The highest day temperature in December 2023 was 64°F. The lowest night temperature was 38°F. The average values for day and night temperatures during December were 53.4°F и 46.9°F respectivly.

The average sea surface temperature in December 2023 for Bilbao was 59.1°F. The maximum and minimum values were 57.2°F and 61.2°F respectively.

You can expect various weather conditions during December. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in December for Bilbao is 3.4 in. It makes december one of the most rainy months of the year.

The average wind speed in December is 8.5 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 Bilbao in December is 4.9 hours.