United States	Record high minimum temperature	26.7 C (80.1 F)	37 of 100 (Notable)
Rochester Intl AP	United States	Record low maximum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Presa Colorines (Cfe)	Mexico	Record high minimum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
Guadalupe Victoria	Mexico	Record high minimum temperature	15.0 C (59.0 F)	36 of 100 (Notable)
Acajete	Mexico	Record low minimum temperature	1.7 C (35.1 F)	36 of 100 (Notable)
Sells	United States	Record high minimum temperature	26.1 C (79.0 F)	36 of 100 (Notable)
Cushing	United States	Record low minimum temperature	10.0 C (50.0 F)	36 of 100 (Notable)
Dufur	United States	Record high maximum temperature	39.4 C (102.9 F)	36 of 100 (Notable)
Anahuac	United States	Record low minimum temperature	16.7 C (62.1 F)	36 of 100 (Notable)
Cuero	United States	Record high minimum temperature	26.7 C (80.1 F)	36 of 100 (Notable)
Samaria	Mexico	Record high minimum temperature	26.1 C (79.0 F)	35 of 100 (Notable)
Logan	United States	Record daily precipitation	78.2 mm (3.1 in)	35 of 100 (Notable)
Chadron 3SW	United States	Record low minimum temperature	3.9 C (39.0 F)	35 of 100 (Notable)
El Campo	United States	Record high minimum temperature	27.2 C (81.0 F)	35 of 100 (Notable)
Matagorda #2	United States	Record high minimum temperature	27.8 C (82.0 F)	35 of 100 (Notable)
Minami Tori Shima Ma	Japan	Record daily precipitation	73.9 mm (2.9 in)	34 of 100 (Routine)
Las Palmas de Gran Canaria/Gan	Spain	Record high minimum temperature	26.2 C (79.2 F)	34 of 100 (Routine)
Palmdale	United States	Record high minimum temperature	25.0 C (77.0 F)	34 of 100 (Routine)

Counts by Type and Timescale

932 records

Records set or tied on 1 August 2009 by type: Highest daily maximum 248, Lowest daily maximum 106, Highest daily minimum 252, Lowest daily minimum 176, Heaviest daily rainfall 150.

Records on 1 August 2009 by type
Record type	Records
Highest daily maximum	248
Lowest daily maximum	106
Highest daily minimum	252
Lowest daily minimum	176
Heaviest daily rainfall	150
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 August 2009 by timescale: all-time 1, monthly 62, daily 869.

How Much Records Were Beaten By

608 broken records

Margins by which the 608 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 50.1. Ties are not counted.

