Weather Records on 12 May 1991

1,177 weather records were set or tied worldwide on 12 May 1991. Highest significance: Zilverhout, ZA.

Key Facts for 12 May 1991

On 12 May 1991, 1,177 weather records were set or tied at long-record stations worldwide.
828 were record highs and 131 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 21 monthly and 1,154 daily.
Zilverhout set a daily record precipitation of 60.0 mm (2.4 in) on 12 May 1991.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 448 records.

Record Map

1,177 stations

1,177 station records on 12 May 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Zilverhout	South Africa	Record daily precipitation	60.0 mm (2.4 in)	62 of 100 (Major)
Makakatana	South Africa	Record daily precipitation	198.5 mm (7.8 in)	58 of 100 (Notable)
Pactola Dam	United States	Record daily precipitation	64.5 mm (2.5 in)	54 of 100 (Notable)
Orlinda	United States	Record daily precipitation	104.6 mm (4.1 in)	52 of 100 (Notable)
Uloa	South Africa	Record daily precipitation	106.0 mm (4.2 in)	49 of 100 (Notable)
Ndumu	South Africa	Record daily precipitation	73.5 mm (2.9 in)	49 of 100 (Notable)
Camp Hill 2NW	United States	Record daily precipitation	63.5 mm (2.5 in)	49 of 100 (Notable)
Plymouth Wwtp	United States	Record daily precipitation	70.6 mm (2.8 in)	48 of 100 (Notable)
Ft Meade	United States	Record daily precipitation	57.7 mm (2.3 in)	47 of 100 (Notable)
Peto (Dge)	Mexico	Record daily precipitation	84.8 mm (3.3 in)	46 of 100 (Notable)
Una (Agr)	South Africa	Record daily precipitation	37.0 mm (1.5 in)	45 of 100 (Notable)
Camdenton 2 NW	United States	Record daily precipitation	106.4 mm (4.2 in)	44 of 100 (Notable)
Hill City	United States	Record daily precipitation	45.0 mm (1.8 in)	44 of 100 (Notable)
Elkton	United States	Record daily precipitation	77.2 mm (3.0 in)	43 of 100 (Notable)
Winona	United States	Record high minimum temperature	21.1 C (70.0 F)	43 of 100 (Notable)
Ogdensburg 4 NE	United States	Record high minimum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Mamakuil	South Africa	Record daily precipitation	33.0 mm (1.3 in)	42 of 100 (Notable)
Alldays	South Africa	Record daily precipitation	37.5 mm (1.5 in)	42 of 100 (Notable)
Hartwell	United States	Record daily precipitation	53.3 mm (2.1 in)	42 of 100 (Notable)
Russellville	United States	Record daily precipitation	38.4 mm (1.5 in)	42 of 100 (Notable)
Carthage	United States	Record daily precipitation	41.1 mm (1.6 in)	42 of 100 (Notable)
Atyrau	Kazakhstan	Record low maximum temperature	9.7 C (49.5 F)	41 of 100 (Notable)
Lakeside	United States	Record daily precipitation	57.4 mm (2.3 in)	41 of 100 (Notable)
Chilton	United States	Record high minimum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Dolisie	Congo (Brazzaville)	Record daily precipitation	89.9 mm (3.5 in)	40 of 100 (Notable)
Big Rapids Wtp	United States	Record high maximum temperature	31.7 C (89.1 F)	40 of 100 (Notable)
Whitefish Pt	United States	Record high maximum temperature	23.3 C (73.9 F)	40 of 100 (Notable)
Kennebec	United States	Record high minimum temperature	18.3 C (64.9 F)	40 of 100 (Notable)
Rapid City 4NW	United States	Record daily precipitation	50.0 mm (2.0 in)	40 of 100 (Notable)
Stephan 2 NW	United States	Record high minimum temperature	16.7 C (62.1 F)	40 of 100 (Notable)
Hart	United States	Record daily precipitation	84.1 mm (3.3 in)	40 of 100 (Notable)
Oconomowoc Wwtp	United States	Record high maximum temperature	30.0 C (86.0 F)	40 of 100 (Notable)
Hluhluwe Game Reserve	South Africa	Record daily precipitation	139.5 mm (5.5 in)	39 of 100 (Notable)
Fayetteville Exp STN	United States	Record high minimum temperature	20.0 C (68.0 F)	39 of 100 (Notable)
Hartington	United States	Record high minimum temperature	18.3 C (64.9 F)	39 of 100 (Notable)
Savannah 6 SW	United States	Record daily precipitation	60.5 mm (2.4 in)	39 of 100 (Notable)
Oconomowoc Wwtp	United States	Record high minimum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
Milan 1NW	United States	Record high minimum temperature	20.0 C (68.0 F)	38 of 100 (Notable)
Winnebago	United States	Record high minimum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Creighton	United States	Record high maximum temperature	32.2 C (90.0 F)	38 of 100 (Notable)
Curtis	United States	Record high minimum temperature	16.7 C (62.1 F)	38 of 100 (Notable)
Portland Sewage Plt	United States	Record daily precipitation	61.5 mm (2.4 in)	38 of 100 (Notable)
Tooele	United States	Record low minimum temperature	-2.2 C (28.0 F)	38 of 100 (Notable)
Chilton	United States	Record high maximum temperature	30.0 C (86.0 F)	38 of 100 (Notable)
Lake Mills Wwtp	United States	Record high minimum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Ookala 223	United States	Record high maximum temperature	31.7 C (89.1 F)	38 of 100 (Notable)
Green Bay	United States	Record high minimum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Chanchichimila	Mexico	Record daily precipitation	111.8 mm (4.4 in)	37 of 100 (Notable)
Forest City 2 NNE	United States	Record high minimum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Sioux Ctr 2 SE	United States	Record high minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Toledo 3N	United States	Record high minimum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Paradise Steam Plt	United States	Record daily precipitation	55.9 mm (2.2 in)	37 of 100 (Notable)
Orono	United States	Record high minimum temperature	10.0 C (50.0 F)	37 of 100 (Notable)
Sunburst 8 E	United States	Record daily precipitation	34.8 mm (1.4 in)	37 of 100 (Notable)
Osceola	United States	Record high minimum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Purdum	United States	Record high minimum temperature	17.2 C (63.0 F)	37 of 100 (Notable)
Mellette 4 W	United States	Record high minimum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Sovetsk	Lithuania	Record daily precipitation	39.1 mm (1.5 in)	36 of 100 (Notable)
Elandspoort	South Africa	Record daily precipitation	29.5 mm (1.2 in)	36 of 100 (Notable)
Le Mars	United States	Record high minimum temperature	17.2 C (63.0 F)	36 of 100 (Notable)

