Weather Records on 20 May 1991

925 weather records were set or tied worldwide on 20 May 1991. Highest significance: Rogersville 1 NE, US.

Key Facts for 20 May 1991

On 20 May 1991, 925 weather records were set or tied at long-record stations worldwide.
353 were record highs and 267 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 21 monthly and 903 daily.
Rogersville 1 NE set a daily record precipitation of 62.2 mm (2.4 in) on 20 May 1991.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 453 records.

Record Map

925 stations

925 station records on 20 May 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rogersville 1 NE	United States	Record daily precipitation	62.2 mm (2.4 in)	69 of 100 (Major)
Amistad 5 SSW	United States	Record daily precipitation	71.1 mm (2.8 in)	63 of 100 (Major)
Apalachicola AP	United States	Record daily precipitation	172.7 mm (6.8 in)	62 of 100 (Major)
Ft Assiniboine	United States	Record daily precipitation	46.0 mm (1.8 in)	58 of 100 (Notable)
Monticello 3 NE	United States	Record daily precipitation	74.4 mm (2.9 in)	56 of 100 (Notable)
Pine Ridge (Windy)	Australia	Record daily precipitation	50.0 mm (2.0 in)	54 of 100 (Notable)
Madisonville	United States	Record daily precipitation	86.4 mm (3.4 in)	54 of 100 (Notable)
Valsugana Velha-Montante	Brazil	Record daily precipitation	71.6 mm (2.8 in)	53 of 100 (Notable)
Key West NAS	United States	Record daily precipitation	130.6 mm (5.1 in)	53 of 100 (Notable)
Darganata	Uzbekistan	Record daily precipitation	27.8 mm (1.1 in)	53 of 100 (Notable)
Barra de Sao Francisco	Brazil	Record daily precipitation	40.0 mm (1.6 in)	52 of 100 (Notable)
Iconha-Montante	Brazil	Record daily precipitation	75.0 mm (3.0 in)	52 of 100 (Notable)
Fundao	Brazil	Record daily precipitation	61.2 mm (2.4 in)	51 of 100 (Notable)
Segen-Kyuel	Russia	Record daily precipitation	29.8 mm (1.2 in)	49 of 100 (Notable)
Tottenham Post Office	Australia	Record daily precipitation	39.0 mm (1.5 in)	47 of 100 (Notable)
Premer (Eden Moor)	Australia	Record daily precipitation	53.0 mm (2.1 in)	47 of 100 (Notable)
Shelby 2 NW	United States	Record low maximum temperature	12.8 C (55.0 F)	47 of 100 (Notable)
Santuck	United States	Record low maximum temperature	15.0 C (59.0 F)	47 of 100 (Notable)
Samarkand	Uzbekistan	Record daily precipitation	27.8 mm (1.1 in)	47 of 100 (Notable)
Cavalinho	Brazil	Record daily precipitation	48.2 mm (1.9 in)	46 of 100 (Notable)
Tarpon Spgs Sewage Plt	United States	Record daily precipitation	78.0 mm (3.1 in)	45 of 100 (Notable)
Mt Vernon	United States	Record daily precipitation	76.7 mm (3.0 in)	45 of 100 (Notable)
Stillwater 2 W	United States	Record daily precipitation	55.4 mm (2.2 in)	45 of 100 (Notable)
Club Crocodile Resort	Australia	Record daily precipitation	122.0 mm (4.8 in)	44 of 100 (Notable)
Dandaloo (Skye)	Australia	Record daily precipitation	42.0 mm (1.7 in)	43 of 100 (Notable)
Nyngan (Canonbar)	Australia	Record daily precipitation	49.0 mm (1.9 in)	43 of 100 (Notable)
Lisboa Geofisica	Portugal	Record high minimum temperature	20.0 C (68.0 F)	43 of 100 (Notable)
Toms River	United States	Record low minimum temperature	1.7 C (35.1 F)	43 of 100 (Notable)
