When to visit
Portsmouth?

Discover the best time of year, based on historical climate, temperature, and precipitation.

Portsmouth
State of New Hampshire · United States of America

The best weather in Portsmouth is from May, August, September.consistent weather climate

Climate score
June
79

Excellent climate

🌦Humid

Temperature
14–24°C
Cool nights
Feels like
14–24°C
Comfortable
Precipitation
90mm
Moderate rain · 10 days
Sunshine
11.3h
Mostly cloudy
Humidity (%)
74%
Comfortable
Annual Climate Analysis
Temperature, Rain & Feels Like
Rain
Actual Temp
Feels Like
-20°-10°10°20°30°40°JanFebMarAprMayJunJulAugSepOctNovDec
Monthly Overview
Score121313318279798083582410
ClimatePolarPolarColdColdMildHumidHumidHumidHumidCool & rainyColdCold
Temperature-6–2°C-7–3°C-3–6°C3–12°C9–19°C14–24°C18–27°C18–26°C14–23°C8–16°C2–10°C-3–4°C
Feels like-12–-3°C-12–-1°C-8–2°C-1–9°C7–18°C14–24°C19–30°C19–28°C14–23°C6–15°C-2–6°C-8–0°C
Precipitation100mm
11 days
87mm
10 days
103mm
10 days
113mm
11 days
70mm
8 days
90mm
10 days
99mm
9 days
96mm
8 days
87mm
7 days
118mm
10 days
86mm
8 days
125mm
11 days
Sunshine6.0h
☀︎ 63%
6.9h
☀︎ 66%
8.0h
☀︎ 67%
8.0h
☀︎ 60%
10.1h
☀︎ 68%
11.3h
☀︎ 74%
11.6h
☀︎ 77%
11.0h
☀︎ 79%
9.3h
☀︎ 75%
7.4h
☀︎ 68%
6.6h
☀︎ 68%
5.6h
☀︎ 62%
WindW · 20 km/hW · 20 km/hW · 21 km/hW · 20 km/hS · 18 km/hS · 17 km/hSW · 15 km/hSW · 15 km/hSW · 16 km/hW · 18 km/hW · 19 km/hW · 19 km/h
Humidity (%)69%70%68%70%71%74%76%77%78%78%74%75%
Day length9.4h10.5h12.0h13.4h14.7h15.3h15.0h13.9h12.5h11.0h9.7h9.1h

Frequently asked questions

What is the best time to visit Portsmouth?

The best time to visit Portsmouth is September, May, June, July, August, with temperatures between 9 °C and 27 °C. The best month is September. September is low season.

What is the weather like in Portsmouth?

Portsmouth has a climate with an overall score of 4.7/10. Annual temperatures range from -7 °C to 27 °C.

What is the hottest month in Portsmouth?

The hottest month in Portsmouth is July, with average highs of 27 °C and lows of 18 °C.

What is the rainiest month in Portsmouth?

The rainiest month in Portsmouth is December, with an average of 125 mm of precipitation.