Somerville, MA
Full City Profile · Massachusetts · Suffolk County County
3.4
/5.0
B
Good
80,549
Population
19,551/sq mi density
$127,056
Median Income
$70,880 per capita
$899,400
Home Value
$923,850 Zillow
$2,468
Median Rent
25.2% income on rent
52°F
Avg Temperature
221
Violent Crime/100K
1,701 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$127,056 median income, 2.9% unemployment
C+
Affordability
2.7 / 5.0
$899,400 home value, $2,468/mo rent
F
Safety
1.0 / 5.0
221 violent crimes/100K
A+
Education
5.0 / 5.0
68.0% bachelor's degree or higher
Somerville experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 74°F in July. Annual precipitation totals 43.6 inches. The area receives 49.2 inches of snow annually. Air quality is rated Good with a median AQI of 36.
Temperature
30°F Jan (-1°C)
74°F Jul (23°C)
| Annual Average | 51.9°F |
| 4% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 75 ft (23 m) |
| Area | 4.1 sq mi (10.7 km²) |
| Population Density | 19,551/sq mi |
| Coordinates | 42.3904°N, 71.1010°W |
| Timezone | America/New_York |
| County | Suffolk County County |
| Nearest Airport | General Edward Lawrence Logan International (BOS) 5 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
| Good Days % | 79.5% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0356 ppm |
| NO₂ (Nitrogen Dioxide) | 15.7 ppb |
| SO₂ (Sulfur Dioxide) | 0.25 ppb |
| CO (Carbon Monoxide) | 0.29 ppm |
| PM2.5 (Fine Particles) | 7.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 93.5 / 100 |
| Social Vulnerability | 70.6 / 100 |
| Community Resilience | 95.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Relatively Low |
| Lightning | Very High |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.4 in | Coldest |
| February | 32°F (-0°C) | 3.2 in | Driest |
| March | 38°F (4°C) | 4.2 in | |
| April | 49°F (9°C) | 3.6 in | |
| May | 58°F (15°C) | 3.3 in | |
| June | 68°F (20°C) | 3.9 in | |
| July | 74°F (23°C) | 3.3 in | Warmest |
| August | 73°F (23°C) | 3.2 in | |
| September | 66°F (19°C) | 3.6 in | |
| October | 55°F (13°C) | 4.0 in | |
| November | 45°F (7°C) | 3.7 in | |
| December | 36°F (2°C) | 4.3 in | Wettest |
Somerville has a seasonal temperature swing of 44°F / from 30°F in January to 74°F in July. Total annual precipitation is 43.6 inches, with December being the wettest month (4.3") and February the driest (3.2").