Weather Records on 27 April 1977

801 weather records were set or tied worldwide on 27 April 1977. Highest significance: Cotegipe, BR.

Key Facts for 27 April 1977

On 27 April 1977, 801 weather records were set or tied at long-record stations worldwide.
351 were record highs and 206 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 29 monthly and 771 daily.
Cotegipe set a daily record precipitation of 77.8 mm (3.1 in) on 27 April 1977.
Across 158 earlier years (1795 to 2026) the same calendar date averaged 473 records.

Record Map

801 stations

801 station records on 27 April 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 April 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cotegipe	Brazil	Record daily precipitation	77.8 mm (3.1 in)	55 of 100 (Notable)
Clyde A	Canada	Record daily snowfall	37.4 cm (14.7 in)	49 of 100 (Notable)
Ponte de Itabapoana	Brazil	Record daily precipitation	81.4 mm (3.2 in)	48 of 100 (Notable)
Towera	Australia	Record daily precipitation	51.4 mm (2.0 in)	47 of 100 (Notable)
Santo Inacio	Brazil	Record daily precipitation	118.2 mm (4.7 in)	46 of 100 (Notable)
Ouro Branco (Manairama)	Brazil	Record daily precipitation	73.0 mm (2.9 in)	44 of 100 (Notable)
Salgadinho	Brazil	Record daily precipitation	82.8 mm (3.3 in)	41 of 100 (Notable)
Port Washington	United States	Record high maximum temperature	27.2 C (81.0 F)	40 of 100 (Notable)
Galway	Ireland	Record low maximum temperature	9.0 C (48.2 F)	39 of 100 (Notable)
Bobo-Dioulasso	Burkina Faso	Record high minimum temperature	29.0 C (84.2 F)	38 of 100 (Notable)
Castelo	Brazil	Record daily precipitation	52.0 mm (2.0 in)	37 of 100 (Notable)
Southport 5 N	United States	Record low minimum temperature	2.8 C (37.0 F)	37 of 100 (Notable)
Thomas	United States	Record daily snowfall	10.2 cm (4.0 in)	36 of 100 (Notable)
Ornskoldsvik	Sweden	Record daily precipitation	29.3 mm (1.2 in)	35 of 100 (Notable)
Tucson WFO	United States	Record high minimum temperature	20.0 C (68.0 F)	35 of 100 (Notable)
Winkelman 6 S	United States	Record high maximum temperature	35.0 C (95.0 F)	34 of 100 (Routine)
Winnsboro 5 SSE	United States	Record low minimum temperature	7.2 C (45.0 F)	34 of 100 (Routine)
New England	United States	Record high minimum temperature	11.1 C (52.0 F)	34 of 100 (Routine)
Carey Downs	Australia	Record daily precipitation	28.0 mm (1.1 in)	33 of 100 (Routine)
Mansidao	Brazil	Record daily precipitation	68.6 mm (2.7 in)	33 of 100 (Routine)
Pedro II	Brazil	Record daily precipitation	86.2 mm (3.4 in)	32 of 100 (Routine)
De Funiak Springs 1 E	United States	Record low minimum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Fleming	United States	Record low minimum temperature	2.8 C (37.0 F)	32 of 100 (Routine)
Millen 4 N	United States	Record low minimum temperature	0.6 C (33.1 F)	32 of 100 (Routine)
Belle Plaine	United States	Record high maximum temperature	29.4 C (84.9 F)	32 of 100 (Routine)
Forest City 2 NNE	United States	Record high maximum temperature	30.0 C (86.0 F)	32 of 100 (Routine)