Counts by Type and Timescale

1,177 records

Records set or tied on 12 May 1991 by type: Highest daily maximum 319, Lowest daily maximum 63, Highest daily minimum 509, Lowest daily minimum 68, Heaviest daily rainfall 216, Heaviest daily snowfall 2.

Records on 12 May 1991 by type
Record type	Records
Highest daily maximum	319
Lowest daily maximum	63
Highest daily minimum	509
Lowest daily minimum	68
Heaviest daily rainfall	216
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 12 May 1991 by timescale: all-time 2, monthly 21, daily 1,154.

How Much Records Were Beaten By

885 broken records

Margins by which the 885 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 89.9. Ties are not counted.

Top 20 by Significance

12 May 1991

Top 20 records on 12 May 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1991	Zilverhout, ZA	daily rain	60.0 mm (2.4 in)	46.0 mm (1.8 in)	56 years	62 of 100 (Major)
12 May 1991	Makakatana, ZA	monthly rain	198.5 mm (7.8 in)	85.5 mm (3.4 in)	9 years	58 of 100 (Notable)
12 May 1991	Pactola Dam, US	daily rain	64.5 mm (2.5 in)	46.2 mm (1.8 in)	33 years	54 of 100 (Notable)
12 May 1991	Orlinda, US	daily rain	104.6 mm (4.1 in)	89.9 mm (3.5 in)	26 years	52 of 100 (Notable)
12 May 1991	Uloa, ZA	daily rain	106.0 mm (4.2 in)	66.0 mm (2.6 in)	20 years	49 of 100 (Notable)
12 May 1991	Ndumu, ZA	daily rain	73.5 mm (2.9 in)	58.5 mm (2.3 in)	9 years	49 of 100 (Notable)
12 May 1991	Camp Hill 2NW, US	daily rain	63.5 mm (2.5 in)	19.6 mm (0.8 in)	88 years	49 of 100 (Notable)
12 May 1991	Plymouth Wwtp, US	daily rain	70.6 mm (2.8 in)	39.9 mm (1.6 in)	12 years	48 of 100 (Notable)
12 May 1991	Ft Meade, US	daily rain	57.7 mm (2.3 in)	45.0 mm (1.8 in)	8 years	47 of 100 (Notable)
12 May 1991	Peto (Dge), MX	daily rain	84.8 mm (3.3 in)	72.4 mm (2.9 in)	22 years	46 of 100 (Notable)
12 May 1991	Una (Agr), ZA	daily rain	37.0 mm (1.5 in)	20.7 mm (0.8 in)	66 years	45 of 100 (Notable)
12 May 1991	Camdenton 2 NW, US	daily rain	106.4 mm (4.2 in)	51.8 mm (2.0 in)	20 years	44 of 100 (Notable)
12 May 1991	Hill City, US	daily rain	45.0 mm (1.8 in)	34.8 mm (1.4 in)	10 years	44 of 100 (Notable)
12 May 1991	Elkton, US	daily rain	77.2 mm (3.0 in)	59.4 mm (2.3 in)	20 years	43 of 100 (Notable)
12 May 1991	Winona, US	daily high min	21.1 C (70.0 F)	3.3 C (5.9 F)	94 years	43 of 100 (Notable)
12 May 1991	Ogdensburg 4 NE, US	daily high min	15.6 C (60.1 F)	2.8 C (5.0 F)	93 years	43 of 100 (Notable)
12 May 1991	Mamakuil, ZA	daily rain	33.0 mm (1.3 in)	27.4 mm (1.1 in)	54 years	42 of 100 (Notable)
12 May 1991	Alldays, ZA	daily rain	37.5 mm (1.5 in)	19.7 mm (0.8 in)	54 years	42 of 100 (Notable)
12 May 1991	Hartwell, US	daily rain	53.3 mm (2.1 in)	16.0 mm (0.6 in)	76 years	42 of 100 (Notable)
12 May 1991	Russellville, US	daily rain	38.4 mm (1.5 in)	15.5 mm (0.6 in)	70 years	42 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 1991

Records set or tied on this calendar date in each year from 1814 to 1991. 1991 had 1,177 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 1991-05-12: 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 20	843
20 to 40	26
40 to 60	9
60 to 80	5
80 to 100	2