Weather Records on 27 May 1977

663 weather records were set or tied worldwide on 27 May 1977. Highest significance: White Cliffs (Tongo), AU.

Key Facts for 27 May 1977

On 27 May 1977, 663 weather records were set or tied at long-record stations worldwide.
176 were record highs and 210 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 21 monthly and 642 daily.
White Cliffs (Tongo) set a daily record precipitation of 55.9 mm (2.2 in) on 27 May 1977.
Across 164 earlier years (1797 to 2026) the same calendar date averaged 416 records.

Record Map

663 stations

663 station records on 27 May 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 May 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
White Cliffs (Tongo)	Australia	Record daily precipitation	55.9 mm (2.2 in)	71 of 100 (Major)
Nappa Merrie	Australia	Record daily precipitation	110.0 mm (4.3 in)	57 of 100 (Notable)
Orland	United States	Record daily precipitation	36.8 mm (1.4 in)	55 of 100 (Notable)
Wyanga (Barcoo)	Australia	Record daily precipitation	95.0 mm (3.7 in)	54 of 100 (Notable)
Fords Bridge	Australia	Record daily precipitation	74.4 mm (2.9 in)	52 of 100 (Notable)
Simao Dias (Anapolis)	Brazil	Record daily precipitation	79.0 mm (3.1 in)	52 of 100 (Notable)
Guantanamo Bay NAS	Cuba	Record daily precipitation	99.8 mm (3.9 in)	51 of 100 (Notable)
Norley Station	Australia	Record daily precipitation	54.0 mm (2.1 in)	50 of 100 (Notable)
Sitio Dos Moreiras	Brazil	Record daily precipitation	40.3 mm (1.6 in)	50 of 100 (Notable)
Vinson	United States	Record daily precipitation	100.1 mm (3.9 in)	49 of 100 (Notable)
Nguiu	Australia	Record daily precipitation	32.0 mm (1.3 in)	47 of 100 (Notable)
Yajlju	Russia	Record daily precipitation	45.4 mm (1.8 in)	46 of 100 (Notable)
Saragt	Turkmenistan	Record daily precipitation	25.0 mm (1.0 in)	45 of 100 (Notable)
Estancia	Brazil	Record daily precipitation	77.6 mm (3.1 in)	44 of 100 (Notable)
Ribeira Do Pombal (Pombal)	Brazil	Record daily precipitation	57.3 mm (2.3 in)	44 of 100 (Notable)
Goodooga (Brenda)	Australia	Record daily precipitation	26.4 mm (1.0 in)	43 of 100 (Notable)
Cobar (Tambua)	Australia	Record daily precipitation	71.9 mm (2.8 in)	43 of 100 (Notable)
San Diego de la Union	Mexico	Record daily precipitation	33.5 mm (1.3 in)	42 of 100 (Notable)
Lookeba 1 N	United States	Record daily precipitation	88.1 mm (3.5 in)	42 of 100 (Notable)
Summerville 4W	United States	Record daily precipitation	87.1 mm (3.4 in)	42 of 100 (Notable)
Ico	Brazil	Record daily precipitation	30.0 mm (1.2 in)	39 of 100 (Notable)
Washburn	United States	Record daily precipitation	31.8 mm (1.3 in)	39 of 100 (Notable)
Roosevelt	United States	Record daily precipitation	90.7 mm (3.6 in)	38 of 100 (Notable)
Tilpa (Tongo Road)	Australia	Record daily precipitation	25.0 mm (1.0 in)	37 of 100 (Notable)
Aracaju	Brazil	Record daily precipitation	180.1 mm (7.1 in)	37 of 100 (Notable)
Pelion 0.8 NW	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Stillwater Power House	Canada	Record daily precipitation	30.0 mm (1.2 in)	36 of 100 (Notable)
