Weather Records on 15 October 1984

1,236 weather records were set or tied worldwide on 15 October 1984. Highest significance: Mayville, US.

Key Facts for 15 October 1984

On 15 October 1984, 1,236 weather records were set or tied at long-record stations worldwide.
213 were record highs and 385 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 32 monthly and 1,204 daily.
Mayville set a daily record precipitation of 56.1 mm (2.2 in) on 15 October 1984.
Across 159 earlier years (1794 to 2025) the same calendar date averaged 455 records.

Record Map

1,236 stations

1,236 station records on 15 October 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 October 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mayville	United States	Record daily precipitation	56.1 mm (2.2 in)	74 of 100 (Major)
Clayton Muni Air Pk	United States	Record daily snowfall	15.2 cm (6.0 in)	71 of 100 (Major)
Park River	United States	Record daily precipitation	42.7 mm (1.7 in)	63 of 100 (Major)
Little Falls 2NNE	United States	Record daily precipitation	56.4 mm (2.2 in)	59 of 100 (Notable)
Greenville	United States	Record daily precipitation	78.2 mm (3.1 in)	57 of 100 (Notable)
Walker	United States	Record daily precipitation	55.4 mm (2.2 in)	57 of 100 (Notable)
Fremont	United States	Record daily precipitation	75.2 mm (3.0 in)	57 of 100 (Notable)
Grafton	United States	Record daily precipitation	52.3 mm (2.1 in)	57 of 100 (Notable)
Brainerd	United States	Record daily precipitation	57.2 mm (2.3 in)	56 of 100 (Notable)
Atlantic 1 NE	United States	Record daily precipitation	44.7 mm (1.8 in)	54 of 100 (Notable)
Boone	United States	Record daily precipitation	44.2 mm (1.7 in)	54 of 100 (Notable)
Itasca UNIV of Minn	United States	Record daily precipitation	40.1 mm (1.6 in)	53 of 100 (Notable)
Arlington 1 W	United States	Record daily precipitation	55.4 mm (2.2 in)	53 of 100 (Notable)
Sac City	United States	Record daily precipitation	58.4 mm (2.3 in)	52 of 100 (Notable)
Gull Lake Dam	United States	Record daily precipitation	44.5 mm (1.8 in)	52 of 100 (Notable)
Ottertail	United States	Record daily precipitation	59.4 mm (2.3 in)	52 of 100 (Notable)
Wahoo	United States	Record daily precipitation	67.3 mm (2.6 in)	52 of 100 (Notable)
Brookings 2 NE	United States	Record daily precipitation	49.5 mm (1.9 in)	52 of 100 (Notable)
Hot Springs 1 NNE	United States	Record daily precipitation	81.5 mm (3.2 in)	51 of 100 (Notable)
Crookston NW Exp STN	United States	Record daily precipitation	26.7 mm (1.1 in)	51 of 100 (Notable)
Rugby	United States	Record daily precipitation	32.3 mm (1.3 in)	51 of 100 (Notable)
Estherville 4E	United States	Record daily precipitation	30.0 mm (1.2 in)	50 of 100 (Notable)
Grand Forks UNIV (NWS)	United States	Record daily precipitation	36.3 mm (1.4 in)	50 of 100 (Notable)
Utica	United States	Record daily precipitation	39.6 mm (1.6 in)	49 of 100 (Notable)
Guffey 10 SE	United States	Record snow depth	17.8 cm (7.0 in)	48 of 100 (Notable)
Elbow Lake 5 E	United States	Record daily precipitation	38.4 mm (1.5 in)	48 of 100 (Notable)
