Weather Records on 27 October 1971

1,157 weather records were set or tied worldwide on 27 October 1971. Highest significance: Castlewood, US.

Key Facts for 27 October 1971

On 27 October 1971, 1,157 weather records were set or tied at long-record stations worldwide.
402 were record highs and 285 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 45 monthly and 1,111 daily.
Castlewood set a daily record precipitation of 53.3 mm (2.1 in) on 27 October 1971.
Across 159 earlier years (1802 to 2025) the same calendar date averaged 474 records.

Record Map

1,157 stations

1,157 station records on 27 October 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 27 October 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Castlewood	United States	Record daily precipitation	53.3 mm (2.1 in)	62 of 100 (Major)
Milan 1NW	United States	Record daily precipitation	42.7 mm (1.7 in)	61 of 100 (Major)
Mora	United States	Record daily precipitation	59.9 mm (2.4 in)	61 of 100 (Major)
Granada Station	Australia	Record daily precipitation	34.0 mm (1.3 in)	60 of 100 (Major)
Clear Lake	United States	Record daily precipitation	43.4 mm (1.7 in)	60 of 100 (Major)
Wolsey	United States	Record daily precipitation	27.9 mm (1.1 in)	59 of 100 (Notable)
Grangeville	United States	Record daily snowfall	20.3 cm (8.0 in)	57 of 100 (Notable)
Academy 2NE	United States	Record daily precipitation	40.4 mm (1.6 in)	57 of 100 (Notable)
De Smet	United States	Record daily precipitation	48.3 mm (1.9 in)	57 of 100 (Notable)
Flandreau	United States	Record daily precipitation	40.6 mm (1.6 in)	57 of 100 (Notable)
Big Falls	United States	Record daily precipitation	39.6 mm (1.6 in)	56 of 100 (Notable)
Howard	United States	Record daily precipitation	53.3 mm (2.1 in)	55 of 100 (Notable)
Milford 4 NW	United States	Record daily precipitation	36.3 mm (1.4 in)	54 of 100 (Notable)
Canistota 2 N	United States	Record daily precipitation	34.8 mm (1.4 in)	54 of 100 (Notable)
Alexandria	United States	Record daily precipitation	58.4 mm (2.3 in)	53 of 100 (Notable)
Artichoke Lake 1 E	United States	Record daily precipitation	39.4 mm (1.6 in)	52 of 100 (Notable)
Maple Plain	United States	Record daily precipitation	64.3 mm (2.5 in)	52 of 100 (Notable)
Big Trout Lake	Canada	Record daily precipitation	34.3 mm (1.4 in)	51 of 100 (Notable)
Chaska	United States	Record daily precipitation	53.3 mm (2.1 in)	51 of 100 (Notable)
Gull Lake Dam	United States	Record daily precipitation	87.1 mm (3.4 in)	51 of 100 (Notable)
Winton Post Office	Australia	Record daily precipitation	26.2 mm (1.0 in)	50 of 100 (Notable)
Brookings 2 NE	United States	Record daily precipitation	30.7 mm (1.2 in)	50 of 100 (Notable)
Canby	United States	Record daily precipitation	36.6 mm (1.4 in)	48 of 100 (Notable)
Parkston 8 ENE	United States	Record daily precipitation	37.1 mm (1.5 in)	48 of 100 (Notable)
Wagner	United States	Record daily precipitation	46.5 mm (1.8 in)	48 of 100 (Notable)
Evanston 1 E	United States	Record daily snowfall	30.5 cm (12.0 in)	48 of 100 (Notable)