Warroo (Geeron)	Australia	Record daily precipitation	49.0 mm (1.9 in)	35 of 100 (Notable)
Paripiranga	Brazil	Record daily precipitation	62.0 mm (2.4 in)	35 of 100 (Notable)
Turkestan	Kazakhstan	Record high minimum temperature	23.3 C (73.9 F)	35 of 100 (Notable)
Hornepayne	Canada	Record high maximum temperature	33.0 C (91.4 F)	34 of 100 (Routine)
Calarasi	Romania	Record low maximum temperature	14.0 C (57.2 F)	34 of 100 (Routine)
Bucklin 1SE	United States	Record daily precipitation	81.3 mm (3.2 in)	34 of 100 (Routine)
El Reno 1 N	United States	Record daily precipitation	50.3 mm (2.0 in)	34 of 100 (Routine)
Arrabury Station	Australia	Record daily precipitation	25.0 mm (1.0 in)	33 of 100 (Routine)
Cypress River	Canada	Record daily precipitation	46.5 mm (1.8 in)	33 of 100 (Routine)
Yantabulla Station	Australia	Record daily precipitation	51.4 mm (2.0 in)	32 of 100 (Routine)
Collerina (Kenebree)	Australia	Record daily precipitation	99.2 mm (3.9 in)	31 of 100 (Routine)
Turbine	Canada	Record high maximum temperature	33.3 C (91.9 F)	31 of 100 (Routine)
Catemaco	Mexico	Record high minimum temperature	28.9 C (84.0 F)	31 of 100 (Routine)
Kursk	Russia	Record low maximum temperature	6.6 C (43.9 F)	31 of 100 (Routine)
Taloga	United States	Record daily precipitation	36.3 mm (1.4 in)	31 of 100 (Routine)
Richmond Post Office	Australia	Record high maximum temperature	34.0 C (93.2 F)	30 of 100 (Routine)
Greenethorpe (Iandra)	Australia	Record daily precipitation	53.8 mm (2.1 in)	30 of 100 (Routine)
Ft Lauderdale	United States	Record low maximum temperature	22.8 C (73.0 F)	30 of 100 (Routine)
Kershaw 1SW	United States	Record daily precipitation	45.2 mm (1.8 in)	30 of 100 (Routine)
Norfolk Karl Stefan Mem AP	United States	Record daily precipitation	66.3 mm (2.6 in)	30 of 100 (Routine)
Big Creek	Canada	Record low maximum temperature	7.8 C (46.0 F)	29 of 100 (Routine)
Apatzingan (Smn)	Mexico	Record high minimum temperature	30.0 C (86.0 F)	29 of 100 (Routine)
Arad	Romania	Record low minimum temperature	2.7 C (36.9 F)	29 of 100 (Routine)
Stornoway Airport	United Kingdom	Record high maximum temperature	20.7 C (69.3 F)	29 of 100 (Routine)
Newberry-Luce Co Rd Commission	United States	Record high maximum temperature	30.6 C (87.1 F)	29 of 100 (Routine)
Ft Ripley	United States	Record daily precipitation	60.2 mm (2.4 in)	29 of 100 (Routine)
Madison	United States	Record daily precipitation	55.1 mm (2.2 in)	29 of 100 (Routine)
Cordell	United States	Record daily precipitation	75.7 mm (3.0 in)	29 of 100 (Routine)
Edgefield 3 NNE	United States	Record daily precipitation	110.5 mm (4.4 in)	29 of 100 (Routine)
Sapphire Post Office	Australia	Record daily precipitation	40.0 mm (1.6 in)	28 of 100 (Routine)
Barra de Sao Pedro (Manaca)	Brazil	Record daily precipitation	28.0 mm (1.1 in)	28 of 100 (Routine)
Keremeos	Canada	Record low minimum temperature	1.1 C (34.0 F)	28 of 100 (Routine)
Thornlea	South Africa	Record daily precipitation	40.6 mm (1.6 in)	28 of 100 (Routine)

