Weather Records on 18 April 1963

662 weather records were set or tied worldwide on 18 April 1963. Highest significance: Ituacu, BR.

Key Facts for 18 April 1963

On 18 April 1963, 662 weather records were set or tied at long-record stations worldwide.
256 were record highs and 210 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 648 daily.
Ituacu set a daily record precipitation of 69.0 mm (2.7 in) on 18 April 1963.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 466 records.

Record Map

662 stations

662 station records on 18 April 1963 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ituacu	Brazil	Record daily precipitation	69.0 mm (2.7 in)	56 of 100 (Notable)
Lima	United States	Record daily snowfall	25.4 cm (10.0 in)	54 of 100 (Notable)
Heppner	United States	Record daily precipitation	26.7 mm (1.1 in)	52 of 100 (Notable)
Meeker	United States	Record daily snowfall	17.8 cm (7.0 in)	50 of 100 (Notable)
Morro Do Chapeu	Brazil	Record daily precipitation	53.4 mm (2.1 in)	49 of 100 (Notable)
Ashton 1N	United States	Record daily snowfall	10.2 cm (4.0 in)	48 of 100 (Notable)
Perry	United States	Record daily precipitation	33.8 mm (1.3 in)	48 of 100 (Notable)
Nkhota Kota	Malawi	Record daily precipitation	134.4 mm (5.3 in)	47 of 100 (Notable)
Naalehu 14	United States	Record daily precipitation	82.3 mm (3.2 in)	47 of 100 (Notable)
Tbilisi	Georgia	Record daily precipitation	35.0 mm (1.4 in)	46 of 100 (Notable)
Hayden	United States	Record daily snowfall	11.4 cm (4.5 in)	46 of 100 (Notable)
Condon	United States	Record daily snowfall	7.6 cm (3.0 in)	42 of 100 (Notable)
American Falls 6 NE	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Pahala 21	United States	Record daily precipitation	77.7 mm (3.1 in)	41 of 100 (Notable)
Cumberland	Canada	Record daily precipitation	31.8 mm (1.3 in)	38 of 100 (Notable)
Lima	United States	Record snow depth	10.2 cm (4.0 in)	37 of 100 (Notable)
Kaumana 88.1	United States	Record daily precipitation	166.4 mm (6.6 in)	37 of 100 (Notable)
Nguiu	Australia	Record daily precipitation	101.1 mm (4.0 in)	36 of 100 (Notable)
Heber	United States	Record daily snowfall	7.6 cm (3.0 in)	36 of 100 (Notable)
Novo Acre (Giqui)	Brazil	Record daily precipitation	57.7 mm (2.3 in)	35 of 100 (Notable)
Ft Bidwell	United States	Record low maximum temperature	2.8 C (37.0 F)	35 of 100 (Notable)
Bhimunipatnam	India	Record daily precipitation	28.1 mm (1.1 in)	34 of 100 (Routine)
Boca	United States	Record daily precipitation	26.2 mm (1.0 in)	34 of 100 (Routine)
Truckee Rs	United States	Record low minimum temperature	-15.6 C (3.9 F)	34 of 100 (Routine)
Custer	United States	Record daily snowfall	11.4 cm (4.5 in)	34 of 100 (Routine)
Jacare	Brazil	Record daily precipitation	40.2 mm (1.6 in)	33 of 100 (Routine)
Van Wert 1 S	United States	Record daily precipitation	31.2 mm (1.2 in)	33 of 100 (Routine)
Forbes (Camp Street)	Australia	Record low minimum temperature	2.2 C (36.0 F)	32 of 100 (Routine)
Bowman Dam	United States	Record low maximum temperature	0.6 C (33.1 F)	32 of 100 (Routine)
Sugar City	United States	Record daily snowfall	5.1 cm (2.0 in)	32 of 100 (Routine)
Idaho City	United States	Record low maximum temperature	4.4 C (39.9 F)	31 of 100 (Routine)
Richfield Radio Ksvc	United States	Record low maximum temperature	6.7 C (44.1 F)	31 of 100 (Routine)
Beckley Va Hospital	United States	Record high minimum temperature	17.2 C (63.0 F)	31 of 100 (Routine)
Balkapur	India	Record daily precipitation	27.9 mm (1.1 in)	30 of 100 (Routine)
Logansport Cicott St	United States	Record daily precipitation	36.8 mm (1.4 in)	30 of 100 (Routine)
Pontiac Wwtp	United States	Record daily precipitation	25.4 mm (1.0 in)	30 of 100 (Routine)
Scottsburg	United States	Record high minimum temperature	18.3 C (64.9 F)	29 of 100 (Routine)
Mayaguez City	Puerto Rico [United States]	Record low maximum temperature	27.8 C (82.0 F)	28 of 100 (Routine)
Granite Reef Dam	United States	Record low minimum temperature	3.3 C (37.9 F)	28 of 100 (Routine)
Henderson 8 SSW	United States	Record high minimum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Paducah	United States	Record high minimum temperature	20.6 C (69.1 F)	28 of 100 (Routine)
Hettinger	United States	Record daily snowfall	7.6 cm (3.0 in)	28 of 100 (Routine)
Corvallis State UNIV	United States	Record low maximum temperature	8.9 C (48.0 F)	28 of 100 (Routine)
Mc Minnville	United States	Record low maximum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Uniontown 1 NE	United States	Record high minimum temperature	16.1 C (61.0 F)	28 of 100 (Routine)
Kingsport	United States	Record high minimum temperature	17.8 C (64.0 F)	28 of 100 (Routine)
Brownwood 2NE	United States	Record high minimum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Dale Enterprise	United States	Record high minimum temperature	14.4 C (57.9 F)	28 of 100 (Routine)
Lexington	United States	Record high minimum temperature	16.1 C (61.0 F)	28 of 100 (Routine)
Wytheville	United States	Record high minimum temperature	16.1 C (61.0 F)	28 of 100 (Routine)
Ketchikan AP	United States	Record daily snowfall	5.1 cm (2.0 in)	28 of 100 (Routine)
Cedarville	United States	Record low maximum temperature	3.9 C (39.0 F)	27 of 100 (Routine)
Umatilla	United States	Record low maximum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Midland 4 ENE	United States	Record high minimum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Honomu Mauka 138	United States	Record daily precipitation	182.6 mm (7.2 in)	27 of 100 (Routine)
N Bend SW Oregon Rgnl AP	United States	Record low maximum temperature	8.9 C (48.0 F)	27 of 100 (Routine)
Solomons	United States	Record high maximum temperature	28.3 C (82.9 F)	26 of 100 (Routine)
Heppner	United States	Record low maximum temperature	5.6 C (42.1 F)	26 of 100 (Routine)
Levan	United States	Record snow depth	10.2 cm (4.0 in)	26 of 100 (Routine)
Tuzigoot Nm	United States	Record low minimum temperature	-0.6 C (30.9 F)	25 of 100 (Routine)

