Weather Records on 9 May 2017

539 weather records were set or tied worldwide on 9 May 2017. Highest significance: Waipahu 750, US.

Key Facts for 9 May 2017

On 9 May 2017, 539 weather records were set or tied at long-record stations worldwide.
126 were record highs and 278 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 14 monthly and 524 daily.
Waipahu 750 set a daily record precipitation of 27.9 mm (1.1 in) on 9 May 2017.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 432 records.

Record Map

539 stations

539 station records on 9 May 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 May 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Waipahu 750	United States	Record daily precipitation	27.9 mm (1.1 in)	60 of 100 (Major)
Trinidad	United States	Record daily precipitation	33.0 mm (1.3 in)	53 of 100 (Notable)
Cimarron 4 SW	United States	Record daily precipitation	36.1 mm (1.4 in)	53 of 100 (Notable)
Gascon	United States	Record daily precipitation	49.8 mm (2.0 in)	51 of 100 (Notable)
Kaneohe 838.1	United States	Record daily precipitation	41.1 mm (1.6 in)	47 of 100 (Notable)
Las Vegas Muni AP	United States	Record daily precipitation	25.1 mm (1.0 in)	47 of 100 (Notable)
Novyj Tor'jal	Russia	Record daily precipitation	37.1 mm (1.5 in)	46 of 100 (Notable)
Greenfield	United States	Record daily precipitation	30.0 mm (1.2 in)	43 of 100 (Notable)
Whitestown	United States	Record daily precipitation	25.7 mm (1.0 in)	43 of 100 (Notable)
Talkeetna AP	United States	Record high minimum temperature	6.7 C (44.1 F)	42 of 100 (Notable)
Hoopeston	United States	Record daily precipitation	32.5 mm (1.3 in)	41 of 100 (Notable)
W Lafayette 6 NW	United States	Record daily precipitation	41.9 mm (1.6 in)	41 of 100 (Notable)
Mt Sterling	United States	Record low minimum temperature	-0.6 C (30.9 F)	41 of 100 (Notable)
Parnu	Estonia	Record low minimum temperature	-3.1 C (26.4 F)	40 of 100 (Notable)
Nogales 6 N	United States	Record low maximum temperature	15.6 C (60.1 F)	40 of 100 (Notable)
Sibley	United States	Record high maximum temperature	30.6 C (87.1 F)	40 of 100 (Notable)
Animas 3ESE	United States	Record low maximum temperature	19.4 C (66.9 F)	39 of 100 (Notable)
Tupper Lake Sunmount	United States	Record low maximum temperature	2.2 C (36.0 F)	39 of 100 (Notable)
Pleasant Valley	United States	Record low maximum temperature	11.7 C (53.1 F)	36 of 100 (Notable)
Kolob	United States	Record daily precipitation	40.6 mm (1.6 in)	36 of 100 (Notable)
Everett	United States	Record low minimum temperature	-4.4 C (24.1 F)	35 of 100 (Notable)
Lake Margaret Power Station	Australia	Record daily precipitation	58.0 mm (2.3 in)	34 of 100 (Routine)
Kiel-Holtenau	Germany	Record low minimum temperature	-0.9 C (30.4 F)	34 of 100 (Routine)
Pekoa Airport (Sant	Vanuatu	Record daily precipitation	59.9 mm (2.4 in)	34 of 100 (Routine)
Hoburg	Sweden	Record low minimum temperature	-1.3 C (29.7 F)	34 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record low minimum temperature	-5.0 C (23.0 F)	33 of 100 (Routine)
Soderarm	Sweden	Record low minimum temperature	-1.2 C (29.8 F)	33 of 100 (Routine)
