Weather Records on 1 April 1966

689 weather records were set or tied worldwide on 1 April 1966. Highest significance: Mallina, AU.

Key Facts for 1 April 1966

On 1 April 1966, 689 weather records were set or tied at long-record stations worldwide.
517 were record highs and 48 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 21 monthly and 667 daily.
Mallina set a monthly record daily precipitation of 78.7 mm (3.1 in) on 1 April 1966.
Across 160 earlier years (1803 to 2026) the same calendar date averaged 476 records.

Record Map

689 stations

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

Weather records on 1 April 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mallina	Australia	Record daily precipitation	78.7 mm (3.1 in)	62 of 100 (Major)
El Salto (Smn)	Mexico	Record daily precipitation	37.8 mm (1.5 in)	59 of 100 (Notable)
Barcelona -Fabra Observatory	Spain	Record daily precipitation	47.0 mm (1.9 in)	56 of 100 (Notable)
Woodbrook	Australia	Record daily precipitation	53.3 mm (2.1 in)	48 of 100 (Notable)
Watersmeet	United States	Record daily snowfall	22.9 cm (9.0 in)	45 of 100 (Notable)
Pioche	United States	Record high minimum temperature	10.0 C (50.0 F)	42 of 100 (Notable)
Bergland Dam	United States	Record daily snowfall	24.9 cm (9.8 in)	40 of 100 (Notable)
Winnemucca AP	United States	Record high maximum temperature	28.9 C (84.0 F)	40 of 100 (Notable)
Mount Forest	Canada	Record daily snowfall	10.4 cm (4.1 in)	39 of 100 (Notable)
Koppiesvlei	South Africa	Record daily precipitation	47.0 mm (1.9 in)	39 of 100 (Notable)
Ft Bidwell	United States	Record high maximum temperature	27.8 C (82.0 F)	39 of 100 (Notable)
Ostrov Kotelnyj	Russia	Record low maximum temperature	-41.0 C (-41.8 F)	38 of 100 (Notable)
Rietpan	South Africa	Record daily precipitation	31.0 mm (1.2 in)	37 of 100 (Notable)
Rietpan	South Africa	Record daily precipitation	51.0 mm (2.0 in)	37 of 100 (Notable)
Fernao Dias	Brazil	Record daily precipitation	55.5 mm (2.2 in)	35 of 100 (Notable)
Baturite	Brazil	Record daily precipitation	50.3 mm (2.0 in)	35 of 100 (Notable)
Sao Jose de Mipibu	Brazil	Record daily precipitation	77.3 mm (3.0 in)	35 of 100 (Notable)
Ironwood	United States	Record daily snowfall	30.0 cm (11.8 in)	35 of 100 (Notable)
Watersmeet	United States	Record daily precipitation	51.3 mm (2.0 in)	35 of 100 (Notable)
Haina 214	United States	Record low maximum temperature	18.3 C (64.9 F)	35 of 100 (Notable)
Sacramento 5 ESE	United States	Record high minimum temperature	13.3 C (55.9 F)	35 of 100 (Notable)
Poortjie	South Africa	Record daily precipitation	36.0 mm (1.4 in)	33 of 100 (Routine)
Lakeview 2 NNW	United States	Record high maximum temperature	24.4 C (75.9 F)	33 of 100 (Routine)
Verhojansk	Russia	Record low maximum temperature	-26.5 C (-15.7 F)	31 of 100 (Routine)
Caldwell	United States	Record high maximum temperature	29.4 C (84.9 F)	31 of 100 (Routine)
Verhojansk	Russia	Record low minimum temperature	-48.6 C (-55.5 F)	30 of 100 (Routine)
Sheffield	United Kingdom	Record daily precipitation	38.1 mm (1.5 in)	30 of 100 (Routine)
