Rockland weather in December 2025

Expect daytime maximum temperatures of 34°F in Rockland, Maine in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 13 days with some rainfall and typically 4.7 inches of rainfall in the month, which might fall as snow.

  • 34°F maximum daytime temperature in December in Rockland34
    34°F max day temperature
  • 4 hours of sunshine per day
  • 13 days with some rainfall in December in Rockland13
    13 days with some rainfall
  • 18°F minimum night-time temperature in December in Rockland18
    18°F min night temperature
  • 9 hours of daylight per day in December in Rockland9
    9 hours of daylight per day
  • No heat & humidity in December in Rockland0
    No heat & humidity
  • 4.7 inches monthly rainfall in December in Rockland4.7
    4.7 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Rockland1
    1 (Low) UV index
  • 45°F sea temperature in December in Rockland45
    45°F sea temperature

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

Daytime temperatures usually reach 34°F in Rockland in December, falling to 18°F at night.

How sunny is it in Rockland in December?

There are normally 4 hours of bright sunshine each day in Rockland in December - that's 39% of daylight hours.

How warm is the sea around Rockland in December?

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

Does it rain in Rockland in December?

There are usually 13 days with some rain in Rockland in December and the average monthly rainfall is 4.7 inches. Rain may fall as snow in this month.

Rockland December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:52 15:59
Tuesday, 16th December 2025 07:05 15:59
Wednesday, 31st December 2025 07:11 16:08

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