The highest day temperature in December 2025 was 51°F. The lowest night temperature was 17°F. The average values for day and night temperatures during December were 39.8°F и 33.5°F respectivly.

The average sea surface temperature in December 2025 for Atlantic City was 41.6°F. The maximum and minimum values were 38.8°F and 48.2°F respectively.

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

Precipitation total in December for Atlantic City is 2.1 in.

The average wind speed in December is 12.4 mph.

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 Atlantic City in December is 5.3 hours.