Weather Records on 31 May 1984

2,047 weather records were set or tied worldwide on 31 May 1984. Highest significance: Norfolk 2 SW, US.

Key Facts for 31 May 1984

On 31 May 1984, 2,047 weather records were set or tied at long-record stations worldwide.
446 were record highs and 1,323 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 86 monthly and 1,960 daily.
Norfolk 2 SW set a daily record precipitation of 63.5 mm (2.5 in) on 31 May 1984.
Across 161 earlier years (1811 to 2026) the same calendar date averaged 428 records.

Record Map

2,000 stations, highest significance shown

2,000 station records on 31 May 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 May 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Norfolk 2 SW	United States	Record daily precipitation	63.5 mm (2.5 in)	79 of 100 (Major)
Peru	United States	Record daily precipitation	189.2 mm (7.4 in)	74 of 100 (Major)
Haverhill	United States	Record daily precipitation	88.9 mm (3.5 in)	70 of 100 (Major)
Bethlehem	United States	Record daily precipitation	47.8 mm (1.9 in)	64 of 100 (Major)
Block Island State AP	United States	Record daily precipitation	93.2 mm (3.7 in)	61 of 100 (Major)
Middleton	United States	Record daily precipitation	83.6 mm (3.3 in)	59 of 100 (Notable)
Shepetivka	Ukraine	Record daily precipitation	32.0 mm (1.3 in)	58 of 100 (Notable)
Ust-Kara	Russia	Record daily precipitation	41.9 mm (1.6 in)	57 of 100 (Notable)
Taunton	United States	Record daily precipitation	139.4 mm (5.5 in)	57 of 100 (Notable)
Boston	United States	Record daily precipitation	104.6 mm (4.1 in)	57 of 100 (Notable)
Cuero	United States	Record low minimum temperature	6.7 C (44.1 F)	55 of 100 (Notable)
Groton	United States	Record daily precipitation	60.7 mm (2.4 in)	52 of 100 (Notable)
Morehead City 2 WNW	United States	Record daily precipitation	96.0 mm (3.8 in)	52 of 100 (Notable)
South Weymouth NAS	United States	Record daily precipitation	73.2 mm (2.9 in)	52 of 100 (Notable)
Burlington	United States	Record daily precipitation	51.1 mm (2.0 in)	51 of 100 (Notable)
Hanover	United States	Record daily precipitation	75.2 mm (3.0 in)	51 of 100 (Notable)
New Braunfels	United States	Record low minimum temperature	7.8 C (46.0 F)	51 of 100 (Notable)
Providence	United States	Record daily precipitation	130.8 mm (5.1 in)	50 of 100 (Notable)
Berlin	United States	Record daily precipitation	35.6 mm (1.4 in)	49 of 100 (Notable)
Portland Jetport	United States	Record daily precipitation	80.3 mm (3.2 in)	49 of 100 (Notable)
Gorbica	Russia	Record daily precipitation	34.9 mm (1.4 in)	48 of 100 (Notable)
New Salem	United States	Record daily precipitation	54.9 mm (2.2 in)	48 of 100 (Notable)
Marshall	United States	Record low minimum temperature	7.2 C (45.0 F)	48 of 100 (Notable)
Genthin	Germany	Record daily precipitation	35.5 mm (1.4 in)	47 of 100 (Notable)
Tucson Camp Ave Exp	United States	Record high minimum temperature	22.8 C (73.0 F)	47 of 100 (Notable)
Barkhamsted	United States	Record daily precipitation	63.5 mm (2.5 in)	47 of 100 (Notable)
Bulls Brg Dam	United States	Record daily precipitation	62.5 mm (2.5 in)	47 of 100 (Notable)
Wigwam Rsvr	United States	Record daily precipitation	58.4 mm (2.3 in)	47 of 100 (Notable)