Carroll	United States	Record daily precipitation	39.4 mm (1.6 in)	47 of 100 (Notable)
Clarinda	United States	Record daily precipitation	59.7 mm (2.4 in)	47 of 100 (Notable)
Ft Ripley	United States	Record daily precipitation	39.4 mm (1.6 in)	47 of 100 (Notable)
Bozeman Montana State UNIV	United States	Record snow depth	12.7 cm (5.0 in)	47 of 100 (Notable)
Idalia	United States	Record daily snowfall	15.2 cm (6.0 in)	46 of 100 (Notable)
Titonka	United States	Record daily precipitation	50.8 mm (2.0 in)	46 of 100 (Notable)
Canby	United States	Record daily precipitation	54.6 mm (2.1 in)	46 of 100 (Notable)
Hankinson	United States	Record daily precipitation	40.6 mm (1.6 in)	46 of 100 (Notable)
Welverdiend (Pol)	South Africa	Record daily precipitation	40.0 mm (1.6 in)	45 of 100 (Notable)
Guthrie Ctr	United States	Record daily precipitation	41.9 mm (1.6 in)	45 of 100 (Notable)
Jefferson	United States	Record daily precipitation	38.4 mm (1.5 in)	45 of 100 (Notable)
Cass Lake	United States	Record daily precipitation	44.7 mm (1.8 in)	45 of 100 (Notable)
Superior	United States	Record daily precipitation	31.0 mm (1.2 in)	45 of 100 (Notable)
Cimarron 4 SW	United States	Record daily snowfall	5.6 cm (2.2 in)	45 of 100 (Notable)
Sharon	United States	Record daily precipitation	36.8 mm (1.4 in)	45 of 100 (Notable)
Milbank 4 NW	United States	Record daily precipitation	52.6 mm (2.1 in)	45 of 100 (Notable)
Tooele	United States	Record daily snowfall	12.7 cm (5.0 in)	45 of 100 (Notable)
Rico	United States	Record daily snowfall	19.1 cm (7.5 in)	44 of 100 (Notable)
Bemidji	United States	Record daily precipitation	51.3 mm (2.0 in)	44 of 100 (Notable)
Mahnomen	United States	Record daily precipitation	44.5 mm (1.8 in)	44 of 100 (Notable)
Pine Rvr Dam	United States	Record daily precipitation	41.9 mm (1.6 in)	44 of 100 (Notable)
David City 4E	United States	Record daily precipitation	31.0 mm (1.2 in)	44 of 100 (Notable)
Flandreau	United States	Record daily precipitation	50.3 mm (2.0 in)	44 of 100 (Notable)
Redwood Falls Muni AP	United States	Record daily precipitation	36.1 mm (1.4 in)	44 of 100 (Notable)
Colorado Springs Muni AP	United States	Record daily snowfall	23.4 cm (9.2 in)	44 of 100 (Notable)
Blakely Mtn Dam	United States	Record daily precipitation	99.1 mm (3.9 in)	43 of 100 (Notable)
Corning	United States	Record daily precipitation	39.6 mm (1.6 in)	43 of 100 (Notable)
Ft Dodge 5NNW	United States	Record daily precipitation	62.2 mm (2.4 in)	43 of 100 (Notable)
Bozeman Montana State UNIV	United States	Record daily snowfall	11.9 cm (4.7 in)	43 of 100 (Notable)
Ashland #2	United States	Record daily precipitation	44.7 mm (1.8 in)	43 of 100 (Notable)
Tekamah	United States	Record daily precipitation	58.2 mm (2.3 in)	43 of 100 (Notable)
Colgate	United States	Record daily precipitation	28.7 mm (1.1 in)	43 of 100 (Notable)
Edmore 4NW	United States	Record daily precipitation	31.0 mm (1.2 in)	43 of 100 (Notable)
Marion	United States	Record daily precipitation	46.2 mm (1.8 in)	43 of 100 (Notable)

