Weather Records on 27 May 1990

804 weather records were set or tied worldwide on 27 May 1990. Highest significance: San Rafael-Civic Ctr, US.

Key Facts for 27 May 1990

On 27 May 1990, 804 weather records were set or tied at long-record stations worldwide.
233 were record highs and 223 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 45 monthly and 757 daily.
San Rafael-Civic Ctr set a daily record precipitation of 50.5 mm (2.0 in) on 27 May 1990.
Across 164 earlier years (1797 to 2026) the same calendar date averaged 415 records.

Record Map

804 stations

804 station records on 27 May 1990 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 May 1990: highest significance records shown on the map
Station	Country	Type	Value	Significance
San Rafael-Civic Ctr	United States	Record daily precipitation	50.5 mm (2.0 in)	77 of 100 (Major)
Healdsburg	United States	Record daily precipitation	100.3 mm (3.9 in)	72 of 100 (Major)
Yates Ctr	United States	Record daily precipitation	116.8 mm (4.6 in)	71 of 100 (Major)
Ukiah	United States	Record daily precipitation	53.6 mm (2.1 in)	70 of 100 (Major)
Santa Rosa	United States	Record daily precipitation	71.1 mm (2.8 in)	68 of 100 (Major)
Ft Ross	United States	Record daily precipitation	63.5 mm (2.5 in)	65 of 100 (Major)
Healdsburg #2	United States	Record daily precipitation	60.7 mm (2.4 in)	63 of 100 (Major)
Stockton AP	United States	Record daily precipitation	42.2 mm (1.7 in)	63 of 100 (Major)
Woolners Arm	Australia	Record daily precipitation	77.2 mm (3.0 in)	61 of 100 (Major)
San Jose	United States	Record daily precipitation	41.1 mm (1.6 in)	60 of 100 (Major)
Angwin Pacific Union College	United States	Record daily precipitation	49.5 mm (1.9 in)	59 of 100 (Notable)
Sonoma	United States	Record daily precipitation	41.7 mm (1.6 in)	59 of 100 (Notable)
Covelo	United States	Record daily precipitation	38.4 mm (1.5 in)	57 of 100 (Notable)
Sacramento AP ASOS	United States	Record daily precipitation	34.3 mm (1.4 in)	57 of 100 (Notable)
Occidental	United States	Record daily precipitation	81.3 mm (3.2 in)	56 of 100 (Notable)
Atwood	United States	Record daily precipitation	64.8 mm (2.6 in)	56 of 100 (Notable)
Walnut 4S	United States	Record daily precipitation	110.2 mm (4.3 in)	56 of 100 (Notable)
Sacramento 5 ESE	United States	Record daily precipitation	39.6 mm (1.6 in)	55 of 100 (Notable)
Harrison Gulch Rs	United States	Record daily precipitation	50.3 mm (2.0 in)	54 of 100 (Notable)
Hayfork 2 W	United States	Record daily precipitation	43.2 mm (1.7 in)	54 of 100 (Notable)
Kentfield	United States	Record daily precipitation	80.0 mm (3.1 in)	54 of 100 (Notable)
Ukiah 4 WSW	United States	Record daily precipitation	53.3 mm (2.1 in)	54 of 100 (Notable)
Upper San Leandro Filters	United States	Record daily precipitation	37.1 mm (1.5 in)	54 of 100 (Notable)
Collinsville Post Office	Australia	Record daily precipitation	58.7 mm (2.3 in)	53 of 100 (Notable)
Mineral	United States	Record daily precipitation	35.3 mm (1.4 in)	53 of 100 (Notable)
Belington	United States	Record daily precipitation	53.3 mm (2.1 in)	53 of 100 (Notable)
Home Hill Fifteen A St	Australia	Record daily precipitation	83.2 mm (3.3 in)	52 of 100 (Notable)
