Warm-summer humid continental
Portsmouth, New Hampshire
Rockingham County, New Hampshire · Population 22k · 43 ft elevation
Living in Portsmouth
Portsmouth has a warm-summer humid continental climate: hot summers (July highs around 81°F) and cold winters (January lows around 17°F).
Precipitation is very wet at about 51″ a year, and it is a snowy place (65″ a season).
Skies are partly sunny (58% of possible sunshine). Summers get sticky, with about 25 muggy days a year.
Air quality is good: a median AQI of 38, with about 2 unhealthy-air days in the latest year.
Portsmouth at a glance
- Population
- 22k
- Elevation
- 43 ft
- Average daily high
- 57°F7th percentile
- Average daily low
- 38°F12th percentile
- Annual precipitation
- 51″78th percentile
- Annual snowfall
- 65″94th percentile
- Sunshine hours per year
- 2,619 hrs26th percentile
- Median AQI
- 3825th percentile
- Median home value
- $641k89th percentile
- Median rent
- $1,778/mo79th percentile
- Median household income
- $106k77th percentile
- Property tax rate
- 1.23%63th percentile
- Top state income-tax rate
- 0.0%
- Sales tax (state + local)
- 0.0%
- Unemployment rate
- 2.1%
- Homes with broadband
- 94%69th percentile
- Walkability index
- 9.865th percentile
- Average commute
- 22 min
- Math proficiency (8th grade)
- 72%86th percentile
- Reading proficiency (8th grade)
- 72%
- Violent crime rate
- 203 per 100k56th percentile
- Property crime rate
- 1,140 per 100k
- Overall natural-hazard risk
- 8641th percentile
- Outdoor access
- 5454th percentile
- Public land within 10 miles
- 2%
- Public land within 30 miles
- 3%
- Mountain relief within 30 miles
- 689 ft
Climate by month
| Month | High | Low | Precipitation | Snow | Sunshine |
|---|---|---|---|---|---|
| Jan | 33°F | 17°F | 3.6″ | 17.1″ | 155 hrs |
| Feb | 36°F | 18°F | 3.6″ | 15.8″ | 163 hrs |
| Mar | 44°F | 26°F | 4.8″ | 13.9″ | 206 hrs |
| Apr | 56°F | 35°F | 4.6″ | 2.3″ | 227 hrs |
| May | 66°F | 45°F | 4.0″ | — | 251 hrs |
| Jun | 75°F | 54°F | 4.6″ | — | 264 hrs |
| Jul | 81°F | 60°F | 3.9″ | — | 314 hrs |
| Aug | 80°F | 59°F | 3.7″ | — | 300 hrs |
| Sep | 72°F | 52°F | 4.1″ | — | 255 hrs |
| Oct | 60°F | 41°F | 5.0″ | 0.1″ | 191 hrs |
| Nov | 48°F | 31°F | 4.1″ | 1.6″ | 158 hrs |
| Dec | 38°F | 23°F | 4.9″ | 14.2″ | 137 hrs |
Near Portsmouth
- Newmarket, NH · 5.7k
- Hampton, NH · 10k
- Durham, NH · 11k
- Dover, NH · 33k
- Exeter, NH · 10k
- Hampton Beach, NH · 2.6k
- Somersworth, NH · 12k
- Epping, NH · 2.8k
Largest places in New Hampshire
- Manchester, NH · 115k
- Nashua, NH · 91k
- Concord, NH · 44k
- Rochester, NH · 33k
- Keene, NH · 23k
- Derry, NH · 22k
- Laconia, NH · 17k
- Lebanon, NH · 15k
Sources: NOAA climate normals, NASA POWER, EPA air quality, U.S. Census Bureau, FEMA, FBI, EPA walkability and EDFacts. Methodology