Portsmouth
New Hampshire, USA
Long-term weather forecast
Long-term weather forecast

February weather forecast and climate
Portsmouth, NH

Bright neon lights and buildings next to the very calm waters of the iconic Piscataqua River in Portsmouth, New Hampshire, the clear dusk sky in close up view
Bright neon lights and buildings next to the very calm waters of the iconic Piscataqua River in Portsmouth, New Hampshire, the clear dusk sky in close up view
February, the last month of the winter, in Portsmouth, is another cold month, with temperature in the range of an average high of 32°F (0°C) and an average low of 18°F (-7.8°C).

Temperature

The coldest months are January and February, with an average high-temperature of 32°F (0°C).

Rainfall

In Portsmouth, during February, the rain falls for 9 days and regularly aggregates up to 3.5" (88mm) of precipitation. Throughout the year, in Portsmouth, New Hampshire, there are 125 rainfall days, and 42.4" (1078mm) of precipitation is accumulated.

Ocean temperature

In February, the average ocean temperature in Portsmouth is 38.8°F (3.8°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

Daylight

The average length of the day in February is 10.6h.

Sunshine

In Portsmouth, the average sunshine is 6h.

UV index

In Portsmouth, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 2 in February interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What are the coldest months in Portsmouth?

January and February, with an average high-temperature of 32°F (0°C), are the coldest months.

What is the temperature in February in Portsmouth?

In Portsmouth, New Hampshire, in February, the average high-temperature is 32°F (0°C), and the average low-temperature is 18°F (-7.8°C).

How many days does it rain in February in Portsmouth?

In February, the rain falls for 9 days. Throughout February, 3.5" (88mm) of precipitation is accumulated.

What is the ocean temperature in February in Portsmouth?

In Portsmouth, New Hampshire, the average seawater temperature in February is 38.8°F (3.8°C). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

What is the average length of the day in February in Portsmouth?

In Portsmouth, New Hampshire, the average length of the day in February is 10.6h.

How many hours of sunshine does Portsmouth have in February?

In February, the average sunshine in Portsmouth is 6h.

What is the UV index reading in February in Portsmouth?

The average daily maximum UV index in February is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.
Average temperature in February - Portsmouth, NH
  • Average high temperature in February: 32°F

The warmest month (with the highest average high temperature) is July (79°F).
Months with the lowest average high temperature are January and February (32°F).

  • Average low temperature in February: 18°F

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (16°F).

Average rainfall in February - Portsmouth, NH
  • Average rainfall in February: 3.5"

The wettest month (with the highest rainfall) is November (4.9").
The driest month (with the lowest rainfall) is August (2.8").

Average rainfall days in February - Portsmouth, NH
  • Average rainfall days in February: 9 days

Months with the highest number of rainy days are May and December (12 days).
The month with the lowest number of rainy days is September (8 days).

Average sea temperature in February - Portsmouth, NH
  • Average sea temperature in February: 38.8°F

The best month for swimming (with the highest average sea temperature) is August (65.6°F).
The coldest month (with the lowest average sea temperature) is March (38.5°F).

Average daylight in February / Average sunshine in February - Portsmouth, NH
  • Average daylight in February: 10.6h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in February: 6h

Months with most sunshine are June, July and August (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 5).

Average UV index in February - Portsmouth, NH
  • Average UV index in February: 2

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).