Weather Records on 10 April 1966

537 weather records were set or tied worldwide on 10 April 1966. Highest significance: Dumure, ZA.

Key Facts for 10 April 1966

On 10 April 1966, 537 weather records were set or tied at long-record stations worldwide.
97 were record highs and 164 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 21 monthly and 516 daily.
Dumure set a monthly record daily precipitation of 56.3 mm (2.2 in) on 10 April 1966.
Across 164 earlier years (1793 to 2026) the same calendar date averaged 466 records.

Record Map

537 stations

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

Weather records on 10 April 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dumure	South Africa	Record daily precipitation	56.3 mm (2.2 in)	57 of 100 (Notable)
Valemount	Canada	Record daily snowfall	30.5 cm (12.0 in)	55 of 100 (Notable)
Clear Lake	United States	Record daily snowfall	15.2 cm (6.0 in)	54 of 100 (Notable)
Quesnel	Canada	Record daily snowfall	5.1 cm (2.0 in)	49 of 100 (Notable)
Red Pass Junction	Canada	Record daily snowfall	33.8 cm (13.3 in)	48 of 100 (Notable)
Piranhas	Brazil	Record daily precipitation	56.2 mm (2.2 in)	46 of 100 (Notable)
Red Pass Junction	Canada	Record daily precipitation	33.8 mm (1.3 in)	46 of 100 (Notable)
Piranhas (Marechal Floriano)	Brazil	Record daily precipitation	53.5 mm (2.1 in)	45 of 100 (Notable)
Itaberaba	Brazil	Record daily precipitation	55.3 mm (2.2 in)	44 of 100 (Notable)
Aquidaba	Brazil	Record daily precipitation	45.5 mm (1.8 in)	43 of 100 (Notable)
Valemount	Canada	Record daily precipitation	30.5 mm (1.2 in)	42 of 100 (Notable)
Fort Vermilion Cda	Canada	Record daily snowfall	17.0 cm (6.7 in)	42 of 100 (Notable)
Wrangell AP	United States	Record low minimum temperature	-7.8 C (18.0 F)	42 of 100 (Notable)
Maracas	Brazil	Record daily precipitation	57.0 mm (2.2 in)	41 of 100 (Notable)
Spencer 1 N	United States	Record daily snowfall	7.6 cm (3.0 in)	41 of 100 (Notable)
Barkerville	Canada	Record daily snowfall	21.1 cm (8.3 in)	40 of 100 (Notable)
Fort Chipewyan	Canada	Record daily snowfall	12.2 cm (4.8 in)	40 of 100 (Notable)
Fall Rvr Mills	United States	Record daily precipitation	26.2 mm (1.0 in)	40 of 100 (Notable)
Happy Camp Rs	United States	Record daily precipitation	30.0 mm (1.2 in)	38 of 100 (Notable)
Sitka Magnetic Obsy	United States	Record low minimum temperature	-8.3 C (17.1 F)	38 of 100 (Notable)
Piacabucu	Brazil	Record daily precipitation	77.0 mm (3.0 in)	37 of 100 (Notable)
Pio IX (Patrocinio)	Brazil	Record daily precipitation	52.4 mm (2.1 in)	37 of 100 (Notable)
Britton	United States	Record daily snowfall	10.2 cm (4.0 in)	37 of 100 (Notable)
Big Creek	Canada	Record low maximum temperature	-7.8 C (18.0 F)	36 of 100 (Notable)
Elk Point	Canada	Record daily snowfall	11.4 cm (4.5 in)	36 of 100 (Notable)
Grenfell	Canada	Record daily snowfall	7.6 cm (3.0 in)	36 of 100 (Notable)
