The highest day temperature in December 2023 was 55°F. The lowest night temperature was 14°F. The average values for day and night temperatures during December were 36.3°F и 31.7°F respectivly.

The average sea surface temperature in December 2023 for Mount Desert Island was 43.4°F. The maximum and minimum values were 41.2°F and 45.8°F respectively.

Most of the days in December are gloomy but you can also expect sunny days.

Precipitation total in December for Mount Desert Island is 2.1 in. It makes december the most rainy month of the year.

The average wind speed in December is 10.5 mph. It makes December one of the most windy months of the year for Mount Desert Island.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Mount Desert Island in December is 3.9 hours.