All Countries
Weather & Climate in Lyon Mountain, NY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Lyon Mountain has a cool climate with an average annual temperature of 45°F (7°C). Winters average 18°F in January while summers reach 69°F in July. The area gets 251 sunny days per year, above the national average. Annual precipitation totals 43.4 inches. Air quality is rated Good with a median AQI of 36. The city sits at an elevation of 2,676 feet.
Temperature
18°F Jan (-8°C)
69°F Jul (21°C)
| Annual Average | 44.8°F |
| 17% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 2,676 ft (816 m) |
| Area | 10.2 sq mi (26.3 km²) |
| Population Density | 23/sq mi |
| Coordinates | 44.7183°N, 73.8663°W |
| Timezone | America/New_York |
| County | Clinton County County |
| Nearest Airport | Plattsburgh International (PBG) 20 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 68.8 / 100 |
| Social Vulnerability | 39.0 / 100 |
| Community Resilience | 77.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
93 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.
| Apr 20, 2002 | 8 km NNW of Au Sable Forks, New York | M5.3 | 27 km | 5 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 148 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 97 km | 18 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 131 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 147 km | 10 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 129 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 140 km | 18 km |
| Feb 25, 2006 | 4 km NE of Thurso, Canada | M4.0 | 145 km | 11 km |
| Oct 10, 2012 | 7 km ESE of Verchères, Canada | M3.9 | 124 km | 9 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 64 km | 8 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 113 km | 10 km |
| Sep 18, 2011 | 1 km E of Thurso, Canada | M3.8 | 145 km | 5 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 57 km | 18 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 47 km | 18 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 59 km | 17 km |
| Apr 20, 2000 | 7 km WSW of Newcomb, New York | M3.8 | 91 km | 5 km |
| Nov 6, 2012 | Ontario-Quebec border region, Canada | M3.7 | 116 km | 11 km |
| Jan 9, 2006 | 2 km ESE of Franklin, Canada | M3.7 | 34 km | 13 km |
| Apr 20, 2002 | 5 km NNW of Au Sable Forks, New York | M3.7 | 29 km | 5 km |
| Sep 12, 1995 | 8 km S of Brownsburg-Chatham, Canada | M3.7 | 109 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
31 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 10 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 8, 1983 | EF2 | 60 km | 0.2 mi | 0 |
| Aug 3, 1970 | EF2 | 53 km | 4.5 mi | 0 |
| Jul 4, 1963 | EF2 | 56 km | 5.9 mi | 0 |
| May 20, 1962 | EF2 | 85 km | 1.8 mi | 0 |
| Jun 13, 1961 | EF2 | 65 km | 7.9 mi | 0 |
| Jun 24, 1960 | EF2 | 77 km | 2.0 mi | 0 |
| Jun 18, 1957 | EF2 | 85 km | 3.0 mi | 0 |
| Sep 19, 1954 | EF2 | 68 km | 0.1 mi | 0 |
| May 6, 1952 | EF2 | 45 km | 4.9 mi | 0 |
| Jul 18, 2022 | EF1 | 84 km | 0.9 mi | 0 |
| Mar 26, 2021 | EF1 | 96 km | 0.7 mi | 0 |
| Jul 18, 2008 | EF1 | 82 km | 0.3 mi | 0 |
| Jul 26, 1986 | EF1 | 35 km | 1.0 mi | 0 |
| May 31, 1985 | EF1 | 92 km | 5.0 mi | 0 |
| Jun 22, 1973 | EF1 | 64 km | 0.1 mi | 0 |
| Jun 11, 1973 | EF1 | 62 km | 0.1 mi | 0 |
| Jul 19, 1972 | EF1 | 81 km | 2.0 mi | 0 |
| Jun 9, 1965 | EF1 | 87 km | 1.0 mi | 0 |
| Jul 18, 1961 | EF1 | 61 km | 0.1 mi | 0 |
| Oct 16, 1958 | EF1 | 38 km | 0.3 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: FLAT ROCK FIRE (658 acres, 2018).
| Year | Name | Acres Burned | Distance |
| 2018 | FLAT ROCK FIRE | 658 | 25 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 2.9 in | |
| February | 15°F (-10°C) | 2.4 in | Coldest, Driest |
| March | 25°F (-4°C) | 2.9 in | |
| April | 38°F (3°C) | 3.2 in | |
| May | 51°F (11°C) | 3.6 in | |
| June | 60°F (15°C) | 4.2 in | |
| July | 69°F (21°C) | 4.3 in | Warmest |
| August | 63°F (17°C) | 4.9 in | Wettest |
| September | 55°F (13°C) | 4.4 in | |
| October | 44°F (6°C) | 3.7 in | |
| November | 32°F (0°C) | 3.9 in | |
| December | 19°F (-7°C) | 3.4 in |
Lyon Mountain has a seasonal temperature swing of 54°F / from 15°F in February to 69°F in July. Total annual precipitation is 43.8 inches, with August being the wettest month (4.9") and February the driest (2.4").