Weather Records on 12 May 2010

1,250 weather records were set or tied worldwide on 12 May 2010. Highest significance: Riverton, US.

Key Facts for 12 May 2010

On 12 May 2010, 1,250 weather records were set or tied at long-record stations worldwide.
369 were record highs and 519 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 42 monthly and 1,204 daily.
Riverton set a daily record precipitation of 52.1 mm (2.1 in) on 12 May 2010.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 448 records.

Record Map

1,250 stations

1,250 station records on 12 May 2010 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 2010: highest significance records shown on the map
Station	Country	Type	Value	Significance
Riverton	United States	Record daily precipitation	52.1 mm (2.1 in)	69 of 100 (Major)
Malung	Sweden	Record daily precipitation	34.1 mm (1.3 in)	67 of 100 (Major)
Sidney 6NNW	United States	Record daily snowfall	12.7 cm (5.0 in)	65 of 100 (Major)
Walnut 4S	United States	Record daily precipitation	99.8 mm (3.9 in)	55 of 100 (Notable)
Bridgeport	United States	Record daily snowfall	7.6 cm (3.0 in)	55 of 100 (Notable)
Riverton	United States	Record daily snowfall	26.7 cm (10.5 in)	55 of 100 (Notable)
Alliance 1WNW	United States	Record daily snowfall	6.9 cm (2.7 in)	53 of 100 (Notable)
Harrisburg 12WNW	United States	Record daily snowfall	22.9 cm (9.0 in)	53 of 100 (Notable)
Riverton	United States	Record snow depth	12.7 cm (5.0 in)	52 of 100 (Notable)
Byers 5 ENE	United States	Record daily precipitation	34.5 mm (1.4 in)	51 of 100 (Notable)
Butler 4W	United States	Record daily precipitation	88.9 mm (3.5 in)	51 of 100 (Notable)
Scottsbluff W B Heilig Fld AP	United States	Record daily snowfall	18.3 cm (7.2 in)	51 of 100 (Notable)
Stockton 3NNE	United States	Record daily precipitation	51.8 mm (2.0 in)	50 of 100 (Notable)
Bridgeport	United States	Record daily precipitation	43.2 mm (1.7 in)	50 of 100 (Notable)
Wutoschingen-Ofteringen	Germany	Record daily precipitation	52.9 mm (2.1 in)	48 of 100 (Notable)
Riddarhyttan	Sweden	Record daily precipitation	30.3 mm (1.2 in)	48 of 100 (Notable)
Ibapah	United States	Record daily precipitation	64.8 mm (2.6 in)	48 of 100 (Notable)
Portland	Australia	Record daily precipitation	36.8 mm (1.4 in)	47 of 100 (Notable)
Cherdyn'	Russia	Record high minimum temperature	15.9 C (60.6 F)	47 of 100 (Notable)
Lisskogsasen	Sweden	Record daily precipitation	37.0 mm (1.5 in)	47 of 100 (Notable)
Grand Lake 1 NW	United States	Record daily snowfall	30.5 cm (12.0 in)	47 of 100 (Notable)
Nevada Wtp	United States	Record daily precipitation	94.2 mm (3.7 in)	47 of 100 (Notable)
Rushville	United States	Record daily snowfall	10.2 cm (4.0 in)	47 of 100 (Notable)
Chugwater	United States	Record snow depth	17.8 cm (7.0 in)	47 of 100 (Notable)
Wheatland 4N	United States	Record snow depth	10.2 cm (4.0 in)	47 of 100 (Notable)
Hachinohe	Japan	Record daily precipitation	50.8 mm (2.0 in)	46 of 100 (Notable)
Regna_D	Sweden	Record daily precipitation	31.0 mm (1.2 in)	46 of 100 (Notable)
Ft Collins	United States	Record daily snowfall	10.4 cm (4.1 in)	46 of 100 (Notable)
