Weather Records on 9 May 2011

1,104 weather records were set or tied worldwide on 9 May 2011. Highest significance: Alton, US.

Key Facts for 9 May 2011

On 9 May 2011, 1,104 weather records were set or tied at long-record stations worldwide.
581 were record highs and 174 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 22 monthly and 1,078 daily.
Alton set a daily record precipitation of 26.9 mm (1.1 in) on 9 May 2011.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 428 records.

Record Map

1,104 stations

1,104 station records on 9 May 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 May 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Alton	United States	Record daily precipitation	26.9 mm (1.1 in)	69 of 100 (Major)
Princeville Rch 1117	United States	Record daily precipitation	202.2 mm (8.0 in)	68 of 100 (Major)
Mogoca	Russia	Record daily precipitation	36.9 mm (1.5 in)	67 of 100 (Major)
Zion Np	United States	Record daily precipitation	29.0 mm (1.1 in)	61 of 100 (Major)
Lampang	Thailand	Record daily precipitation	189.7 mm (7.5 in)	60 of 100 (Major)
Nanango Wills St	Australia	Record daily precipitation	34.8 mm (1.4 in)	59 of 100 (Notable)
Bogarella	Australia	Record daily precipitation	25.0 mm (1.0 in)	59 of 100 (Notable)
Fish Springs Nwr	United States	Record daily precipitation	32.8 mm (1.3 in)	52 of 100 (Notable)
Kilauea 1134	United States	Record daily precipitation	143.5 mm (5.6 in)	52 of 100 (Notable)
Stanford	United States	Record daily precipitation	40.9 mm (1.6 in)	50 of 100 (Notable)
Kii-Kahuku 911	United States	Record daily precipitation	88.6 mm (3.5 in)	50 of 100 (Notable)
Togwotee Pass	United States	Record daily precipitation	35.6 mm (1.4 in)	50 of 100 (Notable)
Castle Rock	United States	Record high minimum temperature	13.3 C (55.9 F)	49 of 100 (Notable)
Koloko Rsvr 1137	United States	Record daily precipitation	123.2 mm (4.9 in)	49 of 100 (Notable)
Younts Peak	United States	Record daily precipitation	30.5 mm (1.2 in)	49 of 100 (Notable)
Cheesman	United States	Record high minimum temperature	11.7 C (53.1 F)	48 of 100 (Notable)
Estacada 2 SE	United States	Record daily precipitation	26.7 mm (1.1 in)	48 of 100 (Notable)
Callao	United States	Record daily precipitation	25.1 mm (1.0 in)	47 of 100 (Notable)
Columbus 3 NE	United States	Record high maximum temperature	36.7 C (98.1 F)	45 of 100 (Notable)
Garfield	United States	Record daily precipitation	36.6 mm (1.4 in)	44 of 100 (Notable)
Tyler Pounds Fld	United States	Record high maximum temperature	35.0 C (95.0 F)	44 of 100 (Notable)
Mantuan Downs	Australia	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
Gillespie	Australia	Record daily precipitation	26.0 mm (1.0 in)	43 of 100 (Notable)
Enid	United States	Record high maximum temperature	37.2 C (99.0 F)	43 of 100 (Notable)
Moose	United States	Record daily precipitation	35.8 mm (1.4 in)	43 of 100 (Notable)
Little Warm	United States	Record daily precipitation	45.7 mm (1.8 in)	43 of 100 (Notable)
Two Ocean Plateau	United States	Record daily precipitation	38.1 mm (1.5 in)	43 of 100 (Notable)
