Weather Records on 27 May 1966

398 weather records were set or tied worldwide on 27 May 1966. Highest significance: Estancia, BR.

Key Facts for 27 May 1966

On 27 May 1966, 398 weather records were set or tied at long-record stations worldwide.
213 were record highs and 102 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 7 monthly and 390 daily.
Estancia set a daily record precipitation of 68.2 mm (2.7 in) on 27 May 1966.
Across 164 earlier years (1797 to 2026) the same calendar date averaged 418 records.

Record Map

398 stations

398 station records on 27 May 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 May 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Estancia	Brazil	Record daily precipitation	68.2 mm (2.7 in)	47 of 100 (Notable)
Joao Dias	Brazil	Record daily precipitation	82.9 mm (3.3 in)	46 of 100 (Notable)
Norsk	Russia	Record daily precipitation	33.5 mm (1.3 in)	46 of 100 (Notable)
Zugspitze	Germany	Record daily precipitation	53.5 mm (2.1 in)	39 of 100 (Notable)
Patamute	Brazil	Record daily precipitation	35.0 mm (1.4 in)	38 of 100 (Notable)
Athens	United States	Record daily precipitation	213.9 mm (8.4 in)	38 of 100 (Notable)
New Westminster	Canada	Record low minimum temperature	2.8 C (37.0 F)	37 of 100 (Notable)
Toccoa	United States	Record daily precipitation	62.5 mm (2.5 in)	36 of 100 (Notable)
Portland Rfc City	United States	Record low minimum temperature	4.4 C (39.9 F)	36 of 100 (Notable)
Celaya (Smn)	Mexico	Record low maximum temperature	17.8 C (64.0 F)	35 of 100 (Notable)
Schierke	Germany	Record daily precipitation	38.3 mm (1.5 in)	34 of 100 (Routine)
Butler	United States	Record daily precipitation	66.3 mm (2.6 in)	34 of 100 (Routine)
Bishopville 1.4 ENE	United States	Record daily precipitation	70.1 mm (2.8 in)	34 of 100 (Routine)
Americus	United States	Record daily precipitation	54.4 mm (2.1 in)	33 of 100 (Routine)
Red Oak	United States	Record high maximum temperature	34.4 C (93.9 F)	33 of 100 (Routine)
Acu	Brazil	Record daily precipitation	38.3 mm (1.5 in)	32 of 100 (Routine)
Bancroft	Canada	Record daily precipitation	34.8 mm (1.4 in)	32 of 100 (Routine)
Patillas Dam	Puerto Rico [United States]	Record daily precipitation	83.8 mm (3.3 in)	32 of 100 (Routine)
Challis	United States	Record high maximum temperature	33.9 C (93.0 F)	32 of 100 (Routine)
Sonnblick	Austria	Record daily precipitation	30.6 mm (1.2 in)	31 of 100 (Routine)
Athens College of Ag	United States	Record daily precipitation	63.8 mm (2.5 in)	31 of 100 (Routine)
Tecumseh 1S	United States	Record high maximum temperature	35.0 C (95.0 F)	31 of 100 (Routine)
Concrete Ppl Fish STN	United States	Record low minimum temperature	1.7 C (35.1 F)	31 of 100 (Routine)
Lincoln UNIV Pwr Plt	United States	Record high maximum temperature	35.0 C (95.0 F)	31 of 100 (Routine)
Chilliwack	Canada	Record low minimum temperature	2.2 C (36.0 F)	30 of 100 (Routine)
Schwerin	Germany	Record low maximum temperature	10.4 C (50.7 F)	30 of 100 (Routine)
Piaxtla	Mexico	Record daily precipitation	45.0 mm (1.8 in)	30 of 100 (Routine)
Elatma	Russia	Record high minimum temperature	17.1 C (62.8 F)	30 of 100 (Routine)