Leech Lake	United States	Record daily precipitation	61.7 mm (2.4 in)	47 of 100 (Notable)
Sandy Lake Dam Libby	United States	Record daily precipitation	59.7 mm (2.4 in)	47 of 100 (Notable)
Winnibigoshish Dam	United States	Record daily precipitation	70.1 mm (2.8 in)	47 of 100 (Notable)
Wentworth 2.5 WNW	United States	Record daily precipitation	52.6 mm (2.1 in)	47 of 100 (Notable)
Laketown	United States	Record daily snowfall	20.3 cm (8.0 in)	47 of 100 (Notable)
Red Lodge	United States	Record daily snowfall	30.5 cm (12.0 in)	46 of 100 (Notable)
Armour	United States	Record daily precipitation	36.3 mm (1.4 in)	46 of 100 (Notable)
Lifton Pumping STN	United States	Record daily snowfall	12.7 cm (5.0 in)	45 of 100 (Notable)
Grand Rapids Forestry Lab	United States	Record daily precipitation	68.1 mm (2.7 in)	45 of 100 (Notable)
Meadowlands 9 S	United States	Record daily precipitation	56.1 mm (2.2 in)	45 of 100 (Notable)
Prospect 2 SW	United States	Record daily snowfall	10.2 cm (4.0 in)	45 of 100 (Notable)
Arlington 1 W	United States	Record daily precipitation	45.7 mm (1.8 in)	44 of 100 (Notable)
Watertown Rgnl AP	United States	Record daily precipitation	32.3 mm (1.3 in)	44 of 100 (Notable)
Proa Station	Australia	Record daily precipitation	40.6 mm (1.6 in)	43 of 100 (Notable)
Sioux Lookout A	Canada	Record daily precipitation	47.5 mm (1.9 in)	43 of 100 (Notable)
Mapleton No.2	United States	Record daily precipitation	34.8 mm (1.4 in)	43 of 100 (Notable)
Madison Wwtp	United States	Record daily precipitation	45.7 mm (1.8 in)	43 of 100 (Notable)
Anatone	United States	Record daily snowfall	15.2 cm (6.0 in)	43 of 100 (Notable)
Alexandria Chandler Fld	United States	Record daily precipitation	53.1 mm (2.1 in)	43 of 100 (Notable)
Mount Isa Mine	Australia	Record daily precipitation	27.9 mm (1.1 in)	42 of 100 (Notable)
Lincoln College View	United States	Record daily precipitation	35.8 mm (1.4 in)	42 of 100 (Notable)
Ogden Pioneer Ph	United States	Record daily snowfall	7.6 cm (3.0 in)	42 of 100 (Notable)
Durham	Canada	Record high minimum temperature	11.1 C (52.0 F)	41 of 100 (Notable)
Bird Island	United States	Record daily precipitation	50.8 mm (2.0 in)	41 of 100 (Notable)
Crete 4ESE	United States	Record daily precipitation	27.9 mm (1.1 in)	41 of 100 (Notable)
Puyallup 2 W Exp STN	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Crandall Creek	United States	Record snow depth	40.6 cm (16.0 in)	41 of 100 (Notable)
Grangeville	United States	Record low minimum temperature	-12.2 C (10.0 F)	40 of 100 (Notable)
Newberry-Luce Co Rd Commission	United States	Record high minimum temperature	12.8 C (55.0 F)	40 of 100 (Notable)
Menno	United States	Record daily precipitation	30.0 mm (1.2 in)	40 of 100 (Notable)
Santa Rita de Cassia	Brazil	Record daily precipitation	49.8 mm (2.0 in)	39 of 100 (Notable)
White River	Canada	Record high minimum temperature	10.6 C (51.1 F)	39 of 100 (Notable)
Saint Maries	United States	Record daily snowfall	15.2 cm (6.0 in)	39 of 100 (Notable)
Little Falls 2NNE	United States	Record daily precipitation	66.8 mm (2.6 in)	39 of 100 (Notable)

