Weather Records on 28 May 1966

284 weather records were set or tied worldwide on 28 May 1966. Highest significance: Mossoro, BR.

Key Facts for 28 May 1966

On 28 May 1966, 284 weather records were set or tied at long-record stations worldwide.
92 were record highs and 80 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 12 monthly and 272 daily.
Mossoro set a monthly record daily precipitation of 127.4 mm (5.0 in) on 28 May 1966.
Across 161 earlier years (1794 to 2026) the same calendar date averaged 443 records.

Record Map

284 stations

284 station records on 28 May 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 28 May 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mossoro	Brazil	Record daily precipitation	127.4 mm (5.0 in)	62 of 100 (Major)
Chester 1 SE	United States	Record daily precipitation	153.9 mm (6.1 in)	61 of 100 (Major)
Caico	Brazil	Record daily precipitation	65.0 mm (2.6 in)	52 of 100 (Notable)
Springfield	Canada	Record daily precipitation	53.1 mm (2.1 in)	51 of 100 (Notable)
Rio Formoso	Brazil	Record daily precipitation	160.5 mm (6.3 in)	50 of 100 (Notable)
Columbia 2SSE	United States	Record daily precipitation	64.0 mm (2.5 in)	49 of 100 (Notable)
Cidra 1 E	Puerto Rico [United States]	Record daily precipitation	98.6 mm (3.9 in)	45 of 100 (Notable)
Hyannis	United States	Record daily precipitation	92.2 mm (3.6 in)	45 of 100 (Notable)
Florania	Brazil	Record daily precipitation	54.8 mm (2.2 in)	43 of 100 (Notable)
Cheljabinsk-Balandi	Russia	Record daily precipitation	28.7 mm (1.1 in)	43 of 100 (Notable)
Visby_Flygplats	Sweden	Record daily precipitation	28.0 mm (1.1 in)	43 of 100 (Notable)
Penedo	Brazil	Record daily precipitation	79.0 mm (3.1 in)	42 of 100 (Notable)
Japaratuba	Brazil	Record daily precipitation	88.2 mm (3.5 in)	42 of 100 (Notable)
Annapolis Royal	Canada	Record daily precipitation	66.8 mm (2.6 in)	41 of 100 (Notable)
Santuck	United States	Record daily precipitation	114.3 mm (4.5 in)	40 of 100 (Notable)
Acude Tucunduba	Brazil	Record daily precipitation	45.4 mm (1.8 in)	39 of 100 (Notable)
Salvador	Brazil	Record daily precipitation	107.9 mm (4.2 in)	37 of 100 (Notable)
Knapp 2 SW	United States	Record daily precipitation	48.3 mm (1.9 in)	35 of 100 (Notable)
Sonnblick	Austria	Record low maximum temperature	-9.0 C (15.8 F)	34 of 100 (Routine)
Gotska Sandon	Sweden	Record daily precipitation	30.3 mm (1.2 in)	33 of 100 (Routine)
Estancia	Brazil	Record daily precipitation	100.7 mm (4.0 in)	32 of 100 (Routine)
Juana Diaz Camp	Puerto Rico [United States]	Record daily precipitation	69.6 mm (2.7 in)	32 of 100 (Routine)
Brockton	United States	Record daily precipitation	39.1 mm (1.5 in)	32 of 100 (Routine)
Halflong Obsy	India	Record daily precipitation	129.6 mm (5.1 in)	31 of 100 (Routine)
Belleplain STN Forest	United States	Record daily precipitation	31.2 mm (1.2 in)	31 of 100 (Routine)
Calhoun Falls	United States	Record daily precipitation	51.3 mm (2.0 in)	31 of 100 (Routine)
