The highest day temperature in December 2023 was 70°F. The lowest night temperature was 46°F. The average values for day and night temperatures during December were 62.6°F и 52.1°F respectivly.

The average sea surface temperature in December 2023 for San Jose was 61.4°F. The maximum and minimum values were 60.8°F and 62.4°F respectively.

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

Precipitation total in December for San Jose is 0.6 in.

The average wind speed in December is 7.2 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 San Jose in December is 8.1 hours.