Weather Records on 31 May 1966

601 weather records were set or tied worldwide on 31 May 1966. Highest significance: Perumpavur, IN.

Key Facts for 31 May 1966

On 31 May 1966, 601 weather records were set or tied at long-record stations worldwide.
102 were record highs and 369 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 13 monthly and 587 daily.
Perumpavur set a daily record precipitation of 190.5 mm (7.5 in) on 31 May 1966.
Across 161 earlier years (1811 to 2026) the same calendar date averaged 437 records.

Record Map

601 stations

601 station records on 31 May 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 May 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Perumpavur	India	Record daily precipitation	190.5 mm (7.5 in)	52 of 100 (Notable)
Maceio (Aeroporto)	Brazil	Record daily precipitation	174.8 mm (6.9 in)	48 of 100 (Notable)
Mulungu	Brazil	Record daily precipitation	72.2 mm (2.8 in)	46 of 100 (Notable)
Iraucuba	Brazil	Record daily precipitation	38.2 mm (1.5 in)	45 of 100 (Notable)
Lucinda Township	Australia	Record daily precipitation	47.5 mm (1.9 in)	40 of 100 (Notable)
Baturite	Brazil	Record daily precipitation	54.3 mm (2.1 in)	40 of 100 (Notable)
Bikaner	India	Record daily precipitation	35.6 mm (1.4 in)	38 of 100 (Notable)
Olho Dagua	Brazil	Record daily precipitation	50.0 mm (2.0 in)	37 of 100 (Notable)
Malayattur	India	Record daily precipitation	109.2 mm (4.3 in)	35 of 100 (Notable)
Victoria Sugar Mill	Australia	Record daily precipitation	38.9 mm (1.5 in)	34 of 100 (Routine)
Santa Rosalia (Dge)	Mexico	Record high maximum temperature	42.2 C (108.0 F)	34 of 100 (Routine)
Isabela Substn	Puerto Rico [United States]	Record daily precipitation	72.4 mm (2.9 in)	34 of 100 (Routine)
Atalaia	Brazil	Record daily precipitation	91.4 mm (3.6 in)	33 of 100 (Routine)
Seymour 1 WSW	United States	Record low minimum temperature	1.7 C (35.1 F)	33 of 100 (Routine)
Hillsdale	United States	Record low minimum temperature	-1.7 C (28.9 F)	33 of 100 (Routine)
Winnsboro	United States	Record low maximum temperature	18.3 C (64.9 F)	33 of 100 (Routine)
Basin	United States	Record high minimum temperature	16.1 C (61.0 F)	33 of 100 (Routine)
Macknade Sugar Mill	Australia	Record daily precipitation	31.5 mm (1.2 in)	32 of 100 (Routine)
Claresholm Meadow Creek	Canada	Record daily precipitation	26.7 mm (1.1 in)	32 of 100 (Routine)
Toledo Blade	United States	Record low minimum temperature	2.2 C (36.0 F)	32 of 100 (Routine)
Springfield Abraham Lincoln Ca	United States	Record low minimum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Port Stanley	Canada	Record low minimum temperature	1.7 C (35.1 F)	31 of 100 (Routine)
Louisiana Starks Nurse	United States	Record low minimum temperature	2.8 C (37.0 F)	31 of 100 (Routine)
Buffalo	United States	Record high minimum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Quilandi	India	Record daily precipitation	145.0 mm (5.7 in)	30 of 100 (Routine)
Houston	United States	Record low minimum temperature	4.4 C (39.9 F)	30 of 100 (Routine)
Pine River 3 NE	United States	Record low minimum temperature	-1.7 C (28.9 F)	30 of 100 (Routine)
Sheridan Fld STN	United States	Record high minimum temperature	18.9 C (66.0 F)	30 of 100 (Routine)
Traverse Cy Cherry Capital AP	United States	Record low minimum temperature	-2.2 C (28.0 F)	30 of 100 (Routine)
Benson	United States	Record high minimum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Chariton 1 E	United States	Record low minimum temperature	3.3 C (37.9 F)	29 of 100 (Routine)
Newberry-Luce Co Rd Commission	United States	Record low minimum temperature	-2.2 C (28.0 F)	29 of 100 (Routine)
Bolivar 1 NE	United States	Record low minimum temperature	6.7 C (44.1 F)	29 of 100 (Routine)
Lame Deer	United States	Record high minimum temperature	21.7 C (71.1 F)	29 of 100 (Routine)
Vida 6 NE	United States	Record daily precipitation	36.1 mm (1.4 in)	29 of 100 (Routine)
Hancock Exp Farm	United States	Record low minimum temperature	-1.7 C (28.9 F)	29 of 100 (Routine)
Prairie du Sac 2 N	United States	Record low minimum temperature	2.8 C (37.0 F)	29 of 100 (Routine)
Cubbaroo	Australia	Record daily precipitation	27.7 mm (1.1 in)	28 of 100 (Routine)
Aratuba	Brazil	Record daily precipitation	102.3 mm (4.0 in)	28 of 100 (Routine)
Serra Negra Do Norte	Brazil	Record daily precipitation	51.0 mm (2.0 in)	28 of 100 (Routine)
Kurgan	Russia	Record high minimum temperature	17.0 C (62.6 F)	28 of 100 (Routine)
Castle Rock	United States	Record high minimum temperature	13.3 C (55.9 F)	28 of 100 (Routine)
Richmond Wtr Wks	United States	Record low minimum temperature	1.1 C (34.0 F)	28 of 100 (Routine)
Vevay	United States	Record low minimum temperature	3.9 C (39.0 F)	28 of 100 (Routine)
Delaware 3 WSW	United States	Record low minimum temperature	1.7 C (35.1 F)	28 of 100 (Routine)
Grinnell 3 SW	United States	Record low minimum temperature	2.8 C (37.0 F)	28 of 100 (Routine)
Mt Ayr	United States	Record low minimum temperature	4.4 C (39.9 F)	28 of 100 (Routine)
Miles City	United States	Record high minimum temperature	22.2 C (72.0 F)	28 of 100 (Routine)
Portage Wwtp	United States	Record low minimum temperature	-1.1 C (30.0 F)	28 of 100 (Routine)
Wisconsin Rapids	United States	Record low minimum temperature	0.0 C (32.0 F)	28 of 100 (Routine)
Green Rvr	United States	Record high minimum temperature	13.3 C (55.9 F)	28 of 100 (Routine)
Rapelje	United States	Record daily precipitation	35.8 mm (1.4 in)	27 of 100 (Routine)
Casper 2 E	United States	Record high minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Worland	United States	Record high minimum temperature	16.7 C (62.1 F)	27 of 100 (Routine)
Kelvin (Kahana)	Australia	Record daily precipitation	33.0 mm (1.3 in)	26 of 100 (Routine)
Listowel	Canada	Record low maximum temperature	11.7 C (53.1 F)	26 of 100 (Routine)
Whiteriver 1 SW	United States	Record high maximum temperature	35.0 C (95.0 F)	26 of 100 (Routine)
Riggins	United States	Record high maximum temperature	36.7 C (98.1 F)	26 of 100 (Routine)
Busby	United States	Record high minimum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
Jemez Springs	United States	Record high minimum temperature	13.3 C (55.9 F)	26 of 100 (Routine)

