Weather Records on 18 October 1971

1,199 weather records were set or tied worldwide on 18 October 1971. Highest significance: Killdeer 8 NW, US.

Key Facts for 18 October 1971

On 18 October 1971, 1,199 weather records were set or tied at long-record stations worldwide.
443 were record highs and 334 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 26 monthly and 1,173 daily.
Killdeer 8 NW set a daily record precipitation of 26.7 mm (1.1 in) on 18 October 1971.
Across 167 earlier years (1794 to 2025) the same calendar date averaged 429 records.

Record Map

1,199 stations

1,199 station records on 18 October 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 October 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Killdeer 8 NW	United States	Record daily precipitation	26.7 mm (1.1 in)	69 of 100 (Major)
Red Rvr	United States	Record daily snowfall	30.5 cm (12.0 in)	61 of 100 (Major)
Miles City	United States	Record daily precipitation	44.2 mm (1.7 in)	58 of 100 (Notable)
Basin	United States	Record daily precipitation	30.2 mm (1.2 in)	57 of 100 (Notable)
Fort Qu'appelle	Canada	Record daily precipitation	27.9 mm (1.1 in)	56 of 100 (Notable)
Wilton	United States	Record daily precipitation	40.6 mm (1.6 in)	56 of 100 (Notable)
Farmingdale 4 N	United States	Record daily precipitation	28.4 mm (1.1 in)	56 of 100 (Notable)
Marcelino Vieira (Panatis)	Brazil	Record daily precipitation	48.2 mm (1.9 in)	54 of 100 (Notable)
Midale	Canada	Record daily precipitation	43.2 mm (1.7 in)	52 of 100 (Notable)
McNary 2N	United States	Record snow depth	38.1 cm (15.0 in)	52 of 100 (Notable)
Willow City	United States	Record daily precipitation	34.5 mm (1.4 in)	52 of 100 (Notable)
Cottonwood 2 E	United States	Record daily precipitation	35.6 mm (1.4 in)	52 of 100 (Notable)
Lost River	Canada	Record daily precipitation	25.9 mm (1.0 in)	51 of 100 (Notable)
Stratton	United States	Record daily precipitation	54.9 mm (2.2 in)	51 of 100 (Notable)
Lumsden	Canada	Record daily precipitation	34.3 mm (1.4 in)	50 of 100 (Notable)
Bradford	United Kingdom	Record daily precipitation	38.6 mm (1.5 in)	50 of 100 (Notable)
Poplar 2 E	United States	Record daily precipitation	32.5 mm (1.3 in)	50 of 100 (Notable)
Kendall	United States	Record daily snowfall	20.3 cm (8.0 in)	50 of 100 (Notable)
Mamanguape	Brazil	Record daily precipitation	35.1 mm (1.4 in)	49 of 100 (Notable)
Miles City AP	United States	Record daily precipitation	47.8 mm (1.9 in)	49 of 100 (Notable)
Midwest	United States	Record daily precipitation	29.5 mm (1.2 in)	48 of 100 (Notable)
Ceylon	Canada	Record daily precipitation	46.2 mm (1.8 in)	47 of 100 (Notable)
Boissevain	Canada	Record daily precipitation	37.8 mm (1.5 in)	47 of 100 (Notable)
Lincoln 1 SE	United States	Record daily precipitation	70.1 mm (2.8 in)	47 of 100 (Notable)
Vida 6 NE	United States	Record daily precipitation	43.2 mm (1.7 in)	47 of 100 (Notable)
Rugby	United States	Record daily precipitation	34.3 mm (1.4 in)	47 of 100 (Notable)
