The highest day temperature in December 2023 was 58°F. The lowest night temperature was 30°F. The average values for day and night temperatures during December were 49.4°F и 41.5°F respectivly.

The average sea surface temperature in December 2023 for Trieste was 56.2°F. The maximum and minimum values were 51.8°F and 59.8°F respectively.

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

Precipitation total in December for Trieste is 4.0 in. It makes december one of the most rainy months of the year.

The average wind speed in December is 5.0 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 Trieste in December is 4.7 hours.