The highest day temperature in December 2023 was 64°F. The lowest night temperature was 45°F. The average values for day and night temperatures during December were 56.2°F и 51.5°F respectivly.

The average sea surface temperature in December 2023 for Porto was 60.3°F. The maximum and minimum values were 58.4°F and 62.0°F respectively.

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

Precipitation total in December for Porto is 6.6 in. It makes december the most rainy month of the year.

The average wind speed in December is 8.0 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 Porto in December is 5.1 hours.