Counts by Type and Timescale

1,236 records

Records set or tied on 15 October 1984 by type: Highest daily maximum 105, Lowest daily maximum 279, Highest daily minimum 108, Lowest daily minimum 106, Heaviest daily rainfall 495, Heaviest daily snowfall 92, Deepest snow cover 51.

Records on 15 October 1984 by type
Record type	Records
Highest daily maximum	105
Lowest daily maximum	279
Highest daily minimum	108
Lowest daily minimum	106
Heaviest daily rainfall	495
Heaviest daily snowfall	92
Deepest snow cover	51

Records on 15 October 1984 by timescale: all-time 0, monthly 32, daily 1,204.

How Much Records Were Beaten By

1,015 broken records

Margins by which the 1,015 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 280.0. Ties are not counted.

Top 20 by Significance

15 October 1984

Top 20 records on 15 October 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 October 1984	Mayville, US	daily rain	56.1 mm (2.2 in)	45.4 mm (1.8 in)	84 years	74 of 100 (Major)
15 October 1984	Clayton Muni Air Pk, US	monthly snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	57 years	71 of 100 (Major)
15 October 1984	Park River, US	daily rain	42.7 mm (1.7 in)	35.1 mm (1.4 in)	59 years	63 of 100 (Major)
15 October 1984	Little Falls 2NNE, US	daily rain	56.4 mm (2.2 in)	40.7 mm (1.6 in)	52 years	59 of 100 (Notable)
15 October 1984	Greenville, US	daily rain	78.2 mm (3.1 in)	44.7 mm (1.8 in)	70 years	57 of 100 (Notable)
15 October 1984	Walker, US	daily rain	55.4 mm (2.2 in)	49.8 mm (2.0 in)	36 years	57 of 100 (Notable)
15 October 1984	Fremont, US	daily rain	75.2 mm (3.0 in)	49.3 mm (1.9 in)	27 years	57 of 100 (Notable)
15 October 1984	Grafton, US	daily rain	52.3 mm (2.1 in)	45.9 mm (1.8 in)	27 years	57 of 100 (Notable)
15 October 1984	Brainerd, US	daily rain	57.2 mm (2.3 in)	54.7 mm (2.2 in)	32 years	56 of 100 (Notable)
15 October 1984	Atlantic 1 NE, US	daily rain	44.7 mm (1.8 in)	25.1 mm (1.0 in)	84 years	54 of 100 (Notable)
15 October 1984	Boone, US	daily rain	44.2 mm (1.7 in)	29.5 mm (1.2 in)	64 years	54 of 100 (Notable)
15 October 1984	Itasca UNIV of Minn, US	daily rain	40.1 mm (1.6 in)	27.4 mm (1.1 in)	56 years	53 of 100 (Notable)
15 October 1984	Arlington 1 W, US	daily rain	55.4 mm (2.2 in)	38.9 mm (1.5 in)	27 years	53 of 100 (Notable)
15 October 1984	Sac City, US	daily rain	58.4 mm (2.3 in)	29.7 mm (1.2 in)	54 years	52 of 100 (Notable)
15 October 1984	Gull Lake Dam, US	daily rain	44.5 mm (1.8 in)	40.4 mm (1.6 in)	27 years	52 of 100 (Notable)
15 October 1984	Ottertail, US	daily rain	59.4 mm (2.3 in)	50.5 mm (2.0 in)	27 years	52 of 100 (Notable)
15 October 1984	Wahoo, US	daily rain	67.3 mm (2.6 in)	49.5 mm (1.9 in)	27 years	52 of 100 (Notable)
15 October 1984	Brookings 2 NE, US	daily rain	49.5 mm (1.9 in)	33.0 mm (1.3 in)	21 years	52 of 100 (Notable)
15 October 1984	Hot Springs 1 NNE, US	daily rain	81.5 mm (3.2 in)	30.2 mm (1.2 in)	78 years	51 of 100 (Notable)
15 October 1984	Crookston NW Exp STN, US	daily rain	26.7 mm (1.1 in)	14.0 mm (0.6 in)	84 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

1794 to 1984

Records set or tied on this calendar date in each year from 1794 to 1984. 1984 had 1,236 records.

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

Records on 10-15 in each year
Year	Records
1794	1
1795	1
1796	1
1807	1
1808	2
1836	1
1838	1
1839	1
1849	1
1859	2
1862	1
1870	2
1871	4
1873	1
1875	1
1876	3
1877	1
1878	3
1879	3
1881	3
1882	4
1885	2
1886	1
1887	8
1889	2
1891	4
1892	1
1893	5
1894	9
1895	3
1896	8
1897	2
1898	3
1899	4
1900	3
1901	4
1902	7
1903	13
1904	10
1905	13
1906	7
1907	11
1908	13
1909	17
1910	14
1911	18
1912	17
1913	70
1914	28
1915	48
1916	21
1917	29
1918	21
1919	65
1920	38
1921	160
1922	43
1923	66
1924	118
1925	221
1926	125
1927	94
1928	385
1929	200
1930	282
1931	461
1932	213
1933	255
1934	434
1935	303
1936	126
1937	1,444
1938	598
1939	461
1940	458
1941	330
1942	494
1943	704
1944	246
1945	487
1946	354
1947	963
1948	224
1949	546
1950	321
1951	341
1952	662
1953	374
1954	945
1955	444
1956	555
1957	461
1958	606
1959	411
1960	600
1961	834
1962	1,009
1963	522
1964	488
1965	299
1966	1,265
1967	464
1968	1,111
1969	1,074
1970	642
1971	744
1972	584
1973	525
1974	768
1975	808
1976	791
1977	543
1978	886
1979	720
1980	1,006
1981	965
1982	297
1983	653
1984	1,236
1985	1,068
1986	768
1987	900
1988	896
1989	560
1990	1,134
1991	1,139
1992	1,530
1993	1,066
1994	1,103
1995	1,008
1996	458
1997	964
1998	806
1999	766
2000	625
2001	705
2002	965
2003	737
2004	716
2005	610
2006	1,305
2007	702
2008	959
2009	2,365
2010	1,095
2011	906
2012	909
2013	632
2014	901
2015	1,139
2016	674
2017	1,091
2018	2,682
2019	479
2020	499
2021	983
2022	633
2023	319
2024	748
2025	697

Download the Data

Data for records on 1984-10-15: 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	954
50 to 100	43
100 to 150	10
150 to 200	6
200 to 250	1
250 to 300	1