Saffle	Sweden	Record daily precipitation	34.7 mm (1.4 in)	46 of 100 (Notable)
Pine Bluff	United States	Record low minimum temperature	4.4 C (39.9 F)	46 of 100 (Notable)
Cockaponset Rs	United States	Record daily precipitation	67.8 mm (2.7 in)	46 of 100 (Notable)
Evergreen	United States	Record low minimum temperature	7.2 C (45.0 F)	45 of 100 (Notable)
Greensboro	United States	Record low minimum temperature	5.0 C (41.0 F)	45 of 100 (Notable)
Shepaug Dam	United States	Record daily precipitation	54.6 mm (2.1 in)	45 of 100 (Notable)
Cuthbert	United States	Record low minimum temperature	7.8 C (46.0 F)	45 of 100 (Notable)
Knightville Dam	United States	Record daily precipitation	57.7 mm (2.3 in)	45 of 100 (Notable)
Pelham	United States	Record daily precipitation	69.1 mm (2.7 in)	45 of 100 (Notable)
Toms River	United States	Record daily precipitation	83.6 mm (3.3 in)	45 of 100 (Notable)
Monticello Muni AP	United States	Record low minimum temperature	5.0 C (41.0 F)	45 of 100 (Notable)
Minden	United States	Record low minimum temperature	7.8 C (46.0 F)	44 of 100 (Notable)
Mansfield	United States	Record daily precipitation	67.1 mm (2.6 in)	44 of 100 (Notable)
Kingston	United States	Record daily precipitation	107.7 mm (4.2 in)	44 of 100 (Notable)
Greeneville Exp STN	United States	Record low maximum temperature	13.9 C (57.0 F)	44 of 100 (Notable)
Chelsea	United States	Record daily precipitation	34.3 mm (1.4 in)	44 of 100 (Notable)
South Newbury	United States	Record daily precipitation	42.9 mm (1.7 in)	44 of 100 (Notable)
Yellowstone Park Mammoth	United States	Record high minimum temperature	11.1 C (52.0 F)	44 of 100 (Notable)
Brownsville	United States	Record low minimum temperature	13.3 C (55.9 F)	44 of 100 (Notable)
Monticello Muni AP	United States	Record low maximum temperature	21.1 C (70.0 F)	44 of 100 (Notable)
Syuryun-Kyuyel	Russia	Record daily precipitation	33.1 mm (1.3 in)	43 of 100 (Notable)
Tully Lake	United States	Record daily precipitation	61.0 mm (2.4 in)	43 of 100 (Notable)
Pascagoula 3 NE	United States	Record low maximum temperature	22.2 C (72.0 F)	43 of 100 (Notable)
Surry Mtn Lake	United States	Record daily precipitation	54.1 mm (2.1 in)	43 of 100 (Notable)
Madison 3NNW	United States	Record low maximum temperature	12.2 C (54.0 F)	43 of 100 (Notable)
Karesuando	Sweden	Record high minimum temperature	11.0 C (51.8 F)	42 of 100 (Notable)
Stevenson Dam	United States	Record daily precipitation	55.1 mm (2.2 in)	42 of 100 (Notable)
Belhaven 1 SE	United States	Record daily precipitation	85.6 mm (3.4 in)	42 of 100 (Notable)
Crockett	United States	Record low minimum temperature	10.0 C (50.0 F)	42 of 100 (Notable)
Salisbury 2 N	United States	Record daily precipitation	63.5 mm (2.5 in)	42 of 100 (Notable)
Motozintla (Smn)	Mexico	Record low maximum temperature	18.9 C (66.0 F)	41 of 100 (Notable)
Hawkinsville	United States	Record low minimum temperature	5.6 C (42.1 F)	41 of 100 (Notable)

Counts by Type and Timescale

2,047 records

Records set or tied on 31 May 1984 by type: Highest daily maximum 202, Lowest daily maximum 529, Highest daily minimum 244, Lowest daily minimum 794, Heaviest daily rainfall 275, Heaviest daily snowfall 2, Deepest snow cover 1.

