Weather Records on 12 May 2017

529 weather records were set or tied worldwide on 12 May 2017. Highest significance: Oswego 1 N, US.

Key Facts for 12 May 2017

On 12 May 2017, 529 weather records were set or tied at long-record stations worldwide.
182 were record highs and 160 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 11 monthly and 517 daily.
Oswego 1 N set a daily record precipitation of 104.1 mm (4.1 in) on 12 May 2017.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 452 records.

Record Map

529 stations

529 station records on 12 May 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Oswego 1 N	United States	Record daily precipitation	104.1 mm (4.1 in)	80 of 100 (Exceptional)
Akune	Japan	Record daily precipitation	220.0 mm (8.7 in)	57 of 100 (Notable)
Ballyshannon (Cathleens Fall)	Ireland	Record daily precipitation	28.3 mm (1.1 in)	55 of 100 (Notable)
Ft Valley	United States	Record daily precipitation	25.1 mm (1.0 in)	54 of 100 (Notable)
Halenanaho 1006	United States	Record daily precipitation	64.3 mm (2.5 in)	54 of 100 (Notable)
Oake Marsh Farm	Australia	Record daily precipitation	46.6 mm (1.8 in)	53 of 100 (Notable)
Ponce 4 E	Puerto Rico [United States]	Record low minimum temperature	14.4 C (57.9 F)	47 of 100 (Notable)
Jefferson	United States	Record daily precipitation	78.7 mm (3.1 in)	47 of 100 (Notable)
Brownsville	United States	Record high maximum temperature	36.7 C (98.1 F)	47 of 100 (Notable)
La Serena	Chile	Record daily precipitation	71.4 mm (2.8 in)	44 of 100 (Notable)
Clinton	United States	Record daily precipitation	62.0 mm (2.4 in)	44 of 100 (Notable)
Ponce 4 E	Puerto Rico [United States]	Record daily precipitation	57.2 mm (2.3 in)	43 of 100 (Notable)
Grenola 1 N	United States	Record daily precipitation	65.3 mm (2.6 in)	42 of 100 (Notable)
Colville	United States	Record low maximum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Hitoyoshi	Japan	Record daily precipitation	150.1 mm (5.9 in)	40 of 100 (Notable)
Hopewell	United States	Record low maximum temperature	13.9 C (57.0 F)	40 of 100 (Notable)
Salekhard	Russia	Record low maximum temperature	-8.4 C (16.9 F)	39 of 100 (Notable)
Skovorodino	Russia	Record high minimum temperature	8.9 C (48.0 F)	39 of 100 (Notable)
Sheridan	United States	Record daily precipitation	82.0 mm (3.2 in)	39 of 100 (Notable)
Moccasin Exp STN	United States	Record daily precipitation	35.8 mm (1.4 in)	39 of 100 (Notable)
Confluence 1 SW Dam	United States	Record daily precipitation	40.4 mm (1.6 in)	39 of 100 (Notable)
Astoria AP (Port of)	United States	Record daily precipitation	34.3 mm (1.4 in)	39 of 100 (Notable)
Katta Barega	Australia	Record daily precipitation	58.7 mm (2.3 in)	38 of 100 (Notable)
Williamsburg 2 N	United States	Record daily precipitation	38.6 mm (1.5 in)	38 of 100 (Notable)
Dubois Exp STN	United States	Record high minimum temperature	11.1 C (52.0 F)	37 of 100 (Notable)
Moorefield 1 SSE	United States	Record low maximum temperature	11.7 C (53.1 F)	37 of 100 (Notable)