Turtle Lake	United States	Record daily precipitation	29.7 mm (1.2 in)	47 of 100 (Notable)
Brejo da Madre de Deus	Brazil	Record daily precipitation	44.2 mm (1.7 in)	46 of 100 (Notable)
Indian Head Cda	Canada	Record daily precipitation	29.2 mm (1.1 in)	46 of 100 (Notable)
Swan River	Canada	Record daily precipitation	28.2 mm (1.1 in)	46 of 100 (Notable)
Hebron	United States	Record daily precipitation	47.0 mm (1.9 in)	45 of 100 (Notable)
Drake	United States	Record daily precipitation	27.7 mm (1.1 in)	45 of 100 (Notable)
Grenfell	Canada	Record daily precipitation	28.7 mm (1.1 in)	44 of 100 (Notable)
Strasbourg	Canada	Record daily precipitation	27.7 mm (1.1 in)	44 of 100 (Notable)
Snowflake	United States	Record daily snowfall	7.6 cm (3.0 in)	44 of 100 (Notable)
Springerville	United States	Record daily snowfall	10.2 cm (4.0 in)	44 of 100 (Notable)
Dupree	United States	Record daily precipitation	26.7 mm (1.1 in)	44 of 100 (Notable)
Cypress River	Canada	Record daily precipitation	28.4 mm (1.1 in)	43 of 100 (Notable)
Carlisle 1 SW	United States	Record daily precipitation	66.0 mm (2.6 in)	43 of 100 (Notable)
Yellow Grass	Canada	Record daily precipitation	42.9 mm (1.7 in)	42 of 100 (Notable)
Beloit	United States	Record daily precipitation	56.4 mm (2.2 in)	42 of 100 (Notable)
Ogallala	United States	Record daily precipitation	27.9 mm (1.1 in)	42 of 100 (Notable)
Worland	United States	Record daily precipitation	27.4 mm (1.1 in)	42 of 100 (Notable)
Conda	United States	Record daily precipitation	27.4 mm (1.1 in)	41 of 100 (Notable)
Belleville	United States	Record daily precipitation	77.5 mm (3.1 in)	41 of 100 (Notable)
Claflin	United States	Record daily precipitation	71.9 mm (2.8 in)	41 of 100 (Notable)
Busby	United States	Record daily precipitation	31.8 mm (1.3 in)	41 of 100 (Notable)
Lame Deer	United States	Record daily precipitation	35.3 mm (1.4 in)	41 of 100 (Notable)
Western 2W	United States	Record daily precipitation	36.8 mm (1.4 in)	40 of 100 (Notable)
Beaver Canyon Pwr House	United States	Record daily snowfall	14.0 cm (5.5 in)	40 of 100 (Notable)
Sugar City	United States	Record daily snowfall	7.6 cm (3.0 in)	39 of 100 (Notable)
Timber Lake	United States	Record daily precipitation	26.2 mm (1.0 in)	39 of 100 (Notable)
Alta 1 NNW	United States	Record daily precipitation	27.9 mm (1.1 in)	39 of 100 (Notable)
Holbrook	United States	Record low maximum temperature	8.3 C (46.9 F)	38 of 100 (Notable)
Pinal Rch	United States	Record daily precipitation	36.3 mm (1.4 in)	38 of 100 (Notable)
Ft Ross	United States	Record low minimum temperature	3.9 C (39.0 F)	38 of 100 (Notable)
Hickman	United States	Record daily precipitation	27.4 mm (1.1 in)	38 of 100 (Notable)
Palisade	United States	Record daily precipitation	44.5 mm (1.8 in)	38 of 100 (Notable)
Colstrip	United States	Record daily precipitation	49.8 mm (2.0 in)	37 of 100 (Notable)
Blair	United States	Record daily precipitation	25.7 mm (1.0 in)	37 of 100 (Notable)

