Dennis Port, MA
Full City Profile · Massachusetts · Barnstable County County
3.2
/5.0
B
Good
3,439
Population
1,131/sq mi density
$61,974
Median Income
$44,522 per capita
$450,500
Home Value
$1,036,007 Zillow
$1,524
Median Rent
30.5% income on rent
50°F
Avg Temperature
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.1 / 5.0
$61,974 median income, 7.2% unemployment
C+
Affordability
2.6 / 5.0
$450,500 home value, $1,524/mo rent
A
Education
4.0 / 5.0
38.0% bachelor's degree or higher
Dennis Port experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 31°F in January while summers reach 71°F in July. Annual precipitation totals 46.3 inches. The area receives 21.5 inches of snow annually. Air quality is rated Good with a median AQI of 36.
Temperature
31°F Jan (-0°C)
71°F Jul (22°C)
| Annual Average | 50.4°F |
| 7% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 2 ft (1 m) |
| Area | 3.0 sq mi (7.9 km²) |
| Population Density | 1,131/sq mi |
| Coordinates | 41.6681°N, 70.1370°W |
| Timezone | America/New_York |
| County | Barnstable County County |
| Nearest Airport | New Bedford Regional (EWB) 42 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
| Good Days % | 94.3% |
| Unhealthy Days | 1 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0435 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 89.1 / 100 |
| Social Vulnerability | 34.5 / 100 |
| Community Resilience | 99.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| 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) | 3.8 in | |
| February | 31°F (-1°C) | 3.7 in | Coldest |
| March | 37°F (3°C) | 4.3 in | |
| April | 45°F (7°C) | 4.1 in | |
| May | 55°F (13°C) | 3.5 in | |
| June | 64°F (18°C) | 3.3 in | |
| July | 71°F (22°C) | 2.8 in | Warmest, Driest |
| August | 71°F (21°C) | 3.4 in | |
| September | 64°F (18°C) | 3.9 in | |
| October | 54°F (12°C) | 4.7 in | |
| November | 45°F (7°C) | 4.0 in | |
| December | 37°F (3°C) | 4.8 in | Wettest |
Dennis Port has a seasonal temperature swing of 40°F / from 31°F in February to 71°F in July. Total annual precipitation is 46.3 inches, with December being the wettest month (4.8") and July the driest (2.8").