Bramon	Sweden	Record low minimum temperature	-1.5 C (29.3 F)	33 of 100 (Routine)
La Junta Muni AP	United States	Record daily precipitation	34.0 mm (1.3 in)	33 of 100 (Routine)
Blythe ASOS	United States	Record low maximum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Cadiz	Spain	Record daily precipitation	28.2 mm (1.1 in)	32 of 100 (Routine)
Visby_Flygplats	Sweden	Record low maximum temperature	4.7 C (40.5 F)	32 of 100 (Routine)
Karlsborg_Mo	Sweden	Record low minimum temperature	-3.8 C (25.2 F)	32 of 100 (Routine)
Elk	United States	Record high minimum temperature	12.8 C (55.0 F)	32 of 100 (Routine)
Indian Lake 2SW	United States	Record low maximum temperature	3.3 C (37.9 F)	32 of 100 (Routine)
Lowville	United States	Record low maximum temperature	5.0 C (41.0 F)	32 of 100 (Routine)
Bargara	Australia	Record daily precipitation	36.6 mm (1.4 in)	31 of 100 (Routine)
Mombasa	Kenya	Record daily precipitation	235.0 mm (9.3 in)	31 of 100 (Routine)
Danville Rgnl AP	United States	Record low maximum temperature	14.4 C (57.9 F)	31 of 100 (Routine)
Erie Intl AP	United States	Record low minimum temperature	-0.5 C (31.1 F)	31 of 100 (Routine)
Tullinge A	Sweden	Record low maximum temperature	5.6 C (42.1 F)	30 of 100 (Routine)
Stockholm-Bromma	Sweden	Record low maximum temperature	5.5 C (41.9 F)	30 of 100 (Routine)
Brest	Belarus	Record low minimum temperature	2.1 C (35.8 F)	29 of 100 (Routine)
Oberviechtach	Germany	Record low maximum temperature	7.0 C (44.6 F)	29 of 100 (Routine)
Berlin-Buch	Germany	Record low minimum temperature	-0.1 C (31.8 F)	29 of 100 (Routine)
Uppsala_Flygplats	Sweden	Record low minimum temperature	-5.4 C (22.3 F)	29 of 100 (Routine)
Vilsandi	Estonia	Record low minimum temperature	0.1 C (32.2 F)	28 of 100 (Routine)
Koln-Stammheim	Germany	Record low minimum temperature	3.0 C (37.4 F)	28 of 100 (Routine)
Kalmar_Flygplats	Sweden	Record low minimum temperature	-2.6 C (27.3 F)	28 of 100 (Routine)
Olands Sodra Udde	Sweden	Record low minimum temperature	-0.9 C (30.4 F)	28 of 100 (Routine)
Ostergarnsholm_A	Sweden	Record low minimum temperature	-0.9 C (30.4 F)	28 of 100 (Routine)
Brighton 3 SE	United States	Record daily precipitation	44.7 mm (1.8 in)	28 of 100 (Routine)
Salmon Gums Res.STN.	Australia	Record high minimum temperature	15.5 C (59.9 F)	27 of 100 (Routine)
Dolisie	Congo (Brazzaville)	Record high maximum temperature	33.5 C (92.3 F)	27 of 100 (Routine)
Kihnu	Estonia	Record low minimum temperature	0.3 C (32.5 F)	27 of 100 (Routine)
Pojarkovo	Russia	Record high maximum temperature	30.4 C (86.7 F)	27 of 100 (Routine)
Sala	Sweden	Record low minimum temperature	-6.2 C (20.8 F)	27 of 100 (Routine)
Sasabe	United States	Record low maximum temperature	15.0 C (59.0 F)	27 of 100 (Routine)
New Castle 3 SW	United States	Record low minimum temperature	-2.2 C (28.0 F)	27 of 100 (Routine)
Oberlin	United States	Record daily precipitation	35.6 mm (1.4 in)	27 of 100 (Routine)

Counts by Type and Timescale

539 records

Records set or tied on 9 May 2017 by type: Highest daily maximum 52, Lowest daily maximum 147, Highest daily minimum 74, Lowest daily minimum 131, Heaviest daily rainfall 130, Heaviest daily snowfall 3, Deepest snow cover 2.

