Weather Records on 31 May 2017

440 weather records were set or tied worldwide on 31 May 2017. Highest significance: Tillabery, NE.

Key Facts for 31 May 2017

On 31 May 2017, 440 weather records were set or tied at long-record stations worldwide.
252 were record highs and 105 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 21 monthly and 419 daily.
Tillabery set a daily record precipitation of 40.9 mm (1.6 in) on 31 May 2017.
Across 161 earlier years (1811 to 2026) the same calendar date averaged 438 records.

Record Map

440 stations

440 station records on 31 May 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 May 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tillabery	Niger	Record daily precipitation	40.9 mm (1.6 in)	64 of 100 (Major)
Graz	Austria	Record high minimum temperature	18.5 C (65.3 F)	49 of 100 (Notable)
Auvergne	France	Record daily precipitation	49.5 mm (1.9 in)	49 of 100 (Notable)
Shillong	India	Record daily precipitation	87.9 mm (3.5 in)	46 of 100 (Notable)
Mahabaleshwar	India	Record daily precipitation	77.0 mm (3.0 in)	45 of 100 (Notable)
Highmore	United States	Record low minimum temperature	-0.6 C (30.9 F)	45 of 100 (Notable)
Sugar City	United States	Record high minimum temperature	11.1 C (52.0 F)	44 of 100 (Notable)
Makaweli 965	United States	Record high minimum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Alonnah Area School	Australia	Record daily precipitation	30.6 mm (1.2 in)	42 of 100 (Notable)
Elmira	United States	Record daily precipitation	35.6 mm (1.4 in)	42 of 100 (Notable)
Superior	United States	Record low minimum temperature	5.0 C (41.0 F)	41 of 100 (Notable)
Batesburg	United States	Record low maximum temperature	27.2 C (81.0 F)	41 of 100 (Notable)
Wien	Austria	Record high minimum temperature	19.5 C (67.1 F)	40 of 100 (Notable)
Trujillo Alto 2 SSW	Puerto Rico [United States]	Record high minimum temperature	27.8 C (82.0 F)	40 of 100 (Notable)
Mayport Pilot STN	United States	Record daily precipitation	41.4 mm (1.6 in)	40 of 100 (Notable)
Zdvinsk	Russia	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Ko Samui	Thailand	Record daily precipitation	55.1 mm (2.2 in)	39 of 100 (Notable)
Montrose #2	United States	Record high minimum temperature	13.9 C (57.0 F)	38 of 100 (Notable)
Castolon	United States	Record daily precipitation	25.1 mm (1.0 in)	38 of 100 (Notable)
Masirah	Oman	Record high maximum temperature	45.0 C (113.0 F)	37 of 100 (Notable)
Jalapa Ver.	Mexico	Record daily precipitation	48.8 mm (1.9 in)	34 of 100 (Routine)
Tot-Ma	Russia	Record low minimum temperature	-2.4 C (27.7 F)	34 of 100 (Routine)
Szombathely	Hungary	Record high minimum temperature	16.6 C (61.9 F)	33 of 100 (Routine)
Sandpoint Exp STN	United States	Record high minimum temperature	16.7 C (62.1 F)	33 of 100 (Routine)
Summerville 4W	United States	Record high minimum temperature	22.2 C (72.0 F)	33 of 100 (Routine)
Middleton Post Office	Australia	Record daily precipitation	26.0 mm (1.0 in)	32 of 100 (Routine)
