All Countries
Plymouth, NH
Full City Profile · New Hampshire · Grafton County County
3.7
/5.0
B+
Good
4,877
Population
829/sq mi density
$77,368
Median Income
$34,335 per capita
$274,200
Home Value
$358,617 Zillow
$1,312
Median Rent
24.7% income on rent
43°F
Avg Temperature
246 sunny days/yr
148
Violent Crime/100K
1,125 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.1 / 5.0
$77,368 median income, 4.9% unemployment
A+
Affordability
4.7 / 5.0
$274,200 home value, $1,312/mo rent
F
Safety
1.0 / 5.0
148 violent crimes/100K
A+
Education
5.0 / 5.0
60.8% bachelor's degree or higher
Plymouth has a cool climate with an average annual temperature of 43°F (6°C). Winters average 18°F in January while summers reach 67°F in July. The area gets 246 sunny days per year. Annual precipitation totals 44.5 inches. The area receives 68.3 inches of snow annually. Air quality is rated Good with a median AQI of 37.
Temperature
18°F Jan (-8°C)
67°F Jul (20°C)
| Annual Average | 43.4°F |
| 20% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 67°F (20°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 886 ft (270 m) |
| Area | 3.7 sq mi (9.6 km²) |
| Population Density | 829/sq mi |
| Coordinates | 43.7388°N, 71.7026°W |
| Timezone | America/New_York |
| County | Grafton County County |
| Nearest Airport | Eastern Slopes Regional (FRY) 41 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0398 ppm |
| PM2.5 (Fine Particles) | 5.7 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 81.8 / 100 |
| Social Vulnerability | 27.4 / 100 |
| Community Resilience | 72.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Avalanche | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 2.9 in | Coldest |
| February | 20°F (-7°C) | 2.8 in | Driest |
| March | 30°F (-1°C) | 3.1 in | |
| April | 42°F (5°C) | 3.3 in | |
| May | 54°F (12°C) | 3.9 in | |
| June | 62°F (17°C) | 3.7 in | |
| July | 67°F (20°C) | 3.8 in | Warmest |
| August | 65°F (18°C) | 4.0 in | |
| September | 57°F (14°C) | 3.2 in | |
| October | 46°F (8°C) | 3.7 in | |
| November | 35°F (2°C) | 4.1 in | Wettest |
| December | 23°F (-5°C) | 3.6 in |
Plymouth has a seasonal temperature swing of 49°F / from 18°F in January to 67°F in July. Total annual precipitation is 42.1 inches, with November being the wettest month (4.1") and February the driest (2.8").