Weather Records on 30 April 1977

525 weather records were set or tied worldwide on 30 April 1977. Highest significance: Japaratuba, BR.

Key Facts for 30 April 1977

On 30 April 1977, 525 weather records were set or tied at long-record stations worldwide.
205 were record highs and 143 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 17 monthly and 507 daily.
Japaratuba set a daily record precipitation of 150.0 mm (5.9 in) on 30 April 1977.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 446 records.

Record Map

525 stations

525 station records on 30 April 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 April 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Japaratuba	Brazil	Record daily precipitation	150.0 mm (5.9 in)	59 of 100 (Notable)
Aquidaba	Brazil	Record daily precipitation	126.2 mm (5.0 in)	56 of 100 (Notable)
Kihnu	Estonia	Record daily precipitation	29.4 mm (1.2 in)	54 of 100 (Notable)
Una (Agr)	South Africa	Record daily precipitation	41.6 mm (1.6 in)	53 of 100 (Notable)
Hvar	Croatia	Record high minimum temperature	19.4 C (66.9 F)	51 of 100 (Notable)
Hico	United States	Record daily precipitation	157.5 mm (6.2 in)	51 of 100 (Notable)
Caico	Brazil	Record daily precipitation	115.0 mm (4.5 in)	50 of 100 (Notable)
Wien	Austria	Record high minimum temperature	14.6 C (58.3 F)	46 of 100 (Notable)
Cerro Cora	Brazil	Record daily precipitation	142.2 mm (5.6 in)	45 of 100 (Notable)
Clyde A	Canada	Record daily snowfall	11.0 cm (4.3 in)	44 of 100 (Notable)
Miami	United States	Record daily precipitation	45.7 mm (1.8 in)	44 of 100 (Notable)
Embrun	France	Record daily precipitation	27.3 mm (1.1 in)	43 of 100 (Notable)
Acude Cedro	Brazil	Record daily precipitation	62.0 mm (2.4 in)	42 of 100 (Notable)
Haenertsburg (Pol)	South Africa	Record daily precipitation	80.5 mm (3.2 in)	42 of 100 (Notable)
Almeria	Spain	Record daily precipitation	33.0 mm (1.3 in)	42 of 100 (Notable)
Alice	United States	Record daily precipitation	55.9 mm (2.2 in)	41 of 100 (Notable)
Scottsbluff W B Heilig Fld AP	United States	Record high minimum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Galeana (Smn)	Mexico	Record high minimum temperature	25.0 C (77.0 F)	40 of 100 (Notable)
Simao Dias (Anapolis)	Brazil	Record daily precipitation	50.2 mm (2.0 in)	39 of 100 (Notable)
Amarante	Brazil	Record daily precipitation	82.4 mm (3.2 in)	38 of 100 (Notable)
Marruas	Brazil	Record daily precipitation	66.1 mm (2.6 in)	38 of 100 (Notable)
Pacatuba (Pacatiba)	Brazil	Record daily precipitation	101.0 mm (4.0 in)	38 of 100 (Notable)
Leroy 5 WSW	United States	Record high minimum temperature	11.1 C (52.0 F)	37 of 100 (Notable)
Paauilo 221	United States	Record daily precipitation	83.3 mm (3.3 in)	37 of 100 (Notable)
Acude Salao	Brazil	Record daily precipitation	90.5 mm (3.6 in)	36 of 100 (Notable)
Rocky Ford 2 SE	United States	Record daily precipitation	46.2 mm (1.8 in)	36 of 100 (Notable)
