The highest day temperature in December 2025 was 55°F. The lowest night temperature was 17°F. The average values for day and night temperatures during December were 34.5°F и 31.2°F respectivly.

The average sea surface temperature in December 2025 for Provincetown was 44.6°F. The maximum and minimum values were 40.0°F and 48.4°F respectively.

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

Precipitation total in December for Provincetown is 1.2 in. It makes december one of the most rainy months of the year.

The average wind speed in December is 15.4 mph. It makes December the most windy month of the year for Provincetown.

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 Provincetown in December is 4.4 hours.