Dolisie	Congo (Brazzaville)	Record low minimum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Yongan	China	Record daily precipitation	87.9 mm (3.5 in)	36 of 100 (Notable)
Longzhou	China	Record daily precipitation	41.4 mm (1.6 in)	36 of 100 (Notable)
Ajo	United States	Record low minimum temperature	6.7 C (44.1 F)	36 of 100 (Notable)
Evening Shade 1 NNE	United States	Record daily precipitation	83.8 mm (3.3 in)	36 of 100 (Notable)
Prachuap Khiri Khan	Thailand	Record daily precipitation	56.1 mm (2.2 in)	35 of 100 (Notable)
Oden 1 SE	United States	Record daily precipitation	55.9 mm (2.2 in)	35 of 100 (Notable)
Mackay Lost Rvr Rs	United States	Record high minimum temperature	8.3 C (46.9 F)	35 of 100 (Notable)
Cape Hermes	South Africa	Record daily precipitation	34.0 mm (1.3 in)	34 of 100 (Routine)
Mooringsport 1 N	United States	Record daily precipitation	67.3 mm (2.6 in)	34 of 100 (Routine)
Glasgow #2	United States	Record high minimum temperature	13.9 C (57.0 F)	34 of 100 (Routine)
Cape le Grand Nat Park	Australia	Record daily precipitation	50.0 mm (2.0 in)	32 of 100 (Routine)
Kolka	Latvia	Record low minimum temperature	-3.6 C (25.5 F)	32 of 100 (Routine)
Bardufoss	Norway	Record low minimum temperature	-7.2 C (19.0 F)	32 of 100 (Routine)
Aleksandrov Gaj	Russia	Record low minimum temperature	-1.7 C (28.9 F)	32 of 100 (Routine)
Norwich	United States	Record daily precipitation	131.6 mm (5.2 in)	32 of 100 (Routine)
Tellico Plains	United States	Record daily precipitation	26.7 mm (1.1 in)	32 of 100 (Routine)
Naselle 2 ENE	United States	Record daily precipitation	36.8 mm (1.4 in)	32 of 100 (Routine)
Fukue	Japan	Record daily precipitation	142.0 mm (5.6 in)	31 of 100 (Routine)
Malmberget	Sweden	Record low minimum temperature	-8.0 C (17.6 F)	31 of 100 (Routine)
Waterford (Tycor)	Ireland	Record daily precipitation	28.4 mm (1.1 in)	30 of 100 (Routine)
Huntingdon Wtp	United States	Record daily precipitation	43.9 mm (1.7 in)	30 of 100 (Routine)
Centralia	United States	Record low maximum temperature	11.1 C (52.0 F)	30 of 100 (Routine)
Richmond Intl AP	United States	Record daily precipitation	35.8 mm (1.4 in)	30 of 100 (Routine)
Esperance	Australia	Record daily precipitation	43.0 mm (1.7 in)	29 of 100 (Routine)
Second Beach	Australia	Record daily precipitation	41.8 mm (1.6 in)	29 of 100 (Routine)
Nanning	China	Record daily precipitation	94.0 mm (3.7 in)	29 of 100 (Routine)
Masljanino	Russia	Record high minimum temperature	13.0 C (55.4 F)	29 of 100 (Routine)
Batesville Lvstk	United States	Record daily precipitation	52.6 mm (2.1 in)	29 of 100 (Routine)
Longton	United States	Record daily precipitation	40.1 mm (1.6 in)	29 of 100 (Routine)
Beltsville	United States	Record low maximum temperature	12.8 C (55.0 F)	29 of 100 (Routine)
Long Creek	United States	Record high minimum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Saran-Paul	Russia	Record low maximum temperature	-1.8 C (28.8 F)	28 of 100 (Routine)
Kaliningrad	Russia	Record low minimum temperature	-0.8 C (30.6 F)	28 of 100 (Routine)

