Weather Records on 18 May 2017

1,855 weather records were set or tied worldwide on 18 May 2017. Highest significance: Hayden, US.

Key Facts for 18 May 2017

On 18 May 2017, 1,855 weather records were set or tied at long-record stations worldwide.
843 were record highs and 487 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 73 monthly and 1,779 daily.
Hayden set a daily record snowfall of 15.2 cm (6.0 in) on 18 May 2017.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 434 records.

Record Map

1,855 stations

1,855 station records on 18 May 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hayden	United States	Record daily snowfall	15.2 cm (6.0 in)	80 of 100 (Exceptional)
Minocqua	United States	Record daily precipitation	73.7 mm (2.9 in)	73 of 100 (Major)
Mystic Lake	United States	Record daily snowfall	91.4 cm (36.0 in)	71 of 100 (Major)
Mystic Lake	United States	Record daily precipitation	74.9 mm (2.9 in)	70 of 100 (Major)
Gilberton	Australia	Record daily precipitation	63.0 mm (2.5 in)	69 of 100 (Major)
Mellen 4 NE	United States	Record daily precipitation	62.7 mm (2.5 in)	68 of 100 (Major)
Phillips	United States	Record daily snowfall	38.1 cm (15.0 in)	67 of 100 (Major)
Spring Creek Station	Australia	Record daily precipitation	87.2 mm (3.4 in)	66 of 100 (Major)
Climax	United States	Record daily snowfall	38.1 cm (15.0 in)	66 of 100 (Major)
Wausaukee	United States	Record daily precipitation	56.4 mm (2.2 in)	66 of 100 (Major)
Ravenswood Post Office	Australia	Record daily precipitation	68.0 mm (2.7 in)	65 of 100 (Major)
Ft Collins	United States	Record daily precipitation	70.4 mm (2.8 in)	64 of 100 (Major)
Meeker	United States	Record daily snowfall	12.2 cm (4.8 in)	64 of 100 (Major)
Hebgen Dam	United States	Record daily snowfall	17.8 cm (7.0 in)	64 of 100 (Major)
Cheyenne	United States	Record daily snowfall	27.9 cm (11.0 in)	64 of 100 (Major)
Bahraich	India	Record daily precipitation	43.9 mm (1.7 in)	63 of 100 (Major)
Breckenridge	United States	Record daily snowfall	40.1 cm (15.8 in)	63 of 100 (Major)
Lamar Rs	United States	Record daily snowfall	12.7 cm (5.0 in)	63 of 100 (Major)
Boulder	United States	Record daily precipitation	79.0 mm (3.1 in)	62 of 100 (Major)
Winter	United States	Record daily precipitation	61.0 mm (2.4 in)	62 of 100 (Major)
Loei	Thailand	Record daily precipitation	103.9 mm (4.1 in)	61 of 100 (Major)
Robin Hood Station	Australia	Record daily precipitation	48.0 mm (1.9 in)	60 of 100 (Major)
Poplar Bluff	United States	Record daily precipitation	139.7 mm (5.5 in)	60 of 100 (Major)
Coal Creek Canyon	United States	Record daily snowfall	75.9 cm (29.9 in)	59 of 100 (Notable)
Alberta Ford For Ctr	United States	Record daily precipitation	46.7 mm (1.8 in)	59 of 100 (Notable)
Dawson	United States	Record daily precipitation	62.2 mm (2.4 in)	59 of 100 (Notable)
Tower Falls	United States	Record daily snowfall	12.7 cm (5.0 in)	59 of 100 (Notable)