Winthrop UNIV	United States	Record daily precipitation	51.3 mm (2.0 in)	31 of 100 (Routine)
Ponce 4 E	Puerto Rico [United States]	Record low maximum temperature	26.7 C (80.1 F)	30 of 100 (Routine)
Windsor	United States	Record high maximum temperature	30.6 C (87.1 F)	30 of 100 (Routine)
Robe Comparison	Australia	Record high minimum temperature	14.4 C (57.9 F)	29 of 100 (Routine)
Kyelong Obsy	India	Record daily precipitation	33.0 mm (1.3 in)	29 of 100 (Routine)
Aguirre	Puerto Rico [United States]	Record daily precipitation	48.5 mm (1.9 in)	29 of 100 (Routine)
Kirov	Russia	Record high minimum temperature	15.9 C (60.6 F)	29 of 100 (Routine)
Mocksville 5SE	United States	Record daily precipitation	59.2 mm (2.3 in)	29 of 100 (Routine)
Concrete Ppl Fish STN	United States	Record low minimum temperature	1.1 C (34.0 F)	29 of 100 (Routine)
Tambe (Itambe)	Brazil	Record daily precipitation	104.0 mm (4.1 in)	28 of 100 (Routine)
Louisburg	United States	Record daily precipitation	55.9 mm (2.2 in)	28 of 100 (Routine)
Kohala Mis 175.1	United States	Record low minimum temperature	17.2 C (63.0 F)	28 of 100 (Routine)
Kazan	Russia	Record high maximum temperature	31.4 C (88.5 F)	27 of 100 (Routine)
Ben Lomond	South Africa	Record daily precipitation	50.0 mm (2.0 in)	27 of 100 (Routine)
Atalaia	Brazil	Record daily precipitation	96.5 mm (3.8 in)	26 of 100 (Routine)
Kentville Cda	Canada	Record daily precipitation	29.0 mm (1.1 in)	26 of 100 (Routine)
Acude Sao Vicente	Brazil	Record daily precipitation	44.3 mm (1.7 in)	25 of 100 (Routine)
Agassiz Cda	Canada	Record low minimum temperature	1.7 C (35.1 F)	25 of 100 (Routine)
St Margaret's Bay	Canada	Record daily precipitation	49.5 mm (1.9 in)	25 of 100 (Routine)
Rangia	India	Record daily precipitation	69.5 mm (2.7 in)	25 of 100 (Routine)
Fife Lake 4 SW	United States	Record low minimum temperature	-12.2 C (10.0 F)	25 of 100 (Routine)
Gravata	Brazil	Record daily precipitation	34.2 mm (1.3 in)	24 of 100 (Routine)
Hughton	Canada	Record high minimum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
Moosonee Ua	Canada	Record daily snowfall	12.7 cm (5.0 in)	24 of 100 (Routine)
Cidra 1 E	Puerto Rico [United States]	Record low maximum temperature	22.8 C (73.0 F)	24 of 100 (Routine)
Kirov	Russia	Record high maximum temperature	29.0 C (84.2 F)	24 of 100 (Routine)
Marietta Lock 1	United States	Record daily precipitation	30.5 mm (1.2 in)	24 of 100 (Routine)
Newport News Press Bld	United States	Record daily precipitation	34.3 mm (1.4 in)	24 of 100 (Routine)
Low Head (Comparison)	Australia	Record high minimum temperature	12.5 C (54.5 F)	23 of 100 (Routine)
Kazan	Russia	Record high minimum temperature	17.9 C (64.2 F)	23 of 100 (Routine)
Coffee Springs 2 NW	United States	Record daily precipitation	29.2 mm (1.1 in)	23 of 100 (Routine)
Hartwell	United States	Record daily precipitation	39.6 mm (1.6 in)	23 of 100 (Routine)
Mc Minnville	United States	Record low minimum temperature	-0.6 C (30.9 F)	23 of 100 (Routine)
Oujda	Morocco	Record high minimum temperature	17.0 C (62.6 F)	22 of 100 (Routine)

