Weather Records on 17 July 2009

1,218 weather records were set or tied worldwide on 17 July 2009. Highest significance: Durham, GB.

Key Facts for 17 July 2009

On 17 July 2009, 1,218 weather records were set or tied at long-record stations worldwide.
498 were record highs and 504 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 31 monthly and 1,185 daily.
Durham set a daily record precipitation of 39.8 mm (1.6 in) on 17 July 2009.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 440 records.

Record Map

1,218 stations

1,218 station records on 17 July 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 July 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Durham	United Kingdom	Record daily precipitation	39.8 mm (1.6 in)	60 of 100 (Major)
Wudu	China	Record daily precipitation	54.2 mm (2.1 in)	59 of 100 (Notable)
Tuttlingen	Germany	Record daily precipitation	40.9 mm (1.6 in)	56 of 100 (Notable)
Pokegama Dam	United States	Record low maximum temperature	13.9 C (57.0 F)	56 of 100 (Notable)
Imperial Muni AP	United States	Record daily precipitation	56.6 mm (2.2 in)	56 of 100 (Notable)
Jalacingo	Mexico	Record high minimum temperature	21.7 C (71.1 F)	55 of 100 (Notable)
Warroad	United States	Record low maximum temperature	13.3 C (55.9 F)	52 of 100 (Notable)
Tosteberga	Sweden	Record daily precipitation	46.3 mm (1.8 in)	51 of 100 (Notable)
Newton Rigg	United Kingdom	Record daily precipitation	36.2 mm (1.4 in)	51 of 100 (Notable)
Leech Lake	United States	Record low maximum temperature	15.0 C (59.0 F)	51 of 100 (Notable)
Uberlingen/Bodensee	Germany	Record daily precipitation	63.5 mm (2.5 in)	50 of 100 (Notable)
Walnut	United States	Record low maximum temperature	20.0 C (68.0 F)	50 of 100 (Notable)
Hayward Rs	United States	Record low maximum temperature	17.2 C (63.0 F)	50 of 100 (Notable)
Wutoschingen-Ofteringen	Germany	Record daily precipitation	49.8 mm (2.0 in)	49 of 100 (Notable)
Kristianstad	Sweden	Record daily precipitation	50.5 mm (2.0 in)	49 of 100 (Notable)
Dunbar	United Kingdom	Record daily precipitation	34.4 mm (1.4 in)	49 of 100 (Notable)
Primghar	United States	Record low minimum temperature	8.9 C (48.0 F)	49 of 100 (Notable)
Ellwangen-Rindelbach	Germany	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Grunow	Germany	Record daily precipitation	51.6 mm (2.0 in)	48 of 100 (Notable)
Noumea Nf	New Caledonia [France]	Record daily precipitation	59.9 mm (2.4 in)	48 of 100 (Notable)
Torrevieja	Spain	Record high maximum temperature	36.0 C (96.8 F)	48 of 100 (Notable)
New Ulm 2 SE	United States	Record low maximum temperature	17.8 C (64.0 F)	48 of 100 (Notable)
Elkins- Randolph Co AP	United States	Record daily precipitation	43.9 mm (1.7 in)	48 of 100 (Notable)
San Diego de Alejandria	Mexico	Record high minimum temperature	21.7 C (71.1 F)	47 of 100 (Notable)
Leuchars	United Kingdom	Record daily precipitation	30.8 mm (1.2 in)	47 of 100 (Notable)
Koran	United States	Record daily precipitation	78.7 mm (3.1 in)	47 of 100 (Notable)
Flandreau	United States	Record low maximum temperature	18.9 C (66.0 F)	47 of 100 (Notable)
