Weather Records on 31 May 1991

1,381 weather records were set or tied worldwide on 31 May 1991. Highest significance: Monroeville 1 NW, US.

Key Facts for 31 May 1991

On 31 May 1991, 1,381 weather records were set or tied at long-record stations worldwide.
935 were record highs and 200 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 194 monthly and 1,186 daily.
Monroeville 1 NW set an all-time record daily precipitation of 125.7 mm (4.9 in) on 31 May 1991.
Across 161 earlier years (1811 to 2026) the same calendar date averaged 432 records.

Record Map

1,381 stations

1,381 station records on 31 May 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 May 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Monroeville 1 NW	United States	Record daily precipitation	125.7 mm (4.9 in)	70 of 100 (Major)
Grand Forks UNIV (NWS)	United States	Record daily precipitation	94.0 mm (3.7 in)	63 of 100 (Major)
Caliente	United States	Record daily precipitation	25.9 mm (1.0 in)	62 of 100 (Major)
Defiance	United States	Record daily precipitation	47.0 mm (1.9 in)	62 of 100 (Major)
Cedar Rapids #1	United States	Record daily precipitation	54.4 mm (2.1 in)	61 of 100 (Major)
Duchesne	United States	Record daily precipitation	32.8 mm (1.3 in)	60 of 100 (Major)
Kanosh	United States	Record daily precipitation	26.2 mm (1.0 in)	59 of 100 (Notable)
Ai-Petri	Ukraine	Record daily precipitation	45.0 mm (1.8 in)	55 of 100 (Notable)
Ersov	Russia	Record daily precipitation	29.5 mm (1.2 in)	54 of 100 (Notable)
Weyerhaeuser 1N	United States	Record daily precipitation	76.2 mm (3.0 in)	54 of 100 (Notable)
Cook	Australia	Record daily precipitation	41.0 mm (1.6 in)	52 of 100 (Notable)
Ashburn 3 ENE	United States	Record daily precipitation	67.3 mm (2.6 in)	52 of 100 (Notable)
Decatur 1 N	United States	Record daily precipitation	77.7 mm (3.1 in)	51 of 100 (Notable)
Green River Aviation	United States	Record daily precipitation	29.2 mm (1.1 in)	51 of 100 (Notable)
Wah Wah Rch	United States	Record daily precipitation	33.0 mm (1.3 in)	51 of 100 (Notable)
Eucla	Australia	Record daily precipitation	54.8 mm (2.2 in)	50 of 100 (Notable)
Forrest Aero	Australia	Record daily precipitation	27.6 mm (1.1 in)	50 of 100 (Notable)
York 3 SSW Pump STN	United States	Record high minimum temperature	25.0 C (77.0 F)	50 of 100 (Notable)
Cuyamaca	United States	Record low minimum temperature	-6.7 C (19.9 F)	49 of 100 (Notable)
Balashov	Russia	Record daily precipitation	51.5 mm (2.0 in)	48 of 100 (Notable)
El-Ton	Russia	Record daily precipitation	28.2 mm (1.1 in)	48 of 100 (Notable)
Washington 2 ESE	United States	Record high minimum temperature	23.9 C (75.0 F)	48 of 100 (Notable)
Frederick Police Brks	United States	Record high minimum temperature	23.3 C (73.9 F)	48 of 100 (Notable)
Susquehanna	United States	Record daily precipitation	53.1 mm (2.1 in)	48 of 100 (Notable)
San Luis San Pedro	Mexico	Record high maximum temperature	40.6 C (105.1 F)	47 of 100 (Notable)
Leo 6 SW	United States	Record daily precipitation	35.1 mm (1.4 in)	47 of 100 (Notable)