Rangely 1E	United States	Record high maximum temperature	23.3 C (73.9 F)	30 of 100 (Routine)
Payette	United States	Record high maximum temperature	28.9 C (84.0 F)	30 of 100 (Routine)
Bad Axe	United States	Record daily snowfall	10.2 cm (4.0 in)	30 of 100 (Routine)
Dillon U of Montana Western	United States	Record high maximum temperature	21.7 C (71.1 F)	30 of 100 (Routine)
Fallon Exp STN	United States	Record high maximum temperature	30.6 C (87.1 F)	30 of 100 (Routine)
Alton	United States	Record high minimum temperature	6.1 C (43.0 F)	30 of 100 (Routine)
Lucknow	Canada	Record daily snowfall	8.1 cm (3.2 in)	29 of 100 (Routine)
Moncton	Canada	Record daily snowfall	7.6 cm (3.0 in)	29 of 100 (Routine)
Ostrov Kotelnyj	Russia	Record low minimum temperature	-46.2 C (-51.2 F)	29 of 100 (Routine)
Shalaurova Mys	Russia	Record low minimum temperature	-44.4 C (-47.9 F)	29 of 100 (Routine)
Snowflake	United States	Record high maximum temperature	27.2 C (81.0 F)	29 of 100 (Routine)
Salida	United States	Record high maximum temperature	22.8 C (73.0 F)	29 of 100 (Routine)
Hamilton	United States	Record high maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
St George	United States	Record high maximum temperature	31.7 C (89.1 F)	29 of 100 (Routine)
Park Falls Dnr HQ	United States	Record daily snowfall	10.2 cm (4.0 in)	29 of 100 (Routine)
Klipspruit	South Africa	Record daily precipitation	36.5 mm (1.4 in)	28 of 100 (Routine)
Kern River Ph 1	United States	Record high minimum temperature	18.3 C (64.9 F)	28 of 100 (Routine)
Redlands	United States	Record high minimum temperature	13.3 C (55.9 F)	28 of 100 (Routine)
Fernandina Beach	United States	Record high maximum temperature	31.1 C (88.0 F)	28 of 100 (Routine)
Glenns Ferry	United States	Record high maximum temperature	28.3 C (82.9 F)	28 of 100 (Routine)
Lordsburg 4 SE	United States	Record high maximum temperature	29.4 C (84.9 F)	28 of 100 (Routine)
Castle Dale	United States	Record high maximum temperature	25.0 C (77.0 F)	28 of 100 (Routine)
Monticello 2E	United States	Record high maximum temperature	20.6 C (69.1 F)	28 of 100 (Routine)
Zion Np	United States	Record high minimum temperature	11.7 C (53.1 F)	28 of 100 (Routine)
Ahuacatlan	Mexico	Record low maximum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
Shalaurova Mys	Russia	Record low maximum temperature	-37.9 C (-36.2 F)	27 of 100 (Routine)
Stensele	Sweden	Record snow depth	102.0 cm (40.2 in)	27 of 100 (Routine)
Mesa	United States	Record high maximum temperature	33.3 C (91.9 F)	27 of 100 (Routine)
Alturas	United States	Record high maximum temperature	27.8 C (82.0 F)	27 of 100 (Routine)
San Luis Obispo Poly	United States	Record high maximum temperature	32.8 C (91.0 F)	27 of 100 (Routine)
Pagosa Springs 1SE	United States	Record high maximum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Garden Valley	United States	Record high maximum temperature	26.1 C (79.0 F)	27 of 100 (Routine)
Riggins	United States	Record high maximum temperature	26.7 C (80.1 F)	27 of 100 (Routine)