Orleans	United States	Record daily precipitation	38.1 mm (1.5 in)	52 of 100 (Notable)
San Francisco Oceanside	United States	Record daily precipitation	29.7 mm (1.2 in)	52 of 100 (Notable)
Big Bar 4 E	United States	Record daily precipitation	35.6 mm (1.4 in)	51 of 100 (Notable)
Bridgeville 4 NNW	United States	Record daily precipitation	52.1 mm (2.1 in)	50 of 100 (Notable)
Calistoga	United States	Record daily precipitation	50.3 mm (2.0 in)	50 of 100 (Notable)
Colgate Powerhouse	United States	Record daily precipitation	25.7 mm (1.0 in)	50 of 100 (Notable)
Vero Beach Intl AP	United States	Record daily precipitation	67.8 mm (2.7 in)	50 of 100 (Notable)
Richmond	United States	Record daily precipitation	28.7 mm (1.1 in)	49 of 100 (Notable)
Kalamia Estate	Australia	Record daily precipitation	72.2 mm (2.8 in)	48 of 100 (Notable)
Lethebrook	Australia	Record daily precipitation	95.0 mm (3.7 in)	48 of 100 (Notable)
Verma	Norway	Record snow depth	30.0 cm (11.8 in)	48 of 100 (Notable)
Fayetteville Exp STN	United States	Record daily precipitation	62.7 mm (2.5 in)	48 of 100 (Notable)
Barnganal Blue Mountain	Australia	Record daily precipitation	70.0 mm (2.8 in)	47 of 100 (Notable)
Santa Cruz	United States	Record daily precipitation	27.9 mm (1.1 in)	47 of 100 (Notable)
Moffett Fed Airfield	United States	Record daily precipitation	25.4 mm (1.0 in)	47 of 100 (Notable)
Pandanus Ck Forest 658	Australia	Record daily precipitation	105.0 mm (4.1 in)	45 of 100 (Notable)
Whiskeytown Rsvr	United States	Record daily precipitation	53.6 mm (2.1 in)	45 of 100 (Notable)
Ozark Beach 2 NNE	United States	Record daily precipitation	70.9 mm (2.8 in)	45 of 100 (Notable)
Calen Post Office	Australia	Record daily precipitation	104.0 mm (4.1 in)	43 of 100 (Notable)
Standish Hickey Sp	United States	Record daily precipitation	88.9 mm (3.5 in)	43 of 100 (Notable)
Weaverville	United States	Record daily precipitation	53.6 mm (2.1 in)	43 of 100 (Notable)
Willows 6 W	United States	Record daily precipitation	25.4 mm (1.0 in)	43 of 100 (Notable)
Pittsburg	United States	Record daily precipitation	87.4 mm (3.4 in)	43 of 100 (Notable)
Mackay M.O	Australia	Record daily precipitation	96.0 mm (3.8 in)	42 of 100 (Notable)
Mather	United States	Record daily precipitation	36.8 mm (1.4 in)	42 of 100 (Notable)
Crystal Springs Exp STN	United States	Record high minimum temperature	24.4 C (75.9 F)	42 of 100 (Notable)
Lakeland Linder Rgnl AP	United States	Record daily precipitation	73.4 mm (2.9 in)	42 of 100 (Notable)
Matfield Green	United States	Record daily precipitation	99.1 mm (3.9 in)	41 of 100 (Notable)
Stratton	United States	Record daily precipitation	57.2 mm (2.3 in)	41 of 100 (Notable)
Tierawoomba	Australia	Record daily precipitation	40.1 mm (1.6 in)	40 of 100 (Notable)
Nicosia	Cyprus	Record high maximum temperature	39.4 C (102.9 F)	40 of 100 (Notable)
Paradise	United States	Record daily precipitation	35.6 mm (1.4 in)	40 of 100 (Notable)
San Gregorio 2 SE	United States	Record daily precipitation	26.7 mm (1.1 in)	40 of 100 (Notable)

Counts by Type and Timescale

804 records

Records set or tied on 27 May 1990 by type: Highest daily maximum 98, Lowest daily maximum 87, Highest daily minimum 135, Lowest daily minimum 136, Heaviest daily rainfall 342, Deepest snow cover 6.