Durham	United Kingdom	Record high minimum temperature	11.5 C (52.7 F)	41 of 100 (Notable)
Dillon	United States	Record low maximum temperature	16.1 C (61.0 F)	41 of 100 (Notable)
Blagovescensk	Russia	Record high minimum temperature	17.4 C (63.3 F)	40 of 100 (Notable)
Marion 4 NNE	United States	Record daily precipitation	57.2 mm (2.3 in)	40 of 100 (Notable)
Shawneetown Old Town	United States	Record daily precipitation	61.5 mm (2.4 in)	40 of 100 (Notable)
Statesville 2 NNE	United States	Record low maximum temperature	13.3 C (55.9 F)	40 of 100 (Notable)
Pine Ridge (Billabong)	Australia	Record daily precipitation	41.0 mm (1.6 in)	39 of 100 (Notable)
Monroe 2 SE	United States	Record low maximum temperature	15.0 C (59.0 F)	39 of 100 (Notable)
Crossville Ed & Rsch STN	United States	Record daily precipitation	52.6 mm (2.1 in)	39 of 100 (Notable)
Kobeliaky	Ukraine	Record daily precipitation	30.0 mm (1.2 in)	38 of 100 (Notable)
Moorestown 4 E	United States	Record low minimum temperature	2.2 C (36.0 F)	38 of 100 (Notable)
Willard 4 SW	United States	Record low maximum temperature	18.3 C (64.9 F)	38 of 100 (Notable)
Blackville 3 W	United States	Record low maximum temperature	18.9 C (66.0 F)	38 of 100 (Notable)
Hendersonville 1 NE	United States	Record low maximum temperature	13.3 C (55.9 F)	37 of 100 (Notable)
Laurinburg	United States	Record low maximum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Beulah	United States	Record low maximum temperature	11.1 C (52.0 F)	37 of 100 (Notable)
Scottsbluff W B Heilig Fld AP	United States	Record high minimum temperature	15.0 C (59.0 F)	37 of 100 (Notable)
Cachoeira Suica (Dnos)	Brazil	Record daily precipitation	46.0 mm (1.8 in)	36 of 100 (Notable)
San Diego de Alejandria	Mexico	Record high minimum temperature	20.6 C (69.1 F)	36 of 100 (Notable)
Culbertson	United States	Record high minimum temperature	15.0 C (59.0 F)	36 of 100 (Notable)
Little Mtn	United States	Record low maximum temperature	15.0 C (59.0 F)	36 of 100 (Notable)
Oceanside Marina	United States	Record low maximum temperature	15.6 C (60.1 F)	35 of 100 (Notable)
Oneida	United States	Record daily precipitation	60.5 mm (2.4 in)	35 of 100 (Notable)
Hightstown 2 W	United States	Record low minimum temperature	1.7 C (35.1 F)	35 of 100 (Notable)
Dores Do Indaia (Cvsf)	Brazil	Record daily precipitation	39.0 mm (1.5 in)	34 of 100 (Routine)
St Petersburg	United States	Record low maximum temperature	27.2 C (81.0 F)	34 of 100 (Routine)
Cheraw	United States	Record low maximum temperature	16.7 C (62.1 F)	34 of 100 (Routine)
Sao Luiz Do Curu	Brazil	Record daily precipitation	63.2 mm (2.5 in)	33 of 100 (Routine)
Hyden	United States	Record daily precipitation	35.1 mm (1.4 in)	33 of 100 (Routine)
Pemberton	United States	Record low minimum temperature	-0.6 C (30.9 F)	33 of 100 (Routine)
Goonoo Goonoo Station	Australia	Record daily precipitation	28.6 mm (1.1 in)	32 of 100 (Routine)
Pao de Acucar	Brazil	Record daily precipitation	35.2 mm (1.4 in)	32 of 100 (Routine)

Counts by Type and Timescale

925 records

Records set or tied on 20 May 1991 by type: Highest daily maximum 78, Lowest daily maximum 164, Highest daily minimum 275, Lowest daily minimum 103, Heaviest daily rainfall 302, Heaviest daily snowfall 3.