Pipestone	United States	Record high maximum temperature	32.8 C (91.0 F)	30 of 100 (Routine)
Crete 4ESE	United States	Record high maximum temperature	34.4 C (93.9 F)	30 of 100 (Routine)
Kingstree	United States	Record daily precipitation	116.8 mm (4.6 in)	30 of 100 (Routine)
Salvador	Brazil	Record daily precipitation	63.7 mm (2.5 in)	29 of 100 (Routine)
Kirchdorf/Poel	Germany	Record low maximum temperature	10.4 C (50.7 F)	29 of 100 (Routine)
Porthill	United States	Record high minimum temperature	13.3 C (55.9 F)	29 of 100 (Routine)
Maunabo	Puerto Rico [United States]	Record daily precipitation	76.2 mm (3.0 in)	28 of 100 (Routine)
Hughton	Canada	Record high maximum temperature	34.4 C (93.9 F)	27 of 100 (Routine)
Statesville 2 NNE	United States	Record daily precipitation	38.4 mm (1.5 in)	27 of 100 (Routine)
Sedro-Woolley	United States	Record low minimum temperature	1.1 C (34.0 F)	27 of 100 (Routine)
Georgetown Post Office	Australia	Record low maximum temperature	22.2 C (72.0 F)	26 of 100 (Routine)
Quixeramobim	Brazil	Record daily precipitation	35.2 mm (1.4 in)	26 of 100 (Routine)
Stave Falls	Canada	Record low minimum temperature	2.8 C (37.0 F)	26 of 100 (Routine)
Clayton 1 SSW	United States	Record daily precipitation	71.4 mm (2.8 in)	26 of 100 (Routine)
Bonners Ferry	United States	Record high minimum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
Beatrice	United States	Record high maximum temperature	35.0 C (95.0 F)	26 of 100 (Routine)
David City 4E	United States	Record high maximum temperature	33.9 C (93.0 F)	26 of 100 (Routine)
Effingham	United States	Record daily precipitation	52.3 mm (2.1 in)	26 of 100 (Routine)
Anacortes	United States	Record low minimum temperature	2.8 C (37.0 F)	26 of 100 (Routine)
Northport	United States	Record high minimum temperature	16.1 C (61.0 F)	26 of 100 (Routine)
Fichtelberg	Germany	Record daily precipitation	26.9 mm (1.1 in)	25 of 100 (Routine)
Isla Perez	Mexico	Record high maximum temperature	36.7 C (98.1 F)	25 of 100 (Routine)
Salem AP (McNary Field)	United States	Record low minimum temperature	-1.1 C (30.0 F)	25 of 100 (Routine)
Afonso Bezerra	Brazil	Record daily precipitation	30.8 mm (1.2 in)	24 of 100 (Routine)
Viking	Canada	Record high minimum temperature	14.4 C (57.9 F)	24 of 100 (Routine)
Milesovka	Czech Republic	Record low maximum temperature	5.8 C (42.4 F)	24 of 100 (Routine)
Clay Ctr	United States	Record high maximum temperature	35.6 C (96.1 F)	24 of 100 (Routine)
Pawnee City	United States	Record high maximum temperature	34.4 C (93.9 F)	24 of 100 (Routine)
Manitowoc	United States	Record high maximum temperature	27.8 C (82.0 F)	24 of 100 (Routine)
Concordia ASOS	United States	Record high maximum temperature	33.9 C (93.0 F)	24 of 100 (Routine)
Calmar	Canada	Record high minimum temperature	12.8 C (55.0 F)	23 of 100 (Routine)
Santa Rosalia (Dge)	Mexico	Record high maximum temperature	41.1 C (106.0 F)	23 of 100 (Routine)

Counts by Type and Timescale

398 records

Records set or tied on 27 May 1966 by type: Highest daily maximum 140, Lowest daily maximum 35, Highest daily minimum 73, Lowest daily minimum 67, Heaviest daily rainfall 82, Heaviest daily snowfall 1.

