Weather Records on 9 May 1917

50 weather records were set or tied worldwide on 9 May 1917. Highest significance: Paris, CA.

Key Facts for 9 May 1917

On 9 May 1917, 50 weather records were set or tied at long-record stations worldwide.
1 were record highs and 37 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 49 daily.
Paris set a daily record precipitation of 33.0 mm (1.3 in) on 9 May 1917.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 435 records.

Record Map

50 stations

50 station records on 9 May 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 May 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Paris	Canada	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Houston Wb City	United States	Record low maximum temperature	19.4 C (66.9 F)	25 of 100 (Routine)
Gunnedah Pool	Australia	Record low maximum temperature	12.2 C (54.0 F)	22 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record daily precipitation	7.4 mm (0.29 in)	20 of 100 (Routine)
Herberton White St	Australia	Record daily precipitation	13.7 mm (0.5 in)	20 of 100 (Routine)
Bird Rocks	Canada	Record daily snowfall	2.8 cm (1.1 in)	20 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	4.4 C (39.9 F)	20 of 100 (Routine)
Jacksonville Wb City	United States	Record low minimum temperature	9.4 C (48.9 F)	20 of 100 (Routine)
Halifax	Canada	Record low maximum temperature	4.4 C (39.9 F)	18 of 100 (Routine)
Sandvig	Denmark	Record low minimum temperature	1.1 C (34.0 F)	18 of 100 (Routine)
Greenville Dwtn AP	United States	Record low minimum temperature	1.7 C (35.1 F)	18 of 100 (Routine)
Willunga	Australia	Record daily precipitation	10.7 mm (0.4 in)	17 of 100 (Routine)
Yarmouth	Canada	Record daily snowfall	6.6 cm (2.6 in)	16 of 100 (Routine)
Cape May 2 NW	United States	Record low minimum temperature	3.3 C (37.9 F)	16 of 100 (Routine)
Atlantic City Marina	United States	Record low minimum temperature	3.3 C (37.9 F)	16 of 100 (Routine)
Welland	Canada	Record low minimum temperature	0.0 C (32.0 F)	15 of 100 (Routine)
Skara 1	Sweden	Record low minimum temperature	-3.5 C (25.7 F)	15 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	1.7 C (35.1 F)	15 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record low minimum temperature	-1.4 C (29.5 F)	14 of 100 (Routine)
Setauket Strong	United States	Record low minimum temperature	4.4 C (39.9 F)	14 of 100 (Routine)
Greenville Dwtn AP	United States	Record low maximum temperature	14.4 C (57.9 F)	14 of 100 (Routine)
Salekhard	Russia	Record daily precipitation	6.3 mm (0.25 in)	13 of 100 (Routine)
Kristianstad	Sweden	Record low minimum temperature	0.0 C (32.0 F)	13 of 100 (Routine)
Chattanooga Wb City	United States	Record low minimum temperature	5.6 C (42.1 F)	13 of 100 (Routine)
Montgomery Wb City	United States	Record low minimum temperature	7.2 C (45.0 F)	12 of 100 (Routine)
Meadows	Australia	Record daily precipitation	8.9 mm (0.35 in)	11 of 100 (Routine)
Vastervik	Sweden	Record low minimum temperature	-2.0 C (28.4 F)	11 of 100 (Routine)
Jokkmokk	Sweden	Record low minimum temperature	-10.3 C (13.5 F)	11 of 100 (Routine)
Kiandra Chalet	Australia	Record daily precipitation	20.3 mm (0.8 in)	9 of 100 (Routine)
Vestervig	Denmark	Record low minimum temperature	0.7 C (33.3 F)	9 of 100 (Routine)
Umea	Sweden	Record low maximum temperature	0.6 C (33.1 F)	9 of 100 (Routine)
State College	United States	Record low maximum temperature	8.3 C (46.9 F)	9 of 100 (Routine)
Adelaide (Salisbury Bowling Cl	Australia	Record daily precipitation	5.1 mm (0.20 in)	8 of 100 (Routine)
Lakefield	Canada	Record low minimum temperature	0.0 C (32.0 F)	8 of 100 (Routine)
St. Petersburg	Russia	Record low maximum temperature	3.6 C (38.5 F)	8 of 100 (Routine)
Jonkoping	Sweden	Record low minimum temperature	-1.5 C (29.3 F)	8 of 100 (Routine)
Orebro	Sweden	Record low maximum temperature	6.5 C (43.7 F)	8 of 100 (Routine)
Buffalo	United States	Record low maximum temperature	5.0 C (41.0 F)	8 of 100 (Routine)
Virginia Sheedy Road	Australia	Record daily precipitation	5.1 mm (0.20 in)	6 of 100 (Routine)
Sable Island East End	Canada	Record daily precipitation	25.4 mm (1.0 in)	6 of 100 (Routine)
Visby_Flygplats	Sweden	Record low maximum temperature	5.5 C (41.9 F)	6 of 100 (Routine)
Bjuraker	Sweden	Record low maximum temperature	4.5 C (40.1 F)	6 of 100 (Routine)
London South	Canada	Record low maximum temperature	6.7 C (44.1 F)	3 of 100 (Routine)
Buffalo	United States	Record low minimum temperature	1.1 C (34.0 F)	3 of 100 (Routine)
Edmonton	Canada	Record high minimum temperature	7.2 C (45.0 F)	2 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	1.7 C (35.1 F)	2 of 100 (Routine)
Vineland	United States	Record low minimum temperature	3.3 C (37.9 F)	2 of 100 (Routine)
Wilmington Wb City	United States	Record low minimum temperature	6.7 C (44.1 F)	2 of 100 (Routine)
Jonkoping	Sweden	Record low maximum temperature	5.0 C (41.0 F)	1 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record low maximum temperature	3.0 C (37.4 F)	0 of 100 (Routine)