Counts by Type and Timescale

689 records

Records set or tied on 1 April 1966 by type: Highest daily maximum 431, Lowest daily maximum 28, Highest daily minimum 86, Lowest daily minimum 20, Heaviest daily rainfall 99, Heaviest daily snowfall 19, Deepest snow cover 6.

Records on 1 April 1966 by type
Record type	Records
Highest daily maximum	431
Lowest daily maximum	28
Highest daily minimum	86
Lowest daily minimum	20
Heaviest daily rainfall	99
Heaviest daily snowfall	19
Deepest snow cover	6

Records on 1 April 1966 by timescale: all-time 1, monthly 21, daily 667.

How Much Records Were Beaten By

571 broken records

Margins by which the 571 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 350.0. Ties are not counted.

Top 20 by Significance

1 April 1966

Top 20 records on 1 April 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 April 1966	Mallina, AU	monthly rain	78.7 mm (3.1 in)	34.8 mm (1.4 in)	42 years	62 of 100 (Major)
1 April 1966	El Salto (Smn), MX	monthly rain	37.8 mm (1.5 in)	23.3 mm (0.9 in)	17 years	59 of 100 (Notable)
1 April 1966	Barcelona -Fabra Observatory, ES	daily rain	47.0 mm (1.9 in)	28.6 mm (1.1 in)	51 years	56 of 100 (Notable)
1 April 1966	Woodbrook, AU	daily rain	53.3 mm (2.1 in)	49.5 mm (1.9 in)	52 years	48 of 100 (Notable)
1 April 1966	Watersmeet, US	daily snowfall	22.9 cm (9.0 in)	14.8 cm (5.8 in)	52 years	45 of 100 (Notable)
1 April 1966	Pioche, US	daily high min	10.0 C (50.0 F)	5.6 C (10.1 F)	77 years	42 of 100 (Notable)
1 April 1966	Bergland Dam, US	daily snowfall	24.9 cm (9.8 in)	14.5 cm (5.7 in)	21 years	40 of 100 (Notable)
1 April 1966	Winnemucca AP, US	daily high max	28.9 C (84.0 F)	3.9 C (7.0 F)	84 years	40 of 100 (Notable)
1 April 1966	Mount Forest, CA	daily snowfall	10.4 cm (4.1 in)	5.3 cm (2.1 in)	40 years	39 of 100 (Notable)
1 April 1966	Koppiesvlei, ZA	daily rain	47.0 mm (1.9 in)	33.4 mm (1.3 in)	12 years	39 of 100 (Notable)
1 April 1966	Ft Bidwell, US	daily high max	27.8 C (82.0 F)	3.4 C (6.1 F)	84 years	39 of 100 (Notable)
1 April 1966	Ostrov Kotelnyj, RU	monthly low max	-41.0 C (-41.8 F)	9.3 C (16.7 F)	26 years	38 of 100 (Notable)
1 April 1966	Rietpan, ZA	daily rain	31.0 mm (1.2 in)	23.4 mm (0.9 in)	32 years	37 of 100 (Notable)
1 April 1966	Rietpan, ZA	daily rain	51.0 mm (2.0 in)	35.5 mm (1.4 in)	16 years	37 of 100 (Notable)
1 April 1966	Fernao Dias, BR	daily rain	55.5 mm (2.2 in)	34.0 mm (1.3 in)	24 years	35 of 100 (Notable)
1 April 1966	Baturite, BR	daily rain	50.3 mm (2.0 in)	20.3 mm (0.8 in)	53 years	35 of 100 (Notable)
1 April 1966	Sao Jose de Mipibu, BR	daily rain	77.3 mm (3.0 in)	32.0 mm (1.3 in)	33 years	35 of 100 (Notable)
1 April 1966	Ironwood, US	daily snowfall	30.0 cm (11.8 in)	9.7 cm (3.8 in)	40 years	35 of 100 (Notable)
1 April 1966	Watersmeet, US	monthly rain	51.3 mm (2.0 in)	13.2 mm (0.5 in)	5 years	35 of 100 (Notable)
1 April 1966	Haina 214, US	daily low max	18.3 C (64.9 F)	2.8 C (5.0 F)	51 years	35 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

1803 to 1966

Records set or tied on this calendar date in each year from 1803 to 1966. 1966 had 689 records.

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

Records on 04-01 in each year
Year	Records
1803	1
1805	1
1808	1
1813	1
1815	3
1819	1
1830	2
1847	2
1848	1
1850	1
1855	3
1856	1
1861	2
1862	2
1865	1
1869	2
1872	1
1873	1
1874	2
1876	1
1878	3
1879	2
1881	1
1885	1
1887	2
1888	2
1889	2
1891	5
1892	1
1893	2
1896	4
1897	5
1898	3
1899	4
1900	4
1901	4
1902	4
1903	12
1904	29
1905	10
1906	7
1907	24
1908	5
1909	13
1910	26
1911	27
1912	31
1913	35
1914	37
1915	25
1916	35
1917	80
1918	51
1919	165
1920	65
1921	46
1922	98
1923	319
1924	257
1925	111
1926	234
1927	326
1928	194
1929	336
1930	153
1931	846
1932	292
1933	188
1934	153
1935	424
1936	1,248
1937	192
1938	461
1939	226
1940	840
1941	285
1942	209
1943	319
1944	266
1945	880
1946	1,172
1947	390
1948	590
1949	308
1950	455
1951	406
1952	419
1953	249
1954	493
1955	288
1956	744
1957	314
1958	535
1959	821
1960	295
1961	496
1962	652
1963	1,123
1964	951
1965	678
1966	689
1967	928
1968	377
1969	611
1970	894
1971	384
1972	510
1973	680
1974	894
1975	1,806
1976	767
1977	524
1978	1,013
1979	738
1980	797
1981	1,115
1982	884
1983	643
1984	662
1985	826
1986	982
1987	1,762
1988	1,259
1989	1,098
1990	952
1991	693
1992	981
1993	783
1994	739
1995	1,056
1996	996
1997	1,255
1998	1,703
1999	1,341
2000	690
2001	575
2002	985
2003	1,366
2004	926
2005	1,086
2006	929
2007	963
2008	1,457
2009	846
2010	1,022
2011	1,105
2012	1,327
2013	719
2014	657
2015	606
2016	842
2017	792
2018	870
2019	674
2020	719
2021	790
2022	853
2023	1,069
2024	788
2025	779
2026	1,042

Download the Data

Data for records on 1966-04-01: 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	560
50 to 100	6
100 to 150	4
150 to 200	0
200 to 250	0
250 to 300	0
300 to 350	1