Caledonia	United States	Record high maximum temperature	29.4 C (84.9 F)	32 of 100 (Routine)
Montevideo 1SW	United States	Record high maximum temperature	31.7 C (89.1 F)	32 of 100 (Routine)
Moab	United States	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record snow depth	122.0 cm (48.0 in)	31 of 100 (Routine)
Cordele	United States	Record low minimum temperature	5.6 C (42.1 F)	31 of 100 (Routine)
Maquoketa	United States	Record high maximum temperature	28.9 C (84.0 F)	31 of 100 (Routine)
Pipestone	United States	Record high maximum temperature	30.6 C (87.1 F)	31 of 100 (Routine)
Poplar 2 E	United States	Record high minimum temperature	12.8 C (55.0 F)	31 of 100 (Routine)
Castlewood	United States	Record high maximum temperature	30.6 C (87.1 F)	31 of 100 (Routine)
Wentworth 2.5 WNW	United States	Record high maximum temperature	32.2 C (90.0 F)	31 of 100 (Routine)
Boqueirao	Brazil	Record daily precipitation	72.2 mm (2.8 in)	30 of 100 (Routine)
Ostrov Sosnovez	Russia	Record high minimum temperature	1.0 C (33.8 F)	30 of 100 (Routine)
Prattville	United States	Record low maximum temperature	15.6 C (60.1 F)	30 of 100 (Routine)
Ft Pierce	United States	Record low minimum temperature	11.7 C (53.1 F)	30 of 100 (Routine)
Farmerville	United States	Record low minimum temperature	6.7 C (44.1 F)	30 of 100 (Routine)
Lovell	United States	Record high minimum temperature	7.2 C (45.0 F)	30 of 100 (Routine)
Anniston Metro AP	United States	Record low minimum temperature	3.3 C (37.9 F)	30 of 100 (Routine)
Sao Jose Do Egito	Brazil	Record daily precipitation	39.0 mm (1.5 in)	29 of 100 (Routine)
Shenkursk	Russia	Record high minimum temperature	10.1 C (50.2 F)	29 of 100 (Routine)
Troicko-Pecherskoe	Russia	Record high maximum temperature	22.3 C (72.1 F)	29 of 100 (Routine)
Livingston	United States	Record low minimum temperature	3.3 C (37.9 F)	29 of 100 (Routine)
Plant City	United States	Record low minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
St Peter	United States	Record high maximum temperature	31.7 C (89.1 F)	29 of 100 (Routine)
Plevna	United States	Record high minimum temperature	11.1 C (52.0 F)	29 of 100 (Routine)
Alma	United States	Record high maximum temperature	31.7 C (89.1 F)	29 of 100 (Routine)
Vermillion 2 SE	United States	Record high maximum temperature	31.1 C (88.0 F)	29 of 100 (Routine)
Pathfinder Dam	United States	Record high minimum temperature	9.4 C (48.9 F)	29 of 100 (Routine)
Redwood Falls Muni AP	United States	Record high maximum temperature	32.2 C (90.0 F)	29 of 100 (Routine)
Lorne Peak	Australia	Record daily precipitation	43.0 mm (1.7 in)	28 of 100 (Routine)
Tg Jiu	Romania	Record low minimum temperature	-0.6 C (30.9 F)	28 of 100 (Routine)
Truxton Canyon	United States	Record high minimum temperature	11.1 C (52.0 F)	28 of 100 (Routine)
Denison	United States	Record high maximum temperature	29.4 C (84.9 F)	28 of 100 (Routine)
Farmington 3NW	United States	Record high maximum temperature	31.7 C (89.1 F)	28 of 100 (Routine)
Milan 1NW	United States	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

