Weather Records on 27 April 1970

1,142 weather records were set or tied worldwide on 27 April 1970. Highest significance: Grangeville, US.

Key Facts for 27 April 1970

On 27 April 1970, 1,142 weather records were set or tied at long-record stations worldwide.
503 were record highs and 267 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 42 monthly and 1,099 daily.
Grangeville set a daily record snowfall of 12.7 cm (5.0 in) on 27 April 1970.
Across 158 earlier years (1795 to 2026) the same calendar date averaged 471 records.

Record Map

1,142 stations

1,142 station records on 27 April 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 April 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Grangeville	United States	Record daily snowfall	12.7 cm (5.0 in)	56 of 100 (Notable)
Ibapah	United States	Record daily snowfall	25.4 cm (10.0 in)	56 of 100 (Notable)
Segen-Kyuel	Russia	Record daily precipitation	33.3 mm (1.3 in)	55 of 100 (Notable)
Manti	United States	Record daily snowfall	10.2 cm (4.0 in)	53 of 100 (Notable)
Lake St Clair (Hec)	Australia	Record daily precipitation	55.9 mm (2.2 in)	50 of 100 (Notable)
Fillmore	United States	Record daily snowfall	20.3 cm (8.0 in)	50 of 100 (Notable)
Deseret	United States	Record daily snowfall	10.2 cm (4.0 in)	49 of 100 (Notable)
Coalville	United States	Record daily precipitation	28.2 mm (1.1 in)	49 of 100 (Notable)
Tooele	United States	Record daily snowfall	15.2 cm (6.0 in)	47 of 100 (Notable)
Sierraville Rs	United States	Record daily snowfall	17.8 cm (7.0 in)	46 of 100 (Notable)
Officer (Jesmond Dene)	Australia	Record daily precipitation	30.0 mm (1.2 in)	45 of 100 (Notable)
Williamston 1 E	United States	Record daily precipitation	71.1 mm (2.8 in)	45 of 100 (Notable)
Cottonwood Weir	United States	Record daily precipitation	35.6 mm (1.4 in)	45 of 100 (Notable)
Ely AP	United States	Record snow depth	17.8 cm (7.0 in)	45 of 100 (Notable)
Cambridge	United States	Record daily snowfall	7.6 cm (3.0 in)	44 of 100 (Notable)
Cottonwood Weir	United States	Record daily snowfall	27.9 cm (11.0 in)	44 of 100 (Notable)
Cape Jaffa (Jaffa Hills)	Australia	Record daily precipitation	37.3 mm (1.5 in)	43 of 100 (Notable)
Elderslie	Australia	Record daily precipitation	36.3 mm (1.4 in)	43 of 100 (Notable)
College Hill Lock 11	United States	Record daily precipitation	55.9 mm (2.2 in)	43 of 100 (Notable)
Summit	United States	Record daily precipitation	30.2 mm (1.2 in)	43 of 100 (Notable)
Orovada 3 W	United States	Record daily snowfall	10.2 cm (4.0 in)	43 of 100 (Notable)
St Andrews	Canada	Record high maximum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Babb 6 NE	United States	Record daily precipitation	35.6 mm (1.4 in)	42 of 100 (Notable)
Levan	United States	Record daily snowfall	8.9 cm (3.5 in)	42 of 100 (Notable)
Corinne	United States	Record daily snowfall	7.6 cm (3.0 in)	41 of 100 (Notable)
Doorawarrah	Australia	Record daily precipitation	28.7 mm (1.1 in)	40 of 100 (Notable)
Pioneer (Main Road)	Australia	Record daily precipitation	41.1 mm (1.6 in)	40 of 100 (Notable)
Quincy	United States	Record daily snowfall	11.4 cm (4.5 in)	40 of 100 (Notable)
Summit	United States	Record daily snowfall	43.2 cm (17.0 in)	40 of 100 (Notable)
Cradle Valley (Waldheim)	Australia	Record daily precipitation	76.2 mm (3.0 in)	39 of 100 (Notable)
St Andrews	Canada	Record high minimum temperature	8.9 C (48.0 F)	39 of 100 (Notable)
Schierke	Germany	Record snow depth	43.0 cm (16.9 in)	39 of 100 (Notable)
Tooele	United States	Record daily precipitation	26.2 mm (1.0 in)	39 of 100 (Notable)
Calgary Int'l A	Canada	Record daily snowfall	17.8 cm (7.0 in)	38 of 100 (Notable)
Malad	United States	Record daily snowfall	5.1 cm (2.0 in)	38 of 100 (Notable)
Valier	United States	Record daily snowfall	15.2 cm (6.0 in)	38 of 100 (Notable)
Hatch	United States	Record daily snowfall	10.2 cm (4.0 in)	38 of 100 (Notable)
Saint Bernard	United States	Record daily precipitation	67.8 mm (2.7 in)	37 of 100 (Notable)
Brigham City	United States	Record daily snowfall	7.6 cm (3.0 in)	37 of 100 (Notable)
Elberta	United States	Record daily snowfall	6.4 cm (2.5 in)	37 of 100 (Notable)
Grantsville 2W	United States	Record daily precipitation	26.2 mm (1.0 in)	37 of 100 (Notable)
Morgan	United States	Record daily snowfall	17.8 cm (7.0 in)	37 of 100 (Notable)
Oak City	United States	Record daily snowfall	7.6 cm (3.0 in)	37 of 100 (Notable)
Flagstaff AP	United States	Record daily snowfall	11.2 cm (4.4 in)	37 of 100 (Notable)
Vaduj	India	Record daily precipitation	36.0 mm (1.4 in)	36 of 100 (Notable)
Tuscola	United States	Record daily precipitation	47.8 mm (1.9 in)	36 of 100 (Notable)
Spencer 1 N	United States	Record high minimum temperature	18.9 C (66.0 F)	35 of 100 (Notable)
South Springfield (South Sprin	Australia	Record daily precipitation	35.6 mm (1.4 in)	34 of 100 (Routine)
Tarraleah Village	Australia	Record daily precipitation	36.1 mm (1.4 in)	34 of 100 (Routine)
Evergreen	United States	Record high minimum temperature	22.8 C (73.0 F)	34 of 100 (Routine)
Bastrop	United States	Record high minimum temperature	22.2 C (72.0 F)	34 of 100 (Routine)
Gothenburg	United States	Record high minimum temperature	15.6 C (60.1 F)	34 of 100 (Routine)
Crockett	United States	Record high minimum temperature	22.8 C (73.0 F)	34 of 100 (Routine)
Denison (Wandocka State School	Australia	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)
Gardiner	United States	Record high maximum temperature	27.8 C (82.0 F)	33 of 100 (Routine)
Midvale	United States	Record daily snowfall	7.6 cm (3.0 in)	33 of 100 (Routine)
Ellensburg	United States	Record low minimum temperature	-6.7 C (19.9 F)	33 of 100 (Routine)
Coalville	United States	Record daily snowfall	20.3 cm (8.0 in)	33 of 100 (Routine)
St Margaret's Bay	Canada	Record high maximum temperature	25.6 C (78.1 F)	32 of 100 (Routine)
Ocampo	Mexico	Record high minimum temperature	18.9 C (66.0 F)	32 of 100 (Routine)