Garmisch-Partenkirchen	Germany	Record high minimum temperature	14.4 C (57.9 F)	32 of 100 (Routine)
Man	Cote D'Ivoire	Record daily precipitation	69.1 mm (2.7 in)	32 of 100 (Routine)
Medina 1NE	United States	Record daily precipitation	49.5 mm (1.9 in)	32 of 100 (Routine)
Cuernavaca	Mexico	Record low minimum temperature	12.6 C (54.7 F)	31 of 100 (Routine)
Verhnjaja Gutara	Russia	Record high minimum temperature	8.0 C (46.4 F)	31 of 100 (Routine)
Big Falls	United States	Record low maximum temperature	10.6 C (51.1 F)	31 of 100 (Routine)
Mierkenis_A	Sweden	Record low maximum temperature	2.0 C (35.6 F)	30 of 100 (Routine)
Troickij Priisk	Russia	Record low minimum temperature	-8.6 C (16.5 F)	29 of 100 (Routine)
Louisville	United States	Record daily precipitation	73.7 mm (2.9 in)	29 of 100 (Routine)
Cuernavaca	Mexico	Record daily precipitation	40.9 mm (1.6 in)	28 of 100 (Routine)
Science Garden	Philippines	Record daily precipitation	86.6 mm (3.4 in)	28 of 100 (Routine)
Plant City	United States	Record high minimum temperature	23.3 C (73.9 F)	28 of 100 (Routine)
St Martinville 3 SW	United States	Record daily precipitation	72.6 mm (2.9 in)	28 of 100 (Routine)
Columbia	United States	Record low maximum temperature	23.3 C (73.9 F)	28 of 100 (Routine)
Lamar Rs	United States	Record high minimum temperature	5.0 C (41.0 F)	28 of 100 (Routine)
Willis Island	Australia	Record daily precipitation	34.3 mm (1.4 in)	27 of 100 (Routine)
Hangzhou	China	Record high minimum temperature	24.9 C (76.8 F)	27 of 100 (Routine)
Amilcar Cabral Intl	Cape Verde	Record high minimum temperature	22.5 C (72.5 F)	27 of 100 (Routine)
Mukteshwar Kumaon	India	Record daily precipitation	31.0 mm (1.2 in)	27 of 100 (Routine)
Capitan Fap Guillermo Concha	Peru	Record low maximum temperature	26.4 C (79.5 F)	27 of 100 (Routine)
Dry Tortugas	United States	Record high minimum temperature	26.7 C (80.1 F)	27 of 100 (Routine)
Ft Lauderdale Beach	United States	Record high maximum temperature	32.2 C (90.0 F)	27 of 100 (Routine)
Butler 4W	United States	Record daily precipitation	42.7 mm (1.7 in)	27 of 100 (Routine)
Wakamatsu	Japan	Record high maximum temperature	31.2 C (88.2 F)	26 of 100 (Routine)
Zinder	Niger	Record high minimum temperature	29.9 C (85.8 F)	26 of 100 (Routine)
Novi Sad	Serbia	Record high maximum temperature	30.3 C (86.5 F)	26 of 100 (Routine)
Pudoz	Russia	Record low minimum temperature	-2.7 C (27.1 F)	26 of 100 (Routine)
Hilok	Russia	Record low minimum temperature	-6.0 C (21.2 F)	26 of 100 (Routine)
Homer AP	United States	Record high maximum temperature	22.2 C (72.0 F)	26 of 100 (Routine)
Dimbokro	Cote D'Ivoire	Record high minimum temperature	25.0 C (77.0 F)	25 of 100 (Routine)
Sortland-Kleiva	Norway	Record low minimum temperature	0.5 C (32.9 F)	25 of 100 (Routine)
Borzja	Russia	Record low minimum temperature	-4.2 C (24.4 F)	25 of 100 (Routine)
Billingsley	United States	Record daily precipitation	25.1 mm (1.0 in)	25 of 100 (Routine)
Lsu Ben-Hur Farm	United States	Record daily precipitation	67.6 mm (2.7 in)	25 of 100 (Routine)

