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Weather & Climate in Nassau, NY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Nassau experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 26°F in January while summers reach 75°F in July. The area gets 246 sunny days per year, above the national average. Annual precipitation totals 42.1 inches. Air quality is rated Good with a median AQI of 31. 84% of days have good air quality. The city sits at an elevation of 387 feet.
Temperature
26°F Jan (-4°C)
75°F Jul (24°C)
| Annual Average | 50.9°F |
| 6% below US avg | |
| January Average | 26°F (-4°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 387 ft (118 m) |
| Area | 0.7 sq mi (1.8 km²) |
| Population Density | 1,626/sq mi |
| Coordinates | 42.5140°N, 73.6108°W |
| Timezone | America/New_York |
| County | Rensselaer County County |
| Nearest Airport | Albany International (ALB) 19 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 31.0 |
| Rating | Good |
| Good Days % | 84.2% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 82.2 / 100 |
| Social Vulnerability | 34.9 / 100 |
| Community Resilience | 87.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Coastal Flood | No Rating |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
21 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Jun 17, 1991 | 7 km NE of Worcester, New York | M4.0 | 88 km | 5 km |
| Oct 2, 1994 | 6 km W of Hardwick, Massachusetts | M3.7 | 111 km | 10 km |
| Oct 2, 1994 | 1 km NW of Hardwick, Massachusetts | M3.3 | 116 km | 10 km |
| Jun 16, 2000 | 5 km NE of Granville, Massachusetts | M3.3 | 80 km | 10 km |
| Dec 13, 2009 | 15 km N of Medusa, New York | M3.2 | 41 km | 10 km |
| Mar 11, 2020 | 0 km SSW of South Glens Falls, New York | M3.1 | 87 km | 13 km |
| Jul 24, 2007 | 12 km SSW of Altamont, New York | M3.1 | 43 km | 15 km |
| May 18, 2009 | 15 km N of Medusa, New York | M3.1 | 42 km | 9 km |
| Oct 21, 2009 | 15 km N of Medusa, New York | M2.9 | 41 km | 7 km |
| Sep 29, 1994 | 13 km WNW of North Creek, New York | M2.9 | 143 km | 16 km |
| May 14, 2007 | 5 km ESE of Benson, Vermont | M2.8 | 135 km | 8 km |
| Mar 22, 2009 | 9 km SW of Altamont, New York | M2.8 | 43 km | 16 km |
| Aug 27, 2011 | 5 km WSW of Altamont, New York | M2.8 | 44 km | 22 km |
| Aug 25, 2011 | 5 km WSW of Altamont, New York | M2.7 | 44 km | 18 km |
| Feb 18, 2009 | 15 km N of Medusa, New York | M2.7 | 41 km | 9 km |
| Feb 20, 2009 | 15 km SSW of Altamont, New York | M2.7 | 40 km | 8 km |
| Feb 27, 2008 | 2 km SW of Central Bridge, New York | M2.7 | 65 km | 6 km |
| Aug 22, 2000 | 2 km WSW of Brewster Hill, New York | M2.6 | 122 km | 7 km |
| Jul 24, 2007 | 13 km SSW of Altamont, New York | M2.6 | 43 km | 14 km |
| Dec 13, 2009 | 14 km N of Medusa, New York | M2.6 | 41 km | 10 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 | 221 km |
| 1985 | Gloria | Category 1 | 86 mph | 96 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
190 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 10 fatalities, 407 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 29, 1995 | EF4 | 38 km | 11.5 mi | 3 |
| Jul 10, 1989 | EF4 | 83 km | 42.0 mi | 0 |
| Aug 28, 1973 | EF4 | 19 km | 9.8 mi | 4 |
| May 22, 2014 | EF3 | 58 km | 6.8 mi | 0 |
| Jun 1, 2011 | EF3 | 84 km | 37.6 mi | 3 |
| May 31, 1998 | EF3 | 47 km | 30.5 mi | 0 |
| Jun 16, 1974 | EF3 | 34 km | 49.1 mi | 0 |
| Sep 13, 1971 | EF3 | 80 km | 0.5 mi | 0 |
| Aug 20, 1968 | EF3 | 93 km | 1.0 mi | 0 |
| Jun 24, 1960 | EF3 | 39 km | 16.0 mi | 0 |
| May 29, 2013 | EF2 | 61 km | 12.8 mi | 0 |
| Jul 11, 2006 | EF2 | 99 km | 2.9 mi | 0 |
| Jul 21, 2003 | EF2 | 46 km | 1.5 mi | 0 |
| Jul 21, 2003 | EF2 | 15 km | 1.3 mi | 0 |
| Jun 23, 2001 | EF2 | 89 km | 0.5 mi | 0 |
| May 18, 2000 | EF2 | 83 km | 0.2 mi | 0 |
| May 31, 1998 | EF2 | 8 km | 8.0 mi | 0 |
| Jul 3, 1997 | EF2 | 20 km | 1.5 mi | 0 |
| Jul 3, 1997 | EF2 | 50 km | 4.5 mi | 0 |
| Jul 3, 1997 | EF2 | 52 km | 3.7 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
3 wildfires (100+ acres) recorded within 100 km. Largest: EAST MOUNTAIN (964 acres, 2021).
| Year | Name | Acres Burned | Distance |
| 2021 | EAST MOUNTAIN | 964 | 44 km |
| 2006 | CHERRYTOWN FIRE | 943 | 96 km |
| 2024 | WHITEHOUSE | 607 | 97 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-4°C) | 2.7 in | |
| February | 23°F (-5°C) | 2.4 in | Coldest, Driest |
| March | 33°F (1°C) | 3.0 in | |
| April | 45°F (7°C) | 3.3 in | |
| May | 57°F (14°C) | 3.8 in | |
| June | 65°F (18°C) | 3.9 in | Wettest |
| July | 75°F (24°C) | 3.8 in | Warmest |
| August | 68°F (20°C) | 3.8 in | |
| September | 60°F (15°C) | 3.4 in | |
| October | 49°F (9°C) | 3.2 in | |
| November | 39°F (4°C) | 3.4 in | |
| December | 27°F (-3°C) | 3.0 in |
Nassau has a seasonal temperature swing of 52°F / from 23°F in February to 75°F in July. Total annual precipitation is 39.6 inches, with June being the wettest month (3.9") and February the driest (2.4").