Stephenville Clark Fld	United States	Record daily precipitation	67.1 mm (2.6 in)	36 of 100 (Notable)
Corpus Christi NAS	United States	Record daily precipitation	69.9 mm (2.8 in)	36 of 100 (Notable)
Vazantes	Brazil	Record daily precipitation	74.0 mm (2.9 in)	34 of 100 (Routine)
Sao Jose de Piranhas	Brazil	Record daily precipitation	39.0 mm (1.5 in)	34 of 100 (Routine)
Sion 2	Switzerland	Record daily precipitation	41.7 mm (1.6 in)	34 of 100 (Routine)
Ponce 4 E	Puerto Rico [United States]	Record low minimum temperature	17.2 C (63.0 F)	33 of 100 (Routine)
Bethany	United States	Record high minimum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Kukaiau 222	United States	Record daily precipitation	103.9 mm (4.1 in)	33 of 100 (Routine)
Catole Do Rocha	Brazil	Record daily precipitation	78.0 mm (3.1 in)	32 of 100 (Routine)
Acatlan de Osorio (Smn)	Mexico	Record low maximum temperature	22.2 C (72.0 F)	32 of 100 (Routine)
Dontsa	South Africa	Record daily precipitation	35.0 mm (1.4 in)	32 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record snow depth	105.0 cm (41.3 in)	32 of 100 (Routine)
Yorktown	United States	Record daily precipitation	54.4 mm (2.1 in)	32 of 100 (Routine)
Yakutat AP	United States	Record daily snowfall	5.1 cm (2.0 in)	32 of 100 (Routine)
Pombal	Brazil	Record daily precipitation	64.5 mm (2.5 in)	31 of 100 (Routine)
Aetna 2 S	United States	Record daily precipitation	44.7 mm (1.8 in)	31 of 100 (Routine)
Seminole	United States	Record daily precipitation	37.6 mm (1.5 in)	31 of 100 (Routine)
Vitoria de Santo Antao	Brazil	Record daily precipitation	50.4 mm (2.0 in)	30 of 100 (Routine)
Caraubas	Brazil	Record daily precipitation	60.0 mm (2.4 in)	30 of 100 (Routine)
Enid	United States	Record daily precipitation	77.2 mm (3.0 in)	30 of 100 (Routine)
Darwin Airport	Australia	Record low maximum temperature	26.6 C (79.9 F)	29 of 100 (Routine)
Areia Branca	Brazil	Record daily precipitation	52.5 mm (2.1 in)	29 of 100 (Routine)
Vernon	United States	Record daily precipitation	68.8 mm (2.7 in)	29 of 100 (Routine)
Aratuba	Brazil	Record daily precipitation	105.6 mm (4.2 in)	28 of 100 (Routine)
Mendubim	Brazil	Record daily precipitation	45.6 mm (1.8 in)	28 of 100 (Routine)
Coscomatepec (Smn)	Mexico	Record daily precipitation	36.8 mm (1.4 in)	28 of 100 (Routine)
Grace	United States	Record high maximum temperature	24.4 C (75.9 F)	28 of 100 (Routine)
Tribune 1W	United States	Record high minimum temperature	12.2 C (54.0 F)	28 of 100 (Routine)
Lumberton	United States	Record low maximum temperature	15.6 C (60.1 F)	28 of 100 (Routine)
Indian Gap	United States	Record daily precipitation	74.2 mm (2.9 in)	28 of 100 (Routine)
Caraubas (Caraibeiras)	Brazil	Record daily precipitation	42.7 mm (1.7 in)	27 of 100 (Routine)
Bom Jardim	Brazil	Record daily precipitation	84.0 mm (3.3 in)	27 of 100 (Routine)
Lowman	United States	Record high maximum temperature	27.2 C (81.0 F)	27 of 100 (Routine)
Dublin 2SE	United States	Record daily precipitation	79.2 mm (3.1 in)	27 of 100 (Routine)