Mt Ayr	United States	Record low minimum temperature	9.4 C (48.9 F)	46 of 100 (Notable)
Hutchinson 1 N	United States	Record low maximum temperature	19.4 C (66.9 F)	46 of 100 (Notable)
Seward	United States	Record low minimum temperature	10.6 C (51.1 F)	46 of 100 (Notable)
1 ENE Fairfield	United States	Record low maximum temperature	23.3 C (73.9 F)	45 of 100 (Notable)
Whitestown	United States	Record low maximum temperature	23.3 C (73.9 F)	45 of 100 (Notable)
Brookings 2 NE	United States	Record low maximum temperature	18.9 C (66.0 F)	45 of 100 (Notable)
Aberporth	United Kingdom	Record daily precipitation	48.5 mm (1.9 in)	44 of 100 (Notable)
Laporte	United States	Record low maximum temperature	20.6 C (69.1 F)	44 of 100 (Notable)
Angelica	United States	Record low maximum temperature	17.8 C (64.0 F)	44 of 100 (Notable)
Stephan 2 NW	United States	Record low minimum temperature	5.6 C (42.1 F)	44 of 100 (Notable)
Champaign 3S	United States	Record low maximum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Butte	United States	Record low maximum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Castlewood	United States	Record low maximum temperature	18.9 C (66.0 F)	43 of 100 (Notable)
Hancock Exp Farm	United States	Record low maximum temperature	16.1 C (61.0 F)	43 of 100 (Notable)
Williston Sloulin Fld	United States	Record low minimum temperature	5.6 C (42.1 F)	43 of 100 (Notable)
Geisingen	Germany	Record daily precipitation	42.3 mm (1.7 in)	42 of 100 (Notable)
Las Animas	Mexico	Record high maximum temperature	35.0 C (95.0 F)	42 of 100 (Notable)
Zuerich/Fluntern	Switzerland	Record daily precipitation	52.9 mm (2.1 in)	42 of 100 (Notable)
Indio Fire STN	United States	Record high minimum temperature	34.4 C (93.9 F)	42 of 100 (Notable)
Carroll	United States	Record low maximum temperature	22.8 C (73.0 F)	42 of 100 (Notable)
Onawa 3NW	United States	Record low minimum temperature	9.4 C (48.9 F)	42 of 100 (Notable)
Montevideo 1SW	United States	Record low maximum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Red Lake Falls	United States	Record low maximum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Oregon	United States	Record low minimum temperature	11.7 C (53.1 F)	42 of 100 (Notable)
Madison	United States	Record low minimum temperature	9.4 C (48.9 F)	42 of 100 (Notable)
Rest Lake	United States	Record low maximum temperature	15.0 C (59.0 F)	42 of 100 (Notable)
Intl Falls Intl AP	United States	Record low maximum temperature	15.0 C (59.0 F)	42 of 100 (Notable)
Skwentna	United States	Record daily precipitation	36.8 mm (1.4 in)	42 of 100 (Notable)
Renningen-Ihinger Hof	Germany	Record daily precipitation	30.9 mm (1.2 in)	41 of 100 (Notable)
Britt 3E	United States	Record low maximum temperature	21.7 C (71.1 F)	41 of 100 (Notable)
Sheldon	United States	Record low minimum temperature	8.9 C (48.0 F)	41 of 100 (Notable)
Baudette	United States	Record low maximum temperature	17.2 C (63.0 F)	41 of 100 (Notable)
Fairmont	United States	Record low maximum temperature	21.7 C (71.1 F)	41 of 100 (Notable)