Counts by Type and Timescale

1,142 records

Records set or tied on 27 April 1970 by type: Highest daily maximum 203, Lowest daily maximum 147, Highest daily minimum 300, Lowest daily minimum 120, Heaviest daily rainfall 260, Heaviest daily snowfall 84, Deepest snow cover 28.

Records on 27 April 1970 by type
Record type	Records
Highest daily maximum	203
Lowest daily maximum	147
Highest daily minimum	300
Lowest daily minimum	120
Heaviest daily rainfall	260
Heaviest daily snowfall	84
Deepest snow cover	28

Records on 27 April 1970 by timescale: all-time 1, monthly 42, daily 1,099.

How Much Records Were Beaten By

896 broken records

Margins by which the 896 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1200.0. Ties are not counted.

Top 20 by Significance

27 April 1970

Top 20 records on 27 April 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 April 1970	Grangeville, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	75 years	56 of 100 (Notable)
27 April 1970	Ibapah, US	daily snowfall	25.4 cm (10.0 in)	25.4 cm (10.0 in)	53 years	56 of 100 (Notable)
27 April 1970	Segen-Kyuel, RU	monthly rain	33.3 mm (1.3 in)	16.1 mm (0.6 in)	9 years	55 of 100 (Notable)
27 April 1970	Manti, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	73 years	53 of 100 (Notable)
27 April 1970	Lake St Clair (Hec), AU	daily rain	55.9 mm (2.2 in)	36.6 mm (1.4 in)	32 years	50 of 100 (Notable)
27 April 1970	Fillmore, US	daily snowfall	20.3 cm (8.0 in)	20.3 cm (8.0 in)	53 years	50 of 100 (Notable)
27 April 1970	Deseret, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	69 years	49 of 100 (Notable)
27 April 1970	Coalville, US	daily rain	28.2 mm (1.1 in)	18.0 mm (0.7 in)	8 years	49 of 100 (Notable)
27 April 1970	Tooele, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	53 years	47 of 100 (Notable)
27 April 1970	Sierraville Rs, US	daily snowfall	17.8 cm (7.0 in)	17.8 cm (7.0 in)	60 years	46 of 100 (Notable)
27 April 1970	Officer (Jesmond Dene), AU	daily rain	30.0 mm (1.2 in)	13.2 mm (0.5 in)	72 years	45 of 100 (Notable)
27 April 1970	Williamston 1 E, US	daily rain	71.1 mm (2.8 in)	43.4 mm (1.7 in)	17 years	45 of 100 (Notable)
27 April 1970	Cottonwood Weir, US	daily rain	35.6 mm (1.4 in)	30.3 mm (1.2 in)	7 years	45 of 100 (Notable)
27 April 1970	Ely AP, US	monthly snow depth	17.8 cm (7.0 in)	2.6 cm (1.0 in)	70 years	45 of 100 (Notable)
27 April 1970	Cambridge, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	75 years	44 of 100 (Notable)
27 April 1970	Cottonwood Weir, US	daily snowfall	27.9 cm (11.0 in)	26.6 cm (10.5 in)	15 years	44 of 100 (Notable)
27 April 1970	Cape Jaffa (Jaffa Hills), AU	daily rain	37.3 mm (1.5 in)	24.6 mm (1.0 in)	7 years	43 of 100 (Notable)
27 April 1970	Elderslie, AU	daily rain	36.3 mm (1.4 in)	20.8 mm (0.8 in)	17 years	43 of 100 (Notable)
27 April 1970	College Hill Lock 11, US	daily rain	55.9 mm (2.2 in)	36.8 mm (1.4 in)	12 years	43 of 100 (Notable)
27 April 1970	Summit, US	daily rain	30.2 mm (1.2 in)	20.0 mm (0.8 in)	11 years	43 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 1970

Records set or tied on this calendar date in each year from 1795 to 1970. 1970 had 1,142 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 1970-04-27: 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 200	887
200 to 400	8
400 to 600	0
600 to 800	0
800 to 1000	0
1000 to 1200	1