Counts by Type and Timescale

525 records

Records set or tied on 30 April 1977 by type: Highest daily maximum 75, Lowest daily maximum 26, Highest daily minimum 130, Lowest daily minimum 117, Heaviest daily rainfall 160, Heaviest daily snowfall 10, Deepest snow cover 7.

Records on 30 April 1977 by type
Record type	Records
Highest daily maximum	75
Lowest daily maximum	26
Highest daily minimum	130
Lowest daily minimum	117
Heaviest daily rainfall	160
Heaviest daily snowfall	10
Deepest snow cover	7

Records on 30 April 1977 by timescale: all-time 1, monthly 17, daily 507.

How Much Records Were Beaten By

372 broken records

Margins by which the 372 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 381.0. Ties are not counted.

Top 20 by Significance

30 April 1977

Top 20 records on 30 April 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 April 1977	Japaratuba, BR	daily rain	150.0 mm (5.9 in)	111.0 mm (4.4 in)	44 years	59 of 100 (Notable)
30 April 1977	Aquidaba, BR	monthly rain	126.2 mm (5.0 in)	52.2 mm (2.1 in)	0 years	56 of 100 (Notable)
30 April 1977	Kihnu, EE	monthly rain	29.4 mm (1.2 in)	14.6 mm (0.6 in)	0 years	54 of 100 (Notable)
30 April 1977	Una (Agr), ZA	daily rain	41.6 mm (1.6 in)	41.6 mm (1.6 in)	56 years	53 of 100 (Notable)
30 April 1977	Hvar, HR	monthly high min	19.4 C (66.9 F)	0.4 C (0.7 F)	101 years	51 of 100 (Notable)
30 April 1977	Hico, US	all-time rain	157.5 mm (6.2 in)	12.7 mm (0.5 in)	57 years	51 of 100 (Notable)
30 April 1977	Caico, BR	daily rain	115.0 mm (4.5 in)	87.0 mm (3.4 in)	16 years	50 of 100 (Notable)
30 April 1977	Wien, AT	daily high min	14.6 C (58.3 F)	2.1 C (3.8 F)	110 years	46 of 100 (Notable)
30 April 1977	Cerro Cora, BR	daily rain	142.2 mm (5.6 in)	110.8 mm (4.4 in)	6 years	45 of 100 (Notable)
30 April 1977	Clyde A, CA	daily snowfall	11.0 cm (4.3 in)	10.0 cm (3.9 in)	11 years	44 of 100 (Notable)
30 April 1977	Miami, US	daily rain	45.7 mm (1.8 in)	24.1 mm (0.9 in)	46 years	44 of 100 (Notable)
30 April 1977	Embrun, FR	daily rain	27.3 mm (1.1 in)	3.3 mm (0.13 in)	98 years	43 of 100 (Notable)
30 April 1977	Acude Cedro, BR	daily rain	62.0 mm (2.4 in)	31.8 mm (1.3 in)	48 years	42 of 100 (Notable)
30 April 1977	Haenertsburg (Pol), ZA	monthly rain	80.5 mm (3.2 in)	15.7 mm (0.6 in)	39 years	42 of 100 (Notable)
30 April 1977	Almeria, ES	daily rain	33.0 mm (1.3 in)	20.6 mm (0.8 in)	40 years	42 of 100 (Notable)
30 April 1977	Alice, US	daily rain	55.9 mm (2.2 in)	26.7 mm (1.1 in)	59 years	41 of 100 (Notable)
30 April 1977	Scottsbluff W B Heilig Fld AP, US	monthly high min	12.8 C (55.0 F)	0.6 C (1.1 F)	76 years	41 of 100 (Notable)
30 April 1977	Galeana (Smn), MX	daily high min	25.0 C (77.0 F)	7.2 C (13.0 F)	52 years	40 of 100 (Notable)
30 April 1977	Simao Dias (Anapolis), BR	daily rain	50.2 mm (2.0 in)	30.7 mm (1.2 in)	31 years	39 of 100 (Notable)
30 April 1977	Amarante, BR	daily rain	82.4 mm (3.2 in)	32.9 mm (1.3 in)	52 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

1795 to 1977

Records set or tied on this calendar date in each year from 1795 to 1977. 1977 had 525 records.

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

Records on 04-30 in each year
Year	Records
1795	1
1804	1
1809	1
1812	1
1814	2
1833	1
1840	1
1848	1
1850	1
1853	1
1854	1
1856	1
1859	1
1862	1
1864	1
1865	1
1866	3
1872	1
1873	1
1874	2
1876	1
1878	4
1879	2
1880	1
1881	1
1882	1
1884	1
1885	1
1886	5
1888	1
1889	1
1891	5
1892	7
1894	1
1895	5
1896	3
1897	2
1898	6
1899	11
1900	4
1901	8
1902	13
1903	21
1904	11
1905	9
1906	16
1907	35
1908	28
1909	74
1910	17
1911	19
1912	18
1913	62
1914	8
1915	20
1916	21
1917	25
1918	28
1919	130
1920	70
1921	54
1922	138
1923	42
1924	96
1925	210
1926	331
1927	127
1928	130
1929	119
1930	232
1931	548
1932	145
1933	422
1934	443
1935	327
1936	373
1937	228
1938	282
1939	268
1940	526
1941	484
1942	1,163
1943	470
1944	286
1945	314
1946	301
1947	330
1948	912
1949	447
1950	671
1951	783
1952	435
1953	635
1954	1,224
1955	1,252
1956	908
1957	401
1958	482
1959	575
1960	507
1961	381
1962	617
1963	730
1964	339
1965	488
1966	740
1967	914
1968	928
1969	587
1970	1,189
1971	365
1972	497
1973	398
1974	822
1975	468
1976	783
1977	525
1978	631
1979	675
1980	545
1981	1,342
1982	504
1983	1,154
1984	1,519
1985	650
1986	660
1987	1,437
1988	808
1989	674
1990	977
1991	828
1992	1,808
1993	765
1994	1,499
1995	1,007
1996	1,637
1997	764
1998	857
1999	1,012
2000	1,046
2001	900
2002	1,171
2003	927
2004	703
2005	1,113
2006	778
2007	996
2008	1,260
2009	660
2010	921
2011	636
2012	819
2013	732
2014	946
2015	380
2016	969
2017	1,450
2018	708
2019	700
2020	1,476
2021	1,167
2022	499
2023	782
2024	705
2025	489
2026	365

Download the Data

Data for records on 1977-04-30: 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	359
50 to 100	8
100 to 150	3
150 to 200	0
200 to 250	0
250 to 300	1
300 to 350	0
350 to 400	1