Records on 27 May 1966 by type
Record type	Records
Highest daily maximum	140
Lowest daily maximum	35
Highest daily minimum	73
Lowest daily minimum	67
Heaviest daily rainfall	82
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 27 May 1966 by timescale: all-time 1, monthly 7, daily 390.

How Much Records Were Beaten By

291 broken records

Margins by which the 291 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 62.4. Ties are not counted.

Top 20 by Significance

27 May 1966

Top 20 records on 27 May 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 May 1966	Estancia, BR	daily rain	68.2 mm (2.7 in)	52.2 mm (2.1 in)	41 years	47 of 100 (Notable)
27 May 1966	Joao Dias, BR	daily rain	82.9 mm (3.3 in)	62.4 mm (2.5 in)	31 years	46 of 100 (Notable)
27 May 1966	Norsk, RU	daily rain	33.5 mm (1.3 in)	25.9 mm (1.0 in)	7 years	46 of 100 (Notable)
27 May 1966	Zugspitze, DE	daily rain	53.5 mm (2.1 in)	29.6 mm (1.2 in)	0 years	39 of 100 (Notable)
27 May 1966	Patamute, BR	daily rain	35.0 mm (1.4 in)	21.8 mm (0.9 in)	36 years	38 of 100 (Notable)
27 May 1966	Athens, US	all-time rain	213.9 mm (8.4 in)	11.2 mm (0.4 in)	2 years	38 of 100 (Notable)
27 May 1966	New Westminster, CA	daily low min	2.8 C (37.0 F)	0.5 C (0.9 F)	90 years	37 of 100 (Notable)
27 May 1966	Toccoa, US	daily rain	62.5 mm (2.5 in)	38.9 mm (1.5 in)	7 years	36 of 100 (Notable)
27 May 1966	Portland Rfc City, US	daily low min	4.4 C (39.9 F)	0.6 C (1.1 F)	84 years	36 of 100 (Notable)
27 May 1966	Celaya (Smn), MX	daily low max	17.8 C (64.0 F)	7.2 C (13.0 F)	36 years	35 of 100 (Notable)
27 May 1966	Schierke, DE	monthly rain	38.3 mm (1.5 in)	7.6 mm (0.30 in)	13 years	34 of 100 (Routine)
27 May 1966	Butler, US	daily rain	66.3 mm (2.6 in)	34.0 mm (1.3 in)	33 years	34 of 100 (Routine)
27 May 1966	Bishopville 1.4 ENE, US	daily rain	70.1 mm (2.8 in)	32.8 mm (1.3 in)	28 years	34 of 100 (Routine)
27 May 1966	Americus, US	daily rain	54.4 mm (2.1 in)	27.2 mm (1.1 in)	15 years	33 of 100 (Routine)
27 May 1966	Red Oak, US	daily high max	34.4 C (93.9 F)	3.8 C (6.8 F)	65 years	33 of 100 (Routine)
27 May 1966	Acu, BR	daily rain	38.3 mm (1.5 in)	30.1 mm (1.2 in)	16 years	32 of 100 (Routine)
27 May 1966	Bancroft, CA	daily rain	34.8 mm (1.4 in)	14.0 mm (0.6 in)	25 years	32 of 100 (Routine)
27 May 1966	Patillas Dam, PR	daily rain	83.8 mm (3.3 in)	36.3 mm (1.4 in)	35 years	32 of 100 (Routine)
27 May 1966	Challis, US	monthly high max	33.9 C (93.0 F)	0.6 C (1.1 F)	46 years	32 of 100 (Routine)
27 May 1966	Sonnblick, AT	daily rain	30.6 mm (1.2 in)	8.6 mm (0.34 in)	52 years	31 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

1797 to 1966

Records set or tied on this calendar date in each year from 1797 to 1966. 1966 had 398 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 1966-05-27: 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 10	261
10 to 20	11
20 to 30	11
30 to 40	5
40 to 50	1
50 to 60	1
60 to 70	1