February weather forecast
Portsmouth, NH

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Bright neon lights and buildings next to the very calm waters of the iconic Piscataqua River in Portsmouth, New Hampshire
Bright neon lights and buildings next to the very calm waters of the iconic Piscataqua River in Portsmouth, New Hampshire

Weather in February

February's charm in Portsmouth lies within the slight temperature rise as it ushers in incrementally longer days, signaling the impending spring. However, on the similarity front, February mirrors January in the feature of relative humidity. The sea's temperature drops a bit compared to January but does not significantly disrupt the overall balance of the coastal weather. Snowfall decreases to 3.94" (100mm) falling over an average of eight days. Overall, the wind force weakens, making February less blustery than its predecessor.

Temperature

February brings an average high-temperature of an icy 34.2°F (1.2°C), nearly identical to the preceding month. During the February nights, an average temperature of 22.3°F (-5.4°C) is observed.

Humidity

The average relative humidity in February is 79%.

Rainfall

In February, in Portsmouth, the rain falls for 7.8 days. Throughout February, 2.09" (53mm) of precipitation is accumulated. In Portsmouth, during the entire year, the rain falls for 144.2 days and collects up to 27.48" (698mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Portsmouth. In February, in Portsmouth, it is snowing for 8 days. Throughout February, 3.94" (100mm) of snow is accumulated. Throughout the year, there are 35.2 snowfall days, and 16.97" (431mm) of snow is accumulated.

Ocean temperature

In Portsmouth, in February, the average water temperature is 38.8°F (3.8°C).
Note: In the course of swimming, this situation is life-threatening and fraught with risk. The severe cold of the water leads to immediate hyperventilation. Wearing a specialized swimsuit is critical to limit thermal injury.

Daylight

In Portsmouth, New Hampshire, the average length of the day in February is 10h and 33min.
On the first day of February, sunrise is at 6:58 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 5:31 pm EST.

Sunshine

The months with the least sunshine in Portsmouth are February and December, with an average of 4.8h of sunshine.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 2 during February translates into these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

How cold is February in Portsmouth?

In February, the average high-temperature and low-temperature in Portsmouth are 34.2°F (1.2°C) and 22.3°F (-5.4°C) respectively.

What is the average humidity in February in Portsmouth?

In Portsmouth, New Hampshire, the average relative humidity in February is 79%.

How many days does it rain in February in Portsmouth?

In Portsmouth, in February, it is raining for 7.8 days, with typically 2.09" (53mm) of accumulated precipitation.

How much does it snow in Portsmouth in February?

In Portsmouth, New Hampshire, during February, snow falls for 8 days and regularly aggregates up to 3.94" (100mm) of snow.

How cold is the water in February in Portsmouth?

In February, the average ocean temperature 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?

The average day length in February in Portsmouth, New Hampshire, is 10h and 33min.

When are sunrise and sunset in February in Portsmouth?

On the first day of February, sunrise is at 6:58 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 5:31 pm EST.

What are the months with the least sunshine in Portsmouth?

The months with the least sunshine in Portsmouth, New Hampshire, are February and December, with an average of 4.8h of sunshine.

How long on average sun shines in February in Portsmouth?

In February, the average sunshine duration in Portsmouth, New Hampshire, is 4.8h.

When is the lowest UV index in Portsmouth?

The months with the lowest UV index in Portsmouth, New Hampshire, are January through March, November and December, with an average maximum UV index of 2.

What is the UV index reading in February in Portsmouth?

The average daily maximum UV index in February is 2. A UV Index value of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFebruaryMAMJJASOND
Jan
February
Mar
Average high temperature
31.8°F -0.1°C
34.2°F 1.2°C
40.5°F 4.7°C
Average low temperature
21.2°F -6°C
22.3°F -5.4°C
28.8°F -1.8°C
Average pressure
29.99" 762mmHg
29.98" 761mmHg
30.02" 763mmHg
Average wind speed
11.7mph 18.8km/h
11.2mph 18km/h
10.7mph 17.2km/h
Average max. wind speed
12.3mph 19.8km/h
11.9mph 19.2km/h
11.4mph 18.3km/h
Average wind speed gusts
18.5mph 29.8km/h
18mph 29km/h
17mph 27.4km/h
Average humidity
79%
79%
78%
Average rainfall
2.05" 52mm
2.09" 53mm
2.4" 61mm
Average rainfall days
7.5
7.8
11.8
Average snowfall
4.02" 102mm
3.94" 100mm
2.68" 68mm
Average snowfall days
8.8
8
6.8
Average sea temperature
41.5°F 5.3°C
38.8°F 3.8°C
38.5°F 3.6°C
Average daylight
9h 2min
10h 4min
12h 0min
Average sunshine
5h 1min
4h 5min
5h 5min
Average sunshine days
15.9
14.1
13.9
Average UV index
2
2
2
Average cloud cover
45%
48%
50%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in February
Portsmouth, NH

Average temperature in February - Portsmouth, NH
  • Average high temperature in February: 34.2°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in February: 22.3°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

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Average pressure in February
Portsmouth, NH

Average pressure in February - Portsmouth, NH
  • Average pressure in February: 29.98"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in February
Portsmouth, NH

Average wind speed in February - Portsmouth, NH
  • Average wind speed in February: 11.2mph

The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in February
Portsmouth, NH

Average humidity in February - Portsmouth, NH
  • Average humidity in February: 79%

The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are April and November (75%).

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Average rainfall in February
Portsmouth, NH

Average rainfall in February - Portsmouth, NH
  • Average rainfall in February: 2.09"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in February
Portsmouth, NH

Average rainfall days in February - Portsmouth, NH
  • Average rainfall days in February: 7.8 days

The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (7.5 days).

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Average snowfall in February
Portsmouth, NH

Average snowfall in February - Portsmouth, NH
  • Average snowfall in February: 3.94"

The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in February
Portsmouth, NH

Average snowfall days in February - Portsmouth, NH
  • Average snowfall days in February: 8 days

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in February
Portsmouth, NH

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).

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Average daylight in February /
Average sunshine in February
Portsmouth, NH

Average daylight in February / Average sunshine in February - Portsmouth, NH
  • Average daylight in February: 10h and 4min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in February: 4h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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Average sunshine days in February
Portsmouth, NH

Average sunshine days in February - Portsmouth, NH
  • Average sunshine days in February: 14.1 days

The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is April (13.2 days).

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Average UV index in February
Portsmouth, NH

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

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in February
Portsmouth, NH

Average cloud cover in February - Portsmouth, NH
  • Average cloud cover in February: 48

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in February
Portsmouth, NH

Average visibility in February - Portsmouth, NH
  • Average visibility in February: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Portsmouth, New Hampshire, USA

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