Longyearbyen weather in December 2025

Expect daytime maximum temperatures of 12°F in Longyearbyen, Svalbard in December based on long-term weather averages. There are no hours of sunshine per day on average with 12 days with some rainfall, which might fall as snow.

  • 12°F maximum daytime temperature in December in Longyearbyen12
    12°F max day temperature
  • 0 hours of sunshine per day
  • 12 days with some rainfall in December in Longyearbyen12
    12 days with some rainfall
  • -0°F minimum night-time temperature in December in Longyearbyen-0
    -0°F min night temperature
  • 0 hours of daylight per day in December in Longyearbyen0
    0 hours of daylight per day
  • No heat & humidity in December in Longyearbyen0
    No heat & humidity
  • 1.0 inches monthly rainfall in December in Longyearbyen1.0
    1.0 inches of monthly rainfall
  • No UV (maximum) index in December in Longyearbyen0
    No UV (Maximum) Index UV index
  • 28°F sea temperature in December in Longyearbyen28
    28°F sea temperature

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Longyearbyen by month

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The December weather guide for Svalbard, represented by Longyearbyen, (Longyearbyen) 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 Longyearbyen in December?

Daytime temperatures usually reach 12°F in Longyearbyen in December, falling to -0°F at night.

How sunny is it in Longyearbyen in December?

There are normally 0 hours of bright sunshine each day in Longyearbyen in December - that's 0% of daylight hours.

How warm is the sea around Longyearbyen in December?

The average sea temperature around Longyearbyen in December is 28°F.

Does it rain in Longyearbyen in December?

There are usually 12 days with some rain in Longyearbyen in December and the average monthly rainfall is 1.0 inches. Rain may fall as snow in this month.

Longyearbyen December sunrise & sunset times

Browse the sunrise and sunset times for Longyearbyen in December 2025. Select a month to view Longyearbyen sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 Darkness all day
Tuesday, 16th December 2025 Darkness all day
Wednesday, 31st December 2025 Darkness all day

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