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
$506,795 Zillow
$1,473
Median Rent
31.7% income on rent
50°F
Avg Temperature
117
Violent Crime/100K
728 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$88,901 median income, 5.4% unemployment
A
Affordability
4.4 / 5.0
$356,700 home value, $1,473/mo rent
F
Safety
1.0 / 5.0
117 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 50°F (10°C). Winters average 26°F in January while summers reach 74°F in July. Annual precipitation totals 40.4 inches. The area receives 75.5 inches of snow annually. Air quality is rated Good with a median AQI of 38.
Temperature
26°F Jan (-4°C)
74°F Jul (23°C)
| Annual Average | 50.1°F |
| 7% below US avg | |
| January Average | 26°F (-4°C) |
| July Average | 74°F (23°C) |
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 | 38.0 |
| Rating | Good |
| Good Days % | 83.6% |
| Unhealthy Days | 1 |
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 | 26°F (-4°C) | 2.4 in | Coldest, Driest |
| February | 28°F (-2°C) | 2.7 in | |
| March | 37°F (3°C) | 3.5 in | |
| April | 48°F (9°C) | 3.3 in | |
| May | 59°F (15°C) | 3.4 in | |
| June | 68°F (20°C) | 4.0 in | Wettest |
| July | 74°F (23°C) | 3.3 in | Warmest |
| August | 72°F (22°C) | 3.4 in | |
| September | 64°F (18°C) | 3.7 in | |
| October | 52°F (11°C) | 3.9 in | |
| November | 42°F (5°C) | 3.5 in | |
| December | 31°F (-0°C) | 3.3 in |
Derry has a seasonal temperature swing of 48°F / from 26°F in January to 74°F in July. Total annual precipitation is 40.4 inches, with June being the wettest month (4.0") and January the driest (2.4").