Barra da Estiva	Brazil	Record daily precipitation	51.0 mm (2.0 in)	35 of 100 (Notable)
Nossa Senhora da Gloria	Brazil	Record daily precipitation	33.0 mm (1.3 in)	35 of 100 (Notable)
Ouricuri	Brazil	Record daily precipitation	40.2 mm (1.6 in)	34 of 100 (Routine)
Allison	United States	Record daily snowfall	5.1 cm (2.0 in)	34 of 100 (Routine)
Napoleon	United States	Record daily snowfall	12.4 cm (4.9 in)	34 of 100 (Routine)
Ipswich	United States	Record daily snowfall	5.1 cm (2.0 in)	34 of 100 (Routine)
Sao Joao Do Cariri	Brazil	Record daily precipitation	45.2 mm (1.8 in)	33 of 100 (Routine)
Serrinha	Brazil	Record daily precipitation	87.0 mm (3.4 in)	33 of 100 (Routine)
New Hazelton	Canada	Record low maximum temperature	-3.3 C (26.1 F)	33 of 100 (Routine)
Fort St James	Canada	Record low maximum temperature	-10.0 C (14.0 F)	33 of 100 (Routine)
Fort St James	Canada	Record daily snowfall	10.2 cm (4.0 in)	33 of 100 (Routine)
Wrixum/Fohr	Germany	Record low maximum temperature	2.4 C (36.3 F)	33 of 100 (Routine)
Kadur	India	Record daily precipitation	35.6 mm (1.4 in)	33 of 100 (Routine)
Clanwilliam (Pol)	South Africa	Record daily precipitation	30.5 mm (1.2 in)	33 of 100 (Routine)
Kristianstad	Sweden	Record low maximum temperature	1.2 C (34.2 F)	33 of 100 (Routine)
Colgate Powerhouse	United States	Record daily precipitation	49.0 mm (1.9 in)	33 of 100 (Routine)
Redding Fire STN 2	United States	Record daily precipitation	77.2 mm (3.0 in)	33 of 100 (Routine)
Black Rock	United States	Record high minimum temperature	10.0 C (50.0 F)	33 of 100 (Routine)
Dumbleyung	Australia	Record daily precipitation	25.4 mm (1.0 in)	32 of 100 (Routine)
Ubaira (Areia)	Brazil	Record daily precipitation	35.5 mm (1.4 in)	32 of 100 (Routine)
Beaverlodge Cda	Canada	Record low maximum temperature	-15.0 C (5.0 F)	32 of 100 (Routine)
Big Creek	Canada	Record daily snowfall	12.7 cm (5.0 in)	31 of 100 (Routine)
Saskatoon Diefenbaker Int'l A	Canada	Record daily snowfall	5.1 cm (2.0 in)	31 of 100 (Routine)
Lillooet	Canada	Record daily snowfall	9.9 cm (3.9 in)	30 of 100 (Routine)
Crosby	United States	Record daily snowfall	10.2 cm (4.0 in)	30 of 100 (Routine)
Sisseton	United States	Record daily snowfall	9.1 cm (3.6 in)	30 of 100 (Routine)
Cicero Dantas	Brazil	Record daily precipitation	39.1 mm (1.5 in)	29 of 100 (Routine)
Bull Harbour	Canada	Record daily snowfall	6.1 cm (2.4 in)	29 of 100 (Routine)
Jasper	Canada	Record daily snowfall	11.4 cm (4.5 in)	29 of 100 (Routine)
Forest City 2 NNE	United States	Record daily snowfall	6.4 cm (2.5 in)	29 of 100 (Routine)
Windom	United States	Record daily snowfall	5.1 cm (2.0 in)	29 of 100 (Routine)
Annex Creek	United States	Record low minimum temperature	-7.8 C (18.0 F)	29 of 100 (Routine)
Wrangell AP	United States	Record low maximum temperature	-1.1 C (30.0 F)	29 of 100 (Routine)
Ketchikan AP	United States	Record low minimum temperature	-5.6 C (21.9 F)	29 of 100 (Routine)