Counts by Type and Timescale

440 records

Records set or tied on 31 May 2017 by type: Highest daily maximum 87, Lowest daily maximum 41, Highest daily minimum 165, Lowest daily minimum 64, Heaviest daily rainfall 83.

Records on 31 May 2017 by type
Record type	Records
Highest daily maximum	87
Lowest daily maximum	41
Highest daily minimum	165
Lowest daily minimum	64
Heaviest daily rainfall	83
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 May 2017 by timescale: all-time 0, monthly 21, daily 419.

How Much Records Were Beaten By

341 broken records

Margins by which the 341 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 45.2. Ties are not counted.

Top 20 by Significance

31 May 2017

Top 20 records on 31 May 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 May 2017	Tillabery, NE	daily rain	40.9 mm (1.6 in)	32.4 mm (1.3 in)	66 years	64 of 100 (Major)
31 May 2017	Graz, AT	monthly high min	18.5 C (65.3 F)	0.2 C (0.4 F)	97 years	49 of 100 (Notable)
31 May 2017	Auvergne, FR	daily rain	49.5 mm (1.9 in)	38.1 mm (1.5 in)	19 years	49 of 100 (Notable)
31 May 2017	Shillong, IN	daily rain	87.9 mm (3.5 in)	31.8 mm (1.3 in)	67 years	46 of 100 (Notable)
31 May 2017	Mahabaleshwar, IN	daily rain	77.0 mm (3.0 in)	25.7 mm (1.0 in)	74 years	45 of 100 (Notable)
31 May 2017	Highmore, US	daily low min	-0.6 C (30.9 F)	2.8 C (5.0 F)	100 years	45 of 100 (Notable)
31 May 2017	Sugar City, US	daily high min	11.1 C (52.0 F)	1.7 C (3.1 F)	106 years	44 of 100 (Notable)
31 May 2017	Makaweli 965, US	daily high min	22.8 C (73.0 F)	0.6 C (1.1 F)	110 years	43 of 100 (Notable)
31 May 2017	Alonnah Area School, AU	daily rain	30.6 mm (1.2 in)	13.1 mm (0.5 in)	46 years	42 of 100 (Notable)
31 May 2017	Elmira, US	daily rain	35.6 mm (1.4 in)	1.8 mm (0.07 in)	123 years	42 of 100 (Notable)
31 May 2017	Superior, US	daily low min	5.0 C (41.0 F)	0.6 C (1.1 F)	114 years	41 of 100 (Notable)
31 May 2017	Batesburg, US	daily low max	27.2 C (81.0 F)	0.6 C (1.1 F)	110 years	41 of 100 (Notable)
31 May 2017	Wien, AT	daily high min	19.5 C (67.1 F)	0.2 C (0.4 F)	149 years	40 of 100 (Notable)
31 May 2017	Trujillo Alto 2 SSW, PR	monthly high min	27.8 C (82.0 F)	1.7 C (3.1 F)	48 years	40 of 100 (Notable)
31 May 2017	Mayport Pilot STN, US	daily rain	41.4 mm (1.6 in)	30.2 mm (1.2 in)	54 years	40 of 100 (Notable)
31 May 2017	Zdvinsk, RU	daily rain	29.0 mm (1.1 in)	10.5 mm (0.4 in)	16 years	39 of 100 (Notable)
31 May 2017	Ko Samui, TH	daily rain	55.1 mm (2.2 in)	35.0 mm (1.4 in)	26 years	39 of 100 (Notable)
31 May 2017	Montrose #2, US	daily high min	13.9 C (57.0 F)	0.6 C (1.1 F)	92 years	38 of 100 (Notable)
31 May 2017	Castolon, US	daily rain	25.1 mm (1.0 in)	18.7 mm (0.7 in)	24 years	38 of 100 (Notable)
31 May 2017	Masirah, OM	daily high max	45.0 C (113.0 F)	6.5 C (11.7 F)	11 years	37 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

1811 to 2017

Records set or tied on this calendar date in each year from 1811 to 2017. 2017 had 440 records.

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

Records on 05-31 in each year
Year	Records
1811	1
1818	3
1827	1
1836	2
1845	1
1847	1
1853	2
1855	2
1858	1
1864	2
1865	1
1866	1
1867	1
1868	4
1869	1
1871	2
1873	3
1874	1
1877	1
1878	2
1879	2
1880	3
1882	1
1883	1
1885	1
1888	1
1889	2
1890	1
1892	1
1893	4
1894	2
1895	8
1897	5
1898	7
1899	1
1900	2
1901	9
1902	9
1903	17
1904	19
1905	7
1906	11
1907	20
1908	12
1909	8
1910	26
1911	20
1912	15
1913	83
1914	20
1915	23
1916	23
1917	13
1918	20
1919	44
1920	46
1921	157
1922	49
1923	98
1924	152
1925	226
1926	228
1927	121
1928	67
1929	246
1930	612
1931	223
1932	181
1933	397
1934	782
1935	156
1936	559
1937	462
1938	424
1939	461
1940	383
1941	410
1942	364
1943	552
1944	372
1945	457
1946	380
1947	439
1948	295
1949	303
1950	467
1951	640
1952	374
1953	654
1954	445
1955	534
1956	632
1957	304
1958	429
1959	459
1960	247
1961	472
1962	565
1963	354
1964	1,237
1965	494
1966	601
1967	987
1968	276
1969	555
1970	573
1971	714
1972	1,127
1973	418
1974	473
1975	797
1976	435
1977	605
1978	873
1979	915
1980	517
1981	775
1982	817
1983	1,494
1984	2,047
1985	790
1986	1,365
1987	822
1988	1,255
1989	912
1990	900
1991	1,381
1992	1,031
1993	982
1994	776
1995	693
1996	946
1997	1,163
1998	1,215
1999	790
2000	1,172
2001	1,047
2002	1,162
2003	831
2004	1,071
2005	724
2006	1,045
2007	793
2008	809
2009	570
2010	741
2011	1,498
2012	764
2013	1,100
2014	565
2015	704
2016	402
2017	440
2018	1,211
2019	420
2020	673
2021	834
2022	902
2023	454
2024	809
2025	1,204
2026	536

Download the Data

Data for records on 2017-05-31: 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 10	314
10 to 20	10
20 to 30	7
30 to 40	9
40 to 50	1