All Countries
Siasconset, MA
Full City Profile · Massachusetts · Nantucket County County
3.0
/5.0
B
Good
191
Population
90/sq mi density
$1,546,900
Home Value
$3,029,234 Zillow
51°F
Avg Temperature
275 sunny days/yr
146
Violent Crime/100K
1,951 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
146 violent crimes/100K
A+
Education
5.0 / 5.0
57.1% bachelor's degree or higher
Siasconset experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 33°F in January while summers reach 69°F in July. The area gets 275 sunny days per year. Annual precipitation totals 40.9 inches. Air quality is rated Good with a median AQI of 37.
Temperature
33°F Jan (1°C)
69°F Jul (21°C)
| Annual Average | 50.7°F |
| 6% below US avg | |
| January Average | 33°F (1°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 39 ft (12 m) |
| Area | 2.4 sq mi (6.3 km²) |
| Population Density | 90/sq mi |
| Coordinates | 41.2653°N, 69.9730°W |
| Timezone | America/New_York |
| County | Nantucket County County |
| Nearest Airport | New Bedford Regional (EWB) 58 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 38.7 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 99.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | No Rating |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (1°C) | 3.8 in | |
| February | 33°F (0°C) | 3.5 in | Coldest |
| March | 38°F (4°C) | 3.4 in | |
| April | 46°F (8°C) | 3.4 in | |
| May | 54°F (12°C) | 3.5 in | |
| June | 62°F (17°C) | 2.7 in | |
| July | 69°F (21°C) | 2.6 in | Warmest, Driest |
| August | 69°F (20°C) | 3.0 in | |
| September | 63°F (17°C) | 3.5 in | |
| October | 54°F (12°C) | 3.5 in | |
| November | 46°F (8°C) | 3.9 in | |
| December | 37°F (3°C) | 4.5 in | Wettest |
Siasconset has a seasonal temperature swing of 36°F / from 33°F in February to 69°F in July. Total annual precipitation is 41.3 inches, with December being the wettest month (4.5") and July the driest (2.6").