Records on 27 May 1990 by type
Record type	Records
Highest daily maximum	98
Lowest daily maximum	87
Highest daily minimum	135
Lowest daily minimum	136
Heaviest daily rainfall	342
Heaviest daily snowfall	0
Deepest snow cover	6

Records on 27 May 1990 by timescale: all-time 2, monthly 45, daily 757.

How Much Records Were Beaten By

654 broken records

Margins by which the 654 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 300.0. Ties are not counted.

Top 20 by Significance

27 May 1990

Top 20 records on 27 May 1990 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 May 1990	San Rafael-Civic Ctr, US	daily rain	50.5 mm (2.0 in)	36.8 mm (1.4 in)	95 years	77 of 100 (Major)
27 May 1990	Healdsburg, US	monthly rain	100.3 mm (3.9 in)	27.1 mm (1.1 in)	84 years	72 of 100 (Major)
27 May 1990	Yates Ctr, US	daily rain	116.8 mm (4.6 in)	69.0 mm (2.7 in)	73 years	71 of 100 (Major)
27 May 1990	Ukiah, US	monthly rain	53.6 mm (2.1 in)	20.6 mm (0.8 in)	65 years	70 of 100 (Major)
27 May 1990	Santa Rosa, US	monthly rain	71.1 mm (2.8 in)	22.8 mm (0.9 in)	65 years	68 of 100 (Major)
27 May 1990	Ft Ross, US	daily rain	63.5 mm (2.5 in)	36.3 mm (1.4 in)	84 years	65 of 100 (Major)
27 May 1990	Healdsburg #2, US	monthly rain	60.7 mm (2.4 in)	32.5 mm (1.3 in)	33 years	63 of 100 (Major)
27 May 1990	Stockton AP, US	monthly rain	42.2 mm (1.7 in)	23.7 mm (0.9 in)	32 years	63 of 100 (Major)
27 May 1990	Woolners Arm, AU	daily rain	77.2 mm (3.0 in)	60.9 mm (2.4 in)	52 years	61 of 100 (Major)
27 May 1990	San Jose, US	monthly rain	41.1 mm (1.6 in)	9.6 mm (0.38 in)	75 years	60 of 100 (Major)
27 May 1990	Angwin Pacific Union College, US	daily rain	49.5 mm (1.9 in)	41.9 mm (1.6 in)	47 years	59 of 100 (Notable)
27 May 1990	Sonoma, US	monthly rain	41.7 mm (1.6 in)	9.7 mm (0.38 in)	85 years	59 of 100 (Notable)
27 May 1990	Covelo, US	daily rain	38.4 mm (1.5 in)	31.0 mm (1.2 in)	28 years	57 of 100 (Notable)
27 May 1990	Sacramento AP ASOS, US	daily rain	34.3 mm (1.4 in)	34.3 mm (1.4 in)	41 years	57 of 100 (Notable)
27 May 1990	Occidental, US	daily rain	81.3 mm (3.2 in)	69.4 mm (2.7 in)	43 years	56 of 100 (Notable)
27 May 1990	Atwood, US	daily rain	64.8 mm (2.6 in)	36.1 mm (1.4 in)	55 years	56 of 100 (Notable)
27 May 1990	Walnut 4S, US	daily rain	110.2 mm (4.3 in)	59.4 mm (2.3 in)	27 years	56 of 100 (Notable)
27 May 1990	Sacramento 5 ESE, US	daily rain	39.6 mm (1.6 in)	13.7 mm (0.5 in)	84 years	55 of 100 (Notable)
27 May 1990	Harrison Gulch Rs, US	monthly rain	50.3 mm (2.0 in)	20.1 mm (0.8 in)	30 years	54 of 100 (Notable)
27 May 1990	Hayfork 2 W, US	monthly rain	43.2 mm (1.7 in)	11.7 mm (0.5 in)	57 years	54 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 1990

Records set or tied on this calendar date in each year from 1797 to 1990. 1990 had 804 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 1990-05-27: 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 50	636
50 to 100	16
100 to 150	1
150 to 200	0
200 to 250	0
250 to 300	1