Weather Records on 31 May 1977

605 weather records were set or tied worldwide on 31 May 1977. Highest significance: Shepherds Flat, AU.

Key Facts for 31 May 1977

On 31 May 1977, 605 weather records were set or tied at long-record stations worldwide.
226 were record highs and 136 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 53 monthly and 552 daily.
Shepherds Flat set a monthly record daily precipitation of 84.2 mm (3.3 in) on 31 May 1977.
Across 161 earlier years (1811 to 2026) the same calendar date averaged 437 records.

Record Map

605 stations

605 station records on 31 May 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 May 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Shepherds Flat	Australia	Record daily precipitation	84.2 mm (3.3 in)	64 of 100 (Major)
Tarwin Lower (Riverside)	Australia	Record daily precipitation	47.4 mm (1.9 in)	63 of 100 (Major)
Aracaju	Brazil	Record daily precipitation	140.0 mm (5.5 in)	58 of 100 (Notable)
Begumpet Obsy	India	Record daily precipitation	50.0 mm (2.0 in)	57 of 100 (Notable)
Agnes River	Australia	Record daily precipitation	49.0 mm (1.9 in)	53 of 100 (Notable)
Chilliwack	Canada	Record daily precipitation	35.8 mm (1.4 in)	53 of 100 (Notable)
Lisboa Geofisica	Portugal	Record daily precipitation	37.0 mm (1.5 in)	52 of 100 (Notable)
Mazanovo	Russia	Record daily precipitation	32.0 mm (1.3 in)	51 of 100 (Notable)
Zhizdra	Russia	Record daily precipitation	29.4 mm (1.2 in)	50 of 100 (Notable)
Mabuiag Island	Australia	Record daily precipitation	78.0 mm (3.1 in)	47 of 100 (Notable)
Correntes	Brazil	Record daily precipitation	60.7 mm (2.4 in)	47 of 100 (Notable)
Grimsby	Canada	Record daily precipitation	44.5 mm (1.8 in)	45 of 100 (Notable)
Herington	United States	Record daily precipitation	60.7 mm (2.4 in)	45 of 100 (Notable)
Grapeview 3 SW	United States	Record daily precipitation	31.2 mm (1.2 in)	45 of 100 (Notable)
Lubny	Ukraine	Record daily precipitation	30.7 mm (1.2 in)	43 of 100 (Notable)
Winnsboro 5 SSE	United States	Record high maximum temperature	37.2 C (99.0 F)	43 of 100 (Notable)
Galeana (Smn)	Mexico	Record high minimum temperature	25.6 C (78.1 F)	42 of 100 (Notable)
Baudette	United States	Record daily precipitation	43.2 mm (1.7 in)	42 of 100 (Notable)
Willmar Wwtp	United States	Record daily precipitation	53.8 mm (2.1 in)	42 of 100 (Notable)
Reydon 2SSE	United States	Record daily precipitation	77.7 mm (3.1 in)	42 of 100 (Notable)
Olympia AP	United States	Record daily precipitation	28.7 mm (1.1 in)	41 of 100 (Notable)
Nordby (Fano)	Denmark	Record low minimum temperature	3.0 C (37.4 F)	40 of 100 (Notable)
Brjansk	Russia	Record daily precipitation	25.4 mm (1.0 in)	40 of 100 (Notable)
Toora	Australia	Record daily precipitation	43.0 mm (1.7 in)	39 of 100 (Notable)
Welshpool	Australia	Record daily precipitation	39.2 mm (1.5 in)	39 of 100 (Notable)
Lang Lang	Australia	Record daily precipitation	30.4 mm (1.2 in)	39 of 100 (Notable)
Traipu	Brazil	Record daily precipitation	47.8 mm (1.9 in)	39 of 100 (Notable)
Batesville	United States	Record high maximum temperature	37.2 C (99.0 F)	38 of 100 (Notable)