Records on 9 May 2017 by type
Record type	Records
Highest daily maximum	52
Lowest daily maximum	147
Highest daily minimum	74
Lowest daily minimum	131
Heaviest daily rainfall	130
Heaviest daily snowfall	3
Deepest snow cover	2

Records on 9 May 2017 by timescale: all-time 1, monthly 14, daily 524.

How Much Records Were Beaten By

451 broken records

Margins by which the 451 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 51.0. Ties are not counted.

Top 20 by Significance

9 May 2017

Top 20 records on 9 May 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 2017	Waipahu 750, US	daily rain	27.9 mm (1.1 in)	17.7 mm (0.7 in)	103 years	60 of 100 (Major)
9 May 2017	Trinidad, US	daily rain	33.0 mm (1.3 in)	19.0 mm (0.7 in)	74 years	53 of 100 (Notable)
9 May 2017	Cimarron 4 SW, US	daily rain	36.1 mm (1.4 in)	19.3 mm (0.8 in)	74 years	53 of 100 (Notable)
9 May 2017	Gascon, US	daily rain	49.8 mm (2.0 in)	33.5 mm (1.3 in)	20 years	51 of 100 (Notable)
9 May 2017	Kaneohe 838.1, US	daily rain	41.1 mm (1.6 in)	8.1 mm (0.32 in)	104 years	47 of 100 (Notable)
9 May 2017	Las Vegas Muni AP, US	daily rain	25.1 mm (1.0 in)	19.3 mm (0.8 in)	48 years	47 of 100 (Notable)
9 May 2017	Novyj Tor'jal, RU	monthly rain	37.1 mm (1.5 in)	7.1 mm (0.28 in)	51 years	46 of 100 (Notable)
9 May 2017	Greenfield, US	daily rain	30.0 mm (1.2 in)	4.3 mm (0.17 in)	108 years	43 of 100 (Notable)
9 May 2017	Whitestown, US	daily rain	25.7 mm (1.0 in)	3.6 mm (0.14 in)	108 years	43 of 100 (Notable)
9 May 2017	Talkeetna AP, US	daily high min	6.7 C (44.1 F)	1.1 C (2.0 F)	98 years	42 of 100 (Notable)
9 May 2017	Hoopeston, US	daily rain	32.5 mm (1.3 in)	9.4 mm (0.37 in)	82 years	41 of 100 (Notable)
9 May 2017	W Lafayette 6 NW, US	daily rain	41.9 mm (1.6 in)	12.7 mm (0.5 in)	72 years	41 of 100 (Notable)
9 May 2017	Mt Sterling, US	daily low min	-0.6 C (30.9 F)	0.6 C (1.1 F)	111 years	41 of 100 (Notable)
9 May 2017	Parnu, EE	daily low min	-3.1 C (26.4 F)	0.1 C (0.2 F)	108 years	40 of 100 (Notable)
9 May 2017	Nogales 6 N, US	daily low max	15.6 C (60.1 F)	6.6 C (11.9 F)	60 years	40 of 100 (Notable)
9 May 2017	Sibley, US	daily high max	30.6 C (87.1 F)	0.6 C (1.1 F)	120 years	40 of 100 (Notable)
9 May 2017	Animas 3ESE, US	daily low max	19.4 C (66.9 F)	1.2 C (2.2 F)	91 years	39 of 100 (Notable)
9 May 2017	Tupper Lake Sunmount, US	daily low max	2.2 C (36.0 F)	1.7 C (3.1 F)	91 years	39 of 100 (Notable)
9 May 2017	Pleasant Valley, US	daily low max	11.7 C (53.1 F)	6.6 C (11.9 F)	52 years	36 of 100 (Notable)
9 May 2017	Kolob, US	monthly rain	40.6 mm (1.6 in)	12.7 mm (0.5 in)	5 years	36 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 2017

Records set or tied on this calendar date in each year from 1793 to 2017. 2017 had 539 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 2017-05-09: 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 10	416
10 to 20	27
20 to 30	5
30 to 40	2
40 to 50	0
50 to 60	1