Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 1°C. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

5-day weather forecast updated at 04:04 on Tuesday 2nd December 2025 GMT

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The 5-day weather forecast for New Hampshire (Portsmouth) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Portsmouth weather forecast by day

Below are the detailed weather forecasts for Portsmouth for the next 5 days.

Portsmouth weather for Tuesday 2nd December 2025

Expect cloudy with sleet or snow in Portsmouth, New Hampshire with a maximum temperature of 1°C and no hours of bright sunshine. There are 30-40 mm of sleet/snow expected with 100% chance of some sleet or snow and little or no wind of 3 kph from the north.

  • 1°C maximum temperature1
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 100% chance of some sleet or snow100
    % chance of some sleet or snow
  • 30-40 mm of sleet/snow expected<40
    mm of sleet/snow expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 3 kph from the North3
    kph wind from N

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Portsmouth weather for Wednesday 3rd December 2025

Expect clear skies with flurries of snow in Portsmouth, New Hampshire with a maximum temperature of 2°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 9% chance of some snow and little or no wind of 2 kph from the north-west.

  • 2°C maximum temperature2
    °C maximum temperature
  • -3°C minimum temperature-3
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 9% chance of some snow9
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 2°C wind chill2
    °C wind chill
  • Little or no wind of 2 kph from the North-West2
    kph wind from NW

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Portsmouth weather for Thursday 4th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 2°C and no hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 kph from the north-west.

  • 2°C maximum temperature2
    °C maximum temperature
  • -11°C minimum temperature-11
    °C minimum temperature
  • Broken clouds
    broken clouds
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 2°C wind chill2
    °C wind chill
  • Little or no wind of 3 kph from the North-West3
    kph wind from NW

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Portsmouth weather for Friday 5th December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of -4°C, maximum UV of 1 (Low) and 9 hours of bright sunshine. There are 0 cm of snow expected and little or no wind of 2 kph from the west.

  • -4°C maximum temperature-4
    °C maximum temperature
  • -13°C minimum temperature-13
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -4°C wind chill-4
    °C wind chill
  • Little or no wind of 2 kph from the West2
    kph wind from W

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Portsmouth weather for Saturday 6th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 1°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 0 kph from the west.

  • 1°C maximum temperature1
    °C maximum temperature
  • -8°C minimum temperature-8
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 0 kph from the West0
    kph wind from W

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Metric (°C / mm)  |  Imperial (°F / inches)

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