Counts by Type and Timescale

662 records

Records set or tied on 18 April 1963 by type: Highest daily maximum 45, Lowest daily maximum 141, Highest daily minimum 211, Lowest daily minimum 69, Heaviest daily rainfall 146, Heaviest daily snowfall 40, Deepest snow cover 10.

Records on 18 April 1963 by type
Record type	Records
Highest daily maximum	45
Lowest daily maximum	141
Highest daily minimum	211
Lowest daily minimum	69
Heaviest daily rainfall	146
Heaviest daily snowfall	40
Deepest snow cover	10

Records on 18 April 1963 by timescale: all-time 0, monthly 14, daily 648.

How Much Records Were Beaten By

499 broken records

Margins by which the 499 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 229.0. Ties are not counted.

Top 20 by Significance

18 April 1963

Top 20 records on 18 April 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1963	Ituacu, BR	daily rain	69.0 mm (2.7 in)	51.5 mm (2.0 in)	50 years	56 of 100 (Notable)
18 April 1963	Lima, US	daily snowfall	25.4 cm (10.0 in)	22.9 cm (9.0 in)	45 years	54 of 100 (Notable)
18 April 1963	Heppner, US	daily rain	26.7 mm (1.1 in)	12.2 mm (0.5 in)	60 years	52 of 100 (Notable)
18 April 1963	Meeker, US	daily snowfall	17.8 cm (7.0 in)	12.7 cm (5.0 in)	60 years	50 of 100 (Notable)
18 April 1963	Morro Do Chapeu, BR	daily rain	53.4 mm (2.1 in)	35.6 mm (1.4 in)	13 years	49 of 100 (Notable)
18 April 1963	Ashton 1N, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	65 years	48 of 100 (Notable)
18 April 1963	Perry, US	daily rain	33.8 mm (1.3 in)	21.1 mm (0.8 in)	60 years	48 of 100 (Notable)
18 April 1963	Nkhota Kota, MW	daily rain	134.4 mm (5.3 in)	93.0 mm (3.7 in)	10 years	47 of 100 (Notable)
18 April 1963	Naalehu 14, US	daily rain	82.3 mm (3.2 in)	48.5 mm (1.9 in)	38 years	47 of 100 (Notable)
18 April 1963	Tbilisi, GE	daily rain	35.0 mm (1.4 in)	14.2 mm (0.6 in)	48 years	46 of 100 (Notable)
18 April 1963	Hayden, US	daily snowfall	11.4 cm (4.5 in)	11.4 cm (4.5 in)	53 years	46 of 100 (Notable)
18 April 1963	Condon, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	50 years	42 of 100 (Notable)
18 April 1963	American Falls 6 NE, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	69 years	41 of 100 (Notable)
18 April 1963	Pahala 21, US	daily rain	77.7 mm (3.1 in)	52.0 mm (2.0 in)	38 years	41 of 100 (Notable)
18 April 1963	Cumberland, CA	daily rain	31.8 mm (1.3 in)	18.8 mm (0.7 in)	30 years	38 of 100 (Notable)
18 April 1963	Lima, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	63 years	37 of 100 (Notable)
18 April 1963	Kaumana 88.1, US	daily rain	166.4 mm (6.6 in)	99.3 mm (3.9 in)	8 years	37 of 100 (Notable)
18 April 1963	Nguiu, AU	daily rain	101.1 mm (4.0 in)	74.4 mm (2.9 in)	9 years	36 of 100 (Notable)
18 April 1963	Heber, US	daily snowfall	7.6 cm (3.0 in)	5.1 cm (2.0 in)	66 years	36 of 100 (Notable)
18 April 1963	Novo Acre (Giqui), BR	daily rain	57.7 mm (2.3 in)	32.9 mm (1.3 in)	17 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

1793 to 1963

Records set or tied on this calendar date in each year from 1793 to 1963. 1963 had 662 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1963-04-18: 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	475
50 to 100	15
100 to 150	7
150 to 200	1
200 to 250	1