Records on 20 May 1991 by type
Record type	Records
Highest daily maximum	78
Lowest daily maximum	164
Highest daily minimum	275
Lowest daily minimum	103
Heaviest daily rainfall	302
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 20 May 1991 by timescale: all-time 1, monthly 21, daily 903.

How Much Records Were Beaten By

749 broken records

Margins by which the 749 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 115.5. Ties are not counted.

Top 20 by Significance

20 May 1991

Top 20 records on 20 May 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1991	Rogersville 1 NE, US	daily rain	62.2 mm (2.4 in)	30.2 mm (1.2 in)	100 years	69 of 100 (Major)
20 May 1991	Amistad 5 SSW, US	daily rain	71.1 mm (2.8 in)	48.5 mm (1.9 in)	60 years	63 of 100 (Major)
20 May 1991	Apalachicola AP, US	daily rain	172.7 mm (6.8 in)	115.5 mm (4.5 in)	56 years	62 of 100 (Major)
20 May 1991	Ft Assiniboine, US	daily rain	46.0 mm (1.8 in)	29.5 mm (1.2 in)	37 years	58 of 100 (Notable)
20 May 1991	Monticello 3 NE, US	daily rain	74.4 mm (2.9 in)	52.8 mm (2.1 in)	38 years	56 of 100 (Notable)
20 May 1991	Pine Ridge (Windy), AU	daily rain	50.0 mm (2.0 in)	31.2 mm (1.2 in)	58 years	54 of 100 (Notable)
20 May 1991	Madisonville, US	daily rain	86.4 mm (3.4 in)	66.1 mm (2.6 in)	33 years	54 of 100 (Notable)
20 May 1991	Valsugana Velha-Montante, BR	daily rain	71.6 mm (2.8 in)	65.0 mm (2.6 in)	33 years	53 of 100 (Notable)
20 May 1991	Key West NAS, US	daily rain	130.6 mm (5.1 in)	112.3 mm (4.4 in)	32 years	53 of 100 (Notable)
20 May 1991	Darganata, UZ	daily rain	27.8 mm (1.1 in)	26.2 mm (1.0 in)	28 years	53 of 100 (Notable)
20 May 1991	Barra de Sao Francisco, BR	daily rain	40.0 mm (1.6 in)	26.8 mm (1.1 in)	26 years	52 of 100 (Notable)
20 May 1991	Iconha-Montante, BR	daily rain	75.0 mm (3.0 in)	64.0 mm (2.5 in)	26 years	52 of 100 (Notable)
20 May 1991	Fundao, BR	daily rain	61.2 mm (2.4 in)	53.6 mm (2.1 in)	25 years	51 of 100 (Notable)
20 May 1991	Segen-Kyuel, RU	daily rain	29.8 mm (1.2 in)	20.0 mm (0.8 in)	16 years	49 of 100 (Notable)
20 May 1991	Tottenham Post Office, AU	daily rain	39.0 mm (1.5 in)	24.8 mm (1.0 in)	44 years	47 of 100 (Notable)
20 May 1991	Premer (Eden Moor), AU	daily rain	53.0 mm (2.1 in)	27.9 mm (1.1 in)	48 years	47 of 100 (Notable)
20 May 1991	Shelby 2 NW, US	daily low max	12.8 C (55.0 F)	3.9 C (7.0 F)	96 years	47 of 100 (Notable)
20 May 1991	Santuck, US	daily low max	15.0 C (59.0 F)	5.0 C (9.0 F)	89 years	47 of 100 (Notable)
20 May 1991	Samarkand, UZ	daily rain	27.8 mm (1.1 in)	17.7 mm (0.7 in)	48 years	47 of 100 (Notable)
20 May 1991	Cavalinho, BR	daily rain	48.2 mm (1.9 in)	39.0 mm (1.5 in)	9 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

1802 to 1991

Records set or tied on this calendar date in each year from 1802 to 1991. 1991 had 925 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 1991-05-20: 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	707
20 to 40	31
40 to 60	5
60 to 80	3
80 to 100	1
100 to 120	2