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Weather & Climate in Mountain Dale, NY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mountain Dale experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 23°F in January while summers reach 69°F in July. The area gets 271 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 51.9 inches (wetter than the 38-inch national average). The area receives 57.9 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 36. The city sits at an elevation of 1,098 feet.
Temperature
23°F Jan (-5°C)
69°F Jul (20°C)
| Annual Average | 46.0°F |
| 15% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 69°F (20°C) |
| Sunny Days | 271 days/yr |
Geography
| Elevation | 1,098 ft (335 m) |
| Area | 5.8 sq mi (15.0 km²) |
| Population Density | 50/sq mi |
| Coordinates | 41.6913°N, 74.5206°W |
| Timezone | America/New_York |
| County | Sullivan County County |
| Nearest Airport | Sullivan County International (MSV) 14 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 78.3 / 100 |
| Social Vulnerability | 48.0 / 100 |
| Community Resilience | 56.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
32 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Apr 5, 2024 | 2024 Tewksbury, New Jersey Earthquake | M4.8 | 112 km | 3 km |
| Jun 17, 1991 | 7 km NE of Worcester, New York | M4.0 | 105 km | 5 km |
| Apr 5, 2024 | 7 km WSW of Gladstone, New Jersey | M3.7 | 113 km | 4 km |
| Jun 16, 2000 | 5 km NE of Granville, Massachusetts | M3.3 | 148 km | 10 km |
| Dec 13, 2009 | 15 km N of Medusa, New York | M3.2 | 104 km | 10 km |
| Aug 26, 2003 | 4 km NNW of Milford, New Jersey | M3.1 | 130 km | 3 km |
| Jan 9, 1992 | 4 km WNW of Robertsville, New Jersey | M3.1 | 149 km | 8 km |
| May 18, 2009 | 15 km N of Medusa, New York | M3.1 | 104 km | 9 km |
| Jul 24, 2007 | 12 km SSW of Altamont, New York | M3.1 | 107 km | 15 km |
| Aug 3, 2025 | 0 km W of Little Ferry, New Jersey | M3.0 | 101 km | 10 km |
| Oct 28, 1991 | 3 km WNW of Stamford, Connecticut | M3.0 | 105 km | 10 km |
| Feb 3, 2009 | 1 km ESE of Victory Gardens, New Jersey | M3.0 | 91 km | 0 km |
| Oct 21, 2009 | 15 km N of Medusa, New York | M2.9 | 104 km | 7 km |
| Apr 27, 2024 | 7 km WSW of Gladstone, New Jersey | M2.9 | 113 km | 5 km |
| May 24, 2024 | 6 km E of Califon, New Jersey | M2.9 | 111 km | 7 km |
| Aug 5, 2025 | 1 km N of Hillsdale, New Jersey | M2.8 | 85 km | 12 km |
| Aug 27, 2011 | 5 km WSW of Altamont, New York | M2.8 | 116 km | 22 km |
| Mar 22, 2009 | 9 km SW of Altamont, New York | M2.8 | 110 km | 16 km |
| Apr 12, 1991 | 2 km ENE of North Castle, New York | M2.7 | 94 km | 9 km |
| Aug 25, 2011 | 5 km WSW of Altamont, New York | M2.7 | 116 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 1991 | Bob | Category 2 | 104 mph | 249 km |
| 1985 | Gloria | Category 1 | 86 mph | 145 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
172 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 11 fatalities, 100 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 1998 | EF3 | 65 km | 20.0 mi | 0 |
| Jul 14, 1988 | EF3 | 40 km | 7.2 mi | 0 |
| Mar 21, 1976 | EF3 | 96 km | 0.5 mi | 0 |
| Jun 16, 1974 | EF3 | 84 km | 49.1 mi | 0 |
| May 28, 1973 | EF3 | 99 km | 0.4 mi | 0 |
| May 28, 1973 | EF3 | 95 km | 0.4 mi | 0 |
| Apr 22, 2023 | EF2 | 36 km | 10.0 mi | 0 |
| May 15, 2018 | EF2 | 73 km | 1.2 mi | 0 |
| Jul 23, 2010 | EF2 | 71 km | 25.7 mi | 0 |
| Jul 29, 2009 | EF2 | 52 km | 7.4 mi | 0 |
| Jul 12, 2006 | EF2 | 88 km | 10.1 mi | 0 |
| Jul 21, 2003 | EF2 | 73 km | 1.5 mi | 0 |
| May 18, 2000 | EF2 | 48 km | 0.2 mi | 0 |
| May 31, 1998 | EF2 | 65 km | 3.0 mi | 0 |
| May 31, 1998 | EF2 | 69 km | 2.0 mi | 0 |
| May 29, 1995 | EF2 | 83 km | 15.0 mi | 0 |
| Sep 18, 1991 | EF2 | 84 km | 4.0 mi | 0 |
| Jul 10, 1989 | EF2 | 76 km | 0.5 mi | 0 |
| Jul 10, 1989 | EF2 | 100 km | 10.0 mi | 0 |
| Oct 1, 1986 | EF2 | 66 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 118 km |
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
13 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (23,000 acres, 1985).
| Year | Name | Acres Burned | Distance |
| 1985 | UNNAMED | 23,000 | 65 km |
| 2016 | 16 MILE | 7,896 | 76 km |
| 2024 | JENNINGS CREEK | 5,069 | 60 km |
| 2015 | ROOSA GAP | 2,747 | 10 km |
| 2008 | UNNAMED | 2,224 | 21 km |
| 2016 | SAMS POINT FIRE-VERKEERDER FIRE | 1,929 | 15 km |
| 2006 | CHERRYTOWN FIRE | 943 | 22 km |
| 1988 | UNNAMED | 833 | 60 km |
| 2020 | SEVEN PINES | 790 | 89 km |
| 2016 | BEAR TOWN | 649 | 82 km |
| 2016 | SHERWOOD | 642 | 67 km |
| 2024 | WHITEHOUSE | 607 | 25 km |
| 1999 | WORTHINGTO | 514 | 92 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 3.3 in | Coldest |
| February | 24°F (-4°C) | 3.0 in | Driest |
| March | 33°F (1°C) | 3.6 in | |
| April | 44°F (7°C) | 4.1 in | |
| May | 56°F (13°C) | 4.7 in | Wettest |
| June | 64°F (18°C) | 4.4 in | |
| July | 69°F (20°C) | 4.3 in | Warmest |
| August | 67°F (20°C) | 4.2 in | |
| September | 60°F (15°C) | 4.0 in | |
| October | 49°F (9°C) | 3.7 in | |
| November | 39°F (4°C) | 4.2 in | |
| December | 28°F (-2°C) | 3.7 in |
Mountain Dale has a seasonal temperature swing of 46°F / from 23°F in January to 69°F in July. Total annual precipitation is 47.2 inches, with May being the wettest month (4.7") and February the driest (3.0").