Weather Records on 9 May 1991

759 weather records were set or tied worldwide on 9 May 1991. Highest significance: Houma, US.

Key Facts for 9 May 1991

On 9 May 1991, 759 weather records were set or tied at long-record stations worldwide.
221 were record highs and 277 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 21 monthly and 737 daily.
Houma set a daily record precipitation of 200.9 mm (7.9 in) on 9 May 1991.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 430 records.

Record Map

759 stations

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

Weather records on 9 May 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Houma	United States	Record daily precipitation	200.9 mm (7.9 in)	78 of 100 (Major)
Ignacio Lopez Rayon	Mexico	Record low minimum temperature	15.6 C (60.1 F)	61 of 100 (Major)
Aberdeen Exp STN	United States	Record daily precipitation	30.5 mm (1.2 in)	55 of 100 (Notable)
Donaldsonville 4 SW	United States	Record daily precipitation	104.4 mm (4.1 in)	54 of 100 (Notable)
Franklin 3 NW	United States	Record daily precipitation	71.6 mm (2.8 in)	53 of 100 (Notable)
Cabeca da Anta	Brazil	Record daily precipitation	80.4 mm (3.2 in)	50 of 100 (Notable)
Boca	United States	Record daily snowfall	20.3 cm (8.0 in)	49 of 100 (Notable)
Lugansk	Ukraine	Record daily precipitation	25.7 mm (1.0 in)	48 of 100 (Notable)
Robertsdale	United States	Record daily precipitation	111.8 mm (4.4 in)	48 of 100 (Notable)
Certkovo	Russia	Record daily precipitation	29.7 mm (1.2 in)	46 of 100 (Notable)
Reserve	United States	Record daily precipitation	81.3 mm (3.2 in)	46 of 100 (Notable)
Covington 8 WNW	United States	Record daily precipitation	53.8 mm (2.1 in)	44 of 100 (Notable)
Greenville	United States	Record daily precipitation	78.7 mm (3.1 in)	42 of 100 (Notable)
Manildra (George St)	Australia	Record daily precipitation	30.4 mm (1.2 in)	41 of 100 (Notable)
Fairhope 2 NE	United States	Record daily precipitation	119.6 mm (4.7 in)	41 of 100 (Notable)
Dubois Exp STN	United States	Record daily precipitation	26.9 mm (1.1 in)	41 of 100 (Notable)
Ivanhoe (Mt Manara)	Australia	Record daily precipitation	34.8 mm (1.4 in)	40 of 100 (Notable)
Turgaj	Kazakhstan	Record high minimum temperature	16.2 C (61.2 F)	40 of 100 (Notable)
Natchitoches	United States	Record daily precipitation	52.8 mm (2.1 in)	40 of 100 (Notable)
Galveston	United States	Record daily precipitation	71.1 mm (2.8 in)	40 of 100 (Notable)
Hill Springs	Australia	Record daily precipitation	36.0 mm (1.4 in)	39 of 100 (Notable)
Trinidad	United States	Record high minimum temperature	18.9 C (66.0 F)	39 of 100 (Notable)
Ft Hall 1 NNE	United States	Record daily precipitation	33.5 mm (1.3 in)	39 of 100 (Notable)
Blackburn	South Africa	Record daily precipitation	71.0 mm (2.8 in)	38 of 100 (Notable)
Sulphur Springs	United States	Record low maximum temperature	20.0 C (68.0 F)	38 of 100 (Notable)
Seward AP	United States	Record daily precipitation	36.6 mm (1.4 in)	37 of 100 (Notable)