Boulder	United States	Record snow depth	12.7 cm (5.0 in)	58 of 100 (Notable)
Nye #2	United States	Record daily snowfall	20.3 cm (8.0 in)	57 of 100 (Notable)
Nye #2	United States	Record snow depth	20.3 cm (8.0 in)	57 of 100 (Notable)
Boulder	United States	Record daily snowfall	13.5 cm (5.3 in)	56 of 100 (Notable)
Ft Collins	United States	Record daily snowfall	14.7 cm (5.8 in)	56 of 100 (Notable)
Hankensbuttel	Germany	Record daily precipitation	41.0 mm (1.6 in)	55 of 100 (Notable)
Willow Rsvr	United States	Record daily precipitation	56.9 mm (2.2 in)	55 of 100 (Notable)
Wheatland 4N	United States	Record daily snowfall	12.7 cm (5.0 in)	55 of 100 (Notable)
Breckenridge	United States	Record daily precipitation	30.0 mm (1.2 in)	54 of 100 (Notable)
Gunnison 3SW	United States	Record daily snowfall	5.1 cm (2.0 in)	54 of 100 (Notable)
Ladysmith 3W	United States	Record daily precipitation	61.0 mm (2.4 in)	54 of 100 (Notable)
Cochetopa Creek	United States	Record daily snowfall	5.1 cm (2.0 in)	53 of 100 (Notable)
Grand Lake 1 NW	United States	Record daily snowfall	22.9 cm (9.0 in)	53 of 100 (Notable)
Iron Mtn-Kingsford Wwtp	United States	Record daily precipitation	49.8 mm (2.0 in)	53 of 100 (Notable)
Croydon Township	Australia	Record daily precipitation	32.0 mm (1.3 in)	52 of 100 (Notable)
Dillon 1 E	United States	Record daily snowfall	33.0 cm (13.0 in)	52 of 100 (Notable)
Kassler	United States	Record daily snowfall	6.4 cm (2.5 in)	52 of 100 (Notable)
Elliston	United States	Record daily snowfall	16.5 cm (6.5 in)	52 of 100 (Notable)
Mystic Lake	United States	Record snow depth	50.8 cm (20.0 in)	52 of 100 (Notable)
Thermopolis	United States	Record daily precipitation	25.9 mm (1.0 in)	52 of 100 (Notable)
Burdekin Shire Council	Australia	Record daily precipitation	44.6 mm (1.8 in)	51 of 100 (Notable)
Collinsville Post Office	Australia	Record daily precipitation	56.8 mm (2.2 in)	51 of 100 (Notable)
Mount Wilkin	Australia	Record daily precipitation	28.0 mm (1.1 in)	51 of 100 (Notable)
Williams Fk Dam	United States	Record snow depth	15.2 cm (6.0 in)	51 of 100 (Notable)
Hecla 1E	United States	Record daily snowfall	32.0 cm (12.6 in)	51 of 100 (Notable)
Townsville Aero	Australia	Record daily precipitation	39.8 mm (1.6 in)	50 of 100 (Notable)
Aspea	Sweden	Record daily precipitation	29.2 mm (1.1 in)	50 of 100 (Notable)
Park Falls Dnr HQ	United States	Record daily precipitation	52.6 mm (2.1 in)	50 of 100 (Notable)
Lethebrook	Australia	Record daily precipitation	70.0 mm (2.8 in)	49 of 100 (Notable)
Woodhouse	Australia	Record daily precipitation	83.0 mm (3.3 in)	49 of 100 (Notable)
Williams Fk Dam	United States	Record daily snowfall	15.2 cm (6.0 in)	49 of 100 (Notable)
Ironwood	United States	Record daily precipitation	45.5 mm (1.8 in)	49 of 100 (Notable)
Blanding	United States	Record low maximum temperature	6.7 C (44.1 F)	49 of 100 (Notable)