Counts by Type and Timescale

1,157 records

Records set or tied on 27 October 1971 by type: Highest daily maximum 66, Lowest daily maximum 193, Highest daily minimum 336, Lowest daily minimum 92, Heaviest daily rainfall 349, Heaviest daily snowfall 98, Deepest snow cover 23.

Records on 27 October 1971 by type
Record type	Records
Highest daily maximum	66
Lowest daily maximum	193
Highest daily minimum	336
Lowest daily minimum	92
Heaviest daily rainfall	349
Heaviest daily snowfall	98
Deepest snow cover	23

Records on 27 October 1971 by timescale: all-time 1, monthly 45, daily 1,111.

How Much Records Were Beaten By

964 broken records

Margins by which the 964 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 195.0. Ties are not counted.

Top 20 by Significance

27 October 1971

Top 20 records on 27 October 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 October 1971	Castlewood, US	daily rain	53.3 mm (2.1 in)	46.2 mm (1.8 in)	52 years	62 of 100 (Major)
27 October 1971	Milan 1NW, US	daily rain	42.7 mm (1.7 in)	28.7 mm (1.1 in)	70 years	61 of 100 (Major)
27 October 1971	Mora, US	daily rain	59.9 mm (2.4 in)	39.1 mm (1.5 in)	52 years	61 of 100 (Major)
27 October 1971	Granada Station, AU	daily rain	34.0 mm (1.3 in)	34.0 mm (1.3 in)	82 years	60 of 100 (Major)
27 October 1971	Clear Lake, US	daily rain	43.4 mm (1.7 in)	32.0 mm (1.3 in)	64 years	60 of 100 (Major)
27 October 1971	Wolsey, US	daily rain	27.9 mm (1.1 in)	26.4 mm (1.0 in)	77 years	59 of 100 (Notable)
27 October 1971	Grangeville, US	daily snowfall	20.3 cm (8.0 in)	19.0 cm (7.5 in)	41 years	57 of 100 (Notable)
27 October 1971	Academy 2NE, US	daily rain	40.4 mm (1.6 in)	35.3 mm (1.4 in)	45 years	57 of 100 (Notable)
27 October 1971	De Smet, US	daily rain	48.3 mm (1.9 in)	42.7 mm (1.7 in)	52 years	57 of 100 (Notable)
27 October 1971	Flandreau, US	daily rain	40.6 mm (1.6 in)	31.7 mm (1.2 in)	52 years	57 of 100 (Notable)
27 October 1971	Big Falls, US	daily rain	39.6 mm (1.6 in)	39.6 mm (1.6 in)	40 years	56 of 100 (Notable)
27 October 1971	Howard, US	daily rain	53.3 mm (2.1 in)	45.7 mm (1.8 in)	29 years	55 of 100 (Notable)
27 October 1971	Milford 4 NW, US	daily rain	36.3 mm (1.4 in)	30.2 mm (1.2 in)	45 years	54 of 100 (Notable)
27 October 1971	Canistota 2 N, US	daily rain	34.8 mm (1.4 in)	28.4 mm (1.1 in)	45 years	54 of 100 (Notable)
27 October 1971	Alexandria, US	daily rain	58.4 mm (2.3 in)	28.4 mm (1.1 in)	73 years	53 of 100 (Notable)
27 October 1971	Artichoke Lake 1 E, US	daily rain	39.4 mm (1.6 in)	29.2 mm (1.1 in)	40 years	52 of 100 (Notable)
27 October 1971	Maple Plain, US	daily rain	64.3 mm (2.5 in)	30.8 mm (1.2 in)	52 years	52 of 100 (Notable)
27 October 1971	Big Trout Lake, CA	daily rain	34.3 mm (1.4 in)	21.6 mm (0.9 in)	28 years	51 of 100 (Notable)
27 October 1971	Chaska, US	daily rain	53.3 mm (2.1 in)	47.2 mm (1.9 in)	24 years	51 of 100 (Notable)
27 October 1971	Gull Lake Dam, US	monthly rain	87.1 mm (3.4 in)	17.0 mm (0.7 in)	56 years	51 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

1802 to 1971

Records set or tied on this calendar date in each year from 1802 to 1971. 1971 had 1,157 records.

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

Records on 10-27 in each year
Year	Records
1802	1
1807	1
1816	1
1831	1
1838	1
1840	1
1841	2
1847	2
1849	2
1856	2
1861	1
1866	4
1869	4
1870	2
1871	2
1873	1
1874	2
1876	1
1878	1
1880	2
1881	2
1885	2
1886	2
1887	5
1888	3
1889	1
1890	2
1892	3
1893	2
1894	2
1895	3
1896	2
1898	4
1899	14
1900	9
1901	5
1902	8
1903	23
1904	6
1905	11
1906	11
1907	9
1908	16
1909	13
1910	14
1911	20
1912	42
1913	91
1914	54
1915	65
1916	28
1917	45
1918	77
1919	74
1920	98
1921	37
1922	97
1923	63
1924	104
1925	383
1926	176
1927	521
1928	162
1929	92
1930	158
1931	241
1932	319
1933	313
1934	173
1935	266
1936	725
1937	477
1938	160
1939	836
1940	605
1941	409
1942	629
1943	479
1944	519
1945	674
1946	450
1947	551
1948	160
1949	182
1950	603
1951	269
1952	640
1953	285
1954	493
1955	578
1956	339
1957	1,116
1958	163
1959	376
1960	180
1961	428
1962	704
1963	798
1964	294
1965	284
1966	256
1967	485
1968	436
1969	532
1970	1,071
1971	1,157
1972	694
1973	719
1974	384
1975	424
1976	1,387
1977	608
1978	593
1979	553
1980	1,148
1981	1,076
1982	793
1983	707
1984	1,183
1985	592
1986	531
1987	863
1988	829
1989	1,506
1990	441
1991	1,722
1992	703
1993	667
1994	894
1995	1,238
1996	1,651
1997	2,783
1998	1,696
1999	991
2000	832
2001	1,100
2002	1,040
2003	1,669
2004	1,546
2005	897
2006	1,442
2007	950
2008	650
2009	954
2010	1,676
2011	690
2012	991
2013	706
2014	973
2015	395
2016	761
2017	582
2018	701
2019	1,364
2020	2,886
2021	536
2022	657
2023	1,668
2024	694
2025	524

Download the Data

Data for records on 1971-10-27: 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 25	845
25 to 50	75
50 to 75	21
75 to 100	14
100 to 125	5
125 to 150	1
150 to 175	0
175 to 200	3