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Belmont, MA
Full City Profile · Massachusetts · Suffolk County County
3.5
/5.0
B+
Good
27,009
Population
5,808/sq mi density
$178,188
Median Income
$92,602 per capita
$1,108,800
Home Value
$1,409,985 Zillow
$2,387
Median Rent
25.4% income on rent
51°F
Avg Temperature
246 sunny days/yr
23
Violent Crime/100K
680 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$178,188 median income, 3.1% unemployment
B
Affordability
3.2 / 5.0
$1,108,800 home value, $2,387/mo rent
F
Safety
1.0 / 5.0
23 violent crimes/100K
A+
Education
5.0 / 5.0
80.2% bachelor's degree or higher
Belmont experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 28°F in January while summers reach 74°F in July. The area gets 246 sunny days per year. Annual precipitation totals 49.4 inches. Air quality is rated Good with a median AQI of 37.
Temperature
28°F Jan (-2°C)
74°F Jul (24°C)
| Annual Average | 51.2°F |
| 5% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 118 ft (36 m) |
| Area | 4.7 sq mi (12.2 km²) |
| Population Density | 5,808/sq mi |
| Coordinates | 42.3953°N, 71.1803°W |
| Timezone | America/New_York |
| County | Suffolk County County |
| Nearest Airport | General Edward Lawrence Logan International (BOS) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
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 | 28°F (-2°C) | 4.1 in | |
| February | 27°F (-3°C) | 3.4 in | Coldest, Driest |
| March | 36°F (2°C) | 4.1 in | |
| April | 46°F (8°C) | 3.9 in | |
| May | 57°F (14°C) | 3.6 in | |
| June | 66°F (19°C) | 3.5 in | |
| July | 74°F (24°C) | 3.5 in | Warmest |
| August | 71°F (21°C) | 3.7 in | |
| September | 63°F (17°C) | 3.7 in | |
| October | 51°F (11°C) | 4.0 in | |
| November | 42°F (6°C) | 4.3 in | Wettest |
| December | 31°F (-0°C) | 4.1 in |
Belmont has a seasonal temperature swing of 47°F / from 27°F in February to 74°F in July. Total annual precipitation is 45.9 inches, with November being the wettest month (4.3") and February the driest (3.4").