Weather Records on 10 May 1966

1,290 weather records were set or tied worldwide on 10 May 1966. Highest significance: Iguatu, BR.

Key Facts for 10 May 1966

On 10 May 1966, 1,290 weather records were set or tied at long-record stations worldwide.
60 were record highs and 954 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 260 monthly and 1,027 daily.
Iguatu set a monthly record daily precipitation of 145.6 mm (5.7 in) on 10 May 1966.
Across 163 earlier years (1805 to 2026) the same calendar date averaged 435 records.

Record Map

1,290 stations

1,290 station records on 10 May 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 10 May 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Iguatu	Brazil	Record daily precipitation	145.6 mm (5.7 in)	68 of 100 (Major)
Suassurana	Brazil	Record daily precipitation	165.4 mm (6.5 in)	58 of 100 (Notable)
Riverdale	United States	Record daily precipitation	34.8 mm (1.4 in)	53 of 100 (Notable)
Bedford 2 SE	United States	Record daily precipitation	50.5 mm (2.0 in)	53 of 100 (Notable)
Barrage Mitis	Canada	Record daily snowfall	14.2 cm (5.6 in)	52 of 100 (Notable)
Bathurst	Canada	Record daily snowfall	7.6 cm (3.0 in)	51 of 100 (Notable)
Malad	United States	Record daily precipitation	32.0 mm (1.3 in)	48 of 100 (Notable)
Bethlehem	United States	Record daily snowfall	10.2 cm (4.0 in)	48 of 100 (Notable)
Toledo Blade	United States	Record low minimum temperature	-2.2 C (28.0 F)	48 of 100 (Notable)
Ogden Pioneer Ph	United States	Record daily precipitation	37.3 mm (1.5 in)	48 of 100 (Notable)
York Pond	United States	Record daily snowfall	16.5 cm (6.5 in)	46 of 100 (Notable)
Garland 1 NE	United States	Record daily precipitation	25.4 mm (1.0 in)	46 of 100 (Notable)
Uxbridge	Australia	Record daily precipitation	25.9 mm (1.0 in)	43 of 100 (Notable)
Bloomington Normal	United States	Record low minimum temperature	-6.1 C (21.0 F)	43 of 100 (Notable)
Mt Sterling	United States	Record low minimum temperature	-3.3 C (26.1 F)	42 of 100 (Notable)
Addison	United States	Record daily snowfall	7.6 cm (3.0 in)	42 of 100 (Notable)
Hillsboro	United States	Record low minimum temperature	-5.0 C (23.0 F)	42 of 100 (Notable)
Cooperstown	United States	Record daily snowfall	7.6 cm (3.0 in)	41 of 100 (Notable)
Albion	United States	Record low minimum temperature	-1.1 C (30.0 F)	40 of 100 (Notable)
Hillsdale	United States	Record low minimum temperature	-7.2 C (19.0 F)	40 of 100 (Notable)
Griffiss AFB	United States	Record low minimum temperature	-5.6 C (21.9 F)	40 of 100 (Notable)
Pierson	Canada	Record daily snowfall	7.6 cm (3.0 in)	39 of 100 (Notable)
Rockville	United States	Record low minimum temperature	-2.8 C (27.0 F)	39 of 100 (Notable)
Charlotteburg Rsvr	United States	Record low maximum temperature	4.4 C (39.9 F)	39 of 100 (Notable)
Delaware	United States	Record low minimum temperature	-5.0 C (23.0 F)	39 of 100 (Notable)
Lawrenceville 2 S	United States	Record low minimum temperature	-8.9 C (16.0 F)	39 of 100 (Notable)
Bayfield 6 N	United States	Record low minimum temperature	-6.7 C (19.9 F)	39 of 100 (Notable)
