Weather Records on 15 May 1991

1,179 weather records were set or tied worldwide on 15 May 1991. Highest significance: Moorefield 1 SSE, US.

Key Facts for 15 May 1991

On 15 May 1991, 1,179 weather records were set or tied at long-record stations worldwide.
576 were record highs and 169 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 27 monthly and 1,150 daily.
Moorefield 1 SSE set a daily record precipitation of 60.5 mm (2.4 in) on 15 May 1991.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 426 records.

Record Map

1,179 stations

1,179 station records on 15 May 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Moorefield 1 SSE	United States	Record daily precipitation	60.5 mm (2.4 in)	71 of 100 (Major)
Rimini 2 SSW	United States	Record daily precipitation	98.3 mm (3.9 in)	67 of 100 (Major)
Fairfield	United States	Record daily precipitation	50.8 mm (2.0 in)	62 of 100 (Major)
Douglas Caa AP	United States	Record daily precipitation	81.3 mm (3.2 in)	60 of 100 (Major)
La Moure	United States	Record daily precipitation	91.4 mm (3.6 in)	59 of 100 (Notable)
Scottsbluff W B Heilig Fld AP	United States	Record daily precipitation	40.6 mm (1.6 in)	58 of 100 (Notable)
Muddy Gap	United States	Record daily precipitation	68.6 mm (2.7 in)	56 of 100 (Notable)
Palmyra	United States	Record daily precipitation	87.4 mm (3.4 in)	53 of 100 (Notable)
Hague	United States	Record daily precipitation	53.3 mm (2.1 in)	52 of 100 (Notable)
Club Crocodile Resort	Australia	Record daily precipitation	146.0 mm (5.7 in)	51 of 100 (Notable)
Tlaxco	Mexico	Record daily precipitation	59.2 mm (2.3 in)	51 of 100 (Notable)
Represa Bariri	Brazil	Record daily precipitation	70.8 mm (2.8 in)	50 of 100 (Notable)
Lyman	United States	Record daily precipitation	58.4 mm (2.3 in)	50 of 100 (Notable)
Verona	United States	Record daily precipitation	65.3 mm (2.6 in)	50 of 100 (Notable)
Leola	United States	Record daily precipitation	39.9 mm (1.6 in)	50 of 100 (Notable)
Yornup	Australia	Record daily precipitation	49.6 mm (2.0 in)	48 of 100 (Notable)
Bauru (Pdv)	Brazil	Record daily precipitation	54.1 mm (2.1 in)	48 of 100 (Notable)
Harnosand	Sweden	Record daily precipitation	33.0 mm (1.3 in)	47 of 100 (Notable)
Napoleon	United States	Record daily precipitation	41.9 mm (1.6 in)	47 of 100 (Notable)
Pirassununga	Brazil	Record daily precipitation	80.0 mm (3.1 in)	46 of 100 (Notable)
Presidente Alves	Brazil	Record daily precipitation	78.7 mm (3.1 in)	46 of 100 (Notable)
Ignacio Lopez Rayon	Mexico	Record low minimum temperature	17.8 C (64.0 F)	46 of 100 (Notable)
Forbes 10 NW	United States	Record daily precipitation	86.4 mm (3.4 in)	46 of 100 (Notable)
Fullerton 1 ESE	United States	Record daily precipitation	114.3 mm (4.5 in)	46 of 100 (Notable)
Valley City 3 NNW	United States	Record daily precipitation	34.5 mm (1.4 in)	46 of 100 (Notable)
Sao Francisco da Corredeira	Brazil	Record daily precipitation	67.7 mm (2.7 in)	45 of 100 (Notable)
