Weather Records on 17 October 1977

1,060 weather records were set or tied worldwide on 17 October 1977. Highest significance: Le Roy, US.

Key Facts for 17 October 1977

On 17 October 1977, 1,060 weather records were set or tied at long-record stations worldwide.
71 were record highs and 628 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 33 monthly and 1,027 daily.
Le Roy set a daily record precipitation of 56.6 mm (2.2 in) on 17 October 1977.
Across 162 earlier years (1793 to 2025) the same calendar date averaged 436 records.

Record Map

1,060 stations

1,060 station records on 17 October 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 October 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Le Roy	United States	Record daily precipitation	56.6 mm (2.2 in)	66 of 100 (Major)
Pahoa 65	United States	Record daily precipitation	182.4 mm (7.2 in)	60 of 100 (Major)
Lake Placid 2 S	United States	Record daily precipitation	58.2 mm (2.3 in)	59 of 100 (Notable)
Luroy	Norway	Record daily precipitation	157.1 mm (6.2 in)	58 of 100 (Notable)
Kenai AP	United States	Record daily snowfall	13.5 cm (5.3 in)	55 of 100 (Notable)
Peru 2 WSW	United States	Record daily precipitation	64.0 mm (2.5 in)	53 of 100 (Notable)
Promissao	Brazil	Record daily precipitation	75.9 mm (3.0 in)	51 of 100 (Notable)
Kvareli	Georgia	Record daily precipitation	86.4 mm (3.4 in)	51 of 100 (Notable)
Ithaca Cornell UNIV	United States	Record daily precipitation	65.0 mm (2.6 in)	51 of 100 (Notable)
Plattsburgh AFB	United States	Record daily precipitation	57.2 mm (2.3 in)	51 of 100 (Notable)
Locke 2 W	United States	Record daily precipitation	60.2 mm (2.4 in)	50 of 100 (Notable)
Morokweng (Pol)	South Africa	Record daily precipitation	52.0 mm (2.0 in)	49 of 100 (Notable)
Slangfontein	South Africa	Record daily precipitation	40.0 mm (1.6 in)	48 of 100 (Notable)
Berlin	United States	Record daily precipitation	40.9 mm (1.6 in)	48 of 100 (Notable)
Durham	United States	Record daily precipitation	82.8 mm (3.3 in)	48 of 100 (Notable)
Arcade	United States	Record daily snowfall	7.6 cm (3.0 in)	48 of 100 (Notable)
West Rumney	United States	Record daily precipitation	60.2 mm (2.4 in)	47 of 100 (Notable)
Chemung	United States	Record daily precipitation	51.3 mm (2.0 in)	47 of 100 (Notable)
Sherburne	United States	Record daily precipitation	48.0 mm (1.9 in)	47 of 100 (Notable)
Banner Elk	United States	Record daily snowfall	10.2 cm (4.0 in)	47 of 100 (Notable)
Little Falls Mill St	United States	Record daily precipitation	59.7 mm (2.4 in)	46 of 100 (Notable)
Roxboro 7 ESE	United States	Record low maximum temperature	10.6 C (51.1 F)	45 of 100 (Notable)
Freeland	United States	Record daily snowfall	22.9 cm (9.0 in)	45 of 100 (Notable)
Windham 3 E	United States	Record daily precipitation	72.6 mm (2.9 in)	44 of 100 (Notable)
Scotland Neck	United States	Record low maximum temperature	11.1 C (52.0 F)	44 of 100 (Notable)