Cedar Butte	United States	Record daily snowfall	15.2 cm (6.0 in)	46 of 100 (Notable)
Ft Robinson	United States	Record daily snowfall	10.2 cm (4.0 in)	45 of 100 (Notable)
Ft Robinson	United States	Record snow depth	10.2 cm (4.0 in)	45 of 100 (Notable)
Troicko-Pecherskoe	Russia	Record high maximum temperature	37.7 C (99.9 F)	44 of 100 (Notable)
Lillhardal	Sweden	Record daily precipitation	31.2 mm (1.2 in)	44 of 100 (Notable)
Dalton	United States	Record daily snowfall	15.2 cm (6.0 in)	44 of 100 (Notable)
Waterloo Muni AP	United States	Record daily precipitation	61.0 mm (2.4 in)	44 of 100 (Notable)
Miyako	Japan	Record daily precipitation	52.1 mm (2.1 in)	43 of 100 (Notable)
De Bilt	Netherlands	Record low maximum temperature	7.7 C (45.9 F)	43 of 100 (Notable)
Utsira Fyr	Norway	Record low minimum temperature	-0.7 C (30.7 F)	43 of 100 (Notable)
Mancos 1SW	United States	Record low maximum temperature	12.8 C (55.0 F)	43 of 100 (Notable)
Watertown Wwtp	United States	Record low maximum temperature	6.7 C (44.1 F)	43 of 100 (Notable)
Manuel Avila Camacho	Mexico	Record low maximum temperature	30.6 C (87.1 F)	42 of 100 (Notable)
Dalton	United States	Record snow depth	15.2 cm (6.0 in)	42 of 100 (Notable)
Kleve	Germany	Record low maximum temperature	7.7 C (45.9 F)	41 of 100 (Notable)
Wisley	United Kingdom	Record low minimum temperature	-2.4 C (27.7 F)	41 of 100 (Notable)
Mancos 1SW	United States	Record low minimum temperature	-7.8 C (18.0 F)	41 of 100 (Notable)
Centralia	United States	Record daily precipitation	53.3 mm (2.1 in)	41 of 100 (Notable)
Eldorado Springs	United States	Record daily precipitation	165.1 mm (6.5 in)	41 of 100 (Notable)
E Stroudsburg	United States	Record low maximum temperature	8.9 C (48.0 F)	41 of 100 (Notable)
Lead	United States	Record daily snowfall	14.0 cm (5.5 in)	41 of 100 (Notable)
Purcellville	United States	Record low maximum temperature	11.1 C (52.0 F)	41 of 100 (Notable)
Le Bourget	France	Record low maximum temperature	10.7 C (51.3 F)	40 of 100 (Notable)
Deir Zzor	Syria	Record high minimum temperature	26.5 C (79.7 F)	40 of 100 (Notable)
Ft Madison	United States	Record daily precipitation	45.0 mm (1.8 in)	40 of 100 (Notable)
Ellsworth 2W	United States	Record daily snowfall	7.6 cm (3.0 in)	40 of 100 (Notable)
Dull Ctr 1SE	United States	Record daily snowfall	14.0 cm (5.5 in)	40 of 100 (Notable)
Phillips	United States	Record daily snowfall	25.4 cm (10.0 in)	40 of 100 (Notable)
Thermopolis	United States	Record daily precipitation	41.9 mm (1.6 in)	40 of 100 (Notable)
Visby_Flygplats	Sweden	Record low minimum temperature	-2.5 C (27.5 F)	39 of 100 (Notable)
Sagen	Sweden	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Saint Bernard	United States	Record high minimum temperature	19.4 C (66.9 F)	39 of 100 (Notable)

Counts by Type and Timescale

1,250 records

Records set or tied on 12 May 2010 by type: Highest daily maximum 178, Lowest daily maximum 312, Highest daily minimum 191, Lowest daily minimum 207, Heaviest daily rainfall 256, Heaviest daily snowfall 57, Deepest snow cover 49.