Counts by Type and Timescale

50 records

Records set or tied on 9 May 1917 by type: Lowest daily maximum 15, Highest daily minimum 1, Lowest daily minimum 22, Heaviest daily rainfall 10, Heaviest daily snowfall 2.

Records on 9 May 1917 by type
Record type	Records
Highest daily maximum	0
Lowest daily maximum	15
Highest daily minimum	1
Lowest daily minimum	22
Heaviest daily rainfall	10
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 9 May 1917 by timescale: all-time 0, monthly 1, daily 49.

How Much Records Were Beaten By

42 broken records

Margins by which the 42 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 28.0. Ties are not counted.

Top 20 by Significance

9 May 1917

Top 20 records on 9 May 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 1917	Paris, CA	daily rain	33.0 mm (1.3 in)	21.3 mm (0.8 in)	16 years	30 of 100 (Routine)
9 May 1917	Houston Wb City, US	daily low max	19.4 C (66.9 F)	3.9 C (7.0 F)	31 years	25 of 100 (Routine)
9 May 1917	Gunnedah Pool, AU	daily low max	12.2 C (54.0 F)	2.9 C (5.2 F)	37 years	22 of 100 (Routine)
9 May 1917	Ilulissat (Jakobshavn), GL	daily rain	7.4 mm (0.29 in)	4.4 mm (0.17 in)	37 years	20 of 100 (Routine)
9 May 1917	Herberton White St, AU	daily rain	13.7 mm (0.5 in)	8.4 mm (0.33 in)	21 years	20 of 100 (Routine)
9 May 1917	Bird Rocks, CA	daily snowfall	2.8 cm (1.1 in)	2.8 cm (1.1 in)	35 years	20 of 100 (Routine)
9 May 1917	Yarmouth, CA	daily low max	4.4 C (39.9 F)	2.8 C (5.0 F)	28 years	20 of 100 (Routine)
9 May 1917	Jacksonville Wb City, US	daily low min	9.4 C (48.9 F)	2.3 C (4.1 F)	26 years	20 of 100 (Routine)
9 May 1917	Halifax, CA	daily low max	4.4 C (39.9 F)	2.3 C (4.1 F)	35 years	18 of 100 (Routine)
9 May 1917	Sandvig, DK	daily low min	1.1 C (34.0 F)	0.5 C (0.9 F)	40 years	18 of 100 (Routine)
9 May 1917	Greenville Dwtn AP, US	daily low min	1.7 C (35.1 F)	2.7 C (4.9 F)	26 years	18 of 100 (Routine)
9 May 1917	Willunga, AU	daily rain	10.7 mm (0.4 in)	2.6 mm (0.10 in)	30 years	17 of 100 (Routine)
9 May 1917	Yarmouth, CA	monthly snowfall	6.6 cm (2.6 in)	1.3 cm (0.5 in)	0 years	16 of 100 (Routine)
9 May 1917	Cape May 2 NW, US	daily low min	3.3 C (37.9 F)	2.3 C (4.1 F)	18 years	16 of 100 (Routine)
9 May 1917	Atlantic City Marina, US	daily low min	3.3 C (37.9 F)	2.3 C (4.1 F)	18 years	16 of 100 (Routine)
9 May 1917	Welland, CA	daily low min	0.0 C (32.0 F)	1.1 C (2.0 F)	31 years	15 of 100 (Routine)
9 May 1917	Skara 1, SE	daily low min	-3.5 C (25.7 F)	1.0 C (1.8 F)	34 years	15 of 100 (Routine)
9 May 1917	Blue Hill Coop, US	daily low min	1.7 C (35.1 F)	1.1 C (2.0 F)	31 years	15 of 100 (Routine)
9 May 1917	Linkoeping-Malmslaett, SE	daily low min	-1.4 C (29.5 F)	0.4 C (0.7 F)	34 years	14 of 100 (Routine)
9 May 1917	Setauket Strong, US	daily low min	4.4 C (39.9 F)	1.2 C (2.2 F)	26 years	14 of 100 (Routine)

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 1917

Records set or tied on this calendar date in each year from 1793 to 1917. 1917 had 50 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 1917-05-09: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 5	38
5 to 10	1
10 to 15	1
15 to 20	0
20 to 25	1
25 to 30	1