Ignacio Lopez Rayon	Mexico	Record low minimum temperature	17.8 C (64.0 F)	46 of 100 (Notable)
Taganrog (Lighthouse)	Russia	Record daily precipitation	37.5 mm (1.5 in)	46 of 100 (Notable)
Hansboro 4 NNE	United States	Record daily precipitation	49.5 mm (1.9 in)	46 of 100 (Notable)
Van Wert 1 S	United States	Record daily precipitation	63.5 mm (2.5 in)	46 of 100 (Notable)
Modena	United States	Record daily precipitation	31.8 mm (1.3 in)	46 of 100 (Notable)
Yanchi	China	Record daily precipitation	28.3 mm (1.1 in)	45 of 100 (Notable)
Kirsanov	Russia	Record daily precipitation	34.2 mm (1.3 in)	45 of 100 (Notable)
Danilovka	Russia	Record daily precipitation	31.7 mm (1.2 in)	45 of 100 (Notable)
Superior	United States	Record high minimum temperature	21.7 C (71.1 F)	45 of 100 (Notable)
St George	United States	Record low maximum temperature	17.2 C (63.0 F)	45 of 100 (Notable)
Charlottesville 2W	United States	Record high minimum temperature	24.4 C (75.9 F)	45 of 100 (Notable)
College Park	United States	Record high minimum temperature	24.4 C (75.9 F)	44 of 100 (Notable)
Hemlock	United States	Record high minimum temperature	23.9 C (75.0 F)	44 of 100 (Notable)
Purcellville	United States	Record high minimum temperature	23.3 C (73.9 F)	44 of 100 (Notable)
Zamboanga	Philippines	Record daily precipitation	64.0 mm (2.5 in)	43 of 100 (Notable)
Beloit	United States	Record high minimum temperature	22.2 C (72.0 F)	43 of 100 (Notable)
College Park	United States	Record high maximum temperature	37.8 C (100.0 F)	43 of 100 (Notable)
Northville	United States	Record daily precipitation	34.3 mm (1.4 in)	42 of 100 (Notable)
Jacksonville	United States	Record daily precipitation	85.9 mm (3.4 in)	42 of 100 (Notable)
Brawley 2 SW	United States	Record low minimum temperature	6.1 C (43.0 F)	41 of 100 (Notable)
Arcade	United States	Record high minimum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Surin	Thailand	Record daily precipitation	66.0 mm (2.6 in)	40 of 100 (Notable)
Laurel 3 W	United States	Record high maximum temperature	35.6 C (96.1 F)	40 of 100 (Notable)
Paulding	United States	Record daily precipitation	52.3 mm (2.1 in)	40 of 100 (Notable)
Dilley	United States	Record high minimum temperature	26.1 C (79.0 F)	40 of 100 (Notable)
Tucson WFO	United States	Record low maximum temperature	24.4 C (75.9 F)	39 of 100 (Notable)
Holly	United States	Record high maximum temperature	40.6 C (105.1 F)	39 of 100 (Notable)
Dover	United States	Record high maximum temperature	36.1 C (97.0 F)	39 of 100 (Notable)
Emmetsburg	United States	Record high minimum temperature	17.8 C (64.0 F)	39 of 100 (Notable)
Chestertown	United States	Record high minimum temperature	22.2 C (72.0 F)	39 of 100 (Notable)
Princess Anne	United States	Record high minimum temperature	23.3 C (73.9 F)	39 of 100 (Notable)
Ithaca Cornell UNIV	United States	Record high minimum temperature	19.4 C (66.9 F)	39 of 100 (Notable)
Dale Enterprise	United States	Record high maximum temperature	35.6 C (96.1 F)	39 of 100 (Notable)
Griffiss AFB	United States	Record high minimum temperature	19.4 C (66.9 F)	39 of 100 (Notable)

