Weather Records on 12 May 1947

286 weather records were set or tied worldwide on 12 May 1947. Highest significance: Rico, US.

Key Facts for 12 May 1947

On 12 May 1947, 286 weather records were set or tied at long-record stations worldwide.
73 were record highs and 64 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 281 daily.
Rico set a daily record precipitation of 30.0 mm (1.2 in) on 12 May 1947.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 454 records.

Record Map

286 stations

286 station records on 12 May 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rico	United States	Record daily precipitation	30.0 mm (1.2 in)	48 of 100 (Notable)
Chugwater	United States	Record daily precipitation	42.4 mm (1.7 in)	45 of 100 (Notable)
Teresina	Brazil	Record daily precipitation	65.0 mm (2.6 in)	40 of 100 (Notable)
Iguape	Brazil	Record daily precipitation	66.0 mm (2.6 in)	39 of 100 (Notable)
Rico	United States	Record daily snowfall	30.5 cm (12.0 in)	39 of 100 (Notable)
Jagersfontein	South Africa	Record daily precipitation	43.2 mm (1.7 in)	37 of 100 (Notable)
Fort Simpson	Canada	Record daily snowfall	14.0 cm (5.5 in)	36 of 100 (Notable)
Erick	United States	Record daily precipitation	50.8 mm (2.0 in)	32 of 100 (Routine)
Sao Luiz Do Curu	Brazil	Record daily precipitation	60.2 mm (2.4 in)	31 of 100 (Routine)
Vertentes	Brazil	Record daily precipitation	39.5 mm (1.6 in)	31 of 100 (Routine)
Douglas 1 SE	United States	Record daily precipitation	30.7 mm (1.2 in)	29 of 100 (Routine)
Weatherford	United States	Record daily precipitation	84.3 mm (3.3 in)	28 of 100 (Routine)
Laramie	United States	Record daily snowfall	7.6 cm (3.0 in)	28 of 100 (Routine)
Clarke City	Canada	Record daily snowfall	5.3 cm (2.1 in)	27 of 100 (Routine)
Geary	United States	Record daily precipitation	77.5 mm (3.1 in)	27 of 100 (Routine)
Snyder	United States	Record daily precipitation	33.8 mm (1.3 in)	27 of 100 (Routine)
Warner Springs	United States	Record low minimum temperature	-2.8 C (27.0 F)	26 of 100 (Routine)
Hennessey 4 ESE	United States	Record daily precipitation	48.3 mm (1.9 in)	26 of 100 (Routine)
Waukomis	United States	Record daily precipitation	34.0 mm (1.3 in)	26 of 100 (Routine)
Superior	United States	Record high minimum temperature	15.0 C (59.0 F)	26 of 100 (Routine)
Harnosand	Sweden	Record high maximum temperature	22.4 C (72.3 F)	25 of 100 (Routine)
Sanborn	United States	Record daily precipitation	45.0 mm (1.8 in)	25 of 100 (Routine)
McPherson	United States	Record daily precipitation	30.5 mm (1.2 in)	25 of 100 (Routine)
Barkerville	Canada	Record daily snowfall	7.6 cm (3.0 in)	24 of 100 (Routine)
Sveg	Sweden	Record high maximum temperature	23.8 C (74.8 F)	24 of 100 (Routine)
Umea	Sweden	Record high maximum temperature	20.5 C (68.9 F)	24 of 100 (Routine)
Eastbourne	United Kingdom	Record high maximum temperature	23.3 C (73.9 F)	24 of 100 (Routine)
Canton	United States	Record daily precipitation	49.5 mm (1.9 in)	24 of 100 (Routine)
Coldwater	Canada	Record high minimum temperature	15.6 C (60.1 F)	23 of 100 (Routine)
Wellington	United States	Record daily precipitation	34.3 mm (1.4 in)	23 of 100 (Routine)
Rockingham	United States	Record low minimum temperature	2.2 C (36.0 F)	23 of 100 (Routine)
Marlow 1 WSW	United States	Record daily precipitation	56.6 mm (2.2 in)	23 of 100 (Routine)
Natashquan A	Canada	Record daily snowfall	5.1 cm (2.0 in)	22 of 100 (Routine)
Nordby (Fano)	Denmark	Record high maximum temperature	24.5 C (76.1 F)	22 of 100 (Routine)
Stockholm	Sweden	Record high minimum temperature	11.1 C (52.0 F)	22 of 100 (Routine)
Rison	United States	Record daily precipitation	50.8 mm (2.0 in)	22 of 100 (Routine)
Dahlonega 4WSW	United States	Record low minimum temperature	5.0 C (41.0 F)	22 of 100 (Routine)
Setauket Strong	United States	Record high maximum temperature	28.3 C (82.9 F)	22 of 100 (Routine)
Bristow	United States	Record daily precipitation	50.0 mm (2.0 in)	22 of 100 (Routine)
Union City 3 SE	United States	Record daily precipitation	80.0 mm (3.1 in)	22 of 100 (Routine)
Angermunde	Germany	Record high maximum temperature	31.1 C (88.0 F)	21 of 100 (Routine)
Orebro	Sweden	Record high maximum temperature	25.5 C (77.9 F)	21 of 100 (Routine)
Woodstock	United States	Record low minimum temperature	-1.1 C (30.0 F)	21 of 100 (Routine)
Mio Hydro Plt	United States	Record high minimum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Sidney 6NNW	United States	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Harrisburg 12WNW	United States	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Bedford 2 SE	United States	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Syracuse 1NE	United States	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Fort Simpson	Canada	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Bridgeport	United States	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Greeley	United States	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Svyatoy Nos;Cape(Closed)	Russia	Record daily precipitation	8.0 mm (0.31 in)	20 of 100 (Routine)
Meeker	United States	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Lowman	United States	Record daily precipitation	9.4 mm (0.37 in)	20 of 100 (Routine)
Blagovescensk	Russia	Record daily precipitation	7.5 mm (0.30 in)	20 of 100 (Routine)
Hay Springs	United States	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Vestervig	Denmark	Record high maximum temperature	25.0 C (77.0 F)	20 of 100 (Routine)
Tuba City	United States	Record low maximum temperature	13.3 C (55.9 F)	20 of 100 (Routine)
Shoshone	United States	Record daily precipitation	7.1 mm (0.28 in)	20 of 100 (Routine)
Tribune 1W	United States	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