Counts by Type and Timescale

601 records

Records set or tied on 31 May 1966 by type: Highest daily maximum 26, Lowest daily maximum 126, Highest daily minimum 76, Lowest daily minimum 243, Heaviest daily rainfall 130.

Records on 31 May 1966 by type
Record type	Records
Highest daily maximum	26
Lowest daily maximum	126
Highest daily minimum	76
Lowest daily minimum	243
Heaviest daily rainfall	130
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 May 1966 by timescale: all-time 1, monthly 13, daily 587.

How Much Records Were Beaten By

435 broken records

Margins by which the 435 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 139.7. Ties are not counted.

Top 20 by Significance

31 May 1966

Top 20 records on 31 May 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 May 1966	Perumpavur, IN	daily rain	190.5 mm (7.5 in)	139.7 mm (5.5 in)	23 years	52 of 100 (Notable)
31 May 1966	Maceio (Aeroporto), BR	daily rain	174.8 mm (6.9 in)	134.7 mm (5.3 in)	12 years	48 of 100 (Notable)
31 May 1966	Mulungu, BR	daily rain	72.2 mm (2.8 in)	43.7 mm (1.7 in)	24 years	46 of 100 (Notable)
31 May 1966	Iraucuba, BR	daily rain	38.2 mm (1.5 in)	29.6 mm (1.2 in)	43 years	45 of 100 (Notable)
31 May 1966	Lucinda Township, AU	daily rain	47.5 mm (1.9 in)	31.0 mm (1.2 in)	56 years	40 of 100 (Notable)
31 May 1966	Baturite, BR	daily rain	54.3 mm (2.1 in)	28.8 mm (1.1 in)	48 years	40 of 100 (Notable)
31 May 1966	Bikaner, IN	daily rain	35.6 mm (1.4 in)	15.5 mm (0.6 in)	49 years	38 of 100 (Notable)
31 May 1966	Olho Dagua, BR	daily rain	50.0 mm (2.0 in)	37.0 mm (1.5 in)	28 years	37 of 100 (Notable)
31 May 1966	Malayattur, IN	daily rain	109.2 mm (4.3 in)	50.8 mm (2.0 in)	32 years	35 of 100 (Notable)
31 May 1966	Victoria Sugar Mill, AU	daily rain	38.9 mm (1.5 in)	22.4 mm (0.9 in)	45 years	34 of 100 (Routine)
31 May 1966	Santa Rosalia (Dge), MX	all-time high max	42.2 C (108.0 F)	0.5 C (0.9 F)	35 years	34 of 100 (Routine)
31 May 1966	Isabela Substn, PR	daily rain	72.4 mm (2.9 in)	37.3 mm (1.5 in)	21 years	34 of 100 (Routine)
31 May 1966	Atalaia, BR	daily rain	91.4 mm (3.6 in)	30.0 mm (1.2 in)	48 years	33 of 100 (Routine)
31 May 1966	Seymour 1 WSW, US	daily low min	1.7 C (35.1 F)	2.7 C (4.9 F)	71 years	33 of 100 (Routine)
31 May 1966	Hillsdale, US	daily low min	-1.7 C (28.9 F)	3.4 C (6.1 F)	68 years	33 of 100 (Routine)
31 May 1966	Winnsboro, US	daily low max	18.3 C (64.9 F)	3.9 C (7.0 F)	59 years	33 of 100 (Routine)
31 May 1966	Basin, US	daily high min	16.1 C (61.0 F)	3.3 C (5.9 F)	64 years	33 of 100 (Routine)
31 May 1966	Macknade Sugar Mill, AU	daily rain	31.5 mm (1.2 in)	18.3 mm (0.7 in)	48 years	32 of 100 (Routine)
31 May 1966	Claresholm Meadow Creek, CA	daily rain	26.7 mm (1.1 in)	11.2 mm (0.4 in)	43 years	32 of 100 (Routine)
31 May 1966	Toledo Blade, US	daily low min	2.2 C (36.0 F)	1.1 C (2.0 F)	71 years	32 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 1966

Records set or tied on this calendar date in each year from 1811 to 1966. 1966 had 601 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 1966-05-31: 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	419
20 to 40	10
40 to 60	3
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	2