801 records

Records set or tied on 27 April 1977 by type: Highest daily maximum 182, Lowest daily maximum 62, Highest daily minimum 169, Lowest daily minimum 144, Heaviest daily rainfall 228, Heaviest daily snowfall 10, Deepest snow cover 6.

Records on 27 April 1977 by type
Record type	Records
Highest daily maximum	182
Lowest daily maximum	62
Highest daily minimum	169
Lowest daily minimum	144
Heaviest daily rainfall	228
Heaviest daily snowfall	10
Deepest snow cover	6

Records on 27 April 1977 by timescale: all-time 1, monthly 29, daily 771.

How Much Records Were Beaten By

599 broken records

Margins by which the 599 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 283.0. Ties are not counted.

Top 20 by Significance

27 April 1977

Top 20 records on 27 April 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 April 1977	Cotegipe, BR	daily rain	77.8 mm (3.1 in)	77.8 mm (3.1 in)	40 years	55 of 100 (Notable)
27 April 1977	Clyde A, CA	daily snowfall	37.4 cm (14.7 in)	28.3 cm (11.1 in)	18 years	49 of 100 (Notable)
27 April 1977	Ponte de Itabapoana, BR	daily rain	81.4 mm (3.2 in)	62.6 mm (2.5 in)	16 years	48 of 100 (Notable)
27 April 1977	Towera, AU	daily rain	51.4 mm (2.0 in)	39.7 mm (1.6 in)	54 years	47 of 100 (Notable)
27 April 1977	Santo Inacio, BR	monthly rain	118.2 mm (4.7 in)	38.0 mm (1.5 in)	33 years	46 of 100 (Notable)
27 April 1977	Ouro Branco (Manairama), BR	daily rain	73.0 mm (2.9 in)	46.2 mm (1.8 in)	43 years	44 of 100 (Notable)
27 April 1977	Salgadinho, BR	daily rain	82.8 mm (3.3 in)	47.0 mm (1.9 in)	38 years	41 of 100 (Notable)
27 April 1977	Port Washington, US	daily high max	27.2 C (81.0 F)	6.1 C (11.0 F)	76 years	40 of 100 (Notable)
27 April 1977	Galway, IE	daily low max	9.0 C (48.2 F)	1.0 C (1.8 F)	89 years	39 of 100 (Notable)
27 April 1977	Bobo-Dioulasso, BF	all-time high min	29.0 C (84.2 F)	1.1 C (2.0 F)	32 years	38 of 100 (Notable)
27 April 1977	Castelo, BR	daily rain	52.0 mm (2.0 in)	31.2 mm (1.2 in)	32 years	37 of 100 (Notable)
27 April 1977	Southport 5 N, US	daily low min	2.8 C (37.0 F)	2.8 C (5.0 F)	78 years	37 of 100 (Notable)
27 April 1977	Thomas, US	daily snowfall	10.2 cm (4.0 in)	7.7 cm (3.0 in)	44 years	36 of 100 (Notable)
27 April 1977	Ornskoldsvik, SE	daily rain	29.3 mm (1.2 in)	14.7 mm (0.6 in)	8 years	35 of 100 (Notable)
27 April 1977	Tucson WFO, US	daily high min	20.0 C (68.0 F)	1.7 C (3.1 F)	78 years	35 of 100 (Notable)
27 April 1977	Winkelman 6 S, US	daily high max	35.0 C (95.0 F)	1.7 C (3.1 F)	78 years	34 of 100 (Routine)
27 April 1977	Winnsboro 5 SSE, US	daily low min	7.2 C (45.0 F)	0.6 C (1.1 F)	83 years	34 of 100 (Routine)
27 April 1977	New England, US	daily high min	11.1 C (52.0 F)	1.1 C (2.0 F)	80 years	34 of 100 (Routine)
27 April 1977	Carey Downs, AU	daily rain	28.0 mm (1.1 in)	16.1 mm (0.6 in)	28 years	33 of 100 (Routine)
27 April 1977	Mansidao, BR	daily rain	68.6 mm (2.7 in)	52.1 mm (2.1 in)	3 years	33 of 100 (Routine)

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 801 records.

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

Records on 04-27 in each year
Year	Records
1795	1
1801	1
1802	2
1812	1
1814	1
1817	3
1828	1
1838	1
1841	1
1843	1
1852	1
1853	1
1855	1
1856	1
1857	1
1862	2
1873	2
1874	4
1879	1
1882	2
1884	2
1885	5
1887	1
1888	4
1890	3
1891	1
1892	3
1893	3
1894	7
1895	2
1896	3
1897	4
1899	5
1900	4
1901	3
1903	5
1904	11
1905	16
1906	13
1907	31
1908	27
1909	51
1910	8
1911	37
1912	5
1913	73
1914	19
1915	77
1916	36
1917	47
1918	55
1919	69
1920	44
1921	71
1922	151
1923	110
1924	103
1925	113
1926	287
1927	114
1928	404
1929	71
1930	80
1931	454
1932	331
1933	328
1934	275
1935	227
1936	97
1937	377
1938	467
1939	212
1940	268
1941	361
1942	569
1943	374
1944	214
1945	476
1946	512
1947	373
1948	535
1949	516
1950	617
1951	409
1952	722
1953	651
1954	875
1955	937
1956	685
1957	552
1958	461
1959	470
1960	684
1961	313
1962	741
1963	768
1964	711
1965	568
1966	1,282
1967	733
1968	372
1969	543
1970	1,142
1971	758
1972	645
1973	1,188
1974	926
1975	820
1976	810
1977	801
1978	694
1979	758
1980	706
1981	1,148
1982	685
1983	921
1984	1,754
1985	1,141
1986	1,225
1987	1,482
1988	893
1989	1,320
1990	1,321
1991	1,028
1992	2,163
1993	1,285
1994	1,614
1995	806
1996	1,034
1997	1,588
1998	872
1999	544
2000	1,171
2001	1,138
2002	1,024
2003	840
2004	937
2005	675
2006	705
2007	1,055
2008	1,032
2009	1,299
2010	751
2011	1,291
2012	1,015
2013	568
2014	656
2015	608
2016	755
2017	918
2018	407
2019	626
2020	497
2021	450
2022	567
2023	536
2024	574
2025	659
2026	450

Download the Data

Data for records on 1977-04-27: 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	590
50 to 100	5
100 to 150	1
150 to 200	0
200 to 250	1
250 to 300	2