The highest day temperature in December 2023 was 59°F. The lowest night temperature was 31°F. The average values for day and night temperatures during December were 52.9°F и 48.2°F respectivly.

The average sea surface temperature in December 2023 for Diano Marina was 61.6°F. The maximum and minimum values were 59.6°F and 63.6°F respectively.

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

Precipitation total in December for Diano Marina is 2.3 in. It makes december one of the most rainy months of the year.

The average wind speed in December is 7.5 mph. This value is relatively stable throughout the year.

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 Diano Marina in December is 6.1 hours.