The highest day temperature in December 2025 was 54°F. The lowest night temperature was 19°F. The average values for day and night temperatures during December were 40.5°F и 35.0°F respectivly.

The average sea surface temperature in December 2025 for Lewes was 43.2°F. The maximum and minimum values were 39.2°F and 49.8°F respectively.

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

Precipitation total in December for Lewes is 1.2 in.

The average wind speed in December is 11.3 mph. It makes December one of the most windy months of the year for Lewes.

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 Lewes in December is 5.5 hours.