Flamengo	Brazil	Record daily precipitation	60.2 mm (2.4 in)	38 of 100 (Notable)
Huntingdon	Canada	Record low minimum temperature	-3.3 C (26.1 F)	38 of 100 (Notable)
Richmond Wtr Wks	United States	Record low minimum temperature	-5.0 C (23.0 F)	38 of 100 (Notable)
Ludington 4 SE	United States	Record low minimum temperature	-5.6 C (21.9 F)	38 of 100 (Notable)
Addison	United States	Record low minimum temperature	-7.8 C (18.0 F)	38 of 100 (Notable)
Ithaca Cornell UNIV	United States	Record snow depth	10.2 cm (4.0 in)	38 of 100 (Notable)
Weston	United States	Record low maximum temperature	6.1 C (43.0 F)	38 of 100 (Notable)
Manitowoc	United States	Record low minimum temperature	-5.0 C (23.0 F)	38 of 100 (Notable)
Carlinville	United States	Record low minimum temperature	-3.3 C (26.1 F)	37 of 100 (Notable)
Danville	United States	Record low minimum temperature	-3.9 C (25.0 F)	37 of 100 (Notable)
Galva	United States	Record low minimum temperature	-4.4 C (24.1 F)	37 of 100 (Notable)
Jacksonville 2E	United States	Record low minimum temperature	-3.3 C (26.1 F)	37 of 100 (Notable)
W Lafayette 6 NW	United States	Record low minimum temperature	-3.3 C (26.1 F)	37 of 100 (Notable)
Winamac 2SSE	United States	Record low minimum temperature	-5.6 C (21.9 F)	37 of 100 (Notable)
Bay City	United States	Record low minimum temperature	-5.6 C (21.9 F)	37 of 100 (Notable)
Circleville	United States	Record low minimum temperature	-3.9 C (25.0 F)	37 of 100 (Notable)
Waverly	United States	Record low minimum temperature	-5.6 C (21.9 F)	37 of 100 (Notable)
State College	United States	Record low maximum temperature	2.8 C (37.0 F)	37 of 100 (Notable)
Alpine	United States	Record daily precipitation	32.0 mm (1.3 in)	37 of 100 (Notable)
Griggsville	United States	Record low minimum temperature	-2.2 C (28.0 F)	36 of 100 (Notable)
Minonk	United States	Record low minimum temperature	-4.4 C (24.1 F)	36 of 100 (Notable)
Delphi 2 N	United States	Record low minimum temperature	-3.9 C (25.0 F)	36 of 100 (Notable)
Washington 1 W	United States	Record low minimum temperature	-2.2 C (28.0 F)	36 of 100 (Notable)
Fremont	United States	Record low minimum temperature	-2.8 C (27.0 F)	36 of 100 (Notable)
Wooster Exp STN	United States	Record low minimum temperature	-4.4 C (24.1 F)	36 of 100 (Notable)
Franklin	United States	Record low minimum temperature	-6.7 C (19.9 F)	36 of 100 (Notable)
Lock Haven	United States	Record low maximum temperature	3.9 C (39.0 F)	36 of 100 (Notable)
Clear Lake	United States	Record daily snowfall	7.6 cm (3.0 in)	36 of 100 (Notable)
Maracaja	Brazil	Record daily precipitation	75.6 mm (3.0 in)	35 of 100 (Notable)
St Andrews	Canada	Record low maximum temperature	6.1 C (43.0 F)	35 of 100 (Notable)
Middletown 2 NW	United States	Record low minimum temperature	-1.7 C (28.9 F)	35 of 100 (Notable)
Bellefontaine	United States	Record low minimum temperature	-5.0 C (23.0 F)	35 of 100 (Notable)
Defiance	United States	Record low minimum temperature	-4.4 C (24.1 F)	35 of 100 (Notable)