Taquari-Vai	Brazil	Record daily precipitation	55.9 mm (2.2 in)	45 of 100 (Notable)
Ipswich	United States	Record daily precipitation	58.9 mm (2.3 in)	45 of 100 (Notable)
Guaianas	Brazil	Record daily precipitation	46.5 mm (1.8 in)	44 of 100 (Notable)
Tossasen	Sweden	Record daily precipitation	28.4 mm (1.1 in)	44 of 100 (Notable)
Hampton	United States	Record high minimum temperature	22.8 C (73.0 F)	44 of 100 (Notable)
Britton	United States	Record daily precipitation	50.0 mm (2.0 in)	44 of 100 (Notable)
Heron Island Res STN	Australia	Record daily precipitation	52.2 mm (2.1 in)	43 of 100 (Notable)
Texarkana Webb Fld	United States	Record daily precipitation	62.7 mm (2.5 in)	43 of 100 (Notable)
Fazenda Chantebled	Brazil	Record daily precipitation	58.5 mm (2.3 in)	42 of 100 (Notable)
Shepetivka	Ukraine	Record daily precipitation	31.0 mm (1.2 in)	42 of 100 (Notable)
Mt Pleasant 1 SW	United States	Record daily precipitation	53.3 mm (2.1 in)	42 of 100 (Notable)
Shelbina	United States	Record daily precipitation	73.7 mm (2.9 in)	42 of 100 (Notable)
Ellendale	United States	Record daily precipitation	85.1 mm (3.4 in)	42 of 100 (Notable)
Marra Creek (Womboin)	Australia	Record daily precipitation	29.0 mm (1.1 in)	41 of 100 (Notable)
Eureka	United States	Record daily precipitation	41.1 mm (1.6 in)	41 of 100 (Notable)
Uppsala_Aut	Sweden	Record low maximum temperature	6.6 C (43.9 F)	40 of 100 (Notable)
Litchville 2NW	United States	Record daily precipitation	42.7 mm (1.7 in)	40 of 100 (Notable)
Aberdeen	United States	Record daily precipitation	50.8 mm (2.0 in)	40 of 100 (Notable)
Nagasaki	Japan	Record daily precipitation	74.9 mm (2.9 in)	39 of 100 (Notable)
Tula (Dge)	Mexico	Record low minimum temperature	0.6 C (33.1 F)	39 of 100 (Notable)
Galva	United States	Record high minimum temperature	17.8 C (64.0 F)	39 of 100 (Notable)
Campo Alegre	Brazil	Record daily precipitation	50.8 mm (2.0 in)	38 of 100 (Notable)
Mineiros Do Tiete (Cpef)	Brazil	Record daily precipitation	50.4 mm (2.0 in)	38 of 100 (Notable)
Pettibone	United States	Record daily precipitation	25.4 mm (1.0 in)	38 of 100 (Notable)
Cooper	United States	Record daily precipitation	74.2 mm (2.9 in)	38 of 100 (Notable)
Kirbyville	United States	Record daily precipitation	81.0 mm (3.2 in)	38 of 100 (Notable)
Saltair Salt Plt	United States	Record daily precipitation	38.6 mm (1.5 in)	38 of 100 (Notable)
Ribeirao Bonito	Brazil	Record daily precipitation	38.0 mm (1.5 in)	37 of 100 (Notable)
Hoxie	United States	Record high minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Hallock	United States	Record high minimum temperature	15.0 C (59.0 F)	37 of 100 (Notable)
Charlotteburg Rsvr	United States	Record high minimum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Lake Mills Wwtp	United States	Record high maximum temperature	30.6 C (87.1 F)	37 of 100 (Notable)
S Bend AP	United States	Record high maximum temperature	32.2 C (90.0 F)	37 of 100 (Notable)
Coronel Macedo	Brazil	Record daily precipitation	59.1 mm (2.3 in)	36 of 100 (Notable)