Records on 31 May 1984 by type
Record type	Records
Highest daily maximum	202
Lowest daily maximum	529
Highest daily minimum	244
Lowest daily minimum	794
Heaviest daily rainfall	275
Heaviest daily snowfall	2
Deepest snow cover	1

Records on 31 May 1984 by timescale: all-time 1, monthly 86, daily 1,960.

How Much Records Were Beaten By

1,677 broken records

Margins by which the 1,677 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 153.0. Ties are not counted.

Top 20 by Significance

31 May 1984

Top 20 records on 31 May 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 May 1984	Norfolk 2 SW, US	daily rain	63.5 mm (2.5 in)	52.6 mm (2.1 in)	98 years	79 of 100 (Major)
31 May 1984	Peru, US	all-time rain	189.2 mm (7.4 in)	81.2 mm (3.2 in)	35 years	74 of 100 (Major)
31 May 1984	Haverhill, US	daily rain	88.9 mm (3.5 in)	61.7 mm (2.4 in)	76 years	70 of 100 (Major)
31 May 1984	Bethlehem, US	daily rain	47.8 mm (1.9 in)	27.2 mm (1.1 in)	76 years	64 of 100 (Major)
31 May 1984	Block Island State AP, US	monthly rain	93.2 mm (3.7 in)	40.6 mm (1.6 in)	23 years	61 of 100 (Major)
31 May 1984	Middleton, US	daily rain	83.6 mm (3.3 in)	45.2 mm (1.8 in)	44 years	59 of 100 (Notable)
31 May 1984	Shepetivka, UA	daily rain	32.0 mm (1.3 in)	24.5 mm (1.0 in)	46 years	58 of 100 (Notable)
31 May 1984	Ust-Kara, RU	monthly rain	41.9 mm (1.6 in)	13.1 mm (0.5 in)	45 years	57 of 100 (Notable)
31 May 1984	Taunton, US	monthly rain	139.4 mm (5.5 in)	41.9 mm (1.6 in)	17 years	57 of 100 (Notable)
31 May 1984	Boston, US	daily rain	104.6 mm (4.1 in)	70.8 mm (2.8 in)	44 years	57 of 100 (Notable)
31 May 1984	Cuero, US	daily low min	6.7 C (44.1 F)	8.9 C (16.0 F)	77 years	55 of 100 (Notable)
31 May 1984	Groton, US	daily rain	60.7 mm (2.4 in)	47.5 mm (1.9 in)	32 years	52 of 100 (Notable)
31 May 1984	Morehead City 2 WNW, US	daily rain	96.0 mm (3.8 in)	80.3 mm (3.2 in)	32 years	52 of 100 (Notable)
31 May 1984	South Weymouth NAS, US	daily rain	73.2 mm (2.9 in)	57.7 mm (2.3 in)	28 years	52 of 100 (Notable)
31 May 1984	Burlington, US	daily rain	51.1 mm (2.0 in)	39.9 mm (1.6 in)	24 years	51 of 100 (Notable)
31 May 1984	Hanover, US	monthly rain	75.2 mm (3.0 in)	4.8 mm (0.19 in)	87 years	51 of 100 (Notable)
31 May 1984	New Braunfels, US	daily low min	7.8 C (46.0 F)	6.6 C (11.9 F)	81 years	51 of 100 (Notable)
31 May 1984	Providence, US	monthly rain	130.8 mm (5.1 in)	36.1 mm (1.4 in)	17 years	50 of 100 (Notable)
31 May 1984	Berlin, US	daily rain	35.6 mm (1.4 in)	9.2 mm (0.36 in)	92 years	49 of 100 (Notable)
31 May 1984	Iema, RU	monthly rain	23.2 mm (0.9 in)	10.8 mm (0.4 in)	7 years	20 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

1811 to 1984

Records set or tied on this calendar date in each year from 1811 to 1984. 1984 had 2,047 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 1984-05-31: 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 20	1,613
20 to 40	43
40 to 60	15
60 to 80	2
80 to 100	3
100 to 120	0
120 to 140	0
140 to 160	1