Counts by Type and Timescale

1,855 records

Records set or tied on 18 May 2017 by type: Highest daily maximum 320, Lowest daily maximum 291, Highest daily minimum 523, Lowest daily minimum 196, Heaviest daily rainfall 375, Heaviest daily snowfall 86, Deepest snow cover 64.

Records on 18 May 2017 by type
Record type	Records
Highest daily maximum	320
Lowest daily maximum	291
Highest daily minimum	523
Lowest daily minimum	196
Heaviest daily rainfall	375
Heaviest daily snowfall	86
Deepest snow cover	64

Records on 18 May 2017 by timescale: all-time 3, monthly 73, daily 1,779.

How Much Records Were Beaten By

1,558 broken records

Margins by which the 1,558 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 406.0. Ties are not counted.

Top 20 by Significance

18 May 2017

Top 20 records on 18 May 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 2017	Hayden, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	108 years	80 of 100 (Exceptional)
18 May 2017	Minocqua, US	daily rain	73.7 mm (2.9 in)	43.7 mm (1.7 in)	79 years	73 of 100 (Major)
18 May 2017	Mystic Lake, US	monthly snowfall	91.4 cm (36.0 in)	40.6 cm (16.0 in)	42 years	71 of 100 (Major)
18 May 2017	Mystic Lake, US	daily rain	74.9 mm (2.9 in)	42.4 mm (1.7 in)	72 years	70 of 100 (Major)
18 May 2017	Gilberton, AU	daily rain	63.0 mm (2.5 in)	51.1 mm (2.0 in)	84 years	69 of 100 (Major)
18 May 2017	Mellen 4 NE, US	daily rain	62.7 mm (2.5 in)	34.8 mm (1.4 in)	79 years	68 of 100 (Major)
18 May 2017	Phillips, US	daily snowfall	38.1 cm (15.0 in)	38.1 cm (15.0 in)	68 years	67 of 100 (Major)
18 May 2017	Spring Creek Station, AU	daily rain	87.2 mm (3.4 in)	81.6 mm (3.2 in)	54 years	66 of 100 (Major)
18 May 2017	Climax, US	daily snowfall	38.1 cm (15.0 in)	27.9 cm (11.0 in)	55 years	66 of 100 (Major)
18 May 2017	Wausaukee, US	daily rain	56.4 mm (2.2 in)	38.4 mm (1.5 in)	59 years	66 of 100 (Major)
18 May 2017	Ravenswood Post Office, AU	daily rain	68.0 mm (2.7 in)	53.3 mm (2.1 in)	58 years	65 of 100 (Major)
18 May 2017	Ft Collins, US	daily rain	70.4 mm (2.8 in)	23.9 mm (0.9 in)	102 years	64 of 100 (Major)
18 May 2017	Meeker, US	daily snowfall	12.2 cm (4.8 in)	12.2 cm (4.8 in)	120 years	64 of 100 (Major)
18 May 2017	Hebgen Dam, US	daily snowfall	17.8 cm (7.0 in)	12.7 cm (5.0 in)	108 years	64 of 100 (Major)
18 May 2017	Cheyenne, US	daily snowfall	27.9 cm (11.0 in)	15.2 cm (6.0 in)	102 years	64 of 100 (Major)
18 May 2017	Bahraich, IN	daily rain	43.9 mm (1.7 in)	31.2 mm (1.2 in)	111 years	63 of 100 (Major)
18 May 2017	Breckenridge, US	daily snowfall	40.1 cm (15.8 in)	33.7 cm (13.3 in)	46 years	63 of 100 (Major)
18 May 2017	Lamar Rs, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	94 years	63 of 100 (Major)
18 May 2017	Boulder, US	daily rain	79.0 mm (3.1 in)	29.2 mm (1.1 in)	82 years	62 of 100 (Major)
18 May 2017	Winter, US	daily rain	61.0 mm (2.4 in)	29.2 mm (1.1 in)	79 years	62 of 100 (Major)

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

1796 to 2017

Records set or tied on this calendar date in each year from 1796 to 2017. 2017 had 1,855 records.

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

Records on 05-18 in each year
Year	Records
1796	1
1798	1
1802	2
1832	1
1833	1
1845	1
1847	1
1848	1
1855	1
1859	1
1861	2
1863	3
1864	1
1866	2
1868	2
1869	1
1870	1
1871	2
1872	1
1874	2
1877	4
1878	1
1879	1
1881	1
1883	2
1884	2
1885	1
1887	1
1888	4
1889	2
1891	1
1893	2
1894	4
1895	5
1896	2
1897	2
1898	1
1899	1
1900	13
1901	6
1902	9
1903	7
1904	11
1905	2
1906	24
1907	18
1908	5
1909	12
1910	50
1911	64
1912	5
1913	11
1914	45
1915	55
1916	74
1917	30
1918	42
1919	30
1920	26
1921	41
1922	33
1923	61
1924	92
1925	220
1926	133
1927	180
1928	160
1929	193
1930	475
1931	191
1932	460
1933	380
1934	390
1935	400
1936	282
1937	348
1938	382
1939	169
1940	315
1941	334
1942	421
1943	744
1944	496
1945	706
1946	651
1947	231
1948	426
1949	597
1950	473
1951	279
1952	493
1953	393
1954	498
1955	848
1956	795
1957	595
1958	334
1959	435
1960	404
1961	187
1962	1,199
1963	477
1964	329
1965	345
1966	438
1967	410
1968	817
1969	865
1970	703
1971	666
1972	499
1973	1,233
1974	1,097
1975	383
1976	733
1977	1,126
1978	1,090
1979	399
1980	614
1981	1,218
1982	452
1983	1,093
1984	717
1985	498
1986	1,131
1987	823
1988	1,154
1989	721
1990	753
1991	1,218
1992	921
1993	707
1994	1,015
1995	1,849
1996	1,767
1997	1,115
1998	1,060
1999	584
2000	922
2001	898
2002	1,833
2003	1,270
2004	847
2005	630
2006	1,493
2007	1,133
2008	999
2009	1,368
2010	894
2011	1,406
2012	523
2013	816
2014	609
2015	785
2016	597
2017	1,855
2018	557
2019	810
2020	706
2021	418
2022	711
2023	554
2024	551
2025	619
2026	1,131

Download the Data

Data for records on 2017-05-18: 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 2026-10-16 (16 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 100	1,509
100 to 200	37
200 to 300	4
300 to 400	7
400 to 500	1