Weather Records on 27 May 2010

955 weather records were set or tied worldwide on 27 May 2010. Highest significance: Saint Helena, US.

Key Facts for 27 May 2010

On 27 May 2010, 955 weather records were set or tied at long-record stations worldwide.
502 were record highs and 192 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 44 monthly and 907 daily.
Saint Helena set a daily record precipitation of 30.5 mm (1.2 in) on 27 May 2010.
Across 164 earlier years (1797 to 2026) the same calendar date averaged 414 records.

Record Map

955 stations

955 station records on 27 May 2010 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 May 2010: highest significance records shown on the map
Station	Country	Type	Value	Significance
Saint Helena	United States	Record daily precipitation	30.5 mm (1.2 in)	65 of 100 (Major)
Beaver	United States	Record daily precipitation	59.7 mm (2.4 in)	62 of 100 (Major)
Ariah Park Post Office	Australia	Record daily precipitation	37.8 mm (1.5 in)	54 of 100 (Notable)
Burrawang (Range Street)	Australia	Record daily precipitation	82.8 mm (3.3 in)	53 of 100 (Notable)
Amherst	United States	Record high maximum temperature	36.7 C (98.1 F)	53 of 100 (Notable)
Blackleaf	United States	Record daily precipitation	101.6 mm (4.0 in)	52 of 100 (Notable)
Boise Lucky Peak Dam	United States	Record daily precipitation	53.3 mm (2.1 in)	51 of 100 (Notable)
Ogdensburg 4 NE	United States	Record high maximum temperature	35.0 C (95.0 F)	51 of 100 (Notable)
Storrs	United States	Record high maximum temperature	33.9 C (93.0 F)	50 of 100 (Notable)
Minot Intl AP	United States	Record daily precipitation	49.8 mm (2.0 in)	48 of 100 (Notable)
Nordby (Fano)	Denmark	Record low minimum temperature	2.3 C (36.1 F)	47 of 100 (Notable)
Portola	United States	Record daily snowfall	5.1 cm (2.0 in)	47 of 100 (Notable)
Groongal (Groongal Station)	Australia	Record daily precipitation	25.0 mm (1.0 in)	46 of 100 (Notable)
Babb 6 NE	United States	Record daily precipitation	58.2 mm (2.3 in)	44 of 100 (Notable)
Kingston	United States	Record high maximum temperature	35.0 C (95.0 F)	44 of 100 (Notable)
Wentworth Falls Country Club	Australia	Record daily precipitation	44.4 mm (1.7 in)	43 of 100 (Notable)
Nezperce	United States	Record daily precipitation	25.1 mm (1.0 in)	43 of 100 (Notable)
Blackheath (Lawrence St)	Australia	Record daily precipitation	44.4 mm (1.7 in)	42 of 100 (Notable)
Marrickville Golf Club	Australia	Record daily precipitation	28.0 mm (1.1 in)	42 of 100 (Notable)
Petropavlovsk-Kamchatskij	Russia	Record high maximum temperature	20.1 C (68.2 F)	42 of 100 (Notable)
Lynch	United States	Record high minimum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Castlereagh (Castlereagh Road)	Australia	Record daily precipitation	32.3 mm (1.3 in)	41 of 100 (Notable)
Norton W	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Whitefish Pt	United States	Record high maximum temperature	26.7 C (80.1 F)	41 of 100 (Notable)
Del Bonita	United States	Record daily precipitation	50.8 mm (2.0 in)	41 of 100 (Notable)
Lindsay	United States	Record daily precipitation	27.7 mm (1.1 in)	41 of 100 (Notable)
Keene	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Nemours (Ghazaouet)	Algeria	Record high minimum temperature	20.1 C (68.2 F)	40 of 100 (Notable)