Alectown (Vanvilla)	Australia	Record daily precipitation	26.8 mm (1.1 in)	36 of 100 (Notable)
Piaxtla	Mexico	Record daily precipitation	39.9 mm (1.6 in)	36 of 100 (Notable)
Vladikavkaz	Russia	Record high minimum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Camperdown	South Africa	Record daily precipitation	32.5 mm (1.3 in)	36 of 100 (Notable)
Grand Coteau	United States	Record low maximum temperature	22.8 C (73.0 F)	36 of 100 (Notable)
Lake Yellowstone	United States	Record daily snowfall	7.6 cm (3.0 in)	36 of 100 (Notable)
New Orleans Audubon	United States	Record low maximum temperature	21.7 C (71.1 F)	36 of 100 (Notable)
Quitupan	Mexico	Record daily precipitation	29.0 mm (1.1 in)	35 of 100 (Notable)
Albacete Los Llanos	Spain	Record low minimum temperature	1.2 C (34.2 F)	35 of 100 (Notable)
Frisco City 3 SSW	United States	Record daily precipitation	102.9 mm (4.1 in)	35 of 100 (Notable)
Marshallville	United States	Record daily precipitation	102.6 mm (4.0 in)	35 of 100 (Notable)
Paradis 7 S	United States	Record daily precipitation	110.5 mm (4.4 in)	35 of 100 (Notable)
St-Girons	France	Record daily precipitation	36.8 mm (1.4 in)	33 of 100 (Routine)
Oberlin Fire Twr	United States	Record daily precipitation	146.1 mm (5.8 in)	33 of 100 (Routine)
Katon-Karagaj	Kazakhstan	Record daily precipitation	25.9 mm (1.0 in)	32 of 100 (Routine)
Valencia	Spain	Record low minimum temperature	6.0 C (42.8 F)	32 of 100 (Routine)
Truckee Rs	United States	Record daily snowfall	17.8 cm (7.0 in)	32 of 100 (Routine)
Jacksonville Beach	United States	Record high minimum temperature	28.3 C (82.9 F)	32 of 100 (Routine)
Bastrop	United States	Record low maximum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Ft Bidwell	United States	Record low maximum temperature	6.7 C (44.1 F)	31 of 100 (Routine)
Ruby Lake Nwr	United States	Record daily snowfall	5.6 cm (2.2 in)	31 of 100 (Routine)
Wagoner	United States	Record high minimum temperature	22.2 C (72.0 F)	31 of 100 (Routine)
Duchesne	United States	Record high minimum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Turgaj	Kazakhstan	Record high maximum temperature	35.5 C (95.9 F)	30 of 100 (Routine)
Atemajac de Brizuela	Mexico	Record daily precipitation	27.9 mm (1.1 in)	30 of 100 (Routine)
Kurgan	Russia	Record high minimum temperature	16.6 C (61.9 F)	30 of 100 (Routine)
Atmore	United States	Record daily precipitation	110.2 mm (4.3 in)	30 of 100 (Routine)
Kellogg	United States	Record low maximum temperature	7.8 C (46.0 F)	30 of 100 (Routine)
Livingston 12 S	United States	Record daily precipitation	32.5 mm (1.3 in)	30 of 100 (Routine)
Cornubia	South Africa	Record daily precipitation	69.5 mm (2.7 in)	29 of 100 (Routine)
Island Park	United States	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Cove 1 E	United States	Record low maximum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
Tillabery	Niger	Record high minimum temperature	33.0 C (91.4 F)	28 of 100 (Routine)
Krasnojarsk	Russia	Record high minimum temperature	15.4 C (59.7 F)	28 of 100 (Routine)