Counts by Type and Timescale

284 records

Records set or tied on 28 May 1966 by type: Highest daily maximum 49, Lowest daily maximum 23, Highest daily minimum 43, Lowest daily minimum 57, Heaviest daily rainfall 110, Heaviest daily snowfall 2.

Records on 28 May 1966 by type
Record type	Records
Highest daily maximum	49
Lowest daily maximum	23
Highest daily minimum	43
Lowest daily minimum	57
Heaviest daily rainfall	110
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 28 May 1966 by timescale: all-time 0, monthly 12, daily 272.

How Much Records Were Beaten By

231 broken records

Margins by which the 231 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 91.7. Ties are not counted.

Top 20 by Significance

28 May 1966

Top 20 records on 28 May 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 May 1966	Mossoro, BR	monthly rain	127.4 mm (5.0 in)	42.4 mm (1.7 in)	49 years	62 of 100 (Major)
28 May 1966	Chester 1 SE, US	monthly rain	153.9 mm (6.1 in)	91.7 mm (3.6 in)	25 years	61 of 100 (Major)
28 May 1966	Caico, BR	daily rain	65.0 mm (2.6 in)	60.4 mm (2.4 in)	25 years	52 of 100 (Notable)
28 May 1966	Springfield, CA	daily rain	53.1 mm (2.1 in)	36.3 mm (1.4 in)	32 years	51 of 100 (Notable)
28 May 1966	Rio Formoso, BR	daily rain	160.5 mm (6.3 in)	86.3 mm (3.4 in)	25 years	50 of 100 (Notable)
28 May 1966	Columbia 2SSE, US	daily rain	64.0 mm (2.5 in)	39.4 mm (1.6 in)	32 years	49 of 100 (Notable)
28 May 1966	Cidra 1 E, PR	daily rain	98.6 mm (3.9 in)	40.2 mm (1.6 in)	61 years	45 of 100 (Notable)
28 May 1966	Hyannis, US	monthly rain	92.2 mm (3.6 in)	10.9 mm (0.4 in)	65 years	45 of 100 (Notable)
28 May 1966	Florania, BR	daily rain	54.8 mm (2.2 in)	42.3 mm (1.7 in)	20 years	43 of 100 (Notable)
28 May 1966	Cheljabinsk-Balandi, RU	daily rain	28.7 mm (1.1 in)	10.7 mm (0.4 in)	37 years	43 of 100 (Notable)
28 May 1966	Visby_Flygplats, SE	daily rain	28.0 mm (1.1 in)	13.2 mm (0.5 in)	5 years	43 of 100 (Notable)
28 May 1966	Penedo, BR	daily rain	79.0 mm (3.1 in)	56.0 mm (2.2 in)	29 years	42 of 100 (Notable)
28 May 1966	Japaratuba, BR	daily rain	88.2 mm (3.5 in)	42.1 mm (1.7 in)	36 years	42 of 100 (Notable)
28 May 1966	Annapolis Royal, CA	monthly rain	66.8 mm (2.6 in)	15.5 mm (0.6 in)	19 years	41 of 100 (Notable)
28 May 1966	Santuck, US	monthly rain	114.3 mm (4.5 in)	26.7 mm (1.1 in)	6 years	40 of 100 (Notable)
28 May 1966	Acude Tucunduba, BR	daily rain	45.4 mm (1.8 in)	30.9 mm (1.2 in)	48 years	39 of 100 (Notable)
28 May 1966	Salvador, BR	daily rain	107.9 mm (4.2 in)	39.9 mm (1.6 in)	31 years	37 of 100 (Notable)
28 May 1966	Knapp 2 SW, US	daily rain	48.3 mm (1.9 in)	33.8 mm (1.3 in)	33 years	35 of 100 (Notable)
28 May 1966	Sonnblick, AT	daily low max	-9.0 C (15.8 F)	2.0 C (3.6 F)	72 years	34 of 100 (Routine)
28 May 1966	Gotska Sandon, SE	monthly rain	30.3 mm (1.2 in)	3.0 mm (0.12 in)	29 years	33 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

1794 to 1966

Records set or tied on this calendar date in each year from 1794 to 1966. 1966 had 284 records.

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

Records on 05-28 in each year
Year	Records
1794	1
1797	1
1811	1
1824	1
1832	1
1836	5
1840	1
1841	1
1847	2
1848	1
1851	2
1857	1
1858	1
1863	1
1865	1
1868	4
1869	1
1876	1
1879	2
1880	2
1884	3
1885	2
1887	1
1888	3
1889	3
1890	3
1891	2
1892	9
1893	2
1894	9
1895	1
1896	5
1897	6
1898	1
1899	6
1900	4
1901	6
1902	12
1903	9
1904	6
1905	14
1906	31
1907	36
1908	26
1909	7
1910	18
1911	42
1912	19
1913	28
1914	58
1915	27
1916	24
1917	36
1918	43
1919	43
1920	33
1921	87
1922	80
1923	72
1924	109
1925	122
1926	143
1927	301
1928	150
1929	355
1930	131
1931	574
1932	171
1933	212
1934	537
1935	186
1936	337
1937	212
1938	285
1939	433
1940	217
1941	711
1942	279
1943	238
1944	330
1945	331
1946	413
1947	1,049
1948	333
1949	321
1950	276
1951	503
1952	314
1953	392
1954	382
1955	413
1956	456
1957	272
1958	792
1959	557
1960	431
1961	1,026
1962	859
1963	368
1964	394
1965	536
1966	284
1967	350
1968	610
1969	863
1970	310
1971	767
1972	575
1973	834
1974	585
1975	397
1976	914
1977	826
1978	802
1979	521
1980	808
1981	711
1982	1,204
1983	1,666
1984	1,357
1985	914
1986	591
1987	1,139
1988	806
1989	817
1990	1,024
1991	1,647
1992	1,610
1993	870
1994	981
1995	1,078
1996	1,438
1997	1,108
1998	1,043
1999	952
2000	1,229
2001	1,024
2002	612
2003	1,049
2004	875
2005	1,032
2006	1,566
2007	1,084
2008	902
2009	733
2010	937
2011	1,188
2012	1,237
2013	541
2014	781
2015	487
2016	625
2017	710
2018	1,348
2019	973
2020	875
2021	537
2022	476
2023	445
2024	907
2025	663
2026	1,053

Download the Data

Data for records on 1966-05-28: 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	206
20 to 40	13
40 to 60	8
60 to 80	2
80 to 100	2