Counts by Type and Timescale

1,199 records

Records set or tied on 18 October 1971 by type: Highest daily maximum 20, Lowest daily maximum 217, Highest daily minimum 423, Lowest daily minimum 117, Heaviest daily rainfall 364, Heaviest daily snowfall 46, Deepest snow cover 12.

Records on 18 October 1971 by type
Record type	Records
Highest daily maximum	20
Lowest daily maximum	217
Highest daily minimum	423
Lowest daily minimum	117
Heaviest daily rainfall	364
Heaviest daily snowfall	46
Deepest snow cover	12

Records on 18 October 1971 by timescale: all-time 0, monthly 26, daily 1,173.

How Much Records Were Beaten By

977 broken records

Margins by which the 977 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

18 October 1971

Top 20 records on 18 October 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 October 1971	Killdeer 8 NW, US	daily rain	26.7 mm (1.1 in)	21.6 mm (0.9 in)	77 years	69 of 100 (Major)
18 October 1971	Red Rvr, US	daily snowfall	30.5 cm (12.0 in)	25.4 cm (10.0 in)	53 years	61 of 100 (Major)
18 October 1971	Miles City, US	daily rain	44.2 mm (1.7 in)	22.4 mm (0.9 in)	38 years	58 of 100 (Notable)
18 October 1971	Basin, US	daily rain	30.2 mm (1.2 in)	20.3 mm (0.8 in)	46 years	57 of 100 (Notable)
18 October 1971	Fort Qu'appelle, CA	daily rain	27.9 mm (1.1 in)	23.8 mm (0.9 in)	33 years	56 of 100 (Notable)
18 October 1971	Wilton, US	daily rain	40.6 mm (1.6 in)	35.5 mm (1.4 in)	42 years	56 of 100 (Notable)
18 October 1971	Farmingdale 4 N, US	daily rain	28.4 mm (1.1 in)	23.6 mm (0.9 in)	65 years	56 of 100 (Notable)
18 October 1971	Marcelino Vieira (Panatis), BR	daily rain	48.2 mm (1.9 in)	48.2 mm (1.9 in)	36 years	54 of 100 (Notable)
18 October 1971	Midale, CA	daily rain	43.2 mm (1.7 in)	31.5 mm (1.2 in)	25 years	52 of 100 (Notable)
18 October 1971	McNary 2N, US	daily snow depth	38.1 cm (15.0 in)	38.1 cm (15.0 in)	37 years	52 of 100 (Notable)
18 October 1971	Willow City, US	daily rain	34.5 mm (1.4 in)	23.8 mm (0.9 in)	25 years	52 of 100 (Notable)
18 October 1971	Cottonwood 2 E, US	daily rain	35.6 mm (1.4 in)	30.5 mm (1.2 in)	29 years	52 of 100 (Notable)
18 October 1971	Lost River, CA	daily rain	25.9 mm (1.0 in)	17.3 mm (0.7 in)	44 years	51 of 100 (Notable)
18 October 1971	Stratton, US	daily rain	54.9 mm (2.2 in)	27.5 mm (1.1 in)	66 years	51 of 100 (Notable)
18 October 1971	Lumsden, CA	daily rain	34.3 mm (1.4 in)	26.7 mm (1.1 in)	20 years	50 of 100 (Notable)
18 October 1971	Bradford, GB	daily rain	38.6 mm (1.5 in)	25.9 mm (1.0 in)	16 years	50 of 100 (Notable)
18 October 1971	Poplar 2 E, US	daily rain	32.5 mm (1.3 in)	18.5 mm (0.7 in)	37 years	50 of 100 (Notable)
18 October 1971	Kendall, US	daily snowfall	20.3 cm (8.0 in)	17.8 cm (7.0 in)	38 years	50 of 100 (Notable)
18 October 1971	Mamanguape, BR	daily rain	35.1 mm (1.4 in)	19.0 mm (0.7 in)	21 years	49 of 100 (Notable)
18 October 1971	Miles City AP, US	daily rain	47.8 mm (1.9 in)	37.6 mm (1.5 in)	21 years	49 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

1794 to 1971

Records set or tied on this calendar date in each year from 1794 to 1971. 1971 had 1,199 records.

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

Records on 10-18 in each year
Year	Records
1794	1
1796	1
1799	1
1806	1
1807	1
1810	1
1811	2
1817	1
1832	1
1835	1
1836	1
1843	1
1846	2
1848	1
1849	1
1851	1
1852	1
1859	1
1863	1
1865	2
1866	2
1868	1
1869	1
1871	1
1872	1
1874	4
1876	2
1877	2
1879	3
1881	1
1882	1
1883	2
1887	1
1888	1
1890	4
1892	4
1893	1
1894	3
1895	2
1897	6
1898	5
1899	12
1900	5
1901	5
1902	6
1903	9
1904	12
1905	27
1906	17
1907	11
1908	44
1909	23
1910	50
1911	22
1912	12
1913	26
1914	52
1915	12
1916	64
1917	109
1918	24
1919	31
1920	87
1921	87
1922	59
1923	114
1924	151
1925	153
1926	149
1927	309
1928	316
1929	190
1930	507
1931	350
1932	446
1933	264
1934	222
1935	360
1936	483
1937	671
1938	536
1939	475
1940	532
1941	240
1942	332
1943	844
1944	264
1945	398
1946	355
1947	965
1948	1,128
1949	665
1950	996
1951	325
1952	394
1953	678
1954	621
1955	403
1956	578
1957	220
1958	407
1959	246
1960	612
1961	362
1962	252
1963	492
1964	311
1965	1,066
1966	613
1967	405
1968	737
1969	789
1970	501
1971	1,199
1972	1,581
1973	789
1974	746
1975	779
1976	1,326
1977	533
1978	545
1979	555
1980	1,024
1981	680
1982	654
1983	684
1984	1,331
1985	831
1986	344
1987	518
1988	733
1989	1,196
1990	1,043
1991	999
1992	1,295
1993	1,051
1994	1,296
1995	1,227
1996	795
1997	1,240
1998	1,323
1999	773
2000	823
2001	818
2002	878
2003	1,097
2004	1,156
2005	755
2006	1,328
2007	1,298
2008	531
2009	1,546
2010	634
2011	736
2012	741
2013	430
2014	690
2015	915
2016	1,511
2017	590
2018	759
2019	346
2020	957
2021	387
2022	1,334
2023	693
2024	1,142
2025	367

Download the Data

Data for records on 1971-10-18: 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	953
50 to 100	15
100 to 150	6
150 to 200	1
200 to 250	0
250 to 300	1
300 to 350	0
350 to 400	1