Counts by Type and Timescale

759 records

Records set or tied on 9 May 1991 by type: Highest daily maximum 63, Lowest daily maximum 141, Highest daily minimum 158, Lowest daily minimum 136, Heaviest daily rainfall 244, Heaviest daily snowfall 15, Deepest snow cover 2.

Records on 9 May 1991 by type
Record type	Records
Highest daily maximum	63
Lowest daily maximum	141
Highest daily minimum	158
Lowest daily minimum	136
Heaviest daily rainfall	244
Heaviest daily snowfall	15
Deepest snow cover	2

Records on 9 May 1991 by timescale: all-time 1, monthly 21, daily 737.

How Much Records Were Beaten By

620 broken records

Margins by which the 620 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 143.7. Ties are not counted.

Top 20 by Significance

9 May 1991

Top 20 records on 9 May 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 1991	Houma, US	daily rain	200.9 mm (7.9 in)	143.7 mm (5.7 in)	97 years	78 of 100 (Major)
9 May 1991	Ignacio Lopez Rayon, MX	monthly low min	15.6 C (60.1 F)	4.4 C (7.9 F)	28 years	61 of 100 (Major)
9 May 1991	Aberdeen Exp STN, US	daily rain	30.5 mm (1.2 in)	19.8 mm (0.8 in)	28 years	55 of 100 (Notable)
9 May 1991	Donaldsonville 4 SW, US	daily rain	104.4 mm (4.1 in)	56.6 mm (2.2 in)	72 years	54 of 100 (Notable)
9 May 1991	Franklin 3 NW, US	daily rain	71.6 mm (2.8 in)	44.9 mm (1.8 in)	84 years	53 of 100 (Notable)
9 May 1991	Cabeca da Anta, BR	daily rain	80.4 mm (3.2 in)	57.4 mm (2.3 in)	24 years	50 of 100 (Notable)
9 May 1991	Boca, US	monthly snowfall	20.3 cm (8.0 in)	2.5 cm (1.0 in)	83 years	49 of 100 (Notable)
9 May 1991	Lugansk, UA	daily rain	25.7 mm (1.0 in)	18.6 mm (0.7 in)	33 years	48 of 100 (Notable)
9 May 1991	Robertsdale, US	daily rain	111.8 mm (4.4 in)	53.9 mm (2.1 in)	52 years	48 of 100 (Notable)
9 May 1991	Certkovo, RU	daily rain	29.7 mm (1.2 in)	20.8 mm (0.8 in)	33 years	46 of 100 (Notable)
9 May 1991	Reserve, US	daily rain	81.3 mm (3.2 in)	25.4 mm (1.0 in)	84 years	46 of 100 (Notable)
9 May 1991	Covington 8 WNW, US	daily rain	53.8 mm (2.1 in)	13.2 mm (0.5 in)	97 years	44 of 100 (Notable)
9 May 1991	Greenville, US	daily rain	78.7 mm (3.1 in)	53.8 mm (2.1 in)	21 years	42 of 100 (Notable)
9 May 1991	Manildra (George St), AU	daily rain	30.4 mm (1.2 in)	13.1 mm (0.5 in)	60 years	41 of 100 (Notable)
9 May 1991	Fairhope 2 NE, US	daily rain	119.6 mm (4.7 in)	44.4 mm (1.7 in)	56 years	41 of 100 (Notable)
9 May 1991	Dubois Exp STN, US	daily rain	26.9 mm (1.1 in)	12.2 mm (0.5 in)	33 years	41 of 100 (Notable)
9 May 1991	Ivanhoe (Mt Manara), AU	daily rain	34.8 mm (1.4 in)	24.1 mm (0.9 in)	22 years	40 of 100 (Notable)
9 May 1991	Turgaj, KZ	daily high min	16.2 C (61.2 F)	2.3 C (4.1 F)	86 years	40 of 100 (Notable)
9 May 1991	Natchitoches, US	daily rain	52.8 mm (2.1 in)	7.1 mm (0.28 in)	97 years	40 of 100 (Notable)
9 May 1991	Galveston, US	daily rain	71.1 mm (2.8 in)	41.9 mm (1.6 in)	41 years	40 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 1991

Records set or tied on this calendar date in each year from 1793 to 1991. 1991 had 759 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 1991-05-09: 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 20	574
20 to 40	27
40 to 60	16
60 to 80	0
80 to 100	2
100 to 120	0
120 to 140	0
140 to 160	1