Counts by Type and Timescale

529 records

Records set or tied on 12 May 2017 by type: Highest daily maximum 74, Lowest daily maximum 80, Highest daily minimum 108, Lowest daily minimum 80, Heaviest daily rainfall 183, Heaviest daily snowfall 1, Deepest snow cover 3.

Records on 12 May 2017 by type
Record type	Records
Highest daily maximum	74
Lowest daily maximum	80
Highest daily minimum	108
Lowest daily minimum	80
Heaviest daily rainfall	183
Heaviest daily snowfall	1
Deepest snow cover	3

Records on 12 May 2017 by timescale: all-time 1, monthly 11, daily 517.

How Much Records Were Beaten By

433 broken records

Margins by which the 433 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 80.0. Ties are not counted.

Top 20 by Significance

12 May 2017

Top 20 records on 12 May 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 2017	Oswego 1 N, US	daily rain	104.1 mm (4.1 in)	72.3 mm (2.8 in)	114 years	80 of 100 (Exceptional)
12 May 2017	Akune, JP	monthly rain	220.0 mm (8.7 in)	48.6 mm (1.9 in)	65 years	57 of 100 (Notable)
12 May 2017	Ballyshannon (Cathleens Fall), IE	daily rain	28.3 mm (1.1 in)	16.3 mm (0.6 in)	44 years	55 of 100 (Notable)
12 May 2017	Ft Valley, US	daily rain	25.1 mm (1.0 in)	15.4 mm (0.6 in)	60 years	54 of 100 (Notable)
12 May 2017	Halenanaho 1006, US	daily rain	64.3 mm (2.5 in)	41.7 mm (1.6 in)	40 years	54 of 100 (Notable)
12 May 2017	Oake Marsh Farm, AU	daily rain	46.6 mm (1.8 in)	22.2 mm (0.9 in)	56 years	53 of 100 (Notable)
12 May 2017	Ponce 4 E, PR	daily low min	14.4 C (57.9 F)	1.2 C (2.2 F)	116 years	47 of 100 (Notable)
12 May 2017	Jefferson, US	daily rain	78.7 mm (3.1 in)	30.4 mm (1.2 in)	71 years	47 of 100 (Notable)
12 May 2017	Brownsville, US	daily high max	36.7 C (98.1 F)	2.3 C (4.1 F)	96 years	47 of 100 (Notable)
12 May 2017	La Serena, CL	daily rain	71.4 mm (2.8 in)	67.3 mm (2.6 in)	36 years	44 of 100 (Notable)
12 May 2017	Clinton, US	daily rain	62.0 mm (2.4 in)	18.1 mm (0.7 in)	84 years	44 of 100 (Notable)
12 May 2017	Ponce 4 E, PR	daily rain	57.2 mm (2.3 in)	23.4 mm (0.9 in)	68 years	43 of 100 (Notable)
12 May 2017	Grenola 1 N, US	daily rain	65.3 mm (2.6 in)	36.6 mm (1.4 in)	35 years	42 of 100 (Notable)
12 May 2017	Colville, US	daily low max	12.8 C (55.0 F)	0.5 C (0.9 F)	108 years	41 of 100 (Notable)
12 May 2017	Hitoyoshi, JP	daily rain	150.1 mm (5.9 in)	71.1 mm (2.8 in)	19 years	40 of 100 (Notable)
12 May 2017	Hopewell, US	daily low max	13.9 C (57.0 F)	2.2 C (4.0 F)	84 years	40 of 100 (Notable)
12 May 2017	Salekhard, RU	daily low max	-8.4 C (16.9 F)	0.4 C (0.7 F)	99 years	39 of 100 (Notable)
12 May 2017	Skovorodino, RU	daily high min	8.9 C (48.0 F)	1.0 C (1.8 F)	91 years	39 of 100 (Notable)
12 May 2017	Sheridan, US	daily rain	82.0 mm (3.2 in)	45.2 mm (1.8 in)	38 years	39 of 100 (Notable)
12 May 2017	Moccasin Exp STN, US	daily rain	35.8 mm (1.4 in)	15.2 mm (0.6 in)	26 years	39 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

1814 to 2017

Records set or tied on this calendar date in each year from 1814 to 2017. 2017 had 529 records.

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

Records on 05-12 in each year
Year	Records
1814	2
1823	1
1825	1
1827	1
1834	1
1837	1
1838	1
1845	1
1847	1
1848	1
1849	2
1851	1
1855	2
1860	2
1862	2
1863	1
1867	1
1868	1
1872	2
1874	1
1877	1
1878	1
1879	1
1881	4
1882	5
1884	3
1885	2
1886	3
1887	1
1888	1
1889	1
1890	1
1891	4
1894	1
1895	1
1896	1
1897	7
1898	3
1900	3
1901	6
1902	5
1903	7
1904	11
1905	10
1906	20
1907	53
1908	12
1909	4
1910	9
1911	37
1912	46
1913	6
1914	36
1915	50
1916	42
1917	54
1918	113
1919	42
1920	19
1921	64
1922	43
1923	109
1924	245
1925	275
1926	121
1927	167
1928	192
1929	172
1930	500
1931	350
1932	199
1933	476
1934	293
1935	404
1936	329
1937	214
1938	394
1939	233
1940	440
1941	568
1942	418
1943	803
1944	368
1945	389
1946	653
1947	286
1948	390
1949	414
1950	283
1951	427
1952	711
1953	891
1954	305
1955	265
1956	1,568
1957	454
1958	714
1959	740
1960	1,583
1961	381
1962	713
1963	777
1964	401
1965	196
1966	909
1967	810
1968	890
1969	506
1970	698
1971	668
1972	641
1973	393
1974	702
1975	418
1976	541
1977	855
1978	802
1979	763
1980	684
1981	855
1982	763
1983	1,281
1984	887
1985	1,199
1986	473
1987	1,295
1988	619
1989	856
1990	617
1991	1,177
1992	1,022
1993	1,208
1994	738
1995	1,190
1996	1,420
1997	921
1998	1,576
1999	881
2000	1,486
2001	1,015
2002	1,027
2003	861
2004	1,054
2005	1,369
2006	797
2007	630
2008	858
2009	687
2010	1,250
2011	1,119
2012	660
2013	689
2014	949
2015	958
2016	421
2017	529
2018	819
2019	784
2020	1,338
2021	712
2022	1,930
2023	429
2024	447
2025	940
2026	1,110

Download the Data

Data for records on 2017-05-12: 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	377
10 to 20	32
20 to 30	9
30 to 40	5
40 to 50	5
50 to 60	1
60 to 70	1
70 to 80	3