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Derry, NH
Full City Profile · New Hampshire · Rockingham County County
3.4
/5.0
B
Good
21,668
Population
1,353/sq mi density
$88,901
Median Income
$47,210 per capita
$356,700
Home Value
$483,915 Zillow
$1,473
Median Rent
31.7% income on rent
48°F
Avg Temperature
246 sunny days/yr
98
Violent Crime/100K
829 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$88,901 median income, 3.8% unemployment
A
Affordability
4.4 / 5.0
$356,700 home value, $1,473/mo rent
F
Safety
1.0 / 5.0
98 violent crimes/100K
B+
Education
3.7 / 5.0
34.0% bachelor's degree or higher
Derry experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 24°F in January while summers reach 71°F in July. The area gets 246 sunny days per year. Annual precipitation totals 46.7 inches. The area receives 75.5 inches of snow annually. Air quality is rated Good with a median AQI of 37.
Temperature
24°F Jan (-4°C)
71°F Jul (22°C)
| Annual Average | 47.8°F |
| 11% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 521 ft (159 m) |
| Area | 15.5 sq mi (40.0 km²) |
| Population Density | 1,353/sq mi |
| Coordinates | 42.8876°N, 71.2820°W |
| Timezone | America/New_York |
| County | Rockingham County County |
| Nearest Airport | Manchester Boston Regional (MHT) 8 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0417 ppm |
| NO₂ (Nitrogen Dioxide) | 3.5 ppb |
| SO₂ (Sulfur Dioxide) | 0.60 ppb |
| CO (Carbon Monoxide) | 0.18 ppm |
| PM2.5 (Fine Particles) | 6.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 85.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 78.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Coastal Flood | Relatively High |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 3.4 in | Coldest |
| February | 25°F (-4°C) | 3.0 in | Driest |
| March | 34°F (1°C) | 3.4 in | |
| April | 45°F (7°C) | 3.7 in | |
| May | 56°F (13°C) | 3.6 in | |
| June | 64°F (18°C) | 3.4 in | |
| July | 71°F (22°C) | 3.4 in | Warmest |
| August | 68°F (20°C) | 3.5 in | |
| September | 60°F (16°C) | 3.4 in | |
| October | 49°F (10°C) | 3.8 in | |
| November | 40°F (4°C) | 4.3 in | Wettest |
| December | 29°F (-2°C) | 3.7 in |
Derry has a seasonal temperature swing of 47°F / from 24°F in January to 71°F in July. Total annual precipitation is 42.5 inches, with November being the wettest month (4.3") and February the driest (3.0").