286 records

Records set or tied on 12 May 1947 by type: Highest daily maximum 33, Lowest daily maximum 13, Highest daily minimum 40, Lowest daily minimum 51, Heaviest daily rainfall 139, Heaviest daily snowfall 10.

Records on 12 May 1947 by type
Record type	Records
Highest daily maximum	33
Lowest daily maximum	13
Highest daily minimum	40
Lowest daily minimum	51
Heaviest daily rainfall	139
Heaviest daily snowfall	10
Deepest snow cover	0

Records on 12 May 1947 by timescale: all-time 0, monthly 5, daily 281.

How Much Records Were Beaten By

247 broken records

Margins by which the 247 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 140.0. Ties are not counted.

Top 20 by Significance

12 May 1947

Top 20 records on 12 May 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1947	Rico, US	daily rain	30.0 mm (1.2 in)	22.1 mm (0.9 in)	12 years	48 of 100 (Notable)
12 May 1947	Chugwater, US	daily rain	42.4 mm (1.7 in)	24.6 mm (1.0 in)	40 years	45 of 100 (Notable)
12 May 1947	Teresina, BR	daily rain	65.0 mm (2.6 in)	48.2 mm (1.9 in)	8 years	40 of 100 (Notable)
12 May 1947	Iguape, BR	daily rain	66.0 mm (2.6 in)	29.2 mm (1.1 in)	44 years	39 of 100 (Notable)
12 May 1947	Rico, US	monthly snowfall	30.5 cm (12.0 in)	7.6 cm (3.0 in)	25 years	39 of 100 (Notable)
12 May 1947	Jagersfontein, ZA	monthly rain	43.2 mm (1.7 in)	4.6 mm (0.18 in)	55 years	37 of 100 (Notable)
12 May 1947	Fort Simpson, CA	daily snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	49 years	36 of 100 (Notable)
12 May 1947	Erick, US	daily rain	50.8 mm (2.0 in)	40.4 mm (1.6 in)	8 years	32 of 100 (Routine)
12 May 1947	Sao Luiz Do Curu, BR	daily rain	60.2 mm (2.4 in)	30.1 mm (1.2 in)	22 years	31 of 100 (Routine)
12 May 1947	Vertentes, BR	daily rain	39.5 mm (1.6 in)	21.3 mm (0.8 in)	32 years	31 of 100 (Routine)
12 May 1947	Douglas 1 SE, US	daily rain	30.7 mm (1.2 in)	17.5 mm (0.7 in)	12 years	29 of 100 (Routine)
12 May 1947	Weatherford, US	daily rain	84.3 mm (3.3 in)	28.9 mm (1.1 in)	17 years	28 of 100 (Routine)
12 May 1947	Laramie, US	daily snowfall	7.6 cm (3.0 in)	3.8 cm (1.5 in)	54 years	28 of 100 (Routine)
12 May 1947	Clarke City, CA	daily snowfall	5.3 cm (2.1 in)	5.3 cm (2.1 in)	44 years	27 of 100 (Routine)
12 May 1947	Geary, US	monthly rain	77.5 mm (3.1 in)	17.0 mm (0.7 in)	4 years	27 of 100 (Routine)
12 May 1947	Snyder, US	daily rain	33.8 mm (1.3 in)	24.7 mm (1.0 in)	22 years	27 of 100 (Routine)
12 May 1947	Warner Springs, US	monthly low min	-2.8 C (27.0 F)	0.6 C (1.1 F)	35 years	26 of 100 (Routine)
12 May 1947	Hennessey 4 ESE, US	daily rain	48.3 mm (1.9 in)	21.6 mm (0.9 in)	17 years	26 of 100 (Routine)
12 May 1947	Waukomis, US	daily rain	34.0 mm (1.3 in)	18.0 mm (0.7 in)	28 years	26 of 100 (Routine)
12 May 1947	Superior, US	daily high min	15.0 C (59.0 F)	6.1 C (11.0 F)	17 years	26 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

1814 to 1947

Records set or tied on this calendar date in each year from 1814 to 1947. 1947 had 286 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 1947-05-12: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 20	223
20 to 40	16
40 to 60	6
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	1