Top 20 by Significance

1 August 2009

Top 20 records on 1 August 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 August 2009	Presa la Calera, MX	monthly low min	15.6 C (60.1 F)	4.4 C (7.9 F)	33 years	62 of 100 (Major)
1 August 2009	Superior, US	daily low min	8.9 C (48.0 F)	3.3 C (5.9 F)	100 years	49 of 100 (Notable)
1 August 2009	Flatonia 4SE, US	monthly high min	27.2 C (81.0 F)	0.5 C (0.9 F)	87 years	49 of 100 (Notable)
1 August 2009	Ellsworth, US	daily low min	6.7 C (44.1 F)	3.3 C (5.9 F)	100 years	48 of 100 (Notable)
1 August 2009	Rugby, US	daily low max	18.3 C (64.9 F)	3.9 C (7.0 F)	104 years	48 of 100 (Notable)
1 August 2009	Huntsville, US	daily low max	28.3 C (82.9 F)	2.3 C (4.1 F)	106 years	48 of 100 (Notable)
1 August 2009	Haines AP, US	daily high min	14.4 C (57.9 F)	2.2 C (4.0 F)	94 years	46 of 100 (Notable)
1 August 2009	Beeville 5 NE, US	daily high min	26.7 C (80.1 F)	1.1 C (2.0 F)	94 years	45 of 100 (Notable)
1 August 2009	Falfurrias, US	daily high min	27.2 C (81.0 F)	1.1 C (2.0 F)	94 years	45 of 100 (Notable)
1 August 2009	N Loup, US	daily low min	6.7 C (44.1 F)	1.6 C (2.9 F)	110 years	44 of 100 (Notable)
1 August 2009	Ferris, US	daily rain	78.5 mm (3.1 in)	50.1 mm (2.0 in)	14 years	44 of 100 (Notable)
1 August 2009	Cuddalore, IN	daily rain	70.1 mm (2.8 in)	17.0 mm (0.7 in)	80 years	43 of 100 (Notable)
1 August 2009	San Agustin Metziquititlan, MX	daily high max	35.0 C (95.0 F)	5.0 C (9.0 F)	55 years	43 of 100 (Notable)
1 August 2009	Rison, US	daily low max	25.6 C (78.1 F)	1.1 C (2.0 F)	113 years	43 of 100 (Notable)
1 August 2009	Norwich, US	daily low max	25.6 C (78.1 F)	1.1 C (2.0 F)	104 years	42 of 100 (Notable)
1 August 2009	New Ulm 2 SE, US	daily low max	21.1 C (70.0 F)	1.1 C (2.0 F)	106 years	42 of 100 (Notable)
1 August 2009	New Caney 2 E, US	daily rain	69.3 mm (2.7 in)	40.3 mm (1.6 in)	34 years	42 of 100 (Notable)
1 August 2009	Hardy, US	daily low max	27.2 C (81.0 F)	0.6 C (1.1 F)	110 years	41 of 100 (Notable)
1 August 2009	Norton Dam, US	daily rain	71.1 mm (2.8 in)	43.9 mm (1.7 in)	10 years	41 of 100 (Notable)
1 August 2009	Jordan, US	daily low min	3.9 C (39.0 F)	0.5 C (0.9 F)	103 years	41 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 2009

Records set or tied on this calendar date in each year from 1797 to 2009. 2009 had 932 records.

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

Records on 08-01 in each year
Year	Records
1797	1
1816	2
1829	1
1833	1
1834	2
1836	1
1838	1
1842	1
1851	1
1856	1
1858	3
1859	1
1861	1
1862	1
1863	1
1865	1
1868	1
1869	2
1873	1
1874	1
1875	3
1876	1
1878	1
1879	1
1881	3
1883	1
1886	2
1887	1
1890	1
1891	7
1892	4
1893	3
1894	1
1895	3
1896	4
1897	2
1898	3
1899	1
1900	1
1901	3
1902	5
1903	19
1904	10
1905	12
1906	18
1907	13
1908	18
1909	15
1910	30
1911	46
1912	49
1913	25
1914	17
1915	49
1916	16
1917	108
1918	55
1919	32
1920	101
1921	87
1922	44
1923	203
1924	93
1925	281
1926	252
1927	266
1928	132
1929	161
1930	252
1931	362
1932	408
1933	487
1934	448
1935	547
1936	636
1937	492
1938	523
1939	335
1940	333
1941	341
1942	388
1943	398
1944	410
1945	975
1946	336
1947	401
1948	354
1949	324
1950	552
1951	420
1952	391
1953	565
1954	462
1955	796
1956	441
1957	270
1958	389
1959	352
1960	677
1961	404
1962	602
1963	270
1964	883
1965	669
1966	383
1967	250
1968	625
1969	453
1970	482
1971	1,135
1972	609
1973	766
1974	526
1975	915
1976	886
1977	636
1978	706
1979	580
1980	906
1981	668
1982	742
1983	931
1984	532
1985	987
1986	846
1987	999
1988	880
1989	1,301
1990	927
1991	740
1992	1,024
1993	907
1994	1,217
1995	1,513
1996	1,118
1997	904
1998	1,281
1999	1,707
2000	1,020
2001	1,079
2002	1,249
2003	1,155
2004	740
2005	878
2006	1,655
2007	746
2008	795
2009	932
2010	1,182
2011	1,191
2012	850
2013	542
2014	853
2015	864
2016	499
2017	758
2018	987
2019	479
2020	838
2021	1,009
2022	915
2023	627
2024	879
2025	785
2026	1,085

Download the Data

Data for records on 2009-08-01: 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	556
10 to 20	37
20 to 30	7
30 to 40	3
40 to 50	4
50 to 60	1