Counts by Type and Timescale

537 records

Records set or tied on 10 April 1966 by type: Highest daily maximum 15, Lowest daily maximum 66, Highest daily minimum 82, Lowest daily minimum 98, Heaviest daily rainfall 206, Heaviest daily snowfall 56, Deepest snow cover 14.

Records on 10 April 1966 by type
Record type	Records
Highest daily maximum	15
Lowest daily maximum	66
Highest daily minimum	82
Lowest daily minimum	98
Heaviest daily rainfall	206
Heaviest daily snowfall	56
Deepest snow cover	14

Records on 10 April 1966 by timescale: all-time 0, monthly 21, daily 516.

How Much Records Were Beaten By

443 broken records

Margins by which the 443 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 313.0. Ties are not counted.

Top 20 by Significance

10 April 1966

Top 20 records on 10 April 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 April 1966	Dumure, ZA	monthly rain	56.3 mm (2.2 in)	26.3 mm (1.0 in)	12 years	57 of 100 (Notable)
10 April 1966	Valemount, CA	monthly snowfall	30.5 cm (12.0 in)	17.8 cm (7.0 in)	0 years	55 of 100 (Notable)
10 April 1966	Clear Lake, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	61 years	54 of 100 (Notable)
10 April 1966	Quesnel, CA	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	72 years	49 of 100 (Notable)
10 April 1966	Red Pass Junction, CA	daily snowfall	33.8 cm (13.3 in)	31.3 cm (12.3 in)	19 years	48 of 100 (Notable)
10 April 1966	Piranhas, BR	daily rain	56.2 mm (2.2 in)	38.7 mm (1.5 in)	12 years	46 of 100 (Notable)
10 April 1966	Red Pass Junction, CA	daily rain	33.8 mm (1.3 in)	28.2 mm (1.1 in)	11 years	46 of 100 (Notable)
10 April 1966	Piranhas (Marechal Floriano), BR	daily rain	53.5 mm (2.1 in)	42.1 mm (1.7 in)	20 years	45 of 100 (Notable)
10 April 1966	Itaberaba, BR	daily rain	55.3 mm (2.2 in)	41.7 mm (1.6 in)	32 years	44 of 100 (Notable)
10 April 1966	Aquidaba, BR	daily rain	45.5 mm (1.8 in)	27.5 mm (1.1 in)	40 years	43 of 100 (Notable)
10 April 1966	Valemount, CA	monthly rain	30.5 mm (1.2 in)	7.6 mm (0.30 in)	23 years	42 of 100 (Notable)
10 April 1966	Fort Vermilion Cda, CA	daily snowfall	17.0 cm (6.7 in)	10.9 cm (4.3 in)	56 years	42 of 100 (Notable)
10 April 1966	Wrangell AP, US	daily low min	-7.8 C (18.0 F)	6.1 C (11.0 F)	45 years	42 of 100 (Notable)
10 April 1966	Maracas, BR	daily rain	57.0 mm (2.2 in)	44.0 mm (1.7 in)	29 years	41 of 100 (Notable)
10 April 1966	Spencer 1 N, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	70 years	41 of 100 (Notable)
10 April 1966	Barkerville, CA	daily snowfall	21.1 cm (8.3 in)	5.9 cm (2.3 in)	75 years	40 of 100 (Notable)
10 April 1966	Fort Chipewyan, CA	daily snowfall	12.2 cm (4.8 in)	4.6 cm (1.8 in)	71 years	40 of 100 (Notable)
10 April 1966	Fall Rvr Mills, US	daily rain	26.2 mm (1.0 in)	14.3 mm (0.6 in)	40 years	40 of 100 (Notable)
10 April 1966	Happy Camp Rs, US	daily rain	30.0 mm (1.2 in)	18.6 mm (0.7 in)	47 years	38 of 100 (Notable)
10 April 1966	Sitka Magnetic Obsy, US	daily low min	-8.3 C (17.1 F)	4.4 C (7.9 F)	55 years	38 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

1793 to 1966

Records set or tied on this calendar date in each year from 1793 to 1966. 1966 had 537 records.

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

Records on 04-10 in each year
Year	Records
1793	1
1798	1
1805	1
1809	2
1812	3
1842	2
1844	1
1846	1
1847	1
1854	1
1863	2
1864	2
1865	2
1869	1
1872	1
1873	2
1875	2
1876	3
1877	2
1878	2
1879	1
1880	2
1882	1
1885	1
1886	1
1887	6
1888	1
1889	1
1890	4
1891	1
1892	4
1893	3
1894	5
1895	5
1896	4
1897	3
1898	6
1899	4
1900	8
1901	4
1902	4
1903	10
1904	12
1905	21
1906	24
1907	13
1908	8
1909	37
1910	15
1911	17
1912	55
1913	27
1914	25
1915	61
1916	94
1917	64
1918	43
1919	39
1920	66
1921	44
1922	178
1923	71
1924	119
1925	143
1926	86
1927	205
1928	245
1929	290
1930	646
1931	107
1932	290
1933	392
1934	237
1935	253
1936	186
1937	254
1938	401
1939	363
1940	252
1941	402
1942	548
1943	577
1944	718
1945	1,031
1946	287
1947	355
1948	335
1949	294
1950	599
1951	394
1952	793
1953	601
1954	243
1955	650
1956	377
1957	411
1958	326
1959	527
1960	683
1961	734
1962	258
1963	446
1964	239
1965	770
1966	537
1967	549
1968	498
1969	545
1970	521
1971	569
1972	639
1973	2,070
1974	935
1975	850
1976	431
1977	1,430
1978	1,233
1979	875
1980	654
1981	701
1982	1,138
1983	1,170
1984	548
1985	1,391
1986	562
1987	403
1988	764
1989	1,835
1990	1,135
1991	1,101
1992	929
1993	583
1994	844
1995	1,811
1996	1,475
1997	2,935
1998	899
1999	1,738
2000	651
2001	1,792
2002	589
2003	1,431
2004	548
2005	886
2006	650
2007	848
2008	1,141
2009	1,031
2010	574
2011	1,880
2012	846
2013	1,703
2014	615
2015	667
2016	921
2017	846
2018	861
2019	636
2020	712
2021	749
2022	783
2023	835
2024	713
2025	796
2026	840

Download the Data

Data for records on 1966-04-10: 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 50	416
50 to 100	19
100 to 150	2
150 to 200	5
200 to 250	0
250 to 300	0
300 to 350	1