Portsmouth weather in December 2024

Expect 37°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Portsmouth in December. Check more long-term weather averages for Portsmouth in December before you book your next holiday to New Hampshire in 2024/2025.

  • 37°F maximum daytime temperature in December in Portsmouth37
    37°F max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in December in Portsmouth12
    12 days with some rainfall
  • 19°F minimum night-time temperature in December in Portsmouth19
    19°F min night temperature
  • 9 hours of daylight per day in December in Portsmouth9
    9 hours of daylight per day
  • No heat & humidity in December in Portsmouth0
    No heat & humidity
  • 4.2 inches monthly rainfall in December in Portsmouth4.2
    4.2 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Portsmouth1
    1 (Low) UV index
  • 45°F sea temperature in December in Portsmouth45
    45°F sea temperature

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The December weather guide for New Hampshire (Portsmouth) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How cold is it in Portsmouth in December?

Daytime temperatures usually reach 37°F in Portsmouth in December, falling to 19°F at night.

How sunny is it in Portsmouth in December?

There are normally 5 hours of bright sunshine each day in Portsmouth in December - that's 50% of daylight hours.

How warm is the sea around Portsmouth in December?

The average sea temperature around Portsmouth in December is 45°F.

Does it rain in Portsmouth in December?

There are usually 12 days with some rain in Portsmouth in December and the average monthly rainfall is 4.2 inches. Rain may fall as snow in this month.

Portsmouth December sunrise & sunset times

Browse the sunrise and sunset times for Portsmouth in December 2024. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st December 2024 06:55 16:09
Monday, 16th December 2024 07:09 16:09
Tuesday, 31st December 2024 07:15 16:18

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