Nhill	Australia	Record low maximum temperature	8.4 C (47.1 F)	37 of 100 (Notable)
Cowes	Australia	Record daily precipitation	36.0 mm (1.4 in)	37 of 100 (Notable)
Abbotsford A	Canada	Record daily precipitation	44.6 mm (1.8 in)	37 of 100 (Notable)
La Motte (Bos)	South Africa	Record daily precipitation	75.0 mm (3.0 in)	37 of 100 (Notable)
Farmerville	United States	Record high maximum temperature	36.1 C (97.0 F)	37 of 100 (Notable)
New London	United States	Record daily precipitation	62.0 mm (2.4 in)	37 of 100 (Notable)
Billings	United States	Record daily precipitation	66.8 mm (2.6 in)	37 of 100 (Notable)
Loch Valley Plantation	Australia	Record daily precipitation	40.4 mm (1.6 in)	36 of 100 (Notable)
Usina Rio Dos Campos	Brazil	Record daily precipitation	72.8 mm (2.9 in)	36 of 100 (Notable)
Kristianstad	Sweden	Record low minimum temperature	1.4 C (34.5 F)	36 of 100 (Notable)
S Haven	United States	Record daily precipitation	32.0 mm (1.3 in)	36 of 100 (Notable)
Flagstaff AP	United States	Record high maximum temperature	30.0 C (86.0 F)	36 of 100 (Notable)
Ventnor (Oaklands)	Australia	Record daily precipitation	35.8 mm (1.4 in)	35 of 100 (Notable)
Bakuriani	Georgia	Record daily precipitation	55.0 mm (2.2 in)	35 of 100 (Notable)
Cape Schanck Lighthouse	Australia	Record daily precipitation	30.0 mm (1.2 in)	34 of 100 (Routine)
Shoreham	Australia	Record daily precipitation	48.6 mm (1.9 in)	34 of 100 (Routine)
Alouette Lake	Canada	Record daily precipitation	50.3 mm (2.0 in)	34 of 100 (Routine)
Tartu	Estonia	Record low minimum temperature	-0.7 C (30.7 F)	34 of 100 (Routine)
Jonkoping	Sweden	Record low minimum temperature	-1.8 C (28.8 F)	34 of 100 (Routine)
Telluride 4WNW	United States	Record high maximum temperature	27.8 C (82.0 F)	34 of 100 (Routine)
Ellsworth 1E	United States	Record daily precipitation	50.0 mm (2.0 in)	34 of 100 (Routine)
Newport	United States	Record daily precipitation	29.7 mm (1.2 in)	34 of 100 (Routine)
Stave Falls	Canada	Record daily precipitation	41.4 mm (1.6 in)	33 of 100 (Routine)
Tsalka	Georgia	Record daily precipitation	47.8 mm (1.9 in)	33 of 100 (Routine)
Ackerman	United States	Record daily precipitation	66.0 mm (2.6 in)	33 of 100 (Routine)
Ft Supply 3SE	United States	Record daily precipitation	42.4 mm (1.7 in)	33 of 100 (Routine)
Cloverdale	United States	Record daily precipitation	35.6 mm (1.4 in)	33 of 100 (Routine)
Bathurst Gaol	Australia	Record low maximum temperature	4.5 C (40.1 F)	32 of 100 (Routine)
Woodslee Cda	Canada	Record daily precipitation	29.4 mm (1.2 in)	32 of 100 (Routine)
Gruver	United States	Record daily precipitation	70.1 mm (2.8 in)	32 of 100 (Routine)
Deniliquin (Wilkinson St)	Australia	Record low maximum temperature	9.3 C (48.7 F)	31 of 100 (Routine)
Eastern View	Australia	Record daily precipitation	25.6 mm (1.0 in)	31 of 100 (Routine)

Counts by Type and Timescale

605 records

Records set or tied on 31 May 1977 by type: Highest daily maximum 161, Lowest daily maximum 38, Highest daily minimum 65, Lowest daily minimum 98, Heaviest daily rainfall 242, Deepest snow cover 1.