Susquehanna	United States	Record daily precipitation	58.4 mm (2.3 in)	44 of 100 (Notable)
Tbilisi	Georgia	Record daily precipitation	29.3 mm (1.2 in)	43 of 100 (Notable)
Steigen	Norway	Record daily precipitation	53.5 mm (2.1 in)	43 of 100 (Notable)
Ankenes	Norway	Record daily precipitation	32.8 mm (1.3 in)	43 of 100 (Notable)
Candor 2SE	United States	Record daily precipitation	66.0 mm (2.6 in)	43 of 100 (Notable)
Kenton	United States	Record low minimum temperature	-7.8 C (18.0 F)	43 of 100 (Notable)
Dmanisi	Georgia	Record daily precipitation	31.6 mm (1.2 in)	42 of 100 (Notable)
Bolnisi	Georgia	Record daily precipitation	25.1 mm (1.0 in)	42 of 100 (Notable)
Bolivar	United States	Record daily snowfall	5.3 cm (2.1 in)	42 of 100 (Notable)
Hollisterville	United States	Record daily precipitation	55.9 mm (2.2 in)	42 of 100 (Notable)
Borzomi	Georgia	Record daily precipitation	30.0 mm (1.2 in)	41 of 100 (Notable)
Chazy	United States	Record daily precipitation	46.2 mm (1.8 in)	41 of 100 (Notable)
Cooperstown	United States	Record daily precipitation	57.4 mm (2.3 in)	41 of 100 (Notable)
Freeland	United States	Record snow depth	22.9 cm (9.0 in)	41 of 100 (Notable)
Burkes Garden	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Auburn	United States	Record daily precipitation	53.3 mm (2.1 in)	40 of 100 (Notable)
Jefferson 2 E	United States	Record daily snowfall	5.1 cm (2.0 in)	40 of 100 (Notable)
Findlay Wpcc	United States	Record low minimum temperature	-6.1 C (21.0 F)	40 of 100 (Notable)
Pickens 1	United States	Record daily snowfall	20.3 cm (8.0 in)	40 of 100 (Notable)
Anhembi	Brazil	Record daily precipitation	61.5 mm (2.4 in)	39 of 100 (Notable)
Adrian 2 NNE	United States	Record low minimum temperature	-6.1 C (21.0 F)	39 of 100 (Notable)
Bowling Green Wwtp	United States	Record low minimum temperature	-6.1 C (21.0 F)	39 of 100 (Notable)
Montrose	United States	Record daily precipitation	43.2 mm (1.7 in)	39 of 100 (Notable)
Asmara	Eritrea	Record daily precipitation	29.9 mm (1.2 in)	38 of 100 (Notable)
Tara	Russia	Record daily precipitation	31.0 mm (1.2 in)	38 of 100 (Notable)
Grafton	United States	Record daily precipitation	45.7 mm (1.8 in)	38 of 100 (Notable)
Elizabethtown	United States	Record daily precipitation	35.8 mm (1.4 in)	38 of 100 (Notable)
Atalaia	Brazil	Record daily precipitation	40.0 mm (1.6 in)	37 of 100 (Notable)
Dolgeville	United States	Record daily precipitation	49.0 mm (1.9 in)	37 of 100 (Notable)
Chapel Hill 2 W	United States	Record low maximum temperature	12.2 C (54.0 F)	37 of 100 (Notable)
Montpelier	United States	Record low minimum temperature	-5.6 C (21.9 F)	37 of 100 (Notable)
Chittenden	United States	Record daily precipitation	32.3 mm (1.3 in)	37 of 100 (Notable)
Andira Anell/Cesp	Brazil	Record daily precipitation	63.6 mm (2.5 in)	36 of 100 (Notable)
Sumidouro-Usina Sao Jorge	Brazil	Record daily precipitation	65.0 mm (2.6 in)	36 of 100 (Notable)
Bones I Bardu	Norway	Record daily precipitation	30.9 mm (1.2 in)	36 of 100 (Notable)