Lebanon 2W	United States	Record high maximum temperature	32.8 C (91.0 F)	42 of 100 (Notable)
Troutdale	United States	Record daily precipitation	32.5 mm (1.3 in)	42 of 100 (Notable)
Jackson	United States	Record low maximum temperature	3.9 C (39.0 F)	42 of 100 (Notable)
Murgon Post Office	Australia	Record daily precipitation	44.4 mm (1.7 in)	41 of 100 (Notable)
Karesuando	Sweden	Record high minimum temperature	4.6 C (40.3 F)	41 of 100 (Notable)
Eureka Springs 3 WNW	United States	Record high maximum temperature	32.2 C (90.0 F)	41 of 100 (Notable)
Genoa 2 W	United States	Record high maximum temperature	38.3 C (100.9 F)	41 of 100 (Notable)
Superior	United States	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Darwin Rch	United States	Record daily precipitation	49.8 mm (2.0 in)	41 of 100 (Notable)
Clarendon	United States	Record high minimum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Moura Post Office	Australia	Record daily precipitation	30.6 mm (1.2 in)	40 of 100 (Notable)
Roberts 1 W	United States	Record daily precipitation	37.3 mm (1.5 in)	40 of 100 (Notable)
Mason City	United States	Record high maximum temperature	32.2 C (90.0 F)	40 of 100 (Notable)
Hill City Muni AP	United States	Record high maximum temperature	36.1 C (97.0 F)	40 of 100 (Notable)
Paradise	United States	Record high minimum temperature	15.6 C (60.1 F)	39 of 100 (Notable)
Smith Ctr	United States	Record high maximum temperature	34.4 C (93.9 F)	39 of 100 (Notable)
Auburn 5 ESE	United States	Record high maximum temperature	37.2 C (99.0 F)	39 of 100 (Notable)
Purdum	United States	Record high minimum temperature	18.9 C (66.0 F)	39 of 100 (Notable)
Tioga 1E	United States	Record daily precipitation	28.4 mm (1.1 in)	39 of 100 (Notable)
Amberley AMO	Australia	Record low maximum temperature	18.3 C (64.9 F)	38 of 100 (Notable)
Archerfield Airport	Australia	Record low maximum temperature	17.8 C (64.0 F)	38 of 100 (Notable)
Cassville 1 NE	United States	Record high maximum temperature	31.1 C (88.0 F)	38 of 100 (Notable)
Taloga	United States	Record high maximum temperature	40.0 C (104.0 F)	38 of 100 (Notable)
Provo Byu	United States	Record low maximum temperature	7.2 C (45.0 F)	38 of 100 (Notable)
Maryborough	Australia	Record low maximum temperature	18.0 C (64.4 F)	37 of 100 (Notable)
Alamo Dam	United States	Record low minimum temperature	0.6 C (33.1 F)	37 of 100 (Notable)
Indio Fire STN	United States	Record low maximum temperature	22.8 C (73.0 F)	37 of 100 (Notable)
Chambers	United States	Record high minimum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Columbus 3 NE	United States	Record high minimum temperature	19.4 C (66.9 F)	37 of 100 (Notable)
Tooele	United States	Record daily precipitation	33.8 mm (1.3 in)	37 of 100 (Notable)
Kilauea 1134	United States	Record low maximum temperature	22.2 C (72.0 F)	37 of 100 (Notable)
Basin Creek	United States	Record daily precipitation	40.6 mm (1.6 in)	37 of 100 (Notable)
Falls City Brenner Fld	United States	Record high maximum temperature	36.1 C (97.0 F)	37 of 100 (Notable)

