South Duxbury, MA
Full City Profile · Massachusetts · Essex County County
4.5
/5.0
A+
Excellent
3,272
Population
1,113/sq mi density
$206,111
Median Income
$102,019 per capita
$987,500
Home Value
$1,072,384 Zillow
$2,181
Median Rent
28.2% income on rent
53°F
Avg Temperature
A+
Overall
4.5 / 5.0
Strong
A+
Economy
4.6 / 5.0
$206,111 median income, 4.6% unemployment
B+
Affordability
4.0 / 5.0
$987,500 home value, $2,181/mo rent
A+
Education
5.0 / 5.0
80.6% bachelor's degree or higher
South Duxbury experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 31°F in January while summers reach 74°F in July. Annual precipitation totals 52.8 inches. The area receives 37.9 inches of snow annually. Air quality is rated Good with a median AQI of 37.
Temperature
31°F Jan (-0°C)
74°F Jul (23°C)
| Annual Average | 52.5°F |
| 3% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 5 ft (2 m) |
| Area | 2.9 sq mi (7.6 km²) |
| Population Density | 1,113/sq mi |
| Coordinates | 42.0181°N, 70.6897°W |
| Timezone | America/New_York |
| County | Essex County County |
| Nearest Airport | New Bedford Regional (EWB) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
| Good Days % | 82.0% |
| Unhealthy Days | 4 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0421 ppm |
| NO₂ (Nitrogen Dioxide) | 8.1 ppb |
| PM2.5 (Fine Particles) | 7.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.6 / 100 |
| Social Vulnerability | 34.2 / 100 |
| Community Resilience | 95.6 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
| Coastal Flood | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 4.8 in | Coldest |
| February | 33°F (1°C) | 4.2 in | |
| March | 39°F (4°C) | 5.8 in | Wettest |
| April | 49°F (9°C) | 4.7 in | |
| May | 59°F (15°C) | 3.7 in | |
| June | 68°F (20°C) | 3.8 in | |
| July | 74°F (23°C) | 3.5 in | Warmest, Driest |
| August | 73°F (23°C) | 3.6 in | |
| September | 66°F (19°C) | 4.3 in | |
| October | 56°F (13°C) | 5.0 in | |
| November | 46°F (8°C) | 4.4 in | |
| December | 37°F (3°C) | 4.9 in |
South Duxbury has a seasonal temperature swing of 43°F / from 31°F in January to 74°F in July. Total annual precipitation is 52.8 inches, with March being the wettest month (5.8") and July the driest (3.5").