Counts by Type and Timescale

1,060 records

Records set or tied on 17 October 1977 by type: Highest daily maximum 39, Lowest daily maximum 238, Highest daily minimum 32, Lowest daily minimum 390, Heaviest daily rainfall 309, Heaviest daily snowfall 40, Deepest snow cover 12.

Records on 17 October 1977 by type
Record type	Records
Highest daily maximum	39
Lowest daily maximum	238
Highest daily minimum	32
Lowest daily minimum	390
Heaviest daily rainfall	309
Heaviest daily snowfall	40
Deepest snow cover	12

Records on 17 October 1977 by timescale: all-time 0, monthly 33, daily 1,027.

How Much Records Were Beaten By

885 broken records

Margins by which the 885 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 148.1. Ties are not counted.

Top 20 by Significance

17 October 1977

Top 20 records on 17 October 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 October 1977	Le Roy, US	daily rain	56.6 mm (2.2 in)	38.8 mm (1.5 in)	74 years	66 of 100 (Major)
17 October 1977	Pahoa 65, US	daily rain	182.4 mm (7.2 in)	148.1 mm (5.8 in)	46 years	60 of 100 (Major)
17 October 1977	Lake Placid 2 S, US	daily rain	58.2 mm (2.3 in)	32.5 mm (1.3 in)	40 years	59 of 100 (Notable)
17 October 1977	Luroy, NO	daily rain	157.1 mm (6.2 in)	111.9 mm (4.4 in)	44 years	58 of 100 (Notable)
17 October 1977	Kenai AP, US	daily snowfall	13.5 cm (5.3 in)	11.0 cm (4.3 in)	74 years	55 of 100 (Notable)
17 October 1977	Peru 2 WSW, US	monthly rain	64.0 mm (2.5 in)	27.2 mm (1.1 in)	18 years	53 of 100 (Notable)
17 October 1977	Promissao, BR	daily rain	75.9 mm (3.0 in)	65.6 mm (2.6 in)	27 years	51 of 100 (Notable)
17 October 1977	Kvareli, GE	daily rain	86.4 mm (3.4 in)	61.8 mm (2.4 in)	26 years	51 of 100 (Notable)
17 October 1977	Ithaca Cornell UNIV, US	daily rain	65.0 mm (2.6 in)	29.7 mm (1.2 in)	40 years	51 of 100 (Notable)
17 October 1977	Plattsburgh AFB, US	monthly rain	57.2 mm (2.3 in)	8.9 mm (0.35 in)	72 years	51 of 100 (Notable)
17 October 1977	Locke 2 W, US	daily rain	60.2 mm (2.4 in)	35.3 mm (1.4 in)	40 years	50 of 100 (Notable)
17 October 1977	Morokweng (Pol), ZA	monthly rain	52.0 mm (2.0 in)	13.9 mm (0.5 in)	37 years	49 of 100 (Notable)
17 October 1977	Slangfontein, ZA	daily rain	40.0 mm (1.6 in)	35.4 mm (1.4 in)	50 years	48 of 100 (Notable)
17 October 1977	Berlin, US	daily rain	40.9 mm (1.6 in)	22.4 mm (0.9 in)	59 years	48 of 100 (Notable)
17 October 1977	Durham, US	daily rain	82.8 mm (3.3 in)	50.0 mm (2.0 in)	22 years	48 of 100 (Notable)
17 October 1977	Arcade, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	83 years	48 of 100 (Notable)
17 October 1977	West Rumney, US	daily rain	60.2 mm (2.4 in)	45.2 mm (1.8 in)	22 years	47 of 100 (Notable)
17 October 1977	Chemung, US	daily rain	51.3 mm (2.0 in)	25.9 mm (1.0 in)	34 years	47 of 100 (Notable)
17 October 1977	Sherburne, US	daily rain	48.0 mm (1.9 in)	23.9 mm (0.9 in)	58 years	47 of 100 (Notable)
17 October 1977	Banner Elk, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	68 years	47 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

1793 to 1977

Records set or tied on this calendar date in each year from 1793 to 1977. 1977 had 1,060 records.

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

Records on 10-17 in each year
Year	Records
1793	1
1796	2
1808	2
1810	1
1811	1
1817	1
1820	1
1830	1
1836	1
1844	1
1845	1
1868	1
1869	2
1870	1
1872	1
1874	1
1875	1
1876	3
1877	1
1878	1
1879	7
1881	1
1882	1
1883	1
1884	2
1885	2
1886	1
1889	1
1890	3
1891	2
1892	6
1893	5
1894	2
1895	1
1897	3
1898	6
1899	3
1900	3
1901	3
1902	4
1903	9
1904	17
1905	12
1906	3
1907	16
1908	46
1909	18
1910	13
1911	24
1912	12
1913	26
1914	72
1915	7
1916	81
1917	29
1918	20
1919	34
1920	82
1921	64
1922	60
1923	149
1924	81
1925	324
1926	153
1927	163
1928	530
1929	119
1930	441
1931	431
1932	345
1933	190
1934	262
1935	337
1936	338
1937	865
1938	710
1939	424
1940	580
1941	194
1942	349
1943	1,173
1944	415
1945	289
1946	437
1947	744
1948	724
1949	442
1950	809
1951	274
1952	474
1953	463
1954	579
1955	562
1956	353
1957	245
1958	415
1959	403
1960	432
1961	525
1962	350
1963	513
1964	492
1965	920
1966	551
1967	576
1968	929
1969	714
1970	815
1971	1,053
1972	866
1973	542
1974	1,055
1975	605
1976	1,381
1977	1,060
1978	583
1979	468
1980	1,366
1981	555
1982	575
1983	526
1984	1,551
1985	585
1986	354
1987	828
1988	827
1989	1,163
1990	1,109
1991	1,352
1992	1,384
1993	1,001
1994	1,306
1995	1,076
1996	987
1997	1,114
1998	1,455
1999	815
2000	461
2001	878
2002	992
2003	764
2004	935
2005	643
2006	1,506
2007	690
2008	467
2009	1,606
2010	625
2011	734
2012	550
2013	516
2014	530
2015	843
2016	1,559
2017	743
2018	1,163
2019	504
2020	889
2021	294
2022	964
2023	544
2024	994
2025	363

Download the Data

Data for records on 1977-10-17: 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 20	795
20 to 40	68
40 to 60	10
60 to 80	5
80 to 100	1
100 to 120	5
120 to 140	0
140 to 160	1