Aldervale	Australia	Record daily precipitation	26.4 mm (1.0 in)	40 of 100 (Notable)
Wattamolla (Tamol)	Australia	Record daily precipitation	106.6 mm (4.2 in)	40 of 100 (Notable)
Manassa	United States	Record high minimum temperature	10.6 C (51.1 F)	40 of 100 (Notable)
Conrad	United States	Record daily precipitation	40.1 mm (1.6 in)	40 of 100 (Notable)
Buxton (Amaroo)	Australia	Record daily precipitation	37.4 mm (1.5 in)	39 of 100 (Notable)
Christchurch Intl	New Zealand	Record daily precipitation	30.5 mm (1.2 in)	39 of 100 (Notable)
Songkhla	Thailand	Record high maximum temperature	38.6 C (101.5 F)	39 of 100 (Notable)
Cloverdale	United States	Record daily precipitation	38.1 mm (1.5 in)	39 of 100 (Notable)
Lawrence	United States	Record high maximum temperature	35.0 C (95.0 F)	39 of 100 (Notable)
Liberty 1 NE	United States	Record high maximum temperature	31.1 C (88.0 F)	39 of 100 (Notable)
Mohonk Lake	United States	Record high maximum temperature	32.8 C (91.0 F)	39 of 100 (Notable)
Morrisville 6 SW	United States	Record high maximum temperature	31.1 C (88.0 F)	39 of 100 (Notable)
Old Forge	United States	Record high maximum temperature	31.1 C (88.0 F)	39 of 100 (Notable)
Glenbrook Bowling Club	Australia	Record daily precipitation	39.0 mm (1.5 in)	38 of 100 (Notable)
Brooklyn (Sandbrook Inlet)	Australia	Record daily precipitation	45.5 mm (1.8 in)	38 of 100 (Notable)
Pennant Hills (Yarrara Road)	Australia	Record daily precipitation	42.6 mm (1.7 in)	38 of 100 (Notable)
Gardiner	United States	Record high maximum temperature	31.1 C (88.0 F)	38 of 100 (Notable)
Hastings	United States	Record high maximum temperature	31.7 C (89.1 F)	38 of 100 (Notable)
Charlotteburg Rsvr	United States	Record high maximum temperature	33.3 C (91.9 F)	38 of 100 (Notable)
Dunn Ctr 1E	United States	Record daily precipitation	27.7 mm (1.1 in)	38 of 100 (Notable)
Marysville	United States	Record high minimum temperature	20.6 C (69.1 F)	38 of 100 (Notable)
Camden Airport AWS	Australia	Record daily precipitation	40.8 mm (1.6 in)	37 of 100 (Notable)
Kyra	Russia	Record daily precipitation	30.4 mm (1.2 in)	37 of 100 (Notable)
Potlatch 3 NNE	United States	Record low maximum temperature	10.6 C (51.1 F)	37 of 100 (Notable)
Middle Dam	United States	Record high maximum temperature	28.9 C (84.0 F)	37 of 100 (Notable)
Norwich	United States	Record high maximum temperature	33.3 C (91.9 F)	37 of 100 (Notable)
Ardmore 1 NW	United States	Record high minimum temperature	16.1 C (61.0 F)	37 of 100 (Notable)
Port Isabel	United States	Record low minimum temperature	18.9 C (66.0 F)	37 of 100 (Notable)
Oakdale (Cooyong Park)	Australia	Record daily precipitation	33.8 mm (1.3 in)	36 of 100 (Notable)
Warner Glen	Australia	Record daily precipitation	66.0 mm (2.6 in)	35 of 100 (Notable)
Falls Village	United States	Record high maximum temperature	32.8 C (91.0 F)	35 of 100 (Notable)
Boonton 1 SE	United States	Record high maximum temperature	33.9 C (93.0 F)	35 of 100 (Notable)

Counts by Type and Timescale

955 records

Records set or tied on 27 May 2010 by type: Highest daily maximum 276, Lowest daily maximum 103, Highest daily minimum 226, Lowest daily minimum 89, Heaviest daily rainfall 256, Heaviest daily snowfall 3, Deepest snow cover 2.