Counts by Type and Timescale

663 records

Records set or tied on 27 May 1977 by type: Highest daily maximum 89, Lowest daily maximum 120, Highest daily minimum 87, Lowest daily minimum 90, Heaviest daily rainfall 271, Heaviest daily snowfall 5, Deepest snow cover 1.

Records on 27 May 1977 by type
Record type	Records
Highest daily maximum	89
Lowest daily maximum	120
Highest daily minimum	87
Lowest daily minimum	90
Heaviest daily rainfall	271
Heaviest daily snowfall	5
Deepest snow cover	1

Records on 27 May 1977 by timescale: all-time 0, monthly 21, daily 642.

How Much Records Were Beaten By

536 broken records

Margins by which the 536 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 83.3. Ties are not counted.

Top 20 by Significance

27 May 1977

Top 20 records on 27 May 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 May 1977	White Cliffs (Tongo), AU	daily rain	55.9 mm (2.2 in)	35.8 mm (1.4 in)	86 years	71 of 100 (Major)
27 May 1977	Nappa Merrie, AU	monthly rain	110.0 mm (4.3 in)	60.0 mm (2.4 in)	0 years	57 of 100 (Notable)
27 May 1977	Orland, US	monthly rain	36.8 mm (1.4 in)	8.6 mm (0.34 in)	72 years	55 of 100 (Notable)
27 May 1977	Wyanga (Barcoo), AU	monthly rain	95.0 mm (3.7 in)	27.9 mm (1.1 in)	33 years	54 of 100 (Notable)
27 May 1977	Fords Bridge, AU	daily rain	74.4 mm (2.9 in)	63.5 mm (2.5 in)	15 years	52 of 100 (Notable)
27 May 1977	Simao Dias (Anapolis), BR	daily rain	79.0 mm (3.1 in)	42.3 mm (1.7 in)	36 years	52 of 100 (Notable)
27 May 1977	Guantanamo Bay NAS, CU	daily rain	99.8 mm (3.9 in)	83.3 mm (3.3 in)	27 years	51 of 100 (Notable)
27 May 1977	Norley Station, AU	monthly rain	54.0 mm (2.1 in)	4.5 mm (0.18 in)	86 years	50 of 100 (Notable)
27 May 1977	Sitio Dos Moreiras, BR	daily rain	40.3 mm (1.6 in)	28.5 mm (1.1 in)	40 years	50 of 100 (Notable)
27 May 1977	Vinson, US	daily rain	100.1 mm (3.9 in)	68.3 mm (2.7 in)	20 years	49 of 100 (Notable)
27 May 1977	Nguiu, AU	daily rain	32.0 mm (1.3 in)	30.5 mm (1.2 in)	56 years	47 of 100 (Notable)
27 May 1977	Yajlju, RU	daily rain	45.4 mm (1.8 in)	24.0 mm (0.9 in)	28 years	46 of 100 (Notable)
27 May 1977	Saragt, TM	daily rain	25.0 mm (1.0 in)	19.4 mm (0.8 in)	34 years	45 of 100 (Notable)
27 May 1977	Estancia, BR	daily rain	77.6 mm (3.1 in)	62.7 mm (2.5 in)	11 years	44 of 100 (Notable)
27 May 1977	Ribeira Do Pombal (Pombal), BR	daily rain	57.3 mm (2.3 in)	37.7 mm (1.5 in)	11 years	44 of 100 (Notable)
27 May 1977	Goodooga (Brenda), AU	daily rain	26.4 mm (1.0 in)	6.8 mm (0.27 in)	90 years	43 of 100 (Notable)
27 May 1977	Cobar (Tambua), AU	monthly rain	71.9 mm (2.8 in)	17.0 mm (0.7 in)	29 years	43 of 100 (Notable)
27 May 1977	San Diego de la Union, MX	daily rain	33.5 mm (1.3 in)	23.6 mm (0.9 in)	42 years	42 of 100 (Notable)
27 May 1977	Lookeba 1 N, US	daily rain	88.1 mm (3.5 in)	57.6 mm (2.3 in)	20 years	42 of 100 (Notable)
27 May 1977	Summerville 4W, US	daily rain	87.1 mm (3.4 in)	26.1 mm (1.0 in)	55 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

1797 to 1977

Records set or tied on this calendar date in each year from 1797 to 1977. 1977 had 663 records.

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

Records on 05-27 in each year
Year	Records
1797	1
1817	1
1818	1
1834	2
1836	4
1839	1
1845	1
1846	1
1847	1
1849	1
1852	1
1858	1
1860	1
1863	1
1864	3
1868	4
1869	1
1874	1
1876	1
1879	3
1880	5
1881	2
1883	1
1884	1
1885	1
1886	1
1888	1
1889	3
1890	5
1891	2
1892	8
1893	5
1894	13
1895	4
1896	3
1897	1
1898	3
1899	2
1900	4
1901	7
1902	12
1903	7
1904	11
1905	7
1906	28
1907	23
1908	16
1909	7
1910	31
1911	53
1912	27
1913	19
1914	92
1915	63
1916	26
1917	23
1918	39
1919	38
1920	40
1921	56
1922	36
1923	86
1924	92
1925	291
1926	107
1927	183
1928	81
1929	195
1930	99
1931	367
1932	265
1933	284
1934	393
1935	128
1936	468
1937	298
1938	492
1939	312
1940	138
1941	436
1942	657
1943	160
1944	479
1945	272
1946	424
1947	485
1948	324
1949	366
1950	697
1951	578
1952	258
1953	603
1954	367
1955	571
1956	491
1957	367
1958	619
1959	449
1960	421
1961	1,504
1962	460
1963	421
1964	317
1965	652
1966	398
1967	492
1968	605
1969	850
1970	326
1971	612
1972	508
1973	943
1974	630
1975	404
1976	589
1977	663
1978	814
1979	899
1980	644
1981	891
1982	838
1983	1,253
1984	834
1985	873
1986	696
1987	1,037
1988	777
1989	904
1990	804
1991	1,429
1992	1,413
1993	835
1994	848
1995	815
1996	1,378
1997	919
1998	1,079
1999	876
2000	1,347
2001	898
2002	511
2003	918
2004	838
2005	1,094
2006	1,171
2007	886
2008	914
2009	858
2010	955
2011	1,055
2012	1,475
2013	607
2014	835
2015	537
2016	622
2017	541
2018	1,355
2019	960
2020	906
2021	414
2022	653
2023	405
2024	904
2025	761
2026	1,185

Download the Data

Data for records on 1977-05-27: 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	498
20 to 40	29
40 to 60	4
60 to 80	4
80 to 100	1