Counts by Type and Timescale

1,104 records

Records set or tied on 9 May 2011 by type: Highest daily maximum 331, Lowest daily maximum 140, Highest daily minimum 250, Lowest daily minimum 34, Heaviest daily rainfall 332, Heaviest daily snowfall 12, Deepest snow cover 5.

Records on 9 May 2011 by type
Record type	Records
Highest daily maximum	331
Lowest daily maximum	140
Highest daily minimum	250
Lowest daily minimum	34
Heaviest daily rainfall	332
Heaviest daily snowfall	12
Deepest snow cover	5

Records on 9 May 2011 by timescale: all-time 4, monthly 22, daily 1,078.

How Much Records Were Beaten By

887 broken records

Margins by which the 887 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 171.7. Ties are not counted.

Top 20 by Significance

9 May 2011

Top 20 records on 9 May 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 2011	Alton, US	daily rain	26.9 mm (1.1 in)	19.3 mm (0.8 in)	88 years	69 of 100 (Major)
9 May 2011	Princeville Rch 1117, US	daily rain	202.2 mm (8.0 in)	171.7 mm (6.8 in)	72 years	68 of 100 (Major)
9 May 2011	Mogoca, RU	daily rain	36.9 mm (1.5 in)	27.7 mm (1.1 in)	57 years	67 of 100 (Major)
9 May 2011	Zion Np, US	daily rain	29.0 mm (1.1 in)	15.0 mm (0.6 in)	88 years	61 of 100 (Major)
9 May 2011	Lampang, TH	daily rain	189.7 mm (7.5 in)	141.0 mm (5.6 in)	48 years	60 of 100 (Major)
9 May 2011	Nanango Wills St, AU	daily rain	34.8 mm (1.4 in)	18.8 mm (0.7 in)	108 years	59 of 100 (Notable)
9 May 2011	Bogarella, AU	daily rain	25.0 mm (1.0 in)	25.0 mm (1.0 in)	97 years	59 of 100 (Notable)
9 May 2011	Fish Springs Nwr, US	daily rain	32.8 mm (1.3 in)	23.9 mm (0.9 in)	28 years	52 of 100 (Notable)
9 May 2011	Kilauea 1134, US	daily rain	143.5 mm (5.6 in)	91.7 mm (3.6 in)	6 years	52 of 100 (Notable)
9 May 2011	Stanford, US	daily rain	40.9 mm (1.6 in)	30.2 mm (1.2 in)	28 years	50 of 100 (Notable)
9 May 2011	Kii-Kahuku 911, US	daily rain	88.6 mm (3.5 in)	85.6 mm (3.4 in)	24 years	50 of 100 (Notable)
9 May 2011	Togwotee Pass, US	daily rain	35.6 mm (1.4 in)	25.4 mm (1.0 in)	25 years	50 of 100 (Notable)
9 May 2011	Castle Rock, US	daily high min	13.3 C (55.9 F)	3.9 C (7.0 F)	100 years	49 of 100 (Notable)
9 May 2011	Koloko Rsvr 1137, US	daily rain	123.2 mm (4.9 in)	93.0 mm (3.7 in)	6 years	49 of 100 (Notable)
9 May 2011	Younts Peak, US	daily rain	30.5 mm (1.2 in)	20.3 mm (0.8 in)	28 years	49 of 100 (Notable)
9 May 2011	Cheesman, US	daily high min	11.7 C (53.1 F)	4.5 C (8.1 F)	88 years	48 of 100 (Notable)
9 May 2011	Estacada 2 SE, US	daily rain	26.7 mm (1.1 in)	7.1 mm (0.28 in)	94 years	48 of 100 (Notable)
9 May 2011	Callao, US	daily rain	25.1 mm (1.0 in)	17.0 mm (0.7 in)	8 years	47 of 100 (Notable)
9 May 2011	Columbus 3 NE, US	daily high max	36.7 C (98.1 F)	3.4 C (6.1 F)	115 years	45 of 100 (Notable)
9 May 2011	Garfield, US	daily rain	36.6 mm (1.4 in)	20.9 mm (0.8 in)	24 years	44 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 2011

Records set or tied on this calendar date in each year from 1793 to 2011. 2011 had 1,104 records.

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

Records on 05-09 in each year
Year	Records
1793	1
1795	1
1806	1
1810	1
1823	1
1834	1
1838	1
1843	1
1845	2
1846	1
1848	1
1850	2
1855	2
1857	1
1858	1
1861	1
1862	1
1864	2
1865	2
1867	2
1872	1
1873	2
1874	1
1875	2
1879	4
1880	3
1882	1
1883	2
1884	3
1885	3
1889	3
1890	3
1891	3
1892	1
1893	1
1895	2
1896	4
1897	3
1898	3
1899	2
1900	2
1901	9
1902	8
1903	9
1904	14
1905	34
1906	41
1907	11
1908	16
1909	34
1910	45
1911	23
1912	23
1913	15
1914	43
1915	27
1916	26
1917	50
1918	49
1919	47
1920	56
1921	102
1922	45
1923	461
1924	262
1925	123
1926	196
1927	343
1928	302
1929	166
1930	526
1931	411
1932	132
1933	482
1934	750
1935	111
1936	622
1937	128
1938	171
1939	345
1940	237
1941	335
1942	180
1943	524
1944	412
1945	538
1946	278
1947	1,145
1948	379
1949	417
1950	660
1951	188
1952	348
1953	507
1954	489
1955	288
1956	722
1957	505
1958	355
1959	252
1960	748
1961	516
1962	435
1963	1,103
1964	503
1965	730
1966	994
1967	681
1968	545
1969	653
1970	372
1971	338
1972	587
1973	386
1974	699
1975	465
1976	714
1977	931
1978	649
1979	1,605
1980	1,030
1981	639
1982	523
1983	872
1984	892
1985	829
1986	1,253
1987	1,481
1988	594
1989	1,347
1990	850
1991	759
1992	1,476
1993	967
1994	573
1995	960
1996	1,260
1997	1,088
1998	1,182
1999	970
2000	1,114
2001	969
2002	1,489
2003	1,802
2004	926
2005	851
2006	738
2007	765
2008	693
2009	816
2010	764
2011	1,104
2012	686
2013	684
2014	754
2015	689
2016	917
2017	539
2018	879
2019	1,043
2020	1,673
2021	501
2022	1,308
2023	474
2024	792
2025	622
2026	309

Download the Data

Data for records on 2011-05-09: 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 25	851
25 to 50	28
50 to 75	3
75 to 100	3
100 to 125	0
125 to 150	1
150 to 175	1