Counts by Type and Timescale

1,179 records

Records set or tied on 15 May 1991 by type: Highest daily maximum 312, Lowest daily maximum 115, Highest daily minimum 264, Lowest daily minimum 54, Heaviest daily rainfall 428, Heaviest daily snowfall 5, Deepest snow cover 1.

Records on 15 May 1991 by type
Record type	Records
Highest daily maximum	312
Lowest daily maximum	115
Highest daily minimum	264
Lowest daily minimum	54
Heaviest daily rainfall	428
Heaviest daily snowfall	5
Deepest snow cover	1

Records on 15 May 1991 by timescale: all-time 2, monthly 27, daily 1,150.

How Much Records Were Beaten By

920 broken records

Margins by which the 920 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 105.9. Ties are not counted.

Top 20 by Significance

15 May 1991

Top 20 records on 15 May 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1991	Moorefield 1 SSE, US	daily rain	60.5 mm (2.4 in)	33.6 mm (1.3 in)	92 years	71 of 100 (Major)
15 May 1991	Rimini 2 SSW, US	daily rain	98.3 mm (3.9 in)	70.4 mm (2.8 in)	68 years	67 of 100 (Major)
15 May 1991	Fairfield, US	monthly rain	50.8 mm (2.0 in)	20.8 mm (0.8 in)	15 years	62 of 100 (Major)
15 May 1991	Douglas Caa AP, US	monthly rain	81.3 mm (3.2 in)	41.7 mm (1.6 in)	20 years	60 of 100 (Major)
15 May 1991	La Moure, US	monthly rain	91.4 mm (3.6 in)	39.3 mm (1.5 in)	19 years	59 of 100 (Notable)
15 May 1991	Scottsbluff W B Heilig Fld AP, US	daily rain	40.6 mm (1.6 in)	27.9 mm (1.1 in)	62 years	58 of 100 (Notable)
15 May 1991	Muddy Gap, US	all-time rain	68.6 mm (2.7 in)	16.0 mm (0.6 in)	33 years	56 of 100 (Notable)
15 May 1991	Palmyra, US	daily rain	87.4 mm (3.4 in)	53.9 mm (2.1 in)	14 years	53 of 100 (Notable)
15 May 1991	Hague, US	daily rain	53.3 mm (2.1 in)	39.1 mm (1.5 in)	28 years	52 of 100 (Notable)
15 May 1991	Club Crocodile Resort, AU	daily rain	146.0 mm (5.7 in)	105.9 mm (4.2 in)	21 years	51 of 100 (Notable)
15 May 1991	Tlaxco, MX	daily rain	59.2 mm (2.3 in)	39.1 mm (1.5 in)	25 years	51 of 100 (Notable)
15 May 1991	Represa Bariri, BR	daily rain	70.8 mm (2.8 in)	48.9 mm (1.9 in)	25 years	50 of 100 (Notable)
15 May 1991	Lyman, US	daily rain	58.4 mm (2.3 in)	35.5 mm (1.4 in)	30 years	50 of 100 (Notable)
15 May 1991	Verona, US	daily rain	65.3 mm (2.6 in)	34.6 mm (1.4 in)	28 years	50 of 100 (Notable)
15 May 1991	Leola, US	daily rain	39.9 mm (1.6 in)	16.0 mm (0.6 in)	89 years	50 of 100 (Notable)
15 May 1991	Yornup, AU	daily rain	49.6 mm (2.0 in)	28.8 mm (1.1 in)	34 years	48 of 100 (Notable)
15 May 1991	Bauru (Pdv), BR	daily rain	54.1 mm (2.1 in)	44.6 mm (1.8 in)	30 years	48 of 100 (Notable)
15 May 1991	Harnosand, SE	daily rain	33.0 mm (1.3 in)	4.6 mm (0.18 in)	104 years	47 of 100 (Notable)
15 May 1991	Napoleon, US	daily rain	41.9 mm (1.6 in)	14.0 mm (0.6 in)	74 years	47 of 100 (Notable)
15 May 1991	Pirassununga, BR	monthly rain	80.0 mm (3.1 in)	21.0 mm (0.8 in)	32 years	46 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

1820 to 1991

Records set or tied on this calendar date in each year from 1820 to 1991. 1991 had 1,179 records.

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

Records on 05-15 in each year
Year	Records
1820	1
1825	1
1831	1
1832	1
1837	2
1845	1
1847	2
1848	1
1855	2
1857	2
1859	1
1862	1
1863	1
1865	1
1866	2
1867	1
1868	2
1870	1
1871	3
1874	2
1876	4
1878	1
1879	2
1881	1
1883	1
1885	1
1886	2
1888	3
1891	3
1893	5
1894	2
1895	4
1896	2
1897	4
1898	3
1899	9
1900	9
1901	2
1902	9
1903	4
1904	13
1905	16
1906	10
1907	27
1908	25
1909	89
1910	27
1911	27
1912	26
1913	60
1914	16
1915	236
1916	27
1917	80
1918	133
1919	25
1920	58
1921	92
1922	30
1923	125
1924	174
1925	100
1926	161
1927	191
1928	144
1929	161
1930	136
1931	459
1932	368
1933	439
1934	227
1935	288
1936	372
1937	373
1938	393
1939	351
1940	179
1941	454
1942	701
1943	568
1944	630
1945	588
1946	238
1947	334
1948	264
1949	363
1950	260
1951	736
1952	476
1953	426
1954	355
1955	538
1956	466
1957	521
1958	605
1959	764
1960	291
1961	508
1962	1,128
1963	782
1964	347
1965	320
1966	389
1967	609
1968	1,019
1969	790
1970	512
1971	351
1972	484
1973	818
1974	1,230
1975	372
1976	803
1977	1,186
1978	922
1979	404
1980	625
1981	586
1982	500
1983	1,215
1984	1,059
1985	649
1986	679
1987	1,073
1988	643
1989	552
1990	776
1991	1,179
1992	944
1993	784
1994	910
1995	1,750
1996	1,452
1997	1,175
1998	1,641
1999	810
2000	850
2001	1,280
2002	801
2003	1,023
2004	1,046
2005	767
2006	955
2007	949
2008	995
2009	675
2010	1,088
2011	1,298
2012	751
2013	1,081
2014	1,411
2015	717
2016	890
2017	435
2018	1,074
2019	627
2020	472
2021	412
2022	847
2023	566
2024	596
2025	801
2026	481

Download the Data

Data for records on 1991-05-15: 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	58
40 to 60	15
60 to 80	3
80 to 100	0
100 to 120	1