Records on 27 May 2010 by type
Record type	Records
Highest daily maximum	276
Lowest daily maximum	103
Highest daily minimum	226
Lowest daily minimum	89
Heaviest daily rainfall	256
Heaviest daily snowfall	3
Deepest snow cover	2

Records on 27 May 2010 by timescale: all-time 4, monthly 44, daily 907.

How Much Records Were Beaten By

707 broken records

Margins by which the 707 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 59.4. Ties are not counted.

Top 20 by Significance

27 May 2010

Top 20 records on 27 May 2010 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 May 2010	Saint Helena, US	daily rain	30.5 mm (1.2 in)	21.4 mm (0.8 in)	96 years	65 of 100 (Major)
27 May 2010	Beaver, US	daily rain	59.7 mm (2.4 in)	29.7 mm (1.2 in)	112 years	62 of 100 (Major)
27 May 2010	Ariah Park Post Office, AU	daily rain	37.8 mm (1.5 in)	14.4 mm (0.6 in)	84 years	54 of 100 (Notable)
27 May 2010	Burrawang (Range Street), AU	daily rain	82.8 mm (3.3 in)	47.5 mm (1.9 in)	84 years	53 of 100 (Notable)
27 May 2010	Amherst, US	monthly high max	36.7 C (98.1 F)	2.3 C (4.1 F)	99 years	53 of 100 (Notable)
27 May 2010	Blackleaf, US	monthly rain	101.6 mm (4.0 in)	17.0 mm (0.7 in)	57 years	52 of 100 (Notable)
27 May 2010	Boise Lucky Peak Dam, US	all-time rain	53.3 mm (2.1 in)	5.8 mm (0.23 in)	52 years	51 of 100 (Notable)
27 May 2010	Ogdensburg 4 NE, US	monthly high max	35.0 C (95.0 F)	1.1 C (2.0 F)	99 years	51 of 100 (Notable)
27 May 2010	Storrs, US	monthly high max	33.9 C (93.0 F)	0.6 C (1.1 F)	99 years	50 of 100 (Notable)
27 May 2010	Minot Intl AP, US	daily rain	49.8 mm (2.0 in)	23.9 mm (0.9 in)	56 years	48 of 100 (Notable)
27 May 2010	Nordby (Fano), DK	daily low min	2.3 C (36.1 F)	2.1 C (3.8 F)	119 years	47 of 100 (Notable)
27 May 2010	Portola, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	93 years	47 of 100 (Notable)
27 May 2010	Groongal (Groongal Station), AU	daily rain	25.0 mm (1.0 in)	5.4 mm (0.21 in)	119 years	46 of 100 (Notable)
27 May 2010	Babb 6 NE, US	daily rain	58.2 mm (2.3 in)	30.5 mm (1.2 in)	23 years	44 of 100 (Notable)
27 May 2010	Kingston, US	daily high max	35.0 C (95.0 F)	2.8 C (5.0 F)	96 years	44 of 100 (Notable)
27 May 2010	Wentworth Falls Country Club, AU	daily rain	44.4 mm (1.7 in)	35.2 mm (1.4 in)	27 years	43 of 100 (Notable)
27 May 2010	Nezperce, US	daily rain	25.1 mm (1.0 in)	13.7 mm (0.5 in)	40 years	43 of 100 (Notable)
27 May 2010	Blackheath (Lawrence St), AU	daily rain	44.4 mm (1.7 in)	7.6 mm (0.30 in)	91 years	42 of 100 (Notable)
27 May 2010	Marrickville Golf Club, AU	daily rain	28.0 mm (1.1 in)	10.0 mm (0.4 in)	91 years	42 of 100 (Notable)
27 May 2010	Petropavlovsk-Kamchatskij, RU	daily high max	20.1 C (68.2 F)	0.9 C (1.6 F)	100 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 2010

Records set or tied on this calendar date in each year from 1797 to 2010. 2010 had 955 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 2010-05-27: 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	634
10 to 20	42
20 to 30	20
30 to 40	7
40 to 50	2
50 to 60	2