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Waltham, MA
Full City Profile · Massachusetts · Middlesex County County
3.5
/5.0
B+
Good
64,723
Population
5,076/sq mi density
$116,560
Median Income
$58,065 per capita
$705,700
Home Value
$802,136 Zillow
$2,232
Median Rent
27.4% income on rent
51°F
Avg Temperature
246 sunny days/yr
163
Violent Crime/100K
816 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$116,560 median income, 2.5% unemployment
B
Affordability
3.3 / 5.0
$705,700 home value, $2,232/mo rent
F
Safety
1.0 / 5.0
163 violent crimes/100K
A+
Education
5.0 / 5.0
56.4% bachelor's degree or higher
Waltham 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 42.6 inches. Air quality is rated Good with a median AQI of 37.
Temperature
28°F Jan (-3°C)
74°F Jul (23°C)
| Annual Average | 50.5°F |
| 6% below US avg | |
| January Average | 28°F (-3°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 115 ft (35 m) |
| Area | 12.8 sq mi (33.0 km²) |
| Population Density | 5,076/sq mi |
| Coordinates | 42.3889°N, 71.2423°W |
| Timezone | America/New_York |
| County | Middlesex County County |
| Nearest Airport | General Edward Lawrence Logan International (BOS) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0382 ppm |
| NO₂ (Nitrogen Dioxide) | 15.2 ppb |
| PM2.5 (Fine Particles) | 6.6 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.0 / 100 |
| Social Vulnerability | 15.8 / 100 |
| Community Resilience | 89.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-3°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 (23°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 |
Waltham has a seasonal temperature swing of 46°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").