Portland weather in December 2024

Expect 36°F daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Portland in December. Check more long-term weather averages for Portland in December before you book your next holiday to Maine in 2024/2025.

  • 36°F maximum daytime temperature in December in Portland36
    36°F max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in December in Portland12
    12 days with some rainfall
  • 18°F minimum night-time temperature in December in Portland18
    18°F min night temperature
  • 9 hours of daylight per day in December in Portland9
    9 hours of daylight per day
  • No heat & humidity in December in Portland0
    No heat & humidity
  • 4.6 inches monthly rainfall in December in Portland4.6
    4.6 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Portland1
    1 (Low) UV index
  • 45°F sea temperature in December in Portland45
    45°F sea temperature

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The December weather guide for Maine (Portland) 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 Portland in December?

Daytime temperatures usually reach 36°F in Portland in December, falling to 18°F at night.

How sunny is it in Portland in December?

There are normally 4 hours of bright sunshine each day in Portland in December - that's 48% of daylight hours.

How warm is the sea around Portland in December?

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

Does it rain in Portland in December?

There are usually 12 days with some rain in Portland in December and the average monthly rainfall is 4.6 inches. Rain may fall as snow in this month.

Portland December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st December 2024 06:55 16:05
Monday, 16th December 2024 07:09 16:05
Tuesday, 31st December 2024 07:14 16:14

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