Counts by Type and Timescale

1,218 records

Records set or tied on 17 July 2009 by type: Highest daily maximum 244, Lowest daily maximum 313, Highest daily minimum 254, Lowest daily minimum 191, Heaviest daily rainfall 216.

Records on 17 July 2009 by type
Record type	Records
Highest daily maximum	244
Lowest daily maximum	313
Highest daily minimum	254
Lowest daily minimum	191
Heaviest daily rainfall	216
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 2009 by timescale: all-time 2, monthly 31, daily 1,185.

How Much Records Were Beaten By

870 broken records

Margins by which the 870 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 52.8. Ties are not counted.

Top 20 by Significance

17 July 2009

Top 20 records on 17 July 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 2009	Durham, GB	daily rain	39.8 mm (1.6 in)	12.5 mm (0.5 in)	120 years	60 of 100 (Major)
17 July 2009	Wudu, CN	daily rain	54.2 mm (2.1 in)	35.2 mm (1.4 in)	56 years	59 of 100 (Notable)
17 July 2009	Tuttlingen, DE	daily rain	40.9 mm (1.6 in)	15.2 mm (0.6 in)	91 years	56 of 100 (Notable)
17 July 2009	Pokegama Dam, US	daily low max	13.9 C (57.0 F)	6.7 C (12.1 F)	95 years	56 of 100 (Notable)
17 July 2009	Imperial Muni AP, US	daily rain	56.6 mm (2.2 in)	40.6 mm (1.6 in)	44 years	56 of 100 (Notable)
17 July 2009	Jalacingo, MX	daily high min	21.7 C (71.1 F)	8.9 C (16.0 F)	27 years	55 of 100 (Notable)
17 July 2009	Warroad, US	daily low max	13.3 C (55.9 F)	5.6 C (10.1 F)	94 years	52 of 100 (Notable)
17 July 2009	Tosteberga, SE	daily rain	46.3 mm (1.8 in)	25.3 mm (1.0 in)	52 years	51 of 100 (Notable)
17 July 2009	Newton Rigg, GB	daily rain	36.2 mm (1.4 in)	10.5 mm (0.4 in)	83 years	51 of 100 (Notable)
17 July 2009	Leech Lake, US	daily low max	15.0 C (59.0 F)	5.6 C (10.1 F)	87 years	51 of 100 (Notable)
17 July 2009	Uberlingen/Bodensee, DE	daily rain	63.5 mm (2.5 in)	29.1 mm (1.1 in)	43 years	50 of 100 (Notable)
17 July 2009	Walnut, US	daily low max	20.0 C (68.0 F)	3.9 C (7.0 F)	108 years	50 of 100 (Notable)
17 July 2009	Hayward Rs, US	daily low max	17.2 C (63.0 F)	4.5 C (8.1 F)	99 years	50 of 100 (Notable)
17 July 2009	Wutoschingen-Ofteringen, DE	daily rain	49.8 mm (2.0 in)	27.8 mm (1.1 in)	43 years	49 of 100 (Notable)
17 July 2009	Kristianstad, SE	daily rain	50.5 mm (2.0 in)	13.6 mm (0.5 in)	70 years	49 of 100 (Notable)
17 July 2009	Dunbar, GB	daily rain	34.4 mm (1.4 in)	21.1 mm (0.8 in)	22 years	49 of 100 (Notable)
17 July 2009	Primghar, US	daily low min	8.9 C (48.0 F)	3.3 C (5.9 F)	112 years	49 of 100 (Notable)
17 July 2009	Ellwangen-Rindelbach, DE	daily rain	33.0 mm (1.3 in)	14.1 mm (0.6 in)	67 years	48 of 100 (Notable)
17 July 2009	Grunow, DE	daily rain	51.6 mm (2.0 in)	37.9 mm (1.5 in)	16 years	48 of 100 (Notable)
17 July 2009	Noumea Nf, NC	daily rain	59.9 mm (2.4 in)	38.8 mm (1.5 in)	19 years	48 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

1793 to 2009

Records set or tied on this calendar date in each year from 1793 to 2009. 2009 had 1,218 records.

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

Records on 07-17 in each year
Year	Records
1793	1
1798	1
1799	1
1801	2
1802	1
1821	1
1827	1
1833	1
1840	1
1842	1
1845	2
1852	1
1862	1
1863	1
1865	2
1866	1
1871	1
1874	1
1875	2
1877	1
1880	1
1881	2
1882	2
1883	5
1884	1
1887	1
1888	2
1889	4
1890	4
1892	5
1893	3
1894	4
1895	1
1896	3
1897	1
1898	2
1899	4
1900	4
1901	6
1902	6
1903	13
1904	4
1905	9
1906	13
1907	12
1908	32
1909	16
1910	8
1911	52
1912	13
1913	26
1914	67
1915	71
1916	27
1917	62
1918	41
1919	45
1920	50
1921	120
1922	206
1923	105
1924	165
1925	275
1926	251
1927	118
1928	116
1929	154
1930	366
1931	492
1932	293
1933	216
1934	438
1935	245
1936	815
1937	313
1938	303
1939	540
1940	319
1941	386
1942	522
1943	321
1944	236
1945	681
1946	523
1947	505
1948	278
1949	405
1950	645
1951	356
1952	772
1953	557
1954	517
1955	512
1956	608
1957	298
1958	693
1959	631
1960	324
1961	408
1962	421
1963	223
1964	481
1965	753
1966	454
1967	965
1968	707
1969	741
1970	486
1971	790
1972	634
1973	680
1974	691
1975	775
1976	1,041
1977	764
1978	794
1979	642
1980	1,137
1981	628
1982	850
1983	1,120
1984	875
1985	483
1986	1,214
1987	1,388
1988	1,239
1989	1,289
1990	953
1991	763
1992	1,055
1993	956
1994	631
1995	917
1996	911
1997	816
1998	1,031
1999	925
2000	1,166
2001	916
2002	995
2003	1,396
2004	908
2005	1,184
2006	1,509
2007	1,218
2008	508
2009	1,218
2010	965
2011	1,101
2012	934
2013	819
2014	1,456
2015	831
2016	679
2017	398
2018	750
2019	477
2020	515
2021	625
2022	791
2023	1,060
2024	814
2025	966
2026	860

Download the Data

Data for records on 2009-07-17: 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	784
10 to 20	56
20 to 30	20
30 to 40	7
40 to 50	2
50 to 60	1