Rockland weather in December 2026

Q: How cold is it in Rockland in December?

Daytime temperatures usually reach 0°C in Rockland in December, falling to -9°C at night.

Q: How sunny is it in Rockland in December?

There are normally 4 hours of bright sunshine each day in Rockland in December - that's 40% of daylight hours.

Q: 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 106mm. Rain may fall as snow in this month.

Expect daytime maximum temperatures of 1°C 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 119 mm of rainfall in the month, which might fall as snow.

1
1°C max day temperature
4
4 hours of sunshine per day
13
13 days with some rainfall
-8
-8°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
119
119 mm of monthly rainfall
1
1 (Low) UV index
7
7°C 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 / mm) | Imperial (°F / inches)

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How cold is it in Rockland in December?

Daytime temperatures usually reach 0°C in Rockland in December, falling to -9°C 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 40% of daylight hours.

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 106mm. Rain may fall as snow in this month.