The highest day temperature in December 2023 was 53°F. The lowest night temperature was 19°F. The average values for day and night temperatures during December were 37.4°F и 34.4°F respectivly.

The average sea surface temperature in December 2023 for Rockland was 43.1°F. The maximum and minimum values were 40.2°F and 46.6°F respectively.

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

Precipitation total in December for Rockland is 1.8 in. It makes december the most rainy month of the year.

The average wind speed in December is 11.6 mph. It makes December the most windy month of the year for Rockland.

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 Rockland in December is 4.2 hours.