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Londonderry, NH
Full City Profile · New Hampshire · Rockingham County County
3.8
/5.0
B+
Good
12,307
Population
1,007/sq mi density
$113,109
Median Income
$50,833 per capita
$433,100
Home Value
$596,462 Zillow
$1,917
Median Rent
32.9% income on rent
48°F
Avg Temperature
246 sunny days/yr
75
Violent Crime/100K
651 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$113,109 median income, 3.2% unemployment
A+
Affordability
4.5 / 5.0
$433,100 home value, $1,917/mo rent
F
Safety
1.0 / 5.0
75 violent crimes/100K
A+
Education
4.7 / 5.0
46.1% bachelor's degree or higher
Londonderry experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 23°F in January while summers reach 72°F in July. The area gets 246 sunny days per year. Annual precipitation totals 46.1 inches. The area receives 66.8 inches of snow annually. Air quality is rated Good with a median AQI of 37.
Temperature
23°F Jan (-5°C)
72°F Jul (22°C)
| Annual Average | 47.9°F |
| 11% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 314 ft (96 m) |
| Area | 12.2 sq mi (31.7 km²) |
| Population Density | 1,007/sq mi |
| Coordinates | 42.8534°N, 71.3624°W |
| Timezone | America/New_York |
| County | Rockingham County County |
| Nearest Airport | Manchester Boston Regional (MHT) 7 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 | 23°F (-5°C) | 3.2 in | Coldest |
| February | 25°F (-4°C) | 3.0 in | Driest |
| March | 34°F (1°C) | 3.2 in | |
| April | 45°F (7°C) | 3.5 in | |
| May | 56°F (13°C) | 3.6 in | |
| June | 65°F (18°C) | 3.4 in | |
| July | 72°F (22°C) | 3.5 in | Warmest |
| August | 69°F (21°C) | 3.5 in | |
| September | 61°F (16°C) | 3.3 in | |
| October | 50°F (10°C) | 3.6 in | |
| November | 40°F (4°C) | 4.4 in | Wettest |
| December | 28°F (-2°C) | 3.6 in |
Londonderry has a seasonal temperature swing of 49°F / from 23°F in January to 72°F in July. Total annual precipitation is 41.7 inches, with November being the wettest month (4.4") and February the driest (3.0").