Counts by Type and Timescale

1,290 records

Records set or tied on 10 May 1966 by type: Highest daily maximum 11, Lowest daily maximum 331, Highest daily minimum 49, Lowest daily minimum 623, Heaviest daily rainfall 210, Heaviest daily snowfall 54, Deepest snow cover 12.

Records on 10 May 1966 by type
Record type	Records
Highest daily maximum	11
Lowest daily maximum	331
Highest daily minimum	49
Lowest daily minimum	623
Heaviest daily rainfall	210
Heaviest daily snowfall	54
Deepest snow cover	12

Records on 10 May 1966 by timescale: all-time 3, monthly 260, daily 1,027.

How Much Records Were Beaten By

1,000 broken records

Margins by which the 1,000 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 165.0. Ties are not counted.

Top 20 by Significance

10 May 1966

Top 20 records on 10 May 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 May 1966	Iguatu, BR	monthly rain	145.6 mm (5.7 in)	59.6 mm (2.3 in)	44 years	68 of 100 (Major)
10 May 1966	Suassurana, BR	all-time rain	165.4 mm (6.5 in)	37.4 mm (1.5 in)	32 years	58 of 100 (Notable)
10 May 1966	Riverdale, US	daily rain	34.8 mm (1.4 in)	25.1 mm (1.0 in)	47 years	53 of 100 (Notable)
10 May 1966	Bedford 2 SE, US	all-time rain	50.5 mm (2.0 in)	11.9 mm (0.5 in)	17 years	53 of 100 (Notable)
10 May 1966	Barrage Mitis, CA	daily snowfall	14.2 cm (5.6 in)	14.2 cm (5.6 in)	39 years	52 of 100 (Notable)
10 May 1966	Bathurst, CA	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	92 years	51 of 100 (Notable)
10 May 1966	Malad, US	daily rain	32.0 mm (1.3 in)	24.1 mm (0.9 in)	9 years	48 of 100 (Notable)
10 May 1966	Bethlehem, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	70 years	48 of 100 (Notable)
10 May 1966	Toledo Blade, US	monthly low min	-2.2 C (28.0 F)	1.1 C (2.0 F)	90 years	48 of 100 (Notable)
10 May 1966	Ogden Pioneer Ph, US	daily rain	37.3 mm (1.5 in)	33.2 mm (1.3 in)	9 years	48 of 100 (Notable)
10 May 1966	York Pond, US	daily snowfall	16.5 cm (6.5 in)	16.5 cm (6.5 in)	35 years	46 of 100 (Notable)
10 May 1966	Garland 1 NE, US	daily rain	25.4 mm (1.0 in)	19.0 mm (0.7 in)	40 years	46 of 100 (Notable)
10 May 1966	Uxbridge, AU	daily rain	25.9 mm (1.0 in)	13.7 mm (0.5 in)	51 years	43 of 100 (Notable)
10 May 1966	Bloomington Normal, US	monthly low min	-6.1 C (21.0 F)	2.8 C (5.0 F)	70 years	43 of 100 (Notable)
10 May 1966	Mt Sterling, US	monthly low min	-3.3 C (26.1 F)	2.2 C (4.0 F)	70 years	42 of 100 (Notable)
10 May 1966	Addison, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	67 years	42 of 100 (Notable)
10 May 1966	Hillsboro, US	monthly low min	-5.0 C (23.0 F)	2.2 C (4.0 F)	70 years	42 of 100 (Notable)
10 May 1966	Cooperstown, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	65 years	41 of 100 (Notable)
10 May 1966	Albion, US	monthly low min	-1.1 C (30.0 F)	1.1 C (2.0 F)	70 years	40 of 100 (Notable)
10 May 1966	Hillsdale, US	monthly low min	-7.2 C (19.0 F)	2.8 C (5.0 F)	63 years	40 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

1805 to 1966

Records set or tied on this calendar date in each year from 1805 to 1966. 1966 had 1,290 records.

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

Records on 05-10 in each year
Year	Records
1805	1
1814	2
1832	1
1834	1
1836	4
1838	1
1843	1
1846	1
1848	1
1855	2
1858	1
1860	1
1861	2
1867	3
1868	1
1869	1
1872	1
1874	4
1876	1
1878	1
1879	2
1880	3
1881	3
1883	1
1884	2
1885	2
1886	1
1887	1
1888	2
1889	4
1890	2
1891	2
1893	1
1895	4
1896	6
1897	4
1898	5
1900	4
1901	6
1902	18
1903	6
1904	7
1905	21
1906	42
1907	33
1908	10
1909	17
1910	21
1911	55
1912	15
1913	23
1914	17
1915	18
1916	26
1917	23
1918	105
1919	145
1920	54
1921	143
1922	38
1923	291
1924	198
1925	163
1926	291
1927	296
1928	189
1929	102
1930	647
1931	277
1932	145
1933	516
1934	412
1935	200
1936	439
1937	148
1938	179
1939	179
1940	317
1941	257
1942	237
1943	482
1944	200
1945	646
1946	455
1947	820
1948	491
1949	492
1950	356
1951	281
1952	342
1953	627
1954	554
1955	272
1956	669
1957	374
1958	338
1959	192
1960	660
1961	722
1962	593
1963	951
1964	259
1965	413
1966	1,290
1967	932
1968	861
1969	325
1970	555
1971	416
1972	573
1973	429
1974	608
1975	448
1976	672
1977	1,075
1978	815
1979	1,927
1980	865
1981	1,213
1982	671
1983	753
1984	635
1985	925
1986	669
1987	1,270
1988	490
1989	1,365
1990	1,071
1991	854
1992	875
1993	1,056
1994	622
1995	1,129
1996	1,469
1997	1,215
1998	1,268
1999	1,299
2000	1,036
2001	842
2002	867
2003	1,688
2004	735
2005	761
2006	879
2007	815
2008	877
2009	651
2010	855
2011	1,288
2012	1,054
2013	635
2014	506
2015	943
2016	815
2017	702
2018	923
2019	1,254
2020	1,346
2021	635
2022	1,346
2023	359
2024	622
2025	1,094
2026	496

Download the Data

Data for records on 1966-05-10: 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 25	950
25 to 50	27
50 to 75	13
75 to 100	7
100 to 125	1
125 to 150	1
150 to 175	1