Counts by Type and Timescale

1,381 records

Records set or tied on 31 May 1991 by type: Highest daily maximum 244, Lowest daily maximum 116, Highest daily minimum 691, Lowest daily minimum 84, Heaviest daily rainfall 238, Heaviest daily snowfall 7, Deepest snow cover 1.

Records on 31 May 1991 by type
Record type	Records
Highest daily maximum	244
Lowest daily maximum	116
Highest daily minimum	691
Lowest daily minimum	84
Heaviest daily rainfall	238
Heaviest daily snowfall	7
Deepest snow cover	1

Records on 31 May 1991 by timescale: all-time 1, monthly 194, daily 1,186.

How Much Records Were Beaten By

964 broken records

Margins by which the 964 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 60.7. Ties are not counted.

Top 20 by Significance

31 May 1991

Top 20 records on 31 May 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 May 1991	Monroeville 1 NW, US	all-time rain	125.7 mm (4.9 in)	31.7 mm (1.2 in)	47 years	70 of 100 (Major)
31 May 1991	Grand Forks UNIV (NWS), US	monthly rain	94.0 mm (3.7 in)	14.5 mm (0.6 in)	95 years	63 of 100 (Major)
31 May 1991	Caliente, US	daily rain	25.9 mm (1.0 in)	19.5 mm (0.8 in)	52 years	62 of 100 (Major)
31 May 1991	Defiance, US	daily rain	47.0 mm (1.9 in)	25.4 mm (1.0 in)	86 years	62 of 100 (Major)
31 May 1991	Cedar Rapids #1, US	daily rain	54.4 mm (2.1 in)	32.6 mm (1.3 in)	73 years	61 of 100 (Major)
31 May 1991	Duchesne, US	daily rain	32.8 mm (1.3 in)	16.3 mm (0.6 in)	54 years	60 of 100 (Major)
31 May 1991	Kanosh, US	daily rain	26.2 mm (1.0 in)	20.6 mm (0.8 in)	82 years	59 of 100 (Notable)
31 May 1991	Ai-Petri, UA	daily rain	45.0 mm (1.8 in)	18.1 mm (0.7 in)	84 years	55 of 100 (Notable)
31 May 1991	Ersov, RU	daily rain	29.5 mm (1.2 in)	24.7 mm (1.0 in)	32 years	54 of 100 (Notable)
31 May 1991	Weyerhaeuser 1N, US	daily rain	76.2 mm (3.0 in)	22.1 mm (0.9 in)	81 years	54 of 100 (Notable)
31 May 1991	Cook, AU	monthly rain	41.0 mm (1.6 in)	13.0 mm (0.5 in)	11 years	52 of 100 (Notable)
31 May 1991	Ashburn 3 ENE, US	daily rain	67.3 mm (2.6 in)	60.7 mm (2.4 in)	32 years	52 of 100 (Notable)
31 May 1991	Decatur 1 N, US	daily rain	77.7 mm (3.1 in)	46.7 mm (1.8 in)	18 years	51 of 100 (Notable)
31 May 1991	Green River Aviation, US	daily rain	29.2 mm (1.1 in)	24.1 mm (0.9 in)	24 years	51 of 100 (Notable)
31 May 1991	Wah Wah Rch, US	daily rain	33.0 mm (1.3 in)	21.1 mm (0.8 in)	28 years	51 of 100 (Notable)
31 May 1991	Eucla, AU	daily rain	54.8 mm (2.2 in)	44.2 mm (1.7 in)	1 year	50 of 100 (Notable)
31 May 1991	Forrest Aero, AU	daily rain	27.6 mm (1.1 in)	18.4 mm (0.7 in)	16 years	50 of 100 (Notable)
31 May 1991	York 3 SSW Pump STN, US	monthly high min	25.0 C (77.0 F)	2.8 C (5.0 F)	89 years	50 of 100 (Notable)
31 May 1991	Cuyamaca, US	monthly low min	-6.7 C (19.9 F)	1.1 C (2.0 F)	92 years	49 of 100 (Notable)
31 May 1991	Balashov, RU	monthly rain	51.5 mm (2.0 in)	13.8 mm (0.5 in)	27 years	48 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

1811 to 1991

Records set or tied on this calendar date in each year from 1811 to 1991. 1991 had 1,381 records.

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

Records on 05-31 in each year
Year	Records
1811	1
1818	3
1827	1
1836	2
1845	1
1847	1
1853	2
1855	2
1858	1
1864	2
1865	1
1866	1
1867	1
1868	4
1869	1
1871	2
1873	3
1874	1
1877	1
1878	2
1879	2
1880	3
1882	1
1883	1
1885	1
1888	1
1889	2
1890	1
1892	1
1893	4
1894	2
1895	8
1897	5
1898	7
1899	1
1900	2
1901	9
1902	9
1903	17
1904	19
1905	7
1906	11
1907	20
1908	12
1909	8
1910	26
1911	20
1912	15
1913	83
1914	20
1915	23
1916	23
1917	13
1918	20
1919	44
1920	46
1921	157
1922	49
1923	98
1924	152
1925	226
1926	228
1927	121
1928	67
1929	246
1930	612
1931	223
1932	181
1933	397
1934	782
1935	156
1936	559
1937	462
1938	424
1939	461
1940	383
1941	410
1942	364
1943	552
1944	372
1945	457
1946	380
1947	439
1948	295
1949	303
1950	467
1951	640
1952	374
1953	654
1954	445
1955	534
1956	632
1957	304
1958	429
1959	459
1960	247
1961	472
1962	565
1963	354
1964	1,237
1965	494
1966	601
1967	987
1968	276
1969	555
1970	573
1971	714
1972	1,127
1973	418
1974	473
1975	797
1976	435
1977	605
1978	873
1979	915
1980	517
1981	775
1982	817
1983	1,494
1984	2,047
1985	790
1986	1,365
1987	822
1988	1,255
1989	912
1990	900
1991	1,381
1992	1,031
1993	982
1994	776
1995	693
1996	946
1997	1,163
1998	1,215
1999	790
2000	1,172
2001	1,047
2002	1,162
2003	831
2004	1,071
2005	724
2006	1,045
2007	793
2008	809
2009	570
2010	741
2011	1,498
2012	764
2013	1,100
2014	565
2015	704
2016	402
2017	440
2018	1,211
2019	420
2020	673
2021	834
2022	902
2023	454
2024	809
2025	1,204
2026	536

Download the Data

Data for records on 1991-05-31: 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 10	887
10 to 20	45
20 to 30	21
30 to 40	5
40 to 50	4
50 to 60	1
60 to 70	1