Records on 12 May 2010 by type
Record type	Records
Highest daily maximum	178
Lowest daily maximum	312
Highest daily minimum	191
Lowest daily minimum	207
Heaviest daily rainfall	256
Heaviest daily snowfall	57
Deepest snow cover	49

Records on 12 May 2010 by timescale: all-time 4, monthly 42, daily 1,204.

How Much Records Were Beaten By

993 broken records

Margins by which the 993 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 216.0. Ties are not counted.

Top 20 by Significance

12 May 2010

Top 20 records on 12 May 2010 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 2010	Riverton, US	daily rain	52.1 mm (2.1 in)	30.5 mm (1.2 in)	75 years	69 of 100 (Major)
12 May 2010	Malung, SE	daily rain	34.1 mm (1.3 in)	14.0 mm (0.6 in)	97 years	67 of 100 (Major)
12 May 2010	Sidney 6NNW, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	100 years	65 of 100 (Major)
12 May 2010	Walnut 4S, US	daily rain	99.8 mm (3.9 in)	33.5 mm (1.3 in)	80 years	55 of 100 (Notable)
12 May 2010	Bridgeport, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	112 years	55 of 100 (Notable)
12 May 2010	Riverton, US	monthly snowfall	26.7 cm (10.5 in)	8.9 cm (3.5 in)	56 years	55 of 100 (Notable)
12 May 2010	Alliance 1WNW, US	daily snowfall	6.9 cm (2.7 in)	6.9 cm (2.7 in)	114 years	53 of 100 (Notable)
12 May 2010	Harrisburg 12WNW, US	monthly snowfall	22.9 cm (9.0 in)	2.6 cm (1.0 in)	94 years	53 of 100 (Notable)
12 May 2010	Riverton, US	daily snow depth	12.7 cm (5.0 in)	12.7 cm (5.0 in)	103 years	52 of 100 (Notable)
12 May 2010	Byers 5 ENE, US	daily rain	34.5 mm (1.4 in)	23.1 mm (0.9 in)	60 years	51 of 100 (Notable)
12 May 2010	Butler 4W, US	daily rain	88.9 mm (3.5 in)	44.2 mm (1.7 in)	55 years	51 of 100 (Notable)
12 May 2010	Scottsbluff W B Heilig Fld AP, US	daily snowfall	18.3 cm (7.2 in)	16.3 cm (6.4 in)	29 years	51 of 100 (Notable)
12 May 2010	Stockton 3NNE, US	daily rain	51.8 mm (2.0 in)	29.7 mm (1.2 in)	48 years	50 of 100 (Notable)
12 May 2010	Bridgeport, US	daily rain	43.2 mm (1.7 in)	20.1 mm (0.8 in)	63 years	50 of 100 (Notable)
12 May 2010	Wutoschingen-Ofteringen, DE	daily rain	52.9 mm (2.1 in)	31.2 mm (1.2 in)	11 years	48 of 100 (Notable)
12 May 2010	Riddarhyttan, SE	daily rain	30.3 mm (1.2 in)	16.6 mm (0.7 in)	27 years	48 of 100 (Notable)
12 May 2010	Ibapah, US	monthly rain	64.8 mm (2.6 in)	5.1 mm (0.20 in)	72 years	48 of 100 (Notable)
12 May 2010	Portland, AU	daily rain	36.8 mm (1.4 in)	9.1 mm (0.36 in)	75 years	47 of 100 (Notable)
12 May 2010	Cherdyn', RU	daily high min	15.9 C (60.6 F)	3.8 C (6.8 F)	104 years	47 of 100 (Notable)
12 May 2010	Lisskogsasen, SE	daily rain	37.0 mm (1.5 in)	20.2 mm (0.8 in)	20 years	47 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 2010

Records set or tied on this calendar date in each year from 1814 to 2010. 2010 had 1,250 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 2010-05-12: 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).

Histogram of margins by which records were beaten on 12 May 2010
Margin	Records
0 to 50	933
50 to 100	42
100 to 150	11
150 to 200	6
200 to 250	1