Records on 31 May 1977 by type
Record type	Records
Highest daily maximum	161
Lowest daily maximum	38
Highest daily minimum	65
Lowest daily minimum	98
Heaviest daily rainfall	242
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 31 May 1977 by timescale: all-time 0, monthly 53, daily 552.

How Much Records Were Beaten By

487 broken records

Margins by which the 487 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 70.1. Ties are not counted.

Top 20 by Significance

31 May 1977

Top 20 records on 31 May 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 May 1977	Shepherds Flat, AU	monthly rain	84.2 mm (3.3 in)	33.1 mm (1.3 in)	35 years	64 of 100 (Major)
31 May 1977	Tarwin Lower (Riverside), AU	daily rain	47.4 mm (1.9 in)	25.3 mm (1.0 in)	66 years	63 of 100 (Major)
31 May 1977	Aracaju, BR	daily rain	140.0 mm (5.5 in)	70.1 mm (2.8 in)	51 years	58 of 100 (Notable)
31 May 1977	Begumpet Obsy, IN	daily rain	50.0 mm (2.0 in)	40.6 mm (1.6 in)	34 years	57 of 100 (Notable)
31 May 1977	Agnes River, AU	daily rain	49.0 mm (1.9 in)	19.5 mm (0.8 in)	64 years	53 of 100 (Notable)
31 May 1977	Chilliwack, CA	daily rain	35.8 mm (1.4 in)	17.3 mm (0.7 in)	76 years	53 of 100 (Notable)
31 May 1977	Lisboa Geofisica, PT	daily rain	37.0 mm (1.5 in)	30.3 mm (1.2 in)	32 years	52 of 100 (Notable)
31 May 1977	Mazanovo, RU	daily rain	32.0 mm (1.3 in)	19.0 mm (0.7 in)	40 years	51 of 100 (Notable)
31 May 1977	Zhizdra, RU	daily rain	29.4 mm (1.2 in)	15.5 mm (0.6 in)	44 years	50 of 100 (Notable)
31 May 1977	Mabuiag Island, AU	daily rain	78.0 mm (3.1 in)	57.2 mm (2.3 in)	32 years	47 of 100 (Notable)
31 May 1977	Correntes, BR	daily rain	60.7 mm (2.4 in)	35.7 mm (1.4 in)	11 years	47 of 100 (Notable)
31 May 1977	Grimsby, CA	daily rain	44.5 mm (1.8 in)	27.0 mm (1.1 in)	18 years	45 of 100 (Notable)
31 May 1977	Herington, US	daily rain	60.7 mm (2.4 in)	44.2 mm (1.7 in)	34 years	45 of 100 (Notable)
31 May 1977	Grapeview 3 SW, US	daily rain	31.2 mm (1.2 in)	19.5 mm (0.8 in)	23 years	45 of 100 (Notable)
31 May 1977	Lubny, UA	daily rain	30.7 mm (1.2 in)	18.5 mm (0.7 in)	22 years	43 of 100 (Notable)
31 May 1977	Winnsboro 5 SSE, US	monthly high max	37.2 C (99.0 F)	0.5 C (0.9 F)	83 years	43 of 100 (Notable)
31 May 1977	Galeana (Smn), MX	daily high min	25.6 C (78.1 F)	8.9 C (16.0 F)	28 years	42 of 100 (Notable)
31 May 1977	Baudette, US	daily rain	43.2 mm (1.7 in)	15.0 mm (0.6 in)	58 years	42 of 100 (Notable)
31 May 1977	Willmar Wwtp, US	daily rain	53.8 mm (2.1 in)	28.9 mm (1.1 in)	18 years	42 of 100 (Notable)
31 May 1977	Reydon 2SSE, US	daily rain	77.7 mm (3.1 in)	57.4 mm (2.3 in)	8 years	42 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 1977

Records set or tied on this calendar date in each year from 1811 to 1977. 1977 had 605 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 1977-05-31: 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	400
10 to 20	53
20 to 30	18
30 to 40	6
40 to 50	5
50 to 60	4
60 to 70	0
70 to 80	1