Marlborough, MA
Full City Profile · Massachusetts · Middlesex County County
3.3
/5.0
B
Good
41,398
Population
1,985/sq mi density
$95,047
Median Income
$46,876 per capita
$485,400
Home Value
$577,911 Zillow
$1,721
Median Rent
32.5% income on rent
50°F
Avg Temperature
421
Violent Crime/100K
1,043 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$95,047 median income, 5.6% unemployment
B+
Affordability
3.8 / 5.0
$485,400 home value, $1,721/mo rent
F
Safety
1.0 / 5.0
421 violent crimes/100K (11% above avg)
A
Education
4.2 / 5.0
40.6% bachelor's degree or higher
Marlborough experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 26°F in January while summers reach 74°F in July. Annual precipitation totals 49.7 inches. The area receives 45.7 inches of snow annually. Air quality is rated Good with a median AQI of 37.
Temperature
26°F Jan (-3°C)
74°F Jul (23°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 453 ft (138 m) |
| Area | 22.1 sq mi (57.2 km²) |
| Population Density | 1,985/sq mi |
| Coordinates | 42.3496°N, 71.5472°W |
| Timezone | America/New_York |
| County | Middlesex County County |
| Nearest Airport | Worcester Regional (ORH) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
| Good Days % | 85.8% |
| Unhealthy Days | 0 |
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 | 26°F (-3°C) | 3.6 in | Coldest |
| February | 28°F (-2°C) | 3.3 in | Driest |
| March | 36°F (2°C) | 4.6 in | |
| April | 48°F (9°C) | 4.4 in | |
| May | 59°F (15°C) | 3.7 in | |
| June | 68°F (20°C) | 4.2 in | |
| July | 74°F (23°C) | 4.0 in | Warmest |
| August | 72°F (22°C) | 4.4 in | |
| September | 64°F (18°C) | 3.9 in | |
| October | 52°F (11°C) | 5.1 in | Wettest |
| November | 41°F (5°C) | 3.8 in | |
| December | 32°F (-0°C) | 4.9 in |
Marlborough has a seasonal temperature swing of 48°F / from 26°F in January to 74°F in July. Total annual precipitation is 49.7 inches, with October being the wettest month (5.1") and February the driest (3.3").